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/GroupRule.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::GroupRule {
  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,
  63                                                          css::GroupRule)
  64
  65   bool IsCCLeaf() const final;
  66
  67   StyleLockedPageRule* Raw() const { return mRawRule; }
  68   void SetRawAfterClone(RefPtr<StyleLockedPageRule>);
  69
  70   // WebIDL interfaces
  71   StyleCssRuleType Type() const final;
  72   void GetCssText(nsACString& aCssText) const final;
  73   nsICSSDeclaration* Style();
  74
  75   void GetSelectorText(nsACString& aSelectorText) const;
  76   void SetSelectorText(const nsACString& aSelectorText);
  77
  78   size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;
  79
  80   already_AddRefed<StyleLockedCssRules> GetOrCreateRawRules() final;
  81
  82 #ifdef DEBUG
  83   void List(FILE* out = stdout, int32_t aIndent = 0) const final;
  84 #endif
  85
  86   JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
  87
  88  private:
  89   ~CSSPageRule() = default;
  90
  91   // For computing the offset of mDecls.
  92   friend class CSSPageRuleDeclaration;
  93
  94   RefPtr<StyleLockedPageRule> mRawRule;
  95   CSSPageRuleDeclaration mDecls;
  96 };
  97
  98 CSSPageRule* CSSPageRuleDeclaration::Rule() {
  99   return reinterpret_cast<CSSPageRule*>(reinterpret_cast<uint8_t*>(this) -
 100                                         offsetof(CSSPageRule, mDecls));
 101 }
 102
 103 const CSSPageRule* CSSPageRuleDeclaration::Rule() const {
 104   return reinterpret_cast<const CSSPageRule*>(
 105       reinterpret_cast<const uint8_t*>(this) - offsetof(CSSPageRule, mDecls));
 106 }
 107
 108 }  // namespace dom
 109 }  // namespace mozilla
 110
 111 #endif  // mozilla_dom_CSSPageRule_h