layout/style/CSSMarginRule.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=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 #ifndef mozilla_dom_CSSMarginRule_h
   8 #define mozilla_dom_CSSMarginRule_h
   9
  10 #include "mozilla/css/Rule.h"
  11 #include "mozilla/ServoBindingTypes.h"
  12
  13 #include "nsDOMCSSDeclaration.h"
  14 #include "nsICSSDeclaration.h"
  15
  16 namespace mozilla {
  17 class DeclarationBlock;
  18
  19 namespace dom {
  20 class CSSMarginRule;
  21
  22 class CSSMarginRuleDeclaration final : public nsDOMCSSDeclaration {
  23  public:
  24   NS_DECL_ISUPPORTS_INHERITED
  25
  26   css::Rule* GetParentRule() final;
  27   nsINode* GetAssociatedNode() const final;
  28   nsISupports* GetParentObject() const final;
  29
  30  protected:
  31   DeclarationBlock* GetOrCreateCSSDeclaration(
  32       Operation aOperation, DeclarationBlock** aCreated) final;
  33   nsresult SetCSSDeclaration(DeclarationBlock* aDecl,
  34                              MutationClosureData* aClosureData) final;
  35   Document* DocToUpdate() final { return nullptr; }
  36   nsDOMCSSDeclaration::ParsingEnvironment GetParsingEnvironment(
  37       nsIPrincipal* aSubjectPrincipal) const final;
  38
  39  private:
  40   // For accessing the constructor.
  41   friend class CSSMarginRule;
  42
  43   explicit CSSMarginRuleDeclaration(
  44       already_AddRefed<StyleLockedDeclarationBlock> aDecls);
  45   void SetRawAfterClone(RefPtr<StyleLockedDeclarationBlock>);
  46
  47   ~CSSMarginRuleDeclaration();
  48
  49   inline CSSMarginRule* Rule();
  50   inline const CSSMarginRule* Rule() const;
  51
  52   RefPtr<DeclarationBlock> mDecls;
  53 };
  54
  55 class CSSMarginRule final : public css::Rule {
  56  public:
  57   CSSMarginRule(RefPtr<StyleMarginRule> aRawRule, StyleSheet* aSheet,
  58                 css::Rule* aParentRule, uint32_t aLine, uint32_t aColumn);
  59
  60   NS_DECL_ISUPPORTS_INHERITED
  61   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(CSSMarginRule,
  62                                                          css::Rule)
  63
  64   bool IsCCLeaf() const final;
  65
  66   StyleMarginRule* Raw() const { return mRawRule; }
  67   void SetRawAfterClone(RefPtr<StyleMarginRule>);
  68
  69   // WebIDL interfaces
  70   StyleCssRuleType Type() const final;
  71   void GetCssText(nsACString& aCssText) const final;
  72   nsICSSDeclaration* Style() { return &mDecls; }
  73
  74   void GetName(nsACString& aRuleName) const;
  75
  76   size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;
  77
  78 #ifdef DEBUG
  79   void List(FILE* out = stdout, int32_t aIndent = 0) const final;
  80 #endif
  81
  82   JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
  83
  84  private:
  85   ~CSSMarginRule() = default;
  86
  87   // For computing the offset of mDecls.
  88   friend class CSSMarginRuleDeclaration;
  89
  90   RefPtr<StyleMarginRule> mRawRule;
  91   CSSMarginRuleDeclaration mDecls;
  92 };
  93
  94 CSSMarginRule* CSSMarginRuleDeclaration::Rule() {
  95   return reinterpret_cast<CSSMarginRule*>(reinterpret_cast<uint8_t*>(this) -
  96                                           offsetof(CSSMarginRule, mDecls));
  97 }
  98
  99 const CSSMarginRule* CSSMarginRuleDeclaration::Rule() const {
 100   return reinterpret_cast<const CSSMarginRule*>(
 101       reinterpret_cast<const uint8_t*>(this) - offsetof(CSSMarginRule, mDecls));
 102 }
 103
 104 }  // namespace dom
 105 }  // namespace mozilla
 106
 107 #endif  // mozilla_dom_CSSMarginRule_h