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CSSPageRule.h (3676B)

      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/ServoBindingTypes.h"
     11 #include "mozilla/css/GroupRule.h"
     12 #include "nsDOMCSSDeclaration.h"
     13 #include "nsICSSDeclaration.h"
     14 // The following include provides nsCSSProps::PropertyIDLName(), used by
     15 // generated CSSPageDescriptorsBinding.cpp
     16 // TODO alaskanemily: Ideally it would only be included from there.
     17 #include "nsCSSProps.h"
     18 
     19 namespace mozilla {
     20 class DeclarationBlock;
     21 
     22 namespace dom {
     23 class DocGroup;
     24 class CSSPageRule;
     25 
     26 class CSSPageRuleDeclaration final : public nsDOMCSSDeclaration {
     27 public:
     28  NS_DECL_ISUPPORTS_INHERITED
     29 
     30  css::Rule* GetParentRule() final;
     31  nsINode* GetAssociatedNode() const final;
     32  nsISupports* GetParentObject() const final;
     33 
     34  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
     35 
     36 protected:
     37  DeclarationBlock* GetOrCreateCSSDeclaration(
     38      Operation aOperation, DeclarationBlock** aCreated) final;
     39  nsresult SetCSSDeclaration(DeclarationBlock* aDecl,
     40                             MutationClosureData* aClosureData) final;
     41  nsDOMCSSDeclaration::ParsingEnvironment GetParsingEnvironment(
     42      nsIPrincipal* aSubjectPrincipal) const final;
     43 
     44 private:
     45  // For accessing the constructor.
     46  friend class CSSPageRule;
     47 
     48  explicit CSSPageRuleDeclaration(
     49      already_AddRefed<StyleLockedDeclarationBlock> aDecls);
     50  void SetRawAfterClone(RefPtr<StyleLockedDeclarationBlock>);
     51 
     52  ~CSSPageRuleDeclaration();
     53 
     54  inline CSSPageRule* Rule();
     55  inline const CSSPageRule* Rule() const;
     56 
     57  RefPtr<DeclarationBlock> mDecls;
     58 };
     59 
     60 class CSSPageRule final : public css::GroupRule {
     61 public:
     62  CSSPageRule(RefPtr<StyleLockedPageRule> aRawRule, StyleSheet* aSheet,
     63              css::Rule* aParentRule, uint32_t aLine, uint32_t aColumn);
     64 
     65  NS_DECL_ISUPPORTS_INHERITED
     66  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(CSSPageRule,
     67                                                         css::GroupRule)
     68 
     69  bool IsCCLeaf() const final;
     70 
     71  StyleLockedPageRule* Raw() const { return mRawRule; }
     72  void SetRawAfterClone(RefPtr<StyleLockedPageRule>);
     73 
     74  // WebIDL interfaces
     75  StyleCssRuleType Type() const final;
     76  void GetCssText(nsACString& aCssText) const final;
     77  CSSPageRuleDeclaration* Style() { return &mDecls; }
     78 
     79  void GetSelectorText(nsACString& aSelectorText) const;
     80  void SetSelectorText(const nsACString& aSelectorText);
     81 
     82  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;
     83 
     84  already_AddRefed<StyleLockedCssRules> GetOrCreateRawRules() final;
     85 
     86 #ifdef DEBUG
     87  void List(FILE* out = stdout, int32_t aIndent = 0) const final;
     88 #endif
     89 
     90  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
     91 
     92 private:
     93  ~CSSPageRule() = default;
     94 
     95  // For computing the offset of mDecls.
     96  friend class CSSPageRuleDeclaration;
     97 
     98  RefPtr<StyleLockedPageRule> mRawRule;
     99  CSSPageRuleDeclaration mDecls;
    100 };
    101 
    102 CSSPageRule* CSSPageRuleDeclaration::Rule() {
    103  return reinterpret_cast<CSSPageRule*>(reinterpret_cast<uint8_t*>(this) -
    104                                        offsetof(CSSPageRule, mDecls));
    105 }
    106 
    107 const CSSPageRule* CSSPageRuleDeclaration::Rule() const {
    108  return reinterpret_cast<const CSSPageRule*>(
    109      reinterpret_cast<const uint8_t*>(this) - offsetof(CSSPageRule, mDecls));
    110 }
    111 
    112 }  // namespace dom
    113 }  // namespace mozilla
    114 
    115 #endif  // mozilla_dom_CSSPageRule_h