diff -r 000000000000 -r 6474c204b198 layout/style/StyleRule.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/StyleRule.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,390 @@
+/* -*- 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__ */