layout/style/CSSPageRule.h

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