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layout/style/nsCSSParser.cpp@925c144e1f1f (annotated)

layout/style/nsCSSParser.cpp

Fri, 16 Jan 2015 18:13:44 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Fri, 16 Jan 2015 18:13:44 +0100

branch

TOR_BUG_9701

changeset 14

925c144e1f1f

permissions

-rw-r--r--

Integrate suggestion from review to improve consistency with existing code.

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* vim: set ts=2 et sw=2 tw=78: */
michael@0	3	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	/* parsing of CSS stylesheets, based on a token stream from the CSS scanner */
michael@0	8
michael@0	9	#include "mozilla/ArrayUtils.h"
michael@0	10	#include "mozilla/DebugOnly.h"
michael@0	11
michael@0	12	#include "nsCSSParser.h"
michael@0	13	#include "nsCSSProps.h"
michael@0	14	#include "nsCSSKeywords.h"
michael@0	15	#include "nsCSSScanner.h"
michael@0	16	#include "mozilla/css/ErrorReporter.h"
michael@0	17	#include "mozilla/css/Loader.h"
michael@0	18	#include "mozilla/css/StyleRule.h"
michael@0	19	#include "mozilla/css/ImportRule.h"
michael@0	20	#include "nsCSSRules.h"
michael@0	21	#include "mozilla/css/NameSpaceRule.h"
michael@0	22	#include "nsTArray.h"
michael@0	23	#include "nsCSSStyleSheet.h"
michael@0	24	#include "mozilla/css/Declaration.h"
michael@0	25	#include "nsStyleConsts.h"
michael@0	26	#include "nsNetUtil.h"
michael@0	27	#include "nsCOMPtr.h"
michael@0	28	#include "nsString.h"
michael@0	29	#include "nsIAtom.h"
michael@0	30	#include "nsColor.h"
michael@0	31	#include "nsCSSPseudoClasses.h"
michael@0	32	#include "nsCSSPseudoElements.h"
michael@0	33	#include "nsNameSpaceManager.h"
michael@0	34	#include "nsXMLNameSpaceMap.h"
michael@0	35	#include "nsError.h"
michael@0	36	#include "nsIMediaList.h"
michael@0	37	#include "nsStyleUtil.h"
michael@0	38	#include "nsIPrincipal.h"
michael@0	39	#include "prprf.h"
michael@0	40	#include "nsContentUtils.h"
michael@0	41	#include "nsAutoPtr.h"
michael@0	42	#include "CSSCalc.h"
michael@0	43	#include "nsMediaFeatures.h"
michael@0	44	#include "nsLayoutUtils.h"
michael@0	45	#include "mozilla/Preferences.h"
michael@0	46	#include "nsRuleData.h"
michael@0	47	#include "mozilla/CSSVariableValues.h"
michael@0	48	#include "mozilla/dom/URL.h"
michael@0	49
michael@0	50	using namespace mozilla;
michael@0	51
michael@0	52	typedef nsCSSProps::KTableValue KTableValue;
michael@0	53
michael@0	54	const uint32_t
michael@0	55	nsCSSProps::kParserVariantTable[eCSSProperty_COUNT_no_shorthands] = {
michael@0	56	#define CSS_PROP(name_, id_, method_, flags_, pref_, parsevariant_, kwtable_, \
michael@0	57	stylestruct_, stylestructoffset_, animtype_) \
michael@0	58	parsevariant_,
michael@0	59	#include "nsCSSPropList.h"
michael@0	60	#undef CSS_PROP
michael@0	61	};
michael@0	62
michael@0	63	// Maximum number of repetitions for the repeat() function
michael@0	64	// in the grid-template-columns and grid-template-rows properties,
michael@0	65	// to limit high memory usage from small stylesheets.
michael@0	66	// Must be a positive integer. Should be large-ish.
michael@0	67	#define GRID_TEMPLATE_MAX_REPETITIONS 10000
michael@0	68
michael@0	69	// End-of-array marker for mask arguments to ParseBitmaskValues
michael@0	70	#define MASK_END_VALUE (-1)
michael@0	71
michael@0	72	MOZ_BEGIN_ENUM_CLASS(CSSParseResult, int32_t)
michael@0	73	// Parsed something successfully:
michael@0	74	Ok,
michael@0	75	// Did not find what we were looking for, but did not consume any token:
michael@0	76	NotFound,
michael@0	77	// Unexpected token or token value, too late for UngetToken() to be enough:
michael@0	78	Error
michael@0	79	MOZ_END_ENUM_CLASS(CSSParseResult)
michael@0	80
michael@0	81	namespace {
michael@0	82
michael@0	83	// Rule processing function
michael@0	84	typedef void (* RuleAppendFunc) (css::Rule* aRule, void* aData);
michael@0	85	static void AssignRuleToPointer(css::Rule* aRule, void* aPointer);
michael@0	86	static void AppendRuleToSheet(css::Rule* aRule, void* aParser);
michael@0	87
michael@0	88	struct CSSParserInputState {
michael@0	89	nsCSSScannerPosition mPosition;
michael@0	90	nsCSSToken mToken;
michael@0	91	bool mHavePushBack;
michael@0	92	};
michael@0	93
michael@0	94	// Your basic top-down recursive descent style parser
michael@0	95	// The exposed methods and members of this class are precisely those
michael@0	96	// needed by nsCSSParser, far below.
michael@0	97	class CSSParserImpl {
michael@0	98	public:
michael@0	99	CSSParserImpl();
michael@0	100	~CSSParserImpl();
michael@0	101
michael@0	102	nsresult SetStyleSheet(nsCSSStyleSheet* aSheet);
michael@0	103
michael@0	104	nsresult SetQuirkMode(bool aQuirkMode);
michael@0	105
michael@0	106	nsresult SetChildLoader(mozilla::css::Loader* aChildLoader);
michael@0	107
michael@0	108	// Clears everything set by the above Set*() functions.
michael@0	109	void Reset();
michael@0	110
michael@0	111	nsresult ParseSheet(const nsAString& aInput,
michael@0	112	nsIURI* aSheetURI,
michael@0	113	nsIURI* aBaseURI,
michael@0	114	nsIPrincipal* aSheetPrincipal,
michael@0	115	uint32_t aLineNumber,
michael@0	116	bool aAllowUnsafeRules);
michael@0	117
michael@0	118	nsresult ParseStyleAttribute(const nsAString& aAttributeValue,
michael@0	119	nsIURI* aDocURL,
michael@0	120	nsIURI* aBaseURL,
michael@0	121	nsIPrincipal* aNodePrincipal,
michael@0	122	css::StyleRule** aResult);
michael@0	123
michael@0	124	nsresult ParseDeclarations(const nsAString& aBuffer,
michael@0	125	nsIURI* aSheetURL,
michael@0	126	nsIURI* aBaseURL,
michael@0	127	nsIPrincipal* aSheetPrincipal,
michael@0	128	css::Declaration* aDeclaration,
michael@0	129	bool* aChanged);
michael@0	130
michael@0	131	nsresult ParseRule(const nsAString& aRule,
michael@0	132	nsIURI* aSheetURL,
michael@0	133	nsIURI* aBaseURL,
michael@0	134	nsIPrincipal* aSheetPrincipal,
michael@0	135	css::Rule** aResult);
michael@0	136
michael@0	137	nsresult ParseProperty(const nsCSSProperty aPropID,
michael@0	138	const nsAString& aPropValue,
michael@0	139	nsIURI* aSheetURL,
michael@0	140	nsIURI* aBaseURL,
michael@0	141	nsIPrincipal* aSheetPrincipal,
michael@0	142	css::Declaration* aDeclaration,
michael@0	143	bool* aChanged,
michael@0	144	bool aIsImportant,
michael@0	145	bool aIsSVGMode);
michael@0	146
michael@0	147	void ParseMediaList(const nsSubstring& aBuffer,
michael@0	148	nsIURI* aURL, // for error reporting
michael@0	149	uint32_t aLineNumber, // for error reporting
michael@0	150	nsMediaList* aMediaList,
michael@0	151	bool aHTMLMode);
michael@0	152
michael@0	153	nsresult ParseVariable(const nsAString& aVariableName,
michael@0	154	const nsAString& aPropValue,
michael@0	155	nsIURI* aSheetURL,
michael@0	156	nsIURI* aBaseURL,
michael@0	157	nsIPrincipal* aSheetPrincipal,
michael@0	158	css::Declaration* aDeclaration,
michael@0	159	bool* aChanged,
michael@0	160	bool aIsImportant);
michael@0	161
michael@0	162	bool ParseColorString(const nsSubstring& aBuffer,
michael@0	163	nsIURI* aURL, // for error reporting
michael@0	164	uint32_t aLineNumber, // for error reporting
michael@0	165	nsCSSValue& aValue);
michael@0	166
michael@0	167	nsresult ParseSelectorString(const nsSubstring& aSelectorString,
michael@0	168	nsIURI* aURL, // for error reporting
michael@0	169	uint32_t aLineNumber, // for error reporting
michael@0	170	nsCSSSelectorList **aSelectorList);
michael@0	171
michael@0	172	already_AddRefed<nsCSSKeyframeRule>
michael@0	173	ParseKeyframeRule(const nsSubstring& aBuffer,
michael@0	174	nsIURI* aURL,
michael@0	175	uint32_t aLineNumber);
michael@0	176
michael@0	177	bool ParseKeyframeSelectorString(const nsSubstring& aSelectorString,
michael@0	178	nsIURI* aURL, // for error reporting
michael@0	179	uint32_t aLineNumber, // for error reporting
michael@0	180	InfallibleTArray<float>& aSelectorList);
michael@0	181
michael@0	182	bool EvaluateSupportsDeclaration(const nsAString& aProperty,
michael@0	183	const nsAString& aValue,
michael@0	184	nsIURI* aDocURL,
michael@0	185	nsIURI* aBaseURL,
michael@0	186	nsIPrincipal* aDocPrincipal);
michael@0	187
michael@0	188	bool EvaluateSupportsCondition(const nsAString& aCondition,
michael@0	189	nsIURI* aDocURL,
michael@0	190	nsIURI* aBaseURL,
michael@0	191	nsIPrincipal* aDocPrincipal);
michael@0	192
michael@0	193	typedef nsCSSParser::VariableEnumFunc VariableEnumFunc;
michael@0	194
michael@0	195	/**
michael@0	196	* Parses a CSS token stream value and invokes a callback function for each
michael@0	197	* variable reference that is encountered.
michael@0	198	*
michael@0	199	* @param aPropertyValue The CSS token stream value.
michael@0	200	* @param aFunc The callback function to invoke; its parameters are the
michael@0	201	* variable name found and the aData argument passed in to this function.
michael@0	202	* @param aData User data to pass in to the callback.
michael@0	203	* @return Whether aPropertyValue could be parsed as a valid CSS token stream
michael@0	204	* value (e.g., without syntactic errors in variable references).
michael@0	205	*/
michael@0	206	bool EnumerateVariableReferences(const nsAString& aPropertyValue,
michael@0	207	VariableEnumFunc aFunc,
michael@0	208	void* aData);
michael@0	209
michael@0	210	/**
michael@0	211	* Parses aPropertyValue as a CSS token stream value and resolves any
michael@0	212	* variable references using the variables in aVariables.
michael@0	213	*
michael@0	214	* @param aPropertyValue The CSS token stream value.
michael@0	215	* @param aVariables The set of variable values to use when resolving variable
michael@0	216	* references.
michael@0	217	* @param aResult Out parameter that gets the resolved value.
michael@0	218	* @param aFirstToken Out parameter that gets the type of the first token in
michael@0	219	* aResult.
michael@0	220	* @param aLastToken Out parameter that gets the type of the last token in
michael@0	221	* aResult.
michael@0	222	* @return Whether aResult could be parsed successfully and variable reference
michael@0	223	* substitution succeeded.
michael@0	224	*/
michael@0	225	bool ResolveVariableValue(const nsAString& aPropertyValue,
michael@0	226	const CSSVariableValues* aVariables,
michael@0	227	nsString& aResult,
michael@0	228	nsCSSTokenSerializationType& aFirstToken,
michael@0	229	nsCSSTokenSerializationType& aLastToken);
michael@0	230
michael@0	231	/**
michael@0	232	* Parses a string as a CSS token stream value for particular property,
michael@0	233	* resolving any variable references. The parsed property value is stored
michael@0	234	* in the specified nsRuleData object. If aShorthandPropertyID has a value
michael@0	235	* other than eCSSProperty_UNKNOWN, this is the property that will be parsed;
michael@0	236	* otherwise, aPropertyID will be parsed. Either way, only aPropertyID,
michael@0	237	* a longhand property, will be copied over to the rule data.
michael@0	238	*
michael@0	239	* If the property cannot be parsed, it will be treated as if 'initial' or
michael@0	240	* 'inherit' were specified, for non-inherited and inherited properties
michael@0	241	* respectively.
michael@0	242	*
michael@0	243	* @param aPropertyID The ID of the longhand property whose value is to be
michael@0	244	* copied to the rule data.
michael@0	245	* @param aShorthandPropertyID The ID of the shorthand property to be parsed.
michael@0	246	* If a longhand property is to be parsed, aPropertyID is that property,
michael@0	247	* and aShorthandPropertyID must be eCSSProperty_UNKNOWN.
michael@0	248	* @param aValue The CSS token stream value.
michael@0	249	* @param aVariables The set of variable values to use when resolving variable
michael@0	250	* references.
michael@0	251	* @param aRuleData The rule data object into which parsed property value for
michael@0	252	* aPropertyID will be stored.
michael@0	253	*/
michael@0	254	void ParsePropertyWithVariableReferences(nsCSSProperty aPropertyID,
michael@0	255	nsCSSProperty aShorthandPropertyID,
michael@0	256	const nsAString& aValue,
michael@0	257	const CSSVariableValues* aVariables,
michael@0	258	nsRuleData* aRuleData,
michael@0	259	nsIURI* aDocURL,
michael@0	260	nsIURI* aBaseURL,
michael@0	261	nsIPrincipal* aDocPrincipal,
michael@0	262	nsCSSStyleSheet* aSheet,
michael@0	263	uint32_t aLineNumber,
michael@0	264	uint32_t aLineOffset);
michael@0	265
michael@0	266	nsCSSProperty LookupEnabledProperty(const nsAString& aProperty) {
michael@0	267	static_assert(nsCSSProps::eEnabledForAllContent == 0,
michael@0	268	"nsCSSProps::eEnabledForAllContent should be zero for "
michael@0	269	"this bitfield to work");
michael@0	270	nsCSSProps::EnabledState enabledState = nsCSSProps::eEnabledForAllContent;
michael@0	271	if (mUnsafeRulesEnabled) {
michael@0	272	enabledState |= nsCSSProps::eEnabledInUASheets;
michael@0	273	}
michael@0	274	if (mIsChromeOrCertifiedApp) {
michael@0	275	enabledState |= nsCSSProps::eEnabledInChromeOrCertifiedApp;
michael@0	276	}
michael@0	277	return nsCSSProps::LookupProperty(aProperty, enabledState);
michael@0	278	}
michael@0	279
michael@0	280	protected:
michael@0	281	class nsAutoParseCompoundProperty;
michael@0	282	friend class nsAutoParseCompoundProperty;
michael@0	283
michael@0	284	class nsAutoFailingSupportsRule;
michael@0	285	friend class nsAutoFailingSupportsRule;
michael@0	286
michael@0	287	class nsAutoSuppressErrors;
michael@0	288	friend class nsAutoSuppressErrors;
michael@0	289
michael@0	290	void AppendRule(css::Rule* aRule);
michael@0	291	friend void AppendRuleToSheet(css::Rule*, void*); // calls AppendRule
michael@0	292
michael@0	293	/**
michael@0	294	* This helper class automatically calls SetParsingCompoundProperty in its
michael@0	295	* constructor and takes care of resetting it to false in its destructor.
michael@0	296	*/
michael@0	297	class nsAutoParseCompoundProperty {
michael@0	298	public:
michael@0	299	nsAutoParseCompoundProperty(CSSParserImpl* aParser) : mParser(aParser)
michael@0	300	{
michael@0	301	NS_ASSERTION(!aParser->IsParsingCompoundProperty(),
michael@0	302	"already parsing compound property");
michael@0	303	NS_ASSERTION(aParser, "Null parser?");
michael@0	304	aParser->SetParsingCompoundProperty(true);
michael@0	305	}
michael@0	306
michael@0	307	~nsAutoParseCompoundProperty()
michael@0	308	{
michael@0	309	mParser->SetParsingCompoundProperty(false);
michael@0	310	}
michael@0	311	private:
michael@0	312	CSSParserImpl* mParser;
michael@0	313	};
michael@0	314
michael@0	315	/**
michael@0	316	* This helper class conditionally sets mInFailingSupportsRule to
michael@0	317	* true if aCondition = false, and resets it to its original value in its
michael@0	318	* destructor. If we are already somewhere within a failing @supports
michael@0	319	* rule, passing in aCondition = true does not change mInFailingSupportsRule.
michael@0	320	*/
michael@0	321	class nsAutoFailingSupportsRule {
michael@0	322	public:
michael@0	323	nsAutoFailingSupportsRule(CSSParserImpl* aParser,
michael@0	324	bool aCondition)
michael@0	325	: mParser(aParser),
michael@0	326	mOriginalValue(aParser->mInFailingSupportsRule)
michael@0	327	{
michael@0	328	if (!aCondition) {
michael@0	329	mParser->mInFailingSupportsRule = true;
michael@0	330	}
michael@0	331	}
michael@0	332
michael@0	333	~nsAutoFailingSupportsRule()
michael@0	334	{
michael@0	335	mParser->mInFailingSupportsRule = mOriginalValue;
michael@0	336	}
michael@0	337
michael@0	338	private:
michael@0	339	CSSParserImpl* mParser;
michael@0	340	bool mOriginalValue;
michael@0	341	};
michael@0	342
michael@0	343	/**
michael@0	344	* Auto class to set aParser->mSuppressErrors to the specified value
michael@0	345	* and restore it to its original value later.
michael@0	346	*/
michael@0	347	class nsAutoSuppressErrors {
michael@0	348	public:
michael@0	349	nsAutoSuppressErrors(CSSParserImpl* aParser,
michael@0	350	bool aSuppressErrors = true)
michael@0	351	: mParser(aParser),
michael@0	352	mOriginalValue(aParser->mSuppressErrors)
michael@0	353	{
michael@0	354	mParser->mSuppressErrors = aSuppressErrors;
michael@0	355	}
michael@0	356
michael@0	357	~nsAutoSuppressErrors()
michael@0	358	{
michael@0	359	mParser->mSuppressErrors = mOriginalValue;
michael@0	360	}
michael@0	361
michael@0	362	private:
michael@0	363	CSSParserImpl* mParser;
michael@0	364	bool mOriginalValue;
michael@0	365	};
michael@0	366
michael@0	367	// the caller must hold on to aString until parsing is done
michael@0	368	void InitScanner(nsCSSScanner& aScanner,
michael@0	369	css::ErrorReporter& aReporter,
michael@0	370	nsIURI* aSheetURI, nsIURI* aBaseURI,
michael@0	371	nsIPrincipal* aSheetPrincipal);
michael@0	372	void ReleaseScanner(void);
michael@0	373	bool IsSVGMode() const {
michael@0	374	return mScanner->IsSVGMode();
michael@0	375	}
michael@0	376
michael@0	377	/**
michael@0	378	* Saves the current input state, which includes any currently pushed
michael@0	379	* back token, and the current position of the scanner.
michael@0	380	*/
michael@0	381	void SaveInputState(CSSParserInputState& aState);
michael@0	382
michael@0	383	/**
michael@0	384	* Restores the saved input state by pushing back any saved pushback
michael@0	385	* token and calling RestoreSavedPosition on the scanner.
michael@0	386	*/
michael@0	387	void RestoreSavedInputState(const CSSParserInputState& aState);
michael@0	388
michael@0	389	bool GetToken(bool aSkipWS);
michael@0	390	void UngetToken();
michael@0	391	bool GetNextTokenLocation(bool aSkipWS, uint32_t *linenum, uint32_t *colnum);
michael@0	392
michael@0	393	bool ExpectSymbol(char16_t aSymbol, bool aSkipWS);
michael@0	394	bool ExpectEndProperty();
michael@0	395	bool CheckEndProperty();
michael@0	396	nsSubstring* NextIdent();
michael@0	397
michael@0	398	// returns true when the stop symbol is found, and false for EOF
michael@0	399	bool SkipUntil(char16_t aStopSymbol);
michael@0	400	void SkipUntilOneOf(const char16_t* aStopSymbolChars);
michael@0	401	// For each character in aStopSymbolChars from the end of the array
michael@0	402	// to the start, calls SkipUntil with that character.
michael@0	403	typedef nsAutoTArray<char16_t, 16> StopSymbolCharStack;
michael@0	404	void SkipUntilAllOf(const StopSymbolCharStack& aStopSymbolChars);
michael@0	405	// returns true if the stop symbol or EOF is found, and false for an
michael@0	406	// unexpected ')', ']' or '}'; this not safe to call outside variable
michael@0	407	// resolution, as it doesn't handle mismatched content
michael@0	408	bool SkipBalancedContentUntil(char16_t aStopSymbol);
michael@0	409
michael@0	410	void SkipRuleSet(bool aInsideBraces);
michael@0	411	bool SkipAtRule(bool aInsideBlock);
michael@0	412	bool SkipDeclaration(bool aCheckForBraces);
michael@0	413
michael@0	414	void PushGroup(css::GroupRule* aRule);
michael@0	415	void PopGroup();
michael@0	416
michael@0	417	bool ParseRuleSet(RuleAppendFunc aAppendFunc, void* aProcessData,
michael@0	418	bool aInsideBraces = false);
michael@0	419	bool ParseAtRule(RuleAppendFunc aAppendFunc, void* aProcessData,
michael@0	420	bool aInAtRule);
michael@0	421	bool ParseCharsetRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	422	bool ParseImportRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	423	bool ParseURLOrString(nsString& aURL);
michael@0	424	bool GatherMedia(nsMediaList* aMedia,
michael@0	425	bool aInAtRule);
michael@0	426	bool ParseMediaQuery(bool aInAtRule, nsMediaQuery **aQuery,
michael@0	427	bool *aHitStop);
michael@0	428	bool ParseMediaQueryExpression(nsMediaQuery* aQuery);
michael@0	429	void ProcessImport(const nsString& aURLSpec,
michael@0	430	nsMediaList* aMedia,
michael@0	431	RuleAppendFunc aAppendFunc,
michael@0	432	void* aProcessData);
michael@0	433	bool ParseGroupRule(css::GroupRule* aRule, RuleAppendFunc aAppendFunc,
michael@0	434	void* aProcessData);
michael@0	435	bool ParseMediaRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	436	bool ParseMozDocumentRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	437	bool ParseNameSpaceRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	438	void ProcessNameSpace(const nsString& aPrefix,
michael@0	439	const nsString& aURLSpec, RuleAppendFunc aAppendFunc,
michael@0	440	void* aProcessData);
michael@0	441
michael@0	442	bool ParseFontFaceRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	443	bool ParseFontFeatureValuesRule(RuleAppendFunc aAppendFunc,
michael@0	444	void* aProcessData);
michael@0	445	bool ParseFontFeatureValueSet(nsCSSFontFeatureValuesRule *aRule);
michael@0	446	bool ParseFontDescriptor(nsCSSFontFaceRule* aRule);
michael@0	447	bool ParseFontDescriptorValue(nsCSSFontDesc aDescID,
michael@0	448	nsCSSValue& aValue);
michael@0	449
michael@0	450	bool ParsePageRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	451	bool ParseKeyframesRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	452	already_AddRefed<nsCSSKeyframeRule> ParseKeyframeRule();
michael@0	453	bool ParseKeyframeSelectorList(InfallibleTArray<float>& aSelectorList);
michael@0	454
michael@0	455	bool ParseSupportsRule(RuleAppendFunc aAppendFunc, void* aProcessData);
michael@0	456	bool ParseSupportsCondition(bool& aConditionMet);
michael@0	457	bool ParseSupportsConditionNegation(bool& aConditionMet);
michael@0	458	bool ParseSupportsConditionInParens(bool& aConditionMet);
michael@0	459	bool ParseSupportsConditionInParensInsideParens(bool& aConditionMet);
michael@0	460	bool ParseSupportsConditionTerms(bool& aConditionMet);
michael@0	461	enum SupportsConditionTermOperator { eAnd, eOr };
michael@0	462	bool ParseSupportsConditionTermsAfterOperator(
michael@0	463	bool& aConditionMet,
michael@0	464	SupportsConditionTermOperator aOperator);
michael@0	465
michael@0	466	/**
michael@0	467	* Parses the current input stream for a CSS token stream value and resolves
michael@0	468	* any variable references using the variables in aVariables.
michael@0	469	*
michael@0	470	* @param aVariables The set of variable values to use when resolving variable
michael@0	471	* references.
michael@0	472	* @param aResult Out parameter that, if the function returns true, will be
michael@0	473	* replaced with the resolved value.
michael@0	474	* @return Whether aResult could be parsed successfully and variable reference
michael@0	475	* substitution succeeded.
michael@0	476	*/
michael@0	477	bool ResolveValueWithVariableReferences(
michael@0	478	const CSSVariableValues* aVariables,
michael@0	479	nsString& aResult,
michael@0	480	nsCSSTokenSerializationType& aResultFirstToken,
michael@0	481	nsCSSTokenSerializationType& aResultLastToken);
michael@0	482	// Helper function for ResolveValueWithVariableReferences.
michael@0	483	bool ResolveValueWithVariableReferencesRec(
michael@0	484	nsString& aResult,
michael@0	485	nsCSSTokenSerializationType& aResultFirstToken,
michael@0	486	nsCSSTokenSerializationType& aResultLastToken,
michael@0	487	const CSSVariableValues* aVariables);
michael@0	488
michael@0	489	enum nsSelectorParsingStatus {
michael@0	490	// we have parsed a selector and we saw a token that cannot be
michael@0	491	// part of a selector:
michael@0	492	eSelectorParsingStatus_Done,
michael@0	493	// we should continue parsing the selector:
michael@0	494	eSelectorParsingStatus_Continue,
michael@0	495	// we saw an unexpected token or token value,
michael@0	496	// or we saw end-of-file with an unfinished selector:
michael@0	497	eSelectorParsingStatus_Error
michael@0	498	};
michael@0	499	nsSelectorParsingStatus ParseIDSelector(int32_t& aDataMask,
michael@0	500	nsCSSSelector& aSelector);
michael@0	501
michael@0	502	nsSelectorParsingStatus ParseClassSelector(int32_t& aDataMask,
michael@0	503	nsCSSSelector& aSelector);
michael@0	504
michael@0	505	// aPseudoElement and aPseudoElementArgs are the location where
michael@0	506	// pseudo-elements (as opposed to pseudo-classes) are stored;
michael@0	507	// pseudo-classes are stored on aSelector. aPseudoElement and
michael@0	508	// aPseudoElementArgs must be non-null iff !aIsNegated.
michael@0	509	nsSelectorParsingStatus ParsePseudoSelector(int32_t& aDataMask,
michael@0	510	nsCSSSelector& aSelector,
michael@0	511	bool aIsNegated,
michael@0	512	nsIAtom** aPseudoElement,
michael@0	513	nsAtomList** aPseudoElementArgs,
michael@0	514	nsCSSPseudoElements::Type* aPseudoElementType);
michael@0	515
michael@0	516	nsSelectorParsingStatus ParseAttributeSelector(int32_t& aDataMask,
michael@0	517	nsCSSSelector& aSelector);
michael@0	518
michael@0	519	nsSelectorParsingStatus ParseTypeOrUniversalSelector(int32_t& aDataMask,
michael@0	520	nsCSSSelector& aSelector,
michael@0	521	bool aIsNegated);
michael@0	522
michael@0	523	nsSelectorParsingStatus ParsePseudoClassWithIdentArg(nsCSSSelector& aSelector,
michael@0	524	nsCSSPseudoClasses::Type aType);
michael@0	525
michael@0	526	nsSelectorParsingStatus ParsePseudoClassWithNthPairArg(nsCSSSelector& aSelector,
michael@0	527	nsCSSPseudoClasses::Type aType);
michael@0	528
michael@0	529	nsSelectorParsingStatus ParsePseudoClassWithSelectorListArg(nsCSSSelector& aSelector,
michael@0	530	nsCSSPseudoClasses::Type aType);
michael@0	531
michael@0	532	nsSelectorParsingStatus ParseNegatedSimpleSelector(int32_t& aDataMask,
michael@0	533	nsCSSSelector& aSelector);
michael@0	534
michael@0	535	// If aStopChar is non-zero, the selector list is done when we hit
michael@0	536	// aStopChar. Otherwise, it's done when we hit EOF.
michael@0	537	bool ParseSelectorList(nsCSSSelectorList*& aListHead,
michael@0	538	char16_t aStopChar);
michael@0	539	bool ParseSelectorGroup(nsCSSSelectorList*& aListHead);
michael@0	540	bool ParseSelector(nsCSSSelectorList* aList, char16_t aPrevCombinator);
michael@0	541
michael@0	542	enum {
michael@0	543	eParseDeclaration_InBraces = 1 << 0,
michael@0	544	eParseDeclaration_AllowImportant = 1 << 1
michael@0	545	};
michael@0	546	enum nsCSSContextType {
michael@0	547	eCSSContext_General,
michael@0	548	eCSSContext_Page
michael@0	549	};
michael@0	550
michael@0	551	css::Declaration* ParseDeclarationBlock(uint32_t aFlags,
michael@0	552	nsCSSContextType aContext = eCSSContext_General);
michael@0	553	bool ParseDeclaration(css::Declaration* aDeclaration,
michael@0	554	uint32_t aFlags,
michael@0	555	bool aMustCallValueAppended,
michael@0	556	bool* aChanged,
michael@0	557	nsCSSContextType aContext = eCSSContext_General);
michael@0	558
michael@0	559	bool ParseProperty(nsCSSProperty aPropID);
michael@0	560	bool ParsePropertyByFunction(nsCSSProperty aPropID);
michael@0	561	bool ParseSingleValueProperty(nsCSSValue& aValue,
michael@0	562	nsCSSProperty aPropID);
michael@0	563
michael@0	564	enum PriorityParsingStatus {
michael@0	565	ePriority_None,
michael@0	566	ePriority_Important,
michael@0	567	ePriority_Error
michael@0	568	};
michael@0	569	PriorityParsingStatus ParsePriority();
michael@0	570
michael@0	571	#ifdef MOZ_XUL
michael@0	572	bool ParseTreePseudoElement(nsAtomList **aPseudoElementArgs);
michael@0	573	#endif
michael@0	574
michael@0	575	void InitBoxPropsAsPhysical(const nsCSSProperty *aSourceProperties);
michael@0	576
michael@0	577	// Property specific parsing routines
michael@0	578	bool ParseBackground();
michael@0	579
michael@0	580	struct BackgroundParseState {
michael@0	581	nsCSSValue& mColor;
michael@0	582	nsCSSValueList* mImage;
michael@0	583	nsCSSValuePairList* mRepeat;
michael@0	584	nsCSSValueList* mAttachment;
michael@0	585	nsCSSValueList* mClip;
michael@0	586	nsCSSValueList* mOrigin;
michael@0	587	nsCSSValueList* mPosition;
michael@0	588	nsCSSValuePairList* mSize;
michael@0	589	BackgroundParseState(
michael@0	590	nsCSSValue& aColor, nsCSSValueList* aImage, nsCSSValuePairList* aRepeat,
michael@0	591	nsCSSValueList* aAttachment, nsCSSValueList* aClip,
michael@0	592	nsCSSValueList* aOrigin, nsCSSValueList* aPosition,
michael@0	593	nsCSSValuePairList* aSize) :
michael@0	594	mColor(aColor), mImage(aImage), mRepeat(aRepeat),
michael@0	595	mAttachment(aAttachment), mClip(aClip), mOrigin(aOrigin),
michael@0	596	mPosition(aPosition), mSize(aSize) {};
michael@0	597	};
michael@0	598
michael@0	599	bool ParseBackgroundItem(BackgroundParseState& aState);
michael@0	600
michael@0	601	bool ParseValueList(nsCSSProperty aPropID); // a single value prop-id
michael@0	602	bool ParseBackgroundRepeat();
michael@0	603	bool ParseBackgroundRepeatValues(nsCSSValuePair& aValue);
michael@0	604	bool ParseBackgroundPosition();
michael@0	605
michael@0	606	// ParseBoxPositionValues parses the CSS 2.1 background-position syntax,
michael@0	607	// which is still used by some properties. See ParseBackgroundPositionValues
michael@0	608	// for the css3-background syntax.
michael@0	609	bool ParseBoxPositionValues(nsCSSValuePair& aOut, bool aAcceptsInherit,
michael@0	610	bool aAllowExplicitCenter = true); // deprecated
michael@0	611	bool ParseBackgroundPositionValues(nsCSSValue& aOut, bool aAcceptsInherit);
michael@0	612
michael@0	613	bool ParseBackgroundSize();
michael@0	614	bool ParseBackgroundSizeValues(nsCSSValuePair& aOut);
michael@0	615	bool ParseBorderColor();
michael@0	616	bool ParseBorderColors(nsCSSProperty aProperty);
michael@0	617	void SetBorderImageInitialValues();
michael@0	618	bool ParseBorderImageRepeat(bool aAcceptsInherit);
michael@0	619	// If ParseBorderImageSlice returns false, aConsumedTokens indicates
michael@0	620	// whether or not any tokens were consumed (in other words, was the property
michael@0	621	// in error or just not present). If ParseBorderImageSlice returns true
michael@0	622	// aConsumedTokens is always true.
michael@0	623	bool ParseBorderImageSlice(bool aAcceptsInherit, bool* aConsumedTokens);
michael@0	624	bool ParseBorderImageWidth(bool aAcceptsInherit);
michael@0	625	bool ParseBorderImageOutset(bool aAcceptsInherit);
michael@0	626	bool ParseBorderImage();
michael@0	627	bool ParseBorderSpacing();
michael@0	628	bool ParseBorderSide(const nsCSSProperty aPropIDs[],
michael@0	629	bool aSetAllSides);
michael@0	630	bool ParseDirectionalBorderSide(const nsCSSProperty aPropIDs[],
michael@0	631	int32_t aSourceType);
michael@0	632	bool ParseBorderStyle();
michael@0	633	bool ParseBorderWidth();
michael@0	634
michael@0	635	bool ParseCalc(nsCSSValue &aValue, int32_t aVariantMask);
michael@0	636	bool ParseCalcAdditiveExpression(nsCSSValue& aValue,
michael@0	637	int32_t& aVariantMask);
michael@0	638	bool ParseCalcMultiplicativeExpression(nsCSSValue& aValue,
michael@0	639	int32_t& aVariantMask,
michael@0	640	bool *aHadFinalWS);
michael@0	641	bool ParseCalcTerm(nsCSSValue& aValue, int32_t& aVariantMask);
michael@0	642	bool RequireWhitespace();
michael@0	643
michael@0	644	// For "flex" shorthand property, defined in CSS Flexbox spec
michael@0	645	bool ParseFlex();
michael@0	646	// For "flex-flow" shorthand property, defined in CSS Flexbox spec
michael@0	647	bool ParseFlexFlow();
michael@0	648
michael@0	649	// CSS Grid
michael@0	650	bool ParseGridAutoFlow();
michael@0	651
michael@0	652	// Parse a <line-names> expression.
michael@0	653	// If successful, either leave aValue untouched,
michael@0	654	// to indicate that we parsed the empty list,
michael@0	655	// or set it to a eCSSUnit_List of eCSSUnit_Ident.
michael@0	656	//
michael@0	657	// To parse an optional <line-names> (ie. if not finding an open paren
michael@0	658	// is considered the same as an empty list),
michael@0	659	// treat CSSParseResult::NotFound the same as CSSParseResult::Ok.
michael@0	660	//
michael@0	661	// If aValue is already a eCSSUnit_List, append to that list.
michael@0	662	CSSParseResult ParseGridLineNames(nsCSSValue& aValue);
michael@0	663	bool ParseGridLineNameListRepeat(nsCSSValueList** aTailPtr);
michael@0	664	bool ParseOptionalLineNameListAfterSubgrid(nsCSSValue& aValue);
michael@0	665	bool ParseGridTrackBreadth(nsCSSValue& aValue);
michael@0	666	CSSParseResult ParseGridTrackSize(nsCSSValue& aValue);
michael@0	667	bool ParseGridAutoColumnsRows(nsCSSProperty aPropID);
michael@0	668	bool ParseGridTrackListRepeat(nsCSSValueList** aTailPtr);
michael@0	669
michael@0	670	// Assuming a [ <line-names>? ] has already been parsed,
michael@0	671	// parse the rest of a <track-list>.
michael@0	672	//
michael@0	673	// This exists because [ <line-names>? ] is ambiguous in the
michael@0	674	// 'grid-template' shorthand: it can be either the start of a <track-list>,
michael@0	675	// or of the intertwined syntax that sets both
michael@0	676	// grid-template-rows and grid-template-areas.
michael@0	677	//
michael@0	678	// On success, |aValue| will be a list of odd length >= 3,
michael@0	679	// starting with a <line-names> (which is itself a list)
michael@0	680	// and alternating between that and <track-size>.
michael@0	681	bool ParseGridTrackListWithFirstLineNames(nsCSSValue& aValue,
michael@0	682	const nsCSSValue& aFirstLineNames);
michael@0	683	bool ParseGridTemplateColumnsRows(nsCSSProperty aPropID);
michael@0	684
michael@0	685	// |aAreaIndices| is a lookup table to help us parse faster,
michael@0	686	// mapping area names to indices in |aResult.mNamedAreas|.
michael@0	687	bool ParseGridTemplateAreasLine(const nsAutoString& aInput,
michael@0	688	css::GridTemplateAreasValue* aResult,
michael@0	689	nsDataHashtable<nsStringHashKey, uint32_t>& aAreaIndices);
michael@0	690	bool ParseGridTemplateAreas();
michael@0	691	bool ParseGridTemplate();
michael@0	692	bool ParseGridTemplateAfterSlash(bool aColumnsIsTrackList);
michael@0	693	bool ParseGridTemplateAfterString(const nsCSSValue& aFirstLineNames);
michael@0	694	bool ParseGrid();
michael@0	695	bool ParseGridShorthandAutoProps();
michael@0	696	bool ParseGridLine(nsCSSValue& aValue);
michael@0	697	bool ParseGridAutoPosition();
michael@0	698	bool ParseGridColumnRowStartEnd(nsCSSProperty aPropID);
michael@0	699	bool ParseGridColumnRow(nsCSSProperty aStartPropID,
michael@0	700	nsCSSProperty aEndPropID);
michael@0	701	bool ParseGridArea();
michael@0	702
michael@0	703	// for 'clip' and '-moz-image-region'
michael@0	704	bool ParseRect(nsCSSProperty aPropID);
michael@0	705	bool ParseColumns();
michael@0	706	bool ParseContent();
michael@0	707	bool ParseCounterData(nsCSSProperty aPropID);
michael@0	708	bool ParseCursor();
michael@0	709	bool ParseFont();
michael@0	710	bool ParseFontSynthesis(nsCSSValue& aValue);
michael@0	711	bool ParseSingleAlternate(int32_t& aWhichFeature, nsCSSValue& aValue);
michael@0	712	bool ParseFontVariantAlternates(nsCSSValue& aValue);
michael@0	713	bool ParseBitmaskValues(nsCSSValue& aValue,
michael@0	714	const KTableValue aKeywordTable[],
michael@0	715	const int32_t aMasks[]);
michael@0	716	bool ParseFontVariantEastAsian(nsCSSValue& aValue);
michael@0	717	bool ParseFontVariantLigatures(nsCSSValue& aValue);
michael@0	718	bool ParseFontVariantNumeric(nsCSSValue& aValue);
michael@0	719	bool ParseFontWeight(nsCSSValue& aValue);
michael@0	720	bool ParseOneFamily(nsAString& aFamily, bool& aOneKeyword);
michael@0	721	bool ParseFamily(nsCSSValue& aValue);
michael@0	722	bool ParseFontFeatureSettings(nsCSSValue& aValue);
michael@0	723	bool ParseFontSrc(nsCSSValue& aValue);
michael@0	724	bool ParseFontSrcFormat(InfallibleTArray<nsCSSValue>& values);
michael@0	725	bool ParseFontRanges(nsCSSValue& aValue);
michael@0	726	bool ParseListStyle();
michael@0	727	bool ParseMargin();
michael@0	728	bool ParseMarks(nsCSSValue& aValue);
michael@0	729	bool ParseTransform(bool aIsPrefixed);
michael@0	730	bool ParseOutline();
michael@0	731	bool ParseOverflow();
michael@0	732	bool ParsePadding();
michael@0	733	bool ParseQuotes();
michael@0	734	bool ParseSize();
michael@0	735	bool ParseTextAlign(nsCSSValue& aValue,
michael@0	736	const KTableValue aTable[]);
michael@0	737	bool ParseTextAlign(nsCSSValue& aValue);
michael@0	738	bool ParseTextAlignLast(nsCSSValue& aValue);
michael@0	739	bool ParseTextDecoration();
michael@0	740	bool ParseTextDecorationLine(nsCSSValue& aValue);
michael@0	741	bool ParseTextCombineUpright(nsCSSValue& aValue);
michael@0	742	bool ParseTextOverflow(nsCSSValue& aValue);
michael@0	743	bool ParseTouchAction(nsCSSValue& aValue);
michael@0	744
michael@0	745	bool ParseShadowItem(nsCSSValue& aValue, bool aIsBoxShadow);
michael@0	746	bool ParseShadowList(nsCSSProperty aProperty);
michael@0	747	bool ParseTransitionProperty();
michael@0	748	bool ParseTransitionTimingFunctionValues(nsCSSValue& aValue);
michael@0	749	bool ParseTransitionTimingFunctionValueComponent(float& aComponent,
michael@0	750	char aStop,
michael@0	751	bool aCheckRange);
michael@0	752	bool ParseTransitionStepTimingFunctionValues(nsCSSValue& aValue);
michael@0	753	enum ParseAnimationOrTransitionShorthandResult {
michael@0	754	eParseAnimationOrTransitionShorthand_Values,
michael@0	755	eParseAnimationOrTransitionShorthand_Inherit,
michael@0	756	eParseAnimationOrTransitionShorthand_Error
michael@0	757	};
michael@0	758	ParseAnimationOrTransitionShorthandResult
michael@0	759	ParseAnimationOrTransitionShorthand(const nsCSSProperty* aProperties,
michael@0	760	const nsCSSValue* aInitialValues,
michael@0	761	nsCSSValue* aValues,
michael@0	762	size_t aNumProperties);
michael@0	763	bool ParseTransition();
michael@0	764	bool ParseAnimation();
michael@0	765	bool ParseWillChange();
michael@0	766
michael@0	767	bool ParsePaint(nsCSSProperty aPropID);
michael@0	768	bool ParseDasharray();
michael@0	769	bool ParseMarker();
michael@0	770	bool ParsePaintOrder();
michael@0	771	bool ParseAll();
michael@0	772
michael@0	773	/**
michael@0	774	* Parses a variable value from a custom property declaration.
michael@0	775	*
michael@0	776	* @param aType Out parameter into which will be stored the type of variable
michael@0	777	* value, indicating whether the parsed value was a token stream or one of
michael@0	778	* the CSS-wide keywords.
michael@0	779	* @param aValue Out parameter into which will be stored the token stream
michael@0	780	* as a string, if the parsed custom property did take a token stream.
michael@0	781	* @return Whether parsing succeeded.
michael@0	782	*/
michael@0	783	bool ParseVariableDeclaration(CSSVariableDeclarations::Type* aType,
michael@0	784	nsString& aValue);
michael@0	785
michael@0	786	/**
michael@0	787	* Parses a CSS variable value. This could be 'initial', 'inherit', 'unset'
michael@0	788	* or a token stream, which may or may not include variable references.
michael@0	789	*
michael@0	790	* @param aType Out parameter into which the type of the variable value
michael@0	791	* will be stored.
michael@0	792	* @param aDropBackslash Out parameter indicating whether during variable
michael@0	793	* value parsing there was a trailing backslash before EOF that must
michael@0	794	* be dropped when serializing the variable value.
michael@0	795	* @param aImpliedCharacters Out parameter appended to which will be any
michael@0	796	* characters that were implied when encountering EOF and which
michael@0	797	* must be included at the end of the serialized variable value.
michael@0	798	* @param aFunc A callback function to invoke when a variable reference
michael@0	799	* is encountered. May be null. Arguments are the variable name
michael@0	800	* and the aData argument passed in to this function.
michael@0	801	* @param User data to pass in to the callback.
michael@0	802	* @return Whether parsing succeeded.
michael@0	803	*/
michael@0	804	bool ParseValueWithVariables(CSSVariableDeclarations::Type* aType,
michael@0	805	bool* aDropBackslash,
michael@0	806	nsString& aImpliedCharacters,
michael@0	807	void (*aFunc)(const nsAString&, void*),
michael@0	808	void* aData);
michael@0	809
michael@0	810	/**
michael@0	811	* Returns whether the scanner dropped a backslash just before EOF.
michael@0	812	*/
michael@0	813	bool BackslashDropped();
michael@0	814
michael@0	815	/**
michael@0	816	* Calls AppendImpliedEOFCharacters on mScanner.
michael@0	817	*/
michael@0	818	void AppendImpliedEOFCharacters(nsAString& aResult);
michael@0	819
michael@0	820	// Reused utility parsing routines
michael@0	821	void AppendValue(nsCSSProperty aPropID, const nsCSSValue& aValue);
michael@0	822	bool ParseBoxProperties(const nsCSSProperty aPropIDs[]);
michael@0	823	bool ParseGroupedBoxProperty(int32_t aVariantMask,
michael@0	824	nsCSSValue& aValue);
michael@0	825	bool ParseDirectionalBoxProperty(nsCSSProperty aProperty,
michael@0	826	int32_t aSourceType);
michael@0	827	bool ParseBoxCornerRadius(const nsCSSProperty aPropID);
michael@0	828	bool ParseBoxCornerRadii(const nsCSSProperty aPropIDs[]);
michael@0	829	int32_t ParseChoice(nsCSSValue aValues[],
michael@0	830	const nsCSSProperty aPropIDs[], int32_t aNumIDs);
michael@0	831	bool ParseColor(nsCSSValue& aValue);
michael@0	832	bool ParseNumberColorComponent(uint8_t& aComponent, char aStop);
michael@0	833	bool ParsePercentageColorComponent(float& aComponent, char aStop);
michael@0	834	// ParseHSLColor parses everything starting with the opening '('
michael@0	835	// up through and including the aStop char.
michael@0	836	bool ParseHSLColor(float& aHue, float& aSaturation, float& aLightness,
michael@0	837	char aStop);
michael@0	838	// ParseColorOpacity will enforce that the color ends with a ')'
michael@0	839	// after the opacity
michael@0	840	bool ParseColorOpacity(uint8_t& aOpacity);
michael@0	841	bool ParseColorOpacity(float& aOpacity);
michael@0	842	bool ParseEnum(nsCSSValue& aValue,
michael@0	843	const KTableValue aKeywordTable[]);
michael@0	844	bool ParseVariant(nsCSSValue& aValue,
michael@0	845	int32_t aVariantMask,
michael@0	846	const KTableValue aKeywordTable[]);
michael@0	847	bool ParseNonNegativeVariant(nsCSSValue& aValue,
michael@0	848	int32_t aVariantMask,
michael@0	849	const KTableValue aKeywordTable[]);
michael@0	850	bool ParseOneOrLargerVariant(nsCSSValue& aValue,
michael@0	851	int32_t aVariantMask,
michael@0	852	const KTableValue aKeywordTable[]);
michael@0	853
michael@0	854	// http://dev.w3.org/csswg/css-values/#custom-idents
michael@0	855	// Parse an identifier that is none of:
michael@0	856	// * a CSS-wide keyword
michael@0	857	// * "default"
michael@0	858	// * a keyword in |aExcludedKeywords|
michael@0	859	// * a keyword in |aPropertyKTable|
michael@0	860	//
michael@0	861	// |aExcludedKeywords| is an array of nsCSSKeyword
michael@0	862	// that ends with a eCSSKeyword_UNKNOWN marker.
michael@0	863	//
michael@0	864	// |aPropertyKTable| can be used if some of the keywords to exclude
michael@0	865	// also appear in an existing nsCSSProps::KTableValue,
michael@0	866	// to avoid duplicating them.
michael@0	867	bool ParseCustomIdent(nsCSSValue& aValue,
michael@0	868	const nsAutoString& aIdentValue,
michael@0	869	const nsCSSKeyword aExcludedKeywords[] = nullptr,
michael@0	870	const nsCSSProps::KTableValue aPropertyKTable[] = nullptr);
michael@0	871	bool ParseCounter(nsCSSValue& aValue);
michael@0	872	bool ParseAttr(nsCSSValue& aValue);
michael@0	873	bool SetValueToURL(nsCSSValue& aValue, const nsString& aURL);
michael@0	874	bool TranslateDimension(nsCSSValue& aValue, int32_t aVariantMask,
michael@0	875	float aNumber, const nsString& aUnit);
michael@0	876	bool ParseImageOrientation(nsCSSValue& aAngle);
michael@0	877	bool ParseImageRect(nsCSSValue& aImage);
michael@0	878	bool ParseElement(nsCSSValue& aValue);
michael@0	879	bool ParseColorStop(nsCSSValueGradient* aGradient);
michael@0	880	bool ParseLinearGradient(nsCSSValue& aValue, bool aIsRepeating,
michael@0	881	bool aIsLegacy);
michael@0	882	bool ParseRadialGradient(nsCSSValue& aValue, bool aIsRepeating,
michael@0	883	bool aIsLegacy);
michael@0	884	bool IsLegacyGradientLine(const nsCSSTokenType& aType,
michael@0	885	const nsString& aId);
michael@0	886	bool ParseGradientColorStops(nsCSSValueGradient* aGradient,
michael@0	887	nsCSSValue& aValue);
michael@0	888
michael@0	889	void SetParsingCompoundProperty(bool aBool) {
michael@0	890	mParsingCompoundProperty = aBool;
michael@0	891	}
michael@0	892	bool IsParsingCompoundProperty(void) const {
michael@0	893	return mParsingCompoundProperty;
michael@0	894	}
michael@0	895
michael@0	896	/* Functions for transform Parsing */
michael@0	897	bool ParseSingleTransform(bool aIsPrefixed, nsCSSValue& aValue);
michael@0	898	bool ParseFunction(nsCSSKeyword aFunction, const int32_t aAllowedTypes[],
michael@0	899	int32_t aVariantMaskAll, uint16_t aMinElems,
michael@0	900	uint16_t aMaxElems, nsCSSValue &aValue);
michael@0	901	bool ParseFunctionInternals(const int32_t aVariantMask[],
michael@0	902	int32_t aVariantMaskAll,
michael@0	903	uint16_t aMinElems,
michael@0	904	uint16_t aMaxElems,
michael@0	905	InfallibleTArray<nsCSSValue>& aOutput);
michael@0	906
michael@0	907	/* Functions for transform-origin/perspective-origin Parsing */
michael@0	908	bool ParseTransformOrigin(bool aPerspective);
michael@0	909
michael@0	910	/* Functions for filter parsing */
michael@0	911	bool ParseFilter();
michael@0	912	bool ParseSingleFilter(nsCSSValue* aValue);
michael@0	913	bool ParseDropShadow(nsCSSValue* aValue);
michael@0	914
michael@0	915	/* Find and return the namespace ID associated with aPrefix.
michael@0	916	If aPrefix has not been declared in an @namespace rule, returns
michael@0	917	kNameSpaceID_Unknown. */
michael@0	918	int32_t GetNamespaceIdForPrefix(const nsString& aPrefix);
michael@0	919
michael@0	920	/* Find the correct default namespace, and set it on aSelector. */
michael@0	921	void SetDefaultNamespaceOnSelector(nsCSSSelector& aSelector);
michael@0	922
michael@0	923	// Current token. The value is valid after calling GetToken and invalidated
michael@0	924	// by UngetToken.
michael@0	925	nsCSSToken mToken;
michael@0	926
michael@0	927	// Our scanner.
michael@0	928	nsCSSScanner* mScanner;
michael@0	929
michael@0	930	// Our error reporter.
michael@0	931	css::ErrorReporter* mReporter;
michael@0	932
michael@0	933	// The URI to be used as a base for relative URIs.
michael@0	934	nsCOMPtr<nsIURI> mBaseURI;
michael@0	935
michael@0	936	// The URI to be used as an HTTP "Referer" and for error reporting.
michael@0	937	nsCOMPtr<nsIURI> mSheetURI;
michael@0	938
michael@0	939	// The principal of the sheet involved
michael@0	940	nsCOMPtr<nsIPrincipal> mSheetPrincipal;
michael@0	941
michael@0	942	// The sheet we're parsing into
michael@0	943	nsRefPtr<nsCSSStyleSheet> mSheet;
michael@0	944
michael@0	945	// Used for @import rules
michael@0	946	mozilla::css::Loader* mChildLoader; // not ref counted, it owns us
michael@0	947
michael@0	948	// Sheet section we're in. This is used to enforce correct ordering of the
michael@0	949	// various rule types (eg the fact that a @charset rule must come before
michael@0	950	// anything else). Note that there are checks of similar things in various
michael@0	951	// places in nsCSSStyleSheet.cpp (e.g in insertRule, RebuildChildList).
michael@0	952	enum nsCSSSection {
michael@0	953	eCSSSection_Charset,
michael@0	954	eCSSSection_Import,
michael@0	955	eCSSSection_NameSpace,
michael@0	956	eCSSSection_General
michael@0	957	};
michael@0	958	nsCSSSection mSection;
michael@0	959
michael@0	960	nsXMLNameSpaceMap *mNameSpaceMap; // weak, mSheet owns it
michael@0	961
michael@0	962	// After an UngetToken is done this flag is true. The next call to
michael@0	963	// GetToken clears the flag.
michael@0	964	bool mHavePushBack : 1;
michael@0	965
michael@0	966	// True if we are in quirks mode; false in standards or almost standards mode
michael@0	967	bool mNavQuirkMode : 1;
michael@0	968
michael@0	969	// True when the hashless color quirk applies.
michael@0	970	bool mHashlessColorQuirk : 1;
michael@0	971
michael@0	972	// True when the unitless length quirk applies.
michael@0	973	bool mUnitlessLengthQuirk : 1;
michael@0	974
michael@0	975	// True if unsafe rules should be allowed
michael@0	976	bool mUnsafeRulesEnabled : 1;
michael@0	977
michael@0	978	// True if we are in parsing rules for Chrome or Certified App content,
michael@0	979	// in which case CSS properties with the
michael@0	980	// CSS_PROPERTY_ALWAYS_ENABLED_IN_CHROME_OR_CERTIFIED_APP
michael@0	981	// flag should be allowed.
michael@0	982	bool mIsChromeOrCertifiedApp : 1;
michael@0	983
michael@0	984	// True if viewport units should be allowed.
michael@0	985	bool mViewportUnitsEnabled : 1;
michael@0	986
michael@0	987	// True for parsing media lists for HTML attributes, where we have to
michael@0	988	// ignore CSS comments.
michael@0	989	bool mHTMLMediaMode : 1;
michael@0	990
michael@0	991	// This flag is set when parsing a non-box shorthand; it's used to not apply
michael@0	992	// some quirks during shorthand parsing
michael@0	993	bool mParsingCompoundProperty : 1;
michael@0	994
michael@0	995	// True if we are in the middle of parsing an @supports condition.
michael@0	996	// This is used to avoid recording the input stream when variable references
michael@0	997	// are encountered in a property declaration in the @supports condition.
michael@0	998	bool mInSupportsCondition : 1;
michael@0	999
michael@0	1000	// True if we are somewhere within a @supports rule whose condition is
michael@0	1001	// false.
michael@0	1002	bool mInFailingSupportsRule : 1;
michael@0	1003
michael@0	1004	// True if we will suppress all parse errors (except unexpected EOFs).
michael@0	1005	// This is used to prevent errors for declarations inside a failing
michael@0	1006	// @supports rule.
michael@0	1007	bool mSuppressErrors : 1;
michael@0	1008
michael@0	1009	// Stack of rule groups; used for @media and such.
michael@0	1010	InfallibleTArray<nsRefPtr<css::GroupRule> > mGroupStack;
michael@0	1011
michael@0	1012	// During the parsing of a property (which may be a shorthand), the data
michael@0	1013	// are stored in |mTempData|. (It is needed to ensure that parser
michael@0	1014	// errors cause the data to be ignored, and to ensure that a
michael@0	1015	// non-'!important' declaration does not override an '!important'
michael@0	1016	// one.)
michael@0	1017	nsCSSExpandedDataBlock mTempData;
michael@0	1018
michael@0	1019	// All data from successfully parsed properties are placed into |mData|.
michael@0	1020	nsCSSExpandedDataBlock mData;
michael@0	1021
michael@0	1022	public:
michael@0	1023	// Used from nsCSSParser constructors and destructors
michael@0	1024	CSSParserImpl* mNextFree;
michael@0	1025	};
michael@0	1026
michael@0	1027	static void AssignRuleToPointer(css::Rule* aRule, void* aPointer)
michael@0	1028	{
michael@0	1029	css::Rule **pointer = static_cast<css::Rule**>(aPointer);
michael@0	1030	NS_ADDREF(*pointer = aRule);
michael@0	1031	}
michael@0	1032
michael@0	1033	static void AppendRuleToSheet(css::Rule* aRule, void* aParser)
michael@0	1034	{
michael@0	1035	CSSParserImpl* parser = (CSSParserImpl*) aParser;
michael@0	1036	parser->AppendRule(aRule);
michael@0	1037	}
michael@0	1038
michael@0	1039	#define REPORT_UNEXPECTED(msg_) \
michael@0	1040	{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_); }
michael@0	1041
michael@0	1042	#define REPORT_UNEXPECTED_P(msg_, param_) \
michael@0	1043	{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_, param_); }
michael@0	1044
michael@0	1045	#define REPORT_UNEXPECTED_TOKEN(msg_) \
michael@0	1046	{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_, mToken); }
michael@0	1047
michael@0	1048	#define REPORT_UNEXPECTED_TOKEN_CHAR(msg_, ch_) \
michael@0	1049	{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_, mToken, ch_); }
michael@0	1050
michael@0	1051	#define REPORT_UNEXPECTED_EOF(lf_) \
michael@0	1052	mReporter->ReportUnexpectedEOF(#lf_)
michael@0	1053
michael@0	1054	#define REPORT_UNEXPECTED_EOF_CHAR(ch_) \
michael@0	1055	mReporter->ReportUnexpectedEOF(ch_)
michael@0	1056
michael@0	1057	#define OUTPUT_ERROR() \
michael@0	1058	mReporter->OutputError()
michael@0	1059
michael@0	1060	#define OUTPUT_ERROR_WITH_POSITION(linenum_, lineoff_) \
michael@0	1061	mReporter->OutputError(linenum_, lineoff_)
michael@0	1062
michael@0	1063	#define CLEAR_ERROR() \
michael@0	1064	mReporter->ClearError()
michael@0	1065
michael@0	1066	CSSParserImpl::CSSParserImpl()
michael@0	1067	: mToken(),
michael@0	1068	mScanner(nullptr),
michael@0	1069	mReporter(nullptr),
michael@0	1070	mChildLoader(nullptr),
michael@0	1071	mSection(eCSSSection_Charset),
michael@0	1072	mNameSpaceMap(nullptr),
michael@0	1073	mHavePushBack(false),
michael@0	1074	mNavQuirkMode(false),
michael@0	1075	mHashlessColorQuirk(false),
michael@0	1076	mUnitlessLengthQuirk(false),
michael@0	1077	mUnsafeRulesEnabled(false),
michael@0	1078	mIsChromeOrCertifiedApp(false),
michael@0	1079	mViewportUnitsEnabled(true),
michael@0	1080	mHTMLMediaMode(false),
michael@0	1081	mParsingCompoundProperty(false),
michael@0	1082	mInSupportsCondition(false),
michael@0	1083	mInFailingSupportsRule(false),
michael@0	1084	mSuppressErrors(false),
michael@0	1085	mNextFree(nullptr)
michael@0	1086	{
michael@0	1087	}
michael@0	1088
michael@0	1089	CSSParserImpl::~CSSParserImpl()
michael@0	1090	{
michael@0	1091	mData.AssertInitialState();
michael@0	1092	mTempData.AssertInitialState();
michael@0	1093	}
michael@0	1094
michael@0	1095	nsresult
michael@0	1096	CSSParserImpl::SetStyleSheet(nsCSSStyleSheet* aSheet)
michael@0	1097	{
michael@0	1098	if (aSheet != mSheet) {
michael@0	1099	// Switch to using the new sheet, if any
michael@0	1100	mGroupStack.Clear();
michael@0	1101	mSheet = aSheet;
michael@0	1102	if (mSheet) {
michael@0	1103	mNameSpaceMap = mSheet->GetNameSpaceMap();
michael@0	1104	} else {
michael@0	1105	mNameSpaceMap = nullptr;
michael@0	1106	}
michael@0	1107	} else if (mSheet) {
michael@0	1108	mNameSpaceMap = mSheet->GetNameSpaceMap();
michael@0	1109	}
michael@0	1110
michael@0	1111	return NS_OK;
michael@0	1112	}
michael@0	1113
michael@0	1114	nsresult
michael@0	1115	CSSParserImpl::SetQuirkMode(bool aQuirkMode)
michael@0	1116	{
michael@0	1117	mNavQuirkMode = aQuirkMode;
michael@0	1118	return NS_OK;
michael@0	1119	}
michael@0	1120
michael@0	1121	nsresult
michael@0	1122	CSSParserImpl::SetChildLoader(mozilla::css::Loader* aChildLoader)
michael@0	1123	{
michael@0	1124	mChildLoader = aChildLoader; // not ref counted, it owns us
michael@0	1125	return NS_OK;
michael@0	1126	}
michael@0	1127
michael@0	1128	void
michael@0	1129	CSSParserImpl::Reset()
michael@0	1130	{
michael@0	1131	NS_ASSERTION(!mScanner, "resetting with scanner active");
michael@0	1132	SetStyleSheet(nullptr);
michael@0	1133	SetQuirkMode(false);
michael@0	1134	SetChildLoader(nullptr);
michael@0	1135	}
michael@0	1136
michael@0	1137	void
michael@0	1138	CSSParserImpl::InitScanner(nsCSSScanner& aScanner,
michael@0	1139	css::ErrorReporter& aReporter,
michael@0	1140	nsIURI* aSheetURI, nsIURI* aBaseURI,
michael@0	1141	nsIPrincipal* aSheetPrincipal)
michael@0	1142	{
michael@0	1143	NS_PRECONDITION(!mHTMLMediaMode, "Bad initial state");
michael@0	1144	NS_PRECONDITION(!mParsingCompoundProperty, "Bad initial state");
michael@0	1145	NS_PRECONDITION(!mScanner, "already have scanner");
michael@0	1146
michael@0	1147	mScanner = &aScanner;
michael@0	1148	mReporter = &aReporter;
michael@0	1149	mScanner->SetErrorReporter(mReporter);
michael@0	1150
michael@0	1151	mBaseURI = aBaseURI;
michael@0	1152	mSheetURI = aSheetURI;
michael@0	1153	mSheetPrincipal = aSheetPrincipal;
michael@0	1154	mHavePushBack = false;
michael@0	1155	}
michael@0	1156
michael@0	1157	void
michael@0	1158	CSSParserImpl::ReleaseScanner()
michael@0	1159	{
michael@0	1160	mScanner = nullptr;
michael@0	1161	mReporter = nullptr;
michael@0	1162	mBaseURI = nullptr;
michael@0	1163	mSheetURI = nullptr;
michael@0	1164	mSheetPrincipal = nullptr;
michael@0	1165	}
michael@0	1166
michael@0	1167	nsresult
michael@0	1168	CSSParserImpl::ParseSheet(const nsAString& aInput,
michael@0	1169	nsIURI* aSheetURI,
michael@0	1170	nsIURI* aBaseURI,
michael@0	1171	nsIPrincipal* aSheetPrincipal,
michael@0	1172	uint32_t aLineNumber,
michael@0	1173	bool aAllowUnsafeRules)
michael@0	1174	{
michael@0	1175	NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
michael@0	1176	NS_PRECONDITION(aBaseURI, "need base URI");
michael@0	1177	NS_PRECONDITION(aSheetURI, "need sheet URI");
michael@0	1178	NS_PRECONDITION(mSheet, "Must have sheet to parse into");
michael@0	1179	NS_ENSURE_STATE(mSheet);
michael@0	1180
michael@0	1181	#ifdef DEBUG
michael@0	1182	nsIURI* uri = mSheet->GetSheetURI();
michael@0	1183	bool equal;
michael@0	1184	NS_ASSERTION(NS_SUCCEEDED(aSheetURI->Equals(uri, &equal)) && equal,
michael@0	1185	"Sheet URI does not match passed URI");
michael@0	1186	NS_ASSERTION(NS_SUCCEEDED(mSheet->Principal()->Equals(aSheetPrincipal,
michael@0	1187	&equal)) &&
michael@0	1188	equal,
michael@0	1189	"Sheet principal does not match passed principal");
michael@0	1190	#endif
michael@0	1191
michael@0	1192	nsCSSScanner scanner(aInput, aLineNumber);
michael@0	1193	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
michael@0	1194	InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
michael@0	1195
michael@0	1196	int32_t ruleCount = mSheet->StyleRuleCount();
michael@0	1197	if (0 < ruleCount) {
michael@0	1198	const css::Rule* lastRule = mSheet->GetStyleRuleAt(ruleCount - 1);
michael@0	1199	if (lastRule) {
michael@0	1200	switch (lastRule->GetType()) {
michael@0	1201	case css::Rule::CHARSET_RULE:
michael@0	1202	case css::Rule::IMPORT_RULE:
michael@0	1203	mSection = eCSSSection_Import;
michael@0	1204	break;
michael@0	1205	case css::Rule::NAMESPACE_RULE:
michael@0	1206	mSection = eCSSSection_NameSpace;
michael@0	1207	break;
michael@0	1208	default:
michael@0	1209	mSection = eCSSSection_General;
michael@0	1210	break;
michael@0	1211	}
michael@0	1212	}
michael@0	1213	}
michael@0	1214	else {
michael@0	1215	mSection = eCSSSection_Charset; // sheet is empty, any rules are fair
michael@0	1216	}
michael@0	1217
michael@0	1218	mUnsafeRulesEnabled = aAllowUnsafeRules;
michael@0	1219	mIsChromeOrCertifiedApp =
michael@0	1220	dom::IsChromeURI(aSheetURI) ||
michael@0	1221	aSheetPrincipal->GetAppStatus() == nsIPrincipal::APP_STATUS_CERTIFIED;
michael@0	1222
michael@0	1223	nsCSSToken* tk = &mToken;
michael@0	1224	for (;;) {
michael@0	1225	// Get next non-whitespace token
michael@0	1226	if (!GetToken(true)) {
michael@0	1227	OUTPUT_ERROR();
michael@0	1228	break;
michael@0	1229	}
michael@0	1230	if (eCSSToken_HTMLComment == tk->mType) {
michael@0	1231	continue; // legal here only
michael@0	1232	}
michael@0	1233	if (eCSSToken_AtKeyword == tk->mType) {
michael@0	1234	ParseAtRule(AppendRuleToSheet, this, false);
michael@0	1235	continue;
michael@0	1236	}
michael@0	1237	UngetToken();
michael@0	1238	if (ParseRuleSet(AppendRuleToSheet, this)) {
michael@0	1239	mSection = eCSSSection_General;
michael@0	1240	}
michael@0	1241	}
michael@0	1242	ReleaseScanner();
michael@0	1243
michael@0	1244	mUnsafeRulesEnabled = false;
michael@0	1245	mIsChromeOrCertifiedApp = false;
michael@0	1246
michael@0	1247	// XXX check for low level errors
michael@0	1248	return NS_OK;
michael@0	1249	}
michael@0	1250
michael@0	1251	/**
michael@0	1252	* Determines whether the identifier contained in the given string is a
michael@0	1253	* vendor-specific identifier, as described in CSS 2.1 section 4.1.2.1.
michael@0	1254	*/
michael@0	1255	static bool
michael@0	1256	NonMozillaVendorIdentifier(const nsAString& ident)
michael@0	1257	{
michael@0	1258	return (ident.First() == char16_t('-') &&
michael@0	1259	!StringBeginsWith(ident, NS_LITERAL_STRING("-moz-"))) ||
michael@0	1260	ident.First() == char16_t('_');
michael@0	1261
michael@0	1262	}
michael@0	1263
michael@0	1264	nsresult
michael@0	1265	CSSParserImpl::ParseStyleAttribute(const nsAString& aAttributeValue,
michael@0	1266	nsIURI* aDocURI,
michael@0	1267	nsIURI* aBaseURI,
michael@0	1268	nsIPrincipal* aNodePrincipal,
michael@0	1269	css::StyleRule** aResult)
michael@0	1270	{
michael@0	1271	NS_PRECONDITION(aNodePrincipal, "Must have principal here!");
michael@0	1272	NS_PRECONDITION(aBaseURI, "need base URI");
michael@0	1273
michael@0	1274	// XXX line number?
michael@0	1275	nsCSSScanner scanner(aAttributeValue, 0);
michael@0	1276	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aDocURI);
michael@0	1277	InitScanner(scanner, reporter, aDocURI, aBaseURI, aNodePrincipal);
michael@0	1278
michael@0	1279	mSection = eCSSSection_General;
michael@0	1280
michael@0	1281	uint32_t parseFlags = eParseDeclaration_AllowImportant;
michael@0	1282
michael@0	1283	css::Declaration* declaration = ParseDeclarationBlock(parseFlags);
michael@0	1284	if (declaration) {
michael@0	1285	// Create a style rule for the declaration
michael@0	1286	NS_ADDREF(*aResult = new css::StyleRule(nullptr, declaration));
michael@0	1287	} else {
michael@0	1288	*aResult = nullptr;
michael@0	1289	}
michael@0	1290
michael@0	1291	ReleaseScanner();
michael@0	1292
michael@0	1293	// XXX check for low level errors
michael@0	1294	return NS_OK;
michael@0	1295	}
michael@0	1296
michael@0	1297	nsresult
michael@0	1298	CSSParserImpl::ParseDeclarations(const nsAString& aBuffer,
michael@0	1299	nsIURI* aSheetURI,
michael@0	1300	nsIURI* aBaseURI,
michael@0	1301	nsIPrincipal* aSheetPrincipal,
michael@0	1302	css::Declaration* aDeclaration,
michael@0	1303	bool* aChanged)
michael@0	1304	{
michael@0	1305	*aChanged = false;
michael@0	1306
michael@0	1307	NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
michael@0	1308
michael@0	1309	nsCSSScanner scanner(aBuffer, 0);
michael@0	1310	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
michael@0	1311	InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
michael@0	1312
michael@0	1313	mSection = eCSSSection_General;
michael@0	1314
michael@0	1315	mData.AssertInitialState();
michael@0	1316	aDeclaration->ClearData();
michael@0	1317	// We could check if it was already empty, but...
michael@0	1318	*aChanged = true;
michael@0	1319
michael@0	1320	for (;;) {
michael@0	1321	// If we cleared the old decl, then we want to be calling
michael@0	1322	// ValueAppended as we parse.
michael@0	1323	if (!ParseDeclaration(aDeclaration, eParseDeclaration_AllowImportant,
michael@0	1324	true, aChanged)) {
michael@0	1325	if (!SkipDeclaration(false)) {
michael@0	1326	break;
michael@0	1327	}
michael@0	1328	}
michael@0	1329	}
michael@0	1330
michael@0	1331	aDeclaration->CompressFrom(&mData);
michael@0	1332	ReleaseScanner();
michael@0	1333	return NS_OK;
michael@0	1334	}
michael@0	1335
michael@0	1336	nsresult
michael@0	1337	CSSParserImpl::ParseRule(const nsAString& aRule,
michael@0	1338	nsIURI* aSheetURI,
michael@0	1339	nsIURI* aBaseURI,
michael@0	1340	nsIPrincipal* aSheetPrincipal,
michael@0	1341	css::Rule** aResult)
michael@0	1342	{
michael@0	1343	NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
michael@0	1344	NS_PRECONDITION(aBaseURI, "need base URI");
michael@0	1345
michael@0	1346	*aResult = nullptr;
michael@0	1347
michael@0	1348	nsCSSScanner scanner(aRule, 0);
michael@0	1349	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
michael@0	1350	InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
michael@0	1351
michael@0	1352	mSection = eCSSSection_Charset; // callers are responsible for rejecting invalid rules.
michael@0	1353
michael@0	1354	nsCSSToken* tk = &mToken;
michael@0	1355	// Get first non-whitespace token
michael@0	1356	nsresult rv = NS_OK;
michael@0	1357	if (!GetToken(true)) {
michael@0	1358	REPORT_UNEXPECTED(PEParseRuleWSOnly);
michael@0	1359	OUTPUT_ERROR();
michael@0	1360	rv = NS_ERROR_DOM_SYNTAX_ERR;
michael@0	1361	} else {
michael@0	1362	if (eCSSToken_AtKeyword == tk->mType) {
michael@0	1363	// FIXME: perhaps aInsideBlock should be true when we are?
michael@0	1364	ParseAtRule(AssignRuleToPointer, aResult, false);
michael@0	1365	} else {
michael@0	1366	UngetToken();
michael@0	1367	ParseRuleSet(AssignRuleToPointer, aResult);
michael@0	1368	}
michael@0	1369
michael@0	1370	if (*aResult && GetToken(true)) {
michael@0	1371	// garbage after rule
michael@0	1372	REPORT_UNEXPECTED_TOKEN(PERuleTrailing);
michael@0	1373	NS_RELEASE(*aResult);
michael@0	1374	}
michael@0	1375
michael@0	1376	if (!*aResult) {
michael@0	1377	rv = NS_ERROR_DOM_SYNTAX_ERR;
michael@0	1378	OUTPUT_ERROR();
michael@0	1379	}
michael@0	1380	}
michael@0	1381
michael@0	1382	ReleaseScanner();
michael@0	1383	return rv;
michael@0	1384	}
michael@0	1385
michael@0	1386	// See Bug 723197
michael@0	1387	#ifdef _MSC_VER
michael@0	1388	#pragma optimize( "", off )
michael@0	1389	#pragma warning( push )
michael@0	1390	#pragma warning( disable : 4748 )
michael@0	1391	#endif
michael@0	1392
michael@0	1393	nsresult
michael@0	1394	CSSParserImpl::ParseProperty(const nsCSSProperty aPropID,
michael@0	1395	const nsAString& aPropValue,
michael@0	1396	nsIURI* aSheetURI,
michael@0	1397	nsIURI* aBaseURI,
michael@0	1398	nsIPrincipal* aSheetPrincipal,
michael@0	1399	css::Declaration* aDeclaration,
michael@0	1400	bool* aChanged,
michael@0	1401	bool aIsImportant,
michael@0	1402	bool aIsSVGMode)
michael@0	1403	{
michael@0	1404	NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
michael@0	1405	NS_PRECONDITION(aBaseURI, "need base URI");
michael@0	1406	NS_PRECONDITION(aDeclaration, "Need declaration to parse into!");
michael@0	1407
michael@0	1408	mData.AssertInitialState();
michael@0	1409	mTempData.AssertInitialState();
michael@0	1410	aDeclaration->AssertMutable();
michael@0	1411
michael@0	1412	nsCSSScanner scanner(aPropValue, 0);
michael@0	1413	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
michael@0	1414	InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
michael@0	1415	mSection = eCSSSection_General;
michael@0	1416	scanner.SetSVGMode(aIsSVGMode);
michael@0	1417
michael@0	1418	*aChanged = false;
michael@0	1419
michael@0	1420	// Check for unknown or preffed off properties
michael@0	1421	if (eCSSProperty_UNKNOWN == aPropID ||
michael@0	1422	!(nsCSSProps::IsEnabled(aPropID) ||
michael@0	1423	(mUnsafeRulesEnabled &&
michael@0	1424	nsCSSProps::PropHasFlags(aPropID,
michael@0	1425	CSS_PROPERTY_ALWAYS_ENABLED_IN_UA_SHEETS)))) {
michael@0	1426	NS_ConvertASCIItoUTF16 propName(nsCSSProps::GetStringValue(aPropID));
michael@0	1427	REPORT_UNEXPECTED_P(PEUnknownProperty, propName);
michael@0	1428	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	1429	OUTPUT_ERROR();
michael@0	1430	ReleaseScanner();
michael@0	1431	return NS_OK;
michael@0	1432	}
michael@0	1433
michael@0	1434	bool parsedOK = ParseProperty(aPropID);
michael@0	1435	// We should now be at EOF
michael@0	1436	if (parsedOK && GetToken(true)) {
michael@0	1437	REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
michael@0	1438	parsedOK = false;
michael@0	1439	}
michael@0	1440
michael@0	1441	if (!parsedOK) {
michael@0	1442	NS_ConvertASCIItoUTF16 propName(nsCSSProps::GetStringValue(aPropID));
michael@0	1443	REPORT_UNEXPECTED_P(PEValueParsingError, propName);
michael@0	1444	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	1445	OUTPUT_ERROR();
michael@0	1446	mTempData.ClearProperty(aPropID);
michael@0	1447	} else {
michael@0	1448
michael@0	1449	// We know we don't need to force a ValueAppended call for the new
michael@0	1450	// value. So if we are not processing a shorthand, and there's
michael@0	1451	// already a value for this property in the declaration at the
michael@0	1452	// same importance level, then we can just copy our parsed value
michael@0	1453	// directly into the declaration without going through the whole
michael@0	1454	// expand/compress thing.
michael@0	1455	if (!aDeclaration->TryReplaceValue(aPropID, aIsImportant, mTempData,
michael@0	1456	aChanged)) {
michael@0	1457	// Do it the slow way
michael@0	1458	aDeclaration->ExpandTo(&mData);
michael@0	1459	*aChanged = mData.TransferFromBlock(mTempData, aPropID, aIsImportant,
michael@0	1460	true, false, aDeclaration);
michael@0	1461	aDeclaration->CompressFrom(&mData);
michael@0	1462	}
michael@0	1463	CLEAR_ERROR();
michael@0	1464	}
michael@0	1465
michael@0	1466	mTempData.AssertInitialState();
michael@0	1467
michael@0	1468	ReleaseScanner();
michael@0	1469	return NS_OK;
michael@0	1470	}
michael@0	1471
michael@0	1472	nsresult
michael@0	1473	CSSParserImpl::ParseVariable(const nsAString& aVariableName,
michael@0	1474	const nsAString& aPropValue,
michael@0	1475	nsIURI* aSheetURI,
michael@0	1476	nsIURI* aBaseURI,
michael@0	1477	nsIPrincipal* aSheetPrincipal,
michael@0	1478	css::Declaration* aDeclaration,
michael@0	1479	bool* aChanged,
michael@0	1480	bool aIsImportant)
michael@0	1481	{
michael@0	1482	NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
michael@0	1483	NS_PRECONDITION(aBaseURI, "need base URI");
michael@0	1484	NS_PRECONDITION(aDeclaration, "Need declaration to parse into!");
michael@0	1485	NS_PRECONDITION(nsLayoutUtils::CSSVariablesEnabled(),
michael@0	1486	"expected Variables to be enabled");
michael@0	1487
michael@0	1488	mData.AssertInitialState();
michael@0	1489	mTempData.AssertInitialState();
michael@0	1490	aDeclaration->AssertMutable();
michael@0	1491
michael@0	1492	nsCSSScanner scanner(aPropValue, 0);
michael@0	1493	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
michael@0	1494	InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
michael@0	1495	mSection = eCSSSection_General;
michael@0	1496
michael@0	1497	*aChanged = false;
michael@0	1498
michael@0	1499	CSSVariableDeclarations::Type variableType;
michael@0	1500	nsString variableValue;
michael@0	1501
michael@0	1502	bool parsedOK = ParseVariableDeclaration(&variableType, variableValue);
michael@0	1503
michael@0	1504	// We should now be at EOF
michael@0	1505	if (parsedOK && GetToken(true)) {
michael@0	1506	REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
michael@0	1507	parsedOK = false;
michael@0	1508	}
michael@0	1509
michael@0	1510	if (!parsedOK) {
michael@0	1511	REPORT_UNEXPECTED_P(PEValueParsingError, NS_LITERAL_STRING("--") +
michael@0	1512	aVariableName);
michael@0	1513	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	1514	OUTPUT_ERROR();
michael@0	1515	} else {
michael@0	1516	CLEAR_ERROR();
michael@0	1517	aDeclaration->AddVariableDeclaration(aVariableName, variableType,
michael@0	1518	variableValue, aIsImportant, true);
michael@0	1519	*aChanged = true;
michael@0	1520	}
michael@0	1521
michael@0	1522	mTempData.AssertInitialState();
michael@0	1523
michael@0	1524	ReleaseScanner();
michael@0	1525	return NS_OK;
michael@0	1526	}
michael@0	1527
michael@0	1528	#ifdef _MSC_VER
michael@0	1529	#pragma warning( pop )
michael@0	1530	#pragma optimize( "", on )
michael@0	1531	#endif
michael@0	1532
michael@0	1533	void
michael@0	1534	CSSParserImpl::ParseMediaList(const nsSubstring& aBuffer,
michael@0	1535	nsIURI* aURI, // for error reporting
michael@0	1536	uint32_t aLineNumber, // for error reporting
michael@0	1537	nsMediaList* aMediaList,
michael@0	1538	bool aHTMLMode)
michael@0	1539	{
michael@0	1540	// XXX Are there cases where the caller wants to keep what it already
michael@0	1541	// has in case of parser error? If GatherMedia ever changes to return
michael@0	1542	// a value other than true, we probably should avoid modifying aMediaList.
michael@0	1543	aMediaList->Clear();
michael@0	1544
michael@0	1545	// fake base URI since media lists don't have URIs in them
michael@0	1546	nsCSSScanner scanner(aBuffer, aLineNumber);
michael@0	1547	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
michael@0	1548	InitScanner(scanner, reporter, aURI, aURI, nullptr);
michael@0	1549
michael@0	1550	mHTMLMediaMode = aHTMLMode;
michael@0	1551
michael@0	1552	// XXXldb We need to make the scanner not skip CSS comments! (Or
michael@0	1553	// should we?)
michael@0	1554
michael@0	1555	// For aHTMLMode, we used to follow the parsing rules in
michael@0	1556	// http://www.w3.org/TR/1999/REC-html401-19991224/types.html#type-media-descriptors
michael@0	1557	// which wouldn't work for media queries since they remove all but the
michael@0	1558	// first word. However, they're changed in
michael@0	1559	// http://www.whatwg.org/specs/web-apps/current-work/multipage/section-document.html#media2
michael@0	1560	// (as of 2008-05-29) which says that the media attribute just points
michael@0	1561	// to a media query. (The main substative difference is the relative
michael@0	1562	// precedence of commas and paretheses.)
michael@0	1563
michael@0	1564	DebugOnly<bool> parsedOK = GatherMedia(aMediaList, false);
michael@0	1565	NS_ASSERTION(parsedOK, "GatherMedia returned false; we probably want to avoid "
michael@0	1566	"trashing aMediaList");
michael@0	1567
michael@0	1568	CLEAR_ERROR();
michael@0	1569	ReleaseScanner();
michael@0	1570	mHTMLMediaMode = false;
michael@0	1571	}
michael@0	1572
michael@0	1573	bool
michael@0	1574	CSSParserImpl::ParseColorString(const nsSubstring& aBuffer,
michael@0	1575	nsIURI* aURI, // for error reporting
michael@0	1576	uint32_t aLineNumber, // for error reporting
michael@0	1577	nsCSSValue& aValue)
michael@0	1578	{
michael@0	1579	nsCSSScanner scanner(aBuffer, aLineNumber);
michael@0	1580	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
michael@0	1581	InitScanner(scanner, reporter, aURI, aURI, nullptr);
michael@0	1582
michael@0	1583	// Parse a color, and check that there's nothing else after it.
michael@0	1584	bool colorParsed = ParseColor(aValue) && !GetToken(true);
michael@0	1585	OUTPUT_ERROR();
michael@0	1586	ReleaseScanner();
michael@0	1587	return colorParsed;
michael@0	1588	}
michael@0	1589
michael@0	1590	nsresult
michael@0	1591	CSSParserImpl::ParseSelectorString(const nsSubstring& aSelectorString,
michael@0	1592	nsIURI* aURI, // for error reporting
michael@0	1593	uint32_t aLineNumber, // for error reporting
michael@0	1594	nsCSSSelectorList **aSelectorList)
michael@0	1595	{
michael@0	1596	nsCSSScanner scanner(aSelectorString, aLineNumber);
michael@0	1597	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
michael@0	1598	InitScanner(scanner, reporter, aURI, aURI, nullptr);
michael@0	1599
michael@0	1600	bool success = ParseSelectorList(*aSelectorList, char16_t(0));
michael@0	1601
michael@0	1602	// We deliberately do not call OUTPUT_ERROR here, because all our
michael@0	1603	// callers map a failure return to a JS exception, and if that JS
michael@0	1604	// exception is caught, people don't want to see parser diagnostics;
michael@0	1605	// see e.g. http://bugs.jquery.com/ticket/7535
michael@0	1606	// It would be nice to be able to save the parser diagnostics into
michael@0	1607	// the exception, so that if it _isn't_ caught we can report them
michael@0	1608	// along with the usual uncaught-exception message, but we don't
michael@0	1609	// have any way to do that at present; see bug 631621.
michael@0	1610	CLEAR_ERROR();
michael@0	1611	ReleaseScanner();
michael@0	1612
michael@0	1613	if (success) {
michael@0	1614	NS_ASSERTION(*aSelectorList, "Should have list!");
michael@0	1615	return NS_OK;
michael@0	1616	}
michael@0	1617
michael@0	1618	NS_ASSERTION(!*aSelectorList, "Shouldn't have list!");
michael@0	1619
michael@0	1620	return NS_ERROR_DOM_SYNTAX_ERR;
michael@0	1621	}
michael@0	1622
michael@0	1623
michael@0	1624	already_AddRefed<nsCSSKeyframeRule>
michael@0	1625	CSSParserImpl::ParseKeyframeRule(const nsSubstring& aBuffer,
michael@0	1626	nsIURI* aURI,
michael@0	1627	uint32_t aLineNumber)
michael@0	1628	{
michael@0	1629	nsCSSScanner scanner(aBuffer, aLineNumber);
michael@0	1630	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
michael@0	1631	InitScanner(scanner, reporter, aURI, aURI, nullptr);
michael@0	1632
michael@0	1633	nsRefPtr<nsCSSKeyframeRule> result = ParseKeyframeRule();
michael@0	1634	if (GetToken(true)) {
michael@0	1635	// extra garbage at the end
michael@0	1636	result = nullptr;
michael@0	1637	}
michael@0	1638
michael@0	1639	OUTPUT_ERROR();
michael@0	1640	ReleaseScanner();
michael@0	1641
michael@0	1642	return result.forget();
michael@0	1643	}
michael@0	1644
michael@0	1645	bool
michael@0	1646	CSSParserImpl::ParseKeyframeSelectorString(const nsSubstring& aSelectorString,
michael@0	1647	nsIURI* aURI, // for error reporting
michael@0	1648	uint32_t aLineNumber, // for error reporting
michael@0	1649	InfallibleTArray<float>& aSelectorList)
michael@0	1650	{
michael@0	1651	NS_ABORT_IF_FALSE(aSelectorList.IsEmpty(), "given list should start empty");
michael@0	1652
michael@0	1653	nsCSSScanner scanner(aSelectorString, aLineNumber);
michael@0	1654	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
michael@0	1655	InitScanner(scanner, reporter, aURI, aURI, nullptr);
michael@0	1656
michael@0	1657	bool success = ParseKeyframeSelectorList(aSelectorList) &&
michael@0	1658	// must consume entire input string
michael@0	1659	!GetToken(true);
michael@0	1660
michael@0	1661	OUTPUT_ERROR();
michael@0	1662	ReleaseScanner();
michael@0	1663
michael@0	1664	if (success) {
michael@0	1665	NS_ASSERTION(!aSelectorList.IsEmpty(), "should not be empty");
michael@0	1666	} else {
michael@0	1667	aSelectorList.Clear();
michael@0	1668	}
michael@0	1669
michael@0	1670	return success;
michael@0	1671	}
michael@0	1672
michael@0	1673	bool
michael@0	1674	CSSParserImpl::EvaluateSupportsDeclaration(const nsAString& aProperty,
michael@0	1675	const nsAString& aValue,
michael@0	1676	nsIURI* aDocURL,
michael@0	1677	nsIURI* aBaseURL,
michael@0	1678	nsIPrincipal* aDocPrincipal)
michael@0	1679	{
michael@0	1680	nsCSSProperty propID = LookupEnabledProperty(aProperty);
michael@0	1681	if (propID == eCSSProperty_UNKNOWN) {
michael@0	1682	return false;
michael@0	1683	}
michael@0	1684
michael@0	1685	nsCSSScanner scanner(aValue, 0);
michael@0	1686	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aDocURL);
michael@0	1687	InitScanner(scanner, reporter, aDocURL, aBaseURL, aDocPrincipal);
michael@0	1688	nsAutoSuppressErrors suppressErrors(this);
michael@0	1689
michael@0	1690	bool parsedOK;
michael@0	1691
michael@0	1692	if (propID == eCSSPropertyExtra_variable) {
michael@0	1693	MOZ_ASSERT(Substring(aProperty, 0,
michael@0	1694	CSS_CUSTOM_NAME_PREFIX_LENGTH).EqualsLiteral("--"));
michael@0	1695	const nsDependentSubstring varName =
michael@0	1696	Substring(aProperty, CSS_CUSTOM_NAME_PREFIX_LENGTH); // remove '--'
michael@0	1697	CSSVariableDeclarations::Type variableType;
michael@0	1698	nsString variableValue;
michael@0	1699	parsedOK = ParseVariableDeclaration(&variableType, variableValue) &&
michael@0	1700	!GetToken(true);
michael@0	1701	} else {
michael@0	1702	parsedOK = ParseProperty(propID) && !GetToken(true);
michael@0	1703
michael@0	1704	mTempData.ClearProperty(propID);
michael@0	1705	mTempData.AssertInitialState();
michael@0	1706	}
michael@0	1707
michael@0	1708	CLEAR_ERROR();
michael@0	1709	ReleaseScanner();
michael@0	1710
michael@0	1711	return parsedOK;
michael@0	1712	}
michael@0	1713
michael@0	1714	bool
michael@0	1715	CSSParserImpl::EvaluateSupportsCondition(const nsAString& aDeclaration,
michael@0	1716	nsIURI* aDocURL,
michael@0	1717	nsIURI* aBaseURL,
michael@0	1718	nsIPrincipal* aDocPrincipal)
michael@0	1719	{
michael@0	1720	nsCSSScanner scanner(aDeclaration, 0);
michael@0	1721	css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aDocURL);
michael@0	1722	InitScanner(scanner, reporter, aDocURL, aBaseURL, aDocPrincipal);
michael@0	1723	nsAutoSuppressErrors suppressErrors(this);
michael@0	1724
michael@0	1725	bool conditionMet;
michael@0	1726	bool parsedOK = ParseSupportsCondition(conditionMet) && !GetToken(true);
michael@0	1727
michael@0	1728	CLEAR_ERROR();
michael@0	1729	ReleaseScanner();
michael@0	1730
michael@0	1731	return parsedOK && conditionMet;
michael@0	1732	}
michael@0	1733
michael@0	1734	bool
michael@0	1735	CSSParserImpl::EnumerateVariableReferences(const nsAString& aPropertyValue,
michael@0	1736	VariableEnumFunc aFunc,
michael@0	1737	void* aData)
michael@0	1738	{
michael@0	1739	nsCSSScanner scanner(aPropertyValue, 0);
michael@0	1740	css::ErrorReporter reporter(scanner, nullptr, nullptr, nullptr);
michael@0	1741	InitScanner(scanner, reporter, nullptr, nullptr, nullptr);
michael@0	1742	nsAutoSuppressErrors suppressErrors(this);
michael@0	1743
michael@0	1744	CSSVariableDeclarations::Type type;
michael@0	1745	bool dropBackslash;
michael@0	1746	nsString impliedCharacters;
michael@0	1747	bool result = ParseValueWithVariables(&type, &dropBackslash,
michael@0	1748	impliedCharacters, aFunc, aData) &&
michael@0	1749	!GetToken(true);
michael@0	1750
michael@0	1751	ReleaseScanner();
michael@0	1752
michael@0	1753	return result;
michael@0	1754	}
michael@0	1755
michael@0	1756	static bool
michael@0	1757	SeparatorRequiredBetweenTokens(nsCSSTokenSerializationType aToken1,
michael@0	1758	nsCSSTokenSerializationType aToken2)
michael@0	1759	{
michael@0	1760	// The two lines marked with (*) do not correspond to entries in
michael@0	1761	// the table in the css-syntax spec but which we need to handle,
michael@0	1762	// as we treat them as whole tokens.
michael@0	1763	switch (aToken1) {
michael@0	1764	case eCSSTokenSerialization_Ident:
michael@0	1765	return aToken2 == eCSSTokenSerialization_Ident ||
michael@0	1766	aToken2 == eCSSTokenSerialization_Function ||
michael@0	1767	aToken2 == eCSSTokenSerialization_URL_or_BadURL ||
michael@0	1768	aToken2 == eCSSTokenSerialization_Symbol_Minus ||
michael@0	1769	aToken2 == eCSSTokenSerialization_Number ||
michael@0	1770	aToken2 == eCSSTokenSerialization_Percentage ||
michael@0	1771	aToken2 == eCSSTokenSerialization_Dimension ||
michael@0	1772	aToken2 == eCSSTokenSerialization_URange ||
michael@0	1773	aToken2 == eCSSTokenSerialization_CDC ||
michael@0	1774	aToken2 == eCSSTokenSerialization_Symbol_OpenParen;
michael@0	1775	case eCSSTokenSerialization_AtKeyword_or_Hash:
michael@0	1776	case eCSSTokenSerialization_Dimension:
michael@0	1777	return aToken2 == eCSSTokenSerialization_Ident ||
michael@0	1778	aToken2 == eCSSTokenSerialization_Function ||
michael@0	1779	aToken2 == eCSSTokenSerialization_URL_or_BadURL ||
michael@0	1780	aToken2 == eCSSTokenSerialization_Symbol_Minus ||
michael@0	1781	aToken2 == eCSSTokenSerialization_Number ||
michael@0	1782	aToken2 == eCSSTokenSerialization_Percentage ||
michael@0	1783	aToken2 == eCSSTokenSerialization_Dimension ||
michael@0	1784	aToken2 == eCSSTokenSerialization_URange ||
michael@0	1785	aToken2 == eCSSTokenSerialization_CDC;
michael@0	1786	case eCSSTokenSerialization_Symbol_Hash:
michael@0	1787	return aToken2 == eCSSTokenSerialization_Ident ||
michael@0	1788	aToken2 == eCSSTokenSerialization_Function ||
michael@0	1789	aToken2 == eCSSTokenSerialization_URL_or_BadURL ||
michael@0	1790	aToken2 == eCSSTokenSerialization_Symbol_Minus ||
michael@0	1791	aToken2 == eCSSTokenSerialization_Number ||
michael@0	1792	aToken2 == eCSSTokenSerialization_Percentage ||
michael@0	1793	aToken2 == eCSSTokenSerialization_Dimension ||
michael@0	1794	aToken2 == eCSSTokenSerialization_URange;
michael@0	1795	case eCSSTokenSerialization_Symbol_Minus:
michael@0	1796	case eCSSTokenSerialization_Number:
michael@0	1797	return aToken2 == eCSSTokenSerialization_Ident ||
michael@0	1798	aToken2 == eCSSTokenSerialization_Function ||
michael@0	1799	aToken2 == eCSSTokenSerialization_URL_or_BadURL ||
michael@0	1800	aToken2 == eCSSTokenSerialization_Number ||
michael@0	1801	aToken2 == eCSSTokenSerialization_Percentage ||
michael@0	1802	aToken2 == eCSSTokenSerialization_Dimension ||
michael@0	1803	aToken2 == eCSSTokenSerialization_URange;
michael@0	1804	case eCSSTokenSerialization_Symbol_At:
michael@0	1805	return aToken2 == eCSSTokenSerialization_Ident ||
michael@0	1806	aToken2 == eCSSTokenSerialization_Function ||
michael@0	1807	aToken2 == eCSSTokenSerialization_URL_or_BadURL ||
michael@0	1808	aToken2 == eCSSTokenSerialization_Symbol_Minus ||
michael@0	1809	aToken2 == eCSSTokenSerialization_URange;
michael@0	1810	case eCSSTokenSerialization_URange:
michael@0	1811	return aToken2 == eCSSTokenSerialization_Ident ||
michael@0	1812	aToken2 == eCSSTokenSerialization_Function ||
michael@0	1813	aToken2 == eCSSTokenSerialization_Number ||
michael@0	1814	aToken2 == eCSSTokenSerialization_Percentage ||
michael@0	1815	aToken2 == eCSSTokenSerialization_Dimension ||
michael@0	1816	aToken2 == eCSSTokenSerialization_Symbol_Question;
michael@0	1817	case eCSSTokenSerialization_Symbol_Dot_or_Plus:
michael@0	1818	return aToken2 == eCSSTokenSerialization_Number ||
michael@0	1819	aToken2 == eCSSTokenSerialization_Percentage ||
michael@0	1820	aToken2 == eCSSTokenSerialization_Dimension;
michael@0	1821	case eCSSTokenSerialization_Symbol_Assorted:
michael@0	1822	case eCSSTokenSerialization_Symbol_Asterisk:
michael@0	1823	return aToken2 == eCSSTokenSerialization_Symbol_Equals;
michael@0	1824	case eCSSTokenSerialization_Symbol_Bar:
michael@0	1825	return aToken2 == eCSSTokenSerialization_Symbol_Equals ||
michael@0	1826	aToken2 == eCSSTokenSerialization_Symbol_Bar ||
michael@0	1827	aToken2 == eCSSTokenSerialization_DashMatch; // (*)
michael@0	1828	case eCSSTokenSerialization_Symbol_Slash:
michael@0	1829	return aToken2 == eCSSTokenSerialization_Symbol_Asterisk ||
michael@0	1830	aToken2 == eCSSTokenSerialization_ContainsMatch; // (*)
michael@0	1831	default:
michael@0	1832	MOZ_ASSERT(aToken1 == eCSSTokenSerialization_Nothing ||
michael@0	1833	aToken1 == eCSSTokenSerialization_Whitespace ||
michael@0	1834	aToken1 == eCSSTokenSerialization_Percentage ||
michael@0	1835	aToken1 == eCSSTokenSerialization_URL_or_BadURL ||
michael@0	1836	aToken1 == eCSSTokenSerialization_Function ||
michael@0	1837	aToken1 == eCSSTokenSerialization_CDC ||
michael@0	1838	aToken1 == eCSSTokenSerialization_Symbol_OpenParen ||
michael@0	1839	aToken1 == eCSSTokenSerialization_Symbol_Question ||
michael@0	1840	aToken1 == eCSSTokenSerialization_Symbol_Assorted ||
michael@0	1841	aToken1 == eCSSTokenSerialization_Symbol_Asterisk ||
michael@0	1842	aToken1 == eCSSTokenSerialization_Symbol_Equals ||
michael@0	1843	aToken1 == eCSSTokenSerialization_Symbol_Bar ||
michael@0	1844	aToken1 == eCSSTokenSerialization_Symbol_Slash ||
michael@0	1845	aToken1 == eCSSTokenSerialization_Other ||
michael@0	1846	"unexpected nsCSSTokenSerializationType value");
michael@0	1847	return false;
michael@0	1848	}
michael@0	1849	}
michael@0	1850
michael@0	1851	/**
michael@0	1852	* Appends aValue to aResult, possibly inserting an empty CSS
michael@0	1853	* comment between the two to ensure that tokens from both strings
michael@0	1854	* remain separated.
michael@0	1855	*/
michael@0	1856	static void
michael@0	1857	AppendTokens(nsAString& aResult,
michael@0	1858	nsCSSTokenSerializationType& aResultFirstToken,
michael@0	1859	nsCSSTokenSerializationType& aResultLastToken,
michael@0	1860	nsCSSTokenSerializationType aValueFirstToken,
michael@0	1861	nsCSSTokenSerializationType aValueLastToken,
michael@0	1862	const nsAString& aValue)
michael@0	1863	{
michael@0	1864	if (SeparatorRequiredBetweenTokens(aResultLastToken, aValueFirstToken)) {
michael@0	1865	aResult.AppendLiteral("/**/");
michael@0	1866	}
michael@0	1867	aResult.Append(aValue);
michael@0	1868	if (aResultFirstToken == eCSSTokenSerialization_Nothing) {
michael@0	1869	aResultFirstToken = aValueFirstToken;
michael@0	1870	}
michael@0	1871	if (aValueLastToken != eCSSTokenSerialization_Nothing) {
michael@0	1872	aResultLastToken = aValueLastToken;
michael@0	1873	}
michael@0	1874	}
michael@0	1875
michael@0	1876	/**
michael@0	1877	* Stops the given scanner recording, and appends the recorded result
michael@0	1878	* to aResult, possibly inserting an empty CSS comment between the two to
michael@0	1879	* ensure that tokens from both strings remain separated.
michael@0	1880	*/
michael@0	1881	static void
michael@0	1882	StopRecordingAndAppendTokens(nsString& aResult,
michael@0	1883	nsCSSTokenSerializationType& aResultFirstToken,
michael@0	1884	nsCSSTokenSerializationType& aResultLastToken,
michael@0	1885	nsCSSTokenSerializationType aValueFirstToken,
michael@0	1886	nsCSSTokenSerializationType aValueLastToken,
michael@0	1887	nsCSSScanner* aScanner)
michael@0	1888	{
michael@0	1889	if (SeparatorRequiredBetweenTokens(aResultLastToken, aValueFirstToken)) {
michael@0	1890	aResult.AppendLiteral("/**/");
michael@0	1891	}
michael@0	1892	aScanner->StopRecording(aResult);
michael@0	1893	if (aResultFirstToken == eCSSTokenSerialization_Nothing) {
michael@0	1894	aResultFirstToken = aValueFirstToken;
michael@0	1895	}
michael@0	1896	if (aValueLastToken != eCSSTokenSerialization_Nothing) {
michael@0	1897	aResultLastToken = aValueLastToken;
michael@0	1898	}
michael@0	1899	}
michael@0	1900
michael@0	1901	bool
michael@0	1902	CSSParserImpl::ResolveValueWithVariableReferencesRec(
michael@0	1903	nsString& aResult,
michael@0	1904	nsCSSTokenSerializationType& aResultFirstToken,
michael@0	1905	nsCSSTokenSerializationType& aResultLastToken,
michael@0	1906	const CSSVariableValues* aVariables)
michael@0	1907	{
michael@0	1908	// This function assumes we are already recording, and will leave the scanner
michael@0	1909	// recording when it returns.
michael@0	1910	MOZ_ASSERT(mScanner->IsRecording());
michael@0	1911	MOZ_ASSERT(aResult.IsEmpty());
michael@0	1912
michael@0	1913	// Stack of closing characters for currently open constructs.
michael@0	1914	nsAutoTArray<char16_t, 16> stack;
michael@0	1915
michael@0	1916	// The resolved value for this ResolveValueWithVariableReferencesRec call.
michael@0	1917	nsString value;
michael@0	1918
michael@0	1919	// The length of the scanner's recording before the currently parsed token.
michael@0	1920	// This is used so that when we encounter a "var(" token, we can strip
michael@0	1921	// it off the end of the recording, regardless of how long the token was.
michael@0	1922	// (With escapes, it could be longer than four characters.)
michael@0	1923	uint32_t lengthBeforeVar = 0;
michael@0	1924
michael@0	1925	// Tracking the type of token that appears at the start and end of |value|
michael@0	1926	// and that appears at the start and end of the scanner recording. These are
michael@0	1927	// used to determine whether we need to insert "/**/" when pasting token
michael@0	1928	// streams together.
michael@0	1929	nsCSSTokenSerializationType valueFirstToken = eCSSTokenSerialization_Nothing,
michael@0	1930	valueLastToken = eCSSTokenSerialization_Nothing,
michael@0	1931	recFirstToken = eCSSTokenSerialization_Nothing,
michael@0	1932	recLastToken = eCSSTokenSerialization_Nothing;
michael@0	1933
michael@0	1934	#define UPDATE_RECORDING_TOKENS(type) \
michael@0	1935	if (recFirstToken == eCSSTokenSerialization_Nothing) { \
michael@0	1936	recFirstToken = type; \
michael@0	1937	} \
michael@0	1938	recLastToken = type;
michael@0	1939
michael@0	1940	while (GetToken(false)) {
michael@0	1941	switch (mToken.mType) {
michael@0	1942	case eCSSToken_Symbol: {
michael@0	1943	nsCSSTokenSerializationType type = eCSSTokenSerialization_Other;
michael@0	1944	if (mToken.mSymbol == '(') {
michael@0	1945	stack.AppendElement(')');
michael@0	1946	type = eCSSTokenSerialization_Symbol_OpenParen;
michael@0	1947	} else if (mToken.mSymbol == '[') {
michael@0	1948	stack.AppendElement(']');
michael@0	1949	} else if (mToken.mSymbol == '{') {
michael@0	1950	stack.AppendElement('}');
michael@0	1951	} else if (mToken.mSymbol == ';') {
michael@0	1952	if (stack.IsEmpty()) {
michael@0	1953	// A ';' that is at the top level of the value or at the top level
michael@0	1954	// of a variable reference's fallback is invalid.
michael@0	1955	return false;
michael@0	1956	}
michael@0	1957	} else if (mToken.mSymbol == '!') {
michael@0	1958	if (stack.IsEmpty()) {
michael@0	1959	// An '!' that is at the top level of the value or at the top level
michael@0	1960	// of a variable reference's fallback is invalid.
michael@0	1961	return false;
michael@0	1962	}
michael@0	1963	} else if (mToken.mSymbol == ')' &&
michael@0	1964	stack.IsEmpty()) {
michael@0	1965	// We're closing a "var(".
michael@0	1966	nsString finalTokens;
michael@0	1967	mScanner->StopRecording(finalTokens);
michael@0	1968	MOZ_ASSERT(finalTokens[finalTokens.Length() - 1] == ')');
michael@0	1969	finalTokens.Truncate(finalTokens.Length() - 1);
michael@0	1970	aResult.Append(value);
michael@0	1971
michael@0	1972	AppendTokens(aResult, valueFirstToken, valueLastToken,
michael@0	1973	recFirstToken, recLastToken, finalTokens);
michael@0	1974
michael@0	1975	mScanner->StartRecording();
michael@0	1976	UngetToken();
michael@0	1977	aResultFirstToken = valueFirstToken;
michael@0	1978	aResultLastToken = valueLastToken;
michael@0	1979	return true;
michael@0	1980	} else if (mToken.mSymbol == ')' ||
michael@0	1981	mToken.mSymbol == ']' ||
michael@0	1982	mToken.mSymbol == '}') {
michael@0	1983	if (stack.IsEmpty() ||
michael@0	1984	stack.LastElement() != mToken.mSymbol) {
michael@0	1985	// A mismatched closing bracket is invalid.
michael@0	1986	return false;
michael@0	1987	}
michael@0	1988	stack.TruncateLength(stack.Length() - 1);
michael@0	1989	} else if (mToken.mSymbol == '#') {
michael@0	1990	type = eCSSTokenSerialization_Symbol_Hash;
michael@0	1991	} else if (mToken.mSymbol == '@') {
michael@0	1992	type = eCSSTokenSerialization_Symbol_At;
michael@0	1993	} else if (mToken.mSymbol == '.' ||
michael@0	1994	mToken.mSymbol == '+') {
michael@0	1995	type = eCSSTokenSerialization_Symbol_Dot_or_Plus;
michael@0	1996	} else if (mToken.mSymbol == '-') {
michael@0	1997	type = eCSSTokenSerialization_Symbol_Minus;
michael@0	1998	} else if (mToken.mSymbol == '?') {
michael@0	1999	type = eCSSTokenSerialization_Symbol_Question;
michael@0	2000	} else if (mToken.mSymbol == '$' ||
michael@0	2001	mToken.mSymbol == '^' ||
michael@0	2002	mToken.mSymbol == '~') {
michael@0	2003	type = eCSSTokenSerialization_Symbol_Assorted;
michael@0	2004	} else if (mToken.mSymbol == '=') {
michael@0	2005	type = eCSSTokenSerialization_Symbol_Equals;
michael@0	2006	} else if (mToken.mSymbol == '|') {
michael@0	2007	type = eCSSTokenSerialization_Symbol_Bar;
michael@0	2008	} else if (mToken.mSymbol == '/') {
michael@0	2009	type = eCSSTokenSerialization_Symbol_Slash;
michael@0	2010	} else if (mToken.mSymbol == '*') {
michael@0	2011	type = eCSSTokenSerialization_Symbol_Asterisk;
michael@0	2012	}
michael@0	2013	UPDATE_RECORDING_TOKENS(type);
michael@0	2014	break;
michael@0	2015	}
michael@0	2016
michael@0	2017	case eCSSToken_Function:
michael@0	2018	if (mToken.mIdent.LowerCaseEqualsLiteral("var")) {
michael@0	2019	// Save the tokens before the "var(" to our resolved value.
michael@0	2020	nsString recording;
michael@0	2021	mScanner->StopRecording(recording);
michael@0	2022	recording.Truncate(lengthBeforeVar);
michael@0	2023	AppendTokens(value, valueFirstToken, valueLastToken,
michael@0	2024	recFirstToken, recLastToken, recording);
michael@0	2025	recFirstToken = eCSSTokenSerialization_Nothing;
michael@0	2026	recLastToken = eCSSTokenSerialization_Nothing;
michael@0	2027
michael@0	2028	if (!GetToken(true) ||
michael@0	2029	mToken.mType != eCSSToken_Ident ||
michael@0	2030	!nsCSSProps::IsCustomPropertyName(mToken.mIdent)) {
michael@0	2031	// "var(" must be followed by an identifier, and it must be a
michael@0	2032	// custom property name.
michael@0	2033	return false;
michael@0	2034	}
michael@0	2035
michael@0	2036	// Turn the custom property name into a variable name by removing the
michael@0	2037	// '--' prefix.
michael@0	2038	MOZ_ASSERT(Substring(mToken.mIdent, 0,
michael@0	2039	CSS_CUSTOM_NAME_PREFIX_LENGTH).
michael@0	2040	EqualsLiteral("--"));
michael@0	2041	nsDependentString variableName(mToken.mIdent,
michael@0	2042	CSS_CUSTOM_NAME_PREFIX_LENGTH);
michael@0	2043
michael@0	2044	// Get the value of the identified variable. Note that we
michael@0	2045	// check if the variable value is the empty string, as that means
michael@0	2046	// that the variable was invalid at computed value time due to
michael@0	2047	// unresolveable variable references or cycles.
michael@0	2048	nsString variableValue;
michael@0	2049	nsCSSTokenSerializationType varFirstToken, varLastToken;
michael@0	2050	bool valid = aVariables->Get(variableName, variableValue,
michael@0	2051	varFirstToken, varLastToken) &&
michael@0	2052	!variableValue.IsEmpty();
michael@0	2053
michael@0	2054	if (!GetToken(true) ||
michael@0	2055	mToken.IsSymbol(')')) {
michael@0	2056	mScanner->StartRecording();
michael@0	2057	if (!valid) {
michael@0	2058	// Invalid variable with no fallback.
michael@0	2059	return false;
michael@0	2060	}
michael@0	2061	// Valid variable with no fallback.
michael@0	2062	AppendTokens(value, valueFirstToken, valueLastToken,
michael@0	2063	varFirstToken, varLastToken, variableValue);
michael@0	2064	} else if (mToken.IsSymbol(',')) {
michael@0	2065	mScanner->StartRecording();
michael@0	2066	if (!GetToken(false) ||
michael@0	2067	mToken.IsSymbol(')')) {
michael@0	2068	// Comma must be followed by at least one fallback token.
michael@0	2069	return false;
michael@0	2070	}
michael@0	2071	UngetToken();
michael@0	2072	if (valid) {
michael@0	2073	// Valid variable with ignored fallback.
michael@0	2074	mScanner->StopRecording();
michael@0	2075	AppendTokens(value, valueFirstToken, valueLastToken,
michael@0	2076	varFirstToken, varLastToken, variableValue);
michael@0	2077	bool ok = SkipBalancedContentUntil(')');
michael@0	2078	mScanner->StartRecording();
michael@0	2079	if (!ok) {
michael@0	2080	return false;
michael@0	2081	}
michael@0	2082	} else {
michael@0	2083	nsString fallback;
michael@0	2084	if (!ResolveValueWithVariableReferencesRec(fallback,
michael@0	2085	varFirstToken,
michael@0	2086	varLastToken,
michael@0	2087	aVariables)) {
michael@0	2088	// Fallback value had invalid tokens or an invalid variable reference
michael@0	2089	// that itself had no fallback.
michael@0	2090	return false;
michael@0	2091	}
michael@0	2092	AppendTokens(value, valueFirstToken, valueLastToken,
michael@0	2093	varFirstToken, varLastToken, fallback);
michael@0	2094	// Now we're either at the pushed back ')' that finished the
michael@0	2095	// fallback or at EOF.
michael@0	2096	DebugOnly<bool> gotToken = GetToken(false);
michael@0	2097	MOZ_ASSERT(!gotToken || mToken.IsSymbol(')'));
michael@0	2098	}
michael@0	2099	} else {
michael@0	2100	// Expected ',' or ')' after the variable name.
michael@0	2101	mScanner->StartRecording();
michael@0	2102	return false;
michael@0	2103	}
michael@0	2104	} else {
michael@0	2105	stack.AppendElement(')');
michael@0	2106	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Function);
michael@0	2107	}
michael@0	2108	break;
michael@0	2109
michael@0	2110	case eCSSToken_Bad_String:
michael@0	2111	case eCSSToken_Bad_URL:
michael@0	2112	return false;
michael@0	2113
michael@0	2114	case eCSSToken_Whitespace:
michael@0	2115	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Whitespace);
michael@0	2116	break;
michael@0	2117
michael@0	2118	case eCSSToken_AtKeyword:
michael@0	2119	case eCSSToken_Hash:
michael@0	2120	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_AtKeyword_or_Hash);
michael@0	2121	break;
michael@0	2122
michael@0	2123	case eCSSToken_Number:
michael@0	2124	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Number);
michael@0	2125	break;
michael@0	2126
michael@0	2127	case eCSSToken_Dimension:
michael@0	2128	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Dimension);
michael@0	2129	break;
michael@0	2130
michael@0	2131	case eCSSToken_Ident:
michael@0	2132	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Ident);
michael@0	2133	break;
michael@0	2134
michael@0	2135	case eCSSToken_Percentage:
michael@0	2136	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Percentage);
michael@0	2137	break;
michael@0	2138
michael@0	2139	case eCSSToken_URange:
michael@0	2140	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_URange);
michael@0	2141	break;
michael@0	2142
michael@0	2143	case eCSSToken_URL:
michael@0	2144	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_URL_or_BadURL);
michael@0	2145	break;
michael@0	2146
michael@0	2147	case eCSSToken_HTMLComment:
michael@0	2148	if (mToken.mIdent[0] == '-') {
michael@0	2149	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_CDC);
michael@0	2150	} else {
michael@0	2151	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Other);
michael@0	2152	}
michael@0	2153	break;
michael@0	2154
michael@0	2155	case eCSSToken_Dashmatch:
michael@0	2156	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_DashMatch);
michael@0	2157	break;
michael@0	2158
michael@0	2159	case eCSSToken_Containsmatch:
michael@0	2160	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_ContainsMatch);
michael@0	2161	break;
michael@0	2162
michael@0	2163	default:
michael@0	2164	NS_NOTREACHED("unexpected token type");
michael@0	2165	// fall through
michael@0	2166	case eCSSToken_ID:
michael@0	2167	case eCSSToken_String:
michael@0	2168	case eCSSToken_Includes:
michael@0	2169	case eCSSToken_Beginsmatch:
michael@0	2170	case eCSSToken_Endsmatch:
michael@0	2171	UPDATE_RECORDING_TOKENS(eCSSTokenSerialization_Other);
michael@0	2172	break;
michael@0	2173	}
michael@0	2174
michael@0	2175	lengthBeforeVar = mScanner->RecordingLength();
michael@0	2176	}
michael@0	2177
michael@0	2178	#undef UPDATE_RECORDING_TOKENS
michael@0	2179
michael@0	2180	aResult.Append(value);
michael@0	2181	StopRecordingAndAppendTokens(aResult, valueFirstToken, valueLastToken,
michael@0	2182	recFirstToken, recLastToken, mScanner);
michael@0	2183
michael@0	2184	// Append any implicitly closed brackets.
michael@0	2185	if (!stack.IsEmpty()) {
michael@0	2186	do {
michael@0	2187	aResult.Append(stack.LastElement());
michael@0	2188	stack.TruncateLength(stack.Length() - 1);
michael@0	2189	} while (!stack.IsEmpty());
michael@0	2190	valueLastToken = eCSSTokenSerialization_Other;
michael@0	2191	}
michael@0	2192
michael@0	2193	mScanner->StartRecording();
michael@0	2194	aResultFirstToken = valueFirstToken;
michael@0	2195	aResultLastToken = valueLastToken;
michael@0	2196	return true;
michael@0	2197	}
michael@0	2198
michael@0	2199	bool
michael@0	2200	CSSParserImpl::ResolveValueWithVariableReferences(
michael@0	2201	const CSSVariableValues* aVariables,
michael@0	2202	nsString& aResult,
michael@0	2203	nsCSSTokenSerializationType& aFirstToken,
michael@0	2204	nsCSSTokenSerializationType& aLastToken)
michael@0	2205	{
michael@0	2206	aResult.Truncate(0);
michael@0	2207
michael@0	2208	// Start recording before we read the first token.
michael@0	2209	mScanner->StartRecording();
michael@0	2210
michael@0	2211	if (!GetToken(false)) {
michael@0	2212	// Value was empty since we reached EOF.
michael@0	2213	mScanner->StopRecording();
michael@0	2214	return false;
michael@0	2215	}
michael@0	2216
michael@0	2217	UngetToken();
michael@0	2218
michael@0	2219	nsString value;
michael@0	2220	nsCSSTokenSerializationType firstToken, lastToken;
michael@0	2221	bool ok = ResolveValueWithVariableReferencesRec(value, firstToken, lastToken, aVariables) &&
michael@0	2222	!GetToken(true);
michael@0	2223
michael@0	2224	mScanner->StopRecording();
michael@0	2225
michael@0	2226	if (ok) {
michael@0	2227	aResult = value;
michael@0	2228	aFirstToken = firstToken;
michael@0	2229	aLastToken = lastToken;
michael@0	2230	}
michael@0	2231	return ok;
michael@0	2232	}
michael@0	2233
michael@0	2234	bool
michael@0	2235	CSSParserImpl::ResolveVariableValue(const nsAString& aPropertyValue,
michael@0	2236	const CSSVariableValues* aVariables,
michael@0	2237	nsString& aResult,
michael@0	2238	nsCSSTokenSerializationType& aFirstToken,
michael@0	2239	nsCSSTokenSerializationType& aLastToken)
michael@0	2240	{
michael@0	2241	nsCSSScanner scanner(aPropertyValue, 0);
michael@0	2242
michael@0	2243	// At this point, we know that aPropertyValue is syntactically correct
michael@0	2244	// for a token stream that has variable references. We also won't be
michael@0	2245	// interpreting any of the stream as we parse it, apart from expanding
michael@0	2246	// var() references, so we don't need a base URL etc. or any useful
michael@0	2247	// error reporting.
michael@0	2248	css::ErrorReporter reporter(scanner, nullptr, nullptr, nullptr);
michael@0	2249	InitScanner(scanner, reporter, nullptr, nullptr, nullptr);
michael@0	2250
michael@0	2251	bool valid = ResolveValueWithVariableReferences(aVariables, aResult,
michael@0	2252	aFirstToken, aLastToken);
michael@0	2253
michael@0	2254	ReleaseScanner();
michael@0	2255	return valid;
michael@0	2256	}
michael@0	2257
michael@0	2258	void
michael@0	2259	CSSParserImpl::ParsePropertyWithVariableReferences(
michael@0	2260	nsCSSProperty aPropertyID,
michael@0	2261	nsCSSProperty aShorthandPropertyID,
michael@0	2262	const nsAString& aValue,
michael@0	2263	const CSSVariableValues* aVariables,
michael@0	2264	nsRuleData* aRuleData,
michael@0	2265	nsIURI* aDocURL,
michael@0	2266	nsIURI* aBaseURL,
michael@0	2267	nsIPrincipal* aDocPrincipal,
michael@0	2268	nsCSSStyleSheet* aSheet,
michael@0	2269	uint32_t aLineNumber,
michael@0	2270	uint32_t aLineOffset)
michael@0	2271	{
michael@0	2272	mTempData.AssertInitialState();
michael@0	2273
michael@0	2274	bool valid;
michael@0	2275	nsString expandedValue;
michael@0	2276
michael@0	2277	// Resolve any variable references in the property value.
michael@0	2278	{
michael@0	2279	nsCSSScanner scanner(aValue, 0);
michael@0	2280	css::ErrorReporter reporter(scanner, aSheet, mChildLoader, aDocURL);
michael@0	2281	InitScanner(scanner, reporter, aDocURL, aBaseURL, aDocPrincipal);
michael@0	2282
michael@0	2283	nsCSSTokenSerializationType firstToken, lastToken;
michael@0	2284	valid = ResolveValueWithVariableReferences(aVariables, expandedValue,
michael@0	2285	firstToken, lastToken);
michael@0	2286	if (!valid) {
michael@0	2287	NS_ConvertASCIItoUTF16 propName(nsCSSProps::GetStringValue(aPropertyID));
michael@0	2288	REPORT_UNEXPECTED(PEInvalidVariableReference);
michael@0	2289	REPORT_UNEXPECTED_P(PEValueParsingError, propName);
michael@0	2290	if (nsCSSProps::IsInherited(aPropertyID)) {
michael@0	2291	REPORT_UNEXPECTED(PEValueWithVariablesFallbackInherit);
michael@0	2292	} else {
michael@0	2293	REPORT_UNEXPECTED(PEValueWithVariablesFallbackInitial);
michael@0	2294	}
michael@0	2295	OUTPUT_ERROR_WITH_POSITION(aLineNumber, aLineOffset);
michael@0	2296	}
michael@0	2297	ReleaseScanner();
michael@0	2298	}
michael@0	2299
michael@0	2300	nsCSSProperty propertyToParse =
michael@0	2301	aShorthandPropertyID != eCSSProperty_UNKNOWN ? aShorthandPropertyID :
michael@0	2302	aPropertyID;
michael@0	2303
michael@0	2304	// Parse the property with that resolved value.
michael@0	2305	if (valid) {
michael@0	2306	nsCSSScanner scanner(expandedValue, 0);
michael@0	2307	css::ErrorReporter reporter(scanner, aSheet, mChildLoader, aDocURL);
michael@0	2308	InitScanner(scanner, reporter, aDocURL, aBaseURL, aDocPrincipal);
michael@0	2309	valid = ParseProperty(propertyToParse);
michael@0	2310	if (valid && GetToken(true)) {
michael@0	2311	REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
michael@0	2312	valid = false;
michael@0	2313	}
michael@0	2314	if (!valid) {
michael@0	2315	NS_ConvertASCIItoUTF16 propName(nsCSSProps::GetStringValue(
michael@0	2316	propertyToParse));
michael@0	2317	REPORT_UNEXPECTED_P(PEValueWithVariablesParsingError, propName);
michael@0	2318	if (nsCSSProps::IsInherited(aPropertyID)) {
michael@0	2319	REPORT_UNEXPECTED(PEValueWithVariablesFallbackInherit);
michael@0	2320	} else {
michael@0	2321	REPORT_UNEXPECTED(PEValueWithVariablesFallbackInitial);
michael@0	2322	}
michael@0	2323	OUTPUT_ERROR_WITH_POSITION(aLineNumber, aLineOffset);
michael@0	2324	}
michael@0	2325	ReleaseScanner();
michael@0	2326	}
michael@0	2327
michael@0	2328	// If the property could not be parsed with the resolved value, then we
michael@0	2329	// treat it as if the value were 'initial' or 'inherit', depending on whether
michael@0	2330	// the property is an inherited property.
michael@0	2331	if (!valid) {
michael@0	2332	nsCSSValue defaultValue;
michael@0	2333	if (nsCSSProps::IsInherited(aPropertyID)) {
michael@0	2334	defaultValue.SetInheritValue();
michael@0	2335	} else {
michael@0	2336	defaultValue.SetInitialValue();
michael@0	2337	}
michael@0	2338	mTempData.AddLonghandProperty(aPropertyID, defaultValue);
michael@0	2339	}
michael@0	2340
michael@0	2341	// Copy the property value into the rule data.
michael@0	2342	mTempData.MapRuleInfoInto(aPropertyID, aRuleData);
michael@0	2343
michael@0	2344	mTempData.ClearProperty(propertyToParse);
michael@0	2345	mTempData.AssertInitialState();
michael@0	2346	}
michael@0	2347
michael@0	2348	//----------------------------------------------------------------------
michael@0	2349
michael@0	2350	bool
michael@0	2351	CSSParserImpl::GetToken(bool aSkipWS)
michael@0	2352	{
michael@0	2353	if (mHavePushBack) {
michael@0	2354	mHavePushBack = false;
michael@0	2355	if (!aSkipWS || mToken.mType != eCSSToken_Whitespace) {
michael@0	2356	return true;
michael@0	2357	}
michael@0	2358	}
michael@0	2359	return mScanner->Next(mToken, aSkipWS);
michael@0	2360	}
michael@0	2361
michael@0	2362	void
michael@0	2363	CSSParserImpl::UngetToken()
michael@0	2364	{
michael@0	2365	NS_PRECONDITION(!mHavePushBack, "double pushback");
michael@0	2366	mHavePushBack = true;
michael@0	2367	}
michael@0	2368
michael@0	2369	bool
michael@0	2370	CSSParserImpl::GetNextTokenLocation(bool aSkipWS, uint32_t *linenum, uint32_t *colnum)
michael@0	2371	{
michael@0	2372	// Peek at next token so that mScanner updates line and column vals
michael@0	2373	if (!GetToken(aSkipWS)) {
michael@0	2374	return false;
michael@0	2375	}
michael@0	2376	UngetToken();
michael@0	2377	// The scanner uses one-indexing for line numbers but zero-indexing
michael@0	2378	// for column numbers.
michael@0	2379	*linenum = mScanner->GetLineNumber();
michael@0	2380	*colnum = 1 + mScanner->GetColumnNumber();
michael@0	2381	return true;
michael@0	2382	}
michael@0	2383
michael@0	2384	bool
michael@0	2385	CSSParserImpl::ExpectSymbol(char16_t aSymbol,
michael@0	2386	bool aSkipWS)
michael@0	2387	{
michael@0	2388	if (!GetToken(aSkipWS)) {
michael@0	2389	// CSS2.1 specifies that all "open constructs" are to be closed at
michael@0	2390	// EOF. It simplifies higher layers if we claim to have found an
michael@0	2391	// ), ], }, or ; if we encounter EOF while looking for one of them.
michael@0	2392	// Do still issue a diagnostic, to aid debugging.
michael@0	2393	if (aSymbol == ')' || aSymbol == ']' ||
michael@0	2394	aSymbol == '}' || aSymbol == ';') {
michael@0	2395	REPORT_UNEXPECTED_EOF_CHAR(aSymbol);
michael@0	2396	return true;
michael@0	2397	}
michael@0	2398	else
michael@0	2399	return false;
michael@0	2400	}
michael@0	2401	if (mToken.IsSymbol(aSymbol)) {
michael@0	2402	return true;
michael@0	2403	}
michael@0	2404	UngetToken();
michael@0	2405	return false;
michael@0	2406	}
michael@0	2407
michael@0	2408	// Checks to see if we're at the end of a property. If an error occurs during
michael@0	2409	// the check, does not signal a parse error.
michael@0	2410	bool
michael@0	2411	CSSParserImpl::CheckEndProperty()
michael@0	2412	{
michael@0	2413	if (!GetToken(true)) {
michael@0	2414	return true; // properties may end with eof
michael@0	2415	}
michael@0	2416	if ((eCSSToken_Symbol == mToken.mType) &&
michael@0	2417	((';' == mToken.mSymbol) ||
michael@0	2418	('!' == mToken.mSymbol) ||
michael@0	2419	('}' == mToken.mSymbol) ||
michael@0	2420	(')' == mToken.mSymbol))) {
michael@0	2421	// XXX need to verify that ! is only followed by "important [;|}]
michael@0	2422	// XXX this requires a multi-token pushback buffer
michael@0	2423	UngetToken();
michael@0	2424	return true;
michael@0	2425	}
michael@0	2426	UngetToken();
michael@0	2427	return false;
michael@0	2428	}
michael@0	2429
michael@0	2430	// Checks if we're at the end of a property, raising an error if we're not.
michael@0	2431	bool
michael@0	2432	CSSParserImpl::ExpectEndProperty()
michael@0	2433	{
michael@0	2434	if (CheckEndProperty())
michael@0	2435	return true;
michael@0	2436
michael@0	2437	// If we're here, we read something incorrect, so we should report it.
michael@0	2438	REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
michael@0	2439	return false;
michael@0	2440	}
michael@0	2441
michael@0	2442	// Parses the priority suffix on a property, which at present may be
michael@0	2443	// either '!important' or nothing.
michael@0	2444	CSSParserImpl::PriorityParsingStatus
michael@0	2445	CSSParserImpl::ParsePriority()
michael@0	2446	{
michael@0	2447	if (!GetToken(true)) {
michael@0	2448	return ePriority_None; // properties may end with EOF
michael@0	2449	}
michael@0	2450	if (!mToken.IsSymbol('!')) {
michael@0	2451	UngetToken();
michael@0	2452	return ePriority_None; // dunno what it is, but it's not a priority
michael@0	2453	}
michael@0	2454
michael@0	2455	if (!GetToken(true)) {
michael@0	2456	// EOF is not ok after !
michael@0	2457	REPORT_UNEXPECTED_EOF(PEImportantEOF);
michael@0	2458	return ePriority_Error;
michael@0	2459	}
michael@0	2460
michael@0	2461	if (mToken.mType != eCSSToken_Ident ||
michael@0	2462	!mToken.mIdent.LowerCaseEqualsLiteral("important")) {
michael@0	2463	REPORT_UNEXPECTED_TOKEN(PEExpectedImportant);
michael@0	2464	UngetToken();
michael@0	2465	return ePriority_Error;
michael@0	2466	}
michael@0	2467
michael@0	2468	return ePriority_Important;
michael@0	2469	}
michael@0	2470
michael@0	2471	nsSubstring*
michael@0	2472	CSSParserImpl::NextIdent()
michael@0	2473	{
michael@0	2474	// XXX Error reporting?
michael@0	2475	if (!GetToken(true)) {
michael@0	2476	return nullptr;
michael@0	2477	}
michael@0	2478	if (eCSSToken_Ident != mToken.mType) {
michael@0	2479	UngetToken();
michael@0	2480	return nullptr;
michael@0	2481	}
michael@0	2482	return &mToken.mIdent;
michael@0	2483	}
michael@0	2484
michael@0	2485	bool
michael@0	2486	CSSParserImpl::SkipAtRule(bool aInsideBlock)
michael@0	2487	{
michael@0	2488	for (;;) {
michael@0	2489	if (!GetToken(true)) {
michael@0	2490	REPORT_UNEXPECTED_EOF(PESkipAtRuleEOF2);
michael@0	2491	return false;
michael@0	2492	}
michael@0	2493	if (eCSSToken_Symbol == mToken.mType) {
michael@0	2494	char16_t symbol = mToken.mSymbol;
michael@0	2495	if (symbol == ';') {
michael@0	2496	break;
michael@0	2497	}
michael@0	2498	if (aInsideBlock && symbol == '}') {
michael@0	2499	// The closing } doesn't belong to us.
michael@0	2500	UngetToken();
michael@0	2501	break;
michael@0	2502	}
michael@0	2503	if (symbol == '{') {
michael@0	2504	SkipUntil('}');
michael@0	2505	break;
michael@0	2506	} else if (symbol == '(') {
michael@0	2507	SkipUntil(')');
michael@0	2508	} else if (symbol == '[') {
michael@0	2509	SkipUntil(']');
michael@0	2510	}
michael@0	2511	} else if (eCSSToken_Function == mToken.mType ||
michael@0	2512	eCSSToken_Bad_URL == mToken.mType) {
michael@0	2513	SkipUntil(')');
michael@0	2514	}
michael@0	2515	}
michael@0	2516	return true;
michael@0	2517	}
michael@0	2518
michael@0	2519	bool
michael@0	2520	CSSParserImpl::ParseAtRule(RuleAppendFunc aAppendFunc,
michael@0	2521	void* aData,
michael@0	2522	bool aInAtRule)
michael@0	2523	{
michael@0	2524
michael@0	2525	nsCSSSection newSection;
michael@0	2526	bool (CSSParserImpl::*parseFunc)(RuleAppendFunc, void*);
michael@0	2527
michael@0	2528	if ((mSection <= eCSSSection_Charset) &&
michael@0	2529	(mToken.mIdent.LowerCaseEqualsLiteral("charset"))) {
michael@0	2530	parseFunc = &CSSParserImpl::ParseCharsetRule;
michael@0	2531	newSection = eCSSSection_Import; // only one charset allowed
michael@0	2532
michael@0	2533	} else if ((mSection <= eCSSSection_Import) &&
michael@0	2534	mToken.mIdent.LowerCaseEqualsLiteral("import")) {
michael@0	2535	parseFunc = &CSSParserImpl::ParseImportRule;
michael@0	2536	newSection = eCSSSection_Import;
michael@0	2537
michael@0	2538	} else if ((mSection <= eCSSSection_NameSpace) &&
michael@0	2539	mToken.mIdent.LowerCaseEqualsLiteral("namespace")) {
michael@0	2540	parseFunc = &CSSParserImpl::ParseNameSpaceRule;
michael@0	2541	newSection = eCSSSection_NameSpace;
michael@0	2542
michael@0	2543	} else if (mToken.mIdent.LowerCaseEqualsLiteral("media")) {
michael@0	2544	parseFunc = &CSSParserImpl::ParseMediaRule;
michael@0	2545	newSection = eCSSSection_General;
michael@0	2546
michael@0	2547	} else if (mToken.mIdent.LowerCaseEqualsLiteral("-moz-document")) {
michael@0	2548	parseFunc = &CSSParserImpl::ParseMozDocumentRule;
michael@0	2549	newSection = eCSSSection_General;
michael@0	2550
michael@0	2551	} else if (mToken.mIdent.LowerCaseEqualsLiteral("font-face")) {
michael@0	2552	parseFunc = &CSSParserImpl::ParseFontFaceRule;
michael@0	2553	newSection = eCSSSection_General;
michael@0	2554
michael@0	2555	} else if (mToken.mIdent.LowerCaseEqualsLiteral("font-feature-values") &&
michael@0	2556	nsCSSFontFeatureValuesRule::PrefEnabled()) {
michael@0	2557	parseFunc = &CSSParserImpl::ParseFontFeatureValuesRule;
michael@0	2558	newSection = eCSSSection_General;
michael@0	2559
michael@0	2560	} else if (mToken.mIdent.LowerCaseEqualsLiteral("page")) {
michael@0	2561	parseFunc = &CSSParserImpl::ParsePageRule;
michael@0	2562	newSection = eCSSSection_General;
michael@0	2563
michael@0	2564	} else if ((nsCSSProps::IsEnabled(eCSSPropertyAlias_MozAnimation) &&
michael@0	2565	mToken.mIdent.LowerCaseEqualsLiteral("-moz-keyframes")) ||
michael@0	2566	mToken.mIdent.LowerCaseEqualsLiteral("keyframes")) {
michael@0	2567	parseFunc = &CSSParserImpl::ParseKeyframesRule;
michael@0	2568	newSection = eCSSSection_General;
michael@0	2569
michael@0	2570	} else if (mToken.mIdent.LowerCaseEqualsLiteral("supports") &&
michael@0	2571	CSSSupportsRule::PrefEnabled()) {
michael@0	2572	parseFunc = &CSSParserImpl::ParseSupportsRule;
michael@0	2573	newSection = eCSSSection_General;
michael@0	2574
michael@0	2575	} else {
michael@0	2576	if (!NonMozillaVendorIdentifier(mToken.mIdent)) {
michael@0	2577	REPORT_UNEXPECTED_TOKEN(PEUnknownAtRule);
michael@0	2578	OUTPUT_ERROR();
michael@0	2579	}
michael@0	2580	// Skip over unsupported at rule, don't advance section
michael@0	2581	return SkipAtRule(aInAtRule);
michael@0	2582	}
michael@0	2583
michael@0	2584	// Inside of @-rules, only the rules that can occur anywhere
michael@0	2585	// are allowed.
michael@0	2586	bool unnestable = aInAtRule && newSection != eCSSSection_General;
michael@0	2587	if (unnestable) {
michael@0	2588	REPORT_UNEXPECTED_TOKEN(PEGroupRuleNestedAtRule);
michael@0	2589	}
michael@0	2590
michael@0	2591	if (unnestable || !(this->*parseFunc)(aAppendFunc, aData)) {
michael@0	2592	// Skip over invalid at rule, don't advance section
michael@0	2593	OUTPUT_ERROR();
michael@0	2594	return SkipAtRule(aInAtRule);
michael@0	2595	}
michael@0	2596
michael@0	2597	// Nested @-rules don't affect the top-level rule chain requirement
michael@0	2598	if (!aInAtRule) {
michael@0	2599	mSection = newSection;
michael@0	2600	}
michael@0	2601
michael@0	2602	return true;
michael@0	2603	}
michael@0	2604
michael@0	2605	bool
michael@0	2606	CSSParserImpl::ParseCharsetRule(RuleAppendFunc aAppendFunc,
michael@0	2607	void* aData)
michael@0	2608	{
michael@0	2609	if (!GetToken(true)) {
michael@0	2610	REPORT_UNEXPECTED_EOF(PECharsetRuleEOF);
michael@0	2611	return false;
michael@0	2612	}
michael@0	2613
michael@0	2614	if (eCSSToken_String != mToken.mType) {
michael@0	2615	UngetToken();
michael@0	2616	REPORT_UNEXPECTED_TOKEN(PECharsetRuleNotString);
michael@0	2617	return false;
michael@0	2618	}
michael@0	2619
michael@0	2620	nsAutoString charset = mToken.mIdent;
michael@0	2621
michael@0	2622	if (!ExpectSymbol(';', true)) {
michael@0	2623	return false;
michael@0	2624	}
michael@0	2625
michael@0	2626	nsRefPtr<css::CharsetRule> rule = new css::CharsetRule(charset);
michael@0	2627	(*aAppendFunc)(rule, aData);
michael@0	2628
michael@0	2629	return true;
michael@0	2630	}
michael@0	2631
michael@0	2632	bool
michael@0	2633	CSSParserImpl::ParseURLOrString(nsString& aURL)
michael@0	2634	{
michael@0	2635	if (!GetToken(true)) {
michael@0	2636	return false;
michael@0	2637	}
michael@0	2638	if (eCSSToken_String == mToken.mType || eCSSToken_URL == mToken.mType) {
michael@0	2639	aURL = mToken.mIdent;
michael@0	2640	return true;
michael@0	2641	}
michael@0	2642	UngetToken();
michael@0	2643	return false;
michael@0	2644	}
michael@0	2645
michael@0	2646	bool
michael@0	2647	CSSParserImpl::ParseMediaQuery(bool aInAtRule,
michael@0	2648	nsMediaQuery **aQuery,
michael@0	2649	bool *aHitStop)
michael@0	2650	{
michael@0	2651	*aQuery = nullptr;
michael@0	2652	*aHitStop = false;
michael@0	2653
michael@0	2654	// "If the comma-separated list is the empty list it is assumed to
michael@0	2655	// specify the media query 'all'." (css3-mediaqueries, section
michael@0	2656	// "Media Queries")
michael@0	2657	if (!GetToken(true)) {
michael@0	2658	*aHitStop = true;
michael@0	2659	// expected termination by EOF
michael@0	2660	if (!aInAtRule)
michael@0	2661	return true;
michael@0	2662
michael@0	2663	// unexpected termination by EOF
michael@0	2664	REPORT_UNEXPECTED_EOF(PEGatherMediaEOF);
michael@0	2665	return true;
michael@0	2666	}
michael@0	2667
michael@0	2668	if (eCSSToken_Symbol == mToken.mType && aInAtRule &&
michael@0	2669	(mToken.mSymbol == ';' || mToken.mSymbol == '{' || mToken.mSymbol == '}' )) {
michael@0	2670	*aHitStop = true;
michael@0	2671	UngetToken();
michael@0	2672	return true;
michael@0	2673	}
michael@0	2674	UngetToken();
michael@0	2675
michael@0	2676	nsMediaQuery* query = new nsMediaQuery;
michael@0	2677	*aQuery = query;
michael@0	2678
michael@0	2679	if (ExpectSymbol('(', true)) {
michael@0	2680	// we got an expression without a media type
michael@0	2681	UngetToken(); // so ParseMediaQueryExpression can handle it
michael@0	2682	query->SetType(nsGkAtoms::all);
michael@0	2683	query->SetTypeOmitted();
michael@0	2684	// Just parse the first expression here.
michael@0	2685	if (!ParseMediaQueryExpression(query)) {
michael@0	2686	OUTPUT_ERROR();
michael@0	2687	query->SetHadUnknownExpression();
michael@0	2688	}
michael@0	2689	} else {
michael@0	2690	nsCOMPtr<nsIAtom> mediaType;
michael@0	2691	bool gotNotOrOnly = false;
michael@0	2692	for (;;) {
michael@0	2693	if (!GetToken(true)) {
michael@0	2694	REPORT_UNEXPECTED_EOF(PEGatherMediaEOF);
michael@0	2695	return false;
michael@0	2696	}
michael@0	2697	if (eCSSToken_Ident != mToken.mType) {
michael@0	2698	REPORT_UNEXPECTED_TOKEN(PEGatherMediaNotIdent);
michael@0	2699	UngetToken();
michael@0	2700	return false;
michael@0	2701	}
michael@0	2702	// case insensitive from CSS - must be lower cased
michael@0	2703	nsContentUtils::ASCIIToLower(mToken.mIdent);
michael@0	2704	mediaType = do_GetAtom(mToken.mIdent);
michael@0	2705	if (!mediaType) {
michael@0	2706	NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
michael@0	2707	}
michael@0	2708	if (!gotNotOrOnly && mediaType == nsGkAtoms::_not) {
michael@0	2709	gotNotOrOnly = true;
michael@0	2710	query->SetNegated();
michael@0	2711	} else if (!gotNotOrOnly && mediaType == nsGkAtoms::only) {
michael@0	2712	gotNotOrOnly = true;
michael@0	2713	query->SetHasOnly();
michael@0	2714	} else if (mediaType == nsGkAtoms::_not ||
michael@0	2715	mediaType == nsGkAtoms::only ||
michael@0	2716	mediaType == nsGkAtoms::_and ||
michael@0	2717	mediaType == nsGkAtoms::_or) {
michael@0	2718	REPORT_UNEXPECTED_TOKEN(PEGatherMediaReservedMediaType);
michael@0	2719	UngetToken();
michael@0	2720	return false;
michael@0	2721	} else {
michael@0	2722	// valid media type
michael@0	2723	break;
michael@0	2724	}
michael@0	2725	}
michael@0	2726	query->SetType(mediaType);
michael@0	2727	}
michael@0	2728
michael@0	2729	for (;;) {
michael@0	2730	if (!GetToken(true)) {
michael@0	2731	*aHitStop = true;
michael@0	2732	// expected termination by EOF
michael@0	2733	if (!aInAtRule)
michael@0	2734	break;
michael@0	2735
michael@0	2736	// unexpected termination by EOF
michael@0	2737	REPORT_UNEXPECTED_EOF(PEGatherMediaEOF);
michael@0	2738	break;
michael@0	2739	}
michael@0	2740
michael@0	2741	if (eCSSToken_Symbol == mToken.mType && aInAtRule &&
michael@0	2742	(mToken.mSymbol == ';' || mToken.mSymbol == '{' || mToken.mSymbol == '}')) {
michael@0	2743	*aHitStop = true;
michael@0	2744	UngetToken();
michael@0	2745	break;
michael@0	2746	}
michael@0	2747	if (eCSSToken_Symbol == mToken.mType && mToken.mSymbol == ',') {
michael@0	2748	// Done with the expressions for this query
michael@0	2749	break;
michael@0	2750	}
michael@0	2751	if (eCSSToken_Ident != mToken.mType ||
michael@0	2752	!mToken.mIdent.LowerCaseEqualsLiteral("and")) {
michael@0	2753	REPORT_UNEXPECTED_TOKEN(PEGatherMediaNotComma);
michael@0	2754	UngetToken();
michael@0	2755	return false;
michael@0	2756	}
michael@0	2757	if (!ParseMediaQueryExpression(query)) {
michael@0	2758	OUTPUT_ERROR();
michael@0	2759	query->SetHadUnknownExpression();
michael@0	2760	}
michael@0	2761	}
michael@0	2762	return true;
michael@0	2763	}
michael@0	2764
michael@0	2765	// Returns false only when there is a low-level error in the scanner
michael@0	2766	// (out-of-memory).
michael@0	2767	bool
michael@0	2768	CSSParserImpl::GatherMedia(nsMediaList* aMedia,
michael@0	2769	bool aInAtRule)
michael@0	2770	{
michael@0	2771	for (;;) {
michael@0	2772	nsAutoPtr<nsMediaQuery> query;
michael@0	2773	bool hitStop;
michael@0	2774	if (!ParseMediaQuery(aInAtRule, getter_Transfers(query),
michael@0	2775	&hitStop)) {
michael@0	2776	NS_ASSERTION(!hitStop, "should return true when hit stop");
michael@0	2777	OUTPUT_ERROR();
michael@0	2778	if (query) {
michael@0	2779	query->SetHadUnknownExpression();
michael@0	2780	}
michael@0	2781	if (aInAtRule) {
michael@0	2782	const char16_t stopChars[] =
michael@0	2783	{ char16_t(','), char16_t('{'), char16_t(';'), char16_t('}'), char16_t(0) };
michael@0	2784	SkipUntilOneOf(stopChars);
michael@0	2785	} else {
michael@0	2786	SkipUntil(',');
michael@0	2787	}
michael@0	2788	// Rely on SkipUntilOneOf leaving mToken around as the last token read.
michael@0	2789	if (mToken.mType == eCSSToken_Symbol && aInAtRule &&
michael@0	2790	(mToken.mSymbol == '{' || mToken.mSymbol == ';' || mToken.mSymbol == '}')) {
michael@0	2791	UngetToken();
michael@0	2792	hitStop = true;
michael@0	2793	}
michael@0	2794	}
michael@0	2795	if (query) {
michael@0	2796	aMedia->AppendQuery(query);
michael@0	2797	}
michael@0	2798	if (hitStop) {
michael@0	2799	break;
michael@0	2800	}
michael@0	2801	}
michael@0	2802	return true;
michael@0	2803	}
michael@0	2804
michael@0	2805	bool
michael@0	2806	CSSParserImpl::ParseMediaQueryExpression(nsMediaQuery* aQuery)
michael@0	2807	{
michael@0	2808	if (!ExpectSymbol('(', true)) {
michael@0	2809	REPORT_UNEXPECTED_TOKEN(PEMQExpectedExpressionStart);
michael@0	2810	return false;
michael@0	2811	}
michael@0	2812	if (! GetToken(true)) {
michael@0	2813	REPORT_UNEXPECTED_EOF(PEMQExpressionEOF);
michael@0	2814	return false;
michael@0	2815	}
michael@0	2816	if (eCSSToken_Ident != mToken.mType) {
michael@0	2817	REPORT_UNEXPECTED_TOKEN(PEMQExpectedFeatureName);
michael@0	2818	UngetToken();
michael@0	2819	SkipUntil(')');
michael@0	2820	return false;
michael@0	2821	}
michael@0	2822
michael@0	2823	nsMediaExpression *expr = aQuery->NewExpression();
michael@0	2824
michael@0	2825	// case insensitive from CSS - must be lower cased
michael@0	2826	nsContentUtils::ASCIIToLower(mToken.mIdent);
michael@0	2827	const char16_t *featureString;
michael@0	2828	if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("min-"))) {
michael@0	2829	expr->mRange = nsMediaExpression::eMin;
michael@0	2830	featureString = mToken.mIdent.get() + 4;
michael@0	2831	} else if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("max-"))) {
michael@0	2832	expr->mRange = nsMediaExpression::eMax;
michael@0	2833	featureString = mToken.mIdent.get() + 4;
michael@0	2834	} else {
michael@0	2835	expr->mRange = nsMediaExpression::eEqual;
michael@0	2836	featureString = mToken.mIdent.get();
michael@0	2837	}
michael@0	2838
michael@0	2839	nsCOMPtr<nsIAtom> mediaFeatureAtom = do_GetAtom(featureString);
michael@0	2840	if (!mediaFeatureAtom) {
michael@0	2841	NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
michael@0	2842	}
michael@0	2843	const nsMediaFeature *feature = nsMediaFeatures::features;
michael@0	2844	for (; feature->mName; ++feature) {
michael@0	2845	if (*(feature->mName) == mediaFeatureAtom) {
michael@0	2846	break;
michael@0	2847	}
michael@0	2848	}
michael@0	2849	if (!feature->mName ||
michael@0	2850	(expr->mRange != nsMediaExpression::eEqual &&
michael@0	2851	feature->mRangeType != nsMediaFeature::eMinMaxAllowed)) {
michael@0	2852	REPORT_UNEXPECTED_TOKEN(PEMQExpectedFeatureName);
michael@0	2853	SkipUntil(')');
michael@0	2854	return false;
michael@0	2855	}
michael@0	2856	expr->mFeature = feature;
michael@0	2857
michael@0	2858	if (!GetToken(true) || mToken.IsSymbol(')')) {
michael@0	2859	// Query expressions for any feature can be given without a value.
michael@0	2860	// However, min/max prefixes are not allowed.
michael@0	2861	if (expr->mRange != nsMediaExpression::eEqual) {
michael@0	2862	REPORT_UNEXPECTED(PEMQNoMinMaxWithoutValue);
michael@0	2863	return false;
michael@0	2864	}
michael@0	2865	expr->mValue.Reset();
michael@0	2866	return true;
michael@0	2867	}
michael@0	2868
michael@0	2869	if (!mToken.IsSymbol(':')) {
michael@0	2870	REPORT_UNEXPECTED_TOKEN(PEMQExpectedFeatureNameEnd);
michael@0	2871	UngetToken();
michael@0	2872	SkipUntil(')');
michael@0	2873	return false;
michael@0	2874	}
michael@0	2875
michael@0	2876	bool rv = false;
michael@0	2877	switch (feature->mValueType) {
michael@0	2878	case nsMediaFeature::eLength:
michael@0	2879	rv = ParseNonNegativeVariant(expr->mValue, VARIANT_LENGTH, nullptr);
michael@0	2880	break;
michael@0	2881	case nsMediaFeature::eInteger:
michael@0	2882	case nsMediaFeature::eBoolInteger:
michael@0	2883	rv = ParseNonNegativeVariant(expr->mValue, VARIANT_INTEGER, nullptr);
michael@0	2884	// Enforce extra restrictions for eBoolInteger
michael@0	2885	if (rv &&
michael@0	2886	feature->mValueType == nsMediaFeature::eBoolInteger &&
michael@0	2887	expr->mValue.GetIntValue() > 1)
michael@0	2888	rv = false;
michael@0	2889	break;
michael@0	2890	case nsMediaFeature::eFloat:
michael@0	2891	rv = ParseNonNegativeVariant(expr->mValue, VARIANT_NUMBER, nullptr);
michael@0	2892	break;
michael@0	2893	case nsMediaFeature::eIntRatio:
michael@0	2894	{
michael@0	2895	// Two integers separated by '/', with optional whitespace on
michael@0	2896	// either side of the '/'.
michael@0	2897	nsRefPtr<nsCSSValue::Array> a = nsCSSValue::Array::Create(2);
michael@0	2898	expr->mValue.SetArrayValue(a, eCSSUnit_Array);
michael@0	2899	// We don't bother with ParseNonNegativeVariant since we have to
michael@0	2900	// check for != 0 as well; no need to worry about the UngetToken
michael@0	2901	// since we're throwing out up to the next ')' anyway.
michael@0	2902	rv = ParseVariant(a->Item(0), VARIANT_INTEGER, nullptr) &&
michael@0	2903	a->Item(0).GetIntValue() > 0 &&
michael@0	2904	ExpectSymbol('/', true) &&
michael@0	2905	ParseVariant(a->Item(1), VARIANT_INTEGER, nullptr) &&
michael@0	2906	a->Item(1).GetIntValue() > 0;
michael@0	2907	}
michael@0	2908	break;
michael@0	2909	case nsMediaFeature::eResolution:
michael@0	2910	rv = GetToken(true);
michael@0	2911	if (!rv)
michael@0	2912	break;
michael@0	2913	rv = mToken.mType == eCSSToken_Dimension && mToken.mNumber > 0.0f;
michael@0	2914	if (!rv) {
michael@0	2915	UngetToken();
michael@0	2916	break;
michael@0	2917	}
michael@0	2918	// No worries about whether unitless zero is allowed, since the
michael@0	2919	// value must be positive (and we checked that above).
michael@0	2920	NS_ASSERTION(!mToken.mIdent.IsEmpty(), "unit lied");
michael@0	2921	if (mToken.mIdent.LowerCaseEqualsLiteral("dpi")) {
michael@0	2922	expr->mValue.SetFloatValue(mToken.mNumber, eCSSUnit_Inch);
michael@0	2923	} else if (mToken.mIdent.LowerCaseEqualsLiteral("dppx")) {
michael@0	2924	expr->mValue.SetFloatValue(mToken.mNumber, eCSSUnit_Pixel);
michael@0	2925	} else if (mToken.mIdent.LowerCaseEqualsLiteral("dpcm")) {
michael@0	2926	expr->mValue.SetFloatValue(mToken.mNumber, eCSSUnit_Centimeter);
michael@0	2927	} else {
michael@0	2928	rv = false;
michael@0	2929	}
michael@0	2930	break;
michael@0	2931	case nsMediaFeature::eEnumerated:
michael@0	2932	rv = ParseVariant(expr->mValue, VARIANT_KEYWORD,
michael@0	2933	feature->mData.mKeywordTable);
michael@0	2934	break;
michael@0	2935	case nsMediaFeature::eIdent:
michael@0	2936	rv = ParseVariant(expr->mValue, VARIANT_IDENTIFIER, nullptr);
michael@0	2937	break;
michael@0	2938	}
michael@0	2939	if (!rv || !ExpectSymbol(')', true)) {
michael@0	2940	REPORT_UNEXPECTED(PEMQExpectedFeatureValue);
michael@0	2941	SkipUntil(')');
michael@0	2942	return false;
michael@0	2943	}
michael@0	2944
michael@0	2945	return true;
michael@0	2946	}
michael@0	2947
michael@0	2948	// Parse a CSS2 import rule: "@import STRING | URL [medium [, medium]]"
michael@0	2949	bool
michael@0	2950	CSSParserImpl::ParseImportRule(RuleAppendFunc aAppendFunc, void* aData)
michael@0	2951	{
michael@0	2952	nsRefPtr<nsMediaList> media = new nsMediaList();
michael@0	2953
michael@0	2954	nsAutoString url;
michael@0	2955	if (!ParseURLOrString(url)) {
michael@0	2956	REPORT_UNEXPECTED_TOKEN(PEImportNotURI);
michael@0	2957	return false;
michael@0	2958	}
michael@0	2959
michael@0	2960	if (!ExpectSymbol(';', true)) {
michael@0	2961	if (!GatherMedia(media, true) ||
michael@0	2962	!ExpectSymbol(';', true)) {
michael@0	2963	REPORT_UNEXPECTED_TOKEN(PEImportUnexpected);
michael@0	2964	// don't advance section, simply ignore invalid @import
michael@0	2965	return false;
michael@0	2966	}
michael@0	2967
michael@0	2968	// Safe to assert this, since we ensured that there is something
michael@0	2969	// other than the ';' coming after the @import's url() token.
michael@0	2970	NS_ASSERTION(media->Length() != 0, "media list must be nonempty");
michael@0	2971	}
michael@0	2972
michael@0	2973	ProcessImport(url, media, aAppendFunc, aData);
michael@0	2974	return true;
michael@0	2975	}
michael@0	2976
michael@0	2977
michael@0	2978	void
michael@0	2979	CSSParserImpl::ProcessImport(const nsString& aURLSpec,
michael@0	2980	nsMediaList* aMedia,
michael@0	2981	RuleAppendFunc aAppendFunc,
michael@0	2982	void* aData)
michael@0	2983	{
michael@0	2984	nsRefPtr<css::ImportRule> rule = new css::ImportRule(aMedia, aURLSpec);
michael@0	2985	(*aAppendFunc)(rule, aData);
michael@0	2986
michael@0	2987	// Diagnose bad URIs even if we don't have a child loader.
michael@0	2988	nsCOMPtr<nsIURI> url;
michael@0	2989	// Charset will be deduced from mBaseURI, which is more or less correct.
michael@0	2990	nsresult rv = NS_NewURI(getter_AddRefs(url), aURLSpec, nullptr, mBaseURI);
michael@0	2991
michael@0	2992	if (NS_FAILED(rv)) {
michael@0	2993	if (rv == NS_ERROR_MALFORMED_URI) {
michael@0	2994	// import url is bad
michael@0	2995	REPORT_UNEXPECTED_P(PEImportBadURI, aURLSpec);
michael@0	2996	OUTPUT_ERROR();
michael@0	2997	}
michael@0	2998	return;
michael@0	2999	}
michael@0	3000
michael@0	3001	if (mChildLoader) {
michael@0	3002	mChildLoader->LoadChildSheet(mSheet, url, aMedia, rule);
michael@0	3003	}
michael@0	3004	}
michael@0	3005
michael@0	3006	// Parse the {} part of an @media or @-moz-document rule.
michael@0	3007	bool
michael@0	3008	CSSParserImpl::ParseGroupRule(css::GroupRule* aRule,
michael@0	3009	RuleAppendFunc aAppendFunc,
michael@0	3010	void* aData)
michael@0	3011	{
michael@0	3012	// XXXbz this could use better error reporting throughout the method
michael@0	3013	if (!ExpectSymbol('{', true)) {
michael@0	3014	return false;
michael@0	3015	}
michael@0	3016
michael@0	3017	// push rule on stack, loop over children
michael@0	3018	PushGroup(aRule);
michael@0	3019	nsCSSSection holdSection = mSection;
michael@0	3020	mSection = eCSSSection_General;
michael@0	3021
michael@0	3022	for (;;) {
michael@0	3023	// Get next non-whitespace token
michael@0	3024	if (! GetToken(true)) {
michael@0	3025	REPORT_UNEXPECTED_EOF(PEGroupRuleEOF2);
michael@0	3026	break;
michael@0	3027	}
michael@0	3028	if (mToken.IsSymbol('}')) { // done!
michael@0	3029	UngetToken();
michael@0	3030	break;
michael@0	3031	}
michael@0	3032	if (eCSSToken_AtKeyword == mToken.mType) {
michael@0	3033	// Parse for nested rules
michael@0	3034	ParseAtRule(aAppendFunc, aData, true);
michael@0	3035	continue;
michael@0	3036	}
michael@0	3037	UngetToken();
michael@0	3038	ParseRuleSet(AppendRuleToSheet, this, true);
michael@0	3039	}
michael@0	3040	PopGroup();
michael@0	3041
michael@0	3042	if (!ExpectSymbol('}', true)) {
michael@0	3043	mSection = holdSection;
michael@0	3044	return false;
michael@0	3045	}
michael@0	3046	(*aAppendFunc)(aRule, aData);
michael@0	3047	return true;
michael@0	3048	}
michael@0	3049
michael@0	3050	// Parse a CSS2 media rule: "@media medium [, medium] { ... }"
michael@0	3051	bool
michael@0	3052	CSSParserImpl::ParseMediaRule(RuleAppendFunc aAppendFunc, void* aData)
michael@0	3053	{
michael@0	3054	nsRefPtr<nsMediaList> media = new nsMediaList();
michael@0	3055
michael@0	3056	if (GatherMedia(media, true)) {
michael@0	3057	// XXXbz this could use better error reporting throughout the method
michael@0	3058	nsRefPtr<css::MediaRule> rule = new css::MediaRule();
michael@0	3059	// Append first, so when we do SetMedia() the rule
michael@0	3060	// knows what its stylesheet is.
michael@0	3061	if (ParseGroupRule(rule, aAppendFunc, aData)) {
michael@0	3062	rule->SetMedia(media);
michael@0	3063	return true;
michael@0	3064	}
michael@0	3065	}
michael@0	3066
michael@0	3067	return false;
michael@0	3068	}
michael@0	3069
michael@0	3070	// Parse a @-moz-document rule. This is like an @media rule, but instead
michael@0	3071	// of a medium it has a nonempty list of items where each item is either
michael@0	3072	// url(), url-prefix(), or domain().
michael@0	3073	bool
michael@0	3074	CSSParserImpl::ParseMozDocumentRule(RuleAppendFunc aAppendFunc, void* aData)
michael@0	3075	{
michael@0	3076	css::DocumentRule::URL *urls = nullptr;
michael@0	3077	css::DocumentRule::URL **next = &urls;
michael@0	3078	do {
michael@0	3079	if (!GetToken(true)) {
michael@0	3080	REPORT_UNEXPECTED_EOF(PEMozDocRuleEOF);
michael@0	3081	delete urls;
michael@0	3082	return false;
michael@0	3083	}
michael@0	3084
michael@0	3085	if (!(eCSSToken_URL == mToken.mType ||
michael@0	3086	(eCSSToken_Function == mToken.mType &&
michael@0	3087	(mToken.mIdent.LowerCaseEqualsLiteral("url-prefix") ||
michael@0	3088	mToken.mIdent.LowerCaseEqualsLiteral("domain") ||
michael@0	3089	mToken.mIdent.LowerCaseEqualsLiteral("regexp"))))) {
michael@0	3090	REPORT_UNEXPECTED_TOKEN(PEMozDocRuleBadFunc2);
michael@0	3091	UngetToken();
michael@0	3092	delete urls;
michael@0	3093	return false;
michael@0	3094	}
michael@0	3095	css::DocumentRule::URL *cur = *next = new css::DocumentRule::URL;
michael@0	3096	next = &cur->next;
michael@0	3097	if (mToken.mType == eCSSToken_URL) {
michael@0	3098	cur->func = css::DocumentRule::eURL;
michael@0	3099	CopyUTF16toUTF8(mToken.mIdent, cur->url);
michael@0	3100	} else if (mToken.mIdent.LowerCaseEqualsLiteral("regexp")) {
michael@0	3101	// regexp() is different from url-prefix() and domain() (but
michael@0	3102	// probably the way they *should* have been* in that it requires a
michael@0	3103	// string argument, and doesn't try to behave like url().
michael@0	3104	cur->func = css::DocumentRule::eRegExp;
michael@0	3105	GetToken(true);
michael@0	3106	// copy before we know it's valid (but before ExpectSymbol changes
michael@0	3107	// mToken.mIdent)
michael@0	3108	CopyUTF16toUTF8(mToken.mIdent, cur->url);
michael@0	3109	if (eCSSToken_String != mToken.mType || !ExpectSymbol(')', true)) {
michael@0	3110	REPORT_UNEXPECTED_TOKEN(PEMozDocRuleNotString);
michael@0	3111	SkipUntil(')');
michael@0	3112	delete urls;
michael@0	3113	return false;
michael@0	3114	}
michael@0	3115	} else {
michael@0	3116	if (mToken.mIdent.LowerCaseEqualsLiteral("url-prefix")) {
michael@0	3117	cur->func = css::DocumentRule::eURLPrefix;
michael@0	3118	} else if (mToken.mIdent.LowerCaseEqualsLiteral("domain")) {
michael@0	3119	cur->func = css::DocumentRule::eDomain;
michael@0	3120	}
michael@0	3121
michael@0	3122	NS_ASSERTION(!mHavePushBack, "mustn't have pushback at this point");
michael@0	3123	if (!mScanner->NextURL(mToken) || mToken.mType != eCSSToken_URL) {
michael@0	3124	REPORT_UNEXPECTED_TOKEN(PEMozDocRuleNotURI);
michael@0	3125	SkipUntil(')');
michael@0	3126	delete urls;
michael@0	3127	return false;
michael@0	3128	}
michael@0	3129
michael@0	3130	// We could try to make the URL (as long as it's not domain())
michael@0	3131	// canonical and absolute with NS_NewURI and GetSpec, but I'm
michael@0	3132	// inclined to think we shouldn't.
michael@0	3133	CopyUTF16toUTF8(mToken.mIdent, cur->url);
michael@0	3134	}
michael@0	3135	} while (ExpectSymbol(',', true));
michael@0	3136
michael@0	3137	nsRefPtr<css::DocumentRule> rule = new css::DocumentRule();
michael@0	3138	rule->SetURLs(urls);
michael@0	3139
michael@0	3140	return ParseGroupRule(rule, aAppendFunc, aData);
michael@0	3141	}
michael@0	3142
michael@0	3143	// Parse a CSS3 namespace rule: "@namespace [prefix] STRING | URL;"
michael@0	3144	bool
michael@0	3145	CSSParserImpl::ParseNameSpaceRule(RuleAppendFunc aAppendFunc, void* aData)
michael@0	3146	{
michael@0	3147	if (!GetToken(true)) {
michael@0	3148	REPORT_UNEXPECTED_EOF(PEAtNSPrefixEOF);
michael@0	3149	return false;
michael@0	3150	}
michael@0	3151
michael@0	3152	nsAutoString prefix;
michael@0	3153	nsAutoString url;
michael@0	3154
michael@0	3155	if (eCSSToken_Ident == mToken.mType) {
michael@0	3156	prefix = mToken.mIdent;
michael@0	3157	// user-specified identifiers are case-sensitive (bug 416106)
michael@0	3158	} else {
michael@0	3159	UngetToken();
michael@0	3160	}
michael@0	3161
michael@0	3162	if (!ParseURLOrString(url) || !ExpectSymbol(';', true)) {
michael@0	3163	if (mHavePushBack) {
michael@0	3164	REPORT_UNEXPECTED_TOKEN(PEAtNSUnexpected);
michael@0	3165	} else {
michael@0	3166	REPORT_UNEXPECTED_EOF(PEAtNSURIEOF);
michael@0	3167	}
michael@0	3168	return false;
michael@0	3169	}
michael@0	3170
michael@0	3171	ProcessNameSpace(prefix, url, aAppendFunc, aData);
michael@0	3172	return true;
michael@0	3173	}
michael@0	3174
michael@0	3175	void
michael@0	3176	CSSParserImpl::ProcessNameSpace(const nsString& aPrefix,
michael@0	3177	const nsString& aURLSpec,
michael@0	3178	RuleAppendFunc aAppendFunc,
michael@0	3179	void* aData)
michael@0	3180	{
michael@0	3181	nsCOMPtr<nsIAtom> prefix;
michael@0	3182
michael@0	3183	if (!aPrefix.IsEmpty()) {
michael@0	3184	prefix = do_GetAtom(aPrefix);
michael@0	3185	if (!prefix) {
michael@0	3186	NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
michael@0	3187	}
michael@0	3188	}
michael@0	3189
michael@0	3190	nsRefPtr<css::NameSpaceRule> rule = new css::NameSpaceRule(prefix, aURLSpec);
michael@0	3191	(*aAppendFunc)(rule, aData);
michael@0	3192
michael@0	3193	// If this was the first namespace rule encountered, it will trigger
michael@0	3194	// creation of a namespace map.
michael@0	3195	if (!mNameSpaceMap) {
michael@0	3196	mNameSpaceMap = mSheet->GetNameSpaceMap();
michael@0	3197	}
michael@0	3198	}
michael@0	3199
michael@0	3200	// font-face-rule: '@font-face' '{' font-description '}'
michael@0	3201	// font-description: font-descriptor+
michael@0	3202	bool
michael@0	3203	CSSParserImpl::ParseFontFaceRule(RuleAppendFunc aAppendFunc, void* aData)
michael@0	3204	{
michael@0	3205	if (!ExpectSymbol('{', true)) {
michael@0	3206	REPORT_UNEXPECTED_TOKEN(PEBadFontBlockStart);
michael@0	3207	return false;
michael@0	3208	}
michael@0	3209
michael@0	3210	nsRefPtr<nsCSSFontFaceRule> rule(new nsCSSFontFaceRule());
michael@0	3211
michael@0	3212	for (;;) {
michael@0	3213	if (!GetToken(true)) {
michael@0	3214	REPORT_UNEXPECTED_EOF(PEFontFaceEOF);
michael@0	3215	break;
michael@0	3216	}
michael@0	3217	if (mToken.IsSymbol('}')) { // done!
michael@0	3218	UngetToken();
michael@0	3219	break;
michael@0	3220	}
michael@0	3221
michael@0	3222	// ignore extra semicolons
michael@0	3223	if (mToken.IsSymbol(';'))
michael@0	3224	continue;
michael@0	3225
michael@0	3226	if (!ParseFontDescriptor(rule)) {
michael@0	3227	REPORT_UNEXPECTED(PEDeclSkipped);
michael@0	3228	OUTPUT_ERROR();
michael@0	3229	if (!SkipDeclaration(true))
michael@0	3230	break;
michael@0	3231	}
michael@0	3232	}
michael@0	3233	if (!ExpectSymbol('}', true)) {
michael@0	3234	REPORT_UNEXPECTED_TOKEN(PEBadFontBlockEnd);
michael@0	3235	return false;
michael@0	3236	}
michael@0	3237	(*aAppendFunc)(rule, aData);
michael@0	3238	return true;
michael@0	3239	}
michael@0	3240
michael@0	3241	// font-descriptor: font-family-desc
michael@0	3242	// | font-style-desc
michael@0	3243	// | font-weight-desc
michael@0	3244	// | font-stretch-desc
michael@0	3245	// | font-src-desc
michael@0	3246	// | unicode-range-desc
michael@0	3247	//
michael@0	3248	// All font-*-desc productions follow the pattern
michael@0	3249	// IDENT ':' value ';'
michael@0	3250	//
michael@0	3251	// On entry to this function, mToken is the IDENT.
michael@0	3252
michael@0	3253	bool
michael@0	3254	CSSParserImpl::ParseFontDescriptor(nsCSSFontFaceRule* aRule)
michael@0	3255	{
michael@0	3256	if (eCSSToken_Ident != mToken.mType) {
michael@0	3257	REPORT_UNEXPECTED_TOKEN(PEFontDescExpected);
michael@0	3258	return false;
michael@0	3259	}
michael@0	3260
michael@0	3261	nsString descName = mToken.mIdent;
michael@0	3262	if (!ExpectSymbol(':', true)) {
michael@0	3263	REPORT_UNEXPECTED_TOKEN(PEParseDeclarationNoColon);
michael@0	3264	OUTPUT_ERROR();
michael@0	3265	return false;
michael@0	3266	}
michael@0	3267
michael@0	3268	nsCSSFontDesc descID = nsCSSProps::LookupFontDesc(descName);
michael@0	3269	nsCSSValue value;
michael@0	3270
michael@0	3271	if (descID == eCSSFontDesc_UNKNOWN) {
michael@0	3272	if (NonMozillaVendorIdentifier(descName)) {
michael@0	3273	// silently skip other vendors' extensions
michael@0	3274	SkipDeclaration(true);
michael@0	3275	return true;
michael@0	3276	} else {
michael@0	3277	REPORT_UNEXPECTED_P(PEUnknownFontDesc, descName);
michael@0	3278	return false;
michael@0	3279	}
michael@0	3280	}
michael@0	3281
michael@0	3282	if (!ParseFontDescriptorValue(descID, value)) {
michael@0	3283	REPORT_UNEXPECTED_P(PEValueParsingError, descName);
michael@0	3284	return false;
michael@0	3285	}
michael@0	3286
michael@0	3287	if (!ExpectEndProperty())
michael@0	3288	return false;
michael@0	3289
michael@0	3290	aRule->SetDesc(descID, value);
michael@0	3291	return true;
michael@0	3292	}
michael@0	3293
michael@0	3294	// @font-feature-values <font-family># {
michael@0	3295	// @<feature-type> {
michael@0	3296	// <feature-ident> : <feature-index>+;
michael@0	3297	// <feature-ident> : <feature-index>+;
michael@0	3298	// ...
michael@0	3299	// }
michael@0	3300	// ...
michael@0	3301	// }
michael@0	3302
michael@0	3303	bool
michael@0	3304	CSSParserImpl::ParseFontFeatureValuesRule(RuleAppendFunc aAppendFunc,
michael@0	3305	void* aData)
michael@0	3306	{
michael@0	3307	nsRefPtr<nsCSSFontFeatureValuesRule>
michael@0	3308	valuesRule(new nsCSSFontFeatureValuesRule());
michael@0	3309
michael@0	3310	// parse family list
michael@0	3311	nsCSSValue familyValue;
michael@0	3312
michael@0	3313	if (!ParseFamily(familyValue) ||
michael@0	3314	familyValue.GetUnit() != eCSSUnit_Families)
michael@0	3315	{
michael@0	3316	REPORT_UNEXPECTED_TOKEN(PEFFVNoFamily);
michael@0	3317	return false;
michael@0	3318	}
michael@0	3319
michael@0	3320	// add family to rule
michael@0	3321	nsAutoString familyList;
michael@0	3322	bool hasGeneric;
michael@0	3323	familyValue.GetStringValue(familyList);
michael@0	3324	valuesRule->SetFamilyList(familyList, hasGeneric);
michael@0	3325
michael@0	3326	// family list has generic ==> parse error
michael@0	3327	if (hasGeneric) {
michael@0	3328	REPORT_UNEXPECTED_TOKEN(PEFFVGenericInFamilyList);
michael@0	3329	return false;
michael@0	3330	}
michael@0	3331
michael@0	3332	// open brace
michael@0	3333	if (!ExpectSymbol('{', true)) {
michael@0	3334	REPORT_UNEXPECTED_TOKEN(PEFFVBlockStart);
michael@0	3335	return false;
michael@0	3336	}
michael@0	3337
michael@0	3338	// list of sets of feature values, each set bound to a specific
michael@0	3339	// feature-type (e.g. swash, annotation)
michael@0	3340	for (;;) {
michael@0	3341	if (!GetToken(true)) {
michael@0	3342	REPORT_UNEXPECTED_EOF(PEFFVUnexpectedEOF);
michael@0	3343	break;
michael@0	3344	}
michael@0	3345	if (mToken.IsSymbol('}')) { // done!
michael@0	3346	UngetToken();
michael@0	3347	break;
michael@0	3348	}
michael@0	3349
michael@0	3350	if (!ParseFontFeatureValueSet(valuesRule)) {
michael@0	3351	if (!SkipAtRule(false)) {
michael@0	3352	break;
michael@0	3353	}
michael@0	3354	}
michael@0	3355	}
michael@0	3356	if (!ExpectSymbol('}', true)) {
michael@0	3357	REPORT_UNEXPECTED_TOKEN(PEFFVUnexpectedBlockEnd);
michael@0	3358	SkipUntil('}');
michael@0	3359	return false;
michael@0	3360	}
michael@0	3361
michael@0	3362	(*aAppendFunc)(valuesRule, aData);
michael@0	3363	return true;
michael@0	3364	}
michael@0	3365
michael@0	3366	#define NUMVALUES_NO_LIMIT 0xFFFF
michael@0	3367
michael@0	3368	// parse a single value set containing name-value pairs for a single feature type
michael@0	3369	// @<feature-type> { [ <feature-ident> : <feature-index>+ ; ]* }
michael@0	3370	// Ex: @swash { flowing: 1; delicate: 2; }
michael@0	3371	bool
michael@0	3372	CSSParserImpl::ParseFontFeatureValueSet(nsCSSFontFeatureValuesRule
michael@0	3373	*aFeatureValuesRule)
michael@0	3374	{
michael@0	3375	// -- @keyword (e.g. swash, styleset)
michael@0	3376	if (eCSSToken_AtKeyword != mToken.mType) {
michael@0	3377	REPORT_UNEXPECTED_TOKEN(PEFontFeatureValuesNoAt);
michael@0	3378	OUTPUT_ERROR();
michael@0	3379	UngetToken();
michael@0	3380	return false;
michael@0	3381	}
michael@0	3382
michael@0	3383	// which font-specific variant of font-variant-alternates
michael@0	3384	int32_t whichVariant;
michael@0	3385	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
michael@0	3386	if (keyword == eCSSKeyword_UNKNOWN ||
michael@0	3387	!nsCSSProps::FindKeyword(keyword,
michael@0	3388	nsCSSProps::kFontVariantAlternatesFuncsKTable,
michael@0	3389	whichVariant))
michael@0	3390	{
michael@0	3391	if (!NonMozillaVendorIdentifier(mToken.mIdent)) {
michael@0	3392	REPORT_UNEXPECTED_TOKEN(PEFFVUnknownFontVariantPropValue);
michael@0	3393	OUTPUT_ERROR();
michael@0	3394	}
michael@0	3395	UngetToken();
michael@0	3396	return false;
michael@0	3397	}
michael@0	3398
michael@0	3399	nsAutoString featureType(mToken.mIdent);
michael@0	3400
michael@0	3401	// open brace
michael@0	3402	if (!ExpectSymbol('{', true)) {
michael@0	3403	REPORT_UNEXPECTED_TOKEN(PEFFVValueSetStart);
michael@0	3404	return false;
michael@0	3405	}
michael@0	3406
michael@0	3407	// styleset and character-variant can be multi-valued, otherwise single value
michael@0	3408	int32_t limitNumValues;
michael@0	3409
michael@0	3410	switch (keyword) {
michael@0	3411	case eCSSKeyword_styleset:
michael@0	3412	limitNumValues = NUMVALUES_NO_LIMIT;
michael@0	3413	break;
michael@0	3414	case eCSSKeyword_character_variant:
michael@0	3415	limitNumValues = 2;
michael@0	3416	break;
michael@0	3417	default:
michael@0	3418	limitNumValues = 1;
michael@0	3419	break;
michael@0	3420	}
michael@0	3421
michael@0	3422	// -- ident integer+ [, ident integer+]
michael@0	3423	nsAutoTArray<gfxFontFeatureValueSet::ValueList, 5> values;
michael@0	3424
michael@0	3425	// list of font-feature-values-declaration's
michael@0	3426	for (;;) {
michael@0	3427	nsAutoString valueId;
michael@0	3428
michael@0	3429	if (!GetToken(true)) {
michael@0	3430	REPORT_UNEXPECTED_EOF(PEFFVUnexpectedEOF);
michael@0	3431	break;
michael@0	3432	}
michael@0	3433
michael@0	3434	// ignore extra semicolons
michael@0	3435	if (mToken.IsSymbol(';')) {
michael@0	3436	continue;
michael@0	3437	}
michael@0	3438
michael@0	3439	// close brace ==> done
michael@0	3440	if (mToken.IsSymbol('}')) {
michael@0	3441	break;
michael@0	3442	}
michael@0	3443
michael@0	3444	// ident
michael@0	3445	if (eCSSToken_Ident != mToken.mType) {
michael@0	3446	REPORT_UNEXPECTED_TOKEN(PEFFVExpectedIdent);
michael@0	3447	if (!SkipDeclaration(true)) {
michael@0	3448	break;
michael@0	3449	}
michael@0	3450	continue;
michael@0	3451	}
michael@0	3452
michael@0	3453	valueId.Assign(mToken.mIdent);
michael@0	3454
michael@0	3455	// colon
michael@0	3456	if (!ExpectSymbol(':', true)) {
michael@0	3457	REPORT_UNEXPECTED_TOKEN(PEParseDeclarationNoColon);
michael@0	3458	OUTPUT_ERROR();
michael@0	3459	if (!SkipDeclaration(true)) {
michael@0	3460	break;
michael@0	3461	}
michael@0	3462	continue;
michael@0	3463	}
michael@0	3464
michael@0	3465	// value list
michael@0	3466	nsAutoTArray<uint32_t,4> featureSelectors;
michael@0	3467
michael@0	3468	nsCSSValue intValue;
michael@0	3469	while (ParseNonNegativeVariant(intValue, VARIANT_INTEGER, nullptr)) {
michael@0	3470	featureSelectors.AppendElement(uint32_t(intValue.GetIntValue()));
michael@0	3471	}
michael@0	3472
michael@0	3473	int32_t numValues = featureSelectors.Length();
michael@0	3474
michael@0	3475	if (numValues == 0) {
michael@0	3476	REPORT_UNEXPECTED_TOKEN(PEFFVExpectedValue);
michael@0	3477	OUTPUT_ERROR();
michael@0	3478	if (!SkipDeclaration(true)) {
michael@0	3479	break;
michael@0	3480	}
michael@0	3481	continue;
michael@0	3482	}
michael@0	3483
michael@0	3484	if (numValues > limitNumValues) {
michael@0	3485	REPORT_UNEXPECTED_P(PEFFVTooManyValues, featureType);
michael@0	3486	OUTPUT_ERROR();
michael@0	3487	if (!SkipDeclaration(true)) {
michael@0	3488	break;
michael@0	3489	}
michael@0	3490	continue;
michael@0	3491	}
michael@0	3492
michael@0	3493	if (!GetToken(true)) {
michael@0	3494	REPORT_UNEXPECTED_EOF(PEFFVUnexpectedEOF);
michael@0	3495	gfxFontFeatureValueSet::ValueList v(valueId, featureSelectors);
michael@0	3496	values.AppendElement(v);
michael@0	3497	break;
michael@0	3498	}
michael@0	3499
michael@0	3500	// ';' or '}' to end definition
michael@0	3501	if (!mToken.IsSymbol(';') && !mToken.IsSymbol('}')) {
michael@0	3502	REPORT_UNEXPECTED_TOKEN(PEFFVValueDefinitionTrailing);
michael@0	3503	OUTPUT_ERROR();
michael@0	3504	if (!SkipDeclaration(true)) {
michael@0	3505	break;
michael@0	3506	}
michael@0	3507	continue;
michael@0	3508	}
michael@0	3509
michael@0	3510	gfxFontFeatureValueSet::ValueList v(valueId, featureSelectors);
michael@0	3511	values.AppendElement(v);
michael@0	3512
michael@0	3513	if (mToken.IsSymbol('}')) {
michael@0	3514	break;
michael@0	3515	}
michael@0	3516	}
michael@0	3517
michael@0	3518	aFeatureValuesRule->AddValueList(whichVariant, values);
michael@0	3519	return true;
michael@0	3520	}
michael@0	3521
michael@0	3522	bool
michael@0	3523	CSSParserImpl::ParseKeyframesRule(RuleAppendFunc aAppendFunc, void* aData)
michael@0	3524	{
michael@0	3525	if (!GetToken(true)) {
michael@0	3526	REPORT_UNEXPECTED_EOF(PEKeyframeNameEOF);
michael@0	3527	return false;
michael@0	3528	}
michael@0	3529
michael@0	3530	if (mToken.mType != eCSSToken_Ident) {
michael@0	3531	REPORT_UNEXPECTED_TOKEN(PEKeyframeBadName);
michael@0	3532	UngetToken();
michael@0	3533	return false;
michael@0	3534	}
michael@0	3535	nsString name(mToken.mIdent);
michael@0	3536
michael@0	3537	if (!ExpectSymbol('{', true)) {
michael@0	3538	REPORT_UNEXPECTED_TOKEN(PEKeyframeBrace);
michael@0	3539	return false;
michael@0	3540	}
michael@0	3541
michael@0	3542	nsRefPtr<nsCSSKeyframesRule> rule = new nsCSSKeyframesRule(name);
michael@0	3543
michael@0	3544	while (!ExpectSymbol('}', true)) {
michael@0	3545	nsRefPtr<nsCSSKeyframeRule> kid = ParseKeyframeRule();
michael@0	3546	if (kid) {
michael@0	3547	rule->AppendStyleRule(kid);
michael@0	3548	} else {
michael@0	3549	OUTPUT_ERROR();
michael@0	3550	SkipRuleSet(true);
michael@0	3551	}
michael@0	3552	}
michael@0	3553
michael@0	3554	(*aAppendFunc)(rule, aData);
michael@0	3555	return true;
michael@0	3556	}
michael@0	3557
michael@0	3558	bool
michael@0	3559	CSSParserImpl::ParsePageRule(RuleAppendFunc aAppendFunc, void* aData)
michael@0	3560	{
michael@0	3561	// TODO: There can be page selectors after @page such as ":first", ":left".
michael@0	3562	uint32_t parseFlags = eParseDeclaration_InBraces |
michael@0	3563	eParseDeclaration_AllowImportant;
michael@0	3564
michael@0	3565	// Forbid viewport units in @page rules. See bug 811391.
michael@0	3566	NS_ABORT_IF_FALSE(mViewportUnitsEnabled,
michael@0	3567	"Viewport units should be enabled outside of @page rules.");
michael@0	3568	mViewportUnitsEnabled = false;
michael@0	3569	nsAutoPtr<css::Declaration> declaration(
michael@0	3570	ParseDeclarationBlock(parseFlags,
michael@0	3571	eCSSContext_Page));
michael@0	3572	mViewportUnitsEnabled = true;
michael@0	3573
michael@0	3574	if (!declaration) {
michael@0	3575	return false;
michael@0	3576	}
michael@0	3577
michael@0	3578	// Takes ownership of declaration.
michael@0	3579	nsRefPtr<nsCSSPageRule> rule = new nsCSSPageRule(declaration);
michael@0	3580
michael@0	3581	(*aAppendFunc)(rule, aData);
michael@0	3582	return true;
michael@0	3583	}
michael@0	3584
michael@0	3585	already_AddRefed<nsCSSKeyframeRule>
michael@0	3586	CSSParserImpl::ParseKeyframeRule()
michael@0	3587	{
michael@0	3588	InfallibleTArray<float> selectorList;
michael@0	3589	if (!ParseKeyframeSelectorList(selectorList)) {
michael@0	3590	REPORT_UNEXPECTED(PEBadSelectorKeyframeRuleIgnored);
michael@0	3591	return nullptr;
michael@0	3592	}
michael@0	3593
michael@0	3594	// Ignore !important in keyframe rules
michael@0	3595	uint32_t parseFlags = eParseDeclaration_InBraces;
michael@0	3596	nsAutoPtr<css::Declaration> declaration(ParseDeclarationBlock(parseFlags));
michael@0	3597	if (!declaration) {
michael@0	3598	return nullptr;
michael@0	3599	}
michael@0	3600
michael@0	3601	// Takes ownership of declaration, and steals contents of selectorList.
michael@0	3602	nsRefPtr<nsCSSKeyframeRule> rule =
michael@0	3603	new nsCSSKeyframeRule(selectorList, declaration);
michael@0	3604
michael@0	3605	return rule.forget();
michael@0	3606	}
michael@0	3607
michael@0	3608	bool
michael@0	3609	CSSParserImpl::ParseKeyframeSelectorList(InfallibleTArray<float>& aSelectorList)
michael@0	3610	{
michael@0	3611	for (;;) {
michael@0	3612	if (!GetToken(true)) {
michael@0	3613	// The first time through the loop, this means we got an empty
michael@0	3614	// list. Otherwise, it means we have a trailing comma.
michael@0	3615	return false;
michael@0	3616	}
michael@0	3617	float value;
michael@0	3618	switch (mToken.mType) {
michael@0	3619	case eCSSToken_Percentage:
michael@0	3620	value = mToken.mNumber;
michael@0	3621	break;
michael@0	3622	case eCSSToken_Ident:
michael@0	3623	if (mToken.mIdent.LowerCaseEqualsLiteral("from")) {
michael@0	3624	value = 0.0f;
michael@0	3625	break;
michael@0	3626	}
michael@0	3627	if (mToken.mIdent.LowerCaseEqualsLiteral("to")) {
michael@0	3628	value = 1.0f;
michael@0	3629	break;
michael@0	3630	}
michael@0	3631	// fall through
michael@0	3632	default:
michael@0	3633	UngetToken();
michael@0	3634	// The first time through the loop, this means we got an empty
michael@0	3635	// list. Otherwise, it means we have a trailing comma.
michael@0	3636	return false;
michael@0	3637	}
michael@0	3638	aSelectorList.AppendElement(value);
michael@0	3639	if (!ExpectSymbol(',', true)) {
michael@0	3640	return true;
michael@0	3641	}
michael@0	3642	}
michael@0	3643	}
michael@0	3644
michael@0	3645	// supports_rule
michael@0	3646	// : "@supports" supports_condition group_rule_body
michael@0	3647	// ;
michael@0	3648	bool
michael@0	3649	CSSParserImpl::ParseSupportsRule(RuleAppendFunc aAppendFunc, void* aProcessData)
michael@0	3650	{
michael@0	3651	bool conditionMet = false;
michael@0	3652	nsString condition;
michael@0	3653
michael@0	3654	mScanner->StartRecording();
michael@0	3655	bool parsed = ParseSupportsCondition(conditionMet);
michael@0	3656
michael@0	3657	if (!parsed) {
michael@0	3658	mScanner->StopRecording();
michael@0	3659	return false;
michael@0	3660	}
michael@0	3661
michael@0	3662	if (!ExpectSymbol('{', true)) {
michael@0	3663	REPORT_UNEXPECTED_TOKEN(PESupportsGroupRuleStart);
michael@0	3664	mScanner->StopRecording();
michael@0	3665	return false;
michael@0	3666	}
michael@0	3667
michael@0	3668	UngetToken();
michael@0	3669	mScanner->StopRecording(condition);
michael@0	3670
michael@0	3671	// Remove the "{" that would follow the condition.
michael@0	3672	if (condition.Length() != 0) {
michael@0	3673	condition.Truncate(condition.Length() - 1);
michael@0	3674	}
michael@0	3675
michael@0	3676	// Remove spaces from the start and end of the recorded supports condition.
michael@0	3677	condition.Trim(" ", true, true, false);
michael@0	3678
michael@0	3679	// Record whether we are in a failing @supports, so that property parse
michael@0	3680	// errors don't get reported.
michael@0	3681	nsAutoFailingSupportsRule failing(this, conditionMet);
michael@0	3682
michael@0	3683	nsRefPtr<css::GroupRule> rule = new CSSSupportsRule(conditionMet, condition);
michael@0	3684	return ParseGroupRule(rule, aAppendFunc, aProcessData);
michael@0	3685	}
michael@0	3686
michael@0	3687	// supports_condition
michael@0	3688	// : supports_condition_in_parens supports_condition_terms
michael@0	3689	// | supports_condition_negation
michael@0	3690	// ;
michael@0	3691	bool
michael@0	3692	CSSParserImpl::ParseSupportsCondition(bool& aConditionMet)
michael@0	3693	{
michael@0	3694	mInSupportsCondition = true;
michael@0	3695
michael@0	3696	if (!GetToken(true)) {
michael@0	3697	REPORT_UNEXPECTED_EOF(PESupportsConditionStartEOF2);
michael@0	3698	return false;
michael@0	3699	}
michael@0	3700
michael@0	3701	UngetToken();
michael@0	3702
michael@0	3703	mScanner->ClearSeenBadToken();
michael@0	3704
michael@0	3705	if (mToken.IsSymbol('(') ||
michael@0	3706	mToken.mType == eCSSToken_Function ||
michael@0	3707	mToken.mType == eCSSToken_URL ||
michael@0	3708	mToken.mType == eCSSToken_Bad_URL) {
michael@0	3709	bool result = ParseSupportsConditionInParens(aConditionMet) &&
michael@0	3710	ParseSupportsConditionTerms(aConditionMet) &&
michael@0	3711	!mScanner->SeenBadToken();
michael@0	3712	mInSupportsCondition = false;
michael@0	3713	return result;
michael@0	3714	}
michael@0	3715
michael@0	3716	if (mToken.mType == eCSSToken_Ident &&
michael@0	3717	mToken.mIdent.LowerCaseEqualsLiteral("not")) {
michael@0	3718	bool result = ParseSupportsConditionNegation(aConditionMet) &&
michael@0	3719	!mScanner->SeenBadToken();
michael@0	3720	mInSupportsCondition = false;
michael@0	3721	return result;
michael@0	3722	}
michael@0	3723
michael@0	3724	REPORT_UNEXPECTED_TOKEN(PESupportsConditionExpectedStart);
michael@0	3725	mInSupportsCondition = false;
michael@0	3726	return false;
michael@0	3727	}
michael@0	3728
michael@0	3729	// supports_condition_negation
michael@0	3730	// : 'not' S+ supports_condition_in_parens
michael@0	3731	// ;
michael@0	3732	bool
michael@0	3733	CSSParserImpl::ParseSupportsConditionNegation(bool& aConditionMet)
michael@0	3734	{
michael@0	3735	if (!GetToken(true)) {
michael@0	3736	REPORT_UNEXPECTED_EOF(PESupportsConditionNotEOF);
michael@0	3737	return false;
michael@0	3738	}
michael@0	3739
michael@0	3740	if (mToken.mType != eCSSToken_Ident ||
michael@0	3741	!mToken.mIdent.LowerCaseEqualsLiteral("not")) {
michael@0	3742	REPORT_UNEXPECTED_TOKEN(PESupportsConditionExpectedNot);
michael@0	3743	return false;
michael@0	3744	}
michael@0	3745
michael@0	3746	if (!RequireWhitespace()) {
michael@0	3747	REPORT_UNEXPECTED(PESupportsWhitespaceRequired);
michael@0	3748	return false;
michael@0	3749	}
michael@0	3750
michael@0	3751	if (ParseSupportsConditionInParens(aConditionMet)) {
michael@0	3752	aConditionMet = !aConditionMet;
michael@0	3753	return true;
michael@0	3754	}
michael@0	3755
michael@0	3756	return false;
michael@0	3757	}
michael@0	3758
michael@0	3759	// supports_condition_in_parens
michael@0	3760	// : '(' S* supports_condition_in_parens_inside_parens ')' S*
michael@0	3761	// | general_enclosed
michael@0	3762	// ;
michael@0	3763	bool
michael@0	3764	CSSParserImpl::ParseSupportsConditionInParens(bool& aConditionMet)
michael@0	3765	{
michael@0	3766	if (!GetToken(true)) {
michael@0	3767	REPORT_UNEXPECTED_EOF(PESupportsConditionInParensStartEOF);
michael@0	3768	return false;
michael@0	3769	}
michael@0	3770
michael@0	3771	if (mToken.mType == eCSSToken_URL) {
michael@0	3772	aConditionMet = false;
michael@0	3773	return true;
michael@0	3774	}
michael@0	3775
michael@0	3776	if (mToken.mType == eCSSToken_Function ||
michael@0	3777	mToken.mType == eCSSToken_Bad_URL) {
michael@0	3778	if (!SkipUntil(')')) {
michael@0	3779	REPORT_UNEXPECTED_EOF(PESupportsConditionInParensEOF);
michael@0	3780	return false;
michael@0	3781	}
michael@0	3782	aConditionMet = false;
michael@0	3783	return true;
michael@0	3784	}
michael@0	3785
michael@0	3786	if (!mToken.IsSymbol('(')) {
michael@0	3787	REPORT_UNEXPECTED_TOKEN(PESupportsConditionExpectedOpenParenOrFunction);
michael@0	3788	UngetToken();
michael@0	3789	return false;
michael@0	3790	}
michael@0	3791
michael@0	3792	if (!ParseSupportsConditionInParensInsideParens(aConditionMet)) {
michael@0	3793	if (!SkipUntil(')')) {
michael@0	3794	REPORT_UNEXPECTED_EOF(PESupportsConditionInParensEOF);
michael@0	3795	return false;
michael@0	3796	}
michael@0	3797	aConditionMet = false;
michael@0	3798	return true;
michael@0	3799	}
michael@0	3800
michael@0	3801	if (!(ExpectSymbol(')', true))) {
michael@0	3802	SkipUntil(')');
michael@0	3803	aConditionMet = false;
michael@0	3804	return true;
michael@0	3805	}
michael@0	3806
michael@0	3807	return true;
michael@0	3808	}
michael@0	3809
michael@0	3810	// supports_condition_in_parens_inside_parens
michael@0	3811	// : core_declaration
michael@0	3812	// | supports_condition_negation
michael@0	3813	// | supports_condition_in_parens supports_condition_terms
michael@0	3814	// ;
michael@0	3815	bool
michael@0	3816	CSSParserImpl::ParseSupportsConditionInParensInsideParens(bool& aConditionMet)
michael@0	3817	{
michael@0	3818	if (!GetToken(true)) {
michael@0	3819	return false;
michael@0	3820	}
michael@0	3821
michael@0	3822	if (mToken.mType == eCSSToken_Ident) {
michael@0	3823	if (!mToken.mIdent.LowerCaseEqualsLiteral("not")) {
michael@0	3824	nsAutoString propertyName = mToken.mIdent;
michael@0	3825	if (!ExpectSymbol(':', true)) {
michael@0	3826	return false;
michael@0	3827	}
michael@0	3828
michael@0	3829	nsCSSProperty propID = LookupEnabledProperty(propertyName);
michael@0	3830	if (propID == eCSSProperty_UNKNOWN) {
michael@0	3831	if (ExpectSymbol(')', true)) {
michael@0	3832	UngetToken();
michael@0	3833	return false;
michael@0	3834	}
michael@0	3835	aConditionMet = false;
michael@0	3836	SkipUntil(')');
michael@0	3837	UngetToken();
michael@0	3838	} else if (propID == eCSSPropertyExtra_variable) {
michael@0	3839	if (ExpectSymbol(')', false)) {
michael@0	3840	UngetToken();
michael@0	3841	return false;
michael@0	3842	}
michael@0	3843	CSSVariableDeclarations::Type variableType;
michael@0	3844	nsString variableValue;
michael@0	3845	aConditionMet =
michael@0	3846	ParseVariableDeclaration(&variableType, variableValue) &&
michael@0	3847	ParsePriority() != ePriority_Error;
michael@0	3848	if (!aConditionMet) {
michael@0	3849	SkipUntil(')');
michael@0	3850	UngetToken();
michael@0	3851	}
michael@0	3852	} else {
michael@0	3853	if (ExpectSymbol(')', true)) {
michael@0	3854	UngetToken();
michael@0	3855	return false;
michael@0	3856	}
michael@0	3857	aConditionMet = ParseProperty(propID) &&
michael@0	3858	ParsePriority() != ePriority_Error;
michael@0	3859	if (!aConditionMet) {
michael@0	3860	SkipUntil(')');
michael@0	3861	UngetToken();
michael@0	3862	}
michael@0	3863	mTempData.ClearProperty(propID);
michael@0	3864	mTempData.AssertInitialState();
michael@0	3865	}
michael@0	3866	return true;
michael@0	3867	}
michael@0	3868
michael@0	3869	UngetToken();
michael@0	3870	return ParseSupportsConditionNegation(aConditionMet);
michael@0	3871	}
michael@0	3872
michael@0	3873	UngetToken();
michael@0	3874	return ParseSupportsConditionInParens(aConditionMet) &&
michael@0	3875	ParseSupportsConditionTerms(aConditionMet);
michael@0	3876	}
michael@0	3877
michael@0	3878	// supports_condition_terms
michael@0	3879	// : S+ 'and' supports_condition_terms_after_operator('and')
michael@0	3880	// | S+ 'or' supports_condition_terms_after_operator('or')
michael@0	3881	// |
michael@0	3882	// ;
michael@0	3883	bool
michael@0	3884	CSSParserImpl::ParseSupportsConditionTerms(bool& aConditionMet)
michael@0	3885	{
michael@0	3886	if (!RequireWhitespace() || !GetToken(false)) {
michael@0	3887	return true;
michael@0	3888	}
michael@0	3889
michael@0	3890	if (mToken.mType != eCSSToken_Ident) {
michael@0	3891	UngetToken();
michael@0	3892	return true;
michael@0	3893	}
michael@0	3894
michael@0	3895	if (mToken.mIdent.LowerCaseEqualsLiteral("and")) {
michael@0	3896	return ParseSupportsConditionTermsAfterOperator(aConditionMet, eAnd);
michael@0	3897	}
michael@0	3898
michael@0	3899	if (mToken.mIdent.LowerCaseEqualsLiteral("or")) {
michael@0	3900	return ParseSupportsConditionTermsAfterOperator(aConditionMet, eOr);
michael@0	3901	}
michael@0	3902
michael@0	3903	UngetToken();
michael@0	3904	return true;
michael@0	3905	}
michael@0	3906
michael@0	3907	// supports_condition_terms_after_operator(operator)
michael@0	3908	// : S+ supports_condition_in_parens ( <operator> supports_condition_in_parens )*
michael@0	3909	// ;
michael@0	3910	bool
michael@0	3911	CSSParserImpl::ParseSupportsConditionTermsAfterOperator(
michael@0	3912	bool& aConditionMet,
michael@0	3913	CSSParserImpl::SupportsConditionTermOperator aOperator)
michael@0	3914	{
michael@0	3915	if (!RequireWhitespace()) {
michael@0	3916	REPORT_UNEXPECTED(PESupportsWhitespaceRequired);
michael@0	3917	return false;
michael@0	3918	}
michael@0	3919
michael@0	3920	const char* token = aOperator == eAnd ? "and" : "or";
michael@0	3921	for (;;) {
michael@0	3922	bool termConditionMet = false;
michael@0	3923	if (!ParseSupportsConditionInParens(termConditionMet)) {
michael@0	3924	return false;
michael@0	3925	}
michael@0	3926	aConditionMet = aOperator == eAnd ? aConditionMet && termConditionMet :
michael@0	3927	aConditionMet || termConditionMet;
michael@0	3928
michael@0	3929	if (!GetToken(true)) {
michael@0	3930	return true;
michael@0	3931	}
michael@0	3932
michael@0	3933	if (mToken.mType != eCSSToken_Ident ||
michael@0	3934	!mToken.mIdent.LowerCaseEqualsASCII(token)) {
michael@0	3935	UngetToken();
michael@0	3936	return true;
michael@0	3937	}
michael@0	3938	}
michael@0	3939	}
michael@0	3940
michael@0	3941	bool
michael@0	3942	CSSParserImpl::SkipUntil(char16_t aStopSymbol)
michael@0	3943	{
michael@0	3944	nsCSSToken* tk = &mToken;
michael@0	3945	nsAutoTArray<char16_t, 16> stack;
michael@0	3946	stack.AppendElement(aStopSymbol);
michael@0	3947	for (;;) {
michael@0	3948	if (!GetToken(true)) {
michael@0	3949	return false;
michael@0	3950	}
michael@0	3951	if (eCSSToken_Symbol == tk->mType) {
michael@0	3952	char16_t symbol = tk->mSymbol;
michael@0	3953	uint32_t stackTopIndex = stack.Length() - 1;
michael@0	3954	if (symbol == stack.ElementAt(stackTopIndex)) {
michael@0	3955	stack.RemoveElementAt(stackTopIndex);
michael@0	3956	if (stackTopIndex == 0) {
michael@0	3957	return true;
michael@0	3958	}
michael@0	3959
michael@0	3960	// Just handle out-of-memory by parsing incorrectly. It's
michael@0	3961	// highly unlikely we're dealing with a legitimate style sheet
michael@0	3962	// anyway.
michael@0	3963	} else if ('{' == symbol) {
michael@0	3964	stack.AppendElement('}');
michael@0	3965	} else if ('[' == symbol) {
michael@0	3966	stack.AppendElement(']');
michael@0	3967	} else if ('(' == symbol) {
michael@0	3968	stack.AppendElement(')');
michael@0	3969	}
michael@0	3970	} else if (eCSSToken_Function == tk->mType ||
michael@0	3971	eCSSToken_Bad_URL == tk->mType) {
michael@0	3972	stack.AppendElement(')');
michael@0	3973	}
michael@0	3974	}
michael@0	3975	}
michael@0	3976
michael@0	3977	bool
michael@0	3978	CSSParserImpl::SkipBalancedContentUntil(char16_t aStopSymbol)
michael@0	3979	{
michael@0	3980	nsCSSToken* tk = &mToken;
michael@0	3981	nsAutoTArray<char16_t, 16> stack;
michael@0	3982	stack.AppendElement(aStopSymbol);
michael@0	3983	for (;;) {
michael@0	3984	if (!GetToken(true)) {
michael@0	3985	return true;
michael@0	3986	}
michael@0	3987	if (eCSSToken_Symbol == tk->mType) {
michael@0	3988	char16_t symbol = tk->mSymbol;
michael@0	3989	uint32_t stackTopIndex = stack.Length() - 1;
michael@0	3990	if (symbol == stack.ElementAt(stackTopIndex)) {
michael@0	3991	stack.RemoveElementAt(stackTopIndex);
michael@0	3992	if (stackTopIndex == 0) {
michael@0	3993	return true;
michael@0	3994	}
michael@0	3995
michael@0	3996	// Just handle out-of-memory by parsing incorrectly. It's
michael@0	3997	// highly unlikely we're dealing with a legitimate style sheet
michael@0	3998	// anyway.
michael@0	3999	} else if ('{' == symbol) {
michael@0	4000	stack.AppendElement('}');
michael@0	4001	} else if ('[' == symbol) {
michael@0	4002	stack.AppendElement(']');
michael@0	4003	} else if ('(' == symbol) {
michael@0	4004	stack.AppendElement(')');
michael@0	4005	} else if (')' == symbol ||
michael@0	4006	']' == symbol ||
michael@0	4007	'}' == symbol) {
michael@0	4008	UngetToken();
michael@0	4009	return false;
michael@0	4010	}
michael@0	4011	} else if (eCSSToken_Function == tk->mType ||
michael@0	4012	eCSSToken_Bad_URL == tk->mType) {
michael@0	4013	stack.AppendElement(')');
michael@0	4014	}
michael@0	4015	}
michael@0	4016	}
michael@0	4017
michael@0	4018	void
michael@0	4019	CSSParserImpl::SkipUntilOneOf(const char16_t* aStopSymbolChars)
michael@0	4020	{
michael@0	4021	nsCSSToken* tk = &mToken;
michael@0	4022	nsDependentString stopSymbolChars(aStopSymbolChars);
michael@0	4023	for (;;) {
michael@0	4024	if (!GetToken(true)) {
michael@0	4025	break;
michael@0	4026	}
michael@0	4027	if (eCSSToken_Symbol == tk->mType) {
michael@0	4028	char16_t symbol = tk->mSymbol;
michael@0	4029	if (stopSymbolChars.FindChar(symbol) != -1) {
michael@0	4030	break;
michael@0	4031	} else if ('{' == symbol) {
michael@0	4032	SkipUntil('}');
michael@0	4033	} else if ('[' == symbol) {
michael@0	4034	SkipUntil(']');
michael@0	4035	} else if ('(' == symbol) {
michael@0	4036	SkipUntil(')');
michael@0	4037	}
michael@0	4038	} else if (eCSSToken_Function == tk->mType ||
michael@0	4039	eCSSToken_Bad_URL == tk->mType) {
michael@0	4040	SkipUntil(')');
michael@0	4041	}
michael@0	4042	}
michael@0	4043	}
michael@0	4044
michael@0	4045	void
michael@0	4046	CSSParserImpl::SkipUntilAllOf(const StopSymbolCharStack& aStopSymbolChars)
michael@0	4047	{
michael@0	4048	uint32_t i = aStopSymbolChars.Length();
michael@0	4049	while (i--) {
michael@0	4050	SkipUntil(aStopSymbolChars[i]);
michael@0	4051	}
michael@0	4052	}
michael@0	4053
michael@0	4054	bool
michael@0	4055	CSSParserImpl::SkipDeclaration(bool aCheckForBraces)
michael@0	4056	{
michael@0	4057	nsCSSToken* tk = &mToken;
michael@0	4058	for (;;) {
michael@0	4059	if (!GetToken(true)) {
michael@0	4060	if (aCheckForBraces) {
michael@0	4061	REPORT_UNEXPECTED_EOF(PESkipDeclBraceEOF);
michael@0	4062	}
michael@0	4063	return false;
michael@0	4064	}
michael@0	4065	if (eCSSToken_Symbol == tk->mType) {
michael@0	4066	char16_t symbol = tk->mSymbol;
michael@0	4067	if (';' == symbol) {
michael@0	4068	break;
michael@0	4069	}
michael@0	4070	if (aCheckForBraces) {
michael@0	4071	if ('}' == symbol) {
michael@0	4072	UngetToken();
michael@0	4073	break;
michael@0	4074	}
michael@0	4075	}
michael@0	4076	if ('{' == symbol) {
michael@0	4077	SkipUntil('}');
michael@0	4078	} else if ('(' == symbol) {
michael@0	4079	SkipUntil(')');
michael@0	4080	} else if ('[' == symbol) {
michael@0	4081	SkipUntil(']');
michael@0	4082	}
michael@0	4083	} else if (eCSSToken_Function == tk->mType ||
michael@0	4084	eCSSToken_Bad_URL == tk->mType) {
michael@0	4085	SkipUntil(')');
michael@0	4086	}
michael@0	4087	}
michael@0	4088	return true;
michael@0	4089	}
michael@0	4090
michael@0	4091	void
michael@0	4092	CSSParserImpl::SkipRuleSet(bool aInsideBraces)
michael@0	4093	{
michael@0	4094	nsCSSToken* tk = &mToken;
michael@0	4095	for (;;) {
michael@0	4096	if (!GetToken(true)) {
michael@0	4097	REPORT_UNEXPECTED_EOF(PESkipRSBraceEOF);
michael@0	4098	break;
michael@0	4099	}
michael@0	4100	if (eCSSToken_Symbol == tk->mType) {
michael@0	4101	char16_t symbol = tk->mSymbol;
michael@0	4102	if ('}' == symbol && aInsideBraces) {
michael@0	4103	// leave block closer for higher-level grammar to consume
michael@0	4104	UngetToken();
michael@0	4105	break;
michael@0	4106	} else if ('{' == symbol) {
michael@0	4107	SkipUntil('}');
michael@0	4108	break;
michael@0	4109	} else if ('(' == symbol) {
michael@0	4110	SkipUntil(')');
michael@0	4111	} else if ('[' == symbol) {
michael@0	4112	SkipUntil(']');
michael@0	4113	}
michael@0	4114	} else if (eCSSToken_Function == tk->mType ||
michael@0	4115	eCSSToken_Bad_URL == tk->mType) {
michael@0	4116	SkipUntil(')');
michael@0	4117	}
michael@0	4118	}
michael@0	4119	}
michael@0	4120
michael@0	4121	void
michael@0	4122	CSSParserImpl::PushGroup(css::GroupRule* aRule)
michael@0	4123	{
michael@0	4124	mGroupStack.AppendElement(aRule);
michael@0	4125	}
michael@0	4126
michael@0	4127	void
michael@0	4128	CSSParserImpl::PopGroup()
michael@0	4129	{
michael@0	4130	uint32_t count = mGroupStack.Length();
michael@0	4131	if (0 < count) {
michael@0	4132	mGroupStack.RemoveElementAt(count - 1);
michael@0	4133	}
michael@0	4134	}
michael@0	4135
michael@0	4136	void
michael@0	4137	CSSParserImpl::AppendRule(css::Rule* aRule)
michael@0	4138	{
michael@0	4139	uint32_t count = mGroupStack.Length();
michael@0	4140	if (0 < count) {
michael@0	4141	mGroupStack[count - 1]->AppendStyleRule(aRule);
michael@0	4142	}
michael@0	4143	else {
michael@0	4144	mSheet->AppendStyleRule(aRule);
michael@0	4145	}
michael@0	4146	}
michael@0	4147
michael@0	4148	bool
michael@0	4149	CSSParserImpl::ParseRuleSet(RuleAppendFunc aAppendFunc, void* aData,
michael@0	4150	bool aInsideBraces)
michael@0	4151	{
michael@0	4152	// First get the list of selectors for the rule
michael@0	4153	nsCSSSelectorList* slist = nullptr;
michael@0	4154	uint32_t linenum, colnum;
michael@0	4155	if (!GetNextTokenLocation(true, &linenum, &colnum) ||
michael@0	4156	!ParseSelectorList(slist, char16_t('{'))) {
michael@0	4157	REPORT_UNEXPECTED(PEBadSelectorRSIgnored);
michael@0	4158	OUTPUT_ERROR();
michael@0	4159	SkipRuleSet(aInsideBraces);
michael@0	4160	return false;
michael@0	4161	}
michael@0	4162	NS_ASSERTION(nullptr != slist, "null selector list");
michael@0	4163	CLEAR_ERROR();
michael@0	4164
michael@0	4165	// Next parse the declaration block
michael@0	4166	uint32_t parseFlags = eParseDeclaration_InBraces |
michael@0	4167	eParseDeclaration_AllowImportant;
michael@0	4168	css::Declaration* declaration = ParseDeclarationBlock(parseFlags);
michael@0	4169	if (nullptr == declaration) {
michael@0	4170	delete slist;
michael@0	4171	return false;
michael@0	4172	}
michael@0	4173
michael@0	4174	#if 0
michael@0	4175	slist->Dump();
michael@0	4176	fputs("{\n", stdout);
michael@0	4177	declaration->List();
michael@0	4178	fputs("}\n", stdout);
michael@0	4179	#endif
michael@0	4180
michael@0	4181	// Translate the selector list and declaration block into style data
michael@0	4182
michael@0	4183	nsRefPtr<css::StyleRule> rule = new css::StyleRule(slist, declaration);
michael@0	4184	rule->SetLineNumberAndColumnNumber(linenum, colnum);
michael@0	4185	(*aAppendFunc)(rule, aData);
michael@0	4186
michael@0	4187	return true;
michael@0	4188	}
michael@0	4189
michael@0	4190	bool
michael@0	4191	CSSParserImpl::ParseSelectorList(nsCSSSelectorList*& aListHead,
michael@0	4192	char16_t aStopChar)
michael@0	4193	{
michael@0	4194	nsCSSSelectorList* list = nullptr;
michael@0	4195	if (! ParseSelectorGroup(list)) {
michael@0	4196	// must have at least one selector group
michael@0	4197	aListHead = nullptr;
michael@0	4198	return false;
michael@0	4199	}
michael@0	4200	NS_ASSERTION(nullptr != list, "no selector list");
michael@0	4201	aListHead = list;
michael@0	4202
michael@0	4203	// After that there must either be a "," or a "{" (the latter if
michael@0	4204	// StopChar is nonzero)
michael@0	4205	nsCSSToken* tk = &mToken;
michael@0	4206	for (;;) {
michael@0	4207	if (! GetToken(true)) {
michael@0	4208	if (aStopChar == char16_t(0)) {
michael@0	4209	return true;
michael@0	4210	}
michael@0	4211
michael@0	4212	REPORT_UNEXPECTED_EOF(PESelectorListExtraEOF);
michael@0	4213	break;
michael@0	4214	}
michael@0	4215
michael@0	4216	if (eCSSToken_Symbol == tk->mType) {
michael@0	4217	if (',' == tk->mSymbol) {
michael@0	4218	nsCSSSelectorList* newList = nullptr;
michael@0	4219	// Another selector group must follow
michael@0	4220	if (! ParseSelectorGroup(newList)) {
michael@0	4221	break;
michael@0	4222	}
michael@0	4223	// add new list to the end of the selector list
michael@0	4224	list->mNext = newList;
michael@0	4225	list = newList;
michael@0	4226	continue;
michael@0	4227	} else if (aStopChar == tk->mSymbol && aStopChar != char16_t(0)) {
michael@0	4228	UngetToken();
michael@0	4229	return true;
michael@0	4230	}
michael@0	4231	}
michael@0	4232	REPORT_UNEXPECTED_TOKEN(PESelectorListExtra);
michael@0	4233	UngetToken();
michael@0	4234	break;
michael@0	4235	}
michael@0	4236
michael@0	4237	delete aListHead;
michael@0	4238	aListHead = nullptr;
michael@0	4239	return false;
michael@0	4240	}
michael@0	4241
michael@0	4242	static bool IsUniversalSelector(const nsCSSSelector& aSelector)
michael@0	4243	{
michael@0	4244	return bool((aSelector.mNameSpace == kNameSpaceID_Unknown) &&
michael@0	4245	(aSelector.mLowercaseTag == nullptr) &&
michael@0	4246	(aSelector.mIDList == nullptr) &&
michael@0	4247	(aSelector.mClassList == nullptr) &&
michael@0	4248	(aSelector.mAttrList == nullptr) &&
michael@0	4249	(aSelector.mNegations == nullptr) &&
michael@0	4250	(aSelector.mPseudoClassList == nullptr));
michael@0	4251	}
michael@0	4252
michael@0	4253	bool
michael@0	4254	CSSParserImpl::ParseSelectorGroup(nsCSSSelectorList*& aList)
michael@0	4255	{
michael@0	4256	char16_t combinator = 0;
michael@0	4257	nsAutoPtr<nsCSSSelectorList> list(new nsCSSSelectorList());
michael@0	4258
michael@0	4259	for (;;) {
michael@0	4260	if (!ParseSelector(list, combinator)) {
michael@0	4261	return false;
michael@0	4262	}
michael@0	4263
michael@0	4264	// Look for a combinator.
michael@0	4265	if (!GetToken(false)) {
michael@0	4266	break; // EOF ok here
michael@0	4267	}
michael@0	4268
michael@0	4269	combinator = char16_t(0);
michael@0	4270	if (mToken.mType == eCSSToken_Whitespace) {
michael@0	4271	if (!GetToken(true)) {
michael@0	4272	break; // EOF ok here
michael@0	4273	}
michael@0	4274	combinator = char16_t(' ');
michael@0	4275	}
michael@0	4276
michael@0	4277	if (mToken.mType != eCSSToken_Symbol) {
michael@0	4278	UngetToken(); // not a combinator
michael@0	4279	} else {
michael@0	4280	char16_t symbol = mToken.mSymbol;
michael@0	4281	if (symbol == '+' || symbol == '>' || symbol == '~') {
michael@0	4282	combinator = mToken.mSymbol;
michael@0	4283	} else {
michael@0	4284	UngetToken(); // not a combinator
michael@0	4285	if (symbol == ',' || symbol == '{' || symbol == ')') {
michael@0	4286	break; // end of selector group
michael@0	4287	}
michael@0	4288	}
michael@0	4289	}
michael@0	4290
michael@0	4291	if (!combinator) {
michael@0	4292	REPORT_UNEXPECTED_TOKEN(PESelectorListExtra);
michael@0	4293	return false;
michael@0	4294	}
michael@0	4295	}
michael@0	4296
michael@0	4297	aList = list.forget();
michael@0	4298	return true;
michael@0	4299	}
michael@0	4300
michael@0	4301	#define SEL_MASK_NSPACE 0x01
michael@0	4302	#define SEL_MASK_ELEM 0x02
michael@0	4303	#define SEL_MASK_ID 0x04
michael@0	4304	#define SEL_MASK_CLASS 0x08
michael@0	4305	#define SEL_MASK_ATTRIB 0x10
michael@0	4306	#define SEL_MASK_PCLASS 0x20
michael@0	4307	#define SEL_MASK_PELEM 0x40
michael@0	4308
michael@0	4309	//
michael@0	4310	// Parses an ID selector #name
michael@0	4311	//
michael@0	4312	CSSParserImpl::nsSelectorParsingStatus
michael@0	4313	CSSParserImpl::ParseIDSelector(int32_t& aDataMask,
michael@0	4314	nsCSSSelector& aSelector)
michael@0	4315	{
michael@0	4316	NS_ASSERTION(!mToken.mIdent.IsEmpty(),
michael@0	4317	"Empty mIdent in eCSSToken_ID token?");
michael@0	4318	aDataMask |= SEL_MASK_ID;
michael@0	4319	aSelector.AddID(mToken.mIdent);
michael@0	4320	return eSelectorParsingStatus_Continue;
michael@0	4321	}
michael@0	4322
michael@0	4323	//
michael@0	4324	// Parses a class selector .name
michael@0	4325	//
michael@0	4326	CSSParserImpl::nsSelectorParsingStatus
michael@0	4327	CSSParserImpl::ParseClassSelector(int32_t& aDataMask,
michael@0	4328	nsCSSSelector& aSelector)
michael@0	4329	{
michael@0	4330	if (! GetToken(false)) { // get ident
michael@0	4331	REPORT_UNEXPECTED_EOF(PEClassSelEOF);
michael@0	4332	return eSelectorParsingStatus_Error;
michael@0	4333	}
michael@0	4334	if (eCSSToken_Ident != mToken.mType) { // malformed selector
michael@0	4335	REPORT_UNEXPECTED_TOKEN(PEClassSelNotIdent);
michael@0	4336	UngetToken();
michael@0	4337	return eSelectorParsingStatus_Error;
michael@0	4338	}
michael@0	4339	aDataMask |= SEL_MASK_CLASS;
michael@0	4340
michael@0	4341	aSelector.AddClass(mToken.mIdent);
michael@0	4342
michael@0	4343	return eSelectorParsingStatus_Continue;
michael@0	4344	}
michael@0	4345
michael@0	4346	//
michael@0	4347	// Parse a type element selector or a universal selector
michael@0	4348	// namespace|type or namespace|* or *|* or *
michael@0	4349	//
michael@0	4350	CSSParserImpl::nsSelectorParsingStatus
michael@0	4351	CSSParserImpl::ParseTypeOrUniversalSelector(int32_t& aDataMask,
michael@0	4352	nsCSSSelector& aSelector,
michael@0	4353	bool aIsNegated)
michael@0	4354	{
michael@0	4355	nsAutoString buffer;
michael@0	4356	if (mToken.IsSymbol('*')) { // universal element selector, or universal namespace
michael@0	4357	if (ExpectSymbol('|', false)) { // was namespace
michael@0	4358	aDataMask |= SEL_MASK_NSPACE;
michael@0	4359	aSelector.SetNameSpace(kNameSpaceID_Unknown); // namespace wildcard
michael@0	4360
michael@0	4361	if (! GetToken(false)) {
michael@0	4362	REPORT_UNEXPECTED_EOF(PETypeSelEOF);
michael@0	4363	return eSelectorParsingStatus_Error;
michael@0	4364	}
michael@0	4365	if (eCSSToken_Ident == mToken.mType) { // element name
michael@0	4366	aDataMask |= SEL_MASK_ELEM;
michael@0	4367
michael@0	4368	aSelector.SetTag(mToken.mIdent);
michael@0	4369	}
michael@0	4370	else if (mToken.IsSymbol('*')) { // universal selector
michael@0	4371	aDataMask |= SEL_MASK_ELEM;
michael@0	4372	// don't set tag
michael@0	4373	}
michael@0	4374	else {
michael@0	4375	REPORT_UNEXPECTED_TOKEN(PETypeSelNotType);
michael@0	4376	UngetToken();
michael@0	4377	return eSelectorParsingStatus_Error;
michael@0	4378	}
michael@0	4379	}
michael@0	4380	else { // was universal element selector
michael@0	4381	SetDefaultNamespaceOnSelector(aSelector);
michael@0	4382	aDataMask |= SEL_MASK_ELEM;
michael@0	4383	// don't set any tag in the selector
michael@0	4384	}
michael@0	4385	if (! GetToken(false)) { // premature eof is ok (here!)
michael@0	4386	return eSelectorParsingStatus_Done;
michael@0	4387	}
michael@0	4388	}
michael@0	4389	else if (eCSSToken_Ident == mToken.mType) { // element name or namespace name
michael@0	4390	buffer = mToken.mIdent; // hang on to ident
michael@0	4391
michael@0	4392	if (ExpectSymbol('|', false)) { // was namespace
michael@0	4393	aDataMask |= SEL_MASK_NSPACE;
michael@0	4394	int32_t nameSpaceID = GetNamespaceIdForPrefix(buffer);
michael@0	4395	if (nameSpaceID == kNameSpaceID_Unknown) {
michael@0	4396	return eSelectorParsingStatus_Error;
michael@0	4397	}
michael@0	4398	aSelector.SetNameSpace(nameSpaceID);
michael@0	4399
michael@0	4400	if (! GetToken(false)) {
michael@0	4401	REPORT_UNEXPECTED_EOF(PETypeSelEOF);
michael@0	4402	return eSelectorParsingStatus_Error;
michael@0	4403	}
michael@0	4404	if (eCSSToken_Ident == mToken.mType) { // element name
michael@0	4405	aDataMask |= SEL_MASK_ELEM;
michael@0	4406	aSelector.SetTag(mToken.mIdent);
michael@0	4407	}
michael@0	4408	else if (mToken.IsSymbol('*')) { // universal selector
michael@0	4409	aDataMask |= SEL_MASK_ELEM;
michael@0	4410	// don't set tag
michael@0	4411	}
michael@0	4412	else {
michael@0	4413	REPORT_UNEXPECTED_TOKEN(PETypeSelNotType);
michael@0	4414	UngetToken();
michael@0	4415	return eSelectorParsingStatus_Error;
michael@0	4416	}
michael@0	4417	}
michael@0	4418	else { // was element name
michael@0	4419	SetDefaultNamespaceOnSelector(aSelector);
michael@0	4420	aSelector.SetTag(buffer);
michael@0	4421
michael@0	4422	aDataMask |= SEL_MASK_ELEM;
michael@0	4423	}
michael@0	4424	if (! GetToken(false)) { // premature eof is ok (here!)
michael@0	4425	return eSelectorParsingStatus_Done;
michael@0	4426	}
michael@0	4427	}
michael@0	4428	else if (mToken.IsSymbol('|')) { // No namespace
michael@0	4429	aDataMask |= SEL_MASK_NSPACE;
michael@0	4430	aSelector.SetNameSpace(kNameSpaceID_None); // explicit NO namespace
michael@0	4431
michael@0	4432	// get mandatory tag
michael@0	4433	if (! GetToken(false)) {
michael@0	4434	REPORT_UNEXPECTED_EOF(PETypeSelEOF);
michael@0	4435	return eSelectorParsingStatus_Error;
michael@0	4436	}
michael@0	4437	if (eCSSToken_Ident == mToken.mType) { // element name
michael@0	4438	aDataMask |= SEL_MASK_ELEM;
michael@0	4439	aSelector.SetTag(mToken.mIdent);
michael@0	4440	}
michael@0	4441	else if (mToken.IsSymbol('*')) { // universal selector
michael@0	4442	aDataMask |= SEL_MASK_ELEM;
michael@0	4443	// don't set tag
michael@0	4444	}
michael@0	4445	else {
michael@0	4446	REPORT_UNEXPECTED_TOKEN(PETypeSelNotType);
michael@0	4447	UngetToken();
michael@0	4448	return eSelectorParsingStatus_Error;
michael@0	4449	}
michael@0	4450	if (! GetToken(false)) { // premature eof is ok (here!)
michael@0	4451	return eSelectorParsingStatus_Done;
michael@0	4452	}
michael@0	4453	}
michael@0	4454	else {
michael@0	4455	SetDefaultNamespaceOnSelector(aSelector);
michael@0	4456	}
michael@0	4457
michael@0	4458	if (aIsNegated) {
michael@0	4459	// restore last token read in case of a negated type selector
michael@0	4460	UngetToken();
michael@0	4461	}
michael@0	4462	return eSelectorParsingStatus_Continue;
michael@0	4463	}
michael@0	4464
michael@0	4465	//
michael@0	4466	// Parse attribute selectors [attr], [attr=value], [attr|=value],
michael@0	4467	// [attr~=value], [attr^=value], [attr$=value] and [attr*=value]
michael@0	4468	//
michael@0	4469	CSSParserImpl::nsSelectorParsingStatus
michael@0	4470	CSSParserImpl::ParseAttributeSelector(int32_t& aDataMask,
michael@0	4471	nsCSSSelector& aSelector)
michael@0	4472	{
michael@0	4473	if (! GetToken(true)) { // premature EOF
michael@0	4474	REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
michael@0	4475	return eSelectorParsingStatus_Error;
michael@0	4476	}
michael@0	4477
michael@0	4478	int32_t nameSpaceID = kNameSpaceID_None;
michael@0	4479	nsAutoString attr;
michael@0	4480	if (mToken.IsSymbol('*')) { // wildcard namespace
michael@0	4481	nameSpaceID = kNameSpaceID_Unknown;
michael@0	4482	if (ExpectSymbol('|', false)) {
michael@0	4483	if (! GetToken(false)) { // premature EOF
michael@0	4484	REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
michael@0	4485	return eSelectorParsingStatus_Error;
michael@0	4486	}
michael@0	4487	if (eCSSToken_Ident == mToken.mType) { // attr name
michael@0	4488	attr = mToken.mIdent;
michael@0	4489	}
michael@0	4490	else {
michael@0	4491	REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
michael@0	4492	UngetToken();
michael@0	4493	return eSelectorParsingStatus_Error;
michael@0	4494	}
michael@0	4495	}
michael@0	4496	else {
michael@0	4497	REPORT_UNEXPECTED_TOKEN(PEAttSelNoBar);
michael@0	4498	return eSelectorParsingStatus_Error;
michael@0	4499	}
michael@0	4500	}
michael@0	4501	else if (mToken.IsSymbol('|')) { // NO namespace
michael@0	4502	if (! GetToken(false)) { // premature EOF
michael@0	4503	REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
michael@0	4504	return eSelectorParsingStatus_Error;
michael@0	4505	}
michael@0	4506	if (eCSSToken_Ident == mToken.mType) { // attr name
michael@0	4507	attr = mToken.mIdent;
michael@0	4508	}
michael@0	4509	else {
michael@0	4510	REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
michael@0	4511	UngetToken();
michael@0	4512	return eSelectorParsingStatus_Error;
michael@0	4513	}
michael@0	4514	}
michael@0	4515	else if (eCSSToken_Ident == mToken.mType) { // attr name or namespace
michael@0	4516	attr = mToken.mIdent; // hang on to it
michael@0	4517	if (ExpectSymbol('|', false)) { // was a namespace
michael@0	4518	nameSpaceID = GetNamespaceIdForPrefix(attr);
michael@0	4519	if (nameSpaceID == kNameSpaceID_Unknown) {
michael@0	4520	return eSelectorParsingStatus_Error;
michael@0	4521	}
michael@0	4522	if (! GetToken(false)) { // premature EOF
michael@0	4523	REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
michael@0	4524	return eSelectorParsingStatus_Error;
michael@0	4525	}
michael@0	4526	if (eCSSToken_Ident == mToken.mType) { // attr name
michael@0	4527	attr = mToken.mIdent;
michael@0	4528	}
michael@0	4529	else {
michael@0	4530	REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
michael@0	4531	UngetToken();
michael@0	4532	return eSelectorParsingStatus_Error;
michael@0	4533	}
michael@0	4534	}
michael@0	4535	}
michael@0	4536	else { // malformed
michael@0	4537	REPORT_UNEXPECTED_TOKEN(PEAttributeNameOrNamespaceExpected);
michael@0	4538	UngetToken();
michael@0	4539	return eSelectorParsingStatus_Error;
michael@0	4540	}
michael@0	4541
michael@0	4542	if (! GetToken(true)) { // premature EOF
michael@0	4543	REPORT_UNEXPECTED_EOF(PEAttSelInnerEOF);
michael@0	4544	return eSelectorParsingStatus_Error;
michael@0	4545	}
michael@0	4546	if ((eCSSToken_Symbol == mToken.mType) ||
michael@0	4547	(eCSSToken_Includes == mToken.mType) ||
michael@0	4548	(eCSSToken_Dashmatch == mToken.mType) ||
michael@0	4549	(eCSSToken_Beginsmatch == mToken.mType) ||
michael@0	4550	(eCSSToken_Endsmatch == mToken.mType) ||
michael@0	4551	(eCSSToken_Containsmatch == mToken.mType)) {
michael@0	4552	uint8_t func;
michael@0	4553	if (eCSSToken_Includes == mToken.mType) {
michael@0	4554	func = NS_ATTR_FUNC_INCLUDES;
michael@0	4555	}
michael@0	4556	else if (eCSSToken_Dashmatch == mToken.mType) {
michael@0	4557	func = NS_ATTR_FUNC_DASHMATCH;
michael@0	4558	}
michael@0	4559	else if (eCSSToken_Beginsmatch == mToken.mType) {
michael@0	4560	func = NS_ATTR_FUNC_BEGINSMATCH;
michael@0	4561	}
michael@0	4562	else if (eCSSToken_Endsmatch == mToken.mType) {
michael@0	4563	func = NS_ATTR_FUNC_ENDSMATCH;
michael@0	4564	}
michael@0	4565	else if (eCSSToken_Containsmatch == mToken.mType) {
michael@0	4566	func = NS_ATTR_FUNC_CONTAINSMATCH;
michael@0	4567	}
michael@0	4568	else if (']' == mToken.mSymbol) {
michael@0	4569	aDataMask |= SEL_MASK_ATTRIB;
michael@0	4570	aSelector.AddAttribute(nameSpaceID, attr);
michael@0	4571	func = NS_ATTR_FUNC_SET;
michael@0	4572	}
michael@0	4573	else if ('=' == mToken.mSymbol) {
michael@0	4574	func = NS_ATTR_FUNC_EQUALS;
michael@0	4575	}
michael@0	4576	else {
michael@0	4577	REPORT_UNEXPECTED_TOKEN(PEAttSelUnexpected);
michael@0	4578	UngetToken(); // bad function
michael@0	4579	return eSelectorParsingStatus_Error;
michael@0	4580	}
michael@0	4581	if (NS_ATTR_FUNC_SET != func) { // get value
michael@0	4582	if (! GetToken(true)) { // premature EOF
michael@0	4583	REPORT_UNEXPECTED_EOF(PEAttSelValueEOF);
michael@0	4584	return eSelectorParsingStatus_Error;
michael@0	4585	}
michael@0	4586	if ((eCSSToken_Ident == mToken.mType) || (eCSSToken_String == mToken.mType)) {
michael@0	4587	nsAutoString value(mToken.mIdent);
michael@0	4588	if (! GetToken(true)) { // premature EOF
michael@0	4589	REPORT_UNEXPECTED_EOF(PEAttSelCloseEOF);
michael@0	4590	return eSelectorParsingStatus_Error;
michael@0	4591	}
michael@0	4592	if (mToken.IsSymbol(']')) {
michael@0	4593	bool isCaseSensitive = true;
michael@0	4594
michael@0	4595	// For cases when this style sheet is applied to an HTML
michael@0	4596	// element in an HTML document, and the attribute selector is
michael@0	4597	// for a non-namespaced attribute, then check to see if it's
michael@0	4598	// one of the known attributes whose VALUE is
michael@0	4599	// case-insensitive.
michael@0	4600	if (nameSpaceID == kNameSpaceID_None) {
michael@0	4601	static const char* caseInsensitiveHTMLAttribute[] = {
michael@0	4602	// list based on http://www.w3.org/TR/html4/
michael@0	4603	"lang",
michael@0	4604	"dir",
michael@0	4605	"http-equiv",
michael@0	4606	"text",
michael@0	4607	"link",
michael@0	4608	"vlink",
michael@0	4609	"alink",
michael@0	4610	"compact",
michael@0	4611	"align",
michael@0	4612	"frame",
michael@0	4613	"rules",
michael@0	4614	"valign",
michael@0	4615	"scope",
michael@0	4616	"axis",
michael@0	4617	"nowrap",
michael@0	4618	"hreflang",
michael@0	4619	"rel",
michael@0	4620	"rev",
michael@0	4621	"charset",
michael@0	4622	"codetype",
michael@0	4623	"declare",
michael@0	4624	"valuetype",
michael@0	4625	"shape",
michael@0	4626	"nohref",
michael@0	4627	"media",
michael@0	4628	"bgcolor",
michael@0	4629	"clear",
michael@0	4630	"color",
michael@0	4631	"face",
michael@0	4632	"noshade",
michael@0	4633	"noresize",
michael@0	4634	"scrolling",
michael@0	4635	"target",
michael@0	4636	"method",
michael@0	4637	"enctype",
michael@0	4638	"accept-charset",
michael@0	4639	"accept",
michael@0	4640	"checked",
michael@0	4641	"multiple",
michael@0	4642	"selected",
michael@0	4643	"disabled",
michael@0	4644	"readonly",
michael@0	4645	"language",
michael@0	4646	"defer",
michael@0	4647	"type",
michael@0	4648	// additional attributes not in HTML4
michael@0	4649	"direction", // marquee
michael@0	4650	nullptr
michael@0	4651	};
michael@0	4652	short i = 0;
michael@0	4653	const char* htmlAttr;
michael@0	4654	while ((htmlAttr = caseInsensitiveHTMLAttribute[i++])) {
michael@0	4655	if (attr.LowerCaseEqualsASCII(htmlAttr)) {
michael@0	4656	isCaseSensitive = false;
michael@0	4657	break;
michael@0	4658	}
michael@0	4659	}
michael@0	4660	}
michael@0	4661	aDataMask |= SEL_MASK_ATTRIB;
michael@0	4662	aSelector.AddAttribute(nameSpaceID, attr, func, value, isCaseSensitive);
michael@0	4663	}
michael@0	4664	else {
michael@0	4665	REPORT_UNEXPECTED_TOKEN(PEAttSelNoClose);
michael@0	4666	UngetToken();
michael@0	4667	return eSelectorParsingStatus_Error;
michael@0	4668	}
michael@0	4669	}
michael@0	4670	else {
michael@0	4671	REPORT_UNEXPECTED_TOKEN(PEAttSelBadValue);
michael@0	4672	UngetToken();
michael@0	4673	return eSelectorParsingStatus_Error;
michael@0	4674	}
michael@0	4675	}
michael@0	4676	}
michael@0	4677	else {
michael@0	4678	REPORT_UNEXPECTED_TOKEN(PEAttSelUnexpected);
michael@0	4679	UngetToken(); // bad dog, no biscut!
michael@0	4680	return eSelectorParsingStatus_Error;
michael@0	4681	}
michael@0	4682	return eSelectorParsingStatus_Continue;
michael@0	4683	}
michael@0	4684
michael@0	4685	//
michael@0	4686	// Parse pseudo-classes and pseudo-elements
michael@0	4687	//
michael@0	4688	CSSParserImpl::nsSelectorParsingStatus
michael@0	4689	CSSParserImpl::ParsePseudoSelector(int32_t& aDataMask,
michael@0	4690	nsCSSSelector& aSelector,
michael@0	4691	bool aIsNegated,
michael@0	4692	nsIAtom** aPseudoElement,
michael@0	4693	nsAtomList** aPseudoElementArgs,
michael@0	4694	nsCSSPseudoElements::Type* aPseudoElementType)
michael@0	4695	{
michael@0	4696	NS_ASSERTION(aIsNegated || (aPseudoElement && aPseudoElementArgs),
michael@0	4697	"expected location to store pseudo element");
michael@0	4698	NS_ASSERTION(!aIsNegated || (!aPseudoElement && !aPseudoElementArgs),
michael@0	4699	"negated selectors shouldn't have a place to store "
michael@0	4700	"pseudo elements");
michael@0	4701	if (! GetToken(false)) { // premature eof
michael@0	4702	REPORT_UNEXPECTED_EOF(PEPseudoSelEOF);
michael@0	4703	return eSelectorParsingStatus_Error;
michael@0	4704	}
michael@0	4705
michael@0	4706	// First, find out whether we are parsing a CSS3 pseudo-element
michael@0	4707	bool parsingPseudoElement = false;
michael@0	4708	if (mToken.IsSymbol(':')) {
michael@0	4709	parsingPseudoElement = true;
michael@0	4710	if (! GetToken(false)) { // premature eof
michael@0	4711	REPORT_UNEXPECTED_EOF(PEPseudoSelEOF);
michael@0	4712	return eSelectorParsingStatus_Error;
michael@0	4713	}
michael@0	4714	}
michael@0	4715
michael@0	4716	// Do some sanity-checking on the token
michael@0	4717	if (eCSSToken_Ident != mToken.mType && eCSSToken_Function != mToken.mType) {
michael@0	4718	// malformed selector
michael@0	4719	REPORT_UNEXPECTED_TOKEN(PEPseudoSelBadName);
michael@0	4720	UngetToken();
michael@0	4721	return eSelectorParsingStatus_Error;
michael@0	4722	}
michael@0	4723
michael@0	4724	// OK, now we know we have an mIdent. Atomize it. All the atoms, for
michael@0	4725	// pseudo-classes as well as pseudo-elements, start with a single ':'.
michael@0	4726	nsAutoString buffer;
michael@0	4727	buffer.Append(char16_t(':'));
michael@0	4728	buffer.Append(mToken.mIdent);
michael@0	4729	nsContentUtils::ASCIIToLower(buffer);
michael@0	4730	nsCOMPtr<nsIAtom> pseudo = do_GetAtom(buffer);
michael@0	4731	if (!pseudo) {
michael@0	4732	NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
michael@0	4733	}
michael@0	4734
michael@0	4735	// stash away some info about this pseudo so we only have to get it once.
michael@0	4736	bool isTreePseudo = false;
michael@0	4737	nsCSSPseudoElements::Type pseudoElementType =
michael@0	4738	nsCSSPseudoElements::GetPseudoType(pseudo);
michael@0	4739	nsCSSPseudoClasses::Type pseudoClassType =
michael@0	4740	nsCSSPseudoClasses::GetPseudoType(pseudo);
michael@0	4741	bool pseudoClassIsUserAction =
michael@0	4742	nsCSSPseudoClasses::IsUserActionPseudoClass(pseudoClassType);
michael@0	4743
michael@0	4744	if (!mUnsafeRulesEnabled &&
michael@0	4745	pseudoElementType < nsCSSPseudoElements::ePseudo_PseudoElementCount &&
michael@0	4746	nsCSSPseudoElements::PseudoElementIsChromeOnly(pseudoElementType)) {
michael@0	4747	// This pseudo-element is not exposed to content.
michael@0	4748	REPORT_UNEXPECTED_TOKEN(PEPseudoSelUnknown);
michael@0	4749	UngetToken();
michael@0	4750	return eSelectorParsingStatus_Error;
michael@0	4751	}
michael@0	4752
michael@0	4753	// We currently allow :-moz-placeholder and ::-moz-placeholder. We have to
michael@0	4754	// be a bit stricter regarding the pseudo-element parsing rules.
michael@0	4755	if (pseudoElementType == nsCSSPseudoElements::ePseudo_mozPlaceholder &&
michael@0	4756	pseudoClassType == nsCSSPseudoClasses::ePseudoClass_mozPlaceholder) {
michael@0	4757	if (parsingPseudoElement) {
michael@0	4758	pseudoClassType = nsCSSPseudoClasses::ePseudoClass_NotPseudoClass;
michael@0	4759	} else {
michael@0	4760	pseudoElementType = nsCSSPseudoElements::ePseudo_NotPseudoElement;
michael@0	4761	}
michael@0	4762	}
michael@0	4763
michael@0	4764	#ifdef MOZ_XUL
michael@0	4765	isTreePseudo = (pseudoElementType == nsCSSPseudoElements::ePseudo_XULTree);
michael@0	4766	// If a tree pseudo-element is using the function syntax, it will
michael@0	4767	// get isTree set here and will pass the check below that only
michael@0	4768	// allows functions if they are in our list of things allowed to be
michael@0	4769	// functions. If it is _not_ using the function syntax, isTree will
michael@0	4770	// be false, and it will still pass that check. So the tree
michael@0	4771	// pseudo-elements are allowed to be either functions or not, as
michael@0	4772	// desired.
michael@0	4773	bool isTree = (eCSSToken_Function == mToken.mType) && isTreePseudo;
michael@0	4774	#endif
michael@0	4775	bool isPseudoElement =
michael@0	4776	(pseudoElementType < nsCSSPseudoElements::ePseudo_PseudoElementCount);
michael@0	4777	// anonymous boxes are only allowed if they're the tree boxes or we have
michael@0	4778	// enabled unsafe rules
michael@0	4779	bool isAnonBox = isTreePseudo ||
michael@0	4780	(pseudoElementType == nsCSSPseudoElements::ePseudo_AnonBox &&
michael@0	4781	mUnsafeRulesEnabled);
michael@0	4782	bool isPseudoClass =
michael@0	4783	(pseudoClassType != nsCSSPseudoClasses::ePseudoClass_NotPseudoClass);
michael@0	4784
michael@0	4785	NS_ASSERTION(!isPseudoClass ||
michael@0	4786	pseudoElementType == nsCSSPseudoElements::ePseudo_NotPseudoElement,
michael@0	4787	"Why is this atom both a pseudo-class and a pseudo-element?");
michael@0	4788	NS_ASSERTION(isPseudoClass + isPseudoElement + isAnonBox <= 1,
michael@0	4789	"Shouldn't be more than one of these");
michael@0	4790
michael@0	4791	if (!isPseudoClass && !isPseudoElement && !isAnonBox) {
michael@0	4792	// Not a pseudo-class, not a pseudo-element.... forget it
michael@0	4793	REPORT_UNEXPECTED_TOKEN(PEPseudoSelUnknown);
michael@0	4794	UngetToken();
michael@0	4795	return eSelectorParsingStatus_Error;
michael@0	4796	}
michael@0	4797
michael@0	4798	// If it's a function token, it better be on our "ok" list, and if the name
michael@0	4799	// is that of a function pseudo it better be a function token
michael@0	4800	if ((eCSSToken_Function == mToken.mType) !=
michael@0	4801	(
michael@0	4802	#ifdef MOZ_XUL
michael@0	4803	isTree ||
michael@0	4804	#endif
michael@0	4805	nsCSSPseudoClasses::ePseudoClass_notPseudo == pseudoClassType ||
michael@0	4806	nsCSSPseudoClasses::HasStringArg(pseudoClassType) ||
michael@0	4807	nsCSSPseudoClasses::HasNthPairArg(pseudoClassType) ||
michael@0	4808	nsCSSPseudoClasses::HasSelectorListArg(pseudoClassType))) {
michael@0	4809	// There are no other function pseudos
michael@0	4810	REPORT_UNEXPECTED_TOKEN(PEPseudoSelNonFunc);
michael@0	4811	UngetToken();
michael@0	4812	return eSelectorParsingStatus_Error;
michael@0	4813	}
michael@0	4814
michael@0	4815	// If it starts with "::", it better be a pseudo-element
michael@0	4816	if (parsingPseudoElement &&
michael@0	4817	!isPseudoElement &&
michael@0	4818	!isAnonBox) {
michael@0	4819	REPORT_UNEXPECTED_TOKEN(PEPseudoSelNotPE);
michael@0	4820	UngetToken();
michael@0	4821	return eSelectorParsingStatus_Error;
michael@0	4822	}
michael@0	4823
michael@0	4824	if (!parsingPseudoElement &&
michael@0	4825	nsCSSPseudoClasses::ePseudoClass_notPseudo == pseudoClassType) {
michael@0	4826	if (aIsNegated) { // :not() can't be itself negated
michael@0	4827	REPORT_UNEXPECTED_TOKEN(PEPseudoSelDoubleNot);
michael@0	4828	UngetToken();
michael@0	4829	return eSelectorParsingStatus_Error;
michael@0	4830	}
michael@0	4831	// CSS 3 Negation pseudo-class takes one simple selector as argument
michael@0	4832	nsSelectorParsingStatus parsingStatus =
michael@0	4833	ParseNegatedSimpleSelector(aDataMask, aSelector);
michael@0	4834	if (eSelectorParsingStatus_Continue != parsingStatus) {
michael@0	4835	return parsingStatus;
michael@0	4836	}
michael@0	4837	}
michael@0	4838	else if (!parsingPseudoElement && isPseudoClass) {
michael@0	4839	if (aSelector.IsPseudoElement()) {
michael@0	4840	nsCSSPseudoElements::Type type = aSelector.PseudoType();
michael@0	4841	if (!nsCSSPseudoElements::PseudoElementSupportsUserActionState(type)) {
michael@0	4842	// We only allow user action pseudo-classes on certain pseudo-elements.
michael@0	4843	REPORT_UNEXPECTED_TOKEN(PEPseudoSelNoUserActionPC);
michael@0	4844	UngetToken();
michael@0	4845	return eSelectorParsingStatus_Error;
michael@0	4846	}
michael@0	4847	if (!pseudoClassIsUserAction) {
michael@0	4848	// CSS 4 Selectors says that pseudo-elements can only be followed by
michael@0	4849	// a user action pseudo-class.
michael@0	4850	REPORT_UNEXPECTED_TOKEN(PEPseudoClassNotUserAction);
michael@0	4851	UngetToken();
michael@0	4852	return eSelectorParsingStatus_Error;
michael@0	4853	}
michael@0	4854	}
michael@0	4855	aDataMask |= SEL_MASK_PCLASS;
michael@0	4856	if (eCSSToken_Function == mToken.mType) {
michael@0	4857	nsSelectorParsingStatus parsingStatus;
michael@0	4858	if (nsCSSPseudoClasses::HasStringArg(pseudoClassType)) {
michael@0	4859	parsingStatus =
michael@0	4860	ParsePseudoClassWithIdentArg(aSelector, pseudoClassType);
michael@0	4861	}
michael@0	4862	else if (nsCSSPseudoClasses::HasNthPairArg(pseudoClassType)) {
michael@0	4863	parsingStatus =
michael@0	4864	ParsePseudoClassWithNthPairArg(aSelector, pseudoClassType);
michael@0	4865	}
michael@0	4866	else {
michael@0	4867	NS_ABORT_IF_FALSE(nsCSSPseudoClasses::HasSelectorListArg(pseudoClassType),
michael@0	4868	"unexpected pseudo with function token");
michael@0	4869	parsingStatus = ParsePseudoClassWithSelectorListArg(aSelector,
michael@0	4870	pseudoClassType);
michael@0	4871	}
michael@0	4872	if (eSelectorParsingStatus_Continue != parsingStatus) {
michael@0	4873	if (eSelectorParsingStatus_Error == parsingStatus) {
michael@0	4874	SkipUntil(')');
michael@0	4875	}
michael@0	4876	return parsingStatus;
michael@0	4877	}
michael@0	4878	}
michael@0	4879	else {
michael@0	4880	aSelector.AddPseudoClass(pseudoClassType);
michael@0	4881	}
michael@0	4882	}
michael@0	4883	else if (isPseudoElement || isAnonBox) {
michael@0	4884	// Pseudo-element. Make some more sanity checks.
michael@0	4885
michael@0	4886	if (aIsNegated) { // pseudo-elements can't be negated
michael@0	4887	REPORT_UNEXPECTED_TOKEN(PEPseudoSelPEInNot);
michael@0	4888	UngetToken();
michael@0	4889	return eSelectorParsingStatus_Error;
michael@0	4890	}
michael@0	4891	// CSS2 pseudo-elements and -moz-tree-* pseudo-elements are allowed
michael@0	4892	// to have a single ':' on them. Others (CSS3+ pseudo-elements and
michael@0	4893	// various -moz-* pseudo-elements) must have |parsingPseudoElement|
michael@0	4894	// set.
michael@0	4895	if (!parsingPseudoElement &&
michael@0	4896	!nsCSSPseudoElements::IsCSS2PseudoElement(pseudo)
michael@0	4897	#ifdef MOZ_XUL
michael@0	4898	&& !isTreePseudo
michael@0	4899	#endif
michael@0	4900	) {
michael@0	4901	REPORT_UNEXPECTED_TOKEN(PEPseudoSelNewStyleOnly);
michael@0	4902	UngetToken();
michael@0	4903	return eSelectorParsingStatus_Error;
michael@0	4904	}
michael@0	4905
michael@0	4906	if (0 == (aDataMask & SEL_MASK_PELEM)) {
michael@0	4907	aDataMask |= SEL_MASK_PELEM;
michael@0	4908	NS_ADDREF(*aPseudoElement = pseudo);
michael@0	4909	*aPseudoElementType = pseudoElementType;
michael@0	4910
michael@0	4911	#ifdef MOZ_XUL
michael@0	4912	if (isTree) {
michael@0	4913	// We have encountered a pseudoelement of the form
michael@0	4914	// -moz-tree-xxxx(a,b,c). We parse (a,b,c) and add each
michael@0	4915	// item in the list to the pseudoclass list. They will be pulled
michael@0	4916	// from the list later along with the pseudo-element.
michael@0	4917	if (!ParseTreePseudoElement(aPseudoElementArgs)) {
michael@0	4918	return eSelectorParsingStatus_Error;
michael@0	4919	}
michael@0	4920	}
michael@0	4921	#endif
michael@0	4922
michael@0	4923	// Pseudo-elements can only be followed by user action pseudo-classes
michael@0	4924	// or be the end of the selector. So the next non-whitespace token must
michael@0	4925	// be ':', '{' or ',' or EOF.
michael@0	4926	if (!GetToken(true)) { // premature eof is ok (here!)
michael@0	4927	return eSelectorParsingStatus_Done;
michael@0	4928	}
michael@0	4929	if (parsingPseudoElement && mToken.IsSymbol(':')) {
michael@0	4930	UngetToken();
michael@0	4931	return eSelectorParsingStatus_Continue;
michael@0	4932	}
michael@0	4933	if ((mToken.IsSymbol('{') || mToken.IsSymbol(','))) {
michael@0	4934	UngetToken();
michael@0	4935	return eSelectorParsingStatus_Done;
michael@0	4936	}
michael@0	4937	REPORT_UNEXPECTED_TOKEN(PEPseudoSelEndOrUserActionPC);
michael@0	4938	UngetToken();
michael@0	4939	return eSelectorParsingStatus_Error;
michael@0	4940	}
michael@0	4941	else { // multiple pseudo elements, not legal
michael@0	4942	REPORT_UNEXPECTED_TOKEN(PEPseudoSelMultiplePE);
michael@0	4943	UngetToken();
michael@0	4944	return eSelectorParsingStatus_Error;
michael@0	4945	}
michael@0	4946	}
michael@0	4947	#ifdef DEBUG
michael@0	4948	else {
michael@0	4949	// We should never end up here. Indeed, if we ended up here, we know (from
michael@0	4950	// the current if/else cascade) that !isPseudoElement and !isAnonBox. But
michael@0	4951	// then due to our earlier check we know that isPseudoClass. Since we
michael@0	4952	// didn't fall into the isPseudoClass case in this cascade, we must have
michael@0	4953	// parsingPseudoElement. But we've already checked the
michael@0	4954	// parsingPseudoElement && !isPseudoClass && !isAnonBox case and bailed if
michael@0	4955	// it's happened.
michael@0	4956	NS_NOTREACHED("How did this happen?");
michael@0	4957	}
michael@0	4958	#endif
michael@0	4959	return eSelectorParsingStatus_Continue;
michael@0	4960	}
michael@0	4961
michael@0	4962	//
michael@0	4963	// Parse the argument of a negation pseudo-class :not()
michael@0	4964	//
michael@0	4965	CSSParserImpl::nsSelectorParsingStatus
michael@0	4966	CSSParserImpl::ParseNegatedSimpleSelector(int32_t& aDataMask,
michael@0	4967	nsCSSSelector& aSelector)
michael@0	4968	{
michael@0	4969	if (! GetToken(true)) { // premature eof
michael@0	4970	REPORT_UNEXPECTED_EOF(PENegationEOF);
michael@0	4971	return eSelectorParsingStatus_Error;
michael@0	4972	}
michael@0	4973
michael@0	4974	if (mToken.IsSymbol(')')) {
michael@0	4975	REPORT_UNEXPECTED_TOKEN(PENegationBadArg);
michael@0	4976	return eSelectorParsingStatus_Error;
michael@0	4977	}
michael@0	4978
michael@0	4979	// Create a new nsCSSSelector and add it to the end of
michael@0	4980	// aSelector.mNegations.
michael@0	4981	// Given the current parsing rules, every selector in mNegations
michael@0	4982	// contains only one simple selector (css3 definition) within it.
michael@0	4983	// This could easily change in future versions of CSS, and the only
michael@0	4984	// thing we need to change to support that is this parsing code and the
michael@0	4985	// serialization code for nsCSSSelector.
michael@0	4986	nsCSSSelector *newSel = new nsCSSSelector();
michael@0	4987	nsCSSSelector* negations = &aSelector;
michael@0	4988	while (negations->mNegations) {
michael@0	4989	negations = negations->mNegations;
michael@0	4990	}
michael@0	4991	negations->mNegations = newSel;
michael@0	4992
michael@0	4993	nsSelectorParsingStatus parsingStatus;
michael@0	4994	if (eCSSToken_ID == mToken.mType) { // #id
michael@0	4995	parsingStatus = ParseIDSelector(aDataMask, *newSel);
michael@0	4996	}
michael@0	4997	else if (mToken.IsSymbol('.')) { // .class
michael@0	4998	parsingStatus = ParseClassSelector(aDataMask, *newSel);
michael@0	4999	}
michael@0	5000	else if (mToken.IsSymbol(':')) { // :pseudo
michael@0	5001	parsingStatus = ParsePseudoSelector(aDataMask, *newSel, true,
michael@0	5002	nullptr, nullptr, nullptr);
michael@0	5003	}
michael@0	5004	else if (mToken.IsSymbol('[')) { // [attribute
michael@0	5005	parsingStatus = ParseAttributeSelector(aDataMask, *newSel);
michael@0	5006	if (eSelectorParsingStatus_Error == parsingStatus) {
michael@0	5007	// Skip forward to the matching ']'
michael@0	5008	SkipUntil(']');
michael@0	5009	}
michael@0	5010	}
michael@0	5011	else {
michael@0	5012	// then it should be a type element or universal selector
michael@0	5013	parsingStatus = ParseTypeOrUniversalSelector(aDataMask, *newSel, true);
michael@0	5014	}
michael@0	5015	if (eSelectorParsingStatus_Error == parsingStatus) {
michael@0	5016	REPORT_UNEXPECTED_TOKEN(PENegationBadInner);
michael@0	5017	SkipUntil(')');
michael@0	5018	return parsingStatus;
michael@0	5019	}
michael@0	5020	// close the parenthesis
michael@0	5021	if (!ExpectSymbol(')', true)) {
michael@0	5022	REPORT_UNEXPECTED_TOKEN(PENegationNoClose);
michael@0	5023	SkipUntil(')');
michael@0	5024	return eSelectorParsingStatus_Error;
michael@0	5025	}
michael@0	5026
michael@0	5027	NS_ASSERTION(newSel->mNameSpace == kNameSpaceID_Unknown ||
michael@0	5028	(!newSel->mIDList && !newSel->mClassList &&
michael@0	5029	!newSel->mPseudoClassList && !newSel->mAttrList),
michael@0	5030	"Need to fix the serialization code to deal with this");
michael@0	5031
michael@0	5032	return eSelectorParsingStatus_Continue;
michael@0	5033	}
michael@0	5034
michael@0	5035	//
michael@0	5036	// Parse the argument of a pseudo-class that has an ident arg
michael@0	5037	//
michael@0	5038	CSSParserImpl::nsSelectorParsingStatus
michael@0	5039	CSSParserImpl::ParsePseudoClassWithIdentArg(nsCSSSelector& aSelector,
michael@0	5040	nsCSSPseudoClasses::Type aType)
michael@0	5041	{
michael@0	5042	if (! GetToken(true)) { // premature eof
michael@0	5043	REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
michael@0	5044	return eSelectorParsingStatus_Error;
michael@0	5045	}
michael@0	5046	// We expect an identifier with a language abbreviation
michael@0	5047	if (eCSSToken_Ident != mToken.mType) {
michael@0	5048	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotIdent);
michael@0	5049	UngetToken();
michael@0	5050	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5051	}
michael@0	5052
michael@0	5053	// -moz-locale-dir and -moz-dir can only have values of 'ltr' or 'rtl'.
michael@0	5054	if (aType == nsCSSPseudoClasses::ePseudoClass_mozLocaleDir ||
michael@0	5055	aType == nsCSSPseudoClasses::ePseudoClass_dir) {
michael@0	5056	nsContentUtils::ASCIIToLower(mToken.mIdent); // case insensitive
michael@0	5057	if (!mToken.mIdent.EqualsLiteral("ltr") &&
michael@0	5058	!mToken.mIdent.EqualsLiteral("rtl")) {
michael@0	5059	REPORT_UNEXPECTED_TOKEN(PEBadDirValue);
michael@0	5060	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5061	}
michael@0	5062	}
michael@0	5063
michael@0	5064	// Add the pseudo with the language parameter
michael@0	5065	aSelector.AddPseudoClass(aType, mToken.mIdent.get());
michael@0	5066
michael@0	5067	// close the parenthesis
michael@0	5068	if (!ExpectSymbol(')', true)) {
michael@0	5069	REPORT_UNEXPECTED_TOKEN(PEPseudoClassNoClose);
michael@0	5070	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5071	}
michael@0	5072
michael@0	5073	return eSelectorParsingStatus_Continue;
michael@0	5074	}
michael@0	5075
michael@0	5076	CSSParserImpl::nsSelectorParsingStatus
michael@0	5077	CSSParserImpl::ParsePseudoClassWithNthPairArg(nsCSSSelector& aSelector,
michael@0	5078	nsCSSPseudoClasses::Type aType)
michael@0	5079	{
michael@0	5080	int32_t numbers[2] = { 0, 0 };
michael@0	5081	int32_t sign[2] = { 1, 1 };
michael@0	5082	bool hasSign[2] = { false, false };
michael@0	5083	bool lookForB = true;
michael@0	5084
michael@0	5085	// Follow the whitespace rules as proposed in
michael@0	5086	// http://lists.w3.org/Archives/Public/www-style/2008Mar/0121.html
michael@0	5087
michael@0	5088	if (! GetToken(true)) {
michael@0	5089	REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
michael@0	5090	return eSelectorParsingStatus_Error;
michael@0	5091	}
michael@0	5092
michael@0	5093	if (mToken.IsSymbol('+') || mToken.IsSymbol('-')) {
michael@0	5094	hasSign[0] = true;
michael@0	5095	if (mToken.IsSymbol('-')) {
michael@0	5096	sign[0] = -1;
michael@0	5097	}
michael@0	5098	if (! GetToken(false)) {
michael@0	5099	REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
michael@0	5100	return eSelectorParsingStatus_Error;
michael@0	5101	}
michael@0	5102	}
michael@0	5103
michael@0	5104	if (eCSSToken_Ident == mToken.mType || eCSSToken_Dimension == mToken.mType) {
michael@0	5105	// The CSS tokenization doesn't handle :nth-child() containing - well:
michael@0	5106	// 2n-1 is a dimension
michael@0	5107	// n-1 is an identifier
michael@0	5108	// The easiest way to deal with that is to push everything from the
michael@0	5109	// minus on back onto the scanner's pushback buffer.
michael@0	5110	uint32_t truncAt = 0;
michael@0	5111	if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("n-"))) {
michael@0	5112	truncAt = 1;
michael@0	5113	} else if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("-n-")) && !hasSign[0]) {
michael@0	5114	truncAt = 2;
michael@0	5115	}
michael@0	5116	if (truncAt != 0) {
michael@0	5117	mScanner->Backup(mToken.mIdent.Length() - truncAt);
michael@0	5118	mToken.mIdent.Truncate(truncAt);
michael@0	5119	}
michael@0	5120	}
michael@0	5121
michael@0	5122	if (eCSSToken_Ident == mToken.mType) {
michael@0	5123	if (mToken.mIdent.LowerCaseEqualsLiteral("odd") && !hasSign[0]) {
michael@0	5124	numbers[0] = 2;
michael@0	5125	numbers[1] = 1;
michael@0	5126	lookForB = false;
michael@0	5127	}
michael@0	5128	else if (mToken.mIdent.LowerCaseEqualsLiteral("even") && !hasSign[0]) {
michael@0	5129	numbers[0] = 2;
michael@0	5130	numbers[1] = 0;
michael@0	5131	lookForB = false;
michael@0	5132	}
michael@0	5133	else if (mToken.mIdent.LowerCaseEqualsLiteral("n")) {
michael@0	5134	numbers[0] = sign[0];
michael@0	5135	}
michael@0	5136	else if (mToken.mIdent.LowerCaseEqualsLiteral("-n") && !hasSign[0]) {
michael@0	5137	numbers[0] = -1;
michael@0	5138	}
michael@0	5139	else {
michael@0	5140	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
michael@0	5141	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5142	}
michael@0	5143	}
michael@0	5144	else if (eCSSToken_Number == mToken.mType) {
michael@0	5145	if (!mToken.mIntegerValid) {
michael@0	5146	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
michael@0	5147	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5148	}
michael@0	5149	// for +-an case
michael@0	5150	if (mToken.mHasSign && hasSign[0]) {
michael@0	5151	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
michael@0	5152	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5153	}
michael@0	5154	int32_t intValue = mToken.mInteger * sign[0];
michael@0	5155	// for -a/**/n case
michael@0	5156	if (! GetToken(false)) {
michael@0	5157	numbers[1] = intValue;
michael@0	5158	lookForB = false;
michael@0	5159	}
michael@0	5160	else {
michael@0	5161	if (eCSSToken_Ident == mToken.mType && mToken.mIdent.LowerCaseEqualsLiteral("n")) {
michael@0	5162	numbers[0] = intValue;
michael@0	5163	}
michael@0	5164	else if (eCSSToken_Ident == mToken.mType && StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("n-"))) {
michael@0	5165	numbers[0] = intValue;
michael@0	5166	mScanner->Backup(mToken.mIdent.Length() - 1);
michael@0	5167	}
michael@0	5168	else {
michael@0	5169	UngetToken();
michael@0	5170	numbers[1] = intValue;
michael@0	5171	lookForB = false;
michael@0	5172	}
michael@0	5173	}
michael@0	5174	}
michael@0	5175	else if (eCSSToken_Dimension == mToken.mType) {
michael@0	5176	if (!mToken.mIntegerValid || !mToken.mIdent.LowerCaseEqualsLiteral("n")) {
michael@0	5177	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
michael@0	5178	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5179	}
michael@0	5180	// for +-an case
michael@0	5181	if ( mToken.mHasSign && hasSign[0] ) {
michael@0	5182	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
michael@0	5183	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5184	}
michael@0	5185	numbers[0] = mToken.mInteger * sign[0];
michael@0	5186	}
michael@0	5187	// XXX If it's a ')', is that valid? (as 0n+0)
michael@0	5188	else {
michael@0	5189	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
michael@0	5190	UngetToken();
michael@0	5191	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5192	}
michael@0	5193
michael@0	5194	if (! GetToken(true)) {
michael@0	5195	REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
michael@0	5196	return eSelectorParsingStatus_Error;
michael@0	5197	}
michael@0	5198	if (lookForB && !mToken.IsSymbol(')')) {
michael@0	5199	// The '+' or '-' sign can optionally be separated by whitespace.
michael@0	5200	// If it is separated by whitespace from what follows it, it appears
michael@0	5201	// as a separate token rather than part of the number token.
michael@0	5202	if (mToken.IsSymbol('+') || mToken.IsSymbol('-')) {
michael@0	5203	hasSign[1] = true;
michael@0	5204	if (mToken.IsSymbol('-')) {
michael@0	5205	sign[1] = -1;
michael@0	5206	}
michael@0	5207	if (! GetToken(true)) {
michael@0	5208	REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
michael@0	5209	return eSelectorParsingStatus_Error;
michael@0	5210	}
michael@0	5211	}
michael@0	5212	if (eCSSToken_Number != mToken.mType ||
michael@0	5213	!mToken.mIntegerValid || mToken.mHasSign == hasSign[1]) {
michael@0	5214	REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
michael@0	5215	UngetToken();
michael@0	5216	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5217	}
michael@0	5218	numbers[1] = mToken.mInteger * sign[1];
michael@0	5219	if (! GetToken(true)) {
michael@0	5220	REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
michael@0	5221	return eSelectorParsingStatus_Error;
michael@0	5222	}
michael@0	5223	}
michael@0	5224	if (!mToken.IsSymbol(')')) {
michael@0	5225	REPORT_UNEXPECTED_TOKEN(PEPseudoClassNoClose);
michael@0	5226	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5227	}
michael@0	5228	aSelector.AddPseudoClass(aType, numbers);
michael@0	5229	return eSelectorParsingStatus_Continue;
michael@0	5230	}
michael@0	5231
michael@0	5232	//
michael@0	5233	// Parse the argument of a pseudo-class that has a selector list argument.
michael@0	5234	// Such selector lists cannot contain combinators, but can contain
michael@0	5235	// anything that goes between a pair of combinators.
michael@0	5236	//
michael@0	5237	CSSParserImpl::nsSelectorParsingStatus
michael@0	5238	CSSParserImpl::ParsePseudoClassWithSelectorListArg(nsCSSSelector& aSelector,
michael@0	5239	nsCSSPseudoClasses::Type aType)
michael@0	5240	{
michael@0	5241	nsAutoPtr<nsCSSSelectorList> slist;
michael@0	5242	if (! ParseSelectorList(*getter_Transfers(slist), char16_t(')'))) {
michael@0	5243	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5244	}
michael@0	5245
michael@0	5246	// Check that none of the selectors in the list have combinators or
michael@0	5247	// pseudo-elements.
michael@0	5248	for (nsCSSSelectorList *l = slist; l; l = l->mNext) {
michael@0	5249	nsCSSSelector *s = l->mSelectors;
michael@0	5250	if (s->mNext || s->IsPseudoElement()) {
michael@0	5251	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5252	}
michael@0	5253	}
michael@0	5254
michael@0	5255	// Add the pseudo with the selector list parameter
michael@0	5256	aSelector.AddPseudoClass(aType, slist.forget());
michael@0	5257
michael@0	5258	// close the parenthesis
michael@0	5259	if (!ExpectSymbol(')', true)) {
michael@0	5260	REPORT_UNEXPECTED_TOKEN(PEPseudoClassNoClose);
michael@0	5261	return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
michael@0	5262	}
michael@0	5263
michael@0	5264	return eSelectorParsingStatus_Continue;
michael@0	5265	}
michael@0	5266
michael@0	5267
michael@0	5268	/**
michael@0	5269	* This is the format for selectors:
michael@0	5270	* operator? [[namespace |]? element_name]? [ ID | class | attrib | pseudo ]*
michael@0	5271	*/
michael@0	5272	bool
michael@0	5273	CSSParserImpl::ParseSelector(nsCSSSelectorList* aList,
michael@0	5274	char16_t aPrevCombinator)
michael@0	5275	{
michael@0	5276	if (! GetToken(true)) {
michael@0	5277	REPORT_UNEXPECTED_EOF(PESelectorEOF);
michael@0	5278	return false;
michael@0	5279	}
michael@0	5280
michael@0	5281	nsCSSSelector* selector = aList->AddSelector(aPrevCombinator);
michael@0	5282	nsCOMPtr<nsIAtom> pseudoElement;
michael@0	5283	nsAutoPtr<nsAtomList> pseudoElementArgs;
michael@0	5284	nsCSSPseudoElements::Type pseudoElementType =
michael@0	5285	nsCSSPseudoElements::ePseudo_NotPseudoElement;
michael@0	5286
michael@0	5287	int32_t dataMask = 0;
michael@0	5288	nsSelectorParsingStatus parsingStatus =
michael@0	5289	ParseTypeOrUniversalSelector(dataMask, *selector, false);
michael@0	5290
michael@0	5291	while (parsingStatus == eSelectorParsingStatus_Continue) {
michael@0	5292	if (eCSSToken_ID == mToken.mType) { // #id
michael@0	5293	parsingStatus = ParseIDSelector(dataMask, *selector);
michael@0	5294	}
michael@0	5295	else if (mToken.IsSymbol('.')) { // .class
michael@0	5296	parsingStatus = ParseClassSelector(dataMask, *selector);
michael@0	5297	}
michael@0	5298	else if (mToken.IsSymbol(':')) { // :pseudo
michael@0	5299	parsingStatus = ParsePseudoSelector(dataMask, *selector, false,
michael@0	5300	getter_AddRefs(pseudoElement),
michael@0	5301	getter_Transfers(pseudoElementArgs),
michael@0	5302	&pseudoElementType);
michael@0	5303	if (pseudoElement &&
michael@0	5304	pseudoElementType != nsCSSPseudoElements::ePseudo_AnonBox) {
michael@0	5305	// Pseudo-elements other than anonymous boxes are represented with
michael@0	5306	// a special ':' combinator.
michael@0	5307
michael@0	5308	aList->mWeight += selector->CalcWeight();
michael@0	5309
michael@0	5310	selector = aList->AddSelector(':');
michael@0	5311
michael@0	5312	selector->mLowercaseTag.swap(pseudoElement);
michael@0	5313	selector->mClassList = pseudoElementArgs.forget();
michael@0	5314	selector->SetPseudoType(pseudoElementType);
michael@0	5315	}
michael@0	5316	}
michael@0	5317	else if (mToken.IsSymbol('[')) { // [attribute
michael@0	5318	parsingStatus = ParseAttributeSelector(dataMask, *selector);
michael@0	5319	if (eSelectorParsingStatus_Error == parsingStatus) {
michael@0	5320	SkipUntil(']');
michael@0	5321	}
michael@0	5322	}
michael@0	5323	else { // not a selector token, we're done
michael@0	5324	parsingStatus = eSelectorParsingStatus_Done;
michael@0	5325	UngetToken();
michael@0	5326	break;
michael@0	5327	}
michael@0	5328
michael@0	5329	if (parsingStatus != eSelectorParsingStatus_Continue) {
michael@0	5330	break;
michael@0	5331	}
michael@0	5332
michael@0	5333	if (! GetToken(false)) { // premature eof is ok (here!)
michael@0	5334	parsingStatus = eSelectorParsingStatus_Done;
michael@0	5335	break;
michael@0	5336	}
michael@0	5337	}
michael@0	5338
michael@0	5339	if (parsingStatus == eSelectorParsingStatus_Error) {
michael@0	5340	return false;
michael@0	5341	}
michael@0	5342
michael@0	5343	if (!dataMask) {
michael@0	5344	if (selector->mNext) {
michael@0	5345	REPORT_UNEXPECTED(PESelectorGroupExtraCombinator);
michael@0	5346	} else {
michael@0	5347	REPORT_UNEXPECTED(PESelectorGroupNoSelector);
michael@0	5348	}
michael@0	5349	return false;
michael@0	5350	}
michael@0	5351
michael@0	5352	if (pseudoElementType == nsCSSPseudoElements::ePseudo_AnonBox) {
michael@0	5353	// We got an anonymous box pseudo-element; it must be the only
michael@0	5354	// thing in this selector group.
michael@0	5355	if (selector->mNext || !IsUniversalSelector(*selector)) {
michael@0	5356	REPORT_UNEXPECTED(PEAnonBoxNotAlone);
michael@0	5357	return false;
michael@0	5358	}
michael@0	5359
michael@0	5360	// Rewrite the current selector as this pseudo-element.
michael@0	5361	// It does not contribute to selector weight.
michael@0	5362	selector->mLowercaseTag.swap(pseudoElement);
michael@0	5363	selector->mClassList = pseudoElementArgs.forget();
michael@0	5364	selector->SetPseudoType(pseudoElementType);
michael@0	5365	return true;
michael@0	5366	}
michael@0	5367
michael@0	5368	aList->mWeight += selector->CalcWeight();
michael@0	5369
michael@0	5370	return true;
michael@0	5371	}
michael@0	5372
michael@0	5373	css::Declaration*
michael@0	5374	CSSParserImpl::ParseDeclarationBlock(uint32_t aFlags, nsCSSContextType aContext)
michael@0	5375	{
michael@0	5376	bool checkForBraces = (aFlags & eParseDeclaration_InBraces) != 0;
michael@0	5377
michael@0	5378	if (checkForBraces) {
michael@0	5379	if (!ExpectSymbol('{', true)) {
michael@0	5380	REPORT_UNEXPECTED_TOKEN(PEBadDeclBlockStart);
michael@0	5381	OUTPUT_ERROR();
michael@0	5382	return nullptr;
michael@0	5383	}
michael@0	5384	}
michael@0	5385	css::Declaration* declaration = new css::Declaration();
michael@0	5386	mData.AssertInitialState();
michael@0	5387	if (declaration) {
michael@0	5388	for (;;) {
michael@0	5389	bool changed;
michael@0	5390	if (!ParseDeclaration(declaration, aFlags, true, &changed, aContext)) {
michael@0	5391	if (!SkipDeclaration(checkForBraces)) {
michael@0	5392	break;
michael@0	5393	}
michael@0	5394	if (checkForBraces) {
michael@0	5395	if (ExpectSymbol('}', true)) {
michael@0	5396	break;
michael@0	5397	}
michael@0	5398	}
michael@0	5399	// Since the skipped declaration didn't end the block we parse
michael@0	5400	// the next declaration.
michael@0	5401	}
michael@0	5402	}
michael@0	5403	declaration->CompressFrom(&mData);
michael@0	5404	}
michael@0	5405	return declaration;
michael@0	5406	}
michael@0	5407
michael@0	5408	bool
michael@0	5409	CSSParserImpl::ParseColor(nsCSSValue& aValue)
michael@0	5410	{
michael@0	5411	if (!GetToken(true)) {
michael@0	5412	REPORT_UNEXPECTED_EOF(PEColorEOF);
michael@0	5413	return false;
michael@0	5414	}
michael@0	5415
michael@0	5416	nsCSSToken* tk = &mToken;
michael@0	5417	nscolor rgba;
michael@0	5418	switch (tk->mType) {
michael@0	5419	case eCSSToken_ID:
michael@0	5420	case eCSSToken_Hash:
michael@0	5421	// #xxyyzz
michael@0	5422	if (NS_HexToRGB(tk->mIdent, &rgba)) {
michael@0	5423	MOZ_ASSERT(tk->mIdent.Length() == 3 || tk->mIdent.Length() == 6,
michael@0	5424	"unexpected hex color length");
michael@0	5425	nsCSSUnit unit = tk->mIdent.Length() == 3 ?
michael@0	5426	eCSSUnit_ShortHexColor :
michael@0	5427	eCSSUnit_HexColor;
michael@0	5428	aValue.SetIntegerColorValue(rgba, unit);
michael@0	5429	return true;
michael@0	5430	}
michael@0	5431	break;
michael@0	5432
michael@0	5433	case eCSSToken_Ident:
michael@0	5434	if (NS_ColorNameToRGB(tk->mIdent, &rgba)) {
michael@0	5435	aValue.SetStringValue(tk->mIdent, eCSSUnit_Ident);
michael@0	5436	return true;
michael@0	5437	}
michael@0	5438	else {
michael@0	5439	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(tk->mIdent);
michael@0	5440	if (eCSSKeyword_UNKNOWN < keyword) { // known keyword
michael@0	5441	int32_t value;
michael@0	5442	if (nsCSSProps::FindKeyword(keyword, nsCSSProps::kColorKTable, value)) {
michael@0	5443	aValue.SetIntValue(value, eCSSUnit_EnumColor);
michael@0	5444	return true;
michael@0	5445	}
michael@0	5446	}
michael@0	5447	}
michael@0	5448	break;
michael@0	5449	case eCSSToken_Function:
michael@0	5450	if (mToken.mIdent.LowerCaseEqualsLiteral("rgb")) {
michael@0	5451	// rgb ( component , component , component )
michael@0	5452	if (GetToken(true)) {
michael@0	5453	UngetToken();
michael@0	5454	}
michael@0	5455	if (mToken.mType == eCSSToken_Number) {
michael@0	5456	uint8_t r, g, b;
michael@0	5457	if (ParseNumberColorComponent(r, ',') &&
michael@0	5458	ParseNumberColorComponent(g, ',') &&
michael@0	5459	ParseNumberColorComponent(b, ')')) {
michael@0	5460	aValue.SetIntegerColorValue(NS_RGB(r, g, b), eCSSUnit_RGBColor);
michael@0	5461	return true;
michael@0	5462	}
michael@0	5463	} else {
michael@0	5464	float r, g, b;
michael@0	5465	if (ParsePercentageColorComponent(r, ',') &&
michael@0	5466	ParsePercentageColorComponent(g, ',') &&
michael@0	5467	ParsePercentageColorComponent(b, ')')) {
michael@0	5468	aValue.SetFloatColorValue(r, g, b, 1.0f,
michael@0	5469	eCSSUnit_PercentageRGBColor);
michael@0	5470	return true;
michael@0	5471	}
michael@0	5472	}
michael@0	5473	SkipUntil(')');
michael@0	5474	return false;
michael@0	5475	}
michael@0	5476	else if (mToken.mIdent.LowerCaseEqualsLiteral("rgba")) {
michael@0	5477	// rgba ( component , component , component , opacity )
michael@0	5478	if (GetToken(true)) {
michael@0	5479	UngetToken();
michael@0	5480	}
michael@0	5481	if (mToken.mType == eCSSToken_Number) {
michael@0	5482	uint8_t r, g, b, a;
michael@0	5483	if (ParseNumberColorComponent(r, ',') &&
michael@0	5484	ParseNumberColorComponent(g, ',') &&
michael@0	5485	ParseNumberColorComponent(b, ',') &&
michael@0	5486	ParseColorOpacity(a)) {
michael@0	5487	aValue.SetIntegerColorValue(NS_RGBA(r, g, b, a),
michael@0	5488	eCSSUnit_RGBAColor);
michael@0	5489	return true;
michael@0	5490	}
michael@0	5491	} else {
michael@0	5492	float r, g, b, a;
michael@0	5493	if (ParsePercentageColorComponent(r, ',') &&
michael@0	5494	ParsePercentageColorComponent(g, ',') &&
michael@0	5495	ParsePercentageColorComponent(b, ',') &&
michael@0	5496	ParseColorOpacity(a)) {
michael@0	5497	aValue.SetFloatColorValue(r, g, b, a, eCSSUnit_PercentageRGBAColor);
michael@0	5498	return true;
michael@0	5499	}
michael@0	5500	}
michael@0	5501	SkipUntil(')');
michael@0	5502	return false;
michael@0	5503	}
michael@0	5504	else if (mToken.mIdent.LowerCaseEqualsLiteral("hsl")) {
michael@0	5505	// hsl ( hue , saturation , lightness )
michael@0	5506	// "hue" is a number, "saturation" and "lightness" are percentages.
michael@0	5507	float h, s, l;
michael@0	5508	if (ParseHSLColor(h, s, l, ')')) {
michael@0	5509	aValue.SetFloatColorValue(h, s, l, 1.0f, eCSSUnit_HSLColor);
michael@0	5510	return true;
michael@0	5511	}
michael@0	5512	SkipUntil(')');
michael@0	5513	return false;
michael@0	5514	}
michael@0	5515	else if (mToken.mIdent.LowerCaseEqualsLiteral("hsla")) {
michael@0	5516	// hsla ( hue , saturation , lightness , opacity )
michael@0	5517	// "hue" is a number, "saturation" and "lightness" are percentages,
michael@0	5518	// "opacity" is a number.
michael@0	5519	float h, s, l, a;
michael@0	5520	if (ParseHSLColor(h, s, l, ',') &&
michael@0	5521	ParseColorOpacity(a)) {
michael@0	5522	aValue.SetFloatColorValue(h, s, l, a, eCSSUnit_HSLAColor);
michael@0	5523	return true;
michael@0	5524	}
michael@0	5525	SkipUntil(')');
michael@0	5526	return false;
michael@0	5527	}
michael@0	5528	break;
michael@0	5529	default:
michael@0	5530	break;
michael@0	5531	}
michael@0	5532
michael@0	5533	// try 'xxyyzz' without '#' prefix for compatibility with IE and Nav4x (bug 23236 and 45804)
michael@0	5534	if (mHashlessColorQuirk) {
michael@0	5535	// - If the string starts with 'a-f', the nsCSSScanner builds the
michael@0	5536	// token as a eCSSToken_Ident and we can parse the string as a
michael@0	5537	// 'xxyyzz' RGB color.
michael@0	5538	// - If it only contains '0-9' digits, the token is a
michael@0	5539	// eCSSToken_Number and it must be converted back to a 6
michael@0	5540	// characters string to be parsed as a RGB color.
michael@0	5541	// - If it starts with '0-9' and contains any 'a-f', the token is a
michael@0	5542	// eCSSToken_Dimension, the mNumber part must be converted back to
michael@0	5543	// a string and the mIdent part must be appended to that string so
michael@0	5544	// that the resulting string has 6 characters.
michael@0	5545	// Note: This is a hack for Nav compatibility. Do not attempt to
michael@0	5546	// simplify it by hacking into the ncCSSScanner. This would be very
michael@0	5547	// bad.
michael@0	5548	nsAutoString str;
michael@0	5549	char buffer[20];
michael@0	5550	switch (tk->mType) {
michael@0	5551	case eCSSToken_Ident:
michael@0	5552	str.Assign(tk->mIdent);
michael@0	5553	break;
michael@0	5554
michael@0	5555	case eCSSToken_Number:
michael@0	5556	if (tk->mIntegerValid) {
michael@0	5557	PR_snprintf(buffer, sizeof(buffer), "%06d", tk->mInteger);
michael@0	5558	str.AssignWithConversion(buffer);
michael@0	5559	}
michael@0	5560	break;
michael@0	5561
michael@0	5562	case eCSSToken_Dimension:
michael@0	5563	if (tk->mIdent.Length() <= 6) {
michael@0	5564	PR_snprintf(buffer, sizeof(buffer), "%06.0f", tk->mNumber);
michael@0	5565	nsAutoString temp;
michael@0	5566	temp.AssignWithConversion(buffer);
michael@0	5567	temp.Right(str, 6 - tk->mIdent.Length());
michael@0	5568	str.Append(tk->mIdent);
michael@0	5569	}
michael@0	5570	break;
michael@0	5571	default:
michael@0	5572	// There is a whole bunch of cases that are
michael@0	5573	// not handled by this switch. Ignore them.
michael@0	5574	break;
michael@0	5575	}
michael@0	5576	if (NS_HexToRGB(str, &rgba)) {
michael@0	5577	aValue.SetIntegerColorValue(rgba, eCSSUnit_HexColor);
michael@0	5578	return true;
michael@0	5579	}
michael@0	5580	}
michael@0	5581
michael@0	5582	// It's not a color
michael@0	5583	REPORT_UNEXPECTED_TOKEN(PEColorNotColor);
michael@0	5584	UngetToken();
michael@0	5585	return false;
michael@0	5586	}
michael@0	5587
michael@0	5588	bool
michael@0	5589	CSSParserImpl::ParseNumberColorComponent(uint8_t& aComponent, char aStop)
michael@0	5590	{
michael@0	5591	if (!GetToken(true)) {
michael@0	5592	REPORT_UNEXPECTED_EOF(PEColorComponentEOF);
michael@0	5593	return false;
michael@0	5594	}
michael@0	5595
michael@0	5596	if (mToken.mType != eCSSToken_Number || !mToken.mIntegerValid) {
michael@0	5597	REPORT_UNEXPECTED_TOKEN(PEExpectedInt);
michael@0	5598	UngetToken();
michael@0	5599	return false;
michael@0	5600	}
michael@0	5601
michael@0	5602	float value = mToken.mNumber;
michael@0	5603	if (value < 0.0f) value = 0.0f;
michael@0	5604	if (value > 255.0f) value = 255.0f;
michael@0	5605
michael@0	5606	if (ExpectSymbol(aStop, true)) {
michael@0	5607	aComponent = NSToIntRound(value);
michael@0	5608	return true;
michael@0	5609	}
michael@0	5610	REPORT_UNEXPECTED_TOKEN_CHAR(PEColorComponentBadTerm, aStop);
michael@0	5611	return false;
michael@0	5612	}
michael@0	5613
michael@0	5614	bool
michael@0	5615	CSSParserImpl::ParsePercentageColorComponent(float& aComponent, char aStop)
michael@0	5616	{
michael@0	5617	if (!GetToken(true)) {
michael@0	5618	REPORT_UNEXPECTED_EOF(PEColorComponentEOF);
michael@0	5619	return false;
michael@0	5620	}
michael@0	5621
michael@0	5622	if (mToken.mType != eCSSToken_Percentage) {
michael@0	5623	REPORT_UNEXPECTED_TOKEN(PEExpectedPercent);
michael@0	5624	UngetToken();
michael@0	5625	return false;
michael@0	5626	}
michael@0	5627
michael@0	5628	float value = mToken.mNumber;
michael@0	5629	if (value < 0.0f) value = 0.0f;
michael@0	5630	if (value > 1.0f) value = 1.0f;
michael@0	5631
michael@0	5632	if (ExpectSymbol(aStop, true)) {
michael@0	5633	aComponent = value;
michael@0	5634	return true;
michael@0	5635	}
michael@0	5636	REPORT_UNEXPECTED_TOKEN_CHAR(PEColorComponentBadTerm, aStop);
michael@0	5637	return false;
michael@0	5638	}
michael@0	5639
michael@0	5640
michael@0	5641	bool
michael@0	5642	CSSParserImpl::ParseHSLColor(float& aHue, float& aSaturation, float& aLightness,
michael@0	5643	char aStop)
michael@0	5644	{
michael@0	5645	float h, s, l;
michael@0	5646
michael@0	5647	// Get the hue
michael@0	5648	if (!GetToken(true)) {
michael@0	5649	REPORT_UNEXPECTED_EOF(PEColorHueEOF);
michael@0	5650	return false;
michael@0	5651	}
michael@0	5652	if (mToken.mType != eCSSToken_Number) {
michael@0	5653	REPORT_UNEXPECTED_TOKEN(PEExpectedNumber);
michael@0	5654	UngetToken();
michael@0	5655	return false;
michael@0	5656	}
michael@0	5657	h = mToken.mNumber;
michael@0	5658	h /= 360.0f;
michael@0	5659	// hue values are wraparound
michael@0	5660	h = h - floor(h);
michael@0	5661
michael@0	5662	if (!ExpectSymbol(',', true)) {
michael@0	5663	REPORT_UNEXPECTED_TOKEN(PEExpectedComma);
michael@0	5664	return false;
michael@0	5665	}
michael@0	5666
michael@0	5667	// Get the saturation
michael@0	5668	if (!GetToken(true)) {
michael@0	5669	REPORT_UNEXPECTED_EOF(PEColorSaturationEOF);
michael@0	5670	return false;
michael@0	5671	}
michael@0	5672	if (mToken.mType != eCSSToken_Percentage) {
michael@0	5673	REPORT_UNEXPECTED_TOKEN(PEExpectedPercent);
michael@0	5674	UngetToken();
michael@0	5675	return false;
michael@0	5676	}
michael@0	5677	s = mToken.mNumber;
michael@0	5678	if (s < 0.0f) s = 0.0f;
michael@0	5679	if (s > 1.0f) s = 1.0f;
michael@0	5680
michael@0	5681	if (!ExpectSymbol(',', true)) {
michael@0	5682	REPORT_UNEXPECTED_TOKEN(PEExpectedComma);
michael@0	5683	return false;
michael@0	5684	}
michael@0	5685
michael@0	5686	// Get the lightness
michael@0	5687	if (!GetToken(true)) {
michael@0	5688	REPORT_UNEXPECTED_EOF(PEColorLightnessEOF);
michael@0	5689	return false;
michael@0	5690	}
michael@0	5691	if (mToken.mType != eCSSToken_Percentage) {
michael@0	5692	REPORT_UNEXPECTED_TOKEN(PEExpectedPercent);
michael@0	5693	UngetToken();
michael@0	5694	return false;
michael@0	5695	}
michael@0	5696	l = mToken.mNumber;
michael@0	5697	if (l < 0.0f) l = 0.0f;
michael@0	5698	if (l > 1.0f) l = 1.0f;
michael@0	5699
michael@0	5700	if (ExpectSymbol(aStop, true)) {
michael@0	5701	aHue = h;
michael@0	5702	aSaturation = s;
michael@0	5703	aLightness = l;
michael@0	5704	return true;
michael@0	5705	}
michael@0	5706
michael@0	5707	REPORT_UNEXPECTED_TOKEN_CHAR(PEColorComponentBadTerm, aStop);
michael@0	5708	return false;
michael@0	5709	}
michael@0	5710
michael@0	5711
michael@0	5712	bool
michael@0	5713	CSSParserImpl::ParseColorOpacity(uint8_t& aOpacity)
michael@0	5714	{
michael@0	5715	float floatOpacity;
michael@0	5716	if (!ParseColorOpacity(floatOpacity)) {
michael@0	5717	return false;
michael@0	5718	}
michael@0	5719
michael@0	5720	uint8_t value = nsStyleUtil::FloatToColorComponent(floatOpacity);
michael@0	5721	// Need to compare to something slightly larger
michael@0	5722	// than 0.5 due to floating point inaccuracies.
michael@0	5723	NS_ASSERTION(fabs(255.0f*mToken.mNumber - value) <= 0.51f,
michael@0	5724	"FloatToColorComponent did something weird");
michael@0	5725
michael@0	5726	aOpacity = value;
michael@0	5727	return true;
michael@0	5728	}
michael@0	5729
michael@0	5730	bool
michael@0	5731	CSSParserImpl::ParseColorOpacity(float& aOpacity)
michael@0	5732	{
michael@0	5733	if (!GetToken(true)) {
michael@0	5734	REPORT_UNEXPECTED_EOF(PEColorOpacityEOF);
michael@0	5735	return false;
michael@0	5736	}
michael@0	5737
michael@0	5738	if (mToken.mType != eCSSToken_Number) {
michael@0	5739	REPORT_UNEXPECTED_TOKEN(PEExpectedNumber);
michael@0	5740	UngetToken();
michael@0	5741	return false;
michael@0	5742	}
michael@0	5743
michael@0	5744	if (!ExpectSymbol(')', true)) {
michael@0	5745	REPORT_UNEXPECTED_TOKEN(PEExpectedCloseParen);
michael@0	5746	return false;
michael@0	5747	}
michael@0	5748
michael@0	5749	if (mToken.mNumber < 0.0f) {
michael@0	5750	mToken.mNumber = 0.0f;
michael@0	5751	} else if (mToken.mNumber > 1.0f) {
michael@0	5752	mToken.mNumber = 1.0f;
michael@0	5753	}
michael@0	5754
michael@0	5755	aOpacity = mToken.mNumber;
michael@0	5756	return true;
michael@0	5757	}
michael@0	5758
michael@0	5759	#ifdef MOZ_XUL
michael@0	5760	bool
michael@0	5761	CSSParserImpl::ParseTreePseudoElement(nsAtomList **aPseudoElementArgs)
michael@0	5762	{
michael@0	5763	// The argument to a tree pseudo-element is a sequence of identifiers
michael@0	5764	// that are either space- or comma-separated. (Was the intent to
michael@0	5765	// allow only comma-separated? That's not what was done.)
michael@0	5766	nsCSSSelector fakeSelector; // so we can reuse AddPseudoClass
michael@0	5767
michael@0	5768	while (!ExpectSymbol(')', true)) {
michael@0	5769	if (!GetToken(true)) {
michael@0	5770	return false;
michael@0	5771	}
michael@0	5772	if (eCSSToken_Ident == mToken.mType) {
michael@0	5773	fakeSelector.AddClass(mToken.mIdent);
michael@0	5774	}
michael@0	5775	else if (!mToken.IsSymbol(',')) {
michael@0	5776	UngetToken();
michael@0	5777	SkipUntil(')');
michael@0	5778	return false;
michael@0	5779	}
michael@0	5780	}
michael@0	5781	*aPseudoElementArgs = fakeSelector.mClassList;
michael@0	5782	fakeSelector.mClassList = nullptr;
michael@0	5783	return true;
michael@0	5784	}
michael@0	5785	#endif
michael@0	5786
michael@0	5787	//----------------------------------------------------------------------
michael@0	5788
michael@0	5789	bool
michael@0	5790	CSSParserImpl::ParseDeclaration(css::Declaration* aDeclaration,
michael@0	5791	uint32_t aFlags,
michael@0	5792	bool aMustCallValueAppended,
michael@0	5793	bool* aChanged,
michael@0	5794	nsCSSContextType aContext)
michael@0	5795	{
michael@0	5796	NS_PRECONDITION(aContext == eCSSContext_General ||
michael@0	5797	aContext == eCSSContext_Page,
michael@0	5798	"Must be page or general context");
michael@0	5799
michael@0	5800	bool checkForBraces = (aFlags & eParseDeclaration_InBraces) != 0;
michael@0	5801
michael@0	5802	mTempData.AssertInitialState();
michael@0	5803
michael@0	5804	// Get property name
michael@0	5805	nsCSSToken* tk = &mToken;
michael@0	5806	nsAutoString propertyName;
michael@0	5807	for (;;) {
michael@0	5808	if (!GetToken(true)) {
michael@0	5809	if (checkForBraces) {
michael@0	5810	REPORT_UNEXPECTED_EOF(PEDeclEndEOF);
michael@0	5811	}
michael@0	5812	return false;
michael@0	5813	}
michael@0	5814	if (eCSSToken_Ident == tk->mType) {
michael@0	5815	propertyName = tk->mIdent;
michael@0	5816	// grab the ident before the ExpectSymbol trashes the token
michael@0	5817	if (!ExpectSymbol(':', true)) {
michael@0	5818	REPORT_UNEXPECTED_TOKEN(PEParseDeclarationNoColon);
michael@0	5819	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	5820	OUTPUT_ERROR();
michael@0	5821	return false;
michael@0	5822	}
michael@0	5823	break;
michael@0	5824	}
michael@0	5825	if (tk->IsSymbol(';')) {
michael@0	5826	// dangling semicolons are skipped
michael@0	5827	continue;
michael@0	5828	}
michael@0	5829
michael@0	5830	if (!tk->IsSymbol('}')) {
michael@0	5831	REPORT_UNEXPECTED_TOKEN(PEParseDeclarationDeclExpected);
michael@0	5832	REPORT_UNEXPECTED(PEDeclSkipped);
michael@0	5833	OUTPUT_ERROR();
michael@0	5834
michael@0	5835	if (eCSSToken_AtKeyword == tk->mType) {
michael@0	5836	SkipAtRule(checkForBraces);
michael@0	5837	return true; // Not a declaration, but don't skip until ';'
michael@0	5838	}
michael@0	5839	}
michael@0	5840	// Not a declaration...
michael@0	5841	UngetToken();
michael@0	5842	return false;
michael@0	5843	}
michael@0	5844
michael@0	5845	// Don't report property parse errors if we're inside a failing @supports
michael@0	5846	// rule.
michael@0	5847	nsAutoSuppressErrors suppressErrors(this, mInFailingSupportsRule);
michael@0	5848
michael@0	5849	// Information about a parsed non-custom property.
michael@0	5850	nsCSSProperty propID;
michael@0	5851
michael@0	5852	// Information about a parsed custom property.
michael@0	5853	CSSVariableDeclarations::Type variableType;
michael@0	5854	nsString variableValue;
michael@0	5855
michael@0	5856	// Check if the property name is a custom property.
michael@0	5857	bool customProperty = nsLayoutUtils::CSSVariablesEnabled() &&
michael@0	5858	nsCSSProps::IsCustomPropertyName(propertyName) &&
michael@0	5859	aContext == eCSSContext_General;
michael@0	5860
michael@0	5861	if (customProperty) {
michael@0	5862	if (!ParseVariableDeclaration(&variableType, variableValue)) {
michael@0	5863	REPORT_UNEXPECTED_P(PEValueParsingError, propertyName);
michael@0	5864	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	5865	OUTPUT_ERROR();
michael@0	5866	return false;
michael@0	5867	}
michael@0	5868	} else {
michael@0	5869	// Map property name to its ID.
michael@0	5870	propID = LookupEnabledProperty(propertyName);
michael@0	5871	if (eCSSProperty_UNKNOWN == propID ||
michael@0	5872	(aContext == eCSSContext_Page &&
michael@0	5873	!nsCSSProps::PropHasFlags(propID,
michael@0	5874	CSS_PROPERTY_APPLIES_TO_PAGE_RULE))) { // unknown property
michael@0	5875	if (!NonMozillaVendorIdentifier(propertyName)) {
michael@0	5876	REPORT_UNEXPECTED_P(PEUnknownProperty, propertyName);
michael@0	5877	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	5878	OUTPUT_ERROR();
michael@0	5879	}
michael@0	5880	return false;
michael@0	5881	}
michael@0	5882	// Then parse the property.
michael@0	5883	if (!ParseProperty(propID)) {
michael@0	5884	// XXX Much better to put stuff in the value parsers instead...
michael@0	5885	REPORT_UNEXPECTED_P(PEValueParsingError, propertyName);
michael@0	5886	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	5887	OUTPUT_ERROR();
michael@0	5888	mTempData.ClearProperty(propID);
michael@0	5889	mTempData.AssertInitialState();
michael@0	5890	return false;
michael@0	5891	}
michael@0	5892	}
michael@0	5893
michael@0	5894	CLEAR_ERROR();
michael@0	5895
michael@0	5896	// Look for "!important".
michael@0	5897	PriorityParsingStatus status;
michael@0	5898	if ((aFlags & eParseDeclaration_AllowImportant) != 0) {
michael@0	5899	status = ParsePriority();
michael@0	5900	} else {
michael@0	5901	status = ePriority_None;
michael@0	5902	}
michael@0	5903
michael@0	5904	// Look for a semicolon or close brace.
michael@0	5905	if (status != ePriority_Error) {
michael@0	5906	if (!GetToken(true)) {
michael@0	5907	// EOF is always ok
michael@0	5908	} else if (mToken.IsSymbol(';')) {
michael@0	5909	// semicolon is always ok
michael@0	5910	} else if (mToken.IsSymbol('}')) {
michael@0	5911	// brace is ok if checkForBraces, but don't eat it
michael@0	5912	UngetToken();
michael@0	5913	if (!checkForBraces) {
michael@0	5914	status = ePriority_Error;
michael@0	5915	}
michael@0	5916	} else {
michael@0	5917	UngetToken();
michael@0	5918	status = ePriority_Error;
michael@0	5919	}
michael@0	5920	}
michael@0	5921
michael@0	5922	if (status == ePriority_Error) {
michael@0	5923	if (checkForBraces) {
michael@0	5924	REPORT_UNEXPECTED_TOKEN(PEBadDeclOrRuleEnd2);
michael@0	5925	} else {
michael@0	5926	REPORT_UNEXPECTED_TOKEN(PEBadDeclEnd);
michael@0	5927	}
michael@0	5928	REPORT_UNEXPECTED(PEDeclDropped);
michael@0	5929	OUTPUT_ERROR();
michael@0	5930	if (!customProperty) {
michael@0	5931	mTempData.ClearProperty(propID);
michael@0	5932	}
michael@0	5933	mTempData.AssertInitialState();
michael@0	5934	return false;
michael@0	5935	}
michael@0	5936
michael@0	5937	if (customProperty) {
michael@0	5938	MOZ_ASSERT(Substring(propertyName, 0,
michael@0	5939	CSS_CUSTOM_NAME_PREFIX_LENGTH).EqualsLiteral("--"));
michael@0	5940	// remove '--'
michael@0	5941	nsDependentString varName(propertyName, CSS_CUSTOM_NAME_PREFIX_LENGTH);
michael@0	5942	aDeclaration->AddVariableDeclaration(varName, variableType, variableValue,
michael@0	5943	status == ePriority_Important, false);
michael@0	5944	} else {
michael@0	5945	*aChanged |= mData.TransferFromBlock(mTempData, propID,
michael@0	5946	status == ePriority_Important,
michael@0	5947	false, aMustCallValueAppended,
michael@0	5948	aDeclaration);
michael@0	5949	}
michael@0	5950
michael@0	5951	return true;
michael@0	5952	}
michael@0	5953
michael@0	5954	static const nsCSSProperty kBorderTopIDs[] = {
michael@0	5955	eCSSProperty_border_top_width,
michael@0	5956	eCSSProperty_border_top_style,
michael@0	5957	eCSSProperty_border_top_color
michael@0	5958	};
michael@0	5959	static const nsCSSProperty kBorderRightIDs[] = {
michael@0	5960	eCSSProperty_border_right_width_value,
michael@0	5961	eCSSProperty_border_right_style_value,
michael@0	5962	eCSSProperty_border_right_color_value,
michael@0	5963	eCSSProperty_border_right_width,
michael@0	5964	eCSSProperty_border_right_style,
michael@0	5965	eCSSProperty_border_right_color
michael@0	5966	};
michael@0	5967	static const nsCSSProperty kBorderBottomIDs[] = {
michael@0	5968	eCSSProperty_border_bottom_width,
michael@0	5969	eCSSProperty_border_bottom_style,
michael@0	5970	eCSSProperty_border_bottom_color
michael@0	5971	};
michael@0	5972	static const nsCSSProperty kBorderLeftIDs[] = {
michael@0	5973	eCSSProperty_border_left_width_value,
michael@0	5974	eCSSProperty_border_left_style_value,
michael@0	5975	eCSSProperty_border_left_color_value,
michael@0	5976	eCSSProperty_border_left_width,
michael@0	5977	eCSSProperty_border_left_style,
michael@0	5978	eCSSProperty_border_left_color
michael@0	5979	};
michael@0	5980	static const nsCSSProperty kBorderStartIDs[] = {
michael@0	5981	eCSSProperty_border_start_width_value,
michael@0	5982	eCSSProperty_border_start_style_value,
michael@0	5983	eCSSProperty_border_start_color_value,
michael@0	5984	eCSSProperty_border_start_width,
michael@0	5985	eCSSProperty_border_start_style,
michael@0	5986	eCSSProperty_border_start_color
michael@0	5987	};
michael@0	5988	static const nsCSSProperty kBorderEndIDs[] = {
michael@0	5989	eCSSProperty_border_end_width_value,
michael@0	5990	eCSSProperty_border_end_style_value,
michael@0	5991	eCSSProperty_border_end_color_value,
michael@0	5992	eCSSProperty_border_end_width,
michael@0	5993	eCSSProperty_border_end_style,
michael@0	5994	eCSSProperty_border_end_color
michael@0	5995	};
michael@0	5996	static const nsCSSProperty kColumnRuleIDs[] = {
michael@0	5997	eCSSProperty__moz_column_rule_width,
michael@0	5998	eCSSProperty__moz_column_rule_style,
michael@0	5999	eCSSProperty__moz_column_rule_color
michael@0	6000	};
michael@0	6001
michael@0	6002	bool
michael@0	6003	CSSParserImpl::ParseEnum(nsCSSValue& aValue,
michael@0	6004	const KTableValue aKeywordTable[])
michael@0	6005	{
michael@0	6006	nsSubstring* ident = NextIdent();
michael@0	6007	if (nullptr == ident) {
michael@0	6008	return false;
michael@0	6009	}
michael@0	6010	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(*ident);
michael@0	6011	if (eCSSKeyword_UNKNOWN < keyword) {
michael@0	6012	int32_t value;
michael@0	6013	if (nsCSSProps::FindKeyword(keyword, aKeywordTable, value)) {
michael@0	6014	aValue.SetIntValue(value, eCSSUnit_Enumerated);
michael@0	6015	return true;
michael@0	6016	}
michael@0	6017	}
michael@0	6018
michael@0	6019	// Put the unknown identifier back and return
michael@0	6020	UngetToken();
michael@0	6021	return false;
michael@0	6022	}
michael@0	6023
michael@0	6024
michael@0	6025	struct UnitInfo {
michael@0	6026	char name[6]; // needs to be long enough for the longest unit, with
michael@0	6027	// terminating null.
michael@0	6028	uint32_t length;
michael@0	6029	nsCSSUnit unit;
michael@0	6030	int32_t type;
michael@0	6031	};
michael@0	6032
michael@0	6033	#define STR_WITH_LEN(_str) \
michael@0	6034	_str, sizeof(_str) - 1
michael@0	6035
michael@0	6036	const UnitInfo UnitData[] = {
michael@0	6037	{ STR_WITH_LEN("px"), eCSSUnit_Pixel, VARIANT_LENGTH },
michael@0	6038	{ STR_WITH_LEN("em"), eCSSUnit_EM, VARIANT_LENGTH },
michael@0	6039	{ STR_WITH_LEN("ex"), eCSSUnit_XHeight, VARIANT_LENGTH },
michael@0	6040	{ STR_WITH_LEN("pt"), eCSSUnit_Point, VARIANT_LENGTH },
michael@0	6041	{ STR_WITH_LEN("in"), eCSSUnit_Inch, VARIANT_LENGTH },
michael@0	6042	{ STR_WITH_LEN("cm"), eCSSUnit_Centimeter, VARIANT_LENGTH },
michael@0	6043	{ STR_WITH_LEN("ch"), eCSSUnit_Char, VARIANT_LENGTH },
michael@0	6044	{ STR_WITH_LEN("rem"), eCSSUnit_RootEM, VARIANT_LENGTH },
michael@0	6045	{ STR_WITH_LEN("mm"), eCSSUnit_Millimeter, VARIANT_LENGTH },
michael@0	6046	{ STR_WITH_LEN("mozmm"), eCSSUnit_PhysicalMillimeter, VARIANT_LENGTH },
michael@0	6047	{ STR_WITH_LEN("vw"), eCSSUnit_ViewportWidth, VARIANT_LENGTH },
michael@0	6048	{ STR_WITH_LEN("vh"), eCSSUnit_ViewportHeight, VARIANT_LENGTH },
michael@0	6049	{ STR_WITH_LEN("vmin"), eCSSUnit_ViewportMin, VARIANT_LENGTH },
michael@0	6050	{ STR_WITH_LEN("vmax"), eCSSUnit_ViewportMax, VARIANT_LENGTH },
michael@0	6051	{ STR_WITH_LEN("pc"), eCSSUnit_Pica, VARIANT_LENGTH },
michael@0	6052	{ STR_WITH_LEN("deg"), eCSSUnit_Degree, VARIANT_ANGLE },
michael@0	6053	{ STR_WITH_LEN("grad"), eCSSUnit_Grad, VARIANT_ANGLE },
michael@0	6054	{ STR_WITH_LEN("rad"), eCSSUnit_Radian, VARIANT_ANGLE },
michael@0	6055	{ STR_WITH_LEN("turn"), eCSSUnit_Turn, VARIANT_ANGLE },
michael@0	6056	{ STR_WITH_LEN("hz"), eCSSUnit_Hertz, VARIANT_FREQUENCY },
michael@0	6057	{ STR_WITH_LEN("khz"), eCSSUnit_Kilohertz, VARIANT_FREQUENCY },
michael@0	6058	{ STR_WITH_LEN("s"), eCSSUnit_Seconds, VARIANT_TIME },
michael@0	6059	{ STR_WITH_LEN("ms"), eCSSUnit_Milliseconds, VARIANT_TIME }
michael@0	6060	};
michael@0	6061
michael@0	6062	#undef STR_WITH_LEN
michael@0	6063
michael@0	6064	bool
michael@0	6065	CSSParserImpl::TranslateDimension(nsCSSValue& aValue,
michael@0	6066	int32_t aVariantMask,
michael@0	6067	float aNumber,
michael@0	6068	const nsString& aUnit)
michael@0	6069	{
michael@0	6070	nsCSSUnit units;
michael@0	6071	int32_t type = 0;
michael@0	6072	if (!aUnit.IsEmpty()) {
michael@0	6073	uint32_t i;
michael@0	6074	for (i = 0; i < ArrayLength(UnitData); ++i) {
michael@0	6075	if (aUnit.LowerCaseEqualsASCII(UnitData[i].name,
michael@0	6076	UnitData[i].length)) {
michael@0	6077	units = UnitData[i].unit;
michael@0	6078	type = UnitData[i].type;
michael@0	6079	break;
michael@0	6080	}
michael@0	6081	}
michael@0	6082
michael@0	6083	if (i == ArrayLength(UnitData)) {
michael@0	6084	// Unknown unit
michael@0	6085	return false;
michael@0	6086	}
michael@0	6087
michael@0	6088	if (!mViewportUnitsEnabled &&
michael@0	6089	(eCSSUnit_ViewportWidth == units ||
michael@0	6090	eCSSUnit_ViewportHeight == units ||
michael@0	6091	eCSSUnit_ViewportMin == units ||
michael@0	6092	eCSSUnit_ViewportMax == units)) {
michael@0	6093	// Viewport units aren't allowed right now, probably because we're
michael@0	6094	// inside an @page declaration. Fail.
michael@0	6095	return false;
michael@0	6096	}
michael@0	6097	} else {
michael@0	6098	// Must be a zero number...
michael@0	6099	NS_ASSERTION(0 == aNumber, "numbers without units must be 0");
michael@0	6100	if ((VARIANT_LENGTH & aVariantMask) != 0) {
michael@0	6101	units = eCSSUnit_Pixel;
michael@0	6102	type = VARIANT_LENGTH;
michael@0	6103	}
michael@0	6104	else if ((VARIANT_ANGLE & aVariantMask) != 0) {
michael@0	6105	NS_ASSERTION(aVariantMask & VARIANT_ZERO_ANGLE,
michael@0	6106	"must have allowed zero angle");
michael@0	6107	units = eCSSUnit_Degree;
michael@0	6108	type = VARIANT_ANGLE;
michael@0	6109	}
michael@0	6110	else {
michael@0	6111	NS_ERROR("Variant mask does not include dimension; why were we called?");
michael@0	6112	return false;
michael@0	6113	}
michael@0	6114	}
michael@0	6115	if ((type & aVariantMask) != 0) {
michael@0	6116	aValue.SetFloatValue(aNumber, units);
michael@0	6117	return true;
michael@0	6118	}
michael@0	6119	return false;
michael@0	6120	}
michael@0	6121
michael@0	6122	// Note that this does include VARIANT_CALC, which is numeric. This is
michael@0	6123	// because calc() parsing, as proposed, drops range restrictions inside
michael@0	6124	// the calc() expression and clamps the result of the calculation to the
michael@0	6125	// range.
michael@0	6126	#define VARIANT_ALL_NONNUMERIC \
michael@0	6127	VARIANT_KEYWORD | \
michael@0	6128	VARIANT_COLOR | \
michael@0	6129	VARIANT_URL | \
michael@0	6130	VARIANT_STRING | \
michael@0	6131	VARIANT_COUNTER | \
michael@0	6132	VARIANT_ATTR | \
michael@0	6133	VARIANT_IDENTIFIER | \
michael@0	6134	VARIANT_IDENTIFIER_NO_INHERIT | \
michael@0	6135	VARIANT_AUTO | \
michael@0	6136	VARIANT_INHERIT | \
michael@0	6137	VARIANT_NONE | \
michael@0	6138	VARIANT_NORMAL | \
michael@0	6139	VARIANT_SYSFONT | \
michael@0	6140	VARIANT_GRADIENT | \
michael@0	6141	VARIANT_TIMING_FUNCTION | \
michael@0	6142	VARIANT_ALL | \
michael@0	6143	VARIANT_CALC | \
michael@0	6144	VARIANT_OPENTYPE_SVG_KEYWORD
michael@0	6145
michael@0	6146	// Note that callers passing VARIANT_CALC in aVariantMask will get
michael@0	6147	// full-range parsing inside the calc() expression, and the code that
michael@0	6148	// computes the calc will be required to clamp the resulting value to an
michael@0	6149	// appropriate range.
michael@0	6150	bool
michael@0	6151	CSSParserImpl::ParseNonNegativeVariant(nsCSSValue& aValue,
michael@0	6152	int32_t aVariantMask,
michael@0	6153	const KTableValue aKeywordTable[])
michael@0	6154	{
michael@0	6155	// The variant mask must only contain non-numeric variants or the ones
michael@0	6156	// that we specifically handle.
michael@0	6157	NS_ABORT_IF_FALSE((aVariantMask & ~(VARIANT_ALL_NONNUMERIC |
michael@0	6158	VARIANT_NUMBER |
michael@0	6159	VARIANT_LENGTH |
michael@0	6160	VARIANT_PERCENT |
michael@0	6161	VARIANT_INTEGER)) == 0,
michael@0	6162	"need to update code below to handle additional variants");
michael@0	6163
michael@0	6164	if (ParseVariant(aValue, aVariantMask, aKeywordTable)) {
michael@0	6165	if (eCSSUnit_Number == aValue.GetUnit() ||
michael@0	6166	aValue.IsLengthUnit()){
michael@0	6167	if (aValue.GetFloatValue() < 0) {
michael@0	6168	UngetToken();
michael@0	6169	return false;
michael@0	6170	}
michael@0	6171	}
michael@0	6172	else if (aValue.GetUnit() == eCSSUnit_Percent) {
michael@0	6173	if (aValue.GetPercentValue() < 0) {
michael@0	6174	UngetToken();
michael@0	6175	return false;
michael@0	6176	}
michael@0	6177	} else if (aValue.GetUnit() == eCSSUnit_Integer) {
michael@0	6178	if (aValue.GetIntValue() < 0) {
michael@0	6179	UngetToken();
michael@0	6180	return false;
michael@0	6181	}
michael@0	6182	}
michael@0	6183	return true;
michael@0	6184	}
michael@0	6185	return false;
michael@0	6186	}
michael@0	6187
michael@0	6188	// Note that callers passing VARIANT_CALC in aVariantMask will get
michael@0	6189	// full-range parsing inside the calc() expression, and the code that
michael@0	6190	// computes the calc will be required to clamp the resulting value to an
michael@0	6191	// appropriate range.
michael@0	6192	bool
michael@0	6193	CSSParserImpl::ParseOneOrLargerVariant(nsCSSValue& aValue,
michael@0	6194	int32_t aVariantMask,
michael@0	6195	const KTableValue aKeywordTable[])
michael@0	6196	{
michael@0	6197	// The variant mask must only contain non-numeric variants or the ones
michael@0	6198	// that we specifically handle.
michael@0	6199	NS_ABORT_IF_FALSE((aVariantMask & ~(VARIANT_ALL_NONNUMERIC |
michael@0	6200	VARIANT_NUMBER |
michael@0	6201	VARIANT_INTEGER)) == 0,
michael@0	6202	"need to update code below to handle additional variants");
michael@0	6203
michael@0	6204	if (ParseVariant(aValue, aVariantMask, aKeywordTable)) {
michael@0	6205	if (aValue.GetUnit() == eCSSUnit_Integer) {
michael@0	6206	if (aValue.GetIntValue() < 1) {
michael@0	6207	UngetToken();
michael@0	6208	return false;
michael@0	6209	}
michael@0	6210	} else if (eCSSUnit_Number == aValue.GetUnit()) {
michael@0	6211	if (aValue.GetFloatValue() < 1.0f) {
michael@0	6212	UngetToken();
michael@0	6213	return false;
michael@0	6214	}
michael@0	6215	}
michael@0	6216	return true;
michael@0	6217	}
michael@0	6218	return false;
michael@0	6219	}
michael@0	6220
michael@0	6221	// Assigns to aValue iff it returns true.
michael@0	6222	bool
michael@0	6223	CSSParserImpl::ParseVariant(nsCSSValue& aValue,
michael@0	6224	int32_t aVariantMask,
michael@0	6225	const KTableValue aKeywordTable[])
michael@0	6226	{
michael@0	6227	NS_ASSERTION(!(mHashlessColorQuirk && (aVariantMask & VARIANT_COLOR)) ||
michael@0	6228	!(aVariantMask & VARIANT_NUMBER),
michael@0	6229	"can't distinguish colors from numbers");
michael@0	6230	NS_ASSERTION(!(mHashlessColorQuirk && (aVariantMask & VARIANT_COLOR)) ||
michael@0	6231	!(mUnitlessLengthQuirk && (aVariantMask & VARIANT_LENGTH)),
michael@0	6232	"can't distinguish colors from lengths");
michael@0	6233	NS_ASSERTION(!(mUnitlessLengthQuirk && (aVariantMask & VARIANT_LENGTH)) ||
michael@0	6234	!(aVariantMask & VARIANT_NUMBER),
michael@0	6235	"can't distinguish lengths from numbers");
michael@0	6236	NS_ABORT_IF_FALSE(!(aVariantMask & VARIANT_IDENTIFIER) ||
michael@0	6237	!(aVariantMask & VARIANT_IDENTIFIER_NO_INHERIT),
michael@0	6238	"must not set both VARIANT_IDENTIFIER and "
michael@0	6239	"VARIANT_IDENTIFIER_NO_INHERIT");
michael@0	6240
michael@0	6241	if (!GetToken(true)) {
michael@0	6242	return false;
michael@0	6243	}
michael@0	6244	nsCSSToken* tk = &mToken;
michael@0	6245	if (((aVariantMask & (VARIANT_AHK | VARIANT_NORMAL | VARIANT_NONE | VARIANT_ALL)) != 0) &&
michael@0	6246	(eCSSToken_Ident == tk->mType)) {
michael@0	6247	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(tk->mIdent);
michael@0	6248	if (eCSSKeyword_UNKNOWN < keyword) { // known keyword
michael@0	6249	if ((aVariantMask & VARIANT_AUTO) != 0) {
michael@0	6250	if (eCSSKeyword_auto == keyword) {
michael@0	6251	aValue.SetAutoValue();
michael@0	6252	return true;
michael@0	6253	}
michael@0	6254	}
michael@0	6255	if ((aVariantMask & VARIANT_INHERIT) != 0) {
michael@0	6256	// XXX Should we check IsParsingCompoundProperty, or do all
michael@0	6257	// callers handle it? (Not all callers set it, though, since
michael@0	6258	// they want the quirks that are disabled by setting it.)
michael@0	6259
michael@0	6260	// IMPORTANT: If new keywords are added here,
michael@0	6261	// they probably need to be added in ParseCustomIdent as well.
michael@0	6262	if (eCSSKeyword_inherit == keyword) {
michael@0	6263	aValue.SetInheritValue();
michael@0	6264	return true;
michael@0	6265	}
michael@0	6266	else if (eCSSKeyword_initial == keyword) {
michael@0	6267	aValue.SetInitialValue();
michael@0	6268	return true;
michael@0	6269	}
michael@0	6270	else if (eCSSKeyword_unset == keyword &&
michael@0	6271	nsLayoutUtils::UnsetValueEnabled()) {
michael@0	6272	aValue.SetUnsetValue();
michael@0	6273	return true;
michael@0	6274	}
michael@0	6275	}
michael@0	6276	if ((aVariantMask & VARIANT_NONE) != 0) {
michael@0	6277	if (eCSSKeyword_none == keyword) {
michael@0	6278	aValue.SetNoneValue();
michael@0	6279	return true;
michael@0	6280	}
michael@0	6281	}
michael@0	6282	if ((aVariantMask & VARIANT_ALL) != 0) {
michael@0	6283	if (eCSSKeyword_all == keyword) {
michael@0	6284	aValue.SetAllValue();
michael@0	6285	return true;
michael@0	6286	}
michael@0	6287	}
michael@0	6288	if ((aVariantMask & VARIANT_NORMAL) != 0) {
michael@0	6289	if (eCSSKeyword_normal == keyword) {
michael@0	6290	aValue.SetNormalValue();
michael@0	6291	return true;
michael@0	6292	}
michael@0	6293	}
michael@0	6294	if ((aVariantMask & VARIANT_SYSFONT) != 0) {
michael@0	6295	if (eCSSKeyword__moz_use_system_font == keyword &&
michael@0	6296	!IsParsingCompoundProperty()) {
michael@0	6297	aValue.SetSystemFontValue();
michael@0	6298	return true;
michael@0	6299	}
michael@0	6300	}
michael@0	6301	if ((aVariantMask & VARIANT_OPENTYPE_SVG_KEYWORD) != 0) {
michael@0	6302	static bool sOpentypeSVGEnabled;
michael@0	6303	static bool sOpentypeSVGEnabledCached = false;
michael@0	6304	if (!sOpentypeSVGEnabledCached) {
michael@0	6305	sOpentypeSVGEnabledCached = true;
michael@0	6306	Preferences::AddBoolVarCache(&sOpentypeSVGEnabled,
michael@0	6307	"gfx.font_rendering.opentype_svg.enabled");
michael@0	6308	}
michael@0	6309	if (sOpentypeSVGEnabled) {
michael@0	6310	aVariantMask |= VARIANT_KEYWORD;
michael@0	6311	}
michael@0	6312	}
michael@0	6313	if ((aVariantMask & VARIANT_KEYWORD) != 0) {
michael@0	6314	int32_t value;
michael@0	6315	if (nsCSSProps::FindKeyword(keyword, aKeywordTable, value)) {
michael@0	6316	aValue.SetIntValue(value, eCSSUnit_Enumerated);
michael@0	6317	return true;
michael@0	6318	}
michael@0	6319	}
michael@0	6320	}
michael@0	6321	}
michael@0	6322	// Check VARIANT_NUMBER and VARIANT_INTEGER before VARIANT_LENGTH or
michael@0	6323	// VARIANT_ZERO_ANGLE.
michael@0	6324	if (((aVariantMask & VARIANT_NUMBER) != 0) &&
michael@0	6325	(eCSSToken_Number == tk->mType)) {
michael@0	6326	aValue.SetFloatValue(tk->mNumber, eCSSUnit_Number);
michael@0	6327	return true;
michael@0	6328	}
michael@0	6329	if (((aVariantMask & VARIANT_INTEGER) != 0) &&
michael@0	6330	(eCSSToken_Number == tk->mType) && tk->mIntegerValid) {
michael@0	6331	aValue.SetIntValue(tk->mInteger, eCSSUnit_Integer);
michael@0	6332	return true;
michael@0	6333	}
michael@0	6334	if (((aVariantMask & (VARIANT_LENGTH | VARIANT_ANGLE |
michael@0	6335	VARIANT_FREQUENCY | VARIANT_TIME)) != 0 &&
michael@0	6336	eCSSToken_Dimension == tk->mType) ||
michael@0	6337	((aVariantMask & (VARIANT_LENGTH | VARIANT_ZERO_ANGLE)) != 0 &&
michael@0	6338	eCSSToken_Number == tk->mType &&
michael@0	6339	tk->mNumber == 0.0f)) {
michael@0	6340	if (((aVariantMask & VARIANT_POSITIVE_DIMENSION) != 0 &&
michael@0	6341	tk->mNumber <= 0.0) ||
michael@0	6342	((aVariantMask & VARIANT_NONNEGATIVE_DIMENSION) != 0 &&
michael@0	6343	tk->mNumber < 0.0)) {
michael@0	6344	UngetToken();
michael@0	6345	return false;
michael@0	6346	}
michael@0	6347	if (TranslateDimension(aValue, aVariantMask, tk->mNumber, tk->mIdent)) {
michael@0	6348	return true;
michael@0	6349	}
michael@0	6350	// Put the token back; we didn't parse it, so we shouldn't consume it
michael@0	6351	UngetToken();
michael@0	6352	return false;
michael@0	6353	}
michael@0	6354	if (((aVariantMask & VARIANT_PERCENT) != 0) &&
michael@0	6355	(eCSSToken_Percentage == tk->mType)) {
michael@0	6356	aValue.SetPercentValue(tk->mNumber);
michael@0	6357	return true;
michael@0	6358	}
michael@0	6359	if (mUnitlessLengthQuirk) { // NONSTANDARD: Nav interprets unitless numbers as px
michael@0	6360	if (((aVariantMask & VARIANT_LENGTH) != 0) &&
michael@0	6361	(eCSSToken_Number == tk->mType)) {
michael@0	6362	aValue.SetFloatValue(tk->mNumber, eCSSUnit_Pixel);
michael@0	6363	return true;
michael@0	6364	}
michael@0	6365	}
michael@0	6366
michael@0	6367	if (IsSVGMode() && !IsParsingCompoundProperty()) {
michael@0	6368	// STANDARD: SVG Spec states that lengths and coordinates can be unitless
michael@0	6369	// in which case they default to user-units (1 px = 1 user unit)
michael@0	6370	if (((aVariantMask & VARIANT_LENGTH) != 0) &&
michael@0	6371	(eCSSToken_Number == tk->mType)) {
michael@0	6372	aValue.SetFloatValue(tk->mNumber, eCSSUnit_Pixel);
michael@0	6373	return true;
michael@0	6374	}
michael@0	6375	}
michael@0	6376
michael@0	6377	if (((aVariantMask & VARIANT_URL) != 0) &&
michael@0	6378	eCSSToken_URL == tk->mType) {
michael@0	6379	SetValueToURL(aValue, tk->mIdent);
michael@0	6380	return true;
michael@0	6381	}
michael@0	6382	if ((aVariantMask & VARIANT_GRADIENT) != 0 &&
michael@0	6383	eCSSToken_Function == tk->mType) {
michael@0	6384	// a generated gradient
michael@0	6385	nsDependentString tmp(tk->mIdent, 0);
michael@0	6386	bool isLegacy = false;
michael@0	6387	if (StringBeginsWith(tmp, NS_LITERAL_STRING("-moz-"))) {
michael@0	6388	tmp.Rebind(tmp, 5);
michael@0	6389	isLegacy = true;
michael@0	6390	}
michael@0	6391	bool isRepeating = false;
michael@0	6392	if (StringBeginsWith(tmp, NS_LITERAL_STRING("repeating-"))) {
michael@0	6393	tmp.Rebind(tmp, 10);
michael@0	6394	isRepeating = true;
michael@0	6395	}
michael@0	6396
michael@0	6397	if (tmp.LowerCaseEqualsLiteral("linear-gradient")) {
michael@0	6398	return ParseLinearGradient(aValue, isRepeating, isLegacy);
michael@0	6399	}
michael@0	6400	if (tmp.LowerCaseEqualsLiteral("radial-gradient")) {
michael@0	6401	return ParseRadialGradient(aValue, isRepeating, isLegacy);
michael@0	6402	}
michael@0	6403	}
michael@0	6404	if ((aVariantMask & VARIANT_IMAGE_RECT) != 0 &&
michael@0	6405	eCSSToken_Function == tk->mType &&
michael@0	6406	tk->mIdent.LowerCaseEqualsLiteral("-moz-image-rect")) {
michael@0	6407	return ParseImageRect(aValue);
michael@0	6408	}
michael@0	6409	if ((aVariantMask & VARIANT_ELEMENT) != 0 &&
michael@0	6410	eCSSToken_Function == tk->mType &&
michael@0	6411	tk->mIdent.LowerCaseEqualsLiteral("-moz-element")) {
michael@0	6412	return ParseElement(aValue);
michael@0	6413	}
michael@0	6414	if ((aVariantMask & VARIANT_COLOR) != 0) {
michael@0	6415	if (mHashlessColorQuirk || // NONSTANDARD: Nav interprets 'xxyyzz' values even without '#' prefix
michael@0	6416	(eCSSToken_ID == tk->mType) ||
michael@0	6417	(eCSSToken_Hash == tk->mType) ||
michael@0	6418	(eCSSToken_Ident == tk->mType) ||
michael@0	6419	((eCSSToken_Function == tk->mType) &&
michael@0	6420	(tk->mIdent.LowerCaseEqualsLiteral("rgb") ||
michael@0	6421	tk->mIdent.LowerCaseEqualsLiteral("hsl") ||
michael@0	6422	tk->mIdent.LowerCaseEqualsLiteral("rgba") ||
michael@0	6423	tk->mIdent.LowerCaseEqualsLiteral("hsla"))))
michael@0	6424	{
michael@0	6425	// Put token back so that parse color can get it
michael@0	6426	UngetToken();
michael@0	6427	if (ParseColor(aValue)) {
michael@0	6428	return true;
michael@0	6429	}
michael@0	6430	return false;
michael@0	6431	}
michael@0	6432	}
michael@0	6433	if (((aVariantMask & VARIANT_STRING) != 0) &&
michael@0	6434	(eCSSToken_String == tk->mType)) {
michael@0	6435	nsAutoString buffer;
michael@0	6436	buffer.Append(tk->mIdent);
michael@0	6437	aValue.SetStringValue(buffer, eCSSUnit_String);
michael@0	6438	return true;
michael@0	6439	}
michael@0	6440	if (((aVariantMask &
michael@0	6441	(VARIANT_IDENTIFIER | VARIANT_IDENTIFIER_NO_INHERIT)) != 0) &&
michael@0	6442	(eCSSToken_Ident == tk->mType) &&
michael@0	6443	((aVariantMask & VARIANT_IDENTIFIER) != 0 ||
michael@0	6444	!(tk->mIdent.LowerCaseEqualsLiteral("inherit") ||
michael@0	6445	tk->mIdent.LowerCaseEqualsLiteral("initial") ||
michael@0	6446	(tk->mIdent.LowerCaseEqualsLiteral("unset") &&
michael@0	6447	nsLayoutUtils::UnsetValueEnabled())))) {
michael@0	6448	aValue.SetStringValue(tk->mIdent, eCSSUnit_Ident);
michael@0	6449	return true;
michael@0	6450	}
michael@0	6451	if (((aVariantMask & VARIANT_COUNTER) != 0) &&
michael@0	6452	(eCSSToken_Function == tk->mType) &&
michael@0	6453	(tk->mIdent.LowerCaseEqualsLiteral("counter") ||
michael@0	6454	tk->mIdent.LowerCaseEqualsLiteral("counters"))) {
michael@0	6455	return ParseCounter(aValue);
michael@0	6456	}
michael@0	6457	if (((aVariantMask & VARIANT_ATTR) != 0) &&
michael@0	6458	(eCSSToken_Function == tk->mType) &&
michael@0	6459	tk->mIdent.LowerCaseEqualsLiteral("attr")) {
michael@0	6460	if (!ParseAttr(aValue)) {
michael@0	6461	SkipUntil(')');
michael@0	6462	return false;
michael@0	6463	}
michael@0	6464	return true;
michael@0	6465	}
michael@0	6466	if (((aVariantMask & VARIANT_TIMING_FUNCTION) != 0) &&
michael@0	6467	(eCSSToken_Function == tk->mType)) {
michael@0	6468	if (tk->mIdent.LowerCaseEqualsLiteral("cubic-bezier")) {
michael@0	6469	if (!ParseTransitionTimingFunctionValues(aValue)) {
michael@0	6470	SkipUntil(')');
michael@0	6471	return false;
michael@0	6472	}
michael@0	6473	return true;
michael@0	6474	}
michael@0	6475	if (tk->mIdent.LowerCaseEqualsLiteral("steps")) {
michael@0	6476	if (!ParseTransitionStepTimingFunctionValues(aValue)) {
michael@0	6477	SkipUntil(')');
michael@0	6478	return false;
michael@0	6479	}
michael@0	6480	return true;
michael@0	6481	}
michael@0	6482	}
michael@0	6483	if ((aVariantMask & VARIANT_CALC) &&
michael@0	6484	(eCSSToken_Function == tk->mType) &&
michael@0	6485	(tk->mIdent.LowerCaseEqualsLiteral("calc") ||
michael@0	6486	tk->mIdent.LowerCaseEqualsLiteral("-moz-calc"))) {
michael@0	6487	// calc() currently allows only lengths and percents inside it.
michael@0	6488	return ParseCalc(aValue, aVariantMask & VARIANT_LP);
michael@0	6489	}
michael@0	6490
michael@0	6491	UngetToken();
michael@0	6492	return false;
michael@0	6493	}
michael@0	6494
michael@0	6495	bool
michael@0	6496	CSSParserImpl::ParseCustomIdent(nsCSSValue& aValue,
michael@0	6497	const nsAutoString& aIdentValue,
michael@0	6498	const nsCSSKeyword aExcludedKeywords[],
michael@0	6499	const nsCSSProps::KTableValue aPropertyKTable[])
michael@0	6500	{
michael@0	6501	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(aIdentValue);
michael@0	6502	if (keyword == eCSSKeyword_UNKNOWN) {
michael@0	6503	// Fast path for identifiers that are not known CSS keywords:
michael@0	6504	aValue.SetStringValue(mToken.mIdent, eCSSUnit_Ident);
michael@0	6505	return true;
michael@0	6506	}
michael@0	6507	if (keyword == eCSSKeyword_inherit ||
michael@0	6508	keyword == eCSSKeyword_initial ||
michael@0	6509	keyword == eCSSKeyword_unset ||
michael@0	6510	keyword == eCSSKeyword_default ||
michael@0	6511	(aPropertyKTable &&
michael@0	6512	nsCSSProps::FindIndexOfKeyword(keyword, aPropertyKTable) >= 0)) {
michael@0	6513	return false;
michael@0	6514	}
michael@0	6515	if (aExcludedKeywords) {
michael@0	6516	for (uint32_t i = 0;; i++) {
michael@0	6517	nsCSSKeyword excludedKeyword = aExcludedKeywords[i];
michael@0	6518	if (excludedKeyword == eCSSKeyword_UNKNOWN) {
michael@0	6519	break;
michael@0	6520	}
michael@0	6521	if (excludedKeyword == keyword) {
michael@0	6522	return false;
michael@0	6523	}
michael@0	6524	}
michael@0	6525	}
michael@0	6526	aValue.SetStringValue(mToken.mIdent, eCSSUnit_Ident);
michael@0	6527	return true;
michael@0	6528	}
michael@0	6529
michael@0	6530	bool
michael@0	6531	CSSParserImpl::ParseCounter(nsCSSValue& aValue)
michael@0	6532	{
michael@0	6533	nsCSSUnit unit = (mToken.mIdent.LowerCaseEqualsLiteral("counter") ?
michael@0	6534	eCSSUnit_Counter : eCSSUnit_Counters);
michael@0	6535
michael@0	6536	// A non-iterative for loop to break out when an error occurs.
michael@0	6537	for (;;) {
michael@0	6538	if (!GetToken(true)) {
michael@0	6539	break;
michael@0	6540	}
michael@0	6541	if (eCSSToken_Ident != mToken.mType) {
michael@0	6542	UngetToken();
michael@0	6543	break;
michael@0	6544	}
michael@0	6545
michael@0	6546	nsRefPtr<nsCSSValue::Array> val =
michael@0	6547	nsCSSValue::Array::Create(unit == eCSSUnit_Counter ? 2 : 3);
michael@0	6548
michael@0	6549	val->Item(0).SetStringValue(mToken.mIdent, eCSSUnit_Ident);
michael@0	6550
michael@0	6551	if (eCSSUnit_Counters == unit) {
michael@0	6552	// must have a comma and then a separator string
michael@0	6553	if (!ExpectSymbol(',', true) || !GetToken(true)) {
michael@0	6554	break;
michael@0	6555	}
michael@0	6556	if (eCSSToken_String != mToken.mType) {
michael@0	6557	UngetToken();
michael@0	6558	break;
michael@0	6559	}
michael@0	6560	val->Item(1).SetStringValue(mToken.mIdent, eCSSUnit_String);
michael@0	6561	}
michael@0	6562
michael@0	6563	// get optional type
michael@0	6564	int32_t type = NS_STYLE_LIST_STYLE_DECIMAL;
michael@0	6565	if (ExpectSymbol(',', true)) {
michael@0	6566	if (!GetToken(true)) {
michael@0	6567	break;
michael@0	6568	}
michael@0	6569	nsCSSKeyword keyword;
michael@0	6570	if (eCSSToken_Ident != mToken.mType ||
michael@0	6571	(keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent)) ==
michael@0	6572	eCSSKeyword_UNKNOWN ||
michael@0	6573	!nsCSSProps::FindKeyword(keyword, nsCSSProps::kListStyleKTable,
michael@0	6574	type)) {
michael@0	6575	UngetToken();
michael@0	6576	break;
michael@0	6577	}
michael@0	6578	}
michael@0	6579
michael@0	6580	int32_t typeItem = eCSSUnit_Counters == unit ? 2 : 1;
michael@0	6581	val->Item(typeItem).SetIntValue(type, eCSSUnit_Enumerated);
michael@0	6582
michael@0	6583	if (!ExpectSymbol(')', true)) {
michael@0	6584	break;
michael@0	6585	}
michael@0	6586
michael@0	6587	aValue.SetArrayValue(val, unit);
michael@0	6588	return true;
michael@0	6589	}
michael@0	6590
michael@0	6591	SkipUntil(')');
michael@0	6592	return false;
michael@0	6593	}
michael@0	6594
michael@0	6595	bool
michael@0	6596	CSSParserImpl::ParseAttr(nsCSSValue& aValue)
michael@0	6597	{
michael@0	6598	if (!GetToken(true)) {
michael@0	6599	return false;
michael@0	6600	}
michael@0	6601
michael@0	6602	nsAutoString attr;
michael@0	6603	if (eCSSToken_Ident == mToken.mType) { // attr name or namespace
michael@0	6604	nsAutoString holdIdent(mToken.mIdent);
michael@0	6605	if (ExpectSymbol('|', false)) { // namespace
michael@0	6606	int32_t nameSpaceID = GetNamespaceIdForPrefix(holdIdent);
michael@0	6607	if (nameSpaceID == kNameSpaceID_Unknown) {
michael@0	6608	return false;
michael@0	6609	}
michael@0	6610	attr.AppendInt(nameSpaceID, 10);
michael@0	6611	attr.Append(char16_t('|'));
michael@0	6612	if (! GetToken(false)) {
michael@0	6613	REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
michael@0	6614	return false;
michael@0	6615	}
michael@0	6616	if (eCSSToken_Ident == mToken.mType) {
michael@0	6617	attr.Append(mToken.mIdent);
michael@0	6618	}
michael@0	6619	else {
michael@0	6620	REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
michael@0	6621	UngetToken();
michael@0	6622	return false;
michael@0	6623	}
michael@0	6624	}
michael@0	6625	else { // no namespace
michael@0	6626	attr = holdIdent;
michael@0	6627	}
michael@0	6628	}
michael@0	6629	else if (mToken.IsSymbol('*')) { // namespace wildcard
michael@0	6630	// Wildcard namespace makes no sense here and is not allowed
michael@0	6631	REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
michael@0	6632	UngetToken();
michael@0	6633	return false;
michael@0	6634	}
michael@0	6635	else if (mToken.IsSymbol('|')) { // explicit NO namespace
michael@0	6636	if (! GetToken(false)) {
michael@0	6637	REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
michael@0	6638	return false;
michael@0	6639	}
michael@0	6640	if (eCSSToken_Ident == mToken.mType) {
michael@0	6641	attr.Append(mToken.mIdent);
michael@0	6642	}
michael@0	6643	else {
michael@0	6644	REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
michael@0	6645	UngetToken();
michael@0	6646	return false;
michael@0	6647	}
michael@0	6648	}
michael@0	6649	else {
michael@0	6650	REPORT_UNEXPECTED_TOKEN(PEAttributeNameOrNamespaceExpected);
michael@0	6651	UngetToken();
michael@0	6652	return false;
michael@0	6653	}
michael@0	6654	if (!ExpectSymbol(')', true)) {
michael@0	6655	return false;
michael@0	6656	}
michael@0	6657	aValue.SetStringValue(attr, eCSSUnit_Attr);
michael@0	6658	return true;
michael@0	6659	}
michael@0	6660
michael@0	6661	bool
michael@0	6662	CSSParserImpl::SetValueToURL(nsCSSValue& aValue, const nsString& aURL)
michael@0	6663	{
michael@0	6664	if (!mSheetPrincipal) {
michael@0	6665	NS_NOTREACHED("Codepaths that expect to parse URLs MUST pass in an "
michael@0	6666	"origin principal");
michael@0	6667	return false;
michael@0	6668	}
michael@0	6669
michael@0	6670	nsRefPtr<nsStringBuffer> buffer(nsCSSValue::BufferFromString(aURL));
michael@0	6671
michael@0	6672	// Note: urlVal retains its own reference to |buffer|.
michael@0	6673	mozilla::css::URLValue *urlVal =
michael@0	6674	new mozilla::css::URLValue(buffer, mBaseURI, mSheetURI, mSheetPrincipal);
michael@0	6675	aValue.SetURLValue(urlVal);
michael@0	6676	return true;
michael@0	6677	}
michael@0	6678
michael@0	6679	/**
michael@0	6680	* Parse the image-orientation property, which has the grammar:
michael@0	6681	* <angle> flip? | flip | from-image
michael@0	6682	*/
michael@0	6683	bool
michael@0	6684	CSSParserImpl::ParseImageOrientation(nsCSSValue& aValue)
michael@0	6685	{
michael@0	6686	if (ParseVariant(aValue, VARIANT_INHERIT, nullptr)) {
michael@0	6687	// 'inherit', 'initial' and 'unset' must be alone
michael@0	6688	return true;
michael@0	6689	}
michael@0	6690
michael@0	6691	// Check for an angle with optional 'flip'.
michael@0	6692	nsCSSValue angle;
michael@0	6693	if (ParseVariant(angle, VARIANT_ANGLE, nullptr)) {
michael@0	6694	nsCSSValue flip;
michael@0	6695
michael@0	6696	if (ParseVariant(flip, VARIANT_KEYWORD, nsCSSProps::kImageOrientationFlipKTable)) {
michael@0	6697	nsRefPtr<nsCSSValue::Array> array = nsCSSValue::Array::Create(2);
michael@0	6698	array->Item(0) = angle;
michael@0	6699	array->Item(1) = flip;
michael@0	6700	aValue.SetArrayValue(array, eCSSUnit_Array);
michael@0	6701	} else {
michael@0	6702	aValue = angle;
michael@0	6703	}
michael@0	6704
michael@0	6705	return true;
michael@0	6706	}
michael@0	6707
michael@0	6708	// The remaining possibilities (bare 'flip' and 'from-image') are both
michael@0	6709	// keywords, so we can handle them at the same time.
michael@0	6710	nsCSSValue keyword;
michael@0	6711	if (ParseVariant(keyword, VARIANT_KEYWORD, nsCSSProps::kImageOrientationKTable)) {
michael@0	6712	aValue = keyword;
michael@0	6713	return true;
michael@0	6714	}
michael@0	6715
michael@0	6716	// All possibilities failed.
michael@0	6717	return false;
michael@0	6718	}
michael@0	6719
michael@0	6720	/**
michael@0	6721	* Parse the arguments of -moz-image-rect() function.
michael@0	6722	* -moz-image-rect(<uri>, <top>, <right>, <bottom>, <left>)
michael@0	6723	*/
michael@0	6724	bool
michael@0	6725	CSSParserImpl::ParseImageRect(nsCSSValue& aImage)
michael@0	6726	{
michael@0	6727	// A non-iterative for loop to break out when an error occurs.
michael@0	6728	for (;;) {
michael@0	6729	nsCSSValue newFunction;
michael@0	6730	static const uint32_t kNumArgs = 5;
michael@0	6731	nsCSSValue::Array* func =
michael@0	6732	newFunction.InitFunction(eCSSKeyword__moz_image_rect, kNumArgs);
michael@0	6733
michael@0	6734	// func->Item(0) is reserved for the function name.
michael@0	6735	nsCSSValue& url = func->Item(1);
michael@0	6736	nsCSSValue& top = func->Item(2);
michael@0	6737	nsCSSValue& right = func->Item(3);
michael@0	6738	nsCSSValue& bottom = func->Item(4);
michael@0	6739	nsCSSValue& left = func->Item(5);
michael@0	6740
michael@0	6741	nsAutoString urlString;
michael@0	6742	if (!ParseURLOrString(urlString) ||
michael@0	6743	!SetValueToURL(url, urlString) ||
michael@0	6744	!ExpectSymbol(',', true)) {
michael@0	6745	break;
michael@0	6746	}
michael@0	6747
michael@0	6748	static const int32_t VARIANT_SIDE = VARIANT_NUMBER | VARIANT_PERCENT;
michael@0	6749	if (!ParseNonNegativeVariant(top, VARIANT_SIDE, nullptr) ||
michael@0	6750	!ExpectSymbol(',', true) ||
michael@0	6751	!ParseNonNegativeVariant(right, VARIANT_SIDE, nullptr) ||
michael@0	6752	!ExpectSymbol(',', true) ||
michael@0	6753	!ParseNonNegativeVariant(bottom, VARIANT_SIDE, nullptr) ||
michael@0	6754	!ExpectSymbol(',', true) ||
michael@0	6755	!ParseNonNegativeVariant(left, VARIANT_SIDE, nullptr) ||
michael@0	6756	!ExpectSymbol(')', true))
michael@0	6757	break;
michael@0	6758
michael@0	6759	aImage = newFunction;
michael@0	6760	return true;
michael@0	6761	}
michael@0	6762
michael@0	6763	SkipUntil(')');
michael@0	6764	return false;
michael@0	6765	}
michael@0	6766
michael@0	6767	// <element>: -moz-element(# <element_id> )
michael@0	6768	bool
michael@0	6769	CSSParserImpl::ParseElement(nsCSSValue& aValue)
michael@0	6770	{
michael@0	6771	// A non-iterative for loop to break out when an error occurs.
michael@0	6772	for (;;) {
michael@0	6773	if (!GetToken(true))
michael@0	6774	break;
michael@0	6775
michael@0	6776	if (mToken.mType == eCSSToken_ID) {
michael@0	6777	aValue.SetStringValue(mToken.mIdent, eCSSUnit_Element);
michael@0	6778	} else {
michael@0	6779	UngetToken();
michael@0	6780	break;
michael@0	6781	}
michael@0	6782
michael@0	6783	if (!ExpectSymbol(')', true))
michael@0	6784	break;
michael@0	6785
michael@0	6786	return true;
michael@0	6787	}
michael@0	6788
michael@0	6789	// If we detect a syntax error, we must match the opening parenthesis of the
michael@0	6790	// function with the closing parenthesis and skip all the tokens in between.
michael@0	6791	SkipUntil(')');
michael@0	6792	return false;
michael@0	6793	}
michael@0	6794
michael@0	6795	// flex: none | [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
michael@0	6796	bool
michael@0	6797	CSSParserImpl::ParseFlex()
michael@0	6798	{
michael@0	6799	// First check for inherit / initial / unset
michael@0	6800	nsCSSValue tmpVal;
michael@0	6801	if (ParseVariant(tmpVal, VARIANT_INHERIT, nullptr)) {
michael@0	6802	AppendValue(eCSSProperty_flex_grow, tmpVal);
michael@0	6803	AppendValue(eCSSProperty_flex_shrink, tmpVal);
michael@0	6804	AppendValue(eCSSProperty_flex_basis, tmpVal);
michael@0	6805	return true;
michael@0	6806	}
michael@0	6807
michael@0	6808	// Next, check for 'none' == '0 0 auto'
michael@0	6809	if (ParseVariant(tmpVal, VARIANT_NONE, nullptr)) {
michael@0	6810	AppendValue(eCSSProperty_flex_grow, nsCSSValue(0.0f, eCSSUnit_Number));
michael@0	6811	AppendValue(eCSSProperty_flex_shrink, nsCSSValue(0.0f, eCSSUnit_Number));
michael@0	6812	AppendValue(eCSSProperty_flex_basis, nsCSSValue(eCSSUnit_Auto));
michael@0	6813	return true;
michael@0	6814	}
michael@0	6815
michael@0	6816	// OK, try parsing our value as individual per-subproperty components:
michael@0	6817	// [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
michael@0	6818
michael@0	6819	// Each subproperty has a default value that it takes when it's omitted in a
michael@0	6820	// "flex" shorthand value. These default values are *only* for the shorthand
michael@0	6821	// syntax -- they're distinct from the subproperties' own initial values. We
michael@0	6822	// start with each subproperty at its default, as if we had "flex: 1 1 0%".
michael@0	6823	nsCSSValue flexGrow(1.0f, eCSSUnit_Number);
michael@0	6824	nsCSSValue flexShrink(1.0f, eCSSUnit_Number);
michael@0	6825	nsCSSValue flexBasis(0.0f, eCSSUnit_Percent);
michael@0	6826
michael@0	6827	// OVERVIEW OF PARSING STRATEGY:
michael@0	6828	// =============================
michael@0	6829	// a) Parse the first component as either flex-basis or flex-grow.
michael@0	6830	// b) If it wasn't flex-grow, parse the _next_ component as flex-grow.
michael@0	6831	// c) Now we've just parsed flex-grow -- so try parsing the next thing as
michael@0	6832	// flex-shrink.
michael@0	6833	// d) Finally: If we didn't get flex-basis at the beginning, try to parse
michael@0	6834	// it now, at the end.
michael@0	6835	//
michael@0	6836	// More details in each section below.
michael@0	6837
michael@0	6838	uint32_t flexBasisVariantMask =
michael@0	6839	(nsCSSProps::ParserVariant(eCSSProperty_flex_basis) & ~(VARIANT_INHERIT));
michael@0	6840
michael@0	6841	// (a) Parse first component. It can be either be a 'flex-basis' value or a
michael@0	6842	// 'flex-grow' value, so we use the flex-basis-specific variant mask, along
michael@0	6843	// with VARIANT_NUMBER to accept 'flex-grow' values.
michael@0	6844	//
michael@0	6845	// NOTE: if we encounter unitless 0 here, we *must* interpret it as a
michael@0	6846	// 'flex-grow' value (a number), *not* as a 'flex-basis' value (a length).
michael@0	6847	// Conveniently, that's the behavior this combined variant-mask gives us --
michael@0	6848	// it'll treat unitless 0 as a number. The flexbox spec requires this:
michael@0	6849	// "a unitless zero that is not already preceded by two flex factors must be
michael@0	6850	// interpreted as a flex factor.
michael@0	6851	if (!ParseNonNegativeVariant(tmpVal, flexBasisVariantMask | VARIANT_NUMBER,
michael@0	6852	nsCSSProps::kWidthKTable)) {
michael@0	6853	// First component was not a valid flex-basis or flex-grow value. Fail.
michael@0	6854	return false;
michael@0	6855	}
michael@0	6856
michael@0	6857	// Record what we just parsed as either flex-basis or flex-grow:
michael@0	6858	bool wasFirstComponentFlexBasis = (tmpVal.GetUnit() != eCSSUnit_Number);
michael@0	6859	(wasFirstComponentFlexBasis ? flexBasis : flexGrow) = tmpVal;
michael@0	6860
michael@0	6861	// (b) If we didn't get flex-grow yet, parse _next_ component as flex-grow.
michael@0	6862	bool doneParsing = false;
michael@0	6863	if (wasFirstComponentFlexBasis) {
michael@0	6864	if (ParseNonNegativeVariant(tmpVal, VARIANT_NUMBER, nullptr)) {
michael@0	6865	flexGrow = tmpVal;
michael@0	6866	} else {
michael@0	6867	// Failed to parse anything after our flex-basis -- that's fine. We can
michael@0	6868	// skip the remaining parsing.
michael@0	6869	doneParsing = true;
michael@0	6870	}
michael@0	6871	}
michael@0	6872
michael@0	6873	if (!doneParsing) {
michael@0	6874	// (c) OK -- the last thing we parsed was flex-grow, so look for a
michael@0	6875	// flex-shrink in the next position.
michael@0	6876	if (ParseNonNegativeVariant(tmpVal, VARIANT_NUMBER, nullptr)) {
michael@0	6877	flexShrink = tmpVal;
michael@0	6878	}
michael@0	6879
michael@0	6880	// d) Finally: If we didn't get flex-basis at the beginning, try to parse
michael@0	6881	// it now, at the end.
michael@0	6882	//
michael@0	6883	// NOTE: If we encounter unitless 0 in this final position, we'll parse it
michael@0	6884	// as a 'flex-basis' value. That's OK, because we know it must have
michael@0	6885	// been "preceded by 2 flex factors" (justification below), which gets us
michael@0	6886	// out of the spec's requirement of otherwise having to treat unitless 0
michael@0	6887	// as a flex factor.
michael@0	6888	//
michael@0	6889	// JUSTIFICATION: How do we know that a unitless 0 here must have been
michael@0	6890	// preceded by 2 flex factors? Well, suppose we had a unitless 0 that
michael@0	6891	// was preceded by only 1 flex factor. Then, we would have already
michael@0	6892	// accepted this unitless 0 as the 'flex-shrink' value, up above (since
michael@0	6893	// it's a valid flex-shrink value), and we'd have moved on to the next
michael@0	6894	// token (if any). And of course, if we instead had a unitless 0 preceded
michael@0	6895	// by *no* flex factors (if it were the first token), we would've already
michael@0	6896	// parsed it in our very first call to ParseNonNegativeVariant(). So, any
michael@0	6897	// unitless 0 encountered here *must* have been preceded by 2 flex factors.
michael@0	6898	if (!wasFirstComponentFlexBasis &&
michael@0	6899	ParseNonNegativeVariant(tmpVal, flexBasisVariantMask,
michael@0	6900	nsCSSProps::kWidthKTable)) {
michael@0	6901	flexBasis = tmpVal;
michael@0	6902	}
michael@0	6903	}
michael@0	6904
michael@0	6905	AppendValue(eCSSProperty_flex_grow, flexGrow);
michael@0	6906	AppendValue(eCSSProperty_flex_shrink, flexShrink);
michael@0	6907	AppendValue(eCSSProperty_flex_basis, flexBasis);
michael@0	6908
michael@0	6909	return true;
michael@0	6910	}
michael@0	6911
michael@0	6912	// flex-flow: <flex-direction> || <flex-wrap>
michael@0	6913	bool
michael@0	6914	CSSParserImpl::ParseFlexFlow()
michael@0	6915	{
michael@0	6916	static const nsCSSProperty kFlexFlowSubprops[] = {
michael@0	6917	eCSSProperty_flex_direction,
michael@0	6918	eCSSProperty_flex_wrap
michael@0	6919	};
michael@0	6920	const size_t numProps = MOZ_ARRAY_LENGTH(kFlexFlowSubprops);
michael@0	6921	nsCSSValue values[numProps];
michael@0	6922
michael@0	6923	int32_t found = ParseChoice(values, kFlexFlowSubprops, numProps);
michael@0	6924
michael@0	6925	// Bail if we didn't successfully parse anything
michael@0	6926	if (found < 1) {
michael@0	6927	return false;
michael@0	6928	}
michael@0	6929
michael@0	6930	// If either property didn't get an explicit value, use its initial value.
michael@0	6931	if ((found & 1) == 0) {
michael@0	6932	values[0].SetIntValue(NS_STYLE_FLEX_DIRECTION_ROW, eCSSUnit_Enumerated);
michael@0	6933	}
michael@0	6934	if ((found & 2) == 0) {
michael@0	6935	values[1].SetIntValue(NS_STYLE_FLEX_WRAP_NOWRAP, eCSSUnit_Enumerated);
michael@0	6936	}
michael@0	6937
michael@0	6938	// Store these values and declare success!
michael@0	6939	for (size_t i = 0; i < numProps; i++) {
michael@0	6940	AppendValue(kFlexFlowSubprops[i], values[i]);
michael@0	6941	}
michael@0	6942	return true;
michael@0	6943	}
michael@0	6944
michael@0	6945	bool
michael@0	6946	CSSParserImpl::ParseGridAutoFlow()
michael@0	6947	{
michael@0	6948	nsCSSValue value;
michael@0	6949	if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	6950	AppendValue(eCSSProperty_grid_auto_flow, value);
michael@0	6951	return true;
michael@0	6952	}
michael@0	6953
michael@0	6954	static const int32_t mask[] = {
michael@0	6955	NS_STYLE_GRID_AUTO_FLOW_COLUMN | NS_STYLE_GRID_AUTO_FLOW_ROW,
michael@0	6956	MASK_END_VALUE
michael@0	6957	};
michael@0	6958	if (!ParseBitmaskValues(value, nsCSSProps::kGridAutoFlowKTable, mask)) {
michael@0	6959	return false;
michael@0	6960	}
michael@0	6961	int32_t bitField = value.GetIntValue();
michael@0	6962
michael@0	6963	// Requires one of these
michael@0	6964	if (!(bitField & NS_STYLE_GRID_AUTO_FLOW_NONE ||
michael@0	6965	bitField & NS_STYLE_GRID_AUTO_FLOW_COLUMN ||
michael@0	6966	bitField & NS_STYLE_GRID_AUTO_FLOW_ROW)) {
michael@0	6967	return false;
michael@0	6968	}
michael@0	6969
michael@0	6970	// 'none' is only valid if it occurs alone:
michael@0	6971	if (bitField & NS_STYLE_GRID_AUTO_FLOW_NONE &&
michael@0	6972	bitField != NS_STYLE_GRID_AUTO_FLOW_NONE) {
michael@0	6973	return false;
michael@0	6974	}
michael@0	6975
michael@0	6976	AppendValue(eCSSProperty_grid_auto_flow, value);
michael@0	6977	return true;
michael@0	6978	}
michael@0	6979
michael@0	6980	CSSParseResult
michael@0	6981	CSSParserImpl::ParseGridLineNames(nsCSSValue& aValue)
michael@0	6982	{
michael@0	6983	if (!ExpectSymbol('(', true)) {
michael@0	6984	return CSSParseResult::NotFound;
michael@0	6985	}
michael@0	6986	if (!GetToken(true) || mToken.IsSymbol(')')) {
michael@0	6987	return CSSParseResult::Ok;
michael@0	6988	}
michael@0	6989	// 'return' so far leaves aValue untouched, to represent an empty list.
michael@0	6990
michael@0	6991	nsCSSValueList* item;
michael@0	6992	if (aValue.GetUnit() == eCSSUnit_List) {
michael@0	6993	// Find the end of an existing list.
michael@0	6994	// The grid-template shorthand uses this, at most once for a given list.
michael@0	6995
michael@0	6996	// NOTE: we could avoid this traversal by somehow keeping around
michael@0	6997	// a pointer to the last item from the previous call.
michael@0	6998	// It's not yet clear if this is worth the additional code complexity.
michael@0	6999	item = aValue.GetListValue();
michael@0	7000	while (item->mNext) {
michael@0	7001	item = item->mNext;
michael@0	7002	}
michael@0	7003	item->mNext = new nsCSSValueList;
michael@0	7004	item = item->mNext;
michael@0	7005	} else {
michael@0	7006	MOZ_ASSERT(aValue.GetUnit() == eCSSUnit_Null, "Unexpected unit");
michael@0	7007	item = aValue.SetListValue();
michael@0	7008	}
michael@0	7009	for (;;) {
michael@0	7010	if (!(eCSSToken_Ident == mToken.mType &&
michael@0	7011	ParseCustomIdent(item->mValue, mToken.mIdent))) {
michael@0	7012	UngetToken();
michael@0	7013	SkipUntil(')');
michael@0	7014	return CSSParseResult::Error;
michael@0	7015	}
michael@0	7016	if (!GetToken(true) || mToken.IsSymbol(')')) {
michael@0	7017	return CSSParseResult::Ok;
michael@0	7018	}
michael@0	7019	item->mNext = new nsCSSValueList;
michael@0	7020	item = item->mNext;
michael@0	7021	}
michael@0	7022	}
michael@0	7023
michael@0	7024	// Assuming the 'repeat(' function token has already been consumed,
michael@0	7025	// parse the rest of repeat(<positive-integer>, <line-names>+)
michael@0	7026	// Append to the linked list whose end is given by |aTailPtr|,
michael@0	7027	// and updated |aTailPtr| to point to the new end of the list.
michael@0	7028	bool
michael@0	7029	CSSParserImpl::ParseGridLineNameListRepeat(nsCSSValueList** aTailPtr)
michael@0	7030	{
michael@0	7031	if (!(GetToken(true) &&
michael@0	7032	mToken.mType == eCSSToken_Number &&
michael@0	7033	mToken.mIntegerValid &&
michael@0	7034	mToken.mInteger > 0)) {
michael@0	7035	SkipUntil(')');
michael@0	7036	return false;
michael@0	7037	}
michael@0	7038	int32_t repetitions = std::min(mToken.mInteger,
michael@0	7039	GRID_TEMPLATE_MAX_REPETITIONS);
michael@0	7040	if (!ExpectSymbol(',', true)) {
michael@0	7041	SkipUntil(')');
michael@0	7042	return false;
michael@0	7043	}
michael@0	7044
michael@0	7045	// Parse at least one <line-names>
michael@0	7046	nsCSSValueList* tail = *aTailPtr;
michael@0	7047	do {
michael@0	7048	tail->mNext = new nsCSSValueList;
michael@0	7049	tail = tail->mNext;
michael@0	7050	if (ParseGridLineNames(tail->mValue) != CSSParseResult::Ok) {
michael@0	7051	SkipUntil(')');
michael@0	7052	return false;
michael@0	7053	}
michael@0	7054	} while (!ExpectSymbol(')', true));
michael@0	7055	nsCSSValueList* firstRepeatedItem = (*aTailPtr)->mNext;
michael@0	7056	nsCSSValueList* lastRepeatedItem = tail;
michael@0	7057
michael@0	7058	// Our repeated items are already in the target list once,
michael@0	7059	// so they need to be repeated |repetitions - 1| more times.
michael@0	7060	MOZ_ASSERT(repetitions > 0, "Expected positive repetitions");
michael@0	7061	while (--repetitions) {
michael@0	7062	nsCSSValueList* repeatedItem = firstRepeatedItem;
michael@0	7063	for (;;) {
michael@0	7064	tail->mNext = new nsCSSValueList;
michael@0	7065	tail = tail->mNext;
michael@0	7066	tail->mValue = repeatedItem->mValue;
michael@0	7067	if (repeatedItem == lastRepeatedItem) {
michael@0	7068	break;
michael@0	7069	}
michael@0	7070	repeatedItem = repeatedItem->mNext;
michael@0	7071	}
michael@0	7072	}
michael@0	7073	*aTailPtr = tail;
michael@0	7074	return true;
michael@0	7075	}
michael@0	7076
michael@0	7077	// Assuming a 'subgrid' keyword was already consumed, parse <line-name-list>?
michael@0	7078	bool
michael@0	7079	CSSParserImpl::ParseOptionalLineNameListAfterSubgrid(nsCSSValue& aValue)
michael@0	7080	{
michael@0	7081	nsCSSValueList* item = aValue.SetListValue();
michael@0	7082	// This marker distinguishes the value from a <track-list>.
michael@0	7083	item->mValue.SetIntValue(NS_STYLE_GRID_TEMPLATE_SUBGRID,
michael@0	7084	eCSSUnit_Enumerated);
michael@0	7085	for (;;) {
michael@0	7086	// First try to parse repeat(<positive-integer>, <line-names>+)
michael@0	7087	if (!GetToken(true)) {
michael@0	7088	return true;
michael@0	7089	}
michael@0	7090	if (mToken.mType == eCSSToken_Function &&
michael@0	7091	mToken.mIdent.LowerCaseEqualsLiteral("repeat")) {
michael@0	7092	if (!ParseGridLineNameListRepeat(&item)) {
michael@0	7093	return false;
michael@0	7094	}
michael@0	7095	} else {
michael@0	7096	UngetToken();
michael@0	7097
michael@0	7098	// This was not a repeat() function. Try to parse <line-names>.
michael@0	7099	nsCSSValue lineNames;
michael@0	7100	CSSParseResult result = ParseGridLineNames(lineNames);
michael@0	7101	if (result == CSSParseResult::NotFound) {
michael@0	7102	return true;
michael@0	7103	}
michael@0	7104	if (result == CSSParseResult::Error) {
michael@0	7105	return false;
michael@0	7106	}
michael@0	7107	item->mNext = new nsCSSValueList;
michael@0	7108	item = item->mNext;
michael@0	7109	item->mValue = lineNames;
michael@0	7110	}
michael@0	7111	}
michael@0	7112	}
michael@0	7113
michael@0	7114	// Parse a <track-breadth>
michael@0	7115	bool
michael@0	7116	CSSParserImpl::ParseGridTrackBreadth(nsCSSValue& aValue)
michael@0	7117	{
michael@0	7118	if (ParseNonNegativeVariant(aValue,
michael@0	7119	VARIANT_LPCALC | VARIANT_KEYWORD,
michael@0	7120	nsCSSProps::kGridTrackBreadthKTable)) {
michael@0	7121	return true;
michael@0	7122	}
michael@0	7123
michael@0	7124	// Attempt to parse <flex> (a dimension with the "fr" unit)
michael@0	7125	if (!GetToken(true)) {
michael@0	7126	return false;
michael@0	7127	}
michael@0	7128	if (!(eCSSToken_Dimension == mToken.mType &&
michael@0	7129	mToken.mIdent.LowerCaseEqualsLiteral("fr") &&
michael@0	7130	mToken.mNumber >= 0)) {
michael@0	7131	UngetToken();
michael@0	7132	return false;
michael@0	7133	}
michael@0	7134	aValue.SetFloatValue(mToken.mNumber, eCSSUnit_FlexFraction);
michael@0	7135	return true;
michael@0	7136	}
michael@0	7137
michael@0	7138	// Parse a <track-size>
michael@0	7139	CSSParseResult
michael@0	7140	CSSParserImpl::ParseGridTrackSize(nsCSSValue& aValue)
michael@0	7141	{
michael@0	7142	// Attempt to parse 'auto' or a single <track-breadth>
michael@0	7143	if (ParseGridTrackBreadth(aValue) ||
michael@0	7144	ParseVariant(aValue, VARIANT_AUTO, nullptr)) {
michael@0	7145	return CSSParseResult::Ok;
michael@0	7146	}
michael@0	7147
michael@0	7148	// Attempt to parse a minmax() function
michael@0	7149	if (!GetToken(true)) {
michael@0	7150	return CSSParseResult::NotFound;
michael@0	7151	}
michael@0	7152	if (!(eCSSToken_Function == mToken.mType &&
michael@0	7153	mToken.mIdent.LowerCaseEqualsLiteral("minmax"))) {
michael@0	7154	UngetToken();
michael@0	7155	return CSSParseResult::NotFound;
michael@0	7156	}
michael@0	7157	nsCSSValue::Array* func = aValue.InitFunction(eCSSKeyword_minmax, 2);
michael@0	7158	if (ParseGridTrackBreadth(func->Item(1)) &&
michael@0	7159	ExpectSymbol(',', true) &&
michael@0	7160	ParseGridTrackBreadth(func->Item(2)) &&
michael@0	7161	ExpectSymbol(')', true)) {
michael@0	7162	return CSSParseResult::Ok;
michael@0	7163	}
michael@0	7164	SkipUntil(')');
michael@0	7165	return CSSParseResult::Error;
michael@0	7166	}
michael@0	7167
michael@0	7168	bool
michael@0	7169	CSSParserImpl::ParseGridAutoColumnsRows(nsCSSProperty aPropID)
michael@0	7170	{
michael@0	7171	nsCSSValue value;
michael@0	7172	if (ParseVariant(value, VARIANT_INHERIT, nullptr) ||
michael@0	7173	ParseGridTrackSize(value) == CSSParseResult::Ok) {
michael@0	7174	AppendValue(aPropID, value);
michael@0	7175	return true;
michael@0	7176	}
michael@0	7177	return false;
michael@0	7178	}
michael@0	7179
michael@0	7180	bool
michael@0	7181	CSSParserImpl::ParseGridTrackListWithFirstLineNames(nsCSSValue& aValue,
michael@0	7182	const nsCSSValue& aFirstLineNames)
michael@0	7183	{
michael@0	7184	nsCSSValueList* firstLineNamesItem = aValue.SetListValue();
michael@0	7185	firstLineNamesItem->mValue = aFirstLineNames;
michael@0	7186
michael@0	7187	// This function is trying to parse <track-list>, which is
michael@0	7188	// [ <line-names>? [ <track-size> | <repeat()> ] ]+ <line-names>?
michael@0	7189	// and we're already past the first "<line-names>?".
michael@0	7190	//
michael@0	7191	// Each iteration of the following loop attempts to parse either a
michael@0	7192	// repeat() or a <track-size> expression, and then an (optional)
michael@0	7193	// <line-names> expression.
michael@0	7194	//
michael@0	7195	// The only successful exit point from this loop is the ::NotFound
michael@0	7196	// case after ParseGridTrackSize(); i.e. we'll greedily parse
michael@0	7197	// repeat()/<track-size> until we can't find one.
michael@0	7198	nsCSSValueList* item = firstLineNamesItem;
michael@0	7199	for (;;) {
michael@0	7200	// First try to parse repeat()
michael@0	7201	if (!GetToken(true)) {
michael@0	7202	break;
michael@0	7203	}
michael@0	7204	if (mToken.mType == eCSSToken_Function &&
michael@0	7205	mToken.mIdent.LowerCaseEqualsLiteral("repeat")) {
michael@0	7206	if (!ParseGridTrackListRepeat(&item)) {
michael@0	7207	return false;
michael@0	7208	}
michael@0	7209	} else {
michael@0	7210	UngetToken();
michael@0	7211
michael@0	7212	// This was not a repeat() function. Try to parse <track-size>.
michael@0	7213	nsCSSValue trackSize;
michael@0	7214	CSSParseResult result = ParseGridTrackSize(trackSize);
michael@0	7215	if (result == CSSParseResult::Error) {
michael@0	7216	return false;
michael@0	7217	}
michael@0	7218	if (result == CSSParseResult::NotFound) {
michael@0	7219	// What we've parsed so far is a valid <track-list>
michael@0	7220	// (modulo the "at least one <track-size>" check below.)
michael@0	7221	// Stop here.
michael@0	7222	break;
michael@0	7223	}
michael@0	7224	item->mNext = new nsCSSValueList;
michael@0	7225	item = item->mNext;
michael@0	7226	item->mValue = trackSize;
michael@0	7227
michael@0	7228	item->mNext = new nsCSSValueList;
michael@0	7229	item = item->mNext;
michael@0	7230	}
michael@0	7231	if (ParseGridLineNames(item->mValue) == CSSParseResult::Error) {
michael@0	7232	return false;
michael@0	7233	}
michael@0	7234	}
michael@0	7235
michael@0	7236	// Require at least one <track-size>.
michael@0	7237	if (item == firstLineNamesItem) {
michael@0	7238	return false;
michael@0	7239	}
michael@0	7240
michael@0	7241	MOZ_ASSERT(aValue.GetListValue() &&
michael@0	7242	aValue.GetListValue()->mNext &&
michael@0	7243	aValue.GetListValue()->mNext->mNext,
michael@0	7244	"<track-list> should have a minimum length of 3");
michael@0	7245	return true;
michael@0	7246	}
michael@0	7247
michael@0	7248	// Takes ownership of |aSecond|
michael@0	7249	static void
michael@0	7250	ConcatLineNames(nsCSSValue& aFirst, nsCSSValue& aSecond)
michael@0	7251	{
michael@0	7252	if (aSecond.GetUnit() == eCSSUnit_Null) {
michael@0	7253	// Nothing to do.
michael@0	7254	return;
michael@0	7255	}
michael@0	7256	if (aFirst.GetUnit() == eCSSUnit_Null) {
michael@0	7257	// Empty or omitted <line-names>. Replace it.
michael@0	7258	aFirst = aSecond;
michael@0	7259	return;
michael@0	7260	}
michael@0	7261
michael@0	7262	// Join the two <line-names> lists.
michael@0	7263	nsCSSValueList* source = aSecond.GetListValue();
michael@0	7264	nsCSSValueList* target = aFirst.GetListValue();
michael@0	7265	// Find the end:
michael@0	7266	while (target->mNext) {
michael@0	7267	target = target->mNext;
michael@0	7268	}
michael@0	7269	// Copy the first name. We can't take ownership of it
michael@0	7270	// as it'll be destroyed when |aSecond| goes out of scope.
michael@0	7271	target->mNext = new nsCSSValueList;
michael@0	7272	target = target->mNext;
michael@0	7273	target->mValue = source->mValue;
michael@0	7274	// Move the rest of the linked list.
michael@0	7275	target->mNext = source->mNext;
michael@0	7276	source->mNext = nullptr;
michael@0	7277	}
michael@0	7278
michael@0	7279	// Assuming the 'repeat(' function token has already been consumed,
michael@0	7280	// parse the rest of
michael@0	7281	// repeat( <positive-integer> ,
michael@0	7282	// [ <line-names>? <track-size> ]+ <line-names>? )
michael@0	7283	// Append to the linked list whose end is given by |aTailPtr|,
michael@0	7284	// and updated |aTailPtr| to point to the new end of the list.
michael@0	7285	bool
michael@0	7286	CSSParserImpl::ParseGridTrackListRepeat(nsCSSValueList** aTailPtr)
michael@0	7287	{
michael@0	7288	if (!(GetToken(true) &&
michael@0	7289	mToken.mType == eCSSToken_Number &&
michael@0	7290	mToken.mIntegerValid &&
michael@0	7291	mToken.mInteger > 0)) {
michael@0	7292	SkipUntil(')');
michael@0	7293	return false;
michael@0	7294	}
michael@0	7295	int32_t repetitions = std::min(mToken.mInteger,
michael@0	7296	GRID_TEMPLATE_MAX_REPETITIONS);
michael@0	7297	if (!ExpectSymbol(',', true)) {
michael@0	7298	SkipUntil(')');
michael@0	7299	return false;
michael@0	7300	}
michael@0	7301
michael@0	7302	// Parse [ <line-names>? <track-size> ]+ <line-names>?
michael@0	7303	// but keep the first and last <line-names> separate
michael@0	7304	// because they'll need to be joined.
michael@0	7305	// http://dev.w3.org/csswg/css-grid/#repeat-notation
michael@0	7306	nsCSSValue firstLineNames;
michael@0	7307	nsCSSValue trackSize;
michael@0	7308	nsCSSValue lastLineNames;
michael@0	7309	// Optional
michael@0	7310	if (ParseGridLineNames(firstLineNames) == CSSParseResult::Error) {
michael@0	7311	SkipUntil(')');
michael@0	7312	return false;
michael@0	7313	}
michael@0	7314	// Required
michael@0	7315	if (ParseGridTrackSize(trackSize) != CSSParseResult::Ok) {
michael@0	7316	SkipUntil(')');
michael@0	7317	return false;
michael@0	7318	}
michael@0	7319	// Use nsAutoPtr to free the list in case of early return.
michael@0	7320	nsAutoPtr<nsCSSValueList> firstTrackSizeItemAuto(new nsCSSValueList);
michael@0	7321	firstTrackSizeItemAuto->mValue = trackSize;
michael@0	7322
michael@0	7323	nsCSSValueList* item = firstTrackSizeItemAuto;
michael@0	7324	for (;;) {
michael@0	7325	// Optional
michael@0	7326	if (ParseGridLineNames(lastLineNames) == CSSParseResult::Error) {
michael@0	7327	SkipUntil(')');
michael@0	7328	return false;
michael@0	7329	}
michael@0	7330
michael@0	7331	if (ExpectSymbol(')', true)) {
michael@0	7332	break;
michael@0	7333	}
michael@0	7334
michael@0	7335	// Required
michael@0	7336	if (ParseGridTrackSize(trackSize) != CSSParseResult::Ok) {
michael@0	7337	SkipUntil(')');
michael@0	7338	return false;
michael@0	7339	}
michael@0	7340
michael@0	7341	item->mNext = new nsCSSValueList;
michael@0	7342	item = item->mNext;
michael@0	7343	item->mValue = lastLineNames;
michael@0	7344	// Do not append to this list at the next iteration.
michael@0	7345	lastLineNames.Reset();
michael@0	7346
michael@0	7347	item->mNext = new nsCSSValueList;
michael@0	7348	item = item->mNext;
michael@0	7349	item->mValue = trackSize;
michael@0	7350	}
michael@0	7351	nsCSSValueList* lastTrackSizeItem = item;
michael@0	7352
michael@0	7353	// [ <line-names>? <track-size> ]+ <line-names>? is now parsed into:
michael@0	7354	// * firstLineNames: the first <line-names>
michael@0	7355	// * a linked list of odd length >= 1, from firstTrackSizeItem
michael@0	7356	// (the first <track-size>) to lastTrackSizeItem (the last),
michael@0	7357	// with the <line-names> sublists in between
michael@0	7358	// * lastLineNames: the last <line-names>
michael@0	7359
michael@0	7360
michael@0	7361	// Join the last and first <line-names> (in that order.)
michael@0	7362	// For example, repeat(3, (a) 100px (b) 200px (c)) results in
michael@0	7363	// (a) 100px (b) 200px (c a) 100px (b) 200px (c a) 100px (b) 200px (c)
michael@0	7364	// This is (c a).
michael@0	7365	// Make deep copies: the originals will be moved.
michael@0	7366	nsCSSValue joinerLineNames;
michael@0	7367	{
michael@0	7368	nsCSSValueList* target = nullptr;
michael@0	7369	if (lastLineNames.GetUnit() != eCSSUnit_Null) {
michael@0	7370	target = joinerLineNames.SetListValue();
michael@0	7371	nsCSSValueList* source = lastLineNames.GetListValue();
michael@0	7372	for (;;) {
michael@0	7373	target->mValue = source->mValue;
michael@0	7374	source = source->mNext;
michael@0	7375	if (!source) {
michael@0	7376	break;
michael@0	7377	}
michael@0	7378	target->mNext = new nsCSSValueList;
michael@0	7379	target = target->mNext;
michael@0	7380	}
michael@0	7381	}
michael@0	7382
michael@0	7383	if (firstLineNames.GetUnit() != eCSSUnit_Null) {
michael@0	7384	if (target) {
michael@0	7385	target->mNext = new nsCSSValueList;
michael@0	7386	target = target->mNext;
michael@0	7387	} else {
michael@0	7388	target = joinerLineNames.SetListValue();
michael@0	7389	}
michael@0	7390	nsCSSValueList* source = firstLineNames.GetListValue();
michael@0	7391	for (;;) {
michael@0	7392	target->mValue = source->mValue;
michael@0	7393	source = source->mNext;
michael@0	7394	if (!source) {
michael@0	7395	break;
michael@0	7396	}
michael@0	7397	target->mNext = new nsCSSValueList;
michael@0	7398	target = target->mNext;
michael@0	7399	}
michael@0	7400	}
michael@0	7401	}
michael@0	7402
michael@0	7403	// Join our first <line-names> with the one before repeat().
michael@0	7404	// (a) repeat(1, (b) 20px) expands to (a b) 20px
michael@0	7405	nsCSSValueList* previousItemBeforeRepeat = *aTailPtr;
michael@0	7406	ConcatLineNames(previousItemBeforeRepeat->mValue, firstLineNames);
michael@0	7407
michael@0	7408	// Move our linked list
michael@0	7409	// (first to last <track-size>, with the <line-names> sublists in between).
michael@0	7410	// This is the first repetition.
michael@0	7411	NS_ASSERTION(previousItemBeforeRepeat->mNext == nullptr,
michael@0	7412	"Expected the end of a linked list");
michael@0	7413	previousItemBeforeRepeat->mNext = firstTrackSizeItemAuto.forget();
michael@0	7414	nsCSSValueList* firstTrackSizeItem = previousItemBeforeRepeat->mNext;
michael@0	7415	nsCSSValueList* tail = lastTrackSizeItem;
michael@0	7416
michael@0	7417	// Repeat |repetitions - 1| more times:
michael@0	7418	// * the joiner <line-names>
michael@0	7419	// * the linked list
michael@0	7420	// (first to last <track-size>, with the <line-names> sublists in between)
michael@0	7421	MOZ_ASSERT(repetitions > 0, "Expected positive repetitions");
michael@0	7422	while (--repetitions) {
michael@0	7423	tail->mNext = new nsCSSValueList;
michael@0	7424	tail = tail->mNext;
michael@0	7425	tail->mValue = joinerLineNames;
michael@0	7426
michael@0	7427	nsCSSValueList* repeatedItem = firstTrackSizeItem;
michael@0	7428	for (;;) {
michael@0	7429	tail->mNext = new nsCSSValueList;
michael@0	7430	tail = tail->mNext;
michael@0	7431	tail->mValue = repeatedItem->mValue;
michael@0	7432	if (repeatedItem == lastTrackSizeItem) {
michael@0	7433	break;
michael@0	7434	}
michael@0	7435	repeatedItem = repeatedItem->mNext;
michael@0	7436	}
michael@0	7437	}
michael@0	7438
michael@0	7439	// Finally, move our last <line-names>.
michael@0	7440	// Any <line-names> immediately after repeat() will append to it.
michael@0	7441	tail->mNext = new nsCSSValueList;
michael@0	7442	tail = tail->mNext;
michael@0	7443	tail->mValue = lastLineNames;
michael@0	7444
michael@0	7445	*aTailPtr = tail;
michael@0	7446	return true;
michael@0	7447	}
michael@0	7448
michael@0	7449	bool
michael@0	7450	CSSParserImpl::ParseGridTemplateColumnsRows(nsCSSProperty aPropID)
michael@0	7451	{
michael@0	7452	nsCSSValue value;
michael@0	7453	if (ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	7454	AppendValue(aPropID, value);
michael@0	7455	return true;
michael@0	7456	}
michael@0	7457
michael@0	7458	nsSubstring* ident = NextIdent();
michael@0	7459	if (ident) {
michael@0	7460	if (ident->LowerCaseEqualsLiteral("subgrid")) {
michael@0	7461	if (!ParseOptionalLineNameListAfterSubgrid(value)) {
michael@0	7462	return false;
michael@0	7463	}
michael@0	7464	AppendValue(aPropID, value);
michael@0	7465	return true;
michael@0	7466	}
michael@0	7467	UngetToken();
michael@0	7468	}
michael@0	7469
michael@0	7470	nsCSSValue firstLineNames;
michael@0	7471	if (ParseGridLineNames(firstLineNames) == CSSParseResult::Error ||
michael@0	7472	!ParseGridTrackListWithFirstLineNames(value, firstLineNames)) {
michael@0	7473	return false;
michael@0	7474	}
michael@0	7475	AppendValue(aPropID, value);
michael@0	7476	return true;
michael@0	7477	}
michael@0	7478
michael@0	7479	bool
michael@0	7480	CSSParserImpl::ParseGridTemplateAreasLine(const nsAutoString& aInput,
michael@0	7481	css::GridTemplateAreasValue* aAreas,
michael@0	7482	nsDataHashtable<nsStringHashKey, uint32_t>& aAreaIndices)
michael@0	7483	{
michael@0	7484	aAreas->mTemplates.AppendElement(mToken.mIdent);
michael@0	7485
michael@0	7486	nsCSSGridTemplateAreaScanner scanner(aInput);
michael@0	7487	nsCSSGridTemplateAreaToken token;
michael@0	7488	css::GridNamedArea* currentArea = nullptr;
michael@0	7489	uint32_t row = aAreas->NRows();
michael@0	7490	uint32_t column;
michael@0	7491	for (column = 1; scanner.Next(token); column++) {
michael@0	7492	if (token.isTrash) {
michael@0	7493	return false;
michael@0	7494	}
michael@0	7495	if (currentArea) {
michael@0	7496	if (token.mName == currentArea->mName) {
michael@0	7497	if (currentArea->mRowStart == row) {
michael@0	7498	// Next column in the first row of this named area.
michael@0	7499	currentArea->mColumnEnd++;
michael@0	7500	}
michael@0	7501	continue;
michael@0	7502	}
michael@0	7503	// We're exiting |currentArea|, so currentArea is ending at |column|.
michael@0	7504	// Make sure that this is consistent with currentArea on previous rows:
michael@0	7505	if (currentArea->mColumnEnd != column) {
michael@0	7506	NS_ASSERTION(currentArea->mRowStart != row,
michael@0	7507	"Inconsistent column end for the first row of a named area.");
michael@0	7508	// Not a rectangle
michael@0	7509	return false;
michael@0	7510	}
michael@0	7511	currentArea = nullptr;
michael@0	7512	}
michael@0	7513	if (!token.mName.IsEmpty()) {
michael@0	7514	// Named cell that doesn't have a cell with the same name on its left.
michael@0	7515
michael@0	7516	// Check if this is the continuation of an existing named area:
michael@0	7517	uint32_t index;
michael@0	7518	if (aAreaIndices.Get(token.mName, &index)) {
michael@0	7519	MOZ_ASSERT(index < aAreas->mNamedAreas.Length(),
michael@0	7520	"Invalid aAreaIndices hash table");
michael@0	7521	currentArea = &aAreas->mNamedAreas[index];
michael@0	7522	if (currentArea->mColumnStart != column ||
michael@0	7523	currentArea->mRowEnd != row) {
michael@0	7524	// Existing named area, but not forming a rectangle
michael@0	7525	return false;
michael@0	7526	}
michael@0	7527	// Next row of an existing named area
michael@0	7528	currentArea->mRowEnd++;
michael@0	7529	} else {
michael@0	7530	// New named area
michael@0	7531	aAreaIndices.Put(token.mName, aAreas->mNamedAreas.Length());
michael@0	7532	currentArea = aAreas->mNamedAreas.AppendElement();
michael@0	7533	currentArea->mName = token.mName;
michael@0	7534	// For column or row N (starting at 1),
michael@0	7535	// the start line is N, the end line is N + 1
michael@0	7536	currentArea->mColumnStart = column;
michael@0	7537	currentArea->mColumnEnd = column + 1;
michael@0	7538	currentArea->mRowStart = row;
michael@0	7539	currentArea->mRowEnd = row + 1;
michael@0	7540	}
michael@0	7541	}
michael@0	7542	}
michael@0	7543	if (currentArea && currentArea->mColumnEnd != column) {
michael@0	7544	NS_ASSERTION(currentArea->mRowStart != row,
michael@0	7545	"Inconsistent column end for the first row of a named area.");
michael@0	7546	// Not a rectangle
michael@0	7547	return false;
michael@0	7548	}
michael@0	7549
michael@0	7550	// On the first row, set the number of columns
michael@0	7551	// that grid-template-areas contributes to the explicit grid.
michael@0	7552	// On other rows, check that the number of columns is consistent
michael@0	7553	// between rows.
michael@0	7554	if (row == 1) {
michael@0	7555	aAreas->mNColumns = column;
michael@0	7556	} else if (aAreas->mNColumns != column) {
michael@0	7557	return false;
michael@0	7558	}
michael@0	7559	return true;
michael@0	7560	}
michael@0	7561
michael@0	7562	bool
michael@0	7563	CSSParserImpl::ParseGridTemplateAreas()
michael@0	7564	{
michael@0	7565	nsCSSValue value;
michael@0	7566	if (ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	7567	AppendValue(eCSSProperty_grid_template_areas, value);
michael@0	7568	return true;
michael@0	7569	}
michael@0	7570
michael@0	7571	nsRefPtr<css::GridTemplateAreasValue> areas =
michael@0	7572	new css::GridTemplateAreasValue();
michael@0	7573	nsDataHashtable<nsStringHashKey, uint32_t> areaIndices;
michael@0	7574	for (;;) {
michael@0	7575	if (!GetToken(true)) {
michael@0	7576	break;
michael@0	7577	}
michael@0	7578	if (eCSSToken_String != mToken.mType) {
michael@0	7579	UngetToken();
michael@0	7580	break;
michael@0	7581	}
michael@0	7582	if (!ParseGridTemplateAreasLine(mToken.mIdent, areas, areaIndices)) {
michael@0	7583	return false;
michael@0	7584	}
michael@0	7585	}
michael@0	7586
michael@0	7587	if (areas->NRows() == 0) {
michael@0	7588	return false;
michael@0	7589	}
michael@0	7590
michael@0	7591	AppendValue(eCSSProperty_grid_template_areas, nsCSSValue(areas));
michael@0	7592	return true;
michael@0	7593	}
michael@0	7594
michael@0	7595	bool
michael@0	7596	CSSParserImpl::ParseGridTemplate()
michael@0	7597	{
michael@0	7598	// none |
michael@0	7599	// subgrid |
michael@0	7600	// <'grid-template-columns'> / <'grid-template-rows'> |
michael@0	7601	// [ <track-list> / ]? [ <line-names>? <string> <track-size>? <line-names>? ]+
michael@0	7602	nsCSSValue value;
michael@0	7603	if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	7604	AppendValue(eCSSProperty_grid_template_areas, value);
michael@0	7605	AppendValue(eCSSProperty_grid_template_columns, value);
michael@0	7606	AppendValue(eCSSProperty_grid_template_rows, value);
michael@0	7607	return true;
michael@0	7608	}
michael@0	7609
michael@0	7610	// TODO (bug 983175): add parsing for 'subgrid' by itself
michael@0	7611
michael@0	7612	// 'none' can appear either by itself,
michael@0	7613	// or as the beginning of <'grid-template-columns'> / <'grid-template-rows'>
michael@0	7614	if (ParseVariant(value, VARIANT_NONE, nullptr)) {
michael@0	7615	AppendValue(eCSSProperty_grid_template_columns, value);
michael@0	7616	if (ExpectSymbol('/', true)) {
michael@0	7617	return ParseGridTemplateAfterSlash(/* aColumnsIsTrackList = */ false);
michael@0	7618	}
michael@0	7619	AppendValue(eCSSProperty_grid_template_areas, value);
michael@0	7620	AppendValue(eCSSProperty_grid_template_rows, value);
michael@0	7621	return true;
michael@0	7622	}
michael@0	7623
michael@0	7624	// 'subgrid' can appear either by itself,
michael@0	7625	// or as the beginning of <'grid-template-columns'> / <'grid-template-rows'>
michael@0	7626	nsSubstring* ident = NextIdent();
michael@0	7627	if (ident) {
michael@0	7628	if (ident->LowerCaseEqualsLiteral("subgrid")) {
michael@0	7629	if (!ParseOptionalLineNameListAfterSubgrid(value)) {
michael@0	7630	return false;
michael@0	7631	}
michael@0	7632	AppendValue(eCSSProperty_grid_template_columns, value);
michael@0	7633	if (ExpectSymbol('/', true)) {
michael@0	7634	return ParseGridTemplateAfterSlash(/* aColumnsIsTrackList = */ false);
michael@0	7635	}
michael@0	7636	if (value.GetListValue()->mNext) {
michael@0	7637	// Non-empty <line-name-list> after 'subgrid'.
michael@0	7638	// This is only valid as part of <'grid-template-columns'>,
michael@0	7639	// which must be followed by a slash.
michael@0	7640	return false;
michael@0	7641	}
michael@0	7642	// 'subgrid' by itself sets both grid-template-columns
michael@0	7643	// and grid-template-rows.
michael@0	7644	AppendValue(eCSSProperty_grid_template_rows, value);
michael@0	7645	value.SetNoneValue();
michael@0	7646	AppendValue(eCSSProperty_grid_template_areas, value);
michael@0	7647	return true;
michael@0	7648	}
michael@0	7649	UngetToken();
michael@0	7650	}
michael@0	7651
michael@0	7652	// [ <line-names>? ] here is ambiguous:
michael@0	7653	// it can be either the start of a <track-list>,
michael@0	7654	// or the start of [ <line-names>? <string> <track-size>? <line-names>? ]+
michael@0	7655	nsCSSValue firstLineNames;
michael@0	7656	if (ParseGridLineNames(firstLineNames) == CSSParseResult::Error ||
michael@0	7657	!GetToken(true)) {
michael@0	7658	return false;
michael@0	7659	}
michael@0	7660	if (mToken.mType == eCSSToken_String) {
michael@0	7661	// [ <track-list> / ]? was omitted
michael@0	7662	// Parse [ <line-names>? <string> <track-size>? <line-names>? ]+
michael@0	7663	value.SetNoneValue();
michael@0	7664	AppendValue(eCSSProperty_grid_template_columns, value);
michael@0	7665	return ParseGridTemplateAfterString(firstLineNames);
michael@0	7666	}
michael@0	7667	UngetToken();
michael@0	7668
michael@0	7669	if (!(ParseGridTrackListWithFirstLineNames(value, firstLineNames) &&
michael@0	7670	ExpectSymbol('/', true))) {
michael@0	7671	return false;
michael@0	7672	}
michael@0	7673	AppendValue(eCSSProperty_grid_template_columns, value);
michael@0	7674	return ParseGridTemplateAfterSlash(/* aColumnsIsTrackList = */ true);
michael@0	7675	}
michael@0	7676
michael@0	7677	// Helper for parsing the 'grid-template' shorthand
michael@0	7678	//
michael@0	7679	// NOTE: This parses the portion after the slash, for *one* of the
michael@0	7680	// following types of expressions:
michael@0	7681	// - <'grid-template-columns'> / <'grid-template-rows'>
michael@0	7682	// - <track-list> / [ <line-names>? <string> <track-size>? <line-names>? ]+
michael@0	7683	//
michael@0	7684	// We don't know which type of expression we've got until we've parsed the
michael@0	7685	// second half, since the pre-slash part is ambiguous. The various return
michael@0	7686	// clauses below are labeled with the type of expression they're completing.
michael@0	7687	bool
michael@0	7688	CSSParserImpl::ParseGridTemplateAfterSlash(bool aColumnsIsTrackList)
michael@0	7689	{
michael@0	7690	nsCSSValue rowsValue;
michael@0	7691	if (ParseVariant(rowsValue, VARIANT_NONE, nullptr)) {
michael@0	7692	// <'grid-template-columns'> / <'grid-template-rows'>
michael@0	7693	AppendValue(eCSSProperty_grid_template_rows, rowsValue);
michael@0	7694	nsCSSValue areasValue(eCSSUnit_None); // implied
michael@0	7695	AppendValue(eCSSProperty_grid_template_areas, areasValue);
michael@0	7696	return true;
michael@0	7697	}
michael@0	7698
michael@0	7699	nsSubstring* ident = NextIdent();
michael@0	7700	if (ident) {
michael@0	7701	if (ident->LowerCaseEqualsLiteral("subgrid")) {
michael@0	7702	if (!ParseOptionalLineNameListAfterSubgrid(rowsValue)) {
michael@0	7703	return false;
michael@0	7704	}
michael@0	7705	// <'grid-template-columns'> / <'grid-template-rows'>
michael@0	7706	AppendValue(eCSSProperty_grid_template_rows, rowsValue);
michael@0	7707	nsCSSValue areasValue(eCSSUnit_None); // implied
michael@0	7708	AppendValue(eCSSProperty_grid_template_areas, areasValue);
michael@0	7709	return true;
michael@0	7710	}
michael@0	7711	UngetToken();
michael@0	7712	}
michael@0	7713
michael@0	7714	nsCSSValue firstLineNames;
michael@0	7715	if (ParseGridLineNames(firstLineNames) == CSSParseResult::Error ||
michael@0	7716	!GetToken(true)) {
michael@0	7717	return false;
michael@0	7718	}
michael@0	7719	if (aColumnsIsTrackList && mToken.mType == eCSSToken_String) {
michael@0	7720	// [ <track-list> / ]? [ <line-names>? <string> <track-size>? <line-names>? ]+
michael@0	7721	return ParseGridTemplateAfterString(firstLineNames);
michael@0	7722	}
michael@0	7723	UngetToken();
michael@0	7724
michael@0	7725	if (!ParseGridTrackListWithFirstLineNames(rowsValue, firstLineNames)) {
michael@0	7726	return false;
michael@0	7727	}
michael@0	7728
michael@0	7729	// <'grid-template-columns'> / <'grid-template-rows'>
michael@0	7730	AppendValue(eCSSProperty_grid_template_rows, rowsValue);
michael@0	7731	nsCSSValue areasValue(eCSSUnit_None); // implied
michael@0	7732	AppendValue(eCSSProperty_grid_template_areas, areasValue);
michael@0	7733	return true;
michael@0	7734	}
michael@0	7735
michael@0	7736	// Helper for parsing the 'grid-template' shorthand:
michael@0	7737	// Parse [ <line-names>? <string> <track-size>? <line-names>? ]+
michael@0	7738	// with a <line-names>? already consumed, stored in |aFirstLineNames|,
michael@0	7739	// and the current token a <string>
michael@0	7740	bool
michael@0	7741	CSSParserImpl::ParseGridTemplateAfterString(const nsCSSValue& aFirstLineNames)
michael@0	7742	{
michael@0	7743	MOZ_ASSERT(mToken.mType == eCSSToken_String,
michael@0	7744	"ParseGridTemplateAfterString called with a non-string token");
michael@0	7745
michael@0	7746	nsCSSValue rowsValue;
michael@0	7747	nsRefPtr<css::GridTemplateAreasValue> areas =
michael@0	7748	new css::GridTemplateAreasValue();
michael@0	7749	nsDataHashtable<nsStringHashKey, uint32_t> areaIndices;
michael@0	7750	nsCSSValueList* rowsItem = rowsValue.SetListValue();
michael@0	7751	rowsItem->mValue = aFirstLineNames;
michael@0	7752
michael@0	7753	for (;;) {
michael@0	7754	if (!ParseGridTemplateAreasLine(mToken.mIdent, areas, areaIndices)) {
michael@0	7755	return false;
michael@0	7756	}
michael@0	7757
michael@0	7758	rowsItem->mNext = new nsCSSValueList;
michael@0	7759	rowsItem = rowsItem->mNext;
michael@0	7760	CSSParseResult result = ParseGridTrackSize(rowsItem->mValue);
michael@0	7761	if (result == CSSParseResult::Error) {
michael@0	7762	return false;
michael@0	7763	}
michael@0	7764	if (result == CSSParseResult::NotFound) {
michael@0	7765	rowsItem->mValue.SetAutoValue();
michael@0	7766	}
michael@0	7767
michael@0	7768	rowsItem->mNext = new nsCSSValueList;
michael@0	7769	rowsItem = rowsItem->mNext;
michael@0	7770	result = ParseGridLineNames(rowsItem->mValue);
michael@0	7771	if (result == CSSParseResult::Error) {
michael@0	7772	return false;
michael@0	7773	}
michael@0	7774	if (result == CSSParseResult::Ok) {
michael@0	7775	// Append to the same list as the previous call to ParseGridLineNames.
michael@0	7776	result = ParseGridLineNames(rowsItem->mValue);
michael@0	7777	if (result == CSSParseResult::Error) {
michael@0	7778	return false;
michael@0	7779	}
michael@0	7780	if (result == CSSParseResult::Ok) {
michael@0	7781	// Parsed <line-name> twice.
michael@0	7782	// The property value can not end here, we expect a string next.
michael@0	7783	if (!GetToken(true)) {
michael@0	7784	return false;
michael@0	7785	}
michael@0	7786	if (eCSSToken_String != mToken.mType) {
michael@0	7787	UngetToken();
michael@0	7788	return false;
michael@0	7789	}
michael@0	7790	continue;
michael@0	7791	}
michael@0	7792	}
michael@0	7793
michael@0	7794	// Did not find a <line-names>.
michael@0	7795	// Next, we expect either a string or the end of the property value.
michael@0	7796	if (!GetToken(true)) {
michael@0	7797	break;
michael@0	7798	}
michael@0	7799	if (eCSSToken_String != mToken.mType) {
michael@0	7800	UngetToken();
michael@0	7801	break;
michael@0	7802	}
michael@0	7803	}
michael@0	7804
michael@0	7805	AppendValue(eCSSProperty_grid_template_areas, nsCSSValue(areas));
michael@0	7806	AppendValue(eCSSProperty_grid_template_rows, rowsValue);
michael@0	7807	return true;
michael@0	7808	}
michael@0	7809
michael@0	7810	// <'grid-template'> |
michael@0	7811	// [ <'grid-auto-flow'> [ <'grid-auto-columns'> [ / <'grid-auto-rows'> ]? ]? ]
michael@0	7812	bool
michael@0	7813	CSSParserImpl::ParseGrid()
michael@0	7814	{
michael@0	7815	nsCSSValue value;
michael@0	7816	if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	7817	for (const nsCSSProperty* subprops =
michael@0	7818	nsCSSProps::SubpropertyEntryFor(eCSSProperty_grid);
michael@0	7819	*subprops != eCSSProperty_UNKNOWN; ++subprops) {
michael@0	7820	AppendValue(*subprops, value);
michael@0	7821	}
michael@0	7822	return true;
michael@0	7823	}
michael@0	7824
michael@0	7825	// 'none' at the beginning could be a <'grid-auto-flow'>
michael@0	7826	// (which also covers 'none' by itself)
michael@0	7827	// or a <'grid-template-columns'> (as part of <'grid-template'>)
michael@0	7828	if (ParseVariant(value, VARIANT_NONE, nullptr)) {
michael@0	7829	if (ExpectSymbol('/', true)) {
michael@0	7830	AppendValue(eCSSProperty_grid_template_columns, value);
michael@0	7831
michael@0	7832	// Set grid-auto-* subproperties to their initial values.
michael@0	7833	value.SetIntValue(NS_STYLE_GRID_AUTO_FLOW_NONE, eCSSUnit_Enumerated);
michael@0	7834	AppendValue(eCSSProperty_grid_auto_flow, value);
michael@0	7835	value.SetAutoValue();
michael@0	7836	AppendValue(eCSSProperty_grid_auto_columns, value);
michael@0	7837	AppendValue(eCSSProperty_grid_auto_rows, value);
michael@0	7838
michael@0	7839	return ParseGridTemplateAfterSlash(/* aColumnsIsTrackList = */ false);
michael@0	7840	}
michael@0	7841	value.SetIntValue(NS_STYLE_GRID_AUTO_FLOW_NONE, eCSSUnit_Enumerated);
michael@0	7842	AppendValue(eCSSProperty_grid_auto_flow, value);
michael@0	7843	return ParseGridShorthandAutoProps();
michael@0	7844	}
michael@0	7845
michael@0	7846	// An empty value is always invalid.
michael@0	7847	if (!GetToken(true)) {
michael@0	7848	return false;
michael@0	7849	}
michael@0	7850
michael@0	7851	// If the value starts with a 'dense', 'column' or 'row' keyword,
michael@0	7852	// it can only start with a <'grid-auto-flow'>
michael@0	7853	if (mToken.mType == eCSSToken_Ident) {
michael@0	7854	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
michael@0	7855	if (keyword == eCSSKeyword_dense ||
michael@0	7856	keyword == eCSSKeyword_column ||
michael@0	7857	keyword == eCSSKeyword_row) {
michael@0	7858	UngetToken();
michael@0	7859	return ParseGridAutoFlow() && ParseGridShorthandAutoProps();
michael@0	7860	}
michael@0	7861	}
michael@0	7862	UngetToken();
michael@0	7863
michael@0	7864	// Set other subproperties to their initial values
michael@0	7865	// and parse <'grid-template'>.
michael@0	7866	value.SetIntValue(NS_STYLE_GRID_AUTO_FLOW_NONE, eCSSUnit_Enumerated);
michael@0	7867	AppendValue(eCSSProperty_grid_auto_flow, value);
michael@0	7868	value.SetAutoValue();
michael@0	7869	AppendValue(eCSSProperty_grid_auto_columns, value);
michael@0	7870	AppendValue(eCSSProperty_grid_auto_rows, value);
michael@0	7871	return ParseGridTemplate();
michael@0	7872	}
michael@0	7873
michael@0	7874	// Parse [ <'grid-auto-columns'> [ / <'grid-auto-rows'> ]? ]?
michael@0	7875	// for the 'grid' shorthand.
michael@0	7876	// Assumes that <'grid-auto-flow'> was already parsed by the caller.
michael@0	7877	bool
michael@0	7878	CSSParserImpl::ParseGridShorthandAutoProps()
michael@0	7879	{
michael@0	7880	nsCSSValue autoColumnsValue;
michael@0	7881	nsCSSValue autoRowsValue;
michael@0	7882	CSSParseResult result = ParseGridTrackSize(autoColumnsValue);
michael@0	7883	if (result == CSSParseResult::Error) {
michael@0	7884	return false;
michael@0	7885	}
michael@0	7886	if (result == CSSParseResult::NotFound) {
michael@0	7887	autoColumnsValue.SetAutoValue();
michael@0	7888	autoRowsValue.SetAutoValue();
michael@0	7889	} else {
michael@0	7890	if (!ExpectSymbol('/', true)) {
michael@0	7891	autoRowsValue.SetAutoValue();
michael@0	7892	} else if (ParseGridTrackSize(autoRowsValue) != CSSParseResult::Ok) {
michael@0	7893	return false;
michael@0	7894	}
michael@0	7895	}
michael@0	7896	AppendValue(eCSSProperty_grid_auto_columns, autoColumnsValue);
michael@0	7897	AppendValue(eCSSProperty_grid_auto_rows, autoRowsValue);
michael@0	7898	nsCSSValue templateValue(eCSSUnit_None); // Initial values
michael@0	7899	AppendValue(eCSSProperty_grid_template_areas, templateValue);
michael@0	7900	AppendValue(eCSSProperty_grid_template_columns, templateValue);
michael@0	7901	AppendValue(eCSSProperty_grid_template_rows, templateValue);
michael@0	7902	return true;
michael@0	7903	}
michael@0	7904
michael@0	7905	// Parse a <grid-line>.
michael@0	7906	// If successful, set aValue to eCSSUnit_Auto,
michael@0	7907	// or a eCSSUnit_List containing, in that order:
michael@0	7908	//
michael@0	7909	// * An optional eCSSUnit_Enumerated marking a "span" keyword.
michael@0	7910	// * An optional eCSSUnit_Integer
michael@0	7911	// * An optional eCSSUnit_Ident
michael@0	7912	//
michael@0	7913	// At least one of eCSSUnit_Integer or eCSSUnit_Ident is present.
michael@0	7914	bool
michael@0	7915	CSSParserImpl::ParseGridLine(nsCSSValue& aValue)
michael@0	7916	{
michael@0	7917	// <grid-line> =
michael@0	7918	// auto |
michael@0	7919	// <custom-ident> |
michael@0	7920	// [ <integer> && <custom-ident>? ] |
michael@0	7921	// [ span && [ <integer> || <custom-ident> ] ]
michael@0	7922	//
michael@0	7923	// Syntactically, this simplifies to:
michael@0	7924	//
michael@0	7925	// <grid-line> =
michael@0	7926	// auto |
michael@0	7927	// [ span? && [ <integer> || <custom-ident> ] ]
michael@0	7928
michael@0	7929	if (ParseVariant(aValue, VARIANT_AUTO, nullptr)) {
michael@0	7930	return true;
michael@0	7931	}
michael@0	7932
michael@0	7933	static const nsCSSKeyword kGridLineKeywords[] = {
michael@0	7934	eCSSKeyword_span,
michael@0	7935	eCSSKeyword_UNKNOWN // End-of-array marker
michael@0	7936	};
michael@0	7937	bool hasSpan = false;
michael@0	7938	bool hasInteger = false;
michael@0	7939	bool hasIdent = false;
michael@0	7940	int32_t integer;
michael@0	7941	nsCSSValue ident;
michael@0	7942
michael@0	7943	if (!GetToken(true)) {
michael@0	7944	return false;
michael@0	7945	}
michael@0	7946	if (mToken.mType == eCSSToken_Ident &&
michael@0	7947	mToken.mIdent.LowerCaseEqualsLiteral("span")) {
michael@0	7948	hasSpan = true;
michael@0	7949	if (!GetToken(true)) {
michael@0	7950	return false;
michael@0	7951	}
michael@0	7952	}
michael@0	7953
michael@0	7954	do {
michael@0	7955	if (!hasIdent &&
michael@0	7956	mToken.mType == eCSSToken_Ident &&
michael@0	7957	ParseCustomIdent(ident, mToken.mIdent, kGridLineKeywords)) {
michael@0	7958	hasIdent = true;
michael@0	7959	} else if (!hasInteger &&
michael@0	7960	mToken.mType == eCSSToken_Number &&
michael@0	7961	mToken.mIntegerValid &&
michael@0	7962	mToken.mInteger != 0) {
michael@0	7963	hasInteger = true;
michael@0	7964	integer = mToken.mInteger;
michael@0	7965	} else {
michael@0	7966	UngetToken();
michael@0	7967	break;
michael@0	7968	}
michael@0	7969	} while (!(hasInteger && hasIdent) && GetToken(true));
michael@0	7970
michael@0	7971	// Require at least one of <integer> or <custom-ident>
michael@0	7972	if (!(hasInteger || hasIdent)) {
michael@0	7973	return false;
michael@0	7974	}
michael@0	7975
michael@0	7976	if (!hasSpan && GetToken(true)) {
michael@0	7977	if (mToken.mType == eCSSToken_Ident &&
michael@0	7978	mToken.mIdent.LowerCaseEqualsLiteral("span")) {
michael@0	7979	hasSpan = true;
michael@0	7980	} else {
michael@0	7981	UngetToken();
michael@0	7982	}
michael@0	7983	}
michael@0	7984
michael@0	7985	nsCSSValueList* item = aValue.SetListValue();
michael@0	7986	if (hasSpan) {
michael@0	7987	// Given "span", a negative <integer> is invalid.
michael@0	7988	if (hasInteger && integer < 0) {
michael@0	7989	return false;
michael@0	7990	}
michael@0	7991	// '1' here is a dummy value.
michael@0	7992	// The mere presence of eCSSUnit_Enumerated indicates a "span" keyword.
michael@0	7993	item->mValue.SetIntValue(1, eCSSUnit_Enumerated);
michael@0	7994	item->mNext = new nsCSSValueList;
michael@0	7995	item = item->mNext;
michael@0	7996	}
michael@0	7997	if (hasInteger) {
michael@0	7998	item->mValue.SetIntValue(integer, eCSSUnit_Integer);
michael@0	7999	if (hasIdent) {
michael@0	8000	item->mNext = new nsCSSValueList;
michael@0	8001	item = item->mNext;
michael@0	8002	}
michael@0	8003	}
michael@0	8004	if (hasIdent) {
michael@0	8005	item->mValue = ident;
michael@0	8006	}
michael@0	8007	return true;
michael@0	8008	}
michael@0	8009
michael@0	8010	bool
michael@0	8011	CSSParserImpl::ParseGridAutoPosition()
michael@0	8012	{
michael@0	8013	nsCSSValue value;
michael@0	8014	if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	8015	AppendValue(eCSSProperty_grid_auto_position, value);
michael@0	8016	return true;
michael@0	8017	}
michael@0	8018	nsCSSValue columnStartValue;
michael@0	8019	nsCSSValue rowStartValue;
michael@0	8020	if (ParseGridLine(columnStartValue) &&
michael@0	8021	ExpectSymbol('/', true) &&
michael@0	8022	ParseGridLine(rowStartValue)) {
michael@0	8023	value.SetPairValue(columnStartValue, rowStartValue);
michael@0	8024	AppendValue(eCSSProperty_grid_auto_position, value);
michael@0	8025	return true;
michael@0	8026	}
michael@0	8027	return false;
michael@0	8028	}
michael@0	8029
michael@0	8030	bool
michael@0	8031	CSSParserImpl::ParseGridColumnRowStartEnd(nsCSSProperty aPropID)
michael@0	8032	{
michael@0	8033	nsCSSValue value;
michael@0	8034	if (ParseVariant(value, VARIANT_INHERIT, nullptr) ||
michael@0	8035	ParseGridLine(value)) {
michael@0	8036	AppendValue(aPropID, value);
michael@0	8037	return true;
michael@0	8038	}
michael@0	8039	return false;
michael@0	8040	}
michael@0	8041
michael@0	8042	// If |aFallback| is a List containing a single Ident, set |aValue| to that.
michael@0	8043	// Otherwise, set |aValue| to Auto.
michael@0	8044	// Used with |aFallback| from ParseGridLine()
michael@0	8045	static void
michael@0	8046	HandleGridLineFallback(const nsCSSValue& aFallback, nsCSSValue& aValue)
michael@0	8047	{
michael@0	8048	if (aFallback.GetUnit() == eCSSUnit_List &&
michael@0	8049	aFallback.GetListValue()->mValue.GetUnit() == eCSSUnit_Ident &&
michael@0	8050	!aFallback.GetListValue()->mNext) {
michael@0	8051	aValue = aFallback;
michael@0	8052	} else {
michael@0	8053	aValue.SetAutoValue();
michael@0	8054	}
michael@0	8055	}
michael@0	8056
michael@0	8057	bool
michael@0	8058	CSSParserImpl::ParseGridColumnRow(nsCSSProperty aStartPropID,
michael@0	8059	nsCSSProperty aEndPropID)
michael@0	8060	{
michael@0	8061	nsCSSValue value;
michael@0	8062	nsCSSValue secondValue;
michael@0	8063	if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	8064	AppendValue(aStartPropID, value);
michael@0	8065	AppendValue(aEndPropID, value);
michael@0	8066	return true;
michael@0	8067	}
michael@0	8068
michael@0	8069	if (!ParseGridLine(value)) {
michael@0	8070	return false;
michael@0	8071	}
michael@0	8072	if (GetToken(true)) {
michael@0	8073	if (mToken.IsSymbol('/')) {
michael@0	8074	if (ParseGridLine(secondValue)) {
michael@0	8075	AppendValue(aStartPropID, value);
michael@0	8076	AppendValue(aEndPropID, secondValue);
michael@0	8077	return true;
michael@0	8078	} else {
michael@0	8079	return false;
michael@0	8080	}
michael@0	8081	}
michael@0	8082	UngetToken();
michael@0	8083	}
michael@0	8084
michael@0	8085	// A single <custom-ident> is repeated to both properties,
michael@0	8086	// anything else sets the grid-{column,row}-end property to 'auto'.
michael@0	8087	HandleGridLineFallback(value, secondValue);
michael@0	8088
michael@0	8089	AppendValue(aStartPropID, value);
michael@0	8090	AppendValue(aEndPropID, secondValue);
michael@0	8091	return true;
michael@0	8092	}
michael@0	8093
michael@0	8094	bool
michael@0	8095	CSSParserImpl::ParseGridArea()
michael@0	8096	{
michael@0	8097	nsCSSValue values[4];
michael@0	8098	if (ParseVariant(values[0], VARIANT_INHERIT, nullptr)) {
michael@0	8099	AppendValue(eCSSProperty_grid_row_start, values[0]);
michael@0	8100	AppendValue(eCSSProperty_grid_column_start, values[0]);
michael@0	8101	AppendValue(eCSSProperty_grid_row_end, values[0]);
michael@0	8102	AppendValue(eCSSProperty_grid_column_end, values[0]);
michael@0	8103	return true;
michael@0	8104	}
michael@0	8105
michael@0	8106	int32_t i = 0;
michael@0	8107	for (;;) {
michael@0	8108	if (!ParseGridLine(values[i])) {
michael@0	8109	return false;
michael@0	8110	}
michael@0	8111	if (++i == 4 || !GetToken(true)) {
michael@0	8112	break;
michael@0	8113	}
michael@0	8114	if (!mToken.IsSymbol('/')) {
michael@0	8115	UngetToken();
michael@0	8116	break;
michael@0	8117	}
michael@0	8118	}
michael@0	8119
michael@0	8120	MOZ_ASSERT(i >= 1, "should have parsed at least one grid-line (or returned)");
michael@0	8121	if (i < 2) {
michael@0	8122	HandleGridLineFallback(values[0], values[1]);
michael@0	8123	}
michael@0	8124	if (i < 3) {
michael@0	8125	HandleGridLineFallback(values[0], values[2]);
michael@0	8126	}
michael@0	8127	if (i < 4) {
michael@0	8128	HandleGridLineFallback(values[1], values[3]);
michael@0	8129	}
michael@0	8130
michael@0	8131	AppendValue(eCSSProperty_grid_row_start, values[0]);
michael@0	8132	AppendValue(eCSSProperty_grid_column_start, values[1]);
michael@0	8133	AppendValue(eCSSProperty_grid_row_end, values[2]);
michael@0	8134	AppendValue(eCSSProperty_grid_column_end, values[3]);
michael@0	8135	return true;
michael@0	8136	}
michael@0	8137
michael@0	8138	// <color-stop> : <color> [ <percentage> | <length> ]?
michael@0	8139	bool
michael@0	8140	CSSParserImpl::ParseColorStop(nsCSSValueGradient* aGradient)
michael@0	8141	{
michael@0	8142	nsCSSValueGradientStop* stop = aGradient->mStops.AppendElement();
michael@0	8143	if (!ParseVariant(stop->mColor, VARIANT_COLOR, nullptr)) {
michael@0	8144	return false;
michael@0	8145	}
michael@0	8146
michael@0	8147	// Stop positions do not have to fall between the starting-point and
michael@0	8148	// ending-point, so we don't use ParseNonNegativeVariant.
michael@0	8149	if (!ParseVariant(stop->mLocation, VARIANT_LP | VARIANT_CALC, nullptr)) {
michael@0	8150	stop->mLocation.SetNoneValue();
michael@0	8151	}
michael@0	8152	return true;
michael@0	8153	}
michael@0	8154
michael@0	8155	// <gradient>
michael@0	8156	// : linear-gradient( <linear-gradient-line>? <color-stops> ')'
michael@0	8157	// | radial-gradient( <radial-gradient-line>? <color-stops> ')'
michael@0	8158	//
michael@0	8159	// <linear-gradient-line> : [ to [left | right] || [top | bottom] ] ,
michael@0	8160	// | <legacy-gradient-line>
michael@0	8161	// <radial-gradient-line> : [ <shape> || <size> ] [ at <position> ]? ,
michael@0	8162	// | [ at <position> ] ,
michael@0	8163	// | <legacy-gradient-line>? <legacy-shape-size>?
michael@0	8164	// <shape> : circle | ellipse
michael@0	8165	// <size> : closest-side | closest-corner | farthest-side | farthest-corner
michael@0	8166	// | <length> | [<length> | <percentage>]{2}
michael@0	8167	//
michael@0	8168	// <legacy-gradient-line> : [ <position> || <angle>] ,
michael@0	8169	//
michael@0	8170	// <legacy-shape-size> : [ <shape> || <legacy-size> ] ,
michael@0	8171	// <legacy-size> : closest-side | closest-corner | farthest-side
michael@0	8172	// | farthest-corner | contain | cover
michael@0	8173	//
michael@0	8174	// <color-stops> : <color-stop> , <color-stop> [, <color-stop>]*
michael@0	8175	bool
michael@0	8176	CSSParserImpl::ParseLinearGradient(nsCSSValue& aValue, bool aIsRepeating,
michael@0	8177	bool aIsLegacy)
michael@0	8178	{
michael@0	8179	nsRefPtr<nsCSSValueGradient> cssGradient
michael@0	8180	= new nsCSSValueGradient(false, aIsRepeating);
michael@0	8181
michael@0	8182	if (!GetToken(true)) {
michael@0	8183	return false;
michael@0	8184	}
michael@0	8185
michael@0	8186	if (mToken.mType == eCSSToken_Ident &&
michael@0	8187	mToken.mIdent.LowerCaseEqualsLiteral("to")) {
michael@0	8188
michael@0	8189	// "to" syntax doesn't allow explicit "center"
michael@0	8190	if (!ParseBoxPositionValues(cssGradient->mBgPos, false, false)) {
michael@0	8191	SkipUntil(')');
michael@0	8192	return false;
michael@0	8193	}
michael@0	8194
michael@0	8195	// [ to [left | right] || [top | bottom] ] ,
michael@0	8196	const nsCSSValue& xValue = cssGradient->mBgPos.mXValue;
michael@0	8197	const nsCSSValue& yValue = cssGradient->mBgPos.mYValue;
michael@0	8198	if (xValue.GetUnit() != eCSSUnit_Enumerated ||
michael@0	8199	!(xValue.GetIntValue() & (NS_STYLE_BG_POSITION_LEFT |
michael@0	8200	NS_STYLE_BG_POSITION_CENTER |
michael@0	8201	NS_STYLE_BG_POSITION_RIGHT)) ||
michael@0	8202	yValue.GetUnit() != eCSSUnit_Enumerated ||
michael@0	8203	!(yValue.GetIntValue() & (NS_STYLE_BG_POSITION_TOP |
michael@0	8204	NS_STYLE_BG_POSITION_CENTER |
michael@0	8205	NS_STYLE_BG_POSITION_BOTTOM))) {
michael@0	8206	SkipUntil(')');
michael@0	8207	return false;
michael@0	8208	}
michael@0	8209
michael@0	8210	if (!ExpectSymbol(',', true)) {
michael@0	8211	SkipUntil(')');
michael@0	8212	return false;
michael@0	8213	}
michael@0	8214
michael@0	8215	return ParseGradientColorStops(cssGradient, aValue);
michael@0	8216	}
michael@0	8217
michael@0	8218	if (!aIsLegacy) {
michael@0	8219	UngetToken();
michael@0	8220
michael@0	8221	// <angle> ,
michael@0	8222	if (ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr) &&
michael@0	8223	!ExpectSymbol(',', true)) {
michael@0	8224	SkipUntil(')');
michael@0	8225	return false;
michael@0	8226	}
michael@0	8227
michael@0	8228	return ParseGradientColorStops(cssGradient, aValue);
michael@0	8229	}
michael@0	8230
michael@0	8231	nsCSSTokenType ty = mToken.mType;
michael@0	8232	nsString id = mToken.mIdent;
michael@0	8233	UngetToken();
michael@0	8234
michael@0	8235	// <legacy-gradient-line>
michael@0	8236	bool haveGradientLine = IsLegacyGradientLine(ty, id);
michael@0	8237	if (haveGradientLine) {
michael@0	8238	cssGradient->mIsLegacySyntax = true;
michael@0	8239	bool haveAngle =
michael@0	8240	ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr);
michael@0	8241
michael@0	8242	// if we got an angle, we might now have a comma, ending the gradient-line
michael@0	8243	if (!haveAngle || !ExpectSymbol(',', true)) {
michael@0	8244	if (!ParseBoxPositionValues(cssGradient->mBgPos, false)) {
michael@0	8245	SkipUntil(')');
michael@0	8246	return false;
michael@0	8247	}
michael@0	8248
michael@0	8249	if (!ExpectSymbol(',', true) &&
michael@0	8250	// if we didn't already get an angle, we might have one now,
michael@0	8251	// otherwise it's an error
michael@0	8252	(haveAngle ||
michael@0	8253	!ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr) ||
michael@0	8254	// now we better have a comma
michael@0	8255	!ExpectSymbol(',', true))) {
michael@0	8256	SkipUntil(')');
michael@0	8257	return false;
michael@0	8258	}
michael@0	8259	}
michael@0	8260	}
michael@0	8261
michael@0	8262	return ParseGradientColorStops(cssGradient, aValue);
michael@0	8263	}
michael@0	8264
michael@0	8265	bool
michael@0	8266	CSSParserImpl::ParseRadialGradient(nsCSSValue& aValue, bool aIsRepeating,
michael@0	8267	bool aIsLegacy)
michael@0	8268	{
michael@0	8269	nsRefPtr<nsCSSValueGradient> cssGradient
michael@0	8270	= new nsCSSValueGradient(true, aIsRepeating);
michael@0	8271
michael@0	8272	// [ <shape> || <size> ]
michael@0	8273	bool haveShape =
michael@0	8274	ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
michael@0	8275	nsCSSProps::kRadialGradientShapeKTable);
michael@0	8276
michael@0	8277	bool haveSize = ParseVariant(cssGradient->GetRadialSize(), VARIANT_KEYWORD,
michael@0	8278	aIsLegacy ?
michael@0	8279	nsCSSProps::kRadialGradientLegacySizeKTable :
michael@0	8280	nsCSSProps::kRadialGradientSizeKTable);
michael@0	8281	if (haveSize) {
michael@0	8282	if (!haveShape) {
michael@0	8283	// <size> <shape>
michael@0	8284	haveShape = ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
michael@0	8285	nsCSSProps::kRadialGradientShapeKTable);
michael@0	8286	}
michael@0	8287	} else if (!aIsLegacy) {
michael@0	8288	// Save RadialShape before parsing RadiusX because RadialShape and
michael@0	8289	// RadiusX share the storage.
michael@0	8290	int32_t shape =
michael@0	8291	cssGradient->GetRadialShape().GetUnit() == eCSSUnit_Enumerated ?
michael@0	8292	cssGradient->GetRadialShape().GetIntValue() : -1;
michael@0	8293	// <length> | [<length> | <percentage>]{2}
michael@0	8294	cssGradient->mIsExplicitSize = true;
michael@0	8295	haveSize =
michael@0	8296	ParseNonNegativeVariant(cssGradient->GetRadiusX(), VARIANT_LP, nullptr);
michael@0	8297	if (!haveSize) {
michael@0	8298	// It was not an explicit size after all.
michael@0	8299	// Note that ParseNonNegativeVariant may have put something
michael@0	8300	// invalid into our storage, but only in the case where it was
michael@0	8301	// rejected only for being negative. Since this means the token
michael@0	8302	// was a length or a percentage, we know it's not valid syntax
michael@0	8303	// (which must be a comma, the 'at' keyword, or a color), so we
michael@0	8304	// know this value will be dropped. This means it doesn't matter
michael@0	8305	// that we have something invalid in our storage.
michael@0	8306	cssGradient->mIsExplicitSize = false;
michael@0	8307	} else {
michael@0	8308	// vertical extent is optional
michael@0	8309	bool haveYSize =
michael@0	8310	ParseNonNegativeVariant(cssGradient->GetRadiusY(), VARIANT_LP, nullptr);
michael@0	8311	if (!haveShape) {
michael@0	8312	nsCSSValue shapeValue;
michael@0	8313	haveShape = ParseVariant(shapeValue, VARIANT_KEYWORD,
michael@0	8314	nsCSSProps::kRadialGradientShapeKTable);
michael@0	8315	if (haveShape) {
michael@0	8316	shape = shapeValue.GetIntValue();
michael@0	8317	}
michael@0	8318	}
michael@0	8319	if (haveYSize
michael@0	8320	? shape == NS_STYLE_GRADIENT_SHAPE_CIRCULAR
michael@0	8321	: cssGradient->GetRadiusX().GetUnit() == eCSSUnit_Percent ||
michael@0	8322	shape == NS_STYLE_GRADIENT_SHAPE_ELLIPTICAL) {
michael@0	8323	SkipUntil(')');
michael@0	8324	return false;
michael@0	8325	}
michael@0	8326	}
michael@0	8327	}
michael@0	8328
michael@0	8329	if ((haveShape || haveSize) && ExpectSymbol(',', true)) {
michael@0	8330	// [ <shape> || <size> ] ,
michael@0	8331	return ParseGradientColorStops(cssGradient, aValue);
michael@0	8332	}
michael@0	8333
michael@0	8334	if (!GetToken(true)) {
michael@0	8335	return false;
michael@0	8336	}
michael@0	8337
michael@0	8338	if (!aIsLegacy) {
michael@0	8339	if (mToken.mType == eCSSToken_Ident &&
michael@0	8340	mToken.mIdent.LowerCaseEqualsLiteral("at")) {
michael@0	8341	// [ <shape> || <size> ]? at <position> ,
michael@0	8342	if (!ParseBoxPositionValues(cssGradient->mBgPos, false) ||
michael@0	8343	!ExpectSymbol(',', true)) {
michael@0	8344	SkipUntil(')');
michael@0	8345	return false;
michael@0	8346	}
michael@0	8347
michael@0	8348	return ParseGradientColorStops(cssGradient, aValue);
michael@0	8349	}
michael@0	8350
michael@0	8351	// <color-stops> only
michael@0	8352	UngetToken();
michael@0	8353	return ParseGradientColorStops(cssGradient, aValue);
michael@0	8354	}
michael@0	8355	MOZ_ASSERT(!cssGradient->mIsExplicitSize);
michael@0	8356
michael@0	8357	nsCSSTokenType ty = mToken.mType;
michael@0	8358	nsString id = mToken.mIdent;
michael@0	8359	UngetToken();
michael@0	8360
michael@0	8361	// <legacy-gradient-line>
michael@0	8362	bool haveGradientLine = false;
michael@0	8363	// if we already encountered a shape or size,
michael@0	8364	// we can not have a gradient-line in legacy syntax
michael@0	8365	if (!haveShape && !haveSize) {
michael@0	8366	haveGradientLine = IsLegacyGradientLine(ty, id);
michael@0	8367	}
michael@0	8368	if (haveGradientLine) {
michael@0	8369	bool haveAngle =
michael@0	8370	ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr);
michael@0	8371
michael@0	8372	// if we got an angle, we might now have a comma, ending the gradient-line
michael@0	8373	if (!haveAngle || !ExpectSymbol(',', true)) {
michael@0	8374	if (!ParseBoxPositionValues(cssGradient->mBgPos, false)) {
michael@0	8375	SkipUntil(')');
michael@0	8376	return false;
michael@0	8377	}
michael@0	8378
michael@0	8379	if (!ExpectSymbol(',', true) &&
michael@0	8380	// if we didn't already get an angle, we might have one now,
michael@0	8381	// otherwise it's an error
michael@0	8382	(haveAngle ||
michael@0	8383	!ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr) ||
michael@0	8384	// now we better have a comma
michael@0	8385	!ExpectSymbol(',', true))) {
michael@0	8386	SkipUntil(')');
michael@0	8387	return false;
michael@0	8388	}
michael@0	8389	}
michael@0	8390
michael@0	8391	if (cssGradient->mAngle.GetUnit() != eCSSUnit_None) {
michael@0	8392	cssGradient->mIsLegacySyntax = true;
michael@0	8393	}
michael@0	8394	}
michael@0	8395
michael@0	8396	// radial gradients might have a shape and size here for legacy syntax
michael@0	8397	if (!haveShape && !haveSize) {
michael@0	8398	haveShape =
michael@0	8399	ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
michael@0	8400	nsCSSProps::kRadialGradientShapeKTable);
michael@0	8401	haveSize =
michael@0	8402	ParseVariant(cssGradient->GetRadialSize(), VARIANT_KEYWORD,
michael@0	8403	nsCSSProps::kRadialGradientLegacySizeKTable);
michael@0	8404
michael@0	8405	// could be in either order
michael@0	8406	if (!haveShape) {
michael@0	8407	haveShape =
michael@0	8408	ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
michael@0	8409	nsCSSProps::kRadialGradientShapeKTable);
michael@0	8410	}
michael@0	8411	}
michael@0	8412
michael@0	8413	if ((haveShape || haveSize) && !ExpectSymbol(',', true)) {
michael@0	8414	SkipUntil(')');
michael@0	8415	return false;
michael@0	8416	}
michael@0	8417
michael@0	8418	return ParseGradientColorStops(cssGradient, aValue);
michael@0	8419	}
michael@0	8420
michael@0	8421	bool
michael@0	8422	CSSParserImpl::IsLegacyGradientLine(const nsCSSTokenType& aType,
michael@0	8423	const nsString& aId)
michael@0	8424	{
michael@0	8425	// N.B. ParseBoxPositionValues is not guaranteed to put back
michael@0	8426	// everything it scanned if it fails, so we must only call it
michael@0	8427	// if there is no alternative to consuming a <box-position>.
michael@0	8428	// ParseVariant, as used here, will either succeed and consume
michael@0	8429	// a single token, or fail and consume none, so we can be more
michael@0	8430	// cavalier about calling it.
michael@0	8431
michael@0	8432	bool haveGradientLine = false;
michael@0	8433	switch (aType) {
michael@0	8434	case eCSSToken_Percentage:
michael@0	8435	case eCSSToken_Number:
michael@0	8436	case eCSSToken_Dimension:
michael@0	8437	haveGradientLine = true;
michael@0	8438	break;
michael@0	8439
michael@0	8440	case eCSSToken_Function:
michael@0	8441	if (aId.LowerCaseEqualsLiteral("calc") ||
michael@0	8442	aId.LowerCaseEqualsLiteral("-moz-calc")) {
michael@0	8443	haveGradientLine = true;
michael@0	8444	break;
michael@0	8445	}
michael@0	8446	// fall through
michael@0	8447	case eCSSToken_ID:
michael@0	8448	case eCSSToken_Hash:
michael@0	8449	// this is a color
michael@0	8450	break;
michael@0	8451
michael@0	8452	case eCSSToken_Ident: {
michael@0	8453	// This is only a gradient line if it's a box position keyword.
michael@0	8454	nsCSSKeyword kw = nsCSSKeywords::LookupKeyword(aId);
michael@0	8455	int32_t junk;
michael@0	8456	if (kw != eCSSKeyword_UNKNOWN &&
michael@0	8457	nsCSSProps::FindKeyword(kw, nsCSSProps::kBackgroundPositionKTable,
michael@0	8458	junk)) {
michael@0	8459	haveGradientLine = true;
michael@0	8460	}
michael@0	8461	break;
michael@0	8462	}
michael@0	8463
michael@0	8464	default:
michael@0	8465	// error
michael@0	8466	break;
michael@0	8467	}
michael@0	8468
michael@0	8469	return haveGradientLine;
michael@0	8470	}
michael@0	8471
michael@0	8472	bool
michael@0	8473	CSSParserImpl::ParseGradientColorStops(nsCSSValueGradient* aGradient,
michael@0	8474	nsCSSValue& aValue)
michael@0	8475	{
michael@0	8476	// At least two color stops are required
michael@0	8477	if (!ParseColorStop(aGradient) ||
michael@0	8478	!ExpectSymbol(',', true) ||
michael@0	8479	!ParseColorStop(aGradient)) {
michael@0	8480	SkipUntil(')');
michael@0	8481	return false;
michael@0	8482	}
michael@0	8483
michael@0	8484	// Additional color stops
michael@0	8485	while (ExpectSymbol(',', true)) {
michael@0	8486	if (!ParseColorStop(aGradient)) {
michael@0	8487	SkipUntil(')');
michael@0	8488	return false;
michael@0	8489	}
michael@0	8490	}
michael@0	8491
michael@0	8492	if (!ExpectSymbol(')', true)) {
michael@0	8493	SkipUntil(')');
michael@0	8494	return false;
michael@0	8495	}
michael@0	8496
michael@0	8497	aValue.SetGradientValue(aGradient);
michael@0	8498	return true;
michael@0	8499	}
michael@0	8500
michael@0	8501	int32_t
michael@0	8502	CSSParserImpl::ParseChoice(nsCSSValue aValues[],
michael@0	8503	const nsCSSProperty aPropIDs[], int32_t aNumIDs)
michael@0	8504	{
michael@0	8505	int32_t found = 0;
michael@0	8506	nsAutoParseCompoundProperty compound(this);
michael@0	8507
michael@0	8508	int32_t loop;
michael@0	8509	for (loop = 0; loop < aNumIDs; loop++) {
michael@0	8510	// Try each property parser in order
michael@0	8511	int32_t hadFound = found;
michael@0	8512	int32_t index;
michael@0	8513	for (index = 0; index < aNumIDs; index++) {
michael@0	8514	int32_t bit = 1 << index;
michael@0	8515	if ((found & bit) == 0) {
michael@0	8516	if (ParseSingleValueProperty(aValues[index], aPropIDs[index])) {
michael@0	8517	found |= bit;
michael@0	8518	// It's more efficient to break since it will reset |hadFound|
michael@0	8519	// to |found|. Furthermore, ParseListStyle depends on our going
michael@0	8520	// through the properties in order for each value..
michael@0	8521	break;
michael@0	8522	}
michael@0	8523	}
michael@0	8524	}
michael@0	8525	if (found == hadFound) { // found nothing new
michael@0	8526	break;
michael@0	8527	}
michael@0	8528	}
michael@0	8529	if (0 < found) {
michael@0	8530	if (1 == found) { // only first property
michael@0	8531	if (eCSSUnit_Inherit == aValues[0].GetUnit()) { // one inherit, all inherit
michael@0	8532	for (loop = 1; loop < aNumIDs; loop++) {
michael@0	8533	aValues[loop].SetInheritValue();
michael@0	8534	}
michael@0	8535	found = ((1 << aNumIDs) - 1);
michael@0	8536	}
michael@0	8537	else if (eCSSUnit_Initial == aValues[0].GetUnit()) { // one initial, all initial
michael@0	8538	for (loop = 1; loop < aNumIDs; loop++) {
michael@0	8539	aValues[loop].SetInitialValue();
michael@0	8540	}
michael@0	8541	found = ((1 << aNumIDs) - 1);
michael@0	8542	}
michael@0	8543	else if (eCSSUnit_Unset == aValues[0].GetUnit()) { // one unset, all unset
michael@0	8544	for (loop = 1; loop < aNumIDs; loop++) {
michael@0	8545	aValues[loop].SetUnsetValue();
michael@0	8546	}
michael@0	8547	found = ((1 << aNumIDs) - 1);
michael@0	8548	}
michael@0	8549	}
michael@0	8550	else { // more than one value, verify no inherits, initials or unsets
michael@0	8551	for (loop = 0; loop < aNumIDs; loop++) {
michael@0	8552	if (eCSSUnit_Inherit == aValues[loop].GetUnit()) {
michael@0	8553	found = -1;
michael@0	8554	break;
michael@0	8555	}
michael@0	8556	else if (eCSSUnit_Initial == aValues[loop].GetUnit()) {
michael@0	8557	found = -1;
michael@0	8558	break;
michael@0	8559	}
michael@0	8560	else if (eCSSUnit_Unset == aValues[loop].GetUnit()) {
michael@0	8561	found = -1;
michael@0	8562	break;
michael@0	8563	}
michael@0	8564	}
michael@0	8565	}
michael@0	8566	}
michael@0	8567	return found;
michael@0	8568	}
michael@0	8569
michael@0	8570	void
michael@0	8571	CSSParserImpl::AppendValue(nsCSSProperty aPropID, const nsCSSValue& aValue)
michael@0	8572	{
michael@0	8573	mTempData.AddLonghandProperty(aPropID, aValue);
michael@0	8574	}
michael@0	8575
michael@0	8576	/**
michael@0	8577	* Parse a "box" property. Box properties have 1 to 4 values. When less
michael@0	8578	* than 4 values are provided a standard mapping is used to replicate
michael@0	8579	* existing values.
michael@0	8580	*/
michael@0	8581	bool
michael@0	8582	CSSParserImpl::ParseBoxProperties(const nsCSSProperty aPropIDs[])
michael@0	8583	{
michael@0	8584	// Get up to four values for the property
michael@0	8585	int32_t count = 0;
michael@0	8586	nsCSSRect result;
michael@0	8587	NS_FOR_CSS_SIDES (index) {
michael@0	8588	if (! ParseSingleValueProperty(result.*(nsCSSRect::sides[index]),
michael@0	8589	aPropIDs[index])) {
michael@0	8590	break;
michael@0	8591	}
michael@0	8592	count++;
michael@0	8593	}
michael@0	8594	if (count == 0) {
michael@0	8595	return false;
michael@0	8596	}
michael@0	8597
michael@0	8598	if (1 < count) { // verify no more than single inherit, initial or unset
michael@0	8599	NS_FOR_CSS_SIDES (index) {
michael@0	8600	nsCSSUnit unit = (result.*(nsCSSRect::sides[index])).GetUnit();
michael@0	8601	if (eCSSUnit_Inherit == unit ||
michael@0	8602	eCSSUnit_Initial == unit ||
michael@0	8603	eCSSUnit_Unset == unit) {
michael@0	8604	return false;
michael@0	8605	}
michael@0	8606	}
michael@0	8607	}
michael@0	8608
michael@0	8609	// Provide missing values by replicating some of the values found
michael@0	8610	switch (count) {
michael@0	8611	case 1: // Make right == top
michael@0	8612	result.mRight = result.mTop;
michael@0	8613	case 2: // Make bottom == top
michael@0	8614	result.mBottom = result.mTop;
michael@0	8615	case 3: // Make left == right
michael@0	8616	result.mLeft = result.mRight;
michael@0	8617	}
michael@0	8618
michael@0	8619	NS_FOR_CSS_SIDES (index) {
michael@0	8620	AppendValue(aPropIDs[index], result.*(nsCSSRect::sides[index]));
michael@0	8621	}
michael@0	8622	return true;
michael@0	8623	}
michael@0	8624
michael@0	8625	// Similar to ParseBoxProperties, except there is only one property
michael@0	8626	// with the result as its value, not four. Requires values be nonnegative.
michael@0	8627	bool
michael@0	8628	CSSParserImpl::ParseGroupedBoxProperty(int32_t aVariantMask,
michael@0	8629	/** outparam */ nsCSSValue& aValue)
michael@0	8630	{
michael@0	8631	nsCSSRect& result = aValue.SetRectValue();
michael@0	8632
michael@0	8633	int32_t count = 0;
michael@0	8634	NS_FOR_CSS_SIDES (index) {
michael@0	8635	if (!ParseNonNegativeVariant(result.*(nsCSSRect::sides[index]),
michael@0	8636	aVariantMask, nullptr)) {
michael@0	8637	break;
michael@0	8638	}
michael@0	8639	count++;
michael@0	8640	}
michael@0	8641
michael@0	8642	if (count == 0) {
michael@0	8643	return false;
michael@0	8644	}
michael@0	8645
michael@0	8646	// Provide missing values by replicating some of the values found
michael@0	8647	switch (count) {
michael@0	8648	case 1: // Make right == top
michael@0	8649	result.mRight = result.mTop;
michael@0	8650	case 2: // Make bottom == top
michael@0	8651	result.mBottom = result.mTop;
michael@0	8652	case 3: // Make left == right
michael@0	8653	result.mLeft = result.mRight;
michael@0	8654	}
michael@0	8655
michael@0	8656	return true;
michael@0	8657	}
michael@0	8658
michael@0	8659	bool
michael@0	8660	CSSParserImpl::ParseDirectionalBoxProperty(nsCSSProperty aProperty,
michael@0	8661	int32_t aSourceType)
michael@0	8662	{
michael@0	8663	const nsCSSProperty* subprops = nsCSSProps::SubpropertyEntryFor(aProperty);
michael@0	8664	NS_ASSERTION(subprops[3] == eCSSProperty_UNKNOWN,
michael@0	8665	"not box property with physical vs. logical cascading");
michael@0	8666	nsCSSValue value;
michael@0	8667	if (!ParseSingleValueProperty(value, subprops[0])) {
michael@0	8668	return false;
michael@0	8669	}
michael@0	8670
michael@0	8671	AppendValue(subprops[0], value);
michael@0	8672	nsCSSValue typeVal(aSourceType, eCSSUnit_Enumerated);
michael@0	8673	AppendValue(subprops[1], typeVal);
michael@0	8674	AppendValue(subprops[2], typeVal);
michael@0	8675	return true;
michael@0	8676	}
michael@0	8677
michael@0	8678	bool
michael@0	8679	CSSParserImpl::ParseBoxCornerRadius(nsCSSProperty aPropID)
michael@0	8680	{
michael@0	8681	nsCSSValue dimenX, dimenY;
michael@0	8682	// required first value
michael@0	8683	if (! ParseNonNegativeVariant(dimenX, VARIANT_HLP | VARIANT_CALC, nullptr))
michael@0	8684	return false;
michael@0	8685
michael@0	8686	// optional second value (forbidden if first value is inherit/initial/unset)
michael@0	8687	if (dimenX.GetUnit() != eCSSUnit_Inherit &&
michael@0	8688	dimenX.GetUnit() != eCSSUnit_Initial &&
michael@0	8689	dimenX.GetUnit() != eCSSUnit_Unset) {
michael@0	8690	ParseNonNegativeVariant(dimenY, VARIANT_LP | VARIANT_CALC, nullptr);
michael@0	8691	}
michael@0	8692
michael@0	8693	if (dimenX == dimenY || dimenY.GetUnit() == eCSSUnit_Null) {
michael@0	8694	AppendValue(aPropID, dimenX);
michael@0	8695	} else {
michael@0	8696	nsCSSValue value;
michael@0	8697	value.SetPairValue(dimenX, dimenY);
michael@0	8698	AppendValue(aPropID, value);
michael@0	8699	}
michael@0	8700	return true;
michael@0	8701	}
michael@0	8702
michael@0	8703	bool
michael@0	8704	CSSParserImpl::ParseBoxCornerRadii(const nsCSSProperty aPropIDs[])
michael@0	8705	{
michael@0	8706	// Rectangles are used as scratch storage.
michael@0	8707	// top => top-left, right => top-right,
michael@0	8708	// bottom => bottom-right, left => bottom-left.
michael@0	8709	nsCSSRect dimenX, dimenY;
michael@0	8710	int32_t countX = 0, countY = 0;
michael@0	8711
michael@0	8712	NS_FOR_CSS_SIDES (side) {
michael@0	8713	if (! ParseNonNegativeVariant(dimenX.*nsCSSRect::sides[side],
michael@0	8714	(side > 0 ? 0 : VARIANT_INHERIT) |
michael@0	8715	VARIANT_LP | VARIANT_CALC,
michael@0	8716	nullptr))
michael@0	8717	break;
michael@0	8718	countX++;
michael@0	8719	}
michael@0	8720	if (countX == 0)
michael@0	8721	return false;
michael@0	8722
michael@0	8723	if (ExpectSymbol('/', true)) {
michael@0	8724	NS_FOR_CSS_SIDES (side) {
michael@0	8725	if (! ParseNonNegativeVariant(dimenY.*nsCSSRect::sides[side],
michael@0	8726	VARIANT_LP | VARIANT_CALC, nullptr))
michael@0	8727	break;
michael@0	8728	countY++;
michael@0	8729	}
michael@0	8730	if (countY == 0)
michael@0	8731	return false;
michael@0	8732	}
michael@0	8733
michael@0	8734	// if 'initial', 'inherit' or 'unset' was used, it must be the only value
michael@0	8735	if (countX > 1 || countY > 0) {
michael@0	8736	nsCSSUnit unit = dimenX.mTop.GetUnit();
michael@0	8737	if (eCSSUnit_Inherit == unit ||
michael@0	8738	eCSSUnit_Initial == unit ||
michael@0	8739	eCSSUnit_Unset == unit)
michael@0	8740	return false;
michael@0	8741	}
michael@0	8742
michael@0	8743	// if we have no Y-values, use the X-values
michael@0	8744	if (countY == 0) {
michael@0	8745	dimenY = dimenX;
michael@0	8746	countY = countX;
michael@0	8747	}
michael@0	8748
michael@0	8749	// Provide missing values by replicating some of the values found
michael@0	8750	switch (countX) {
michael@0	8751	case 1: dimenX.mRight = dimenX.mTop; // top-right same as top-left, and
michael@0	8752	case 2: dimenX.mBottom = dimenX.mTop; // bottom-right same as top-left, and
michael@0	8753	case 3: dimenX.mLeft = dimenX.mRight; // bottom-left same as top-right
michael@0	8754	}
michael@0	8755
michael@0	8756	switch (countY) {
michael@0	8757	case 1: dimenY.mRight = dimenY.mTop; // top-right same as top-left, and
michael@0	8758	case 2: dimenY.mBottom = dimenY.mTop; // bottom-right same as top-left, and
michael@0	8759	case 3: dimenY.mLeft = dimenY.mRight; // bottom-left same as top-right
michael@0	8760	}
michael@0	8761
michael@0	8762	NS_FOR_CSS_SIDES(side) {
michael@0	8763	nsCSSValue& x = dimenX.*nsCSSRect::sides[side];
michael@0	8764	nsCSSValue& y = dimenY.*nsCSSRect::sides[side];
michael@0	8765
michael@0	8766	if (x == y) {
michael@0	8767	AppendValue(aPropIDs[side], x);
michael@0	8768	} else {
michael@0	8769	nsCSSValue pair;
michael@0	8770	pair.SetPairValue(x, y);
michael@0	8771	AppendValue(aPropIDs[side], pair);
michael@0	8772	}
michael@0	8773	}
michael@0	8774	return true;
michael@0	8775	}
michael@0	8776
michael@0	8777	// These must be in CSS order (top,right,bottom,left) for indexing to work
michael@0	8778	static const nsCSSProperty kBorderStyleIDs[] = {
michael@0	8779	eCSSProperty_border_top_style,
michael@0	8780	eCSSProperty_border_right_style_value,
michael@0	8781	eCSSProperty_border_bottom_style,
michael@0	8782	eCSSProperty_border_left_style_value
michael@0	8783	};
michael@0	8784	static const nsCSSProperty kBorderWidthIDs[] = {
michael@0	8785	eCSSProperty_border_top_width,
michael@0	8786	eCSSProperty_border_right_width_value,
michael@0	8787	eCSSProperty_border_bottom_width,
michael@0	8788	eCSSProperty_border_left_width_value
michael@0	8789	};
michael@0	8790	static const nsCSSProperty kBorderColorIDs[] = {
michael@0	8791	eCSSProperty_border_top_color,
michael@0	8792	eCSSProperty_border_right_color_value,
michael@0	8793	eCSSProperty_border_bottom_color,
michael@0	8794	eCSSProperty_border_left_color_value
michael@0	8795	};
michael@0	8796	static const nsCSSProperty kBorderRadiusIDs[] = {
michael@0	8797	eCSSProperty_border_top_left_radius,
michael@0	8798	eCSSProperty_border_top_right_radius,
michael@0	8799	eCSSProperty_border_bottom_right_radius,
michael@0	8800	eCSSProperty_border_bottom_left_radius
michael@0	8801	};
michael@0	8802	static const nsCSSProperty kOutlineRadiusIDs[] = {
michael@0	8803	eCSSProperty__moz_outline_radius_topLeft,
michael@0	8804	eCSSProperty__moz_outline_radius_topRight,
michael@0	8805	eCSSProperty__moz_outline_radius_bottomRight,
michael@0	8806	eCSSProperty__moz_outline_radius_bottomLeft
michael@0	8807	};
michael@0	8808
michael@0	8809	void
michael@0	8810	CSSParserImpl::SaveInputState(CSSParserInputState& aState)
michael@0	8811	{
michael@0	8812	aState.mToken = mToken;
michael@0	8813	aState.mHavePushBack = mHavePushBack;
michael@0	8814	mScanner->SavePosition(aState.mPosition);
michael@0	8815	}
michael@0	8816
michael@0	8817	void
michael@0	8818	CSSParserImpl::RestoreSavedInputState(const CSSParserInputState& aState)
michael@0	8819	{
michael@0	8820	mToken = aState.mToken;
michael@0	8821	mHavePushBack = aState.mHavePushBack;
michael@0	8822	mScanner->RestoreSavedPosition(aState.mPosition);
michael@0	8823	}
michael@0	8824
michael@0	8825	bool
michael@0	8826	CSSParserImpl::ParseProperty(nsCSSProperty aPropID)
michael@0	8827	{
michael@0	8828	// Can't use AutoRestore<bool> because it's a bitfield.
michael@0	8829	NS_ABORT_IF_FALSE(!mHashlessColorQuirk,
michael@0	8830	"hashless color quirk should not be set");
michael@0	8831	NS_ABORT_IF_FALSE(!mUnitlessLengthQuirk,
michael@0	8832	"unitless length quirk should not be set");
michael@0	8833
michael@0	8834	if (mNavQuirkMode) {
michael@0	8835	mHashlessColorQuirk =
michael@0	8836	nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_HASHLESS_COLOR_QUIRK);
michael@0	8837	mUnitlessLengthQuirk =
michael@0	8838	nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_UNITLESS_LENGTH_QUIRK);
michael@0	8839	}
michael@0	8840
michael@0	8841	// Save the current input state so that we can restore it later if we
michael@0	8842	// have to re-parse the property value as a variable-reference-containing
michael@0	8843	// token stream.
michael@0	8844	CSSParserInputState stateBeforeProperty;
michael@0	8845	SaveInputState(stateBeforeProperty);
michael@0	8846	mScanner->ClearSeenVariableReference();
michael@0	8847
michael@0	8848	NS_ASSERTION(aPropID < eCSSProperty_COUNT, "index out of range");
michael@0	8849	bool allowVariables = true;
michael@0	8850	bool result;
michael@0	8851	switch (nsCSSProps::PropertyParseType(aPropID)) {
michael@0	8852	case CSS_PROPERTY_PARSE_INACCESSIBLE: {
michael@0	8853	// The user can't use these
michael@0	8854	REPORT_UNEXPECTED(PEInaccessibleProperty2);
michael@0	8855	allowVariables = false;
michael@0	8856	result = false;
michael@0	8857	break;
michael@0	8858	}
michael@0	8859	case CSS_PROPERTY_PARSE_FUNCTION: {
michael@0	8860	result = ParsePropertyByFunction(aPropID);
michael@0	8861	break;
michael@0	8862	}
michael@0	8863	case CSS_PROPERTY_PARSE_VALUE: {
michael@0	8864	result = false;
michael@0	8865	nsCSSValue value;
michael@0	8866	if (ParseSingleValueProperty(value, aPropID)) {
michael@0	8867	AppendValue(aPropID, value);
michael@0	8868	result = true;
michael@0	8869	}
michael@0	8870	// XXX Report errors?
michael@0	8871	break;
michael@0	8872	}
michael@0	8873	case CSS_PROPERTY_PARSE_VALUE_LIST: {
michael@0	8874	result = ParseValueList(aPropID);
michael@0	8875	break;
michael@0	8876	}
michael@0	8877	default: {
michael@0	8878	result = false;
michael@0	8879	allowVariables = false;
michael@0	8880	NS_ABORT_IF_FALSE(false,
michael@0	8881	"Property's flags field in nsCSSPropList.h is missing "
michael@0	8882	"one of the CSS_PROPERTY_PARSE_* constants");
michael@0	8883	break;
michael@0	8884	}
michael@0	8885	}
michael@0	8886
michael@0	8887	if (result) {
michael@0	8888	// We need to call ExpectEndProperty() to decide whether to reparse
michael@0	8889	// with variables. This is needed because the property parsing may
michael@0	8890	// have stopped upon finding a variable (e.g., 'margin: 1px var(a)')
michael@0	8891	// in a way that future variable substitutions will be valid, or
michael@0	8892	// because it parsed everything that's possible but we still want to
michael@0	8893	// act as though the property contains variables even though we know
michael@0	8894	// the substitution will never work (e.g., for 'margin: 1px 2px 3px
michael@0	8895	// 4px 5px var(a)').
michael@0	8896	//
michael@0	8897	// It would be nice to find a better solution here
michael@0	8898	// (and for the SkipUntilOneOf below), though, that doesn't depend
michael@0	8899	// on using what we don't accept for doing parsing correctly.
michael@0	8900	if (!ExpectEndProperty()) {
michael@0	8901	result = false;
michael@0	8902	}
michael@0	8903	}
michael@0	8904
michael@0	8905	bool seenVariable = mScanner->SeenVariableReference() ||
michael@0	8906	(stateBeforeProperty.mHavePushBack &&
michael@0	8907	stateBeforeProperty.mToken.mType == eCSSToken_Function &&
michael@0	8908	stateBeforeProperty.mToken.mIdent.LowerCaseEqualsLiteral("var"));
michael@0	8909	bool parseAsTokenStream;
michael@0	8910
michael@0	8911	if (!result && allowVariables) {
michael@0	8912	parseAsTokenStream = true;
michael@0	8913	if (!seenVariable) {
michael@0	8914	// We might have stopped parsing the property before its end and before
michael@0	8915	// finding a variable reference. Keep checking until the end of the
michael@0	8916	// property.
michael@0	8917	CSSParserInputState stateAtError;
michael@0	8918	SaveInputState(stateAtError);
michael@0	8919
michael@0	8920	const char16_t stopChars[] = { ';', '!', '}', ')', 0 };
michael@0	8921	SkipUntilOneOf(stopChars);
michael@0	8922	UngetToken();
michael@0	8923	parseAsTokenStream = mScanner->SeenVariableReference();
michael@0	8924
michael@0	8925	if (!parseAsTokenStream) {
michael@0	8926	// If we parsed to the end of the propery and didn't find any variable
michael@0	8927	// references, then the real position we want to report the error at
michael@0	8928	// is |stateAtError|.
michael@0	8929	RestoreSavedInputState(stateAtError);
michael@0	8930	}
michael@0	8931	}
michael@0	8932	} else {
michael@0	8933	parseAsTokenStream = false;
michael@0	8934	}
michael@0	8935
michael@0	8936	if (parseAsTokenStream) {
michael@0	8937	// Go back to the start of the property value and parse it to make sure
michael@0	8938	// its variable references are syntactically valid and is otherwise
michael@0	8939	// balanced.
michael@0	8940	RestoreSavedInputState(stateBeforeProperty);
michael@0	8941
michael@0	8942	if (!mInSupportsCondition) {
michael@0	8943	mScanner->StartRecording();
michael@0	8944	}
michael@0	8945
michael@0	8946	CSSVariableDeclarations::Type type;
michael@0	8947	bool dropBackslash;
michael@0	8948	nsString impliedCharacters;
michael@0	8949	nsCSSValue value;
michael@0	8950	if (ParseValueWithVariables(&type, &dropBackslash, impliedCharacters,
michael@0	8951	nullptr, nullptr)) {
michael@0	8952	MOZ_ASSERT(type == CSSVariableDeclarations::eTokenStream,
michael@0	8953	"a non-custom property reparsed since it contained variable "
michael@0	8954	"references should not have been 'initial' or 'inherit'");
michael@0	8955
michael@0	8956	nsString propertyValue;
michael@0	8957
michael@0	8958	if (!mInSupportsCondition) {
michael@0	8959	// If we are in an @supports condition, we don't need to store the
michael@0	8960	// actual token stream on the nsCSSValue.
michael@0	8961	mScanner->StopRecording(propertyValue);
michael@0	8962	if (dropBackslash) {
michael@0	8963	MOZ_ASSERT(!propertyValue.IsEmpty() &&
michael@0	8964	propertyValue[propertyValue.Length() - 1] == '\\');
michael@0	8965	propertyValue.Truncate(propertyValue.Length() - 1);
michael@0	8966	}
michael@0	8967	propertyValue.Append(impliedCharacters);
michael@0	8968	}
michael@0	8969
michael@0	8970	if (mHavePushBack) {
michael@0	8971	// If we came to the end of a property value that had a variable
michael@0	8972	// reference and a token was pushed back, then it would have been
michael@0	8973	// ended by '!', ')', ';', ']' or '}'. We should remove it from the
michael@0	8974	// recorded property value.
michael@0	8975	MOZ_ASSERT(mToken.IsSymbol('!') ||
michael@0	8976	mToken.IsSymbol(')') ||
michael@0	8977	mToken.IsSymbol(';') ||
michael@0	8978	mToken.IsSymbol(']') ||
michael@0	8979	mToken.IsSymbol('}'));
michael@0	8980	if (!mInSupportsCondition) {
michael@0	8981	MOZ_ASSERT(!propertyValue.IsEmpty());
michael@0	8982	MOZ_ASSERT(propertyValue[propertyValue.Length() - 1] ==
michael@0	8983	mToken.mSymbol);
michael@0	8984	propertyValue.Truncate(propertyValue.Length() - 1);
michael@0	8985	}
michael@0	8986	}
michael@0	8987
michael@0	8988	if (!mInSupportsCondition) {
michael@0	8989	if (nsCSSProps::IsShorthand(aPropID)) {
michael@0	8990	// If this is a shorthand property, we store the token stream on each
michael@0	8991	// of its corresponding longhand properties.
michael@0	8992	CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aPropID) {
michael@0	8993	nsCSSValueTokenStream* tokenStream = new nsCSSValueTokenStream;
michael@0	8994	tokenStream->mPropertyID = *p;
michael@0	8995	tokenStream->mShorthandPropertyID = aPropID;
michael@0	8996	tokenStream->mTokenStream = propertyValue;
michael@0	8997	tokenStream->mBaseURI = mBaseURI;
michael@0	8998	tokenStream->mSheetURI = mSheetURI;
michael@0	8999	tokenStream->mSheetPrincipal = mSheetPrincipal;
michael@0	9000	tokenStream->mSheet = mSheet;
michael@0	9001	tokenStream->mLineNumber = stateBeforeProperty.mPosition.LineNumber();
michael@0	9002	tokenStream->mLineOffset = stateBeforeProperty.mPosition.LineOffset();
michael@0	9003	value.SetTokenStreamValue(tokenStream);
michael@0	9004	AppendValue(*p, value);
michael@0	9005	}
michael@0	9006	} else {
michael@0	9007	nsCSSValueTokenStream* tokenStream = new nsCSSValueTokenStream;
michael@0	9008	tokenStream->mPropertyID = aPropID;
michael@0	9009	tokenStream->mTokenStream = propertyValue;
michael@0	9010	tokenStream->mBaseURI = mBaseURI;
michael@0	9011	tokenStream->mSheetURI = mSheetURI;
michael@0	9012	tokenStream->mSheetPrincipal = mSheetPrincipal;
michael@0	9013	tokenStream->mSheet = mSheet;
michael@0	9014	tokenStream->mLineNumber = stateBeforeProperty.mPosition.LineNumber();
michael@0	9015	tokenStream->mLineOffset = stateBeforeProperty.mPosition.LineOffset();
michael@0	9016	value.SetTokenStreamValue(tokenStream);
michael@0	9017	AppendValue(aPropID, value);
michael@0	9018	}
michael@0	9019	}
michael@0	9020	result = true;
michael@0	9021	} else {
michael@0	9022	if (!mInSupportsCondition) {
michael@0	9023	mScanner->StopRecording();
michael@0	9024	}
michael@0	9025	}
michael@0	9026	}
michael@0	9027
michael@0	9028	if (mNavQuirkMode) {
michael@0	9029	mHashlessColorQuirk = false;
michael@0	9030	mUnitlessLengthQuirk = false;
michael@0	9031	}
michael@0	9032
michael@0	9033	return result;
michael@0	9034	}
michael@0	9035
michael@0	9036	bool
michael@0	9037	CSSParserImpl::ParsePropertyByFunction(nsCSSProperty aPropID)
michael@0	9038	{
michael@0	9039	switch (aPropID) { // handle shorthand or multiple properties
michael@0	9040	case eCSSProperty_background:
michael@0	9041	return ParseBackground();
michael@0	9042	case eCSSProperty_background_repeat:
michael@0	9043	return ParseBackgroundRepeat();
michael@0	9044	case eCSSProperty_background_position:
michael@0	9045	return ParseBackgroundPosition();
michael@0	9046	case eCSSProperty_background_size:
michael@0	9047	return ParseBackgroundSize();
michael@0	9048	case eCSSProperty_border:
michael@0	9049	return ParseBorderSide(kBorderTopIDs, true);
michael@0	9050	case eCSSProperty_border_color:
michael@0	9051	return ParseBorderColor();
michael@0	9052	case eCSSProperty_border_spacing:
michael@0	9053	return ParseBorderSpacing();
michael@0	9054	case eCSSProperty_border_style:
michael@0	9055	return ParseBorderStyle();
michael@0	9056	case eCSSProperty_border_bottom:
michael@0	9057	return ParseBorderSide(kBorderBottomIDs, false);
michael@0	9058	case eCSSProperty_border_end:
michael@0	9059	return ParseDirectionalBorderSide(kBorderEndIDs,
michael@0	9060	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9061	case eCSSProperty_border_left:
michael@0	9062	return ParseDirectionalBorderSide(kBorderLeftIDs,
michael@0	9063	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9064	case eCSSProperty_border_right:
michael@0	9065	return ParseDirectionalBorderSide(kBorderRightIDs,
michael@0	9066	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9067	case eCSSProperty_border_start:
michael@0	9068	return ParseDirectionalBorderSide(kBorderStartIDs,
michael@0	9069	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9070	case eCSSProperty_border_top:
michael@0	9071	return ParseBorderSide(kBorderTopIDs, false);
michael@0	9072	case eCSSProperty_border_bottom_colors:
michael@0	9073	case eCSSProperty_border_left_colors:
michael@0	9074	case eCSSProperty_border_right_colors:
michael@0	9075	case eCSSProperty_border_top_colors:
michael@0	9076	return ParseBorderColors(aPropID);
michael@0	9077	case eCSSProperty_border_image_slice:
michael@0	9078	return ParseBorderImageSlice(true, nullptr);
michael@0	9079	case eCSSProperty_border_image_width:
michael@0	9080	return ParseBorderImageWidth(true);
michael@0	9081	case eCSSProperty_border_image_outset:
michael@0	9082	return ParseBorderImageOutset(true);
michael@0	9083	case eCSSProperty_border_image_repeat:
michael@0	9084	return ParseBorderImageRepeat(true);
michael@0	9085	case eCSSProperty_border_image:
michael@0	9086	return ParseBorderImage();
michael@0	9087	case eCSSProperty_border_width:
michael@0	9088	return ParseBorderWidth();
michael@0	9089	case eCSSProperty_border_end_color:
michael@0	9090	return ParseDirectionalBoxProperty(eCSSProperty_border_end_color,
michael@0	9091	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9092	case eCSSProperty_border_left_color:
michael@0	9093	return ParseDirectionalBoxProperty(eCSSProperty_border_left_color,
michael@0	9094	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9095	case eCSSProperty_border_right_color:
michael@0	9096	return ParseDirectionalBoxProperty(eCSSProperty_border_right_color,
michael@0	9097	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9098	case eCSSProperty_border_start_color:
michael@0	9099	return ParseDirectionalBoxProperty(eCSSProperty_border_start_color,
michael@0	9100	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9101	case eCSSProperty_border_end_width:
michael@0	9102	return ParseDirectionalBoxProperty(eCSSProperty_border_end_width,
michael@0	9103	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9104	case eCSSProperty_border_left_width:
michael@0	9105	return ParseDirectionalBoxProperty(eCSSProperty_border_left_width,
michael@0	9106	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9107	case eCSSProperty_border_right_width:
michael@0	9108	return ParseDirectionalBoxProperty(eCSSProperty_border_right_width,
michael@0	9109	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9110	case eCSSProperty_border_start_width:
michael@0	9111	return ParseDirectionalBoxProperty(eCSSProperty_border_start_width,
michael@0	9112	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9113	case eCSSProperty_border_end_style:
michael@0	9114	return ParseDirectionalBoxProperty(eCSSProperty_border_end_style,
michael@0	9115	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9116	case eCSSProperty_border_left_style:
michael@0	9117	return ParseDirectionalBoxProperty(eCSSProperty_border_left_style,
michael@0	9118	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9119	case eCSSProperty_border_right_style:
michael@0	9120	return ParseDirectionalBoxProperty(eCSSProperty_border_right_style,
michael@0	9121	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9122	case eCSSProperty_border_start_style:
michael@0	9123	return ParseDirectionalBoxProperty(eCSSProperty_border_start_style,
michael@0	9124	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9125	case eCSSProperty_border_radius:
michael@0	9126	return ParseBoxCornerRadii(kBorderRadiusIDs);
michael@0	9127	case eCSSProperty__moz_outline_radius:
michael@0	9128	return ParseBoxCornerRadii(kOutlineRadiusIDs);
michael@0	9129
michael@0	9130	case eCSSProperty_border_top_left_radius:
michael@0	9131	case eCSSProperty_border_top_right_radius:
michael@0	9132	case eCSSProperty_border_bottom_right_radius:
michael@0	9133	case eCSSProperty_border_bottom_left_radius:
michael@0	9134	case eCSSProperty__moz_outline_radius_topLeft:
michael@0	9135	case eCSSProperty__moz_outline_radius_topRight:
michael@0	9136	case eCSSProperty__moz_outline_radius_bottomRight:
michael@0	9137	case eCSSProperty__moz_outline_radius_bottomLeft:
michael@0	9138	return ParseBoxCornerRadius(aPropID);
michael@0	9139
michael@0	9140	case eCSSProperty_box_shadow:
michael@0	9141	case eCSSProperty_text_shadow:
michael@0	9142	return ParseShadowList(aPropID);
michael@0	9143
michael@0	9144	case eCSSProperty_clip:
michael@0	9145	return ParseRect(eCSSProperty_clip);
michael@0	9146	case eCSSProperty__moz_columns:
michael@0	9147	return ParseColumns();
michael@0	9148	case eCSSProperty__moz_column_rule:
michael@0	9149	return ParseBorderSide(kColumnRuleIDs, false);
michael@0	9150	case eCSSProperty_content:
michael@0	9151	return ParseContent();
michael@0	9152	case eCSSProperty_counter_increment:
michael@0	9153	case eCSSProperty_counter_reset:
michael@0	9154	return ParseCounterData(aPropID);
michael@0	9155	case eCSSProperty_cursor:
michael@0	9156	return ParseCursor();
michael@0	9157	case eCSSProperty_filter:
michael@0	9158	return ParseFilter();
michael@0	9159	case eCSSProperty_flex:
michael@0	9160	return ParseFlex();
michael@0	9161	case eCSSProperty_flex_flow:
michael@0	9162	return ParseFlexFlow();
michael@0	9163	case eCSSProperty_font:
michael@0	9164	return ParseFont();
michael@0	9165	case eCSSProperty_grid_auto_flow:
michael@0	9166	return ParseGridAutoFlow();
michael@0	9167	case eCSSProperty_grid_auto_columns:
michael@0	9168	case eCSSProperty_grid_auto_rows:
michael@0	9169	return ParseGridAutoColumnsRows(aPropID);
michael@0	9170	case eCSSProperty_grid_template_areas:
michael@0	9171	return ParseGridTemplateAreas();
michael@0	9172	case eCSSProperty_grid_template_columns:
michael@0	9173	case eCSSProperty_grid_template_rows:
michael@0	9174	return ParseGridTemplateColumnsRows(aPropID);
michael@0	9175	case eCSSProperty_grid_template:
michael@0	9176	return ParseGridTemplate();
michael@0	9177	case eCSSProperty_grid:
michael@0	9178	return ParseGrid();
michael@0	9179	case eCSSProperty_grid_auto_position:
michael@0	9180	return ParseGridAutoPosition();
michael@0	9181	case eCSSProperty_grid_column_start:
michael@0	9182	case eCSSProperty_grid_column_end:
michael@0	9183	case eCSSProperty_grid_row_start:
michael@0	9184	case eCSSProperty_grid_row_end:
michael@0	9185	return ParseGridColumnRowStartEnd(aPropID);
michael@0	9186	case eCSSProperty_grid_column:
michael@0	9187	return ParseGridColumnRow(eCSSProperty_grid_column_start,
michael@0	9188	eCSSProperty_grid_column_end);
michael@0	9189	case eCSSProperty_grid_row:
michael@0	9190	return ParseGridColumnRow(eCSSProperty_grid_row_start,
michael@0	9191	eCSSProperty_grid_row_end);
michael@0	9192	case eCSSProperty_grid_area:
michael@0	9193	return ParseGridArea();
michael@0	9194	case eCSSProperty_image_region:
michael@0	9195	return ParseRect(eCSSProperty_image_region);
michael@0	9196	case eCSSProperty_list_style:
michael@0	9197	return ParseListStyle();
michael@0	9198	case eCSSProperty_margin:
michael@0	9199	return ParseMargin();
michael@0	9200	case eCSSProperty_margin_end:
michael@0	9201	return ParseDirectionalBoxProperty(eCSSProperty_margin_end,
michael@0	9202	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9203	case eCSSProperty_margin_left:
michael@0	9204	return ParseDirectionalBoxProperty(eCSSProperty_margin_left,
michael@0	9205	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9206	case eCSSProperty_margin_right:
michael@0	9207	return ParseDirectionalBoxProperty(eCSSProperty_margin_right,
michael@0	9208	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9209	case eCSSProperty_margin_start:
michael@0	9210	return ParseDirectionalBoxProperty(eCSSProperty_margin_start,
michael@0	9211	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9212	case eCSSProperty_outline:
michael@0	9213	return ParseOutline();
michael@0	9214	case eCSSProperty_overflow:
michael@0	9215	return ParseOverflow();
michael@0	9216	case eCSSProperty_padding:
michael@0	9217	return ParsePadding();
michael@0	9218	case eCSSProperty_padding_end:
michael@0	9219	return ParseDirectionalBoxProperty(eCSSProperty_padding_end,
michael@0	9220	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9221	case eCSSProperty_padding_left:
michael@0	9222	return ParseDirectionalBoxProperty(eCSSProperty_padding_left,
michael@0	9223	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9224	case eCSSProperty_padding_right:
michael@0	9225	return ParseDirectionalBoxProperty(eCSSProperty_padding_right,
michael@0	9226	NS_BOXPROP_SOURCE_PHYSICAL);
michael@0	9227	case eCSSProperty_padding_start:
michael@0	9228	return ParseDirectionalBoxProperty(eCSSProperty_padding_start,
michael@0	9229	NS_BOXPROP_SOURCE_LOGICAL);
michael@0	9230	case eCSSProperty_quotes:
michael@0	9231	return ParseQuotes();
michael@0	9232	case eCSSProperty_size:
michael@0	9233	return ParseSize();
michael@0	9234	case eCSSProperty_text_decoration:
michael@0	9235	return ParseTextDecoration();
michael@0	9236	case eCSSProperty_will_change:
michael@0	9237	return ParseWillChange();
michael@0	9238	case eCSSProperty_transform:
michael@0	9239	return ParseTransform(false);
michael@0	9240	case eCSSProperty__moz_transform:
michael@0	9241	return ParseTransform(true);
michael@0	9242	case eCSSProperty_transform_origin:
michael@0	9243	return ParseTransformOrigin(false);
michael@0	9244	case eCSSProperty_perspective_origin:
michael@0	9245	return ParseTransformOrigin(true);
michael@0	9246	case eCSSProperty_transition:
michael@0	9247	return ParseTransition();
michael@0	9248	case eCSSProperty_animation:
michael@0	9249	return ParseAnimation();
michael@0	9250	case eCSSProperty_transition_property:
michael@0	9251	return ParseTransitionProperty();
michael@0	9252	case eCSSProperty_fill:
michael@0	9253	case eCSSProperty_stroke:
michael@0	9254	return ParsePaint(aPropID);
michael@0	9255	case eCSSProperty_stroke_dasharray:
michael@0	9256	return ParseDasharray();
michael@0	9257	case eCSSProperty_marker:
michael@0	9258	return ParseMarker();
michael@0	9259	case eCSSProperty_paint_order:
michael@0	9260	return ParsePaintOrder();
michael@0	9261	case eCSSProperty_all:
michael@0	9262	return ParseAll();
michael@0	9263	default:
michael@0	9264	NS_ABORT_IF_FALSE(false, "should not be called");
michael@0	9265	return false;
michael@0	9266	}
michael@0	9267	}
michael@0	9268
michael@0	9269	// Bits used in determining which background position info we have
michael@0	9270	#define BG_CENTER NS_STYLE_BG_POSITION_CENTER
michael@0	9271	#define BG_TOP NS_STYLE_BG_POSITION_TOP
michael@0	9272	#define BG_BOTTOM NS_STYLE_BG_POSITION_BOTTOM
michael@0	9273	#define BG_LEFT NS_STYLE_BG_POSITION_LEFT
michael@0	9274	#define BG_RIGHT NS_STYLE_BG_POSITION_RIGHT
michael@0	9275	#define BG_CTB (BG_CENTER | BG_TOP | BG_BOTTOM)
michael@0	9276	#define BG_TB (BG_TOP | BG_BOTTOM)
michael@0	9277	#define BG_CLR (BG_CENTER | BG_LEFT | BG_RIGHT)
michael@0	9278	#define BG_LR (BG_LEFT | BG_RIGHT)
michael@0	9279
michael@0	9280	bool
michael@0	9281	CSSParserImpl::ParseSingleValueProperty(nsCSSValue& aValue,
michael@0	9282	nsCSSProperty aPropID)
michael@0	9283	{
michael@0	9284	if (aPropID == eCSSPropertyExtra_x_none_value) {
michael@0	9285	return ParseVariant(aValue, VARIANT_NONE | VARIANT_INHERIT, nullptr);
michael@0	9286	}
michael@0	9287
michael@0	9288	if (aPropID == eCSSPropertyExtra_x_auto_value) {
michael@0	9289	return ParseVariant(aValue, VARIANT_AUTO | VARIANT_INHERIT, nullptr);
michael@0	9290	}
michael@0	9291
michael@0	9292	if (aPropID < 0 || aPropID >= eCSSProperty_COUNT_no_shorthands) {
michael@0	9293	NS_ABORT_IF_FALSE(false, "not a single value property");
michael@0	9294	return false;
michael@0	9295	}
michael@0	9296
michael@0	9297	if (nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_VALUE_PARSER_FUNCTION)) {
michael@0	9298	switch (aPropID) {
michael@0	9299	case eCSSProperty_font_family:
michael@0	9300	return ParseFamily(aValue);
michael@0	9301	case eCSSProperty_font_synthesis:
michael@0	9302	return ParseFontSynthesis(aValue);
michael@0	9303	case eCSSProperty_font_variant_alternates:
michael@0	9304	return ParseFontVariantAlternates(aValue);
michael@0	9305	case eCSSProperty_font_variant_east_asian:
michael@0	9306	return ParseFontVariantEastAsian(aValue);
michael@0	9307	case eCSSProperty_font_variant_ligatures:
michael@0	9308	return ParseFontVariantLigatures(aValue);
michael@0	9309	case eCSSProperty_font_variant_numeric:
michael@0	9310	return ParseFontVariantNumeric(aValue);
michael@0	9311	case eCSSProperty_font_feature_settings:
michael@0	9312	return ParseFontFeatureSettings(aValue);
michael@0	9313	case eCSSProperty_font_weight:
michael@0	9314	return ParseFontWeight(aValue);
michael@0	9315	case eCSSProperty_image_orientation:
michael@0	9316	return ParseImageOrientation(aValue);
michael@0	9317	case eCSSProperty_marks:
michael@0	9318	return ParseMarks(aValue);
michael@0	9319	case eCSSProperty_text_align:
michael@0	9320	return ParseTextAlign(aValue);
michael@0	9321	case eCSSProperty_text_align_last:
michael@0	9322	return ParseTextAlignLast(aValue);
michael@0	9323	case eCSSProperty_text_decoration_line:
michael@0	9324	return ParseTextDecorationLine(aValue);
michael@0	9325	case eCSSProperty_text_combine_upright:
michael@0	9326	return ParseTextCombineUpright(aValue);
michael@0	9327	case eCSSProperty_text_overflow:
michael@0	9328	return ParseTextOverflow(aValue);
michael@0	9329	case eCSSProperty_touch_action:
michael@0	9330	return ParseTouchAction(aValue);
michael@0	9331	default:
michael@0	9332	NS_ABORT_IF_FALSE(false, "should not reach here");
michael@0	9333	return false;
michael@0	9334	}
michael@0	9335	}
michael@0	9336
michael@0	9337	uint32_t variant = nsCSSProps::ParserVariant(aPropID);
michael@0	9338	if (variant == 0) {
michael@0	9339	NS_ABORT_IF_FALSE(false, "not a single value property");
michael@0	9340	return false;
michael@0	9341	}
michael@0	9342
michael@0	9343	// We only allow 'script-level' when unsafe rules are enabled, because
michael@0	9344	// otherwise it could interfere with rulenode optimizations if used in
michael@0	9345	// a non-MathML-enabled document. We also only allow math-display when
michael@0	9346	// unsafe rules are enabled.
michael@0	9347	if (!mUnsafeRulesEnabled &&
michael@0	9348	(aPropID == eCSSProperty_script_level ||
michael@0	9349	aPropID == eCSSProperty_math_display))
michael@0	9350	return false;
michael@0	9351
michael@0	9352	const KTableValue *kwtable = nsCSSProps::kKeywordTableTable[aPropID];
michael@0	9353	switch (nsCSSProps::ValueRestrictions(aPropID)) {
michael@0	9354	default:
michael@0	9355	NS_ABORT_IF_FALSE(false, "should not be reached");
michael@0	9356	case 0:
michael@0	9357	return ParseVariant(aValue, variant, kwtable);
michael@0	9358	case CSS_PROPERTY_VALUE_NONNEGATIVE:
michael@0	9359	return ParseNonNegativeVariant(aValue, variant, kwtable);
michael@0	9360	case CSS_PROPERTY_VALUE_AT_LEAST_ONE:
michael@0	9361	return ParseOneOrLargerVariant(aValue, variant, kwtable);
michael@0	9362	}
michael@0	9363	}
michael@0	9364
michael@0	9365	// nsFont::EnumerateFamilies callback for ParseFontDescriptorValue
michael@0	9366	struct MOZ_STACK_CLASS ExtractFirstFamilyData {
michael@0	9367	nsAutoString mFamilyName;
michael@0	9368	bool mGood;
michael@0	9369	ExtractFirstFamilyData() : mFamilyName(), mGood(false) {}
michael@0	9370	};
michael@0	9371
michael@0	9372	static bool
michael@0	9373	ExtractFirstFamily(const nsString& aFamily,
michael@0	9374	bool aGeneric,
michael@0	9375	void* aData)
michael@0	9376	{
michael@0	9377	ExtractFirstFamilyData* realData = (ExtractFirstFamilyData*) aData;
michael@0	9378	if (aGeneric || realData->mFamilyName.Length() > 0) {
michael@0	9379	realData->mGood = false;
michael@0	9380	return false;
michael@0	9381	}
michael@0	9382	realData->mFamilyName.Assign(aFamily);
michael@0	9383	realData->mGood = true;
michael@0	9384	return true;
michael@0	9385	}
michael@0	9386
michael@0	9387	// font-descriptor: descriptor ':' value ';'
michael@0	9388	// caller has advanced mToken to point at the descriptor
michael@0	9389	bool
michael@0	9390	CSSParserImpl::ParseFontDescriptorValue(nsCSSFontDesc aDescID,
michael@0	9391	nsCSSValue& aValue)
michael@0	9392	{
michael@0	9393	switch (aDescID) {
michael@0	9394	// These four are similar to the properties of the same name,
michael@0	9395	// possibly with more restrictions on the values they can take.
michael@0	9396	case eCSSFontDesc_Family: {
michael@0	9397	if (!ParseFamily(aValue) ||
michael@0	9398	aValue.GetUnit() != eCSSUnit_Families)
michael@0	9399	return false;
michael@0	9400
michael@0	9401	// the style parameters to the nsFont constructor are ignored,
michael@0	9402	// because it's only being used to call EnumerateFamilies
michael@0	9403	nsAutoString valueStr;
michael@0	9404	aValue.GetStringValue(valueStr);
michael@0	9405	nsFont font(valueStr, 0, 0, 0, 0, 0, 0);
michael@0	9406	ExtractFirstFamilyData dat;
michael@0	9407
michael@0	9408	font.EnumerateFamilies(ExtractFirstFamily, (void*) &dat);
michael@0	9409	if (!dat.mGood)
michael@0	9410	return false;
michael@0	9411
michael@0	9412	aValue.SetStringValue(dat.mFamilyName, eCSSUnit_String);
michael@0	9413	return true;
michael@0	9414	}
michael@0	9415
michael@0	9416	case eCSSFontDesc_Style:
michael@0	9417	// property is VARIANT_HMK|VARIANT_SYSFONT
michael@0	9418	return ParseVariant(aValue, VARIANT_KEYWORD | VARIANT_NORMAL,
michael@0	9419	nsCSSProps::kFontStyleKTable);
michael@0	9420
michael@0	9421	case eCSSFontDesc_Weight:
michael@0	9422	return (ParseFontWeight(aValue) &&
michael@0	9423	aValue.GetUnit() != eCSSUnit_Inherit &&
michael@0	9424	aValue.GetUnit() != eCSSUnit_Initial &&
michael@0	9425	aValue.GetUnit() != eCSSUnit_Unset &&
michael@0	9426	(aValue.GetUnit() != eCSSUnit_Enumerated ||
michael@0	9427	(aValue.GetIntValue() != NS_STYLE_FONT_WEIGHT_BOLDER &&
michael@0	9428	aValue.GetIntValue() != NS_STYLE_FONT_WEIGHT_LIGHTER)));
michael@0	9429
michael@0	9430	case eCSSFontDesc_Stretch:
michael@0	9431	// property is VARIANT_HK|VARIANT_SYSFONT
michael@0	9432	return ParseVariant(aValue, VARIANT_KEYWORD,
michael@0	9433	nsCSSProps::kFontStretchKTable);
michael@0	9434
michael@0	9435	// These two are unique to @font-face and have their own special grammar.
michael@0	9436	case eCSSFontDesc_Src:
michael@0	9437	return ParseFontSrc(aValue);
michael@0	9438
michael@0	9439	case eCSSFontDesc_UnicodeRange:
michael@0	9440	return ParseFontRanges(aValue);
michael@0	9441
michael@0	9442	case eCSSFontDesc_FontFeatureSettings:
michael@0	9443	return ParseFontFeatureSettings(aValue);
michael@0	9444
michael@0	9445	case eCSSFontDesc_FontLanguageOverride:
michael@0	9446	return ParseVariant(aValue, VARIANT_NORMAL | VARIANT_STRING, nullptr);
michael@0	9447
michael@0	9448	case eCSSFontDesc_UNKNOWN:
michael@0	9449	case eCSSFontDesc_COUNT:
michael@0	9450	NS_NOTREACHED("bad nsCSSFontDesc code");
michael@0	9451	}
michael@0	9452	// explicitly do NOT have a default case to let the compiler
michael@0	9453	// help find missing descriptors
michael@0	9454	return false;
michael@0	9455	}
michael@0	9456
michael@0	9457	void
michael@0	9458	CSSParserImpl::InitBoxPropsAsPhysical(const nsCSSProperty *aSourceProperties)
michael@0	9459	{
michael@0	9460	nsCSSValue physical(NS_BOXPROP_SOURCE_PHYSICAL, eCSSUnit_Enumerated);
michael@0	9461	for (const nsCSSProperty *prop = aSourceProperties;
michael@0	9462	*prop != eCSSProperty_UNKNOWN; ++prop) {
michael@0	9463	AppendValue(*prop, physical);
michael@0	9464	}
michael@0	9465	}
michael@0	9466
michael@0	9467	static nsCSSValue
michael@0	9468	BoxPositionMaskToCSSValue(int32_t aMask, bool isX)
michael@0	9469	{
michael@0	9470	int32_t val = NS_STYLE_BG_POSITION_CENTER;
michael@0	9471	if (isX) {
michael@0	9472	if (aMask & BG_LEFT) {
michael@0	9473	val = NS_STYLE_BG_POSITION_LEFT;
michael@0	9474	}
michael@0	9475	else if (aMask & BG_RIGHT) {
michael@0	9476	val = NS_STYLE_BG_POSITION_RIGHT;
michael@0	9477	}
michael@0	9478	}
michael@0	9479	else {
michael@0	9480	if (aMask & BG_TOP) {
michael@0	9481	val = NS_STYLE_BG_POSITION_TOP;
michael@0	9482	}
michael@0	9483	else if (aMask & BG_BOTTOM) {
michael@0	9484	val = NS_STYLE_BG_POSITION_BOTTOM;
michael@0	9485	}
michael@0	9486	}
michael@0	9487
michael@0	9488	return nsCSSValue(val, eCSSUnit_Enumerated);
michael@0	9489	}
michael@0	9490
michael@0	9491	bool
michael@0	9492	CSSParserImpl::ParseBackground()
michael@0	9493	{
michael@0	9494	nsAutoParseCompoundProperty compound(this);
michael@0	9495
michael@0	9496	// background-color can only be set once, so it's not a list.
michael@0	9497	nsCSSValue color;
michael@0	9498
michael@0	9499	// Check first for inherit/initial/unset.
michael@0	9500	if (ParseVariant(color, VARIANT_INHERIT, nullptr)) {
michael@0	9501	// must be alone
michael@0	9502	for (const nsCSSProperty* subprops =
michael@0	9503	nsCSSProps::SubpropertyEntryFor(eCSSProperty_background);
michael@0	9504	*subprops != eCSSProperty_UNKNOWN; ++subprops) {
michael@0	9505	AppendValue(*subprops, color);
michael@0	9506	}
michael@0	9507	return true;
michael@0	9508	}
michael@0	9509
michael@0	9510	nsCSSValue image, repeat, attachment, clip, origin, position, size;
michael@0	9511	BackgroundParseState state(color, image.SetListValue(),
michael@0	9512	repeat.SetPairListValue(),
michael@0	9513	attachment.SetListValue(), clip.SetListValue(),
michael@0	9514	origin.SetListValue(), position.SetListValue(),
michael@0	9515	size.SetPairListValue());
michael@0	9516
michael@0	9517	for (;;) {
michael@0	9518	if (!ParseBackgroundItem(state)) {
michael@0	9519	return false;
michael@0	9520	}
michael@0	9521	// If we saw a color, this must be the last item.
michael@0	9522	if (color.GetUnit() != eCSSUnit_Null) {
michael@0	9523	break;
michael@0	9524	}
michael@0	9525	// If there's a comma, expect another item.
michael@0	9526	if (!ExpectSymbol(',', true)) {
michael@0	9527	break;
michael@0	9528	}
michael@0	9529	// Chain another entry on all the lists.
michael@0	9530	state.mImage->mNext = new nsCSSValueList;
michael@0	9531	state.mImage = state.mImage->mNext;
michael@0	9532	state.mRepeat->mNext = new nsCSSValuePairList;
michael@0	9533	state.mRepeat = state.mRepeat->mNext;
michael@0	9534	state.mAttachment->mNext = new nsCSSValueList;
michael@0	9535	state.mAttachment = state.mAttachment->mNext;
michael@0	9536	state.mClip->mNext = new nsCSSValueList;
michael@0	9537	state.mClip = state.mClip->mNext;
michael@0	9538	state.mOrigin->mNext = new nsCSSValueList;
michael@0	9539	state.mOrigin = state.mOrigin->mNext;
michael@0	9540	state.mPosition->mNext = new nsCSSValueList;
michael@0	9541	state.mPosition = state.mPosition->mNext;
michael@0	9542	state.mSize->mNext = new nsCSSValuePairList;
michael@0	9543	state.mSize = state.mSize->mNext;
michael@0	9544	}
michael@0	9545
michael@0	9546	// If we get to this point without seeing a color, provide a default.
michael@0	9547	if (color.GetUnit() == eCSSUnit_Null) {
michael@0	9548	color.SetIntegerColorValue(NS_RGBA(0,0,0,0), eCSSUnit_RGBAColor);
michael@0	9549	}
michael@0	9550
michael@0	9551	AppendValue(eCSSProperty_background_image, image);
michael@0	9552	AppendValue(eCSSProperty_background_repeat, repeat);
michael@0	9553	AppendValue(eCSSProperty_background_attachment, attachment);
michael@0	9554	AppendValue(eCSSProperty_background_clip, clip);
michael@0	9555	AppendValue(eCSSProperty_background_origin, origin);
michael@0	9556	AppendValue(eCSSProperty_background_position, position);
michael@0	9557	AppendValue(eCSSProperty_background_size, size);
michael@0	9558	AppendValue(eCSSProperty_background_color, color);
michael@0	9559	return true;
michael@0	9560	}
michael@0	9561
michael@0	9562	// Parse one item of the background shorthand property.
michael@0	9563	bool
michael@0	9564	CSSParserImpl::ParseBackgroundItem(CSSParserImpl::BackgroundParseState& aState)
michael@0	9565
michael@0	9566	{
michael@0	9567	// Fill in the values that the shorthand will set if we don't find
michael@0	9568	// other values.
michael@0	9569	aState.mImage->mValue.SetNoneValue();
michael@0	9570	aState.mRepeat->mXValue.SetIntValue(NS_STYLE_BG_REPEAT_REPEAT,
michael@0	9571	eCSSUnit_Enumerated);
michael@0	9572	aState.mRepeat->mYValue.Reset();
michael@0	9573	aState.mAttachment->mValue.SetIntValue(NS_STYLE_BG_ATTACHMENT_SCROLL,
michael@0	9574	eCSSUnit_Enumerated);
michael@0	9575	aState.mClip->mValue.SetIntValue(NS_STYLE_BG_CLIP_BORDER,
michael@0	9576	eCSSUnit_Enumerated);
michael@0	9577	aState.mOrigin->mValue.SetIntValue(NS_STYLE_BG_ORIGIN_PADDING,
michael@0	9578	eCSSUnit_Enumerated);
michael@0	9579	nsRefPtr<nsCSSValue::Array> positionArr = nsCSSValue::Array::Create(4);
michael@0	9580	aState.mPosition->mValue.SetArrayValue(positionArr, eCSSUnit_Array);
michael@0	9581	positionArr->Item(1).SetPercentValue(0.0f);
michael@0	9582	positionArr->Item(3).SetPercentValue(0.0f);
michael@0	9583	aState.mSize->mXValue.SetAutoValue();
michael@0	9584	aState.mSize->mYValue.SetAutoValue();
michael@0	9585
michael@0	9586	bool haveColor = false,
michael@0	9587	haveImage = false,
michael@0	9588	haveRepeat = false,
michael@0	9589	haveAttach = false,
michael@0	9590	havePositionAndSize = false,
michael@0	9591	haveOrigin = false,
michael@0	9592	haveSomething = false;
michael@0	9593
michael@0	9594	while (GetToken(true)) {
michael@0	9595	nsCSSTokenType tt = mToken.mType;
michael@0	9596	UngetToken(); // ...but we'll still cheat and use mToken
michael@0	9597	if (tt == eCSSToken_Symbol) {
michael@0	9598	// ExpectEndProperty only looks for symbols, and nothing else will
michael@0	9599	// show up as one.
michael@0	9600	break;
michael@0	9601	}
michael@0	9602
michael@0	9603	if (tt == eCSSToken_Ident) {
michael@0	9604	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
michael@0	9605	int32_t dummy;
michael@0	9606	if (keyword == eCSSKeyword_inherit ||
michael@0	9607	keyword == eCSSKeyword_initial ||
michael@0	9608	keyword == eCSSKeyword_unset) {
michael@0	9609	return false;
michael@0	9610	} else if (keyword == eCSSKeyword_none) {
michael@0	9611	if (haveImage)
michael@0	9612	return false;
michael@0	9613	haveImage = true;
michael@0	9614	if (!ParseSingleValueProperty(aState.mImage->mValue,
michael@0	9615	eCSSProperty_background_image)) {
michael@0	9616	NS_NOTREACHED("should be able to parse");
michael@0	9617	return false;
michael@0	9618	}
michael@0	9619	} else if (nsCSSProps::FindKeyword(keyword,
michael@0	9620	nsCSSProps::kBackgroundAttachmentKTable, dummy)) {
michael@0	9621	if (haveAttach)
michael@0	9622	return false;
michael@0	9623	haveAttach = true;
michael@0	9624	if (!ParseSingleValueProperty(aState.mAttachment->mValue,
michael@0	9625	eCSSProperty_background_attachment)) {
michael@0	9626	NS_NOTREACHED("should be able to parse");
michael@0	9627	return false;
michael@0	9628	}
michael@0	9629	} else if (nsCSSProps::FindKeyword(keyword,
michael@0	9630	nsCSSProps::kBackgroundRepeatKTable, dummy)) {
michael@0	9631	if (haveRepeat)
michael@0	9632	return false;
michael@0	9633	haveRepeat = true;
michael@0	9634	nsCSSValuePair scratch;
michael@0	9635	if (!ParseBackgroundRepeatValues(scratch)) {
michael@0	9636	NS_NOTREACHED("should be able to parse");
michael@0	9637	return false;
michael@0	9638	}
michael@0	9639	aState.mRepeat->mXValue = scratch.mXValue;
michael@0	9640	aState.mRepeat->mYValue = scratch.mYValue;
michael@0	9641	} else if (nsCSSProps::FindKeyword(keyword,
michael@0	9642	nsCSSProps::kBackgroundPositionKTable, dummy)) {
michael@0	9643	if (havePositionAndSize)
michael@0	9644	return false;
michael@0	9645	havePositionAndSize = true;
michael@0	9646	if (!ParseBackgroundPositionValues(aState.mPosition->mValue, false)) {
michael@0	9647	return false;
michael@0	9648	}
michael@0	9649	if (ExpectSymbol('/', true)) {
michael@0	9650	nsCSSValuePair scratch;
michael@0	9651	if (!ParseBackgroundSizeValues(scratch)) {
michael@0	9652	return false;
michael@0	9653	}
michael@0	9654	aState.mSize->mXValue = scratch.mXValue;
michael@0	9655	aState.mSize->mYValue = scratch.mYValue;
michael@0	9656	}
michael@0	9657	} else if (nsCSSProps::FindKeyword(keyword,
michael@0	9658	nsCSSProps::kBackgroundOriginKTable, dummy)) {
michael@0	9659	if (haveOrigin)
michael@0	9660	return false;
michael@0	9661	haveOrigin = true;
michael@0	9662	if (!ParseSingleValueProperty(aState.mOrigin->mValue,
michael@0	9663	eCSSProperty_background_origin)) {
michael@0	9664	NS_NOTREACHED("should be able to parse");
michael@0	9665	return false;
michael@0	9666	}
michael@0	9667
michael@0	9668	// The spec allows a second box value (for background-clip),
michael@0	9669	// immediately following the first one (for background-origin).
michael@0	9670
michael@0	9671	// 'background-clip' and 'background-origin' use the same keyword table
michael@0	9672	MOZ_ASSERT(nsCSSProps::kKeywordTableTable[
michael@0	9673	eCSSProperty_background_origin] ==
michael@0	9674	nsCSSProps::kBackgroundOriginKTable);
michael@0	9675	MOZ_ASSERT(nsCSSProps::kKeywordTableTable[
michael@0	9676	eCSSProperty_background_clip] ==
michael@0	9677	nsCSSProps::kBackgroundOriginKTable);
michael@0	9678	static_assert(NS_STYLE_BG_CLIP_BORDER ==
michael@0	9679	NS_STYLE_BG_ORIGIN_BORDER &&
michael@0	9680	NS_STYLE_BG_CLIP_PADDING ==
michael@0	9681	NS_STYLE_BG_ORIGIN_PADDING &&
michael@0	9682	NS_STYLE_BG_CLIP_CONTENT ==
michael@0	9683	NS_STYLE_BG_ORIGIN_CONTENT,
michael@0	9684	"bg-clip and bg-origin style constants must agree");
michael@0	9685
michael@0	9686	if (!ParseSingleValueProperty(aState.mClip->mValue,
michael@0	9687	eCSSProperty_background_clip)) {
michael@0	9688	// When exactly one <box> value is set, it is used for both
michael@0	9689	// 'background-origin' and 'background-clip'.
michael@0	9690	// See assertions above showing these values are compatible.
michael@0	9691	aState.mClip->mValue = aState.mOrigin->mValue;
michael@0	9692	}
michael@0	9693	} else {
michael@0	9694	if (haveColor)
michael@0	9695	return false;
michael@0	9696	haveColor = true;
michael@0	9697	if (!ParseSingleValueProperty(aState.mColor,
michael@0	9698	eCSSProperty_background_color)) {
michael@0	9699	return false;
michael@0	9700	}
michael@0	9701	}
michael@0	9702	} else if (tt == eCSSToken_URL ||
michael@0	9703	(tt == eCSSToken_Function &&
michael@0	9704	(mToken.mIdent.LowerCaseEqualsLiteral("linear-gradient") ||
michael@0	9705	mToken.mIdent.LowerCaseEqualsLiteral("radial-gradient") ||
michael@0	9706	mToken.mIdent.LowerCaseEqualsLiteral("repeating-linear-gradient") ||
michael@0	9707	mToken.mIdent.LowerCaseEqualsLiteral("repeating-radial-gradient") ||
michael@0	9708	mToken.mIdent.LowerCaseEqualsLiteral("-moz-linear-gradient") ||
michael@0	9709	mToken.mIdent.LowerCaseEqualsLiteral("-moz-radial-gradient") ||
michael@0	9710	mToken.mIdent.LowerCaseEqualsLiteral("-moz-repeating-linear-gradient") ||
michael@0	9711	mToken.mIdent.LowerCaseEqualsLiteral("-moz-repeating-radial-gradient") ||
michael@0	9712	mToken.mIdent.LowerCaseEqualsLiteral("-moz-image-rect") ||
michael@0	9713	mToken.mIdent.LowerCaseEqualsLiteral("-moz-element")))) {
michael@0	9714	if (haveImage)
michael@0	9715	return false;
michael@0	9716	haveImage = true;
michael@0	9717	if (!ParseSingleValueProperty(aState.mImage->mValue,
michael@0	9718	eCSSProperty_background_image)) {
michael@0	9719	return false;
michael@0	9720	}
michael@0	9721	} else if (tt == eCSSToken_Dimension ||
michael@0	9722	tt == eCSSToken_Number ||
michael@0	9723	tt == eCSSToken_Percentage ||
michael@0	9724	(tt == eCSSToken_Function &&
michael@0	9725	(mToken.mIdent.LowerCaseEqualsLiteral("calc") ||
michael@0	9726	mToken.mIdent.LowerCaseEqualsLiteral("-moz-calc")))) {
michael@0	9727	if (havePositionAndSize)
michael@0	9728	return false;
michael@0	9729	havePositionAndSize = true;
michael@0	9730	if (!ParseBackgroundPositionValues(aState.mPosition->mValue, false)) {
michael@0	9731	return false;
michael@0	9732	}
michael@0	9733	if (ExpectSymbol('/', true)) {
michael@0	9734	nsCSSValuePair scratch;
michael@0	9735	if (!ParseBackgroundSizeValues(scratch)) {
michael@0	9736	return false;
michael@0	9737	}
michael@0	9738	aState.mSize->mXValue = scratch.mXValue;
michael@0	9739	aState.mSize->mYValue = scratch.mYValue;
michael@0	9740	}
michael@0	9741	} else {
michael@0	9742	if (haveColor)
michael@0	9743	return false;
michael@0	9744	haveColor = true;
michael@0	9745	// Note: This parses 'inherit', 'initial' and 'unset', but
michael@0	9746	// we've already checked for them, so it's ok.
michael@0	9747	if (!ParseSingleValueProperty(aState.mColor,
michael@0	9748	eCSSProperty_background_color)) {
michael@0	9749	return false;
michael@0	9750	}
michael@0	9751	}
michael@0	9752	haveSomething = true;
michael@0	9753	}
michael@0	9754
michael@0	9755	return haveSomething;
michael@0	9756	}
michael@0	9757
michael@0	9758	// This function is very similar to ParseBackgroundPosition and
michael@0	9759	// ParseBackgroundSize.
michael@0	9760	bool
michael@0	9761	CSSParserImpl::ParseValueList(nsCSSProperty aPropID)
michael@0	9762	{
michael@0	9763	// aPropID is a single value prop-id
michael@0	9764	nsCSSValue value;
michael@0	9765	// 'initial', 'inherit' and 'unset' stand alone, no list permitted.
michael@0	9766	if (!ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	9767	nsCSSValueList* item = value.SetListValue();
michael@0	9768	for (;;) {
michael@0	9769	if (!ParseSingleValueProperty(item->mValue, aPropID)) {
michael@0	9770	return false;
michael@0	9771	}
michael@0	9772	if (!ExpectSymbol(',', true)) {
michael@0	9773	break;
michael@0	9774	}
michael@0	9775	item->mNext = new nsCSSValueList;
michael@0	9776	item = item->mNext;
michael@0	9777	}
michael@0	9778	}
michael@0	9779	AppendValue(aPropID, value);
michael@0	9780	return true;
michael@0	9781	}
michael@0	9782
michael@0	9783	bool
michael@0	9784	CSSParserImpl::ParseBackgroundRepeat()
michael@0	9785	{
michael@0	9786	nsCSSValue value;
michael@0	9787	// 'initial', 'inherit' and 'unset' stand alone, no list permitted.
michael@0	9788	if (!ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	9789	nsCSSValuePair valuePair;
michael@0	9790	if (!ParseBackgroundRepeatValues(valuePair)) {
michael@0	9791	return false;
michael@0	9792	}
michael@0	9793	nsCSSValuePairList* item = value.SetPairListValue();
michael@0	9794	for (;;) {
michael@0	9795	item->mXValue = valuePair.mXValue;
michael@0	9796	item->mYValue = valuePair.mYValue;
michael@0	9797	if (!ExpectSymbol(',', true)) {
michael@0	9798	break;
michael@0	9799	}
michael@0	9800	if (!ParseBackgroundRepeatValues(valuePair)) {
michael@0	9801	return false;
michael@0	9802	}
michael@0	9803	item->mNext = new nsCSSValuePairList;
michael@0	9804	item = item->mNext;
michael@0	9805	}
michael@0	9806	}
michael@0	9807
michael@0	9808	AppendValue(eCSSProperty_background_repeat, value);
michael@0	9809	return true;
michael@0	9810	}
michael@0	9811
michael@0	9812	bool
michael@0	9813	CSSParserImpl::ParseBackgroundRepeatValues(nsCSSValuePair& aValue)
michael@0	9814	{
michael@0	9815	nsCSSValue& xValue = aValue.mXValue;
michael@0	9816	nsCSSValue& yValue = aValue.mYValue;
michael@0	9817
michael@0	9818	if (ParseEnum(xValue, nsCSSProps::kBackgroundRepeatKTable)) {
michael@0	9819	int32_t value = xValue.GetIntValue();
michael@0	9820	// For single values set yValue as eCSSUnit_Null.
michael@0	9821	if (value == NS_STYLE_BG_REPEAT_REPEAT_X ||
michael@0	9822	value == NS_STYLE_BG_REPEAT_REPEAT_Y ||
michael@0	9823	!ParseEnum(yValue, nsCSSProps::kBackgroundRepeatPartKTable)) {
michael@0	9824	// the caller will fail cases like "repeat-x no-repeat"
michael@0	9825	// by expecting a list separator or an end property.
michael@0	9826	yValue.Reset();
michael@0	9827	}
michael@0	9828	return true;
michael@0	9829	}
michael@0	9830
michael@0	9831	return false;
michael@0	9832	}
michael@0	9833
michael@0	9834	// This function is very similar to ParseBackgroundList and ParseBackgroundSize.
michael@0	9835	bool
michael@0	9836	CSSParserImpl::ParseBackgroundPosition()
michael@0	9837	{
michael@0	9838	nsCSSValue value;
michael@0	9839	// 'initial', 'inherit' and 'unset' stand alone, no list permitted.
michael@0	9840	if (!ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	9841	nsCSSValue itemValue;
michael@0	9842	if (!ParseBackgroundPositionValues(itemValue, false)) {
michael@0	9843	return false;
michael@0	9844	}
michael@0	9845	nsCSSValueList* item = value.SetListValue();
michael@0	9846	for (;;) {
michael@0	9847	item->mValue = itemValue;
michael@0	9848	if (!ExpectSymbol(',', true)) {
michael@0	9849	break;
michael@0	9850	}
michael@0	9851	if (!ParseBackgroundPositionValues(itemValue, false)) {
michael@0	9852	return false;
michael@0	9853	}
michael@0	9854	item->mNext = new nsCSSValueList;
michael@0	9855	item = item->mNext;
michael@0	9856	}
michael@0	9857	}
michael@0	9858	AppendValue(eCSSProperty_background_position, value);
michael@0	9859	return true;
michael@0	9860	}
michael@0	9861
michael@0	9862	/**
michael@0	9863	* BoxPositionMaskToCSSValue and ParseBoxPositionValues are used
michael@0	9864	* for parsing the CSS 2.1 background-position syntax (which has at
michael@0	9865	* most two values). (Compare to the css3-background syntax which
michael@0	9866	* takes up to four values.) Some current CSS specifications that
michael@0	9867	* use background-position-like syntax still use this old syntax.
michael@0	9868	**
michael@0	9869	* Parses two values that correspond to positions in a box. These can be
michael@0	9870	* values corresponding to percentages of the box, raw offsets, or keywords
michael@0	9871	* like "top," "left center," etc.
michael@0	9872	*
michael@0	9873	* @param aOut The nsCSSValuePair in which to place the result.
michael@0	9874	* @param aAcceptsInherit If true, 'inherit', 'initial' and 'unset' are
michael@0	9875	* legal values
michael@0	9876	* @param aAllowExplicitCenter If true, 'center' is a legal value
michael@0	9877	* @return Whether or not the operation succeeded.
michael@0	9878	*/
michael@0	9879	bool CSSParserImpl::ParseBoxPositionValues(nsCSSValuePair &aOut,
michael@0	9880	bool aAcceptsInherit,
michael@0	9881	bool aAllowExplicitCenter)
michael@0	9882	{
michael@0	9883	// First try a percentage or a length value
michael@0	9884	nsCSSValue &xValue = aOut.mXValue,
michael@0	9885	&yValue = aOut.mYValue;
michael@0	9886	int32_t variantMask =
michael@0	9887	(aAcceptsInherit ? VARIANT_INHERIT : 0) | VARIANT_LP | VARIANT_CALC;
michael@0	9888	if (ParseVariant(xValue, variantMask, nullptr)) {
michael@0	9889	if (eCSSUnit_Inherit == xValue.GetUnit() ||
michael@0	9890	eCSSUnit_Initial == xValue.GetUnit() ||
michael@0	9891	eCSSUnit_Unset == xValue.GetUnit()) { // both are inherit, initial or unset
michael@0	9892	yValue = xValue;
michael@0	9893	return true;
michael@0	9894	}
michael@0	9895	// We have one percentage/length/calc. Get the optional second
michael@0	9896	// percentage/length/calc/keyword.
michael@0	9897	if (ParseVariant(yValue, VARIANT_LP | VARIANT_CALC, nullptr)) {
michael@0	9898	// We have two numbers
michael@0	9899	return true;
michael@0	9900	}
michael@0	9901
michael@0	9902	if (ParseEnum(yValue, nsCSSProps::kBackgroundPositionKTable)) {
michael@0	9903	int32_t yVal = yValue.GetIntValue();
michael@0	9904	if (!(yVal & BG_CTB)) {
michael@0	9905	// The second keyword can only be 'center', 'top', or 'bottom'
michael@0	9906	return false;
michael@0	9907	}
michael@0	9908	yValue = BoxPositionMaskToCSSValue(yVal, false);
michael@0	9909	return true;
michael@0	9910	}
michael@0	9911
michael@0	9912	// If only one percentage or length value is given, it sets the
michael@0	9913	// horizontal position only, and the vertical position will be 50%.
michael@0	9914	yValue.SetPercentValue(0.5f);
michael@0	9915	return true;
michael@0	9916	}
michael@0	9917
michael@0	9918	// Now try keywords. We do this manually to allow for the first
michael@0	9919	// appearance of "center" to apply to the either the x or y
michael@0	9920	// position (it's ambiguous so we have to disambiguate). Each
michael@0	9921	// allowed keyword value is assigned it's own bit. We don't allow
michael@0	9922	// any duplicate keywords other than center. We try to get two
michael@0	9923	// keywords but it's okay if there is only one.
michael@0	9924	int32_t mask = 0;
michael@0	9925	if (ParseEnum(xValue, nsCSSProps::kBackgroundPositionKTable)) {
michael@0	9926	int32_t bit = xValue.GetIntValue();
michael@0	9927	mask |= bit;
michael@0	9928	if (ParseEnum(xValue, nsCSSProps::kBackgroundPositionKTable)) {
michael@0	9929	bit = xValue.GetIntValue();
michael@0	9930	if (mask & (bit & ~BG_CENTER)) {
michael@0	9931	// Only the 'center' keyword can be duplicated.
michael@0	9932	return false;
michael@0	9933	}
michael@0	9934	mask |= bit;
michael@0	9935	}
michael@0	9936	else {
michael@0	9937	// Only one keyword. See if we have a length, percentage, or calc.
michael@0	9938	if (ParseVariant(yValue, VARIANT_LP | VARIANT_CALC, nullptr)) {
michael@0	9939	if (!(mask & BG_CLR)) {
michael@0	9940	// The first keyword can only be 'center', 'left', or 'right'
michael@0	9941	return false;
michael@0	9942	}
michael@0	9943
michael@0	9944	xValue = BoxPositionMaskToCSSValue(mask, true);
michael@0	9945	return true;
michael@0	9946	}
michael@0	9947	}
michael@0	9948	}
michael@0	9949
michael@0	9950	// Check for bad input. Bad input consists of no matching keywords,
michael@0	9951	// or pairs of x keywords or pairs of y keywords.
michael@0	9952	if ((mask == 0) || (mask == (BG_TOP | BG_BOTTOM)) ||
michael@0	9953	(mask == (BG_LEFT | BG_RIGHT)) ||
michael@0	9954	(!aAllowExplicitCenter && (mask & BG_CENTER))) {
michael@0	9955	return false;
michael@0	9956	}
michael@0	9957
michael@0	9958	// Create style values
michael@0	9959	xValue = BoxPositionMaskToCSSValue(mask, true);
michael@0	9960	yValue = BoxPositionMaskToCSSValue(mask, false);
michael@0	9961	return true;
michael@0	9962	}
michael@0	9963
michael@0	9964	bool CSSParserImpl::ParseBackgroundPositionValues(nsCSSValue& aOut,
michael@0	9965	bool aAcceptsInherit)
michael@0	9966	{
michael@0	9967	// css3-background allows positions to be defined as offsets
michael@0	9968	// from an edge. There can be 2 keywords and 2 offsets given. These
michael@0	9969	// four 'values' are stored in an array in the following order:
michael@0	9970	// [keyword offset keyword offset]. If a keyword or offset isn't
michael@0	9971	// parsed the value of the corresponding array element is set
michael@0	9972	// to eCSSUnit_Null by a call to nsCSSValue::Reset().
michael@0	9973	if (aAcceptsInherit && ParseVariant(aOut, VARIANT_INHERIT, nullptr)) {
michael@0	9974	return true;
michael@0	9975	}
michael@0	9976
michael@0	9977	nsRefPtr<nsCSSValue::Array> value = nsCSSValue::Array::Create(4);
michael@0	9978	aOut.SetArrayValue(value, eCSSUnit_Array);
michael@0	9979
michael@0	9980	// The following clarifies organisation of the array.
michael@0	9981	nsCSSValue &xEdge = value->Item(0),
michael@0	9982	&xOffset = value->Item(1),
michael@0	9983	&yEdge = value->Item(2),
michael@0	9984	&yOffset = value->Item(3);
michael@0	9985
michael@0	9986	// Parse all the values into the array.
michael@0	9987	uint32_t valueCount = 0;
michael@0	9988	for (int32_t i = 0; i < 4; i++) {
michael@0	9989	if (!ParseVariant(value->Item(i), VARIANT_LPCALC | VARIANT_KEYWORD,
michael@0	9990	nsCSSProps::kBackgroundPositionKTable)) {
michael@0	9991	break;
michael@0	9992	}
michael@0	9993	++valueCount;
michael@0	9994	}
michael@0	9995
michael@0	9996	switch (valueCount) {
michael@0	9997	case 4:
michael@0	9998	// "If three or four values are given, then each <percentage> or <length>
michael@0	9999	// represents an offset and must be preceded by a keyword, which specifies
michael@0	10000	// from which edge the offset is given."
michael@0	10001	if (eCSSUnit_Enumerated != xEdge.GetUnit() ||
michael@0	10002	BG_CENTER == xEdge.GetIntValue() ||
michael@0	10003	eCSSUnit_Enumerated == xOffset.GetUnit() ||
michael@0	10004	eCSSUnit_Enumerated != yEdge.GetUnit() ||
michael@0	10005	BG_CENTER == yEdge.GetIntValue() ||
michael@0	10006	eCSSUnit_Enumerated == yOffset.GetUnit()) {
michael@0	10007	return false;
michael@0	10008	}
michael@0	10009	break;
michael@0	10010	case 3:
michael@0	10011	// "If three or four values are given, then each <percentage> or<length>
michael@0	10012	// represents an offset and must be preceded by a keyword, which specifies
michael@0	10013	// from which edge the offset is given." ... "If three values are given,
michael@0	10014	// the missing offset is assumed to be zero."
michael@0	10015	if (eCSSUnit_Enumerated != value->Item(1).GetUnit()) {
michael@0	10016	// keyword offset keyword
michael@0	10017	// Second value is non-keyword, thus first value must be a non-center
michael@0	10018	// keyword.
michael@0	10019	if (eCSSUnit_Enumerated != value->Item(0).GetUnit() ||
michael@0	10020	BG_CENTER == value->Item(0).GetIntValue()) {
michael@0	10021	return false;
michael@0	10022	}
michael@0	10023
michael@0	10024	// Remaining value must be a keyword.
michael@0	10025	if (eCSSUnit_Enumerated != value->Item(2).GetUnit()) {
michael@0	10026	return false;
michael@0	10027	}
michael@0	10028
michael@0	10029	yOffset.Reset(); // Everything else is in the correct position.
michael@0	10030	} else if (eCSSUnit_Enumerated != value->Item(2).GetUnit()) {
michael@0	10031	// keyword keyword offset
michael@0	10032	// Third value is non-keyword, thus second value must be non-center
michael@0	10033	// keyword.
michael@0	10034	if (BG_CENTER == value->Item(1).GetIntValue()) {
michael@0	10035	return false;
michael@0	10036	}
michael@0	10037
michael@0	10038	// Remaining value must be a keyword.
michael@0	10039	if (eCSSUnit_Enumerated != value->Item(0).GetUnit()) {
michael@0	10040	return false;
michael@0	10041	}
michael@0	10042
michael@0	10043	// Move the values to the correct position in the array.
michael@0	10044	value->Item(3) = value->Item(2); // yOffset
michael@0	10045	value->Item(2) = value->Item(1); // yEdge
michael@0	10046	value->Item(1).Reset(); // xOffset
michael@0	10047	} else {
michael@0	10048	return false;
michael@0	10049	}
michael@0	10050	break;
michael@0	10051	case 2:
michael@0	10052	// "If two values are given and at least one value is not a keyword, then
michael@0	10053	// the first value represents the horizontal position (or offset) and the
michael@0	10054	// second represents the vertical position (or offset)"
michael@0	10055	if (eCSSUnit_Enumerated == value->Item(0).GetUnit()) {
michael@0	10056	if (eCSSUnit_Enumerated == value->Item(1).GetUnit()) {
michael@0	10057	// keyword keyword
michael@0	10058	value->Item(2) = value->Item(1); // move yEdge to correct position
michael@0	10059	xOffset.Reset();
michael@0	10060	yOffset.Reset();
michael@0	10061	} else {
michael@0	10062	// keyword offset
michael@0	10063	// First value must represent horizontal position.
michael@0	10064	if ((BG_TOP | BG_BOTTOM) & value->Item(0).GetIntValue()) {
michael@0	10065	return false;
michael@0	10066	}
michael@0	10067	value->Item(3) = value->Item(1); // move yOffset to correct position
michael@0	10068	xOffset.Reset();
michael@0	10069	yEdge.Reset();
michael@0	10070	}
michael@0	10071	} else {
michael@0	10072	if (eCSSUnit_Enumerated == value->Item(1).GetUnit()) {
michael@0	10073	// offset keyword
michael@0	10074	// Second value must represent vertical position.
michael@0	10075	if ((BG_LEFT | BG_RIGHT) & value->Item(1).GetIntValue()) {
michael@0	10076	return false;
michael@0	10077	}
michael@0	10078	value->Item(2) = value->Item(1); // move yEdge to correct position
michael@0	10079	value->Item(1) = value->Item(0); // move xOffset to correct position
michael@0	10080	xEdge.Reset();
michael@0	10081	yOffset.Reset();
michael@0	10082	} else {
michael@0	10083	// offset offset
michael@0	10084	value->Item(3) = value->Item(1); // move yOffset to correct position
michael@0	10085	value->Item(1) = value->Item(0); // move xOffset to correct position
michael@0	10086	xEdge.Reset();
michael@0	10087	yEdge.Reset();
michael@0	10088	}
michael@0	10089	}
michael@0	10090	break;
michael@0	10091	case 1:
michael@0	10092	// "If only one value is specified, the second value is assumed to be
michael@0	10093	// center."
michael@0	10094	if (eCSSUnit_Enumerated == value->Item(0).GetUnit()) {
michael@0	10095	xOffset.Reset();
michael@0	10096	} else {
michael@0	10097	value->Item(1) = value->Item(0); // move xOffset to correct position
michael@0	10098	xEdge.Reset();
michael@0	10099	}
michael@0	10100	yEdge.SetIntValue(NS_STYLE_BG_POSITION_CENTER, eCSSUnit_Enumerated);
michael@0	10101	yOffset.Reset();
michael@0	10102	break;
michael@0	10103	default:
michael@0	10104	return false;
michael@0	10105	}
michael@0	10106
michael@0	10107	// For compatibility with CSS2.1 code the edges can be unspecified.
michael@0	10108	// Unspecified edges are recorded as nullptr.
michael@0	10109	NS_ASSERTION((eCSSUnit_Enumerated == xEdge.GetUnit() ||
michael@0	10110	eCSSUnit_Null == xEdge.GetUnit()) &&
michael@0	10111	(eCSSUnit_Enumerated == yEdge.GetUnit() ||
michael@0	10112	eCSSUnit_Null == yEdge.GetUnit()) &&
michael@0	10113	eCSSUnit_Enumerated != xOffset.GetUnit() &&
michael@0	10114	eCSSUnit_Enumerated != yOffset.GetUnit(),
michael@0	10115	"Unexpected units");
michael@0	10116
michael@0	10117	// Keywords in first and second pairs can not both be vertical or
michael@0	10118	// horizontal keywords. (eg. left right, bottom top). Additionally,
michael@0	10119	// non-center keyword can not be duplicated (eg. left left).
michael@0	10120	int32_t xEdgeEnum =
michael@0	10121	xEdge.GetUnit() == eCSSUnit_Enumerated ? xEdge.GetIntValue() : 0;
michael@0	10122	int32_t yEdgeEnum =
michael@0	10123	yEdge.GetUnit() == eCSSUnit_Enumerated ? yEdge.GetIntValue() : 0;
michael@0	10124	if ((xEdgeEnum | yEdgeEnum) == (BG_LEFT | BG_RIGHT) ||
michael@0	10125	(xEdgeEnum | yEdgeEnum) == (BG_TOP | BG_BOTTOM) ||
michael@0	10126	(xEdgeEnum & yEdgeEnum & ~BG_CENTER)) {
michael@0	10127	return false;
michael@0	10128	}
michael@0	10129
michael@0	10130	// The values could be in an order that is different than expected.
michael@0	10131	// eg. x contains vertical information, y contains horizontal information.
michael@0	10132	// Swap if incorrect order.
michael@0	10133	if (xEdgeEnum & (BG_TOP | BG_BOTTOM) ||
michael@0	10134	yEdgeEnum & (BG_LEFT | BG_RIGHT)) {
michael@0	10135	nsCSSValue swapEdge = xEdge;
michael@0	10136	nsCSSValue swapOffset = xOffset;
michael@0	10137	xEdge = yEdge;
michael@0	10138	xOffset = yOffset;
michael@0	10139	yEdge = swapEdge;
michael@0	10140	yOffset = swapOffset;
michael@0	10141	}
michael@0	10142
michael@0	10143	return true;
michael@0	10144	}
michael@0	10145
michael@0	10146	// This function is very similar to ParseBackgroundList and
michael@0	10147	// ParseBackgroundPosition.
michael@0	10148	bool
michael@0	10149	CSSParserImpl::ParseBackgroundSize()
michael@0	10150	{
michael@0	10151	nsCSSValue value;
michael@0	10152	// 'initial', 'inherit' and 'unset' stand alone, no list permitted.
michael@0	10153	if (!ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	10154	nsCSSValuePair valuePair;
michael@0	10155	if (!ParseBackgroundSizeValues(valuePair)) {
michael@0	10156	return false;
michael@0	10157	}
michael@0	10158	nsCSSValuePairList* item = value.SetPairListValue();
michael@0	10159	for (;;) {
michael@0	10160	item->mXValue = valuePair.mXValue;
michael@0	10161	item->mYValue = valuePair.mYValue;
michael@0	10162	if (!ExpectSymbol(',', true)) {
michael@0	10163	break;
michael@0	10164	}
michael@0	10165	if (!ParseBackgroundSizeValues(valuePair)) {
michael@0	10166	return false;
michael@0	10167	}
michael@0	10168	item->mNext = new nsCSSValuePairList;
michael@0	10169	item = item->mNext;
michael@0	10170	}
michael@0	10171	}
michael@0	10172	AppendValue(eCSSProperty_background_size, value);
michael@0	10173	return true;
michael@0	10174	}
michael@0	10175
michael@0	10176	/**
michael@0	10177	* Parses two values that correspond to lengths for the background-size
michael@0	10178	* property. These can be one or two lengths (or the 'auto' keyword) or
michael@0	10179	* percentages corresponding to the element's dimensions or the single keywords
michael@0	10180	* 'contain' or 'cover'. 'initial', 'inherit' and 'unset' must be handled by
michael@0	10181	* the caller if desired.
michael@0	10182	*
michael@0	10183	* @param aOut The nsCSSValuePair in which to place the result.
michael@0	10184	* @return Whether or not the operation succeeded.
michael@0	10185	*/
michael@0	10186	#define BG_SIZE_VARIANT (VARIANT_LP | VARIANT_AUTO | VARIANT_CALC)
michael@0	10187	bool CSSParserImpl::ParseBackgroundSizeValues(nsCSSValuePair &aOut)
michael@0	10188	{
michael@0	10189	// First try a percentage or a length value
michael@0	10190	nsCSSValue &xValue = aOut.mXValue,
michael@0	10191	&yValue = aOut.mYValue;
michael@0	10192	if (ParseNonNegativeVariant(xValue, BG_SIZE_VARIANT, nullptr)) {
michael@0	10193	// We have one percentage/length/calc/auto. Get the optional second
michael@0	10194	// percentage/length/calc/keyword.
michael@0	10195	if (ParseNonNegativeVariant(yValue, BG_SIZE_VARIANT, nullptr)) {
michael@0	10196	// We have a second percentage/length/calc/auto.
michael@0	10197	return true;
michael@0	10198	}
michael@0	10199
michael@0	10200	// If only one percentage or length value is given, it sets the
michael@0	10201	// horizontal size only, and the vertical size will be as if by 'auto'.
michael@0	10202	yValue.SetAutoValue();
michael@0	10203	return true;
michael@0	10204	}
michael@0	10205
michael@0	10206	// Now address 'contain' and 'cover'.
michael@0	10207	if (!ParseEnum(xValue, nsCSSProps::kBackgroundSizeKTable))
michael@0	10208	return false;
michael@0	10209	yValue.Reset();
michael@0	10210	return true;
michael@0	10211	}
michael@0	10212	#undef BG_SIZE_VARIANT
michael@0	10213
michael@0	10214	bool
michael@0	10215	CSSParserImpl::ParseBorderColor()
michael@0	10216	{
michael@0	10217	static const nsCSSProperty kBorderColorSources[] = {
michael@0	10218	eCSSProperty_border_left_color_ltr_source,
michael@0	10219	eCSSProperty_border_left_color_rtl_source,
michael@0	10220	eCSSProperty_border_right_color_ltr_source,
michael@0	10221	eCSSProperty_border_right_color_rtl_source,
michael@0	10222	eCSSProperty_UNKNOWN
michael@0	10223	};
michael@0	10224
michael@0	10225	// do this now, in case 4 values weren't specified
michael@0	10226	InitBoxPropsAsPhysical(kBorderColorSources);
michael@0	10227	return ParseBoxProperties(kBorderColorIDs);
michael@0	10228	}
michael@0	10229
michael@0	10230	void
michael@0	10231	CSSParserImpl::SetBorderImageInitialValues()
michael@0	10232	{
michael@0	10233	// border-image-source: none
michael@0	10234	nsCSSValue source;
michael@0	10235	source.SetNoneValue();
michael@0	10236	AppendValue(eCSSProperty_border_image_source, source);
michael@0	10237
michael@0	10238	// border-image-slice: 100%
michael@0	10239	nsCSSValue sliceBoxValue;
michael@0	10240	nsCSSRect& sliceBox = sliceBoxValue.SetRectValue();
michael@0	10241	sliceBox.SetAllSidesTo(nsCSSValue(1.0f, eCSSUnit_Percent));
michael@0	10242	nsCSSValue slice;
michael@0	10243	nsCSSValueList* sliceList = slice.SetListValue();
michael@0	10244	sliceList->mValue = sliceBoxValue;
michael@0	10245	AppendValue(eCSSProperty_border_image_slice, slice);
michael@0	10246
michael@0	10247	// border-image-width: 1
michael@0	10248	nsCSSValue width;
michael@0	10249	nsCSSRect& widthBox = width.SetRectValue();
michael@0	10250	widthBox.SetAllSidesTo(nsCSSValue(1.0f, eCSSUnit_Number));
michael@0	10251	AppendValue(eCSSProperty_border_image_width, width);
michael@0	10252
michael@0	10253	// border-image-outset: 0
michael@0	10254	nsCSSValue outset;
michael@0	10255	nsCSSRect& outsetBox = outset.SetRectValue();
michael@0	10256	outsetBox.SetAllSidesTo(nsCSSValue(0.0f, eCSSUnit_Number));
michael@0	10257	AppendValue(eCSSProperty_border_image_outset, outset);
michael@0	10258
michael@0	10259	// border-image-repeat: repeat
michael@0	10260	nsCSSValue repeat;
michael@0	10261	nsCSSValuePair repeatPair;
michael@0	10262	repeatPair.SetBothValuesTo(nsCSSValue(NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH,
michael@0	10263	eCSSUnit_Enumerated));
michael@0	10264	repeat.SetPairValue(&repeatPair);
michael@0	10265	AppendValue(eCSSProperty_border_image_repeat, repeat);
michael@0	10266	}
michael@0	10267
michael@0	10268	bool
michael@0	10269	CSSParserImpl::ParseBorderImageSlice(bool aAcceptsInherit,
michael@0	10270	bool* aConsumedTokens)
michael@0	10271	{
michael@0	10272	// border-image-slice: initial | [<number>|<percentage>]{1,4} && fill?
michael@0	10273	nsCSSValue value;
michael@0	10274
michael@0	10275	if (aConsumedTokens) {
michael@0	10276	*aConsumedTokens = true;
michael@0	10277	}
michael@0	10278
michael@0	10279	if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	10280	// Keywords "inherit", "initial" and "unset" can not be mixed, so we
michael@0	10281	// are done.
michael@0	10282	AppendValue(eCSSProperty_border_image_slice, value);
michael@0	10283	return true;
michael@0	10284	}
michael@0	10285
michael@0	10286	// Try parsing "fill" value.
michael@0	10287	nsCSSValue imageSliceFillValue;
michael@0	10288	bool hasFill = ParseEnum(imageSliceFillValue,
michael@0	10289	nsCSSProps::kBorderImageSliceKTable);
michael@0	10290
michael@0	10291	// Parse the box dimensions.
michael@0	10292	nsCSSValue imageSliceBoxValue;
michael@0	10293	if (!ParseGroupedBoxProperty(VARIANT_PN, imageSliceBoxValue)) {
michael@0	10294	if (!hasFill && aConsumedTokens) {
michael@0	10295	*aConsumedTokens = false;
michael@0	10296	}
michael@0	10297
michael@0	10298	return false;
michael@0	10299	}
michael@0	10300
michael@0	10301	// Try parsing "fill" keyword again if the first time failed because keyword
michael@0	10302	// and slice dimensions can be in any order.
michael@0	10303	if (!hasFill) {
michael@0	10304	hasFill = ParseEnum(imageSliceFillValue,
michael@0	10305	nsCSSProps::kBorderImageSliceKTable);
michael@0	10306	}
michael@0	10307
michael@0	10308	nsCSSValueList* borderImageSlice = value.SetListValue();
michael@0	10309	// Put the box value into the list.
michael@0	10310	borderImageSlice->mValue = imageSliceBoxValue;
michael@0	10311
michael@0	10312	if (hasFill) {
michael@0	10313	// Put the "fill" value into the list.
michael@0	10314	borderImageSlice->mNext = new nsCSSValueList;
michael@0	10315	borderImageSlice->mNext->mValue = imageSliceFillValue;
michael@0	10316	}
michael@0	10317
michael@0	10318	AppendValue(eCSSProperty_border_image_slice, value);
michael@0	10319	return true;
michael@0	10320	}
michael@0	10321
michael@0	10322	bool
michael@0	10323	CSSParserImpl::ParseBorderImageWidth(bool aAcceptsInherit)
michael@0	10324	{
michael@0	10325	// border-image-width: initial | [<length>|<number>|<percentage>|auto]{1,4}
michael@0	10326	nsCSSValue value;
michael@0	10327
michael@0	10328	if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	10329	// Keywords "inherit", "initial" and "unset" can not be mixed, so we
michael@0	10330	// are done.
michael@0	10331	AppendValue(eCSSProperty_border_image_width, value);
michael@0	10332	return true;
michael@0	10333	}
michael@0	10334
michael@0	10335	// Parse the box dimensions.
michael@0	10336	if (!ParseGroupedBoxProperty(VARIANT_ALPN, value)) {
michael@0	10337	return false;
michael@0	10338	}
michael@0	10339
michael@0	10340	AppendValue(eCSSProperty_border_image_width, value);
michael@0	10341	return true;
michael@0	10342	}
michael@0	10343
michael@0	10344	bool
michael@0	10345	CSSParserImpl::ParseBorderImageOutset(bool aAcceptsInherit)
michael@0	10346	{
michael@0	10347	// border-image-outset: initial | [<length>|<number>]{1,4}
michael@0	10348	nsCSSValue value;
michael@0	10349
michael@0	10350	if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	10351	// Keywords "inherit", "initial" and "unset" can not be mixed, so we
michael@0	10352	// are done.
michael@0	10353	AppendValue(eCSSProperty_border_image_outset, value);
michael@0	10354	return true;
michael@0	10355	}
michael@0	10356
michael@0	10357	// Parse the box dimensions.
michael@0	10358	if (!ParseGroupedBoxProperty(VARIANT_LN, value)) {
michael@0	10359	return false;
michael@0	10360	}
michael@0	10361
michael@0	10362	AppendValue(eCSSProperty_border_image_outset, value);
michael@0	10363	return true;
michael@0	10364	}
michael@0	10365
michael@0	10366	bool
michael@0	10367	CSSParserImpl::ParseBorderImageRepeat(bool aAcceptsInherit)
michael@0	10368	{
michael@0	10369	nsCSSValue value;
michael@0	10370	if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	10371	// Keywords "inherit", "initial" and "unset" can not be mixed, so we
michael@0	10372	// are done.
michael@0	10373	AppendValue(eCSSProperty_border_image_repeat, value);
michael@0	10374	return true;
michael@0	10375	}
michael@0	10376
michael@0	10377	nsCSSValuePair result;
michael@0	10378	if (!ParseEnum(result.mXValue, nsCSSProps::kBorderImageRepeatKTable)) {
michael@0	10379	return false;
michael@0	10380	}
michael@0	10381
michael@0	10382	// optional second keyword, defaults to first
michael@0	10383	if (!ParseEnum(result.mYValue, nsCSSProps::kBorderImageRepeatKTable)) {
michael@0	10384	result.mYValue = result.mXValue;
michael@0	10385	}
michael@0	10386
michael@0	10387	value.SetPairValue(&result);
michael@0	10388	AppendValue(eCSSProperty_border_image_repeat, value);
michael@0	10389	return true;
michael@0	10390	}
michael@0	10391
michael@0	10392	bool
michael@0	10393	CSSParserImpl::ParseBorderImage()
michael@0	10394	{
michael@0	10395	nsAutoParseCompoundProperty compound(this);
michael@0	10396
michael@0	10397	// border-image: inherit | initial |
michael@0	10398	// <border-image-source> ||
michael@0	10399	// <border-image-slice>
michael@0	10400	// [ / <border-image-width> |
michael@0	10401	// / <border-image-width>? / <border-image-outset> ]? ||
michael@0	10402	// <border-image-repeat>
michael@0	10403
michael@0	10404	nsCSSValue value;
michael@0	10405	if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	10406	AppendValue(eCSSProperty_border_image_source, value);
michael@0	10407	AppendValue(eCSSProperty_border_image_slice, value);
michael@0	10408	AppendValue(eCSSProperty_border_image_width, value);
michael@0	10409	AppendValue(eCSSProperty_border_image_outset, value);
michael@0	10410	AppendValue(eCSSProperty_border_image_repeat, value);
michael@0	10411	// Keywords "inherit", "initial" and "unset" can't be mixed, so we are done.
michael@0	10412	return true;
michael@0	10413	}
michael@0	10414
michael@0	10415	// No empty property.
michael@0	10416	if (CheckEndProperty()) {
michael@0	10417	return false;
michael@0	10418	}
michael@0	10419
michael@0	10420	// Shorthand properties are required to set everything they can.
michael@0	10421	SetBorderImageInitialValues();
michael@0	10422
michael@0	10423	bool foundSource = false;
michael@0	10424	bool foundSliceWidthOutset = false;
michael@0	10425	bool foundRepeat = false;
michael@0	10426
michael@0	10427	// This loop is used to handle the parsing of border-image properties which
michael@0	10428	// can appear in any order.
michael@0	10429	nsCSSValue imageSourceValue;
michael@0	10430	while (!CheckEndProperty()) {
michael@0	10431	// <border-image-source>
michael@0	10432	if (!foundSource && ParseVariant(imageSourceValue, VARIANT_IMAGE, nullptr)) {
michael@0	10433	AppendValue(eCSSProperty_border_image_source, imageSourceValue);
michael@0	10434	foundSource = true;
michael@0	10435	continue;
michael@0	10436	}
michael@0	10437
michael@0	10438	// <border-image-slice>
michael@0	10439	// ParseBorderImageSlice is weird. It may consume tokens and then return
michael@0	10440	// false, because it parses a property with two required components that
michael@0	10441	// can appear in either order. Since the tokens that were consumed cannot
michael@0	10442	// parse as anything else we care about, this isn't a problem.
michael@0	10443	if (!foundSliceWidthOutset) {
michael@0	10444	bool sliceConsumedTokens = false;
michael@0	10445	if (ParseBorderImageSlice(false, &sliceConsumedTokens)) {
michael@0	10446	foundSliceWidthOutset = true;
michael@0	10447
michael@0	10448	// [ / <border-image-width>?
michael@0	10449	if (ExpectSymbol('/', true)) {
michael@0	10450	bool foundBorderImageWidth = ParseBorderImageWidth(false);
michael@0	10451
michael@0	10452	// [ / <border-image-outset>
michael@0	10453	if (ExpectSymbol('/', true)) {
michael@0	10454	if (!ParseBorderImageOutset(false)) {
michael@0	10455	return false;
michael@0	10456	}
michael@0	10457	} else if (!foundBorderImageWidth) {
michael@0	10458	// If this part has an trailing slash, the whole declaration is
michael@0	10459	// invalid.
michael@0	10460	return false;
michael@0	10461	}
michael@0	10462	}
michael@0	10463
michael@0	10464	continue;
michael@0	10465	} else {
michael@0	10466	// If we consumed some tokens for <border-image-slice> but did not
michael@0	10467	// successfully parse it, we have an error.
michael@0	10468	if (sliceConsumedTokens) {
michael@0	10469	return false;
michael@0	10470	}
michael@0	10471	}
michael@0	10472	}
michael@0	10473
michael@0	10474	// <border-image-repeat>
michael@0	10475	if (!foundRepeat && ParseBorderImageRepeat(false)) {
michael@0	10476	foundRepeat = true;
michael@0	10477	continue;
michael@0	10478	}
michael@0	10479
michael@0	10480	return false;
michael@0	10481	}
michael@0	10482
michael@0	10483	return true;
michael@0	10484	}
michael@0	10485
michael@0	10486	bool
michael@0	10487	CSSParserImpl::ParseBorderSpacing()
michael@0	10488	{
michael@0	10489	nsCSSValue xValue, yValue;
michael@0	10490	if (!ParseNonNegativeVariant(xValue, VARIANT_HL | VARIANT_CALC, nullptr)) {
michael@0	10491	return false;
michael@0	10492	}
michael@0	10493
michael@0	10494	// If we have one length, get the optional second length.
michael@0	10495	// set the second value equal to the first.
michael@0	10496	if (xValue.IsLengthUnit() || xValue.IsCalcUnit()) {
michael@0	10497	ParseNonNegativeVariant(yValue, VARIANT_LENGTH | VARIANT_CALC, nullptr);
michael@0	10498	}
michael@0	10499
michael@0	10500	if (yValue == xValue || yValue.GetUnit() == eCSSUnit_Null) {
michael@0	10501	AppendValue(eCSSProperty_border_spacing, xValue);
michael@0	10502	} else {
michael@0	10503	nsCSSValue pair;
michael@0	10504	pair.SetPairValue(xValue, yValue);
michael@0	10505	AppendValue(eCSSProperty_border_spacing, pair);
michael@0	10506	}
michael@0	10507	return true;
michael@0	10508	}
michael@0	10509
michael@0	10510	bool
michael@0	10511	CSSParserImpl::ParseBorderSide(const nsCSSProperty aPropIDs[],
michael@0	10512	bool aSetAllSides)
michael@0	10513	{
michael@0	10514	const int32_t numProps = 3;
michael@0	10515	nsCSSValue values[numProps];
michael@0	10516
michael@0	10517	int32_t found = ParseChoice(values, aPropIDs, numProps);
michael@0	10518	if (found < 1) {
michael@0	10519	return false;
michael@0	10520	}
michael@0	10521
michael@0	10522	if ((found & 1) == 0) { // Provide default border-width
michael@0	10523	values[0].SetIntValue(NS_STYLE_BORDER_WIDTH_MEDIUM, eCSSUnit_Enumerated);
michael@0	10524	}
michael@0	10525	if ((found & 2) == 0) { // Provide default border-style
michael@0	10526	values[1].SetIntValue(NS_STYLE_BORDER_STYLE_NONE, eCSSUnit_Enumerated);
michael@0	10527	}
michael@0	10528	if ((found & 4) == 0) { // text color will be used
michael@0	10529	values[2].SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR, eCSSUnit_Enumerated);
michael@0	10530	}
michael@0	10531
michael@0	10532	if (aSetAllSides) {
michael@0	10533	static const nsCSSProperty kBorderSources[] = {
michael@0	10534	eCSSProperty_border_left_color_ltr_source,
michael@0	10535	eCSSProperty_border_left_color_rtl_source,
michael@0	10536	eCSSProperty_border_right_color_ltr_source,
michael@0	10537	eCSSProperty_border_right_color_rtl_source,
michael@0	10538	eCSSProperty_border_left_style_ltr_source,
michael@0	10539	eCSSProperty_border_left_style_rtl_source,
michael@0	10540	eCSSProperty_border_right_style_ltr_source,
michael@0	10541	eCSSProperty_border_right_style_rtl_source,
michael@0	10542	eCSSProperty_border_left_width_ltr_source,
michael@0	10543	eCSSProperty_border_left_width_rtl_source,
michael@0	10544	eCSSProperty_border_right_width_ltr_source,
michael@0	10545	eCSSProperty_border_right_width_rtl_source,
michael@0	10546	eCSSProperty_UNKNOWN
michael@0	10547	};
michael@0	10548
michael@0	10549	InitBoxPropsAsPhysical(kBorderSources);
michael@0	10550
michael@0	10551	// Parsing "border" shorthand; set all four sides to the same thing
michael@0	10552	for (int32_t index = 0; index < 4; index++) {
michael@0	10553	NS_ASSERTION(numProps == 3, "This code needs updating");
michael@0	10554	AppendValue(kBorderWidthIDs[index], values[0]);
michael@0	10555	AppendValue(kBorderStyleIDs[index], values[1]);
michael@0	10556	AppendValue(kBorderColorIDs[index], values[2]);
michael@0	10557	}
michael@0	10558
michael@0	10559	static const nsCSSProperty kBorderColorsProps[] = {
michael@0	10560	eCSSProperty_border_top_colors,
michael@0	10561	eCSSProperty_border_right_colors,
michael@0	10562	eCSSProperty_border_bottom_colors,
michael@0	10563	eCSSProperty_border_left_colors
michael@0	10564	};
michael@0	10565
michael@0	10566	// Set the other properties that the border shorthand sets to their
michael@0	10567	// initial values.
michael@0	10568	nsCSSValue extraValue;
michael@0	10569	switch (values[0].GetUnit()) {
michael@0	10570	case eCSSUnit_Inherit:
michael@0	10571	case eCSSUnit_Initial:
michael@0	10572	case eCSSUnit_Unset:
michael@0	10573	extraValue = values[0];
michael@0	10574	// Set value of border-image properties to initial/inherit/unset
michael@0	10575	AppendValue(eCSSProperty_border_image_source, extraValue);
michael@0	10576	AppendValue(eCSSProperty_border_image_slice, extraValue);
michael@0	10577	AppendValue(eCSSProperty_border_image_width, extraValue);
michael@0	10578	AppendValue(eCSSProperty_border_image_outset, extraValue);
michael@0	10579	AppendValue(eCSSProperty_border_image_repeat, extraValue);
michael@0	10580	break;
michael@0	10581	default:
michael@0	10582	extraValue.SetNoneValue();
michael@0	10583	SetBorderImageInitialValues();
michael@0	10584	break;
michael@0	10585	}
michael@0	10586	NS_FOR_CSS_SIDES(side) {
michael@0	10587	AppendValue(kBorderColorsProps[side], extraValue);
michael@0	10588	}
michael@0	10589	}
michael@0	10590	else {
michael@0	10591	// Just set our one side
michael@0	10592	for (int32_t index = 0; index < numProps; index++) {
michael@0	10593	AppendValue(aPropIDs[index], values[index]);
michael@0	10594	}
michael@0	10595	}
michael@0	10596	return true;
michael@0	10597	}
michael@0	10598
michael@0	10599	bool
michael@0	10600	CSSParserImpl::ParseDirectionalBorderSide(const nsCSSProperty aPropIDs[],
michael@0	10601	int32_t aSourceType)
michael@0	10602	{
michael@0	10603	const int32_t numProps = 3;
michael@0	10604	nsCSSValue values[numProps];
michael@0	10605
michael@0	10606	int32_t found = ParseChoice(values, aPropIDs, numProps);
michael@0	10607	if (found < 1) {
michael@0	10608	return false;
michael@0	10609	}
michael@0	10610
michael@0	10611	if ((found & 1) == 0) { // Provide default border-width
michael@0	10612	values[0].SetIntValue(NS_STYLE_BORDER_WIDTH_MEDIUM, eCSSUnit_Enumerated);
michael@0	10613	}
michael@0	10614	if ((found & 2) == 0) { // Provide default border-style
michael@0	10615	values[1].SetIntValue(NS_STYLE_BORDER_STYLE_NONE, eCSSUnit_Enumerated);
michael@0	10616	}
michael@0	10617	if ((found & 4) == 0) { // text color will be used
michael@0	10618	values[2].SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR, eCSSUnit_Enumerated);
michael@0	10619	}
michael@0	10620	for (int32_t index = 0; index < numProps; index++) {
michael@0	10621	const nsCSSProperty* subprops =
michael@0	10622	nsCSSProps::SubpropertyEntryFor(aPropIDs[index + numProps]);
michael@0	10623	NS_ASSERTION(subprops[3] == eCSSProperty_UNKNOWN,
michael@0	10624	"not box property with physical vs. logical cascading");
michael@0	10625	AppendValue(subprops[0], values[index]);
michael@0	10626	nsCSSValue typeVal(aSourceType, eCSSUnit_Enumerated);
michael@0	10627	AppendValue(subprops[1], typeVal);
michael@0	10628	AppendValue(subprops[2], typeVal);
michael@0	10629	}
michael@0	10630	return true;
michael@0	10631	}
michael@0	10632
michael@0	10633	bool
michael@0	10634	CSSParserImpl::ParseBorderStyle()
michael@0	10635	{
michael@0	10636	static const nsCSSProperty kBorderStyleSources[] = {
michael@0	10637	eCSSProperty_border_left_style_ltr_source,
michael@0	10638	eCSSProperty_border_left_style_rtl_source,
michael@0	10639	eCSSProperty_border_right_style_ltr_source,
michael@0	10640	eCSSProperty_border_right_style_rtl_source,
michael@0	10641	eCSSProperty_UNKNOWN
michael@0	10642	};
michael@0	10643
michael@0	10644	// do this now, in case 4 values weren't specified
michael@0	10645	InitBoxPropsAsPhysical(kBorderStyleSources);
michael@0	10646	return ParseBoxProperties(kBorderStyleIDs);
michael@0	10647	}
michael@0	10648
michael@0	10649	bool
michael@0	10650	CSSParserImpl::ParseBorderWidth()
michael@0	10651	{
michael@0	10652	static const nsCSSProperty kBorderWidthSources[] = {
michael@0	10653	eCSSProperty_border_left_width_ltr_source,
michael@0	10654	eCSSProperty_border_left_width_rtl_source,
michael@0	10655	eCSSProperty_border_right_width_ltr_source,
michael@0	10656	eCSSProperty_border_right_width_rtl_source,
michael@0	10657	eCSSProperty_UNKNOWN
michael@0	10658	};
michael@0	10659
michael@0	10660	// do this now, in case 4 values weren't specified
michael@0	10661	InitBoxPropsAsPhysical(kBorderWidthSources);
michael@0	10662	return ParseBoxProperties(kBorderWidthIDs);
michael@0	10663	}
michael@0	10664
michael@0	10665	bool
michael@0	10666	CSSParserImpl::ParseBorderColors(nsCSSProperty aProperty)
michael@0	10667	{
michael@0	10668	nsCSSValue value;
michael@0	10669	// 'inherit', 'initial', 'unset' and 'none' are only allowed on their own
michael@0	10670	if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	10671	nsCSSValueList *cur = value.SetListValue();
michael@0	10672	for (;;) {
michael@0	10673	if (!ParseVariant(cur->mValue, VARIANT_COLOR | VARIANT_KEYWORD,
michael@0	10674	nsCSSProps::kBorderColorKTable)) {
michael@0	10675	return false;
michael@0	10676	}
michael@0	10677	if (CheckEndProperty()) {
michael@0	10678	break;
michael@0	10679	}
michael@0	10680	cur->mNext = new nsCSSValueList;
michael@0	10681	cur = cur->mNext;
michael@0	10682	}
michael@0	10683	}
michael@0	10684	AppendValue(aProperty, value);
michael@0	10685	return true;
michael@0	10686	}
michael@0	10687
michael@0	10688	// Parse the top level of a calc() expression.
michael@0	10689	bool
michael@0	10690	CSSParserImpl::ParseCalc(nsCSSValue &aValue, int32_t aVariantMask)
michael@0	10691	{
michael@0	10692	// Parsing calc expressions requires, in a number of cases, looking
michael@0	10693	// for a token that is *either* a value of the property or a number.
michael@0	10694	// This can be done without lookahead when we assume that the property
michael@0	10695	// values cannot themselves be numbers.
michael@0	10696	NS_ASSERTION(!(aVariantMask & VARIANT_NUMBER), "unexpected variant mask");
michael@0	10697	NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
michael@0	10698
michael@0	10699	bool oldUnitlessLengthQuirk = mUnitlessLengthQuirk;
michael@0	10700	mUnitlessLengthQuirk = false;
michael@0	10701
michael@0	10702	// One-iteration loop so we can break to the error-handling case.
michael@0	10703	do {
michael@0	10704	// The toplevel of a calc() is always an nsCSSValue::Array of length 1.
michael@0	10705	nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(1);
michael@0	10706
michael@0	10707	if (!ParseCalcAdditiveExpression(arr->Item(0), aVariantMask))
michael@0	10708	break;
michael@0	10709
michael@0	10710	if (!ExpectSymbol(')', true))
michael@0	10711	break;
michael@0	10712
michael@0	10713	aValue.SetArrayValue(arr, eCSSUnit_Calc);
michael@0	10714	mUnitlessLengthQuirk = oldUnitlessLengthQuirk;
michael@0	10715	return true;
michael@0	10716	} while (false);
michael@0	10717
michael@0	10718	SkipUntil(')');
michael@0	10719	mUnitlessLengthQuirk = oldUnitlessLengthQuirk;
michael@0	10720	return false;
michael@0	10721	}
michael@0	10722
michael@0	10723	// We optimize away the <value-expression> production given that
michael@0	10724	// ParseVariant consumes initial whitespace and we call
michael@0	10725	// ExpectSymbol(')') with true for aSkipWS.
michael@0	10726	// * If aVariantMask is VARIANT_NUMBER, this function parses the
michael@0	10727	// <number-additive-expression> production.
michael@0	10728	// * If aVariantMask does not contain VARIANT_NUMBER, this function
michael@0	10729	// parses the <value-additive-expression> production.
michael@0	10730	// * Otherwise (VARIANT_NUMBER and other bits) this function parses
michael@0	10731	// whichever one of the productions matches ***and modifies
michael@0	10732	// aVariantMask*** to reflect which one it has parsed by either
michael@0	10733	// removing VARIANT_NUMBER or removing all other bits.
michael@0	10734	// It does so iteratively, but builds the correct recursive
michael@0	10735	// data structure.
michael@0	10736	bool
michael@0	10737	CSSParserImpl::ParseCalcAdditiveExpression(nsCSSValue& aValue,
michael@0	10738	int32_t& aVariantMask)
michael@0	10739	{
michael@0	10740	NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
michael@0	10741	nsCSSValue *storage = &aValue;
michael@0	10742	for (;;) {
michael@0	10743	bool haveWS;
michael@0	10744	if (!ParseCalcMultiplicativeExpression(*storage, aVariantMask, &haveWS))
michael@0	10745	return false;
michael@0	10746
michael@0	10747	if (!haveWS || !GetToken(false))
michael@0	10748	return true;
michael@0	10749	nsCSSUnit unit;
michael@0	10750	if (mToken.IsSymbol('+')) {
michael@0	10751	unit = eCSSUnit_Calc_Plus;
michael@0	10752	} else if (mToken.IsSymbol('-')) {
michael@0	10753	unit = eCSSUnit_Calc_Minus;
michael@0	10754	} else {
michael@0	10755	UngetToken();
michael@0	10756	return true;
michael@0	10757	}
michael@0	10758	if (!RequireWhitespace())
michael@0	10759	return false;
michael@0	10760
michael@0	10761	nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(2);
michael@0	10762	arr->Item(0) = aValue;
michael@0	10763	storage = &arr->Item(1);
michael@0	10764	aValue.SetArrayValue(arr, unit);
michael@0	10765	}
michael@0	10766	}
michael@0	10767
michael@0	10768	struct ReduceNumberCalcOps : public mozilla::css::BasicFloatCalcOps,
michael@0	10769	public mozilla::css::CSSValueInputCalcOps
michael@0	10770	{
michael@0	10771	result_type ComputeLeafValue(const nsCSSValue& aValue)
michael@0	10772	{
michael@0	10773	NS_ABORT_IF_FALSE(aValue.GetUnit() == eCSSUnit_Number, "unexpected unit");
michael@0	10774	return aValue.GetFloatValue();
michael@0	10775	}
michael@0	10776
michael@0	10777	float ComputeNumber(const nsCSSValue& aValue)
michael@0	10778	{
michael@0	10779	return mozilla::css::ComputeCalc(aValue, *this);
michael@0	10780	}
michael@0	10781	};
michael@0	10782
michael@0	10783	// * If aVariantMask is VARIANT_NUMBER, this function parses the
michael@0	10784	// <number-multiplicative-expression> production.
michael@0	10785	// * If aVariantMask does not contain VARIANT_NUMBER, this function
michael@0	10786	// parses the <value-multiplicative-expression> production.
michael@0	10787	// * Otherwise (VARIANT_NUMBER and other bits) this function parses
michael@0	10788	// whichever one of the productions matches ***and modifies
michael@0	10789	// aVariantMask*** to reflect which one it has parsed by either
michael@0	10790	// removing VARIANT_NUMBER or removing all other bits.
michael@0	10791	// It does so iteratively, but builds the correct recursive data
michael@0	10792	// structure.
michael@0	10793	// This function always consumes *trailing* whitespace when it returns
michael@0	10794	// true; whether there was any such whitespace is returned in the
michael@0	10795	// aHadFinalWS parameter.
michael@0	10796	bool
michael@0	10797	CSSParserImpl::ParseCalcMultiplicativeExpression(nsCSSValue& aValue,
michael@0	10798	int32_t& aVariantMask,
michael@0	10799	bool *aHadFinalWS)
michael@0	10800	{
michael@0	10801	NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
michael@0	10802	bool gotValue = false; // already got the part with the unit
michael@0	10803	bool afterDivision = false;
michael@0	10804
michael@0	10805	nsCSSValue *storage = &aValue;
michael@0	10806	for (;;) {
michael@0	10807	int32_t variantMask;
michael@0	10808	if (afterDivision || gotValue) {
michael@0	10809	variantMask = VARIANT_NUMBER;
michael@0	10810	} else {
michael@0	10811	variantMask = aVariantMask | VARIANT_NUMBER;
michael@0	10812	}
michael@0	10813	if (!ParseCalcTerm(*storage, variantMask))
michael@0	10814	return false;
michael@0	10815	NS_ABORT_IF_FALSE(variantMask != 0,
michael@0	10816	"ParseCalcTerm did not set variantMask appropriately");
michael@0	10817	NS_ABORT_IF_FALSE(!(variantMask & VARIANT_NUMBER) ||
michael@0	10818	!(variantMask & ~int32_t(VARIANT_NUMBER)),
michael@0	10819	"ParseCalcTerm did not set variantMask appropriately");
michael@0	10820
michael@0	10821	if (variantMask & VARIANT_NUMBER) {
michael@0	10822	// Simplify the value immediately so we can check for division by
michael@0	10823	// zero.
michael@0	10824	ReduceNumberCalcOps ops;
michael@0	10825	float number = mozilla::css::ComputeCalc(*storage, ops);
michael@0	10826	if (number == 0.0 && afterDivision)
michael@0	10827	return false;
michael@0	10828	storage->SetFloatValue(number, eCSSUnit_Number);
michael@0	10829	} else {
michael@0	10830	gotValue = true;
michael@0	10831
michael@0	10832	if (storage != &aValue) {
michael@0	10833	// Simplify any numbers in the Times_L position (which are
michael@0	10834	// not simplified by the check above).
michael@0	10835	NS_ABORT_IF_FALSE(storage == &aValue.GetArrayValue()->Item(1),
michael@0	10836	"unexpected relationship to current storage");
michael@0	10837	nsCSSValue &leftValue = aValue.GetArrayValue()->Item(0);
michael@0	10838	ReduceNumberCalcOps ops;
michael@0	10839	float number = mozilla::css::ComputeCalc(leftValue, ops);
michael@0	10840	leftValue.SetFloatValue(number, eCSSUnit_Number);
michael@0	10841	}
michael@0	10842	}
michael@0	10843
michael@0	10844	bool hadWS = RequireWhitespace();
michael@0	10845	if (!GetToken(false)) {
michael@0	10846	*aHadFinalWS = hadWS;
michael@0	10847	break;
michael@0	10848	}
michael@0	10849	nsCSSUnit unit;
michael@0	10850	if (mToken.IsSymbol('*')) {
michael@0	10851	unit = gotValue ? eCSSUnit_Calc_Times_R : eCSSUnit_Calc_Times_L;
michael@0	10852	afterDivision = false;
michael@0	10853	} else if (mToken.IsSymbol('/')) {
michael@0	10854	unit = eCSSUnit_Calc_Divided;
michael@0	10855	afterDivision = true;
michael@0	10856	} else {
michael@0	10857	UngetToken();
michael@0	10858	*aHadFinalWS = hadWS;
michael@0	10859	break;
michael@0	10860	}
michael@0	10861
michael@0	10862	nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(2);
michael@0	10863	arr->Item(0) = aValue;
michael@0	10864	storage = &arr->Item(1);
michael@0	10865	aValue.SetArrayValue(arr, unit);
michael@0	10866	}
michael@0	10867
michael@0	10868	// Adjust aVariantMask (see comments above function) to reflect which
michael@0	10869	// option we took.
michael@0	10870	if (aVariantMask & VARIANT_NUMBER) {
michael@0	10871	if (gotValue) {
michael@0	10872	aVariantMask &= ~int32_t(VARIANT_NUMBER);
michael@0	10873	} else {
michael@0	10874	aVariantMask = VARIANT_NUMBER;
michael@0	10875	}
michael@0	10876	} else {
michael@0	10877	if (!gotValue) {
michael@0	10878	// We had to find a value, but we didn't.
michael@0	10879	return false;
michael@0	10880	}
michael@0	10881	}
michael@0	10882
michael@0	10883	return true;
michael@0	10884	}
michael@0	10885
michael@0	10886	// * If aVariantMask is VARIANT_NUMBER, this function parses the
michael@0	10887	// <number-term> production.
michael@0	10888	// * If aVariantMask does not contain VARIANT_NUMBER, this function
michael@0	10889	// parses the <value-term> production.
michael@0	10890	// * Otherwise (VARIANT_NUMBER and other bits) this function parses
michael@0	10891	// whichever one of the productions matches ***and modifies
michael@0	10892	// aVariantMask*** to reflect which one it has parsed by either
michael@0	10893	// removing VARIANT_NUMBER or removing all other bits.
michael@0	10894	bool
michael@0	10895	CSSParserImpl::ParseCalcTerm(nsCSSValue& aValue, int32_t& aVariantMask)
michael@0	10896	{
michael@0	10897	NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
michael@0	10898	if (!GetToken(true))
michael@0	10899	return false;
michael@0	10900	// Either an additive expression in parentheses...
michael@0	10901	if (mToken.IsSymbol('(')) {
michael@0	10902	if (!ParseCalcAdditiveExpression(aValue, aVariantMask) ||
michael@0	10903	!ExpectSymbol(')', true)) {
michael@0	10904	SkipUntil(')');
michael@0	10905	return false;
michael@0	10906	}
michael@0	10907	return true;
michael@0	10908	}
michael@0	10909	// ... or just a value
michael@0	10910	UngetToken();
michael@0	10911	// Always pass VARIANT_NUMBER to ParseVariant so that unitless zero
michael@0	10912	// always gets picked up
michael@0	10913	if (!ParseVariant(aValue, aVariantMask | VARIANT_NUMBER, nullptr)) {
michael@0	10914	return false;
michael@0	10915	}
michael@0	10916	// ...and do the VARIANT_NUMBER check ourselves.
michael@0	10917	if (!(aVariantMask & VARIANT_NUMBER) && aValue.GetUnit() == eCSSUnit_Number) {
michael@0	10918	return false;
michael@0	10919	}
michael@0	10920	// If we did the value parsing, we need to adjust aVariantMask to
michael@0	10921	// reflect which option we took (see above).
michael@0	10922	if (aVariantMask & VARIANT_NUMBER) {
michael@0	10923	if (aValue.GetUnit() == eCSSUnit_Number) {
michael@0	10924	aVariantMask = VARIANT_NUMBER;
michael@0	10925	} else {
michael@0	10926	aVariantMask &= ~int32_t(VARIANT_NUMBER);
michael@0	10927	}
michael@0	10928	}
michael@0	10929	return true;
michael@0	10930	}
michael@0	10931
michael@0	10932	// This function consumes all consecutive whitespace and returns whether
michael@0	10933	// there was any.
michael@0	10934	bool
michael@0	10935	CSSParserImpl::RequireWhitespace()
michael@0	10936	{
michael@0	10937	if (!GetToken(false))
michael@0	10938	return false;
michael@0	10939	if (mToken.mType != eCSSToken_Whitespace) {
michael@0	10940	UngetToken();
michael@0	10941	return false;
michael@0	10942	}
michael@0	10943	// Skip any additional whitespace tokens.
michael@0	10944	if (GetToken(true)) {
michael@0	10945	UngetToken();
michael@0	10946	}
michael@0	10947	return true;
michael@0	10948	}
michael@0	10949
michael@0	10950	bool
michael@0	10951	CSSParserImpl::ParseRect(nsCSSProperty aPropID)
michael@0	10952	{
michael@0	10953	nsCSSValue val;
michael@0	10954	if (ParseVariant(val, VARIANT_INHERIT | VARIANT_AUTO, nullptr)) {
michael@0	10955	AppendValue(aPropID, val);
michael@0	10956	return true;
michael@0	10957	}
michael@0	10958
michael@0	10959	if (! GetToken(true)) {
michael@0	10960	return false;
michael@0	10961	}
michael@0	10962
michael@0	10963	if (mToken.mType == eCSSToken_Function &&
michael@0	10964	mToken.mIdent.LowerCaseEqualsLiteral("rect")) {
michael@0	10965	nsCSSRect& rect = val.SetRectValue();
michael@0	10966	bool useCommas;
michael@0	10967	NS_FOR_CSS_SIDES(side) {
michael@0	10968	if (! ParseVariant(rect.*(nsCSSRect::sides[side]),
michael@0	10969	VARIANT_AL, nullptr)) {
michael@0	10970	return false;
michael@0	10971	}
michael@0	10972	if (side == 0) {
michael@0	10973	useCommas = ExpectSymbol(',', true);
michael@0	10974	} else if (useCommas && side < 3) {
michael@0	10975	// Skip optional commas between elements, but only if the first
michael@0	10976	// separator was a comma.
michael@0	10977	if (!ExpectSymbol(',', true)) {
michael@0	10978	return false;
michael@0	10979	}
michael@0	10980	}
michael@0	10981	}
michael@0	10982	if (!ExpectSymbol(')', true)) {
michael@0	10983	return false;
michael@0	10984	}
michael@0	10985	} else {
michael@0	10986	UngetToken();
michael@0	10987	return false;
michael@0	10988	}
michael@0	10989
michael@0	10990	AppendValue(aPropID, val);
michael@0	10991	return true;
michael@0	10992	}
michael@0	10993
michael@0	10994	bool
michael@0	10995	CSSParserImpl::ParseColumns()
michael@0	10996	{
michael@0	10997	// We use a similar "fake value" hack to ParseListStyle, because
michael@0	10998	// "auto" is acceptable for both column-count and column-width.
michael@0	10999	// If the fake "auto" value is found, and one of the real values isn't,
michael@0	11000	// that means the fake auto value is meant for the real value we didn't
michael@0	11001	// find.
michael@0	11002	static const nsCSSProperty columnIDs[] = {
michael@0	11003	eCSSPropertyExtra_x_auto_value,
michael@0	11004	eCSSProperty__moz_column_count,
michael@0	11005	eCSSProperty__moz_column_width
michael@0	11006	};
michael@0	11007	const int32_t numProps = MOZ_ARRAY_LENGTH(columnIDs);
michael@0	11008
michael@0	11009	nsCSSValue values[numProps];
michael@0	11010	int32_t found = ParseChoice(values, columnIDs, numProps);
michael@0	11011	if (found < 1) {
michael@0	11012	return false;
michael@0	11013	}
michael@0	11014	if ((found & (1|2|4)) == (1|2|4) &&
michael@0	11015	values[0].GetUnit() == eCSSUnit_Auto) {
michael@0	11016	// We filled all 3 values, which is invalid
michael@0	11017	return false;
michael@0	11018	}
michael@0	11019
michael@0	11020	if ((found & 2) == 0) {
michael@0	11021	// Provide auto column-count
michael@0	11022	values[1].SetAutoValue();
michael@0	11023	}
michael@0	11024	if ((found & 4) == 0) {
michael@0	11025	// Provide auto column-width
michael@0	11026	values[2].SetAutoValue();
michael@0	11027	}
michael@0	11028
michael@0	11029	// Start at index 1 to skip the fake auto value.
michael@0	11030	for (int32_t index = 1; index < numProps; index++) {
michael@0	11031	AppendValue(columnIDs[index], values[index]);
michael@0	11032	}
michael@0	11033	return true;
michael@0	11034	}
michael@0	11035
michael@0	11036	#define VARIANT_CONTENT (VARIANT_STRING | VARIANT_URL | VARIANT_COUNTER | VARIANT_ATTR | \
michael@0	11037	VARIANT_KEYWORD)
michael@0	11038	bool
michael@0	11039	CSSParserImpl::ParseContent()
michael@0	11040	{
michael@0	11041	// We need to divide the 'content' keywords into two classes for
michael@0	11042	// ParseVariant's sake, so we can't just use nsCSSProps::kContentKTable.
michael@0	11043	static const KTableValue kContentListKWs[] = {
michael@0	11044	eCSSKeyword_open_quote, NS_STYLE_CONTENT_OPEN_QUOTE,
michael@0	11045	eCSSKeyword_close_quote, NS_STYLE_CONTENT_CLOSE_QUOTE,
michael@0	11046	eCSSKeyword_no_open_quote, NS_STYLE_CONTENT_NO_OPEN_QUOTE,
michael@0	11047	eCSSKeyword_no_close_quote, NS_STYLE_CONTENT_NO_CLOSE_QUOTE,
michael@0	11048	eCSSKeyword_UNKNOWN,-1
michael@0	11049	};
michael@0	11050
michael@0	11051	static const KTableValue kContentSolitaryKWs[] = {
michael@0	11052	eCSSKeyword__moz_alt_content, NS_STYLE_CONTENT_ALT_CONTENT,
michael@0	11053	eCSSKeyword_UNKNOWN,-1
michael@0	11054	};
michael@0	11055
michael@0	11056	// Verify that these two lists add up to the size of
michael@0	11057	// nsCSSProps::kContentKTable.
michael@0	11058	NS_ABORT_IF_FALSE(nsCSSProps::kContentKTable[
michael@0	11059	ArrayLength(kContentListKWs) +
michael@0	11060	ArrayLength(kContentSolitaryKWs) - 4] ==
michael@0	11061	eCSSKeyword_UNKNOWN &&
michael@0	11062	nsCSSProps::kContentKTable[
michael@0	11063	ArrayLength(kContentListKWs) +
michael@0	11064	ArrayLength(kContentSolitaryKWs) - 3] == -1,
michael@0	11065	"content keyword tables out of sync");
michael@0	11066
michael@0	11067	nsCSSValue value;
michael@0	11068	// 'inherit', 'initial', 'unset', 'normal', 'none', and 'alt-content' must
michael@0	11069	// be alone
michael@0	11070	if (!ParseVariant(value, VARIANT_HMK | VARIANT_NONE,
michael@0	11071	kContentSolitaryKWs)) {
michael@0	11072	nsCSSValueList* cur = value.SetListValue();
michael@0	11073	for (;;) {
michael@0	11074	if (!ParseVariant(cur->mValue, VARIANT_CONTENT, kContentListKWs)) {
michael@0	11075	return false;
michael@0	11076	}
michael@0	11077	if (CheckEndProperty()) {
michael@0	11078	break;
michael@0	11079	}
michael@0	11080	cur->mNext = new nsCSSValueList;
michael@0	11081	cur = cur->mNext;
michael@0	11082	}
michael@0	11083	}
michael@0	11084	AppendValue(eCSSProperty_content, value);
michael@0	11085	return true;
michael@0	11086	}
michael@0	11087
michael@0	11088	bool
michael@0	11089	CSSParserImpl::ParseCounterData(nsCSSProperty aPropID)
michael@0	11090	{
michael@0	11091	static const nsCSSKeyword kCounterDataKTable[] = {
michael@0	11092	eCSSKeyword_none,
michael@0	11093	eCSSKeyword_UNKNOWN
michael@0	11094	};
michael@0	11095	nsCSSValue value;
michael@0	11096	if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	11097	if (!GetToken(true)) {
michael@0	11098	return false;
michael@0	11099	}
michael@0	11100	if (mToken.mType != eCSSToken_Ident) {
michael@0	11101	UngetToken();
michael@0	11102	return false;
michael@0	11103	}
michael@0	11104
michael@0	11105	nsCSSValuePairList *cur = value.SetPairListValue();
michael@0	11106	for (;;) {
michael@0	11107	if (!ParseCustomIdent(cur->mXValue, mToken.mIdent, kCounterDataKTable)) {
michael@0	11108	return false;
michael@0	11109	}
michael@0	11110	if (!GetToken(true)) {
michael@0	11111	break;
michael@0	11112	}
michael@0	11113	if (mToken.mType == eCSSToken_Number && mToken.mIntegerValid) {
michael@0	11114	cur->mYValue.SetIntValue(mToken.mInteger, eCSSUnit_Integer);
michael@0	11115	} else {
michael@0	11116	UngetToken();
michael@0	11117	}
michael@0	11118	if (!GetToken(true)) {
michael@0	11119	break;
michael@0	11120	}
michael@0	11121	if (mToken.mType != eCSSToken_Ident) {
michael@0	11122	UngetToken();
michael@0	11123	break;
michael@0	11124	}
michael@0	11125	cur->mNext = new nsCSSValuePairList;
michael@0	11126	cur = cur->mNext;
michael@0	11127	}
michael@0	11128	}
michael@0	11129	AppendValue(aPropID, value);
michael@0	11130	return true;
michael@0	11131	}
michael@0	11132
michael@0	11133	bool
michael@0	11134	CSSParserImpl::ParseCursor()
michael@0	11135	{
michael@0	11136	nsCSSValue value;
michael@0	11137	// 'inherit', 'initial' and 'unset' must be alone
michael@0	11138	if (!ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	11139	nsCSSValueList* cur = value.SetListValue();
michael@0	11140	for (;;) {
michael@0	11141	if (!ParseVariant(cur->mValue, VARIANT_UK, nsCSSProps::kCursorKTable)) {
michael@0	11142	return false;
michael@0	11143	}
michael@0	11144	if (cur->mValue.GetUnit() != eCSSUnit_URL) { // keyword must be last
michael@0	11145	break;
michael@0	11146	}
michael@0	11147
michael@0	11148	// We have a URL, so make a value array with three values.
michael@0	11149	nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(3);
michael@0	11150	val->Item(0) = cur->mValue;
michael@0	11151
michael@0	11152	// Parse optional x and y position of cursor hotspot (css3-ui).
michael@0	11153	if (ParseVariant(val->Item(1), VARIANT_NUMBER, nullptr)) {
michael@0	11154	// If we have one number, we must have two.
michael@0	11155	if (!ParseVariant(val->Item(2), VARIANT_NUMBER, nullptr)) {
michael@0	11156	return false;
michael@0	11157	}
michael@0	11158	}
michael@0	11159	cur->mValue.SetArrayValue(val, eCSSUnit_Array);
michael@0	11160
michael@0	11161	if (!ExpectSymbol(',', true)) { // url must not be last
michael@0	11162	return false;
michael@0	11163	}
michael@0	11164	cur->mNext = new nsCSSValueList;
michael@0	11165	cur = cur->mNext;
michael@0	11166	}
michael@0	11167	}
michael@0	11168	AppendValue(eCSSProperty_cursor, value);
michael@0	11169	return true;
michael@0	11170	}
michael@0	11171
michael@0	11172
michael@0	11173	bool
michael@0	11174	CSSParserImpl::ParseFont()
michael@0	11175	{
michael@0	11176	static const nsCSSProperty fontIDs[] = {
michael@0	11177	eCSSProperty_font_style,
michael@0	11178	eCSSProperty_font_variant,
michael@0	11179	eCSSProperty_font_weight
michael@0	11180	};
michael@0	11181
michael@0	11182	// font-variant-alternates enabled ==> layout.css.font-features.enabled is true
michael@0	11183	bool featuresEnabled =
michael@0	11184	nsCSSProps::IsEnabled(eCSSProperty_font_variant_alternates);
michael@0	11185	nsCSSValue family;
michael@0	11186	if (ParseVariant(family, VARIANT_HK, nsCSSProps::kFontKTable)) {
michael@0	11187	if (eCSSUnit_Inherit == family.GetUnit() ||
michael@0	11188	eCSSUnit_Initial == family.GetUnit() ||
michael@0	11189	eCSSUnit_Unset == family.GetUnit()) {
michael@0	11190	AppendValue(eCSSProperty__x_system_font, nsCSSValue(eCSSUnit_None));
michael@0	11191	AppendValue(eCSSProperty_font_family, family);
michael@0	11192	AppendValue(eCSSProperty_font_style, family);
michael@0	11193	AppendValue(eCSSProperty_font_variant, family);
michael@0	11194	AppendValue(eCSSProperty_font_weight, family);
michael@0	11195	AppendValue(eCSSProperty_font_size, family);
michael@0	11196	AppendValue(eCSSProperty_line_height, family);
michael@0	11197	AppendValue(eCSSProperty_font_stretch, family);
michael@0	11198	AppendValue(eCSSProperty_font_size_adjust, family);
michael@0	11199	AppendValue(eCSSProperty_font_feature_settings, family);
michael@0	11200	AppendValue(eCSSProperty_font_language_override, family);
michael@0	11201	if (featuresEnabled) {
michael@0	11202	AppendValue(eCSSProperty_font_kerning, family);
michael@0	11203	AppendValue(eCSSProperty_font_synthesis, family);
michael@0	11204	AppendValue(eCSSProperty_font_variant_alternates, family);
michael@0	11205	AppendValue(eCSSProperty_font_variant_caps, family);
michael@0	11206	AppendValue(eCSSProperty_font_variant_east_asian, family);
michael@0	11207	AppendValue(eCSSProperty_font_variant_ligatures, family);
michael@0	11208	AppendValue(eCSSProperty_font_variant_numeric, family);
michael@0	11209	AppendValue(eCSSProperty_font_variant_position, family);
michael@0	11210	}
michael@0	11211	}
michael@0	11212	else {
michael@0	11213	AppendValue(eCSSProperty__x_system_font, family);
michael@0	11214	nsCSSValue systemFont(eCSSUnit_System_Font);
michael@0	11215	AppendValue(eCSSProperty_font_family, systemFont);
michael@0	11216	AppendValue(eCSSProperty_font_style, systemFont);
michael@0	11217	AppendValue(eCSSProperty_font_variant, systemFont);
michael@0	11218	AppendValue(eCSSProperty_font_weight, systemFont);
michael@0	11219	AppendValue(eCSSProperty_font_size, systemFont);
michael@0	11220	AppendValue(eCSSProperty_line_height, systemFont);
michael@0	11221	AppendValue(eCSSProperty_font_stretch, systemFont);
michael@0	11222	AppendValue(eCSSProperty_font_size_adjust, systemFont);
michael@0	11223	AppendValue(eCSSProperty_font_feature_settings, systemFont);
michael@0	11224	AppendValue(eCSSProperty_font_language_override, systemFont);
michael@0	11225	if (featuresEnabled) {
michael@0	11226	AppendValue(eCSSProperty_font_kerning, systemFont);
michael@0	11227	AppendValue(eCSSProperty_font_synthesis, systemFont);
michael@0	11228	AppendValue(eCSSProperty_font_variant_alternates, systemFont);
michael@0	11229	AppendValue(eCSSProperty_font_variant_caps, systemFont);
michael@0	11230	AppendValue(eCSSProperty_font_variant_east_asian, systemFont);
michael@0	11231	AppendValue(eCSSProperty_font_variant_ligatures, systemFont);
michael@0	11232	AppendValue(eCSSProperty_font_variant_numeric, systemFont);
michael@0	11233	AppendValue(eCSSProperty_font_variant_position, systemFont);
michael@0	11234	}
michael@0	11235	}
michael@0	11236	return true;
michael@0	11237	}
michael@0	11238
michael@0	11239	// Get optional font-style, font-variant and font-weight (in any order)
michael@0	11240	const int32_t numProps = 3;
michael@0	11241	nsCSSValue values[numProps];
michael@0	11242	int32_t found = ParseChoice(values, fontIDs, numProps);
michael@0	11243	if (found < 0 ||
michael@0	11244	eCSSUnit_Inherit == values[0].GetUnit() ||
michael@0	11245	eCSSUnit_Initial == values[0].GetUnit() ||
michael@0	11246	eCSSUnit_Unset == values[0].GetUnit()) { // illegal data
michael@0	11247	return false;
michael@0	11248	}
michael@0	11249	if ((found & 1) == 0) {
michael@0	11250	// Provide default font-style
michael@0	11251	values[0].SetIntValue(NS_FONT_STYLE_NORMAL, eCSSUnit_Enumerated);
michael@0	11252	}
michael@0	11253	if ((found & 2) == 0) {
michael@0	11254	// Provide default font-variant
michael@0	11255	values[1].SetIntValue(NS_FONT_VARIANT_NORMAL, eCSSUnit_Enumerated);
michael@0	11256	}
michael@0	11257	if ((found & 4) == 0) {
michael@0	11258	// Provide default font-weight
michael@0	11259	values[2].SetIntValue(NS_FONT_WEIGHT_NORMAL, eCSSUnit_Enumerated);
michael@0	11260	}
michael@0	11261
michael@0	11262	// Get mandatory font-size
michael@0	11263	nsCSSValue size;
michael@0	11264	if (! ParseNonNegativeVariant(size, VARIANT_KEYWORD | VARIANT_LP,
michael@0	11265	nsCSSProps::kFontSizeKTable)) {
michael@0	11266	return false;
michael@0	11267	}
michael@0	11268
michael@0	11269	// Get optional "/" line-height
michael@0	11270	nsCSSValue lineHeight;
michael@0	11271	if (ExpectSymbol('/', true)) {
michael@0	11272	if (! ParseNonNegativeVariant(lineHeight,
michael@0	11273	VARIANT_NUMBER | VARIANT_LP | VARIANT_NORMAL,
michael@0	11274	nullptr)) {
michael@0	11275	return false;
michael@0	11276	}
michael@0	11277	}
michael@0	11278	else {
michael@0	11279	lineHeight.SetNormalValue();
michael@0	11280	}
michael@0	11281
michael@0	11282	// Get final mandatory font-family
michael@0	11283	nsAutoParseCompoundProperty compound(this);
michael@0	11284	if (ParseFamily(family)) {
michael@0	11285	if (eCSSUnit_Inherit != family.GetUnit() &&
michael@0	11286	eCSSUnit_Initial != family.GetUnit() &&
michael@0	11287	eCSSUnit_Unset != family.GetUnit()) {
michael@0	11288	AppendValue(eCSSProperty__x_system_font, nsCSSValue(eCSSUnit_None));
michael@0	11289	AppendValue(eCSSProperty_font_family, family);
michael@0	11290	AppendValue(eCSSProperty_font_style, values[0]);
michael@0	11291	AppendValue(eCSSProperty_font_variant, values[1]);
michael@0	11292	AppendValue(eCSSProperty_font_weight, values[2]);
michael@0	11293	AppendValue(eCSSProperty_font_size, size);
michael@0	11294	AppendValue(eCSSProperty_line_height, lineHeight);
michael@0	11295	AppendValue(eCSSProperty_font_stretch,
michael@0	11296	nsCSSValue(NS_FONT_STRETCH_NORMAL, eCSSUnit_Enumerated));
michael@0	11297	AppendValue(eCSSProperty_font_size_adjust, nsCSSValue(eCSSUnit_None));
michael@0	11298	AppendValue(eCSSProperty_font_feature_settings, nsCSSValue(eCSSUnit_Normal));
michael@0	11299	AppendValue(eCSSProperty_font_language_override, nsCSSValue(eCSSUnit_Normal));
michael@0	11300	if (featuresEnabled) {
michael@0	11301	AppendValue(eCSSProperty_font_kerning,
michael@0	11302	nsCSSValue(NS_FONT_KERNING_AUTO, eCSSUnit_Enumerated));
michael@0	11303	AppendValue(eCSSProperty_font_synthesis,
michael@0	11304	nsCSSValue(NS_FONT_SYNTHESIS_WEIGHT | NS_FONT_SYNTHESIS_STYLE,
michael@0	11305	eCSSUnit_Enumerated));
michael@0	11306	AppendValue(eCSSProperty_font_variant_alternates,
michael@0	11307	nsCSSValue(eCSSUnit_Normal));
michael@0	11308	AppendValue(eCSSProperty_font_variant_caps, nsCSSValue(eCSSUnit_Normal));
michael@0	11309	AppendValue(eCSSProperty_font_variant_east_asian,
michael@0	11310	nsCSSValue(eCSSUnit_Normal));
michael@0	11311	AppendValue(eCSSProperty_font_variant_ligatures,
michael@0	11312	nsCSSValue(eCSSUnit_Normal));
michael@0	11313	AppendValue(eCSSProperty_font_variant_numeric,
michael@0	11314	nsCSSValue(eCSSUnit_Normal));
michael@0	11315	AppendValue(eCSSProperty_font_variant_position,
michael@0	11316	nsCSSValue(eCSSUnit_Normal));
michael@0	11317	}
michael@0	11318	return true;
michael@0	11319	}
michael@0	11320	}
michael@0	11321	return false;
michael@0	11322	}
michael@0	11323
michael@0	11324	bool
michael@0	11325	CSSParserImpl::ParseFontSynthesis(nsCSSValue& aValue)
michael@0	11326	{
michael@0	11327	if (!ParseVariant(aValue, VARIANT_HK | VARIANT_NONE,
michael@0	11328	nsCSSProps::kFontSynthesisKTable)) {
michael@0	11329	return false;
michael@0	11330	}
michael@0	11331
michael@0	11332	// first value 'none' ==> done
michael@0	11333	if (eCSSUnit_None == aValue.GetUnit() ||
michael@0	11334	eCSSUnit_Initial == aValue.GetUnit() ||
michael@0	11335	eCSSUnit_Inherit == aValue.GetUnit() ||
michael@0	11336	eCSSUnit_Unset == aValue.GetUnit())
michael@0	11337	{
michael@0	11338	return true;
michael@0	11339	}
michael@0	11340
michael@0	11341	// look for a second value
michael@0	11342	int32_t intValue = aValue.GetIntValue();
michael@0	11343	nsCSSValue nextValue;
michael@0	11344
michael@0	11345	if (ParseEnum(nextValue, nsCSSProps::kFontSynthesisKTable)) {
michael@0	11346	int32_t nextIntValue = nextValue.GetIntValue();
michael@0	11347	if (nextIntValue & intValue) {
michael@0	11348	return false;
michael@0	11349	}
michael@0	11350	aValue.SetIntValue(nextIntValue | intValue, eCSSUnit_Enumerated);
michael@0	11351	}
michael@0	11352
michael@0	11353	return true;
michael@0	11354	}
michael@0	11355
michael@0	11356	// font-variant-alternates allows for a combination of multiple
michael@0	11357	// simple enumerated values and functional values. Functional values have
michael@0	11358	// parameter lists with one or more idents which are later resolved
michael@0	11359	// based on values defined in @font-feature-value rules.
michael@0	11360	//
michael@0	11361	// font-variant-alternates: swash(flowing), historical-forms, styleset(alt-g, alt-m);
michael@0	11362	//
michael@0	11363	// So for this the nsCSSValue is set to a pair value, with one
michael@0	11364	// value for a bitmask of both simple and functional property values
michael@0	11365	// and another value containing a ValuePairList with lists of idents
michael@0	11366	// for each functional property value.
michael@0	11367	//
michael@0	11368	// pairValue
michael@0	11369	// o intValue
michael@0	11370	// NS_FONT_VARIANT_ALTERNATES_SWASH |
michael@0	11371	// NS_FONT_VARIANT_ALTERNATES_STYLESET
michael@0	11372	// o valuePairList, each element with
michael@0	11373	// - intValue - indicates which alternate
michael@0	11374	// - string or valueList of strings
michael@0	11375	//
michael@0	11376	// Note: when only 'historical-forms' is specified, there are no
michael@0	11377	// functional values to store, in which case the valuePairList is a
michael@0	11378	// single element dummy list. In all other cases, the length of the
michael@0	11379	// list will match the number of functional values.
michael@0	11380
michael@0	11381	#define MAX_ALLOWED_FEATURES 512
michael@0	11382
michael@0	11383	bool
michael@0	11384	CSSParserImpl::ParseSingleAlternate(int32_t& aWhichFeature,
michael@0	11385	nsCSSValue& aValue)
michael@0	11386	{
michael@0	11387	if (!GetToken(true)) {
michael@0	11388	return false;
michael@0	11389	}
michael@0	11390
michael@0	11391	bool isIdent = (mToken.mType == eCSSToken_Ident);
michael@0	11392	if (mToken.mType != eCSSToken_Function && !isIdent) {
michael@0	11393	UngetToken();
michael@0	11394	return false;
michael@0	11395	}
michael@0	11396
michael@0	11397	// ident ==> simple enumerated prop val (e.g. historical-forms)
michael@0	11398	// function ==> e.g. swash(flowing) styleset(alt-g, alt-m)
michael@0	11399
michael@0	11400	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
michael@0	11401	if (!(eCSSKeyword_UNKNOWN < keyword &&
michael@0	11402	nsCSSProps::FindKeyword(keyword,
michael@0	11403	(isIdent ?
michael@0	11404	nsCSSProps::kFontVariantAlternatesKTable :
michael@0	11405	nsCSSProps::kFontVariantAlternatesFuncsKTable),
michael@0	11406	aWhichFeature)))
michael@0	11407	{
michael@0	11408	// failed, pop token
michael@0	11409	UngetToken();
michael@0	11410	return false;
michael@0	11411	}
michael@0	11412
michael@0	11413	if (isIdent) {
michael@0	11414	aValue.SetIntValue(aWhichFeature, eCSSUnit_Enumerated);
michael@0	11415	return true;
michael@0	11416	}
michael@0	11417
michael@0	11418	uint16_t maxElems = 1;
michael@0	11419	if (keyword == eCSSKeyword_styleset ||
michael@0	11420	keyword == eCSSKeyword_character_variant) {
michael@0	11421	maxElems = MAX_ALLOWED_FEATURES;
michael@0	11422	}
michael@0	11423	return ParseFunction(keyword, nullptr, VARIANT_IDENTIFIER,
michael@0	11424	1, maxElems, aValue);
michael@0	11425	}
michael@0	11426
michael@0	11427	bool
michael@0	11428	CSSParserImpl::ParseFontVariantAlternates(nsCSSValue& aValue)
michael@0	11429	{
michael@0	11430	if (ParseVariant(aValue, VARIANT_INHERIT | VARIANT_NORMAL, nullptr)) {
michael@0	11431	return true;
michael@0	11432	}
michael@0	11433
michael@0	11434	// iterate through parameters
michael@0	11435	nsCSSValue listValue;
michael@0	11436	int32_t feature, featureFlags = 0;
michael@0	11437
michael@0	11438	// if no functional values, this may be a list with a single, unused element
michael@0	11439	listValue.SetListValue();
michael@0	11440
michael@0	11441	nsCSSValueList* list = nullptr;
michael@0	11442	nsCSSValue value;
michael@0	11443	while (ParseSingleAlternate(feature, value)) {
michael@0	11444
michael@0	11445	// check to make sure value not already set
michael@0	11446	if (feature == 0 ||
michael@0	11447	feature & featureFlags) {
michael@0	11448	return false;
michael@0	11449	}
michael@0	11450
michael@0	11451	featureFlags |= feature;
michael@0	11452
michael@0	11453	// if function, need to add to the list of functions
michael@0	11454	if (value.GetUnit() == eCSSUnit_Function) {
michael@0	11455	if (!list) {
michael@0	11456	list = listValue.GetListValue();
michael@0	11457	} else {
michael@0	11458	list->mNext = new nsCSSValueList;
michael@0	11459	list = list->mNext;
michael@0	11460	}
michael@0	11461	list->mValue = value;
michael@0	11462	}
michael@0	11463	}
michael@0	11464
michael@0	11465	if (featureFlags == 0) {
michael@0	11466	// ParseSingleAlternate failed the first time through the loop.
michael@0	11467	return false;
michael@0	11468	}
michael@0	11469
michael@0	11470	nsCSSValue featureValue;
michael@0	11471	featureValue.SetIntValue(featureFlags, eCSSUnit_Enumerated);
michael@0	11472	aValue.SetPairValue(featureValue, listValue);
michael@0	11473
michael@0	11474	return true;
michael@0	11475	}
michael@0	11476
michael@0	11477	// aMasks - array of masks for mutually-exclusive property values,
michael@0	11478	// e.g. proportial-nums, tabular-nums
michael@0	11479
michael@0	11480	bool
michael@0	11481	CSSParserImpl::ParseBitmaskValues(nsCSSValue& aValue,
michael@0	11482	const KTableValue aKeywordTable[],
michael@0	11483	const int32_t aMasks[])
michael@0	11484	{
michael@0	11485	// Parse at least one keyword
michael@0	11486	if (!ParseEnum(aValue, aKeywordTable)) {
michael@0	11487	return false;
michael@0	11488	}
michael@0	11489
michael@0	11490	// look for more values
michael@0	11491	nsCSSValue nextValue;
michael@0	11492	int32_t mergedValue = aValue.GetIntValue();
michael@0	11493
michael@0	11494	while (ParseEnum(nextValue, aKeywordTable))
michael@0	11495	{
michael@0	11496	int32_t nextIntValue = nextValue.GetIntValue();
michael@0	11497
michael@0	11498	// check to make sure value not already set
michael@0	11499	if (nextIntValue & mergedValue) {
michael@0	11500	return false;
michael@0	11501	}
michael@0	11502
michael@0	11503	const int32_t *m = aMasks;
michael@0	11504	int32_t c = 0;
michael@0	11505
michael@0	11506	while (*m != MASK_END_VALUE) {
michael@0	11507	if (*m & nextIntValue) {
michael@0	11508	c = mergedValue & *m;
michael@0	11509	break;
michael@0	11510	}
michael@0	11511	m++;
michael@0	11512	}
michael@0	11513
michael@0	11514	if (c) {
michael@0	11515	return false;
michael@0	11516	}
michael@0	11517
michael@0	11518	mergedValue |= nextIntValue;
michael@0	11519	}
michael@0	11520
michael@0	11521	aValue.SetIntValue(mergedValue, eCSSUnit_Enumerated);
michael@0	11522
michael@0	11523	return true;
michael@0	11524	}
michael@0	11525
michael@0	11526	static const int32_t maskEastAsian[] = {
michael@0	11527	NS_FONT_VARIANT_EAST_ASIAN_VARIANT_MASK,
michael@0	11528	NS_FONT_VARIANT_EAST_ASIAN_WIDTH_MASK,
michael@0	11529	MASK_END_VALUE
michael@0	11530	};
michael@0	11531
michael@0	11532	bool
michael@0	11533	CSSParserImpl::ParseFontVariantEastAsian(nsCSSValue& aValue)
michael@0	11534	{
michael@0	11535	if (ParseVariant(aValue, VARIANT_INHERIT | VARIANT_NORMAL, nullptr)) {
michael@0	11536	return true;
michael@0	11537	}
michael@0	11538
michael@0	11539	NS_ASSERTION(maskEastAsian[ArrayLength(maskEastAsian) - 1] ==
michael@0	11540	MASK_END_VALUE,
michael@0	11541	"incorrectly terminated array");
michael@0	11542
michael@0	11543	return ParseBitmaskValues(aValue, nsCSSProps::kFontVariantEastAsianKTable,
michael@0	11544	maskEastAsian);
michael@0	11545	}
michael@0	11546
michael@0	11547	static const int32_t maskLigatures[] = {
michael@0	11548	NS_FONT_VARIANT_LIGATURES_COMMON_MASK,
michael@0	11549	NS_FONT_VARIANT_LIGATURES_DISCRETIONARY_MASK,
michael@0	11550	NS_FONT_VARIANT_LIGATURES_HISTORICAL_MASK,
michael@0	11551	NS_FONT_VARIANT_LIGATURES_CONTEXTUAL_MASK,
michael@0	11552	MASK_END_VALUE
michael@0	11553	};
michael@0	11554
michael@0	11555	bool
michael@0	11556	CSSParserImpl::ParseFontVariantLigatures(nsCSSValue& aValue)
michael@0	11557	{
michael@0	11558	if (ParseVariant(aValue, VARIANT_INHERIT | VARIANT_NORMAL, nullptr)) {
michael@0	11559	return true;
michael@0	11560	}
michael@0	11561
michael@0	11562	NS_ASSERTION(maskLigatures[ArrayLength(maskLigatures) - 1] ==
michael@0	11563	MASK_END_VALUE,
michael@0	11564	"incorrectly terminated array");
michael@0	11565
michael@0	11566	bool parsed =
michael@0	11567	ParseBitmaskValues(aValue, nsCSSProps::kFontVariantLigaturesKTable,
michael@0	11568	maskLigatures);
michael@0	11569
michael@0	11570	// if none value included, no other values are possible
michael@0	11571	if (parsed && eCSSUnit_Enumerated == aValue.GetUnit()) {
michael@0	11572	int32_t val = aValue.GetIntValue();
michael@0	11573	if ((val & NS_FONT_VARIANT_LIGATURES_NONE) &&
michael@0	11574	(val & ~int32_t(NS_FONT_VARIANT_LIGATURES_NONE))) {
michael@0	11575	parsed = false;
michael@0	11576	}
michael@0	11577	}
michael@0	11578
michael@0	11579	return parsed;
michael@0	11580	}
michael@0	11581
michael@0	11582	static const int32_t maskNumeric[] = {
michael@0	11583	NS_FONT_VARIANT_NUMERIC_FIGURE_MASK,
michael@0	11584	NS_FONT_VARIANT_NUMERIC_SPACING_MASK,
michael@0	11585	NS_FONT_VARIANT_NUMERIC_FRACTION_MASK,
michael@0	11586	MASK_END_VALUE
michael@0	11587	};
michael@0	11588
michael@0	11589	bool
michael@0	11590	CSSParserImpl::ParseFontVariantNumeric(nsCSSValue& aValue)
michael@0	11591	{
michael@0	11592	if (ParseVariant(aValue, VARIANT_INHERIT | VARIANT_NORMAL, nullptr)) {
michael@0	11593	return true;
michael@0	11594	}
michael@0	11595
michael@0	11596	NS_ASSERTION(maskNumeric[ArrayLength(maskNumeric) - 1] ==
michael@0	11597	MASK_END_VALUE,
michael@0	11598	"incorrectly terminated array");
michael@0	11599
michael@0	11600	return ParseBitmaskValues(aValue, nsCSSProps::kFontVariantNumericKTable,
michael@0	11601	maskNumeric);
michael@0	11602	}
michael@0	11603
michael@0	11604	bool
michael@0	11605	CSSParserImpl::ParseFontWeight(nsCSSValue& aValue)
michael@0	11606	{
michael@0	11607	if (ParseVariant(aValue, VARIANT_HKI | VARIANT_SYSFONT,
michael@0	11608	nsCSSProps::kFontWeightKTable)) {
michael@0	11609	if (eCSSUnit_Integer == aValue.GetUnit()) { // ensure unit value
michael@0	11610	int32_t intValue = aValue.GetIntValue();
michael@0	11611	if ((100 <= intValue) &&
michael@0	11612	(intValue <= 900) &&
michael@0	11613	(0 == (intValue % 100))) {
michael@0	11614	return true;
michael@0	11615	} else {
michael@0	11616	UngetToken();
michael@0	11617	return false;
michael@0	11618	}
michael@0	11619	}
michael@0	11620	return true;
michael@0	11621	}
michael@0	11622	return false;
michael@0	11623	}
michael@0	11624
michael@0	11625	bool
michael@0	11626	CSSParserImpl::ParseOneFamily(nsAString& aFamily, bool& aOneKeyword)
michael@0	11627	{
michael@0	11628	if (!GetToken(true))
michael@0	11629	return false;
michael@0	11630
michael@0	11631	nsCSSToken* tk = &mToken;
michael@0	11632
michael@0	11633	aOneKeyword = false;
michael@0	11634	if (eCSSToken_Ident == tk->mType) {
michael@0	11635	aOneKeyword = true;
michael@0	11636	aFamily.Append(tk->mIdent);
michael@0	11637	for (;;) {
michael@0	11638	if (!GetToken(false))
michael@0	11639	break;
michael@0	11640
michael@0	11641	if (eCSSToken_Ident == tk->mType) {
michael@0	11642	aOneKeyword = false;
michael@0	11643	// We had at least another keyword before.
michael@0	11644	// "If a sequence of identifiers is given as a font family name,
michael@0	11645	// the computed value is the name converted to a string by joining
michael@0	11646	// all the identifiers in the sequence by single spaces."
michael@0	11647	// -- CSS 2.1, section 15.3
michael@0	11648	// Whitespace tokens do not actually matter,
michael@0	11649	// identifier tokens can be separated by comments.
michael@0	11650	aFamily.Append(char16_t(' '));
michael@0	11651	aFamily.Append(tk->mIdent);
michael@0	11652	} else if (eCSSToken_Whitespace != tk->mType) {
michael@0	11653	UngetToken();
michael@0	11654	break;
michael@0	11655	}
michael@0	11656	}
michael@0	11657	return true;
michael@0	11658
michael@0	11659	} else if (eCSSToken_String == tk->mType) {
michael@0	11660	aFamily.Append(tk->mSymbol); // replace the quotes
michael@0	11661	aFamily.Append(tk->mIdent); // XXX What if it had escaped quotes?
michael@0	11662	aFamily.Append(tk->mSymbol);
michael@0	11663	return true;
michael@0	11664
michael@0	11665	} else {
michael@0	11666	UngetToken();
michael@0	11667	return false;
michael@0	11668	}
michael@0	11669	}
michael@0	11670
michael@0	11671	bool
michael@0	11672	CSSParserImpl::ParseFamily(nsCSSValue& aValue)
michael@0	11673	{
michael@0	11674	nsAutoString family;
michael@0	11675	bool single;
michael@0	11676
michael@0	11677	// keywords only have meaning in the first position
michael@0	11678	if (!ParseOneFamily(family, single))
michael@0	11679	return false;
michael@0	11680
michael@0	11681	// check for keywords, but only when keywords appear by themselves
michael@0	11682	// i.e. not in compounds such as font-family: default blah;
michael@0	11683	if (single) {
michael@0	11684	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(family);
michael@0	11685	if (keyword == eCSSKeyword_inherit) {
michael@0	11686	aValue.SetInheritValue();
michael@0	11687	return true;
michael@0	11688	}
michael@0	11689	// 605231 - don't parse unquoted 'default' reserved keyword
michael@0	11690	if (keyword == eCSSKeyword_default) {
michael@0	11691	return false;
michael@0	11692	}
michael@0	11693	if (keyword == eCSSKeyword_initial) {
michael@0	11694	aValue.SetInitialValue();
michael@0	11695	return true;
michael@0	11696	}
michael@0	11697	if (keyword == eCSSKeyword_unset &&
michael@0	11698	nsLayoutUtils::UnsetValueEnabled()) {
michael@0	11699	aValue.SetUnsetValue();
michael@0	11700	return true;
michael@0	11701	}
michael@0	11702	if (keyword == eCSSKeyword__moz_use_system_font &&
michael@0	11703	!IsParsingCompoundProperty()) {
michael@0	11704	aValue.SetSystemFontValue();
michael@0	11705	return true;
michael@0	11706	}
michael@0	11707	}
michael@0	11708
michael@0	11709	for (;;) {
michael@0	11710	if (!ExpectSymbol(',', true))
michael@0	11711	break;
michael@0	11712
michael@0	11713	family.Append(char16_t(','));
michael@0	11714
michael@0	11715	nsAutoString nextFamily;
michael@0	11716	if (!ParseOneFamily(nextFamily, single))
michael@0	11717	return false;
michael@0	11718
michael@0	11719	// at this point unquoted keywords are not allowed
michael@0	11720	// as font family names but can appear within names
michael@0	11721	if (single) {
michael@0	11722	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(nextFamily);
michael@0	11723	switch (keyword) {
michael@0	11724	case eCSSKeyword_inherit:
michael@0	11725	case eCSSKeyword_initial:
michael@0	11726	case eCSSKeyword_default:
michael@0	11727	case eCSSKeyword__moz_use_system_font:
michael@0	11728	return false;
michael@0	11729	case eCSSKeyword_unset:
michael@0	11730	if (nsLayoutUtils::UnsetValueEnabled()) {
michael@0	11731	return false;
michael@0	11732	}
michael@0	11733	// fall through
michael@0	11734	default:
michael@0	11735	break;
michael@0	11736	}
michael@0	11737	}
michael@0	11738
michael@0	11739	family.Append(nextFamily);
michael@0	11740	}
michael@0	11741
michael@0	11742	if (family.IsEmpty()) {
michael@0	11743	return false;
michael@0	11744	}
michael@0	11745	aValue.SetStringValue(family, eCSSUnit_Families);
michael@0	11746	return true;
michael@0	11747	}
michael@0	11748
michael@0	11749	// src: ( uri-src | local-src ) (',' ( uri-src | local-src ) )*
michael@0	11750	// uri-src: uri [ 'format(' string ( ',' string )* ')' ]
michael@0	11751	// local-src: 'local(' ( string | ident ) ')'
michael@0	11752
michael@0	11753	bool
michael@0	11754	CSSParserImpl::ParseFontSrc(nsCSSValue& aValue)
michael@0	11755	{
michael@0	11756	// could we maybe turn nsCSSValue::Array into InfallibleTArray<nsCSSValue>?
michael@0	11757	InfallibleTArray<nsCSSValue> values;
michael@0	11758	nsCSSValue cur;
michael@0	11759	for (;;) {
michael@0	11760	if (!GetToken(true))
michael@0	11761	break;
michael@0	11762
michael@0	11763	if (mToken.mType == eCSSToken_URL) {
michael@0	11764	SetValueToURL(cur, mToken.mIdent);
michael@0	11765	values.AppendElement(cur);
michael@0	11766	if (!ParseFontSrcFormat(values))
michael@0	11767	return false;
michael@0	11768
michael@0	11769	} else if (mToken.mType == eCSSToken_Function &&
michael@0	11770	mToken.mIdent.LowerCaseEqualsLiteral("local")) {
michael@0	11771	// css3-fonts does not specify a formal grammar for local().
michael@0	11772	// The text permits both unquoted identifiers and quoted
michael@0	11773	// strings. We resolve this ambiguity in the spec by
michael@0	11774	// assuming that the appropriate production is a single
michael@0	11775	// <family-name>, possibly surrounded by whitespace.
michael@0	11776
michael@0	11777	nsAutoString family;
michael@0	11778	bool single;
michael@0	11779	if (!ParseOneFamily(family, single)) {
michael@0	11780	SkipUntil(')');
michael@0	11781	return false;
michael@0	11782	}
michael@0	11783	if (!ExpectSymbol(')', true)) {
michael@0	11784	SkipUntil(')');
michael@0	11785	return false;
michael@0	11786	}
michael@0	11787
michael@0	11788	// XXX: Getting closer...
michael@0	11789	// the style parameters to the nsFont constructor are ignored,
michael@0	11790	// because it's only being used to call EnumerateFamilies
michael@0	11791	nsFont font(family, 0, 0, 0, 0, 0, 0);
michael@0	11792	ExtractFirstFamilyData dat;
michael@0	11793
michael@0	11794	font.EnumerateFamilies(ExtractFirstFamily, (void*) &dat);
michael@0	11795	if (!dat.mGood)
michael@0	11796	return false;
michael@0	11797
michael@0	11798	cur.SetStringValue(dat.mFamilyName, eCSSUnit_Local_Font);
michael@0	11799	values.AppendElement(cur);
michael@0	11800	} else {
michael@0	11801	// We don't know what to do with this token; unget it and error out
michael@0	11802	UngetToken();
michael@0	11803	return false;
michael@0	11804	}
michael@0	11805
michael@0	11806	if (!ExpectSymbol(',', true))
michael@0	11807	break;
michael@0	11808	}
michael@0	11809
michael@0	11810	if (values.Length() == 0)
michael@0	11811	return false;
michael@0	11812
michael@0	11813	nsRefPtr<nsCSSValue::Array> srcVals
michael@0	11814	= nsCSSValue::Array::Create(values.Length());
michael@0	11815
michael@0	11816	uint32_t i;
michael@0	11817	for (i = 0; i < values.Length(); i++)
michael@0	11818	srcVals->Item(i) = values[i];
michael@0	11819	aValue.SetArrayValue(srcVals, eCSSUnit_Array);
michael@0	11820	return true;
michael@0	11821	}
michael@0	11822
michael@0	11823	bool
michael@0	11824	CSSParserImpl::ParseFontSrcFormat(InfallibleTArray<nsCSSValue> & values)
michael@0	11825	{
michael@0	11826	if (!GetToken(true))
michael@0	11827	return true; // EOF harmless here
michael@0	11828	if (mToken.mType != eCSSToken_Function ||
michael@0	11829	!mToken.mIdent.LowerCaseEqualsLiteral("format")) {
michael@0	11830	UngetToken();
michael@0	11831	return true;
michael@0	11832	}
michael@0	11833
michael@0	11834	do {
michael@0	11835	if (!GetToken(true))
michael@0	11836	return false; // EOF - no need for SkipUntil
michael@0	11837
michael@0	11838	if (mToken.mType != eCSSToken_String) {
michael@0	11839	UngetToken();
michael@0	11840	SkipUntil(')');
michael@0	11841	return false;
michael@0	11842	}
michael@0	11843
michael@0	11844	nsCSSValue cur(mToken.mIdent, eCSSUnit_Font_Format);
michael@0	11845	values.AppendElement(cur);
michael@0	11846	} while (ExpectSymbol(',', true));
michael@0	11847
michael@0	11848	if (!ExpectSymbol(')', true)) {
michael@0	11849	SkipUntil(')');
michael@0	11850	return false;
michael@0	11851	}
michael@0	11852
michael@0	11853	return true;
michael@0	11854	}
michael@0	11855
michael@0	11856	// font-ranges: urange ( ',' urange )*
michael@0	11857	bool
michael@0	11858	CSSParserImpl::ParseFontRanges(nsCSSValue& aValue)
michael@0	11859	{
michael@0	11860	InfallibleTArray<uint32_t> ranges;
michael@0	11861	for (;;) {
michael@0	11862	if (!GetToken(true))
michael@0	11863	break;
michael@0	11864
michael@0	11865	if (mToken.mType != eCSSToken_URange) {
michael@0	11866	UngetToken();
michael@0	11867	break;
michael@0	11868	}
michael@0	11869
michael@0	11870	// An invalid range token is a parsing error, causing the entire
michael@0	11871	// descriptor to be ignored.
michael@0	11872	if (!mToken.mIntegerValid)
michael@0	11873	return false;
michael@0	11874
michael@0	11875	uint32_t low = mToken.mInteger;
michael@0	11876	uint32_t high = mToken.mInteger2;
michael@0	11877
michael@0	11878	// A range that descends, or a range that is entirely outside the
michael@0	11879	// current range of Unicode (U+0-10FFFF) is ignored, but does not
michael@0	11880	// invalidate the descriptor. A range that straddles the high end
michael@0	11881	// is clipped.
michael@0	11882	if (low <= 0x10FFFF && low <= high) {
michael@0	11883	if (high > 0x10FFFF)
michael@0	11884	high = 0x10FFFF;
michael@0	11885
michael@0	11886	ranges.AppendElement(low);
michael@0	11887	ranges.AppendElement(high);
michael@0	11888	}
michael@0	11889	if (!ExpectSymbol(',', true))
michael@0	11890	break;
michael@0	11891	}
michael@0	11892
michael@0	11893	if (ranges.Length() == 0)
michael@0	11894	return false;
michael@0	11895
michael@0	11896	nsRefPtr<nsCSSValue::Array> srcVals
michael@0	11897	= nsCSSValue::Array::Create(ranges.Length());
michael@0	11898
michael@0	11899	for (uint32_t i = 0; i < ranges.Length(); i++)
michael@0	11900	srcVals->Item(i).SetIntValue(ranges[i], eCSSUnit_Integer);
michael@0	11901	aValue.SetArrayValue(srcVals, eCSSUnit_Array);
michael@0	11902	return true;
michael@0	11903	}
michael@0	11904
michael@0	11905	// font-feature-settings: normal | <feature-tag-value> [, <feature-tag-value>]*
michael@0	11906	// <feature-tag-value> = <string> [ <integer> | on | off ]?
michael@0	11907
michael@0	11908	// minimum - "tagx", "tagy", "tagz"
michael@0	11909	// edge error case - "tagx" on 1, "tagx" "tagy", "tagx" -1, "tagx" big
michael@0	11910
michael@0	11911	// pair value is always x = string, y = int
michael@0	11912
michael@0	11913	// font feature tags must be four ASCII characters
michael@0	11914	#define FEATURE_TAG_LENGTH 4
michael@0	11915
michael@0	11916	static bool
michael@0	11917	ValidFontFeatureTag(const nsString& aTag)
michael@0	11918	{
michael@0	11919	if (aTag.Length() != FEATURE_TAG_LENGTH) {
michael@0	11920	return false;
michael@0	11921	}
michael@0	11922	uint32_t i;
michael@0	11923	for (i = 0; i < FEATURE_TAG_LENGTH; i++) {
michael@0	11924	uint32_t ch = aTag[i];
michael@0	11925	if (ch < 0x20 || ch > 0x7e) {
michael@0	11926	return false;
michael@0	11927	}
michael@0	11928	}
michael@0	11929	return true;
michael@0	11930	}
michael@0	11931
michael@0	11932	bool
michael@0	11933	CSSParserImpl::ParseFontFeatureSettings(nsCSSValue& aValue)
michael@0	11934	{
michael@0	11935	if (ParseVariant(aValue, VARIANT_INHERIT | VARIANT_NORMAL, nullptr)) {
michael@0	11936	return true;
michael@0	11937	}
michael@0	11938
michael@0	11939	nsCSSValuePairList *cur = aValue.SetPairListValue();
michael@0	11940	for (;;) {
michael@0	11941	// feature tag
michael@0	11942	if (!GetToken(true)) {
michael@0	11943	return false;
michael@0	11944	}
michael@0	11945
michael@0	11946	if (mToken.mType != eCSSToken_String ||
michael@0	11947	!ValidFontFeatureTag(mToken.mIdent)) {
michael@0	11948	UngetToken();
michael@0	11949	return false;
michael@0	11950	}
michael@0	11951	cur->mXValue.SetStringValue(mToken.mIdent, eCSSUnit_String);
michael@0	11952
michael@0	11953	if (!GetToken(true)) {
michael@0	11954	cur->mYValue.SetIntValue(1, eCSSUnit_Integer);
michael@0	11955	break;
michael@0	11956	}
michael@0	11957
michael@0	11958	// optional value or on/off keyword
michael@0	11959	if (mToken.mType == eCSSToken_Number && mToken.mIntegerValid &&
michael@0	11960	mToken.mInteger >= 0) {
michael@0	11961	cur->mYValue.SetIntValue(mToken.mInteger, eCSSUnit_Integer);
michael@0	11962	} else if (mToken.mType == eCSSToken_Ident &&
michael@0	11963	mToken.mIdent.LowerCaseEqualsLiteral("on")) {
michael@0	11964	cur->mYValue.SetIntValue(1, eCSSUnit_Integer);
michael@0	11965	} else if (mToken.mType == eCSSToken_Ident &&
michael@0	11966	mToken.mIdent.LowerCaseEqualsLiteral("off")) {
michael@0	11967	cur->mYValue.SetIntValue(0, eCSSUnit_Integer);
michael@0	11968	} else {
michael@0	11969	// something other than value/on/off, set default value
michael@0	11970	cur->mYValue.SetIntValue(1, eCSSUnit_Integer);
michael@0	11971	UngetToken();
michael@0	11972	}
michael@0	11973
michael@0	11974	if (!ExpectSymbol(',', true)) {
michael@0	11975	break;
michael@0	11976	}
michael@0	11977
michael@0	11978	cur->mNext = new nsCSSValuePairList;
michael@0	11979	cur = cur->mNext;
michael@0	11980	}
michael@0	11981
michael@0	11982	return true;
michael@0	11983	}
michael@0	11984
michael@0	11985	bool
michael@0	11986	CSSParserImpl::ParseListStyle()
michael@0	11987	{
michael@0	11988	// 'list-style' can accept 'none' for two different subproperties,
michael@0	11989	// 'list-style-type' and 'list-style-position'. In order to accept
michael@0	11990	// 'none' as the value of either but still allow another value for
michael@0	11991	// either, we need to ensure that the first 'none' we find gets
michael@0	11992	// allocated to a dummy property instead.
michael@0	11993	static const nsCSSProperty listStyleIDs[] = {
michael@0	11994	eCSSPropertyExtra_x_none_value,
michael@0	11995	eCSSProperty_list_style_type,
michael@0	11996	eCSSProperty_list_style_position,
michael@0	11997	eCSSProperty_list_style_image
michael@0	11998	};
michael@0	11999
michael@0	12000	nsCSSValue values[MOZ_ARRAY_LENGTH(listStyleIDs)];
michael@0	12001	int32_t found =
michael@0	12002	ParseChoice(values, listStyleIDs, ArrayLength(listStyleIDs));
michael@0	12003	if (found < 1) {
michael@0	12004	return false;
michael@0	12005	}
michael@0	12006
michael@0	12007	if ((found & (1|2|8)) == (1|2|8)) {
michael@0	12008	if (values[0].GetUnit() == eCSSUnit_None) {
michael@0	12009	// We found a 'none' plus another value for both of
michael@0	12010	// 'list-style-type' and 'list-style-image'. This is a parse
michael@0	12011	// error, since the 'none' has to count for at least one of them.
michael@0	12012	return false;
michael@0	12013	} else {
michael@0	12014	NS_ASSERTION(found == (1|2|4|8) && values[0] == values[1] &&
michael@0	12015	values[0] == values[2] && values[0] == values[3],
michael@0	12016	"should be a special value");
michael@0	12017	}
michael@0	12018	}
michael@0	12019
michael@0	12020	// Provide default values
michael@0	12021	if ((found & 2) == 0) {
michael@0	12022	if (found & 1) {
michael@0	12023	values[1].SetIntValue(NS_STYLE_LIST_STYLE_NONE, eCSSUnit_Enumerated);
michael@0	12024	} else {
michael@0	12025	values[1].SetIntValue(NS_STYLE_LIST_STYLE_DISC, eCSSUnit_Enumerated);
michael@0	12026	}
michael@0	12027	}
michael@0	12028	if ((found & 4) == 0) {
michael@0	12029	values[2].SetIntValue(NS_STYLE_LIST_STYLE_POSITION_OUTSIDE,
michael@0	12030	eCSSUnit_Enumerated);
michael@0	12031	}
michael@0	12032	if ((found & 8) == 0) {
michael@0	12033	values[3].SetNoneValue();
michael@0	12034	}
michael@0	12035
michael@0	12036	// Start at 1 to avoid appending fake value.
michael@0	12037	for (uint32_t index = 1; index < ArrayLength(listStyleIDs); ++index) {
michael@0	12038	AppendValue(listStyleIDs[index], values[index]);
michael@0	12039	}
michael@0	12040	return true;
michael@0	12041	}
michael@0	12042
michael@0	12043	bool
michael@0	12044	CSSParserImpl::ParseMargin()
michael@0	12045	{
michael@0	12046	static const nsCSSProperty kMarginSideIDs[] = {
michael@0	12047	eCSSProperty_margin_top,
michael@0	12048	eCSSProperty_margin_right_value,
michael@0	12049	eCSSProperty_margin_bottom,
michael@0	12050	eCSSProperty_margin_left_value
michael@0	12051	};
michael@0	12052	static const nsCSSProperty kMarginSources[] = {
michael@0	12053	eCSSProperty_margin_left_ltr_source,
michael@0	12054	eCSSProperty_margin_left_rtl_source,
michael@0	12055	eCSSProperty_margin_right_ltr_source,
michael@0	12056	eCSSProperty_margin_right_rtl_source,
michael@0	12057	eCSSProperty_UNKNOWN
michael@0	12058	};
michael@0	12059
michael@0	12060	// do this now, in case 4 values weren't specified
michael@0	12061	InitBoxPropsAsPhysical(kMarginSources);
michael@0	12062	return ParseBoxProperties(kMarginSideIDs);
michael@0	12063	}
michael@0	12064
michael@0	12065	bool
michael@0	12066	CSSParserImpl::ParseMarks(nsCSSValue& aValue)
michael@0	12067	{
michael@0	12068	if (ParseVariant(aValue, VARIANT_HK, nsCSSProps::kPageMarksKTable)) {
michael@0	12069	if (eCSSUnit_Enumerated == aValue.GetUnit()) {
michael@0	12070	if (NS_STYLE_PAGE_MARKS_NONE != aValue.GetIntValue() &&
michael@0	12071	false == CheckEndProperty()) {
michael@0	12072	nsCSSValue second;
michael@0	12073	if (ParseEnum(second, nsCSSProps::kPageMarksKTable)) {
michael@0	12074	// 'none' keyword in conjuction with others is not allowed
michael@0	12075	if (NS_STYLE_PAGE_MARKS_NONE != second.GetIntValue()) {
michael@0	12076	aValue.SetIntValue(aValue.GetIntValue() | second.GetIntValue(),
michael@0	12077	eCSSUnit_Enumerated);
michael@0	12078	return true;
michael@0	12079	}
michael@0	12080	}
michael@0	12081	return false;
michael@0	12082	}
michael@0	12083	}
michael@0	12084	return true;
michael@0	12085	}
michael@0	12086	return false;
michael@0	12087	}
michael@0	12088
michael@0	12089	bool
michael@0	12090	CSSParserImpl::ParseOutline()
michael@0	12091	{
michael@0	12092	const int32_t numProps = 3;
michael@0	12093	static const nsCSSProperty kOutlineIDs[] = {
michael@0	12094	eCSSProperty_outline_color,
michael@0	12095	eCSSProperty_outline_style,
michael@0	12096	eCSSProperty_outline_width
michael@0	12097	};
michael@0	12098
michael@0	12099	nsCSSValue values[numProps];
michael@0	12100	int32_t found = ParseChoice(values, kOutlineIDs, numProps);
michael@0	12101	if (found < 1) {
michael@0	12102	return false;
michael@0	12103	}
michael@0	12104
michael@0	12105	// Provide default values
michael@0	12106	if ((found & 1) == 0) { // Provide default outline-color
michael@0	12107	values[0].SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR, eCSSUnit_Enumerated);
michael@0	12108	}
michael@0	12109	if ((found & 2) == 0) { // Provide default outline-style
michael@0	12110	values[1].SetIntValue(NS_STYLE_BORDER_STYLE_NONE, eCSSUnit_Enumerated);
michael@0	12111	}
michael@0	12112	if ((found & 4) == 0) { // Provide default outline-width
michael@0	12113	values[2].SetIntValue(NS_STYLE_BORDER_WIDTH_MEDIUM, eCSSUnit_Enumerated);
michael@0	12114	}
michael@0	12115
michael@0	12116	int32_t index;
michael@0	12117	for (index = 0; index < numProps; index++) {
michael@0	12118	AppendValue(kOutlineIDs[index], values[index]);
michael@0	12119	}
michael@0	12120	return true;
michael@0	12121	}
michael@0	12122
michael@0	12123	bool
michael@0	12124	CSSParserImpl::ParseOverflow()
michael@0	12125	{
michael@0	12126	nsCSSValue overflow;
michael@0	12127	if (!ParseVariant(overflow, VARIANT_HK, nsCSSProps::kOverflowKTable)) {
michael@0	12128	return false;
michael@0	12129	}
michael@0	12130
michael@0	12131	nsCSSValue overflowX(overflow);
michael@0	12132	nsCSSValue overflowY(overflow);
michael@0	12133	if (eCSSUnit_Enumerated == overflow.GetUnit())
michael@0	12134	switch(overflow.GetIntValue()) {
michael@0	12135	case NS_STYLE_OVERFLOW_SCROLLBARS_HORIZONTAL:
michael@0	12136	overflowX.SetIntValue(NS_STYLE_OVERFLOW_SCROLL, eCSSUnit_Enumerated);
michael@0	12137	overflowY.SetIntValue(NS_STYLE_OVERFLOW_HIDDEN, eCSSUnit_Enumerated);
michael@0	12138	break;
michael@0	12139	case NS_STYLE_OVERFLOW_SCROLLBARS_VERTICAL:
michael@0	12140	overflowX.SetIntValue(NS_STYLE_OVERFLOW_HIDDEN, eCSSUnit_Enumerated);
michael@0	12141	overflowY.SetIntValue(NS_STYLE_OVERFLOW_SCROLL, eCSSUnit_Enumerated);
michael@0	12142	break;
michael@0	12143	}
michael@0	12144	AppendValue(eCSSProperty_overflow_x, overflowX);
michael@0	12145	AppendValue(eCSSProperty_overflow_y, overflowY);
michael@0	12146	return true;
michael@0	12147	}
michael@0	12148
michael@0	12149	bool
michael@0	12150	CSSParserImpl::ParsePadding()
michael@0	12151	{
michael@0	12152	static const nsCSSProperty kPaddingSideIDs[] = {
michael@0	12153	eCSSProperty_padding_top,
michael@0	12154	eCSSProperty_padding_right_value,
michael@0	12155	eCSSProperty_padding_bottom,
michael@0	12156	eCSSProperty_padding_left_value
michael@0	12157	};
michael@0	12158	static const nsCSSProperty kPaddingSources[] = {
michael@0	12159	eCSSProperty_padding_left_ltr_source,
michael@0	12160	eCSSProperty_padding_left_rtl_source,
michael@0	12161	eCSSProperty_padding_right_ltr_source,
michael@0	12162	eCSSProperty_padding_right_rtl_source,
michael@0	12163	eCSSProperty_UNKNOWN
michael@0	12164	};
michael@0	12165
michael@0	12166	// do this now, in case 4 values weren't specified
michael@0	12167	InitBoxPropsAsPhysical(kPaddingSources);
michael@0	12168	return ParseBoxProperties(kPaddingSideIDs);
michael@0	12169	}
michael@0	12170
michael@0	12171	bool
michael@0	12172	CSSParserImpl::ParseQuotes()
michael@0	12173	{
michael@0	12174	nsCSSValue value;
michael@0	12175	if (!ParseVariant(value, VARIANT_HOS, nullptr)) {
michael@0	12176	return false;
michael@0	12177	}
michael@0	12178	if (value.GetUnit() == eCSSUnit_String) {
michael@0	12179	nsCSSValue open = value;
michael@0	12180	nsCSSValuePairList* quotes = value.SetPairListValue();
michael@0	12181	for (;;) {
michael@0	12182	quotes->mXValue = open;
michael@0	12183	// get mandatory close
michael@0	12184	if (!ParseVariant(quotes->mYValue, VARIANT_STRING, nullptr)) {
michael@0	12185	return false;
michael@0	12186	}
michael@0	12187	// look for another open
michael@0	12188	if (!ParseVariant(open, VARIANT_STRING, nullptr)) {
michael@0	12189	break;
michael@0	12190	}
michael@0	12191	quotes->mNext = new nsCSSValuePairList;
michael@0	12192	quotes = quotes->mNext;
michael@0	12193	}
michael@0	12194	}
michael@0	12195	AppendValue(eCSSProperty_quotes, value);
michael@0	12196	return true;
michael@0	12197	}
michael@0	12198
michael@0	12199	bool
michael@0	12200	CSSParserImpl::ParseSize()
michael@0	12201	{
michael@0	12202	nsCSSValue width, height;
michael@0	12203	if (!ParseVariant(width, VARIANT_AHKL, nsCSSProps::kPageSizeKTable)) {
michael@0	12204	return false;
michael@0	12205	}
michael@0	12206	if (width.IsLengthUnit()) {
michael@0	12207	ParseVariant(height, VARIANT_LENGTH, nullptr);
michael@0	12208	}
michael@0	12209
michael@0	12210	if (width == height || height.GetUnit() == eCSSUnit_Null) {
michael@0	12211	AppendValue(eCSSProperty_size, width);
michael@0	12212	} else {
michael@0	12213	nsCSSValue pair;
michael@0	12214	pair.SetPairValue(width, height);
michael@0	12215	AppendValue(eCSSProperty_size, pair);
michael@0	12216	}
michael@0	12217	return true;
michael@0	12218	}
michael@0	12219
michael@0	12220	bool
michael@0	12221	CSSParserImpl::ParseTextDecoration()
michael@0	12222	{
michael@0	12223	enum {
michael@0	12224	eDecorationNone = NS_STYLE_TEXT_DECORATION_LINE_NONE,
michael@0	12225	eDecorationUnderline = NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE,
michael@0	12226	eDecorationOverline = NS_STYLE_TEXT_DECORATION_LINE_OVERLINE,
michael@0	12227	eDecorationLineThrough = NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH,
michael@0	12228	eDecorationBlink = NS_STYLE_TEXT_DECORATION_LINE_BLINK,
michael@0	12229	eDecorationPrefAnchors = NS_STYLE_TEXT_DECORATION_LINE_PREF_ANCHORS
michael@0	12230	};
michael@0	12231	static_assert((eDecorationNone ^ eDecorationUnderline ^
michael@0	12232	eDecorationOverline ^ eDecorationLineThrough ^
michael@0	12233	eDecorationBlink ^ eDecorationPrefAnchors) ==
michael@0	12234	(eDecorationNone | eDecorationUnderline |
michael@0	12235	eDecorationOverline | eDecorationLineThrough |
michael@0	12236	eDecorationBlink | eDecorationPrefAnchors),
michael@0	12237	"text decoration constants need to be bitmasks");
michael@0	12238
michael@0	12239	static const KTableValue kTextDecorationKTable[] = {
michael@0	12240	eCSSKeyword_none, eDecorationNone,
michael@0	12241	eCSSKeyword_underline, eDecorationUnderline,
michael@0	12242	eCSSKeyword_overline, eDecorationOverline,
michael@0	12243	eCSSKeyword_line_through, eDecorationLineThrough,
michael@0	12244	eCSSKeyword_blink, eDecorationBlink,
michael@0	12245	eCSSKeyword__moz_anchor_decoration, eDecorationPrefAnchors,
michael@0	12246	eCSSKeyword_UNKNOWN,-1
michael@0	12247	};
michael@0	12248
michael@0	12249	nsCSSValue value;
michael@0	12250	if (!ParseVariant(value, VARIANT_HK, kTextDecorationKTable)) {
michael@0	12251	return false;
michael@0	12252	}
michael@0	12253
michael@0	12254	nsCSSValue line, style, color;
michael@0	12255	switch (value.GetUnit()) {
michael@0	12256	case eCSSUnit_Enumerated: {
michael@0	12257	// We shouldn't accept decoration line style and color via
michael@0	12258	// text-decoration.
michael@0	12259	color.SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR,
michael@0	12260	eCSSUnit_Enumerated);
michael@0	12261	style.SetIntValue(NS_STYLE_TEXT_DECORATION_STYLE_SOLID,
michael@0	12262	eCSSUnit_Enumerated);
michael@0	12263
michael@0	12264	int32_t intValue = value.GetIntValue();
michael@0	12265	if (intValue == eDecorationNone) {
michael@0	12266	line.SetIntValue(NS_STYLE_TEXT_DECORATION_LINE_NONE,
michael@0	12267	eCSSUnit_Enumerated);
michael@0	12268	break;
michael@0	12269	}
michael@0	12270
michael@0	12271	// look for more keywords
michael@0	12272	nsCSSValue keyword;
michael@0	12273	int32_t index;
michael@0	12274	for (index = 0; index < 3; index++) {
michael@0	12275	if (!ParseEnum(keyword, kTextDecorationKTable)) {
michael@0	12276	break;
michael@0	12277	}
michael@0	12278	int32_t newValue = keyword.GetIntValue();
michael@0	12279	if (newValue == eDecorationNone || newValue & intValue) {
michael@0	12280	// 'none' keyword in conjuction with others is not allowed, and
michael@0	12281	// duplicate keyword is not allowed.
michael@0	12282	return false;
michael@0	12283	}
michael@0	12284	intValue |= newValue;
michael@0	12285	}
michael@0	12286
michael@0	12287	line.SetIntValue(intValue, eCSSUnit_Enumerated);
michael@0	12288	break;
michael@0	12289	}
michael@0	12290	default:
michael@0	12291	line = color = style = value;
michael@0	12292	break;
michael@0	12293	}
michael@0	12294
michael@0	12295	AppendValue(eCSSProperty_text_decoration_line, line);
michael@0	12296	AppendValue(eCSSProperty_text_decoration_color, color);
michael@0	12297	AppendValue(eCSSProperty_text_decoration_style, style);
michael@0	12298
michael@0	12299	return true;
michael@0	12300	}
michael@0	12301
michael@0	12302	bool
michael@0	12303	CSSParserImpl::ParseTextAlign(nsCSSValue& aValue, const KTableValue aTable[])
michael@0	12304	{
michael@0	12305	if (ParseVariant(aValue, VARIANT_INHERIT, nullptr)) {
michael@0	12306	// 'inherit', 'initial' and 'unset' must be alone
michael@0	12307	return true;
michael@0	12308	}
michael@0	12309
michael@0	12310	nsCSSValue left;
michael@0	12311	if (!ParseVariant(left, VARIANT_KEYWORD, aTable)) {
michael@0	12312	return false;
michael@0	12313	}
michael@0	12314
michael@0	12315	if (!nsLayoutUtils::IsTextAlignTrueValueEnabled()) {
michael@0	12316	aValue = left;
michael@0	12317	return true;
michael@0	12318	}
michael@0	12319
michael@0	12320	nsCSSValue right;
michael@0	12321	if (ParseVariant(right, VARIANT_KEYWORD, aTable)) {
michael@0	12322	// 'true' must be combined with some other value than 'true'.
michael@0	12323	if (left.GetIntValue() == NS_STYLE_TEXT_ALIGN_TRUE &&
michael@0	12324	right.GetIntValue() == NS_STYLE_TEXT_ALIGN_TRUE) {
michael@0	12325	return false;
michael@0	12326	}
michael@0	12327	aValue.SetPairValue(left, right);
michael@0	12328	} else {
michael@0	12329	// Single value 'true' is not allowed.
michael@0	12330	if (left.GetIntValue() == NS_STYLE_TEXT_ALIGN_TRUE) {
michael@0	12331	return false;
michael@0	12332	}
michael@0	12333	aValue = left;
michael@0	12334	}
michael@0	12335	return true;
michael@0	12336	}
michael@0	12337
michael@0	12338	bool
michael@0	12339	CSSParserImpl::ParseTextAlign(nsCSSValue& aValue)
michael@0	12340	{
michael@0	12341	return ParseTextAlign(aValue, nsCSSProps::kTextAlignKTable);
michael@0	12342	}
michael@0	12343
michael@0	12344	bool
michael@0	12345	CSSParserImpl::ParseTextAlignLast(nsCSSValue& aValue)
michael@0	12346	{
michael@0	12347	return ParseTextAlign(aValue, nsCSSProps::kTextAlignLastKTable);
michael@0	12348	}
michael@0	12349
michael@0	12350	bool
michael@0	12351	CSSParserImpl::ParseTextDecorationLine(nsCSSValue& aValue)
michael@0	12352	{
michael@0	12353	if (ParseVariant(aValue, VARIANT_HK, nsCSSProps::kTextDecorationLineKTable)) {
michael@0	12354	if (eCSSUnit_Enumerated == aValue.GetUnit()) {
michael@0	12355	int32_t intValue = aValue.GetIntValue();
michael@0	12356	if (intValue != NS_STYLE_TEXT_DECORATION_LINE_NONE) {
michael@0	12357	// look for more keywords
michael@0	12358	nsCSSValue keyword;
michael@0	12359	int32_t index;
michael@0	12360	for (index = 0; index < 3; index++) {
michael@0	12361	if (ParseEnum(keyword, nsCSSProps::kTextDecorationLineKTable)) {
michael@0	12362	int32_t newValue = keyword.GetIntValue();
michael@0	12363	if (newValue == NS_STYLE_TEXT_DECORATION_LINE_NONE ||
michael@0	12364	newValue & intValue) {
michael@0	12365	// 'none' keyword in conjuction with others is not allowed, and
michael@0	12366	// duplicate keyword is not allowed.
michael@0	12367	return false;
michael@0	12368	}
michael@0	12369	intValue |= newValue;
michael@0	12370	}
michael@0	12371	else {
michael@0	12372	break;
michael@0	12373	}
michael@0	12374	}
michael@0	12375	aValue.SetIntValue(intValue, eCSSUnit_Enumerated);
michael@0	12376	}
michael@0	12377	}
michael@0	12378	return true;
michael@0	12379	}
michael@0	12380	return false;
michael@0	12381	}
michael@0	12382
michael@0	12383	bool
michael@0	12384	CSSParserImpl::ParseTextOverflow(nsCSSValue& aValue)
michael@0	12385	{
michael@0	12386	if (ParseVariant(aValue, VARIANT_INHERIT, nullptr)) {
michael@0	12387	// 'inherit', 'initial' and 'unset' must be alone
michael@0	12388	return true;
michael@0	12389	}
michael@0	12390
michael@0	12391	nsCSSValue left;
michael@0	12392	if (!ParseVariant(left, VARIANT_KEYWORD | VARIANT_STRING,
michael@0	12393	nsCSSProps::kTextOverflowKTable))
michael@0	12394	return false;
michael@0	12395
michael@0	12396	nsCSSValue right;
michael@0	12397	if (ParseVariant(right, VARIANT_KEYWORD | VARIANT_STRING,
michael@0	12398	nsCSSProps::kTextOverflowKTable))
michael@0	12399	aValue.SetPairValue(left, right);
michael@0	12400	else {
michael@0	12401	aValue = left;
michael@0	12402	}
michael@0	12403	return true;
michael@0	12404	}
michael@0	12405
michael@0	12406	bool
michael@0	12407	CSSParserImpl::ParseTouchAction(nsCSSValue& aValue)
michael@0	12408	{
michael@0	12409	// Avaliable values of property touch-action:
michael@0	12410	// auto | none | [pan-x || pan-y] | manipulation
michael@0	12411
michael@0	12412	if (!ParseVariant(aValue, VARIANT_HK, nsCSSProps::kTouchActionKTable)) {
michael@0	12413	return false;
michael@0	12414	}
michael@0	12415
michael@0	12416	// Auto and None keywords aren't allowed in conjunction with others.
michael@0	12417	// Also inherit, initial and unset values are available.
michael@0	12418	if (eCSSUnit_Enumerated != aValue.GetUnit()) {
michael@0	12419	return true;
michael@0	12420	}
michael@0	12421
michael@0	12422	int32_t intValue = aValue.GetIntValue();
michael@0	12423	nsCSSValue nextValue;
michael@0	12424	if (ParseEnum(nextValue, nsCSSProps::kTouchActionKTable)) {
michael@0	12425	int32_t nextIntValue = nextValue.GetIntValue();
michael@0	12426
michael@0	12427	// duplicates aren't allowed.
michael@0	12428	if (nextIntValue & intValue) {
michael@0	12429	return false;
michael@0	12430	}
michael@0	12431
michael@0	12432	// Auto and None and Manipulation is not allowed in conjunction with others.
michael@0	12433	if ((intValue | nextIntValue) & (NS_STYLE_TOUCH_ACTION_NONE |
michael@0	12434	NS_STYLE_TOUCH_ACTION_AUTO |
michael@0	12435	NS_STYLE_TOUCH_ACTION_MANIPULATION)) {
michael@0	12436	return false;
michael@0	12437	}
michael@0	12438
michael@0	12439	aValue.SetIntValue(nextIntValue | intValue, eCSSUnit_Enumerated);
michael@0	12440	}
michael@0	12441
michael@0	12442	return true;
michael@0	12443	}
michael@0	12444
michael@0	12445	bool
michael@0	12446	CSSParserImpl::ParseTextCombineUpright(nsCSSValue& aValue)
michael@0	12447	{
michael@0	12448	if (!ParseVariant(aValue, VARIANT_HK,
michael@0	12449	nsCSSProps::kTextCombineUprightKTable)) {
michael@0	12450	return false;
michael@0	12451	}
michael@0	12452
michael@0	12453	// if 'digits', need to check for an explicit number [2, 3, 4]
michael@0	12454	if (eCSSUnit_Enumerated == aValue.GetUnit() &&
michael@0	12455	aValue.GetIntValue() == NS_STYLE_TEXT_COMBINE_UPRIGHT_DIGITS_2) {
michael@0	12456	if (!GetToken(true)) {
michael@0	12457	return true;
michael@0	12458	}
michael@0	12459	if (mToken.mType == eCSSToken_Number && mToken.mIntegerValid) {
michael@0	12460	switch (mToken.mInteger) {
michael@0	12461	case 2: // already set, nothing to do
michael@0	12462	break;
michael@0	12463	case 3:
michael@0	12464	aValue.SetIntValue(NS_STYLE_TEXT_COMBINE_UPRIGHT_DIGITS_3,
michael@0	12465	eCSSUnit_Enumerated);
michael@0	12466	break;
michael@0	12467	case 4:
michael@0	12468	aValue.SetIntValue(NS_STYLE_TEXT_COMBINE_UPRIGHT_DIGITS_4,
michael@0	12469	eCSSUnit_Enumerated);
michael@0	12470	break;
michael@0	12471	default:
michael@0	12472	// invalid digits value
michael@0	12473	return false;
michael@0	12474	}
michael@0	12475	} else {
michael@0	12476	UngetToken();
michael@0	12477	}
michael@0	12478	}
michael@0	12479	return true;
michael@0	12480	}
michael@0	12481
michael@0	12482	///////////////////////////////////////////////////////
michael@0	12483	// transform Parsing Implementation
michael@0	12484
michael@0	12485	/* Reads a function list of arguments and consumes the closing parenthesis.
michael@0	12486	* Do not call this function directly; it's meant to be called from
michael@0	12487	* ParseFunction.
michael@0	12488	*/
michael@0	12489	bool
michael@0	12490	CSSParserImpl::ParseFunctionInternals(const int32_t aVariantMask[],
michael@0	12491	int32_t aVariantMaskAll,
michael@0	12492	uint16_t aMinElems,
michael@0	12493	uint16_t aMaxElems,
michael@0	12494	InfallibleTArray<nsCSSValue> &aOutput)
michael@0	12495	{
michael@0	12496	NS_ASSERTION((aVariantMask && !aVariantMaskAll) ||
michael@0	12497	(!aVariantMask && aVariantMaskAll),
michael@0	12498	"only one of the two variant mask parameters can be set");
michael@0	12499
michael@0	12500	for (uint16_t index = 0; index < aMaxElems; ++index) {
michael@0	12501	nsCSSValue newValue;
michael@0	12502	int32_t m = aVariantMaskAll ? aVariantMaskAll : aVariantMask[index];
michael@0	12503	if (!ParseVariant(newValue, m, nullptr)) {
michael@0	12504	break;
michael@0	12505	}
michael@0	12506
michael@0	12507	aOutput.AppendElement(newValue);
michael@0	12508
michael@0	12509	if (ExpectSymbol(',', true)) {
michael@0	12510	// Move on to the next argument if we see a comma.
michael@0	12511	continue;
michael@0	12512	}
michael@0	12513
michael@0	12514	if (ExpectSymbol(')', true)) {
michael@0	12515	// Make sure we've read enough symbols if we see a closing parenthesis.
michael@0	12516	return (index + 1) >= aMinElems;
michael@0	12517	}
michael@0	12518
michael@0	12519	// Only a comma or a closing parenthesis is valid after an argument.
michael@0	12520	break;
michael@0	12521	}
michael@0	12522
michael@0	12523	// If we're here, we've hit an error without seeing a closing parenthesis or
michael@0	12524	// we've read too many elements without seeing a closing parenthesis.
michael@0	12525	SkipUntil(')');
michael@0	12526	return false;
michael@0	12527	}
michael@0	12528
michael@0	12529	/* Parses a function [ input of the form (a [, b]*) ] and stores it
michael@0	12530	* as an nsCSSValue that holds a function of the form
michael@0	12531	* function-name arg1 arg2 ... argN
michael@0	12532	*
michael@0	12533	* On error, the return value is false.
michael@0	12534	*
michael@0	12535	* @param aFunction The name of the function that we're reading.
michael@0	12536	* @param aAllowedTypes An array of values corresponding to the legal
michael@0	12537	* types for each element in the function. The zeroth element in the
michael@0	12538	* array corresponds to the first function parameter, etc. The length
michael@0	12539	* of this array _must_ be greater than or equal to aMaxElems or the
michael@0	12540	* behavior is undefined. If not null, aAllowTypesAll must be 0.
michael@0	12541	* @param aAllowedTypesAll If set, every element tested for these types
michael@0	12542	* @param aMinElems Minimum number of elements to read. Reading fewer than
michael@0	12543	* this many elements will result in the function failing.
michael@0	12544	* @param aMaxElems Maximum number of elements to read. Reading more than
michael@0	12545	* this many elements will result in the function failing.
michael@0	12546	* @param aValue (out) The value that was parsed.
michael@0	12547	*/
michael@0	12548	bool
michael@0	12549	CSSParserImpl::ParseFunction(nsCSSKeyword aFunction,
michael@0	12550	const int32_t aAllowedTypes[],
michael@0	12551	int32_t aAllowedTypesAll,
michael@0	12552	uint16_t aMinElems, uint16_t aMaxElems,
michael@0	12553	nsCSSValue &aValue)
michael@0	12554	{
michael@0	12555	NS_ASSERTION((aAllowedTypes && !aAllowedTypesAll) ||
michael@0	12556	(!aAllowedTypes && aAllowedTypesAll),
michael@0	12557	"only one of the two allowed type parameter can be set");
michael@0	12558	typedef InfallibleTArray<nsCSSValue>::size_type arrlen_t;
michael@0	12559
michael@0	12560	/* 2^16 - 2, so that if we have 2^16 - 2 transforms, we have 2^16 - 1
michael@0	12561	* elements stored in the the nsCSSValue::Array.
michael@0	12562	*/
michael@0	12563	static const arrlen_t MAX_ALLOWED_ELEMS = 0xFFFE;
michael@0	12564
michael@0	12565	/* Read in a list of values as an array, failing if we can't or if
michael@0	12566	* it's out of bounds.
michael@0	12567	*
michael@0	12568	* We reserve 16 entries in the foundValues array in order to avoid
michael@0	12569	* having to resize the array dynamically when parsing some well-formed
michael@0	12570	* functions. The number 16 is coming from the number of arguments that
michael@0	12571	* matrix3d() accepts.
michael@0	12572	*/
michael@0	12573	AutoInfallibleTArray<nsCSSValue, 16> foundValues;
michael@0	12574	if (!ParseFunctionInternals(aAllowedTypes, aAllowedTypesAll, aMinElems,
michael@0	12575	aMaxElems, foundValues)) {
michael@0	12576	return false;
michael@0	12577	}
michael@0	12578
michael@0	12579	/*
michael@0	12580	* In case the user has given us more than 2^16 - 2 arguments,
michael@0	12581	* we'll truncate them at 2^16 - 2 arguments.
michael@0	12582	*/
michael@0	12583	uint16_t numArgs = std::min(foundValues.Length(), MAX_ALLOWED_ELEMS);
michael@0	12584	nsRefPtr<nsCSSValue::Array> convertedArray =
michael@0	12585	aValue.InitFunction(aFunction, numArgs);
michael@0	12586
michael@0	12587	/* Copy things over. */
michael@0	12588	for (uint16_t index = 0; index < numArgs; ++index)
michael@0	12589	convertedArray->Item(index + 1) = foundValues[static_cast<arrlen_t>(index)];
michael@0	12590
michael@0	12591	/* Return it! */
michael@0	12592	return true;
michael@0	12593	}
michael@0	12594
michael@0	12595	/**
michael@0	12596	* Given a token, determines the minimum and maximum number of function
michael@0	12597	* parameters to read, along with the mask that should be used to read
michael@0	12598	* those function parameters. If the token isn't a transform function,
michael@0	12599	* returns an error.
michael@0	12600	*
michael@0	12601	* @param aToken The token identifying the function.
michael@0	12602	* @param aMinElems [out] The minimum number of elements to read.
michael@0	12603	* @param aMaxElems [out] The maximum number of elements to read
michael@0	12604	* @param aVariantMask [out] The variant mask to use during parsing
michael@0	12605	* @return Whether the information was loaded successfully.
michael@0	12606	*/
michael@0	12607	static bool GetFunctionParseInformation(nsCSSKeyword aToken,
michael@0	12608	bool aIsPrefixed,
michael@0	12609	uint16_t &aMinElems,
michael@0	12610	uint16_t &aMaxElems,
michael@0	12611	const int32_t *& aVariantMask)
michael@0	12612	{
michael@0	12613	/* These types represent the common variant masks that will be used to
michael@0	12614	* parse out the individual functions. The order in the enumeration
michael@0	12615	* must match the order in which the masks are declared.
michael@0	12616	*/
michael@0	12617	enum { eLengthPercentCalc,
michael@0	12618	eLengthCalc,
michael@0	12619	eTwoLengthPercentCalcs,
michael@0	12620	eTwoLengthPercentCalcsOneLengthCalc,
michael@0	12621	eAngle,
michael@0	12622	eTwoAngles,
michael@0	12623	eNumber,
michael@0	12624	ePositiveLength,
michael@0	12625	eTwoNumbers,
michael@0	12626	eThreeNumbers,
michael@0	12627	eThreeNumbersOneAngle,
michael@0	12628	eMatrix,
michael@0	12629	eMatrixPrefixed,
michael@0	12630	eMatrix3d,
michael@0	12631	eMatrix3dPrefixed,
michael@0	12632	eNumVariantMasks };
michael@0	12633	static const int32_t kMaxElemsPerFunction = 16;
michael@0	12634	static const int32_t kVariantMasks[eNumVariantMasks][kMaxElemsPerFunction] = {
michael@0	12635	{VARIANT_LPCALC},
michael@0	12636	{VARIANT_LENGTH|VARIANT_CALC},
michael@0	12637	{VARIANT_LPCALC, VARIANT_LPCALC},
michael@0	12638	{VARIANT_LPCALC, VARIANT_LPCALC, VARIANT_LENGTH|VARIANT_CALC},
michael@0	12639	{VARIANT_ANGLE_OR_ZERO},
michael@0	12640	{VARIANT_ANGLE_OR_ZERO, VARIANT_ANGLE_OR_ZERO},
michael@0	12641	{VARIANT_NUMBER},
michael@0	12642	{VARIANT_LENGTH|VARIANT_POSITIVE_DIMENSION},
michael@0	12643	{VARIANT_NUMBER, VARIANT_NUMBER},
michael@0	12644	{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER},
michael@0	12645	{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_ANGLE_OR_ZERO},
michael@0	12646	{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12647	VARIANT_NUMBER, VARIANT_NUMBER},
michael@0	12648	{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12649	VARIANT_LPNCALC, VARIANT_LPNCALC},
michael@0	12650	{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12651	VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12652	VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12653	VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER},
michael@0	12654	{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12655	VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12656	VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
michael@0	12657	VARIANT_LPNCALC, VARIANT_LPNCALC, VARIANT_LNCALC, VARIANT_NUMBER}};
michael@0	12658
michael@0	12659	#ifdef DEBUG
michael@0	12660	static const uint8_t kVariantMaskLengths[eNumVariantMasks] =
michael@0	12661	{1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 6, 6, 16, 16};
michael@0	12662	#endif
michael@0	12663
michael@0	12664	int32_t variantIndex = eNumVariantMasks;
michael@0	12665
michael@0	12666	switch (aToken) {
michael@0	12667	case eCSSKeyword_translatex:
michael@0	12668	case eCSSKeyword_translatey:
michael@0	12669	/* Exactly one length or percent. */
michael@0	12670	variantIndex = eLengthPercentCalc;
michael@0	12671	aMinElems = 1U;
michael@0	12672	aMaxElems = 1U;
michael@0	12673	break;
michael@0	12674	case eCSSKeyword_translatez:
michael@0	12675	/* Exactly one length */
michael@0	12676	variantIndex = eLengthCalc;
michael@0	12677	aMinElems = 1U;
michael@0	12678	aMaxElems = 1U;
michael@0	12679	break;
michael@0	12680	case eCSSKeyword_translate3d:
michael@0	12681	/* Exactly two lengthds or percents and a number */
michael@0	12682	variantIndex = eTwoLengthPercentCalcsOneLengthCalc;
michael@0	12683	aMinElems = 3U;
michael@0	12684	aMaxElems = 3U;
michael@0	12685	break;
michael@0	12686	case eCSSKeyword_scalez:
michael@0	12687	case eCSSKeyword_scalex:
michael@0	12688	case eCSSKeyword_scaley:
michael@0	12689	/* Exactly one scale factor. */
michael@0	12690	variantIndex = eNumber;
michael@0	12691	aMinElems = 1U;
michael@0	12692	aMaxElems = 1U;
michael@0	12693	break;
michael@0	12694	case eCSSKeyword_scale3d:
michael@0	12695	/* Exactly three scale factors. */
michael@0	12696	variantIndex = eThreeNumbers;
michael@0	12697	aMinElems = 3U;
michael@0	12698	aMaxElems = 3U;
michael@0	12699	break;
michael@0	12700	case eCSSKeyword_rotatex:
michael@0	12701	case eCSSKeyword_rotatey:
michael@0	12702	case eCSSKeyword_rotate:
michael@0	12703	case eCSSKeyword_rotatez:
michael@0	12704	/* Exactly one angle. */
michael@0	12705	variantIndex = eAngle;
michael@0	12706	aMinElems = 1U;
michael@0	12707	aMaxElems = 1U;
michael@0	12708	break;
michael@0	12709	case eCSSKeyword_rotate3d:
michael@0	12710	variantIndex = eThreeNumbersOneAngle;
michael@0	12711	aMinElems = 4U;
michael@0	12712	aMaxElems = 4U;
michael@0	12713	break;
michael@0	12714	case eCSSKeyword_translate:
michael@0	12715	/* One or two lengths or percents. */
michael@0	12716	variantIndex = eTwoLengthPercentCalcs;
michael@0	12717	aMinElems = 1U;
michael@0	12718	aMaxElems = 2U;
michael@0	12719	break;
michael@0	12720	case eCSSKeyword_skew:
michael@0	12721	/* Exactly one or two angles. */
michael@0	12722	variantIndex = eTwoAngles;
michael@0	12723	aMinElems = 1U;
michael@0	12724	aMaxElems = 2U;
michael@0	12725	break;
michael@0	12726	case eCSSKeyword_scale:
michael@0	12727	/* One or two scale factors. */
michael@0	12728	variantIndex = eTwoNumbers;
michael@0	12729	aMinElems = 1U;
michael@0	12730	aMaxElems = 2U;
michael@0	12731	break;
michael@0	12732	case eCSSKeyword_skewx:
michael@0	12733	/* Exactly one angle. */
michael@0	12734	variantIndex = eAngle;
michael@0	12735	aMinElems = 1U;
michael@0	12736	aMaxElems = 1U;
michael@0	12737	break;
michael@0	12738	case eCSSKeyword_skewy:
michael@0	12739	/* Exactly one angle. */
michael@0	12740	variantIndex = eAngle;
michael@0	12741	aMinElems = 1U;
michael@0	12742	aMaxElems = 1U;
michael@0	12743	break;
michael@0	12744	case eCSSKeyword_matrix:
michael@0	12745	/* Six values, all numbers. */
michael@0	12746	variantIndex = aIsPrefixed ? eMatrixPrefixed : eMatrix;
michael@0	12747	aMinElems = 6U;
michael@0	12748	aMaxElems = 6U;
michael@0	12749	break;
michael@0	12750	case eCSSKeyword_matrix3d:
michael@0	12751	/* 16 matrix values, all numbers */
michael@0	12752	variantIndex = aIsPrefixed ? eMatrix3dPrefixed : eMatrix3d;
michael@0	12753	aMinElems = 16U;
michael@0	12754	aMaxElems = 16U;
michael@0	12755	break;
michael@0	12756	case eCSSKeyword_perspective:
michael@0	12757	/* Exactly one scale number. */
michael@0	12758	variantIndex = ePositiveLength;
michael@0	12759	aMinElems = 1U;
michael@0	12760	aMaxElems = 1U;
michael@0	12761	break;
michael@0	12762	default:
michael@0	12763	/* Oh dear, we didn't match. Report an error. */
michael@0	12764	return false;
michael@0	12765	}
michael@0	12766
michael@0	12767	NS_ASSERTION(aMinElems > 0, "Didn't update minimum elements!");
michael@0	12768	NS_ASSERTION(aMaxElems > 0, "Didn't update maximum elements!");
michael@0	12769	NS_ASSERTION(aMinElems <= aMaxElems, "aMinElems > aMaxElems!");
michael@0	12770	NS_ASSERTION(variantIndex >= 0, "Invalid variant mask!");
michael@0	12771	NS_ASSERTION(variantIndex < eNumVariantMasks, "Invalid variant mask!");
michael@0	12772	#ifdef DEBUG
michael@0	12773	NS_ASSERTION(aMaxElems <= kVariantMaskLengths[variantIndex],
michael@0	12774	"Invalid aMaxElems for this variant mask.");
michael@0	12775	#endif
michael@0	12776
michael@0	12777	// Convert the index into a mask.
michael@0	12778	aVariantMask = kVariantMasks[variantIndex];
michael@0	12779
michael@0	12780	return true;
michael@0	12781	}
michael@0	12782
michael@0	12783	bool CSSParserImpl::ParseWillChange()
michael@0	12784	{
michael@0	12785	nsCSSValue listValue;
michael@0	12786	nsCSSValueList* currentListValue = listValue.SetListValue();
michael@0	12787	bool first = true;
michael@0	12788	for (;;) {
michael@0	12789	const uint32_t variantMask = VARIANT_IDENTIFIER |
michael@0	12790	VARIANT_INHERIT |
michael@0	12791	VARIANT_NONE |
michael@0	12792	VARIANT_ALL |
michael@0	12793	VARIANT_AUTO;
michael@0	12794	nsCSSValue value;
michael@0	12795	if (!ParseVariant(value, variantMask, nullptr)) {
michael@0	12796	return false;
michael@0	12797	}
michael@0	12798
michael@0	12799	if (value.GetUnit() == eCSSUnit_None ||
michael@0	12800	value.GetUnit() == eCSSUnit_All)
michael@0	12801	{
michael@0	12802	return false;
michael@0	12803	}
michael@0	12804
michael@0	12805	if (value.GetUnit() != eCSSUnit_Ident) {
michael@0	12806	if (first) {
michael@0	12807	AppendValue(eCSSProperty_will_change, value);
michael@0	12808	return true;
michael@0	12809	} else {
michael@0	12810	return false;
michael@0	12811	}
michael@0	12812	}
michael@0	12813
michael@0	12814	nsString str;
michael@0	12815	value.GetStringValue(str);
michael@0	12816	if (str.LowerCaseEqualsLiteral("default")) {
michael@0	12817	return false;
michael@0	12818	}
michael@0	12819
michael@0	12820	currentListValue->mValue = value;
michael@0	12821
michael@0	12822	if (!ExpectSymbol(',', true)) {
michael@0	12823	break;
michael@0	12824	}
michael@0	12825	currentListValue->mNext = new nsCSSValueList;
michael@0	12826	currentListValue = currentListValue->mNext;
michael@0	12827	first = false;
michael@0	12828	}
michael@0	12829
michael@0	12830	AppendValue(eCSSProperty_will_change, listValue);
michael@0	12831	return true;
michael@0	12832	}
michael@0	12833
michael@0	12834	/* Reads a single transform function from the tokenizer stream, reporting an
michael@0	12835	* error if something goes wrong.
michael@0	12836	*/
michael@0	12837	bool
michael@0	12838	CSSParserImpl::ParseSingleTransform(bool aIsPrefixed, nsCSSValue& aValue)
michael@0	12839	{
michael@0	12840	if (!GetToken(true))
michael@0	12841	return false;
michael@0	12842
michael@0	12843	if (mToken.mType != eCSSToken_Function) {
michael@0	12844	UngetToken();
michael@0	12845	return false;
michael@0	12846	}
michael@0	12847
michael@0	12848	const int32_t* variantMask;
michael@0	12849	uint16_t minElems, maxElems;
michael@0	12850	nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
michael@0	12851
michael@0	12852	if (!GetFunctionParseInformation(keyword, aIsPrefixed,
michael@0	12853	minElems, maxElems, variantMask))
michael@0	12854	return false;
michael@0	12855
michael@0	12856	return ParseFunction(keyword, variantMask, 0, minElems, maxElems, aValue);
michael@0	12857	}
michael@0	12858
michael@0	12859	/* Parses a transform property list by continuously reading in properties
michael@0	12860	* and constructing a matrix from it.
michael@0	12861	*/
michael@0	12862	bool CSSParserImpl::ParseTransform(bool aIsPrefixed)
michael@0	12863	{
michael@0	12864	nsCSSValue value;
michael@0	12865	// 'inherit', 'initial', 'unset' and 'none' must be alone
michael@0	12866	if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	12867	nsCSSValueSharedList* list = new nsCSSValueSharedList;
michael@0	12868	value.SetSharedListValue(list);
michael@0	12869	list->mHead = new nsCSSValueList;
michael@0	12870	nsCSSValueList* cur = list->mHead;
michael@0	12871	for (;;) {
michael@0	12872	if (!ParseSingleTransform(aIsPrefixed, cur->mValue)) {
michael@0	12873	return false;
michael@0	12874	}
michael@0	12875	if (CheckEndProperty()) {
michael@0	12876	break;
michael@0	12877	}
michael@0	12878	cur->mNext = new nsCSSValueList;
michael@0	12879	cur = cur->mNext;
michael@0	12880	}
michael@0	12881	}
michael@0	12882	AppendValue(eCSSProperty_transform, value);
michael@0	12883	return true;
michael@0	12884	}
michael@0	12885
michael@0	12886	bool CSSParserImpl::ParseTransformOrigin(bool aPerspective)
michael@0	12887	{
michael@0	12888	nsCSSValuePair position;
michael@0	12889	if (!ParseBoxPositionValues(position, true))
michael@0	12890	return false;
michael@0	12891
michael@0	12892	nsCSSProperty prop = eCSSProperty_transform_origin;
michael@0	12893	if (aPerspective) {
michael@0	12894	prop = eCSSProperty_perspective_origin;
michael@0	12895	}
michael@0	12896
michael@0	12897	// Unlike many other uses of pairs, this position should always be stored
michael@0	12898	// as a pair, even if the values are the same, so it always serializes as
michael@0	12899	// a pair, and to keep the computation code simple.
michael@0	12900	if (position.mXValue.GetUnit() == eCSSUnit_Inherit ||
michael@0	12901	position.mXValue.GetUnit() == eCSSUnit_Initial ||
michael@0	12902	position.mXValue.GetUnit() == eCSSUnit_Unset) {
michael@0	12903	NS_ABORT_IF_FALSE(position.mXValue == position.mYValue,
michael@0	12904	"inherit/initial/unset only half?");
michael@0	12905	AppendValue(prop, position.mXValue);
michael@0	12906	} else {
michael@0	12907	nsCSSValue value;
michael@0	12908	if (aPerspective) {
michael@0	12909	value.SetPairValue(position.mXValue, position.mYValue);
michael@0	12910	} else {
michael@0	12911	nsCSSValue depth;
michael@0	12912	if (!ParseVariant(depth, VARIANT_LENGTH | VARIANT_CALC, nullptr)) {
michael@0	12913	depth.SetFloatValue(0.0f, eCSSUnit_Pixel);
michael@0	12914	}
michael@0	12915	value.SetTripletValue(position.mXValue, position.mYValue, depth);
michael@0	12916	}
michael@0	12917
michael@0	12918	AppendValue(prop, value);
michael@0	12919	}
michael@0	12920	return true;
michael@0	12921	}
michael@0	12922
michael@0	12923	/**
michael@0	12924	* Reads a drop-shadow value. At the moment the Filter Effects specification
michael@0	12925	* just expects one shadow item. Should this ever change to a list of shadow
michael@0	12926	* items, use ParseShadowList instead.
michael@0	12927	*/
michael@0	12928	bool
michael@0	12929	CSSParserImpl::ParseDropShadow(nsCSSValue* aValue)
michael@0	12930	{
michael@0	12931	// Use nsCSSValueList to reuse the shadow resolving code in
michael@0	12932	// nsRuleNode and nsComputedDOMStyle.
michael@0	12933	nsCSSValue shadow;
michael@0	12934	nsCSSValueList* cur = shadow.SetListValue();
michael@0	12935	if (!ParseShadowItem(cur->mValue, false))
michael@0	12936	return false;
michael@0	12937
michael@0	12938	if (!ExpectSymbol(')', true))
michael@0	12939	return false;
michael@0	12940
michael@0	12941	nsCSSValue::Array* dropShadow = aValue->InitFunction(eCSSKeyword_drop_shadow, 1);
michael@0	12942
michael@0	12943	// Copy things over.
michael@0	12944	dropShadow->Item(1) = shadow;
michael@0	12945
michael@0	12946	return true;
michael@0	12947	}
michael@0	12948
michael@0	12949	/**
michael@0	12950	* Reads a single url or filter function from the tokenizer stream, reporting an
michael@0	12951	* error if something goes wrong.
michael@0	12952	*/
michael@0	12953	bool
michael@0	12954	CSSParserImpl::ParseSingleFilter(nsCSSValue* aValue)
michael@0	12955	{
michael@0	12956	if (ParseVariant(*aValue, VARIANT_URL, nullptr)) {
michael@0	12957	return true;
michael@0	12958	}
michael@0	12959
michael@0	12960	if (!nsLayoutUtils::CSSFiltersEnabled()) {
michael@0	12961	// With CSS Filters disabled, we should only accept an SVG reference filter.
michael@0	12962	REPORT_UNEXPECTED_TOKEN(PEExpectedNoneOrURL);
michael@0	12963	return false;
michael@0	12964	}
michael@0	12965
michael@0	12966	if (!GetToken(true)) {
michael@0	12967	REPORT_UNEXPECTED_EOF(PEFilterEOF);
michael@0	12968	return false;
michael@0	12969	}
michael@0	12970
michael@0	12971	if (mToken.mType != eCSSToken_Function) {
michael@0	12972	REPORT_UNEXPECTED_TOKEN(PEExpectedNoneOrURLOrFilterFunction);
michael@0	12973	return false;
michael@0	12974	}
michael@0	12975
michael@0	12976	nsCSSKeyword functionName = nsCSSKeywords::LookupKeyword(mToken.mIdent);
michael@0	12977	// Parse drop-shadow independently of the other filter functions
michael@0	12978	// because of its more complex characteristics.
michael@0	12979	if (functionName == eCSSKeyword_drop_shadow) {
michael@0	12980	if (ParseDropShadow(aValue)) {
michael@0	12981	return true;
michael@0	12982	} else {
michael@0	12983	// Unrecognized filter function.
michael@0	12984	REPORT_UNEXPECTED_TOKEN(PEExpectedNoneOrURLOrFilterFunction);
michael@0	12985	SkipUntil(')');
michael@0	12986	return false;
michael@0	12987	}
michael@0	12988	}
michael@0	12989
michael@0	12990	// Set up the parsing rules based on the filter function.
michael@0	12991	int32_t variantMask = VARIANT_PN;
michael@0	12992	bool rejectNegativeArgument = true;
michael@0	12993	bool clampArgumentToOne = false;
michael@0	12994	switch (functionName) {
michael@0	12995	case eCSSKeyword_blur:
michael@0	12996	variantMask = VARIANT_LCALC | VARIANT_NONNEGATIVE_DIMENSION;
michael@0	12997	// VARIANT_NONNEGATIVE_DIMENSION will already reject negative lengths.
michael@0	12998	rejectNegativeArgument = false;
michael@0	12999	break;
michael@0	13000	case eCSSKeyword_brightness:
michael@0	13001	case eCSSKeyword_contrast:
michael@0	13002	case eCSSKeyword_saturate:
michael@0	13003	break;
michael@0	13004	case eCSSKeyword_grayscale:
michael@0	13005	case eCSSKeyword_invert:
michael@0	13006	case eCSSKeyword_sepia:
michael@0	13007	case eCSSKeyword_opacity:
michael@0	13008	clampArgumentToOne = true;
michael@0	13009	break;
michael@0	13010	case eCSSKeyword_hue_rotate:
michael@0	13011	variantMask = VARIANT_ANGLE;
michael@0	13012	rejectNegativeArgument = false;
michael@0	13013	break;
michael@0	13014	default:
michael@0	13015	// Unrecognized filter function.
michael@0	13016	REPORT_UNEXPECTED_TOKEN(PEExpectedNoneOrURLOrFilterFunction);
michael@0	13017	SkipUntil(')');
michael@0	13018	return false;
michael@0	13019	}
michael@0	13020
michael@0	13021	// Parse the function.
michael@0	13022	uint16_t minElems = 1U;
michael@0	13023	uint16_t maxElems = 1U;
michael@0	13024	uint32_t allVariants = 0;
michael@0	13025	if (!ParseFunction(functionName, &variantMask, allVariants,
michael@0	13026	minElems, maxElems, *aValue)) {
michael@0	13027	REPORT_UNEXPECTED(PEFilterFunctionArgumentsParsingError);
michael@0	13028	return false;
michael@0	13029	}
michael@0	13030
michael@0	13031	// Get the first and only argument to the filter function.
michael@0	13032	NS_ABORT_IF_FALSE(aValue->GetUnit() == eCSSUnit_Function,
michael@0	13033	"expected a filter function");
michael@0	13034	NS_ABORT_IF_FALSE(aValue->UnitHasArrayValue(),
michael@0	13035	"filter function should be an array");
michael@0	13036	NS_ABORT_IF_FALSE(aValue->GetArrayValue()->Count() == 2,
michael@0	13037	"filter function should have exactly one argument");
michael@0	13038	nsCSSValue& arg = aValue->GetArrayValue()->Item(1);
michael@0	13039
michael@0	13040	if (rejectNegativeArgument &&
michael@0	13041	((arg.GetUnit() == eCSSUnit_Percent && arg.GetPercentValue() < 0.0f) ||
michael@0	13042	(arg.GetUnit() == eCSSUnit_Number && arg.GetFloatValue() < 0.0f))) {
michael@0	13043	REPORT_UNEXPECTED(PEExpectedNonnegativeNP);
michael@0	13044	return false;
michael@0	13045	}
michael@0	13046
michael@0	13047	if (clampArgumentToOne) {
michael@0	13048	if (arg.GetUnit() == eCSSUnit_Number &&
michael@0	13049	arg.GetFloatValue() > 1.0f) {
michael@0	13050	arg.SetFloatValue(1.0f, arg.GetUnit());
michael@0	13051	} else if (arg.GetUnit() == eCSSUnit_Percent &&
michael@0	13052	arg.GetPercentValue() > 1.0f) {
michael@0	13053	arg.SetPercentValue(1.0f);
michael@0	13054	}
michael@0	13055	}
michael@0	13056
michael@0	13057	return true;
michael@0	13058	}
michael@0	13059
michael@0	13060	/**
michael@0	13061	* Parses a filter property value by continuously reading in urls and/or filter
michael@0	13062	* functions and constructing a list.
michael@0	13063	*
michael@0	13064	* When CSS Filters are enabled, the filter property accepts one or more SVG
michael@0	13065	* reference filters and/or CSS filter functions.
michael@0	13066	* e.g. filter: url(#my-filter-1) blur(3px) url(#my-filter-2) grayscale(50%);
michael@0	13067	*
michael@0	13068	* When CSS Filters are disabled, the filter property only accepts one SVG
michael@0	13069	* reference filter.
michael@0	13070	* e.g. filter: url(#my-filter);
michael@0	13071	*/
michael@0	13072	bool
michael@0	13073	CSSParserImpl::ParseFilter()
michael@0	13074	{
michael@0	13075	nsCSSValue value;
michael@0	13076	// 'inherit', 'initial', 'unset' and 'none' must be alone
michael@0	13077	if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	13078	nsCSSValueList* cur = value.SetListValue();
michael@0	13079	while (cur) {
michael@0	13080	if (!ParseSingleFilter(&cur->mValue)) {
michael@0	13081	return false;
michael@0	13082	}
michael@0	13083	if (CheckEndProperty()) {
michael@0	13084	break;
michael@0	13085	}
michael@0	13086	if (!nsLayoutUtils::CSSFiltersEnabled()) {
michael@0	13087	// With CSS Filters disabled, we should only accept one SVG reference
michael@0	13088	// filter.
michael@0	13089	REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
michael@0	13090	return false;
michael@0	13091	}
michael@0	13092	cur->mNext = new nsCSSValueList;
michael@0	13093	cur = cur->mNext;
michael@0	13094	}
michael@0	13095	}
michael@0	13096	AppendValue(eCSSProperty_filter, value);
michael@0	13097	return true;
michael@0	13098	}
michael@0	13099
michael@0	13100	bool
michael@0	13101	CSSParserImpl::ParseTransitionProperty()
michael@0	13102	{
michael@0	13103	nsCSSValue value;
michael@0	13104	// 'inherit', 'initial', 'unset' and 'none' must be alone
michael@0	13105	if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	13106	// Accept a list of arbitrary identifiers. They should be
michael@0	13107	// CSS properties, but we want to accept any so that we
michael@0	13108	// accept properties that we don't know about yet, e.g.
michael@0	13109	// transition-property: invalid-property, left, opacity;
michael@0	13110	nsCSSValueList* cur = value.SetListValue();
michael@0	13111	for (;;) {
michael@0	13112	if (!ParseVariant(cur->mValue, VARIANT_IDENTIFIER | VARIANT_ALL, nullptr)) {
michael@0	13113	return false;
michael@0	13114	}
michael@0	13115	if (cur->mValue.GetUnit() == eCSSUnit_Ident) {
michael@0	13116	nsDependentString str(cur->mValue.GetStringBufferValue());
michael@0	13117	// Exclude 'none', 'inherit', 'initial' and 'unset' according to the
michael@0	13118	// same rules as for 'counter-reset' in CSS 2.1.
michael@0	13119	if (str.LowerCaseEqualsLiteral("none") ||
michael@0	13120	str.LowerCaseEqualsLiteral("inherit") ||
michael@0	13121	str.LowerCaseEqualsLiteral("initial") ||
michael@0	13122	(str.LowerCaseEqualsLiteral("unset") &&
michael@0	13123	nsLayoutUtils::UnsetValueEnabled())) {
michael@0	13124	return false;
michael@0	13125	}
michael@0	13126	}
michael@0	13127	if (!ExpectSymbol(',', true)) {
michael@0	13128	break;
michael@0	13129	}
michael@0	13130	cur->mNext = new nsCSSValueList;
michael@0	13131	cur = cur->mNext;
michael@0	13132	}
michael@0	13133	}
michael@0	13134	AppendValue(eCSSProperty_transition_property, value);
michael@0	13135	return true;
michael@0	13136	}
michael@0	13137
michael@0	13138	bool
michael@0	13139	CSSParserImpl::ParseTransitionTimingFunctionValues(nsCSSValue& aValue)
michael@0	13140	{
michael@0	13141	NS_ASSERTION(!mHavePushBack &&
michael@0	13142	mToken.mType == eCSSToken_Function &&
michael@0	13143	mToken.mIdent.LowerCaseEqualsLiteral("cubic-bezier"),
michael@0	13144	"unexpected initial state");
michael@0	13145
michael@0	13146	nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(4);
michael@0	13147
michael@0	13148	float x1, x2, y1, y2;
michael@0	13149	if (!ParseTransitionTimingFunctionValueComponent(x1, ',', true) ||
michael@0	13150	!ParseTransitionTimingFunctionValueComponent(y1, ',', false) ||
michael@0	13151	!ParseTransitionTimingFunctionValueComponent(x2, ',', true) ||
michael@0	13152	!ParseTransitionTimingFunctionValueComponent(y2, ')', false)) {
michael@0	13153	return false;
michael@0	13154	}
michael@0	13155
michael@0	13156	val->Item(0).SetFloatValue(x1, eCSSUnit_Number);
michael@0	13157	val->Item(1).SetFloatValue(y1, eCSSUnit_Number);
michael@0	13158	val->Item(2).SetFloatValue(x2, eCSSUnit_Number);
michael@0	13159	val->Item(3).SetFloatValue(y2, eCSSUnit_Number);
michael@0	13160
michael@0	13161	aValue.SetArrayValue(val, eCSSUnit_Cubic_Bezier);
michael@0	13162
michael@0	13163	return true;
michael@0	13164	}
michael@0	13165
michael@0	13166	bool
michael@0	13167	CSSParserImpl::ParseTransitionTimingFunctionValueComponent(float& aComponent,
michael@0	13168	char aStop,
michael@0	13169	bool aCheckRange)
michael@0	13170	{
michael@0	13171	if (!GetToken(true)) {
michael@0	13172	return false;
michael@0	13173	}
michael@0	13174	nsCSSToken* tk = &mToken;
michael@0	13175	if (tk->mType == eCSSToken_Number) {
michael@0	13176	float num = tk->mNumber;
michael@0	13177	if (aCheckRange && (num < 0.0 || num > 1.0)) {
michael@0	13178	return false;
michael@0	13179	}
michael@0	13180	aComponent = num;
michael@0	13181	if (ExpectSymbol(aStop, true)) {
michael@0	13182	return true;
michael@0	13183	}
michael@0	13184	}
michael@0	13185	return false;
michael@0	13186	}
michael@0	13187
michael@0	13188	bool
michael@0	13189	CSSParserImpl::ParseTransitionStepTimingFunctionValues(nsCSSValue& aValue)
michael@0	13190	{
michael@0	13191	NS_ASSERTION(!mHavePushBack &&
michael@0	13192	mToken.mType == eCSSToken_Function &&
michael@0	13193	mToken.mIdent.LowerCaseEqualsLiteral("steps"),
michael@0	13194	"unexpected initial state");
michael@0	13195
michael@0	13196	nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(2);
michael@0	13197
michael@0	13198	if (!ParseOneOrLargerVariant(val->Item(0), VARIANT_INTEGER, nullptr)) {
michael@0	13199	return false;
michael@0	13200	}
michael@0	13201
michael@0	13202	int32_t type = NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_END;
michael@0	13203	if (ExpectSymbol(',', true)) {
michael@0	13204	if (!GetToken(true)) {
michael@0	13205	return false;
michael@0	13206	}
michael@0	13207	type = -1;
michael@0	13208	if (mToken.mType == eCSSToken_Ident) {
michael@0	13209	if (mToken.mIdent.LowerCaseEqualsLiteral("start")) {
michael@0	13210	type = NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_START;
michael@0	13211	} else if (mToken.mIdent.LowerCaseEqualsLiteral("end")) {
michael@0	13212	type = NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_END;
michael@0	13213	}
michael@0	13214	}
michael@0	13215	if (type == -1) {
michael@0	13216	UngetToken();
michael@0	13217	return false;
michael@0	13218	}
michael@0	13219	}
michael@0	13220	val->Item(1).SetIntValue(type, eCSSUnit_Enumerated);
michael@0	13221
michael@0	13222	if (!ExpectSymbol(')', true)) {
michael@0	13223	return false;
michael@0	13224	}
michael@0	13225
michael@0	13226	aValue.SetArrayValue(val, eCSSUnit_Steps);
michael@0	13227	return true;
michael@0	13228	}
michael@0	13229
michael@0	13230	static nsCSSValueList*
michael@0	13231	AppendValueToList(nsCSSValue& aContainer,
michael@0	13232	nsCSSValueList* aTail,
michael@0	13233	const nsCSSValue& aValue)
michael@0	13234	{
michael@0	13235	nsCSSValueList* entry;
michael@0	13236	if (aContainer.GetUnit() == eCSSUnit_Null) {
michael@0	13237	NS_ABORT_IF_FALSE(!aTail, "should not have an entry");
michael@0	13238	entry = aContainer.SetListValue();
michael@0	13239	} else {
michael@0	13240	NS_ABORT_IF_FALSE(!aTail->mNext, "should not have a next entry");
michael@0	13241	NS_ABORT_IF_FALSE(aContainer.GetUnit() == eCSSUnit_List, "not a list");
michael@0	13242	entry = new nsCSSValueList;
michael@0	13243	aTail->mNext = entry;
michael@0	13244	}
michael@0	13245	entry->mValue = aValue;
michael@0	13246	return entry;
michael@0	13247	}
michael@0	13248
michael@0	13249	CSSParserImpl::ParseAnimationOrTransitionShorthandResult
michael@0	13250	CSSParserImpl::ParseAnimationOrTransitionShorthand(
michael@0	13251	const nsCSSProperty* aProperties,
michael@0	13252	const nsCSSValue* aInitialValues,
michael@0	13253	nsCSSValue* aValues,
michael@0	13254	size_t aNumProperties)
michael@0	13255	{
michael@0	13256	nsCSSValue tempValue;
michael@0	13257	// first see if 'inherit', 'initial' or 'unset' is specified. If one is,
michael@0	13258	// it can be the only thing specified, so don't attempt to parse any
michael@0	13259	// additional properties
michael@0	13260	if (ParseVariant(tempValue, VARIANT_INHERIT, nullptr)) {
michael@0	13261	for (uint32_t i = 0; i < aNumProperties; ++i) {
michael@0	13262	AppendValue(aProperties[i], tempValue);
michael@0	13263	}
michael@0	13264	return eParseAnimationOrTransitionShorthand_Inherit;
michael@0	13265	}
michael@0	13266
michael@0	13267	static const size_t maxNumProperties = 7;
michael@0	13268	NS_ABORT_IF_FALSE(aNumProperties <= maxNumProperties,
michael@0	13269	"can't handle this many properties");
michael@0	13270	nsCSSValueList *cur[maxNumProperties];
michael@0	13271	bool parsedProperty[maxNumProperties];
michael@0	13272
michael@0	13273	for (size_t i = 0; i < aNumProperties; ++i) {
michael@0	13274	cur[i] = nullptr;
michael@0	13275	}
michael@0	13276	bool atEOP = false; // at end of property?
michael@0	13277	for (;;) { // loop over comma-separated transitions or animations
michael@0	13278	// whether a particular subproperty was specified for this
michael@0	13279	// transition or animation
michael@0	13280	bool haveAnyProperty = false;
michael@0	13281	for (size_t i = 0; i < aNumProperties; ++i) {
michael@0	13282	parsedProperty[i] = false;
michael@0	13283	}
michael@0	13284	for (;;) { // loop over values within a transition or animation
michael@0	13285	bool foundProperty = false;
michael@0	13286	// check to see if we're at the end of one full transition or
michael@0	13287	// animation definition (either because we hit a comma or because
michael@0	13288	// we hit the end of the property definition)
michael@0	13289	if (ExpectSymbol(',', true))
michael@0	13290	break;
michael@0	13291	if (CheckEndProperty()) {
michael@0	13292	atEOP = true;
michael@0	13293	break;
michael@0	13294	}
michael@0	13295
michael@0	13296	// else, try to parse the next transition or animation sub-property
michael@0	13297	for (uint32_t i = 0; !foundProperty && i < aNumProperties; ++i) {
michael@0	13298	if (!parsedProperty[i]) {
michael@0	13299	// if we haven't found this property yet, try to parse it
michael@0	13300	if (ParseSingleValueProperty(tempValue, aProperties[i])) {
michael@0	13301	parsedProperty[i] = true;
michael@0	13302	cur[i] = AppendValueToList(aValues[i], cur[i], tempValue);
michael@0	13303	foundProperty = true;
michael@0	13304	haveAnyProperty = true;
michael@0	13305	break; // out of inner loop; continue looking for next sub-property
michael@0	13306	}
michael@0	13307	}
michael@0	13308	}
michael@0	13309	if (!foundProperty) {
michael@0	13310	// We're not at a ',' or at the end of the property, but we couldn't
michael@0	13311	// parse any of the sub-properties, so the declaration is invalid.
michael@0	13312	return eParseAnimationOrTransitionShorthand_Error;
michael@0	13313	}
michael@0	13314	}
michael@0	13315
michael@0	13316	if (!haveAnyProperty) {
michael@0	13317	// Got an empty item.
michael@0	13318	return eParseAnimationOrTransitionShorthand_Error;
michael@0	13319	}
michael@0	13320
michael@0	13321	// We hit the end of the property or the end of one transition
michael@0	13322	// or animation definition, add its components to the list.
michael@0	13323	for (uint32_t i = 0; i < aNumProperties; ++i) {
michael@0	13324	// If all of the subproperties were not explicitly specified, fill
michael@0	13325	// in the missing ones with initial values.
michael@0	13326	if (!parsedProperty[i]) {
michael@0	13327	cur[i] = AppendValueToList(aValues[i], cur[i], aInitialValues[i]);
michael@0	13328	}
michael@0	13329	}
michael@0	13330
michael@0	13331	if (atEOP)
michael@0	13332	break;
michael@0	13333	// else we just hit a ',' so continue parsing the next compound transition
michael@0	13334	}
michael@0	13335
michael@0	13336	return eParseAnimationOrTransitionShorthand_Values;
michael@0	13337	}
michael@0	13338
michael@0	13339	bool
michael@0	13340	CSSParserImpl::ParseTransition()
michael@0	13341	{
michael@0	13342	static const nsCSSProperty kTransitionProperties[] = {
michael@0	13343	eCSSProperty_transition_duration,
michael@0	13344	eCSSProperty_transition_timing_function,
michael@0	13345	// Must check 'transition-delay' after 'transition-duration', since
michael@0	13346	// that's our assumption about what the spec means for the shorthand
michael@0	13347	// syntax (the first time given is the duration, and the second
michael@0	13348	// given is the delay).
michael@0	13349	eCSSProperty_transition_delay,
michael@0	13350	// Must check 'transition-property' after
michael@0	13351	// 'transition-timing-function' since 'transition-property' accepts
michael@0	13352	// any keyword.
michael@0	13353	eCSSProperty_transition_property
michael@0	13354	};
michael@0	13355	static const uint32_t numProps = MOZ_ARRAY_LENGTH(kTransitionProperties);
michael@0	13356	// this is a shorthand property that accepts -property, -delay,
michael@0	13357	// -duration, and -timing-function with some components missing.
michael@0	13358	// there can be multiple transitions, separated with commas
michael@0	13359
michael@0	13360	nsCSSValue initialValues[numProps];
michael@0	13361	initialValues[0].SetFloatValue(0.0, eCSSUnit_Seconds);
michael@0	13362	initialValues[1].SetIntValue(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE,
michael@0	13363	eCSSUnit_Enumerated);
michael@0	13364	initialValues[2].SetFloatValue(0.0, eCSSUnit_Seconds);
michael@0	13365	initialValues[3].SetAllValue();
michael@0	13366
michael@0	13367	nsCSSValue values[numProps];
michael@0	13368
michael@0	13369	ParseAnimationOrTransitionShorthandResult spres =
michael@0	13370	ParseAnimationOrTransitionShorthand(kTransitionProperties,
michael@0	13371	initialValues, values, numProps);
michael@0	13372	if (spres != eParseAnimationOrTransitionShorthand_Values) {
michael@0	13373	return spres != eParseAnimationOrTransitionShorthand_Error;
michael@0	13374	}
michael@0	13375
michael@0	13376	// Make two checks on the list for 'transition-property':
michael@0	13377	// + If there is more than one item, then none of the items can be
michael@0	13378	// 'none'.
michael@0	13379	// + None of the items can be 'inherit', 'initial' or 'unset'.
michael@0	13380	{
michael@0	13381	NS_ABORT_IF_FALSE(kTransitionProperties[3] ==
michael@0	13382	eCSSProperty_transition_property,
michael@0	13383	"array index mismatch");
michael@0	13384	nsCSSValueList *l = values[3].GetListValue();
michael@0	13385	bool multipleItems = !!l->mNext;
michael@0	13386	do {
michael@0	13387	const nsCSSValue& val = l->mValue;
michael@0	13388	if (val.GetUnit() == eCSSUnit_None) {
michael@0	13389	if (multipleItems) {
michael@0	13390	// This is a syntax error.
michael@0	13391	return false;
michael@0	13392	}
michael@0	13393
michael@0	13394	// Unbox a solitary 'none'.
michael@0	13395	values[3].SetNoneValue();
michael@0	13396	break;
michael@0	13397	}
michael@0	13398	if (val.GetUnit() == eCSSUnit_Ident) {
michael@0	13399	nsDependentString str(val.GetStringBufferValue());
michael@0	13400	if (str.EqualsLiteral("inherit") ||
michael@0	13401	str.EqualsLiteral("initial") ||
michael@0	13402	(str.EqualsLiteral("unset") &&
michael@0	13403	nsLayoutUtils::UnsetValueEnabled())) {
michael@0	13404	return false;
michael@0	13405	}
michael@0	13406	}
michael@0	13407	} while ((l = l->mNext));
michael@0	13408	}
michael@0	13409
michael@0	13410	// Save all parsed transition sub-properties in mTempData
michael@0	13411	for (uint32_t i = 0; i < numProps; ++i) {
michael@0	13412	AppendValue(kTransitionProperties[i], values[i]);
michael@0	13413	}
michael@0	13414	return true;
michael@0	13415	}
michael@0	13416
michael@0	13417	bool
michael@0	13418	CSSParserImpl::ParseAnimation()
michael@0	13419	{
michael@0	13420	static const nsCSSProperty kAnimationProperties[] = {
michael@0	13421	eCSSProperty_animation_duration,
michael@0	13422	eCSSProperty_animation_timing_function,
michael@0	13423	// Must check 'animation-delay' after 'animation-duration', since
michael@0	13424	// that's our assumption about what the spec means for the shorthand
michael@0	13425	// syntax (the first time given is the duration, and the second
michael@0	13426	// given is the delay).
michael@0	13427	eCSSProperty_animation_delay,
michael@0	13428	eCSSProperty_animation_direction,
michael@0	13429	eCSSProperty_animation_fill_mode,
michael@0	13430	eCSSProperty_animation_iteration_count,
michael@0	13431	// Must check 'animation-name' after 'animation-timing-function',
michael@0	13432	// 'animation-direction', 'animation-fill-mode',
michael@0	13433	// 'animation-iteration-count', and 'animation-play-state' since
michael@0	13434	// 'animation-name' accepts any keyword.
michael@0	13435	eCSSProperty_animation_name
michael@0	13436	};
michael@0	13437	static const uint32_t numProps = MOZ_ARRAY_LENGTH(kAnimationProperties);
michael@0	13438	// this is a shorthand property that accepts -property, -delay,
michael@0	13439	// -duration, and -timing-function with some components missing.
michael@0	13440	// there can be multiple animations, separated with commas
michael@0	13441
michael@0	13442	nsCSSValue initialValues[numProps];
michael@0	13443	initialValues[0].SetFloatValue(0.0, eCSSUnit_Seconds);
michael@0	13444	initialValues[1].SetIntValue(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE,
michael@0	13445	eCSSUnit_Enumerated);
michael@0	13446	initialValues[2].SetFloatValue(0.0, eCSSUnit_Seconds);
michael@0	13447	initialValues[3].SetIntValue(NS_STYLE_ANIMATION_DIRECTION_NORMAL, eCSSUnit_Enumerated);
michael@0	13448	initialValues[4].SetIntValue(NS_STYLE_ANIMATION_FILL_MODE_NONE, eCSSUnit_Enumerated);
michael@0	13449	initialValues[5].SetFloatValue(1.0f, eCSSUnit_Number);
michael@0	13450	initialValues[6].SetNoneValue();
michael@0	13451
michael@0	13452	nsCSSValue values[numProps];
michael@0	13453
michael@0	13454	ParseAnimationOrTransitionShorthandResult spres =
michael@0	13455	ParseAnimationOrTransitionShorthand(kAnimationProperties,
michael@0	13456	initialValues, values, numProps);
michael@0	13457	if (spres != eParseAnimationOrTransitionShorthand_Values) {
michael@0	13458	return spres != eParseAnimationOrTransitionShorthand_Error;
michael@0	13459	}
michael@0	13460
michael@0	13461	// Save all parsed animation sub-properties in mTempData
michael@0	13462	for (uint32_t i = 0; i < numProps; ++i) {
michael@0	13463	AppendValue(kAnimationProperties[i], values[i]);
michael@0	13464	}
michael@0	13465	return true;
michael@0	13466	}
michael@0	13467
michael@0	13468	bool
michael@0	13469	CSSParserImpl::ParseShadowItem(nsCSSValue& aValue, bool aIsBoxShadow)
michael@0	13470	{
michael@0	13471	// A shadow list item is an array, with entries in this sequence:
michael@0	13472	enum {
michael@0	13473	IndexX,
michael@0	13474	IndexY,
michael@0	13475	IndexRadius,
michael@0	13476	IndexSpread, // only for box-shadow
michael@0	13477	IndexColor,
michael@0	13478	IndexInset // only for box-shadow
michael@0	13479	};
michael@0	13480
michael@0	13481	nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(6);
michael@0	13482
michael@0	13483	if (aIsBoxShadow) {
michael@0	13484	// Optional inset keyword (ignore errors)
michael@0	13485	ParseVariant(val->Item(IndexInset), VARIANT_KEYWORD,
michael@0	13486	nsCSSProps::kBoxShadowTypeKTable);
michael@0	13487	}
michael@0	13488
michael@0	13489	nsCSSValue xOrColor;
michael@0	13490	bool haveColor = false;
michael@0	13491	if (!ParseVariant(xOrColor, VARIANT_COLOR | VARIANT_LENGTH | VARIANT_CALC,
michael@0	13492	nullptr)) {
michael@0	13493	return false;
michael@0	13494	}
michael@0	13495	if (xOrColor.IsLengthUnit() || xOrColor.IsCalcUnit()) {
michael@0	13496	val->Item(IndexX) = xOrColor;
michael@0	13497	} else {
michael@0	13498	// Must be a color (as string or color value)
michael@0	13499	NS_ASSERTION(xOrColor.GetUnit() == eCSSUnit_Ident ||
michael@0	13500	xOrColor.GetUnit() == eCSSUnit_EnumColor ||
michael@0	13501	xOrColor.IsNumericColorUnit(),
michael@0	13502	"Must be a color value");
michael@0	13503	val->Item(IndexColor) = xOrColor;
michael@0	13504	haveColor = true;
michael@0	13505
michael@0	13506	// X coordinate mandatory after color
michael@0	13507	if (!ParseVariant(val->Item(IndexX), VARIANT_LENGTH | VARIANT_CALC,
michael@0	13508	nullptr)) {
michael@0	13509	return false;
michael@0	13510	}
michael@0	13511	}
michael@0	13512
michael@0	13513	// Y coordinate; mandatory
michael@0	13514	if (!ParseVariant(val->Item(IndexY), VARIANT_LENGTH | VARIANT_CALC,
michael@0	13515	nullptr)) {
michael@0	13516	return false;
michael@0	13517	}
michael@0	13518
michael@0	13519	// Optional radius. Ignore errors except if they pass a negative
michael@0	13520	// value which we must reject. If we use ParseNonNegativeVariant
michael@0	13521	// we can't tell the difference between an unspecified radius
michael@0	13522	// and a negative radius.
michael@0	13523	if (ParseVariant(val->Item(IndexRadius), VARIANT_LENGTH | VARIANT_CALC,
michael@0	13524	nullptr) &&
michael@0	13525	val->Item(IndexRadius).IsLengthUnit() &&
michael@0	13526	val->Item(IndexRadius).GetFloatValue() < 0) {
michael@0	13527	return false;
michael@0	13528	}
michael@0	13529
michael@0	13530	if (aIsBoxShadow) {
michael@0	13531	// Optional spread
michael@0	13532	ParseVariant(val->Item(IndexSpread), VARIANT_LENGTH | VARIANT_CALC, nullptr);
michael@0	13533	}
michael@0	13534
michael@0	13535	if (!haveColor) {
michael@0	13536	// Optional color
michael@0	13537	ParseVariant(val->Item(IndexColor), VARIANT_COLOR, nullptr);
michael@0	13538	}
michael@0	13539
michael@0	13540	if (aIsBoxShadow && val->Item(IndexInset).GetUnit() == eCSSUnit_Null) {
michael@0	13541	// Optional inset keyword
michael@0	13542	ParseVariant(val->Item(IndexInset), VARIANT_KEYWORD,
michael@0	13543	nsCSSProps::kBoxShadowTypeKTable);
michael@0	13544	}
michael@0	13545
michael@0	13546	aValue.SetArrayValue(val, eCSSUnit_Array);
michael@0	13547	return true;
michael@0	13548	}
michael@0	13549
michael@0	13550	bool
michael@0	13551	CSSParserImpl::ParseShadowList(nsCSSProperty aProperty)
michael@0	13552	{
michael@0	13553	nsAutoParseCompoundProperty compound(this);
michael@0	13554	bool isBoxShadow = aProperty == eCSSProperty_box_shadow;
michael@0	13555
michael@0	13556	nsCSSValue value;
michael@0	13557	// 'inherit', 'initial', 'unset' and 'none' must be alone
michael@0	13558	if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
michael@0	13559	nsCSSValueList* cur = value.SetListValue();
michael@0	13560	for (;;) {
michael@0	13561	if (!ParseShadowItem(cur->mValue, isBoxShadow)) {
michael@0	13562	return false;
michael@0	13563	}
michael@0	13564	if (!ExpectSymbol(',', true)) {
michael@0	13565	break;
michael@0	13566	}
michael@0	13567	cur->mNext = new nsCSSValueList;
michael@0	13568	cur = cur->mNext;
michael@0	13569	}
michael@0	13570	}
michael@0	13571	AppendValue(aProperty, value);
michael@0	13572	return true;
michael@0	13573	}
michael@0	13574
michael@0	13575	int32_t
michael@0	13576	CSSParserImpl::GetNamespaceIdForPrefix(const nsString& aPrefix)
michael@0	13577	{
michael@0	13578	NS_PRECONDITION(!aPrefix.IsEmpty(), "Must have a prefix here");
michael@0	13579
michael@0	13580	int32_t nameSpaceID = kNameSpaceID_Unknown;
michael@0	13581	if (mNameSpaceMap) {
michael@0	13582	// user-specified identifiers are case-sensitive (bug 416106)
michael@0	13583	nsCOMPtr<nsIAtom> prefix = do_GetAtom(aPrefix);
michael@0	13584	if (!prefix) {
michael@0	13585	NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
michael@0	13586	}
michael@0	13587	nameSpaceID = mNameSpaceMap->FindNameSpaceID(prefix);
michael@0	13588	}
michael@0	13589	// else no declared namespaces
michael@0	13590
michael@0	13591	if (nameSpaceID == kNameSpaceID_Unknown) { // unknown prefix, dump it
michael@0	13592	REPORT_UNEXPECTED_P(PEUnknownNamespacePrefix, aPrefix);
michael@0	13593	}
michael@0	13594
michael@0	13595	return nameSpaceID;
michael@0	13596	}
michael@0	13597
michael@0	13598	void
michael@0	13599	CSSParserImpl::SetDefaultNamespaceOnSelector(nsCSSSelector& aSelector)
michael@0	13600	{
michael@0	13601	if (mNameSpaceMap) {
michael@0	13602	aSelector.SetNameSpace(mNameSpaceMap->FindNameSpaceID(nullptr));
michael@0	13603	} else {
michael@0	13604	aSelector.SetNameSpace(kNameSpaceID_Unknown); // wildcard
michael@0	13605	}
michael@0	13606	}
michael@0	13607
michael@0	13608	bool
michael@0	13609	CSSParserImpl::ParsePaint(nsCSSProperty aPropID)
michael@0	13610	{
michael@0	13611	nsCSSValue x, y;
michael@0	13612
michael@0	13613	if (!ParseVariant(x, VARIANT_HC | VARIANT_NONE | VARIANT_URL |
michael@0	13614	VARIANT_OPENTYPE_SVG_KEYWORD,
michael@0	13615	nsCSSProps::kContextPatternKTable)) {
michael@0	13616	return false;
michael@0	13617	}
michael@0	13618
michael@0	13619	bool canHaveFallback = x.GetUnit() == eCSSUnit_URL ||
michael@0	13620	x.GetUnit() == eCSSUnit_Enumerated;
michael@0	13621	if (canHaveFallback) {
michael@0	13622	if (!ParseVariant(y, VARIANT_COLOR | VARIANT_NONE, nullptr))
michael@0	13623	y.SetNoneValue();
michael@0	13624	}
michael@0	13625
michael@0	13626	if (!canHaveFallback) {
michael@0	13627	AppendValue(aPropID, x);
michael@0	13628	} else {
michael@0	13629	nsCSSValue val;
michael@0	13630	val.SetPairValue(x, y);
michael@0	13631	AppendValue(aPropID, val);
michael@0	13632	}
michael@0	13633	return true;
michael@0	13634	}
michael@0	13635
michael@0	13636	bool
michael@0	13637	CSSParserImpl::ParseDasharray()
michael@0	13638	{
michael@0	13639	nsCSSValue value;
michael@0	13640
michael@0	13641	// 'inherit', 'initial', 'unset' and 'none' are only allowed on their own
michael@0	13642	if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE |
michael@0	13643	VARIANT_OPENTYPE_SVG_KEYWORD,
michael@0	13644	nsCSSProps::kStrokeContextValueKTable)) {
michael@0	13645	nsCSSValueList *cur = value.SetListValue();
michael@0	13646	for (;;) {
michael@0	13647	if (!ParseNonNegativeVariant(cur->mValue, VARIANT_LPN, nullptr)) {
michael@0	13648	return false;
michael@0	13649	}
michael@0	13650	if (CheckEndProperty()) {
michael@0	13651	break;
michael@0	13652	}
michael@0	13653	// skip optional commas between elements
michael@0	13654	(void)ExpectSymbol(',', true);
michael@0	13655
michael@0	13656	cur->mNext = new nsCSSValueList;
michael@0	13657	cur = cur->mNext;
michael@0	13658	}
michael@0	13659	}
michael@0	13660	AppendValue(eCSSProperty_stroke_dasharray, value);
michael@0	13661	return true;
michael@0	13662	}
michael@0	13663
michael@0	13664	bool
michael@0	13665	CSSParserImpl::ParseMarker()
michael@0	13666	{
michael@0	13667	nsCSSValue marker;
michael@0	13668	if (ParseSingleValueProperty(marker, eCSSProperty_marker_end)) {
michael@0	13669	AppendValue(eCSSProperty_marker_end, marker);
michael@0	13670	AppendValue(eCSSProperty_marker_mid, marker);
michael@0	13671	AppendValue(eCSSProperty_marker_start, marker);
michael@0	13672	return true;
michael@0	13673	}
michael@0	13674	return false;
michael@0	13675	}
michael@0	13676
michael@0	13677	bool
michael@0	13678	CSSParserImpl::ParsePaintOrder()
michael@0	13679	{
michael@0	13680	static_assert
michael@0	13681	((1 << NS_STYLE_PAINT_ORDER_BITWIDTH) > NS_STYLE_PAINT_ORDER_LAST_VALUE,
michael@0	13682	"bitfield width insufficient for paint-order constants");
michael@0	13683
michael@0	13684	static const KTableValue kPaintOrderKTable[] = {
michael@0	13685	eCSSKeyword_normal, NS_STYLE_PAINT_ORDER_NORMAL,
michael@0	13686	eCSSKeyword_fill, NS_STYLE_PAINT_ORDER_FILL,
michael@0	13687	eCSSKeyword_stroke, NS_STYLE_PAINT_ORDER_STROKE,
michael@0	13688	eCSSKeyword_markers, NS_STYLE_PAINT_ORDER_MARKERS,
michael@0	13689	eCSSKeyword_UNKNOWN,-1
michael@0	13690	};
michael@0	13691
michael@0	13692	static_assert(MOZ_ARRAY_LENGTH(kPaintOrderKTable) ==
michael@0	13693	2 * (NS_STYLE_PAINT_ORDER_LAST_VALUE + 2),
michael@0	13694	"missing paint-order values in kPaintOrderKTable");
michael@0	13695
michael@0	13696	nsCSSValue value;
michael@0	13697	if (!ParseVariant(value, VARIANT_HK, kPaintOrderKTable)) {
michael@0	13698	return false;
michael@0	13699	}
michael@0	13700
michael@0	13701	uint32_t seen = 0;
michael@0	13702	uint32_t order = 0;
michael@0	13703	uint32_t position = 0;
michael@0	13704
michael@0	13705	// Ensure that even cast to a signed int32_t when stored in CSSValue,
michael@0	13706	// we have enough space for the entire paint-order value.
michael@0	13707	static_assert
michael@0	13708	(NS_STYLE_PAINT_ORDER_BITWIDTH * NS_STYLE_PAINT_ORDER_LAST_VALUE < 32,
michael@0	13709	"seen and order not big enough");
michael@0	13710
michael@0	13711	if (value.GetUnit() == eCSSUnit_Enumerated) {
michael@0	13712	uint32_t component = static_cast<uint32_t>(value.GetIntValue());
michael@0	13713	if (component != NS_STYLE_PAINT_ORDER_NORMAL) {
michael@0	13714	bool parsedOK = true;
michael@0	13715	for (;;) {
michael@0	13716	if (seen & (1 << component)) {
michael@0	13717	// Already seen this component.
michael@0	13718	UngetToken();
michael@0	13719	parsedOK = false;
michael@0	13720	break;
michael@0	13721	}
michael@0	13722	seen |= (1 << component);
michael@0	13723	order |= (component << position);
michael@0	13724	position += NS_STYLE_PAINT_ORDER_BITWIDTH;
michael@0	13725	if (!ParseEnum(value, kPaintOrderKTable)) {
michael@0	13726	break;
michael@0	13727	}
michael@0	13728	component = value.GetIntValue();
michael@0	13729	if (component == NS_STYLE_PAINT_ORDER_NORMAL) {
michael@0	13730	// Can't have "normal" in the middle of the list of paint components.
michael@0	13731	UngetToken();
michael@0	13732	parsedOK = false;
michael@0	13733	break;
michael@0	13734	}
michael@0	13735	}
michael@0	13736
michael@0	13737	// Fill in the remaining paint-order components in the order of their
michael@0	13738	// constant values.
michael@0	13739	if (parsedOK) {
michael@0	13740	for (component = 1;
michael@0	13741	component <= NS_STYLE_PAINT_ORDER_LAST_VALUE;
michael@0	13742	component++) {
michael@0	13743	if (!(seen & (1 << component))) {
michael@0	13744	order |= (component << position);
michael@0	13745	position += NS_STYLE_PAINT_ORDER_BITWIDTH;
michael@0	13746	}
michael@0	13747	}
michael@0	13748	}
michael@0	13749	}
michael@0	13750
michael@0	13751	static_assert(NS_STYLE_PAINT_ORDER_NORMAL == 0,
michael@0	13752	"unexpected value for NS_STYLE_PAINT_ORDER_NORMAL");
michael@0	13753	value.SetIntValue(static_cast<int32_t>(order), eCSSUnit_Enumerated);
michael@0	13754	}
michael@0	13755
michael@0	13756	AppendValue(eCSSProperty_paint_order, value);
michael@0	13757	return true;
michael@0	13758	}
michael@0	13759
michael@0	13760	bool
michael@0	13761	CSSParserImpl::BackslashDropped()
michael@0	13762	{
michael@0	13763	return mScanner->GetEOFCharacters() &
michael@0	13764	nsCSSScanner::eEOFCharacters_DropBackslash;
michael@0	13765	}
michael@0	13766
michael@0	13767	void
michael@0	13768	CSSParserImpl::AppendImpliedEOFCharacters(nsAString& aResult)
michael@0	13769	{
michael@0	13770	nsCSSScanner::AppendImpliedEOFCharacters(mScanner->GetEOFCharacters(),
michael@0	13771	aResult);
michael@0	13772	}
michael@0	13773
michael@0	13774	bool
michael@0	13775	CSSParserImpl::ParseAll()
michael@0	13776	{
michael@0	13777	nsCSSValue value;
michael@0	13778	if (!ParseVariant(value, VARIANT_INHERIT, nullptr)) {
michael@0	13779	return false;
michael@0	13780	}
michael@0	13781
michael@0	13782	CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, eCSSProperty_all) {
michael@0	13783	AppendValue(*p, value);
michael@0	13784	}
michael@0	13785	return true;
michael@0	13786	}
michael@0	13787
michael@0	13788	bool
michael@0	13789	CSSParserImpl::ParseVariableDeclaration(CSSVariableDeclarations::Type* aType,
michael@0	13790	nsString& aValue)
michael@0	13791	{
michael@0	13792	CSSVariableDeclarations::Type type;
michael@0	13793	nsString variableValue;
michael@0	13794	bool dropBackslash;
michael@0	13795	nsString impliedCharacters;
michael@0	13796
michael@0	13797	// Record the token stream while parsing a variable value.
michael@0	13798	if (!mInSupportsCondition) {
michael@0	13799	mScanner->StartRecording();
michael@0	13800	}
michael@0	13801	if (!ParseValueWithVariables(&type, &dropBackslash, impliedCharacters,
michael@0	13802	nullptr, nullptr)) {
michael@0	13803	if (!mInSupportsCondition) {
michael@0	13804	mScanner->StopRecording();
michael@0	13805	}
michael@0	13806	return false;
michael@0	13807	}
michael@0	13808
michael@0	13809	if (!mInSupportsCondition) {
michael@0	13810	if (type == CSSVariableDeclarations::eTokenStream) {
michael@0	13811	// This was indeed a token stream value, so store it in variableValue.
michael@0	13812	mScanner->StopRecording(variableValue);
michael@0	13813	if (dropBackslash) {
michael@0	13814	MOZ_ASSERT(!variableValue.IsEmpty() &&
michael@0	13815	variableValue[variableValue.Length() - 1] == '\\');
michael@0	13816	variableValue.Truncate(variableValue.Length() - 1);
michael@0	13817	}
michael@0	13818	variableValue.Append(impliedCharacters);
michael@0	13819	} else {
michael@0	13820	// This was either 'inherit' or 'initial'; we don't need the recorded
michael@0	13821	// input.
michael@0	13822	mScanner->StopRecording();
michael@0	13823	}
michael@0	13824	}
michael@0	13825
michael@0	13826	if (mHavePushBack && type == CSSVariableDeclarations::eTokenStream) {
michael@0	13827	// If we came to the end of a valid variable declaration and a token was
michael@0	13828	// pushed back, then it would have been ended by '!', ')', ';', ']' or '}'.
michael@0	13829	// We need to remove it from the recorded variable value.
michael@0	13830	MOZ_ASSERT(mToken.IsSymbol('!') ||
michael@0	13831	mToken.IsSymbol(')') ||
michael@0	13832	mToken.IsSymbol(';') ||
michael@0	13833	mToken.IsSymbol(']') ||
michael@0	13834	mToken.IsSymbol('}'));
michael@0	13835	if (!mInSupportsCondition) {
michael@0	13836	MOZ_ASSERT(!variableValue.IsEmpty());
michael@0	13837	MOZ_ASSERT(variableValue[variableValue.Length() - 1] == mToken.mSymbol);
michael@0	13838	variableValue.Truncate(variableValue.Length() - 1);
michael@0	13839	}
michael@0	13840	}
michael@0	13841
michael@0	13842	*aType = type;
michael@0	13843	aValue = variableValue;
michael@0	13844	return true;
michael@0	13845	}
michael@0	13846
michael@0	13847	bool
michael@0	13848	CSSParserImpl::ParseValueWithVariables(CSSVariableDeclarations::Type* aType,
michael@0	13849	bool* aDropBackslash,
michael@0	13850	nsString& aImpliedCharacters,
michael@0	13851	void (*aFunc)(const nsAString&, void*),
michael@0	13852	void* aData)
michael@0	13853	{
michael@0	13854	// A property value is invalid if it contains variable references and also:
michael@0	13855	//
michael@0	13856	// * has unbalanced parens, brackets or braces
michael@0	13857	// * has any BAD_STRING or BAD_URL tokens
michael@0	13858	// * has any ';' or '!' tokens at the top level of a variable reference's
michael@0	13859	// fallback
michael@0	13860	//
michael@0	13861	// If the property is a custom property (i.e. a variable declaration), then
michael@0	13862	// it is also invalid if it consists of no tokens, such as:
michael@0	13863	//
michael@0	13864	// --invalid:;
michael@0	13865	//
michael@0	13866	// Note that is valid for a custom property to have a value that consists
michael@0	13867	// solely of white space, such as:
michael@0	13868	//
michael@0	13869	// --valid: ;
michael@0	13870
michael@0	13871	// Stack of closing characters for currently open constructs.
michael@0	13872	StopSymbolCharStack stack;
michael@0	13873
michael@0	13874	// Indexes into ')' characters in |stack| that correspond to "var(". This
michael@0	13875	// is used to stop parsing when we encounter a '!' or ';' at the top level
michael@0	13876	// of a variable reference's fallback.
michael@0	13877	nsAutoTArray<uint32_t, 16> references;
michael@0	13878
michael@0	13879	if (!GetToken(false)) {
michael@0	13880	// Variable value was empty since we reached EOF.
michael@0	13881	REPORT_UNEXPECTED_EOF(PEVariableEOF);
michael@0	13882	return false;
michael@0	13883	}
michael@0	13884
michael@0	13885	if (mToken.mType == eCSSToken_Symbol &&
michael@0	13886	(mToken.mSymbol == '!' ||
michael@0	13887	mToken.mSymbol == ')' ||
michael@0	13888	mToken.mSymbol == ';' ||
michael@0	13889	mToken.mSymbol == ']' ||
michael@0	13890	mToken.mSymbol == '}')) {
michael@0	13891	// Variable value was empty since we reached the end of the construct.
michael@0	13892	UngetToken();
michael@0	13893	REPORT_UNEXPECTED_TOKEN(PEVariableEmpty);
michael@0	13894	return false;
michael@0	13895	}
michael@0	13896
michael@0	13897	if (mToken.mType == eCSSToken_Whitespace) {
michael@0	13898	if (!GetToken(true)) {
michael@0	13899	// Variable value was white space only. This is valid.
michael@0	13900	MOZ_ASSERT(!BackslashDropped());
michael@0	13901	*aType = CSSVariableDeclarations::eTokenStream;
michael@0	13902	*aDropBackslash = false;
michael@0	13903	AppendImpliedEOFCharacters(aImpliedCharacters);
michael@0	13904	return true;
michael@0	13905	}
michael@0	13906	}
michael@0	13907
michael@0	13908	// Look for 'initial', 'inherit' or 'unset' as the first non-white space
michael@0	13909	// token.
michael@0	13910	CSSVariableDeclarations::Type type = CSSVariableDeclarations::eTokenStream;
michael@0	13911	if (mToken.mType == eCSSToken_Ident) {
michael@0	13912	if (mToken.mIdent.LowerCaseEqualsLiteral("initial")) {
michael@0	13913	type = CSSVariableDeclarations::eInitial;
michael@0	13914	} else if (mToken.mIdent.LowerCaseEqualsLiteral("inherit")) {
michael@0	13915	type = CSSVariableDeclarations::eInherit;
michael@0	13916	} else if (mToken.mIdent.LowerCaseEqualsLiteral("unset")) {
michael@0	13917	type = CSSVariableDeclarations::eUnset;
michael@0	13918	}
michael@0	13919	}
michael@0	13920
michael@0	13921	if (type != CSSVariableDeclarations::eTokenStream) {
michael@0	13922	if (!GetToken(true)) {
michael@0	13923	// Variable value was 'initial' or 'inherit' followed by EOF.
michael@0	13924	MOZ_ASSERT(!BackslashDropped());
michael@0	13925	*aType = type;
michael@0	13926	*aDropBackslash = false;
michael@0	13927	AppendImpliedEOFCharacters(aImpliedCharacters);
michael@0	13928	return true;
michael@0	13929	}
michael@0	13930	UngetToken();
michael@0	13931	if (mToken.mType == eCSSToken_Symbol &&
michael@0	13932	(mToken.mSymbol == '!' ||
michael@0	13933	mToken.mSymbol == ')' ||
michael@0	13934	mToken.mSymbol == ';' ||
michael@0	13935	mToken.mSymbol == ']' ||
michael@0	13936	mToken.mSymbol == '}')) {
michael@0	13937	// Variable value was 'initial' or 'inherit' followed by the end
michael@0	13938	// of the declaration.
michael@0	13939	MOZ_ASSERT(!BackslashDropped());
michael@0	13940	*aType = type;
michael@0	13941	*aDropBackslash = false;
michael@0	13942	return true;
michael@0	13943	}
michael@0	13944	}
michael@0	13945
michael@0	13946	do {
michael@0	13947	switch (mToken.mType) {
michael@0	13948	case eCSSToken_Symbol:
michael@0	13949	if (mToken.mSymbol == '(') {
michael@0	13950	stack.AppendElement(')');
michael@0	13951	} else if (mToken.mSymbol == '[') {
michael@0	13952	stack.AppendElement(']');
michael@0	13953	} else if (mToken.mSymbol == '{') {
michael@0	13954	stack.AppendElement('}');
michael@0	13955	} else if (mToken.mSymbol == ';' ||
michael@0	13956	mToken.mSymbol == '!') {
michael@0	13957	if (stack.IsEmpty()) {
michael@0	13958	UngetToken();
michael@0	13959	MOZ_ASSERT(!BackslashDropped());
michael@0	13960	*aType = CSSVariableDeclarations::eTokenStream;
michael@0	13961	*aDropBackslash = false;
michael@0	13962	return true;
michael@0	13963	} else if (!references.IsEmpty() &&
michael@0	13964	references.LastElement() == stack.Length() - 1) {
michael@0	13965	REPORT_UNEXPECTED_TOKEN(PEInvalidVariableTokenFallback);
michael@0	13966	SkipUntilAllOf(stack);
michael@0	13967	return false;
michael@0	13968	}
michael@0	13969	} else if (mToken.mSymbol == ')' ||
michael@0	13970	mToken.mSymbol == ']' ||
michael@0	13971	mToken.mSymbol == '}') {
michael@0	13972	for (;;) {
michael@0	13973	if (stack.IsEmpty()) {
michael@0	13974	UngetToken();
michael@0	13975	MOZ_ASSERT(!BackslashDropped());
michael@0	13976	*aType = CSSVariableDeclarations::eTokenStream;
michael@0	13977	*aDropBackslash = false;
michael@0	13978	return true;
michael@0	13979	}
michael@0	13980	char16_t c = stack.LastElement();
michael@0	13981	stack.TruncateLength(stack.Length() - 1);
michael@0	13982	if (!references.IsEmpty() &&
michael@0	13983	references.LastElement() == stack.Length()) {
michael@0	13984	references.TruncateLength(references.Length() - 1);
michael@0	13985	}
michael@0	13986	if (mToken.mSymbol == c) {
michael@0	13987	break;
michael@0	13988	}
michael@0	13989	}
michael@0	13990	}
michael@0	13991	break;
michael@0	13992
michael@0	13993	case eCSSToken_Function:
michael@0	13994	if (mToken.mIdent.LowerCaseEqualsLiteral("var")) {
michael@0	13995	if (!GetToken(true)) {
michael@0	13996	// EOF directly after "var(".
michael@0	13997	REPORT_UNEXPECTED_EOF(PEExpectedVariableNameEOF);
michael@0	13998	return false;
michael@0	13999	}
michael@0	14000	if (mToken.mType != eCSSToken_Ident ||
michael@0	14001	!nsCSSProps::IsCustomPropertyName(mToken.mIdent)) {
michael@0	14002	// There must be an identifier directly after the "var(" and
michael@0	14003	// it must be a custom property name.
michael@0	14004	UngetToken();
michael@0	14005	REPORT_UNEXPECTED_TOKEN(PEExpectedVariableName);
michael@0	14006	SkipUntil(')');
michael@0	14007	SkipUntilAllOf(stack);
michael@0	14008	return false;
michael@0	14009	}
michael@0	14010	if (aFunc) {
michael@0	14011	MOZ_ASSERT(Substring(mToken.mIdent, 0,
michael@0	14012	CSS_CUSTOM_NAME_PREFIX_LENGTH).
michael@0	14013	EqualsLiteral("--"));
michael@0	14014	// remove '--'
michael@0	14015	const nsDependentSubstring varName =
michael@0	14016	Substring(mToken.mIdent, CSS_CUSTOM_NAME_PREFIX_LENGTH);
michael@0	14017	aFunc(varName, aData);
michael@0	14018	}
michael@0	14019	if (!GetToken(true)) {
michael@0	14020	// EOF right after "var(<ident>".
michael@0	14021	stack.AppendElement(')');
michael@0	14022	} else if (mToken.IsSymbol(',')) {
michael@0	14023	// Variable reference with fallback.
michael@0	14024	if (!GetToken(false) || mToken.IsSymbol(')')) {
michael@0	14025	// Comma must be followed by at least one fallback token.
michael@0	14026	REPORT_UNEXPECTED(PEExpectedVariableFallback);
michael@0	14027	SkipUntilAllOf(stack);
michael@0	14028	return false;
michael@0	14029	}
michael@0	14030	UngetToken();
michael@0	14031	references.AppendElement(stack.Length());
michael@0	14032	stack.AppendElement(')');
michael@0	14033	} else if (mToken.IsSymbol(')')) {
michael@0	14034	// Correctly closed variable reference.
michael@0	14035	} else {
michael@0	14036	// Malformed variable reference.
michael@0	14037	REPORT_UNEXPECTED_TOKEN(PEExpectedVariableCommaOrCloseParen);
michael@0	14038	SkipUntil(')');
michael@0	14039	SkipUntilAllOf(stack);
michael@0	14040	return false;
michael@0	14041	}
michael@0	14042	} else {
michael@0	14043	stack.AppendElement(')');
michael@0	14044	}
michael@0	14045	break;
michael@0	14046
michael@0	14047	case eCSSToken_Bad_String:
michael@0	14048	SkipUntilAllOf(stack);
michael@0	14049	return false;
michael@0	14050
michael@0	14051	case eCSSToken_Bad_URL:
michael@0	14052	SkipUntil(')');
michael@0	14053	SkipUntilAllOf(stack);
michael@0	14054	return false;
michael@0	14055
michael@0	14056	default:
michael@0	14057	break;
michael@0	14058	}
michael@0	14059	} while (GetToken(true));
michael@0	14060
michael@0	14061	// Append any implied closing characters.
michael@0	14062	*aDropBackslash = BackslashDropped();
michael@0	14063	AppendImpliedEOFCharacters(aImpliedCharacters);
michael@0	14064	uint32_t i = stack.Length();
michael@0	14065	while (i--) {
michael@0	14066	aImpliedCharacters.Append(stack[i]);
michael@0	14067	}
michael@0	14068
michael@0	14069	*aType = type;
michael@0	14070	return true;
michael@0	14071	}
michael@0	14072
michael@0	14073	} // anonymous namespace
michael@0	14074
michael@0	14075	// Recycling of parser implementation objects
michael@0	14076
michael@0	14077	static CSSParserImpl* gFreeList = nullptr;
michael@0	14078
michael@0	14079	nsCSSParser::nsCSSParser(mozilla::css::Loader* aLoader,
michael@0	14080	nsCSSStyleSheet* aSheet)
michael@0	14081	{
michael@0	14082	CSSParserImpl *impl = gFreeList;
michael@0	14083	if (impl) {
michael@0	14084	gFreeList = impl->mNextFree;
michael@0	14085	impl->mNextFree = nullptr;
michael@0	14086	} else {
michael@0	14087	impl = new CSSParserImpl();
michael@0	14088	}
michael@0	14089
michael@0	14090	if (aLoader) {
michael@0	14091	impl->SetChildLoader(aLoader);
michael@0	14092	impl->SetQuirkMode(aLoader->GetCompatibilityMode() ==
michael@0	14093	eCompatibility_NavQuirks);
michael@0	14094	}
michael@0	14095	if (aSheet) {
michael@0	14096	impl->SetStyleSheet(aSheet);
michael@0	14097	}
michael@0	14098
michael@0	14099	mImpl = static_cast<void*>(impl);
michael@0	14100	}
michael@0	14101
michael@0	14102	nsCSSParser::~nsCSSParser()
michael@0	14103	{
michael@0	14104	CSSParserImpl *impl = static_cast<CSSParserImpl*>(mImpl);
michael@0	14105	impl->Reset();
michael@0	14106	impl->mNextFree = gFreeList;
michael@0	14107	gFreeList = impl;
michael@0	14108	}
michael@0	14109
michael@0	14110	/* static */ void
michael@0	14111	nsCSSParser::Shutdown()
michael@0	14112	{
michael@0	14113	CSSParserImpl *tofree = gFreeList;
michael@0	14114	CSSParserImpl *next;
michael@0	14115	while (tofree)
michael@0	14116	{
michael@0	14117	next = tofree->mNextFree;
michael@0	14118	delete tofree;
michael@0	14119	tofree = next;
michael@0	14120	}
michael@0	14121	}
michael@0	14122
michael@0	14123	// Wrapper methods
michael@0	14124
michael@0	14125	nsresult
michael@0	14126	nsCSSParser::SetStyleSheet(nsCSSStyleSheet* aSheet)
michael@0	14127	{
michael@0	14128	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14129	SetStyleSheet(aSheet);
michael@0	14130	}
michael@0	14131
michael@0	14132	nsresult
michael@0	14133	nsCSSParser::SetQuirkMode(bool aQuirkMode)
michael@0	14134	{
michael@0	14135	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14136	SetQuirkMode(aQuirkMode);
michael@0	14137	}
michael@0	14138
michael@0	14139	nsresult
michael@0	14140	nsCSSParser::SetChildLoader(mozilla::css::Loader* aChildLoader)
michael@0	14141	{
michael@0	14142	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14143	SetChildLoader(aChildLoader);
michael@0	14144	}
michael@0	14145
michael@0	14146	nsresult
michael@0	14147	nsCSSParser::ParseSheet(const nsAString& aInput,
michael@0	14148	nsIURI* aSheetURI,
michael@0	14149	nsIURI* aBaseURI,
michael@0	14150	nsIPrincipal* aSheetPrincipal,
michael@0	14151	uint32_t aLineNumber,
michael@0	14152	bool aAllowUnsafeRules)
michael@0	14153	{
michael@0	14154	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14155	ParseSheet(aInput, aSheetURI, aBaseURI, aSheetPrincipal, aLineNumber,
michael@0	14156	aAllowUnsafeRules);
michael@0	14157	}
michael@0	14158
michael@0	14159	nsresult
michael@0	14160	nsCSSParser::ParseStyleAttribute(const nsAString& aAttributeValue,
michael@0	14161	nsIURI* aDocURI,
michael@0	14162	nsIURI* aBaseURI,
michael@0	14163	nsIPrincipal* aNodePrincipal,
michael@0	14164	css::StyleRule** aResult)
michael@0	14165	{
michael@0	14166	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14167	ParseStyleAttribute(aAttributeValue, aDocURI, aBaseURI,
michael@0	14168	aNodePrincipal, aResult);
michael@0	14169	}
michael@0	14170
michael@0	14171	nsresult
michael@0	14172	nsCSSParser::ParseDeclarations(const nsAString& aBuffer,
michael@0	14173	nsIURI* aSheetURI,
michael@0	14174	nsIURI* aBaseURI,
michael@0	14175	nsIPrincipal* aSheetPrincipal,
michael@0	14176	css::Declaration* aDeclaration,
michael@0	14177	bool* aChanged)
michael@0	14178	{
michael@0	14179	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14180	ParseDeclarations(aBuffer, aSheetURI, aBaseURI, aSheetPrincipal,
michael@0	14181	aDeclaration, aChanged);
michael@0	14182	}
michael@0	14183
michael@0	14184	nsresult
michael@0	14185	nsCSSParser::ParseRule(const nsAString& aRule,
michael@0	14186	nsIURI* aSheetURI,
michael@0	14187	nsIURI* aBaseURI,
michael@0	14188	nsIPrincipal* aSheetPrincipal,
michael@0	14189	css::Rule** aResult)
michael@0	14190	{
michael@0	14191	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14192	ParseRule(aRule, aSheetURI, aBaseURI, aSheetPrincipal, aResult);
michael@0	14193	}
michael@0	14194
michael@0	14195	nsresult
michael@0	14196	nsCSSParser::ParseProperty(const nsCSSProperty aPropID,
michael@0	14197	const nsAString& aPropValue,
michael@0	14198	nsIURI* aSheetURI,
michael@0	14199	nsIURI* aBaseURI,
michael@0	14200	nsIPrincipal* aSheetPrincipal,
michael@0	14201	css::Declaration* aDeclaration,
michael@0	14202	bool* aChanged,
michael@0	14203	bool aIsImportant,
michael@0	14204	bool aIsSVGMode)
michael@0	14205	{
michael@0	14206	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14207	ParseProperty(aPropID, aPropValue, aSheetURI, aBaseURI,
michael@0	14208	aSheetPrincipal, aDeclaration, aChanged,
michael@0	14209	aIsImportant, aIsSVGMode);
michael@0	14210	}
michael@0	14211
michael@0	14212	nsresult
michael@0	14213	nsCSSParser::ParseVariable(const nsAString& aVariableName,
michael@0	14214	const nsAString& aPropValue,
michael@0	14215	nsIURI* aSheetURI,
michael@0	14216	nsIURI* aBaseURI,
michael@0	14217	nsIPrincipal* aSheetPrincipal,
michael@0	14218	css::Declaration* aDeclaration,
michael@0	14219	bool* aChanged,
michael@0	14220	bool aIsImportant)
michael@0	14221	{
michael@0	14222	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14223	ParseVariable(aVariableName, aPropValue, aSheetURI, aBaseURI,
michael@0	14224	aSheetPrincipal, aDeclaration, aChanged, aIsImportant);
michael@0	14225	}
michael@0	14226
michael@0	14227	void
michael@0	14228	nsCSSParser::ParseMediaList(const nsSubstring& aBuffer,
michael@0	14229	nsIURI* aURI,
michael@0	14230	uint32_t aLineNumber,
michael@0	14231	nsMediaList* aMediaList,
michael@0	14232	bool aHTMLMode)
michael@0	14233	{
michael@0	14234	static_cast<CSSParserImpl*>(mImpl)->
michael@0	14235	ParseMediaList(aBuffer, aURI, aLineNumber, aMediaList, aHTMLMode);
michael@0	14236	}
michael@0	14237
michael@0	14238	bool
michael@0	14239	nsCSSParser::ParseColorString(const nsSubstring& aBuffer,
michael@0	14240	nsIURI* aURI,
michael@0	14241	uint32_t aLineNumber,
michael@0	14242	nsCSSValue& aValue)
michael@0	14243	{
michael@0	14244	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14245	ParseColorString(aBuffer, aURI, aLineNumber, aValue);
michael@0	14246	}
michael@0	14247
michael@0	14248	nsresult
michael@0	14249	nsCSSParser::ParseSelectorString(const nsSubstring& aSelectorString,
michael@0	14250	nsIURI* aURI,
michael@0	14251	uint32_t aLineNumber,
michael@0	14252	nsCSSSelectorList** aSelectorList)
michael@0	14253	{
michael@0	14254	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14255	ParseSelectorString(aSelectorString, aURI, aLineNumber, aSelectorList);
michael@0	14256	}
michael@0	14257
michael@0	14258	already_AddRefed<nsCSSKeyframeRule>
michael@0	14259	nsCSSParser::ParseKeyframeRule(const nsSubstring& aBuffer,
michael@0	14260	nsIURI* aURI,
michael@0	14261	uint32_t aLineNumber)
michael@0	14262	{
michael@0	14263	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14264	ParseKeyframeRule(aBuffer, aURI, aLineNumber);
michael@0	14265	}
michael@0	14266
michael@0	14267	bool
michael@0	14268	nsCSSParser::ParseKeyframeSelectorString(const nsSubstring& aSelectorString,
michael@0	14269	nsIURI* aURI,
michael@0	14270	uint32_t aLineNumber,
michael@0	14271	InfallibleTArray<float>& aSelectorList)
michael@0	14272	{
michael@0	14273	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14274	ParseKeyframeSelectorString(aSelectorString, aURI, aLineNumber,
michael@0	14275	aSelectorList);
michael@0	14276	}
michael@0	14277
michael@0	14278	bool
michael@0	14279	nsCSSParser::EvaluateSupportsDeclaration(const nsAString& aProperty,
michael@0	14280	const nsAString& aValue,
michael@0	14281	nsIURI* aDocURL,
michael@0	14282	nsIURI* aBaseURL,
michael@0	14283	nsIPrincipal* aDocPrincipal)
michael@0	14284	{
michael@0	14285	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14286	EvaluateSupportsDeclaration(aProperty, aValue, aDocURL, aBaseURL,
michael@0	14287	aDocPrincipal);
michael@0	14288	}
michael@0	14289
michael@0	14290	bool
michael@0	14291	nsCSSParser::EvaluateSupportsCondition(const nsAString& aCondition,
michael@0	14292	nsIURI* aDocURL,
michael@0	14293	nsIURI* aBaseURL,
michael@0	14294	nsIPrincipal* aDocPrincipal)
michael@0	14295	{
michael@0	14296	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14297	EvaluateSupportsCondition(aCondition, aDocURL, aBaseURL, aDocPrincipal);
michael@0	14298	}
michael@0	14299
michael@0	14300	bool
michael@0	14301	nsCSSParser::EnumerateVariableReferences(const nsAString& aPropertyValue,
michael@0	14302	VariableEnumFunc aFunc,
michael@0	14303	void* aData)
michael@0	14304	{
michael@0	14305	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14306	EnumerateVariableReferences(aPropertyValue, aFunc, aData);
michael@0	14307	}
michael@0	14308
michael@0	14309	bool
michael@0	14310	nsCSSParser::ResolveVariableValue(const nsAString& aPropertyValue,
michael@0	14311	const CSSVariableValues* aVariables,
michael@0	14312	nsString& aResult,
michael@0	14313	nsCSSTokenSerializationType& aFirstToken,
michael@0	14314	nsCSSTokenSerializationType& aLastToken)
michael@0	14315	{
michael@0	14316	return static_cast<CSSParserImpl*>(mImpl)->
michael@0	14317	ResolveVariableValue(aPropertyValue, aVariables,
michael@0	14318	aResult, aFirstToken, aLastToken);
michael@0	14319	}
michael@0	14320
michael@0	14321	void
michael@0	14322	nsCSSParser::ParsePropertyWithVariableReferences(
michael@0	14323	nsCSSProperty aPropertyID,
michael@0	14324	nsCSSProperty aShorthandPropertyID,
michael@0	14325	const nsAString& aValue,
michael@0	14326	const CSSVariableValues* aVariables,
michael@0	14327	nsRuleData* aRuleData,
michael@0	14328	nsIURI* aDocURL,
michael@0	14329	nsIURI* aBaseURL,
michael@0	14330	nsIPrincipal* aDocPrincipal,
michael@0	14331	nsCSSStyleSheet* aSheet,
michael@0	14332	uint32_t aLineNumber,
michael@0	14333	uint32_t aLineOffset)
michael@0	14334	{
michael@0	14335	static_cast<CSSParserImpl*>(mImpl)->
michael@0	14336	ParsePropertyWithVariableReferences(aPropertyID, aShorthandPropertyID,
michael@0	14337	aValue, aVariables, aRuleData, aDocURL,
michael@0	14338	aBaseURL, aDocPrincipal, aSheet,
michael@0	14339	aLineNumber, aLineOffset);
michael@0	14340	}