The Tor Browser: layout/style/StyleRule.h@7e26c7da4463 (annotated)

layout/style/StyleRule.h@7e26c7da4463 (annotated)

layout/style/StyleRule.h

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
  * representation of CSS style rules (selectors+declaration) and CSS
  * selectors
  */
 #ifndef mozilla_css_StyleRule_h__
 #define mozilla_css_StyleRule_h__
 #include "mozilla/Attributes.h"
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/css/Rule.h"
 #include "nsString.h"
 #include "nsCOMPtr.h"
 #include "nsCSSPseudoElements.h"
 #include "nsCSSPseudoClasses.h"
 class nsIAtom;
 class nsCSSStyleSheet;
 struct nsCSSSelectorList;
 class nsCSSCompressedDataBlock;
 struct nsAtomList {
 public:
   nsAtomList(nsIAtom* aAtom);
   nsAtomList(const nsString& aAtomValue);
   ~nsAtomList(void);
   /** Do a deep clone.  Should be used only on the first in the linked list. */
   nsAtomList* Clone() const { return Clone(true); }
   size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
   nsCOMPtr<nsIAtom> mAtom;
   nsAtomList*       mNext;
 private:
   nsAtomList* Clone(bool aDeep) const;
   nsAtomList(const nsAtomList& aCopy) MOZ_DELETE;
   nsAtomList& operator=(const nsAtomList& aCopy) MOZ_DELETE;
 };
 struct nsPseudoClassList {
 public:
   nsPseudoClassList(nsCSSPseudoClasses::Type aType);
   nsPseudoClassList(nsCSSPseudoClasses::Type aType, const char16_t *aString);
   nsPseudoClassList(nsCSSPseudoClasses::Type aType, const int32_t *aIntPair);
   nsPseudoClassList(nsCSSPseudoClasses::Type aType,
                     nsCSSSelectorList *aSelectorList /* takes ownership */);
   ~nsPseudoClassList(void);
   /** Do a deep clone.  Should be used only on the first in the linked list. */
   nsPseudoClassList* Clone() const { return Clone(true); }
   size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
   union {
     // For a given value of mType, we have either:
     //   a. no value, which means mMemory is always null
     //      (if none of the conditions for (b), (c), or (d) is true)
     //   b. a string value, which means mString/mMemory is non-null
     //      (if nsCSSPseudoClasses::HasStringArg(mType))
     //   c. an integer pair value, which means mNumbers/mMemory is non-null
     //      (if nsCSSPseudoClasses::HasNthPairArg(mType))
     //   d. a selector list, which means mSelectors is non-null
     //      (if nsCSSPseudoClasses::HasSelectorListArg(mType))
     void*           mMemory; // mString and mNumbers use NS_Alloc/NS_Free
     char16_t*      mString;
     int32_t*        mNumbers;
     nsCSSSelectorList* mSelectors;
   } u;
   nsCSSPseudoClasses::Type mType;
   nsPseudoClassList* mNext;
 private:
   nsPseudoClassList* Clone(bool aDeep) const;
   nsPseudoClassList(const nsPseudoClassList& aCopy) MOZ_DELETE;
   nsPseudoClassList& operator=(const nsPseudoClassList& aCopy) MOZ_DELETE;
 };
 #define NS_ATTR_FUNC_SET        0     // [attr]
 #define NS_ATTR_FUNC_EQUALS     1     // [attr=value]
 #define NS_ATTR_FUNC_INCLUDES   2     // [attr~=value] (space separated)
 #define NS_ATTR_FUNC_DASHMATCH  3     // [attr|=value] ('-' truncated)
 #define NS_ATTR_FUNC_BEGINSMATCH  4   // [attr^=value] (begins with)
 #define NS_ATTR_FUNC_ENDSMATCH  5     // [attr$=value] (ends with)
 #define NS_ATTR_FUNC_CONTAINSMATCH 6  // [attr*=value] (contains substring)
 struct nsAttrSelector {
 public:
   nsAttrSelector(int32_t aNameSpace, const nsString& aAttr);
   nsAttrSelector(int32_t aNameSpace, const nsString& aAttr, uint8_t aFunction,
                  const nsString& aValue, bool aCaseSensitive);
   nsAttrSelector(int32_t aNameSpace, nsIAtom* aLowercaseAttr,
                  nsIAtom* aCasedAttr, uint8_t aFunction,
                  const nsString& aValue, bool aCaseSensitive);
   ~nsAttrSelector(void);
   /** Do a deep clone.  Should be used only on the first in the linked list. */
   nsAttrSelector* Clone() const { return Clone(true); }
   nsString        mValue;
   nsAttrSelector* mNext;
   nsCOMPtr<nsIAtom> mLowercaseAttr;
   nsCOMPtr<nsIAtom> mCasedAttr;
   int32_t         mNameSpace;
   uint8_t         mFunction;
   bool            mCaseSensitive; // If we are in an HTML document,
                                   // is the value case sensitive?
 private:
   nsAttrSelector* Clone(bool aDeep) const;
   nsAttrSelector(const nsAttrSelector& aCopy) MOZ_DELETE;
   nsAttrSelector& operator=(const nsAttrSelector& aCopy) MOZ_DELETE;
 };
 struct nsCSSSelector {
 public:
   nsCSSSelector(void);
   ~nsCSSSelector(void);
   /** Do a deep clone.  Should be used only on the first in the linked list. */
   nsCSSSelector* Clone() const { return Clone(true, true); }
   void Reset(void);
   void SetNameSpace(int32_t aNameSpace);
   void SetTag(const nsString& aTag);
   void AddID(const nsString& aID);
   void AddClass(const nsString& aClass);
   void AddPseudoClass(nsCSSPseudoClasses::Type aType);
   void AddPseudoClass(nsCSSPseudoClasses::Type aType, const char16_t* aString);
   void AddPseudoClass(nsCSSPseudoClasses::Type aType, const int32_t* aIntPair);
   // takes ownership of aSelectorList
   void AddPseudoClass(nsCSSPseudoClasses::Type aType,
                       nsCSSSelectorList* aSelectorList);
   void AddAttribute(int32_t aNameSpace, const nsString& aAttr);
   void AddAttribute(int32_t aNameSpace, const nsString& aAttr, uint8_t aFunc,
                     const nsString& aValue, bool aCaseSensitive);
   void SetOperator(char16_t aOperator);
   inline bool HasTagSelector() const {
     return !!mCasedTag;
   }
   inline bool IsPseudoElement() const {
     return mLowercaseTag && !mCasedTag;
   }
   // Calculate the specificity of this selector (not including its mNext!).
   int32_t CalcWeight() const;
   void ToString(nsAString& aString, nsCSSStyleSheet* aSheet,
                 bool aAppend = false) const;
 private:
   void AddPseudoClassInternal(nsPseudoClassList *aPseudoClass);
   nsCSSSelector* Clone(bool aDeepNext, bool aDeepNegations) const;
   void AppendToStringWithoutCombinators(nsAString& aString,
                                         nsCSSStyleSheet* aSheet) const;
   void AppendToStringWithoutCombinatorsOrNegations(nsAString& aString,
                                                    nsCSSStyleSheet* aSheet,
                                                    bool aIsNegated)
                                                         const;
   // Returns true if this selector can have a namespace specified (which
   // happens if and only if the default namespace would apply to this
   // selector).
   bool CanBeNamespaced(bool aIsNegated) const;
   // Calculate the specificity of this selector (not including its mNext
   // or its mNegations).
   int32_t CalcWeightWithoutNegations() const;
 public:
   // Get and set the selector's pseudo type
   nsCSSPseudoElements::Type PseudoType() const {
     return static_cast<nsCSSPseudoElements::Type>(mPseudoType);
   }
   void SetPseudoType(nsCSSPseudoElements::Type aType) {
     NS_ASSERTION(static_cast<int32_t>(aType) >= INT16_MIN &&
                  static_cast<int32_t>(aType) <= INT16_MAX,
                  "Out of bounds - this will overflow mPseudoType");
     mPseudoType = static_cast<int16_t>(aType);
   }
   size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
   // For case-sensitive documents, mLowercaseTag is the same as mCasedTag,
   // but in case-insensitive documents (HTML) mLowercaseTag is lowercase.
   // Also, for pseudo-elements mCasedTag will be null but mLowercaseTag
   // contains their name.
   nsCOMPtr<nsIAtom> mLowercaseTag;
   nsCOMPtr<nsIAtom> mCasedTag;
   nsAtomList*     mIDList;
   nsAtomList*     mClassList;
   nsPseudoClassList* mPseudoClassList; // atom for the pseudo, string for
                                        // the argument to functional pseudos
   nsAttrSelector* mAttrList;
   nsCSSSelector*  mNegations;
   nsCSSSelector*  mNext;
   int32_t         mNameSpace;
   char16_t       mOperator;
 private:
   // int16_t to make sure it packs well with mOperator
   int16_t        mPseudoType;
   nsCSSSelector(const nsCSSSelector& aCopy) MOZ_DELETE;
   nsCSSSelector& operator=(const nsCSSSelector& aCopy) MOZ_DELETE;
 };
 /**
  * A selector list is the unit of selectors that each style rule has.
  * For example, "P B, H1 B { ... }" would be a selector list with two
  * items (where each |nsCSSSelectorList| object's |mSelectors| has
  * an |mNext| for the P or H1).  We represent them as linked lists.
  */
 class inDOMUtils;
 struct nsCSSSelectorList {
   nsCSSSelectorList(void);
   ~nsCSSSelectorList(void);
   /**
    * Create a new selector and push it onto the beginning of |mSelectors|,
    * setting its |mNext| to the current value of |mSelectors|.  If there is an
    * earlier selector, set its |mOperator| to |aOperator|; else |aOperator|
    * must be char16_t(0).
    * Returns the new selector.
    * The list owns the new selector.
    * The caller is responsible for updating |mWeight|.
    */
   nsCSSSelector* AddSelector(char16_t aOperator);
   /**
    * Should be used only on the first in the list
    */
   void ToString(nsAString& aResult, nsCSSStyleSheet* aSheet);
   /**
    * Do a deep clone.  Should be used only on the first in the list.
    */
   nsCSSSelectorList* Clone() const { return Clone(true); }
   size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
   nsCSSSelector*     mSelectors;
   int32_t            mWeight;
   nsCSSSelectorList* mNext;
 protected:
   friend class inDOMUtils;
   nsCSSSelectorList* Clone(bool aDeep) const;
 private:
   nsCSSSelectorList(const nsCSSSelectorList& aCopy) MOZ_DELETE;
   nsCSSSelectorList& operator=(const nsCSSSelectorList& aCopy) MOZ_DELETE;
 };
 // 464bab7a-2fce-4f30-ab44-b7a5f3aae57d
 #define NS_CSS_STYLE_RULE_IMPL_CID \
 { 0x464bab7a, 0x2fce, 0x4f30, \
   { 0xab, 0x44, 0xb7, 0xa5, 0xf3, 0xaa, 0xe5, 0x7d } }
 namespace mozilla {
 namespace css {
 class Declaration;
 class DOMCSSStyleRule;
 class StyleRule;
 class ImportantRule : public nsIStyleRule {
 public:
   ImportantRule(Declaration *aDeclaration);
   NS_DECL_ISUPPORTS
   // nsIStyleRule interface
   virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
 #ifdef DEBUG
   virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
 #endif
 protected:
   virtual ~ImportantRule();
   // Not an owning reference; the StyleRule that owns this
   // ImportantRule also owns the mDeclaration, and any rule node
   // pointing to this rule keeps that StyleRule alive as well.
   Declaration* mDeclaration;
   friend class StyleRule;
 };
 class StyleRule MOZ_FINAL : public Rule
 {
  public:
   StyleRule(nsCSSSelectorList* aSelector,
             Declaration *aDeclaration);
 private:
   // for |Clone|
   StyleRule(const StyleRule& aCopy);
   // for |DeclarationChanged|
   StyleRule(StyleRule& aCopy,
             Declaration *aDeclaration);
 public:
   NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_RULE_IMPL_CID)
   NS_DECL_ISUPPORTS
   // null for style attribute
   nsCSSSelectorList* Selector() { return mSelector; }
   uint32_t GetLineNumber() const { return mLineNumber; }
   uint32_t GetColumnNumber() const { return mColumnNumber; }
   void SetLineNumberAndColumnNumber(uint32_t aLineNumber,
                                     uint32_t aColumnNumber)
   { mLineNumber = aLineNumber; mColumnNumber = aColumnNumber; }
   Declaration* GetDeclaration() const { return mDeclaration; }
   /**
    * Return a new |nsIStyleRule| instance that replaces the current
    * one, with |aDecl| replacing the previous declaration. Due to the
    * |nsIStyleRule| contract of immutability, this must be called if
    * the declaration is modified.
    *
    * |DeclarationChanged| handles replacing the object in the container
    * sheet or group rule if |aHandleContainer| is true.
    */
   already_AddRefed<StyleRule>
   DeclarationChanged(Declaration* aDecl, bool aHandleContainer);
   nsIStyleRule* GetImportantRule() const { return mImportantRule; }
   /**
    * The rule processor must call this method before calling
    * nsRuleWalker::Forward on this rule during rule matching.
    */
   void RuleMatched();
   // hooks for DOM rule
   void GetCssText(nsAString& aCssText);
   void SetCssText(const nsAString& aCssText);
   void GetSelectorText(nsAString& aSelectorText);
   void SetSelectorText(const nsAString& aSelectorText);
   virtual int32_t GetType() const;
   virtual already_AddRefed<Rule> Clone() const;
   virtual nsIDOMCSSRule* GetDOMRule();
   virtual nsIDOMCSSRule* GetExistingDOMRule();
   // The new mapping function.
   virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
 #ifdef DEBUG
   virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
 #endif
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
 private:
   ~StyleRule();
 private:
   nsCSSSelectorList*      mSelector; // null for style attribute
   Declaration*            mDeclaration;
   ImportantRule*          mImportantRule; // initialized by RuleMatched
   DOMCSSStyleRule*        mDOMRule;
   // Keep the same type so that MSVC packs them.
   uint32_t                mLineNumber;
   uint32_t                mColumnNumber : 31;
   uint32_t                mWasMatched : 1;
 private:
   StyleRule& operator=(const StyleRule& aCopy) MOZ_DELETE;
 };
 NS_DEFINE_STATIC_IID_ACCESSOR(StyleRule, NS_CSS_STYLE_RULE_IMPL_CID)
 } // namespace css
 } // namespace mozilla
 #endif /* mozilla_css_StyleRule_h__ */

The Tor Browser / annotate

layout/style/StyleRule.h@7e26c7da4463 (annotated)

layout/style/StyleRule.h