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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : /* representation of CSSStyleRule for stylo */
       8             : 
       9             : #ifndef mozilla_ServoStyleRule_h
      10             : #define mozilla_ServoStyleRule_h
      11             : 
      12             : #include "mozilla/BindingStyleRule.h"
      13             : #include "mozilla/ServoBindingTypes.h"
      14             : #include "mozilla/WeakPtr.h"
      15             : 
      16             : #include "nsICSSStyleRuleDOMWrapper.h"
      17             : #include "nsIDOMCSSStyleRule.h"
      18             : #include "nsICSSStyleRuleDOMWrapper.h"
      19             : #include "nsDOMCSSDeclaration.h"
      20             : 
      21             : namespace mozilla {
      22             : 
      23             : class ServoDeclarationBlock;
      24             : class ServoStyleRule;
      25             : 
      26             : class ServoStyleRuleDeclaration final : public nsDOMCSSDeclaration
      27             : {
      28             : public:
      29             :   NS_DECL_ISUPPORTS_INHERITED
      30             : 
      31             :   NS_IMETHOD GetParentRule(nsIDOMCSSRule** aParent) final;
      32             :   nsINode* GetParentObject() final;
      33             : 
      34             : protected:
      35             :   DeclarationBlock* GetCSSDeclaration(Operation aOperation) final;
      36             :   nsresult SetCSSDeclaration(DeclarationBlock* aDecl) final;
      37             :   nsIDocument* DocToUpdate() final;
      38             :   void GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv) final;
      39             :   ServoCSSParsingEnvironment GetServoCSSParsingEnvironment() const final;
      40             : 
      41             : private:
      42             :   // For accessing the constructor.
      43             :   friend class ServoStyleRule;
      44             : 
      45             :   explicit ServoStyleRuleDeclaration(
      46             :     already_AddRefed<RawServoDeclarationBlock> aDecls);
      47             :   ~ServoStyleRuleDeclaration();
      48             : 
      49             :   inline ServoStyleRule* Rule();
      50             :   inline const ServoStyleRule* Rule() const;
      51             : 
      52             :   RefPtr<ServoDeclarationBlock> mDecls;
      53             : };
      54             : 
      55             : class ServoStyleRule final : public BindingStyleRule
      56             :                            , public nsICSSStyleRuleDOMWrapper
      57             :                            , public SupportsWeakPtr<ServoStyleRule>
      58             : {
      59             : public:
      60             :   ServoStyleRule(already_AddRefed<RawServoStyleRule> aRawRule,
      61             :                  uint32_t aLine, uint32_t aColumn);
      62             : 
      63             :   NS_DECL_ISUPPORTS_INHERITED
      64           0 :   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(ServoStyleRule,
      65             :                                                          css::Rule)
      66             :   bool IsCCLeaf() const final MOZ_MUST_OVERRIDE;
      67             :   NS_DECL_NSIDOMCSSSTYLERULE
      68             : 
      69           0 :   MOZ_DECLARE_WEAKREFERENCE_TYPENAME(ServoStyleRule)
      70             : 
      71             :   // nsICSSStyleRuleDOMWrapper
      72             :   NS_IMETHOD GetCSSStyleRule(BindingStyleRule **aResult) override;
      73             : 
      74             :   uint32_t GetSelectorCount() override;
      75             :   nsresult GetSelectorText(uint32_t aSelectorIndex,
      76             :                            nsAString& aText) override;
      77             :   nsresult GetSpecificity(uint32_t aSelectorIndex,
      78             :                           uint64_t* aSpecificity) override;
      79             :   nsresult SelectorMatchesElement(dom::Element* aElement,
      80             :                                   uint32_t aSelectorIndex,
      81             :                                   const nsAString& aPseudo,
      82             :                                   bool* aMatches) override;
      83             : 
      84             :   // WebIDL interface
      85             :   uint16_t Type() const final;
      86             :   void GetCssTextImpl(nsAString& aCssText) const final;
      87             :   nsICSSDeclaration* Style() final;
      88             : 
      89           0 :   RawServoStyleRule* Raw() const { return mRawRule; }
      90             : 
      91             :   // Methods of mozilla::css::Rule
      92           0 :   int32_t GetType() const final { return css::Rule::STYLE_RULE; }
      93             :   using Rule::GetType;
      94             :   already_AddRefed<Rule> Clone() const final;
      95             :   size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;
      96             : #ifdef DEBUG
      97             :   void List(FILE* out = stdout, int32_t aIndent = 0) const final;
      98             : #endif
      99             : 
     100             : private:
     101           0 :   ~ServoStyleRule() {}
     102             : 
     103             :   // For computing the offset of mDecls.
     104             :   friend class ServoStyleRuleDeclaration;
     105             : 
     106             :   RefPtr<RawServoStyleRule> mRawRule;
     107             :   ServoStyleRuleDeclaration mDecls;
     108             : };
     109             : 
     110             : ServoStyleRule*
     111           0 : ServoStyleRuleDeclaration::Rule()
     112             : {
     113             :   return reinterpret_cast<ServoStyleRule*>(
     114           0 :     reinterpret_cast<uint8_t*>(this) - offsetof(ServoStyleRule, mDecls));
     115             : }
     116             : 
     117             : const ServoStyleRule*
     118           0 : ServoStyleRuleDeclaration::Rule() const
     119             : {
     120             :   return reinterpret_cast<const ServoStyleRule*>(
     121           0 :     reinterpret_cast<const uint8_t*>(this) - offsetof(ServoStyleRule, mDecls));
     122             : }
     123             : 
     124             : } // namespace mozilla
     125             : 
     126             : #endif // mozilla_ServoStyleRule_h