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comparison: layout/style/nsStyleUtil.h
layout/style/nsStyleUtil.h
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- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:6f63bcc12391 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 #ifndef nsStyleUtil_h___ | |
| 6 #define nsStyleUtil_h___ | |
| 7 | |
| 8 #include "nsCoord.h" | |
| 9 #include "nsCSSProperty.h" | |
| 10 #include "nsString.h" | |
| 11 #include "nsTArrayForwardDeclare.h" | |
| 12 | |
| 13 class nsCSSValue; | |
| 14 class nsStringComparator; | |
| 15 class nsStyleCoord; | |
| 16 class nsIContent; | |
| 17 class nsIPrincipal; | |
| 18 class nsIURI; | |
| 19 struct gfxFontFeature; | |
| 20 struct gfxAlternateValue; | |
| 21 class nsCSSValueList; | |
| 22 | |
| 23 // Style utility functions | |
| 24 class nsStyleUtil { | |
| 25 public: | |
| 26 | |
| 27 static bool DashMatchCompare(const nsAString& aAttributeValue, | |
| 28 const nsAString& aSelectorValue, | |
| 29 const nsStringComparator& aComparator); | |
| 30 | |
| 31 // Append a quoted (with 'quoteChar') and escaped version of aString | |
| 32 // to aResult. 'quoteChar' must be ' or ". | |
| 33 static void AppendEscapedCSSString(const nsAString& aString, | |
| 34 nsAString& aResult, | |
| 35 char16_t quoteChar = '"'); | |
| 36 | |
| 37 // Append the identifier given by |aIdent| to |aResult|, with | |
| 38 // appropriate escaping so that it can be reparsed to the same | |
| 39 // identifier. | |
| 40 // Returns false if |aIdent| contains U+0000 | |
| 41 // Returns true for all other cases | |
| 42 static bool AppendEscapedCSSIdent(const nsAString& aIdent, | |
| 43 nsAString& aResult); | |
| 44 | |
| 45 // Append a bitmask-valued property's value(s) (space-separated) to aResult. | |
| 46 static void AppendBitmaskCSSValue(nsCSSProperty aProperty, | |
| 47 int32_t aMaskedValue, | |
| 48 int32_t aFirstMask, | |
| 49 int32_t aLastMask, | |
| 50 nsAString& aResult); | |
| 51 | |
| 52 static void AppendAngleValue(const nsStyleCoord& aValue, nsAString& aResult); | |
| 53 | |
| 54 static void AppendPaintOrderValue(uint8_t aValue, nsAString& aResult); | |
| 55 | |
| 56 static void AppendFontFeatureSettings(const nsTArray<gfxFontFeature>& aFeatures, | |
| 57 nsAString& aResult); | |
| 58 | |
| 59 static void AppendFontFeatureSettings(const nsCSSValue& src, | |
| 60 nsAString& aResult); | |
| 61 | |
| 62 static void AppendCSSNumber(float aNumber, nsAString& aResult) | |
| 63 { | |
| 64 aResult.AppendFloat(aNumber); | |
| 65 } | |
| 66 | |
| 67 // convert bitmask value to keyword name for a functional alternate | |
| 68 static void GetFunctionalAlternatesName(int32_t aFeature, | |
| 69 nsAString& aFeatureName); | |
| 70 | |
| 71 // Append functional font-variant-alternates values to string | |
| 72 static void | |
| 73 SerializeFunctionalAlternates(const nsTArray<gfxAlternateValue>& aAlternates, | |
| 74 nsAString& aResult); | |
| 75 | |
| 76 // List of functional font-variant-alternates values to feature/value pairs | |
| 77 static void | |
| 78 ComputeFunctionalAlternates(const nsCSSValueList* aList, | |
| 79 nsTArray<gfxAlternateValue>& aAlternateValues); | |
| 80 | |
| 81 /* | |
| 82 * Convert an author-provided floating point number to an integer (0 | |
| 83 * ... 255) appropriate for use in the alpha component of a color. | |
| 84 */ | |
| 85 static uint8_t FloatToColorComponent(float aAlpha) | |
| 86 { | |
| 87 NS_ASSERTION(0.0 <= aAlpha && aAlpha <= 1.0, "out of range"); | |
| 88 return NSToIntRound(aAlpha * 255); | |
| 89 } | |
| 90 | |
| 91 /* | |
| 92 * Convert the alpha component of an nscolor (0 ... 255) to the | |
| 93 * floating point number with the least accurate *decimal* | |
| 94 * representation that is converted to that color. | |
| 95 * | |
| 96 * Should be used only by serialization code. | |
| 97 */ | |
| 98 static float ColorComponentToFloat(uint8_t aAlpha); | |
| 99 | |
| 100 /* | |
| 101 * Does this child count as significant for selector matching? | |
| 102 */ | |
| 103 static bool IsSignificantChild(nsIContent* aChild, | |
| 104 bool aTextIsSignificant, | |
| 105 bool aWhitespaceIsSignificant); | |
| 106 /* | |
| 107 * Does this principal have a CSP that blocks the application of | |
| 108 * inline styles? Returns false if application of the style should | |
| 109 * be blocked. | |
| 110 * | |
| 111 * @param aContent | |
| 112 * The <style> element that the caller wants to know whether to honor. | |
| 113 * Included to check the nonce attribute if one is provided. Allowed to | |
| 114 * be null, if this is for something other than a <style> element (in | |
| 115 * which case nonces won't be checked). | |
| 116 * @param aPrincipal | |
| 117 * The principal of the of the document (*not* of the style sheet). | |
| 118 * The document's principal is where any Content Security Policy that | |
| 119 * should be used to block or allow inline styles will be located. | |
| 120 * @param aSourceURI | |
| 121 * URI of document containing inline style (for reporting violations) | |
| 122 * @param aLineNumber | |
| 123 * Line number of inline style element in the containing document (for | |
| 124 * reporting violations) | |
| 125 * @param aStyleText | |
| 126 * Contents of the inline style element (for reporting violations) | |
| 127 * @param aRv | |
| 128 * Return error code in case of failure | |
| 129 * @return | |
| 130 * Does CSP allow application of the specified inline style? | |
| 131 */ | |
| 132 static bool CSPAllowsInlineStyle(nsIContent* aContent, | |
| 133 nsIPrincipal* aPrincipal, | |
| 134 nsIURI* aSourceURI, | |
| 135 uint32_t aLineNumber, | |
| 136 const nsSubstring& aStyleText, | |
| 137 nsresult* aRv); | |
| 138 | |
| 139 }; | |
| 140 | |
| 141 | |
| 142 #endif /* nsStyleUtil_h___ */ |
