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GroupRule.h (2672B)

      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 /*
      8 * internal interface representing CSS style rules that contain other
      9 * rules, such as @media rules
     10 */
     11 
     12 #ifndef mozilla_css_GroupRule_h__
     13 #define mozilla_css_GroupRule_h__
     14 
     15 #include "mozilla/MemoryReporting.h"
     16 #include "mozilla/ServoCSSRuleList.h"
     17 #include "mozilla/css/Rule.h"
     18 #include "nsCycleCollectionParticipant.h"
     19 
     20 namespace mozilla {
     21 
     22 class ErrorResult;
     23 class StyleSheet;
     24 
     25 namespace dom {
     26 class CSSRuleList;
     27 }  // namespace dom
     28 
     29 namespace css {
     30 
     31 // Inherits from Rule so it can be shared between MediaRule and DocumentRule
     32 class GroupRule : public Rule {
     33 protected:
     34  GroupRule(StyleSheet* aSheet, Rule* aParentRule, uint32_t aLineNumber,
     35            uint32_t aColumnNumber);
     36  virtual ~GroupRule();
     37  virtual already_AddRefed<StyleLockedCssRules> GetOrCreateRawRules() = 0;
     38 
     39 public:
     40  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(GroupRule, Rule)
     41  NS_DECL_ISUPPORTS_INHERITED
     42 
     43  GroupRule(const GroupRule&) = delete;
     44  bool IsCCLeaf() const override;
     45 
     46  bool IsGroupRule() const final { return true; }
     47 
     48 #ifdef DEBUG
     49  void List(FILE* out = stdout, int32_t aIndent = 0) const override;
     50 #endif
     51  void DropSheetReference() override;
     52  uint32_t StyleRuleCount() { return CssRules()->Length(); }
     53  Rule* GetStyleRuleAt(int32_t aIndex) { return CssRules()->GetRule(aIndex); }
     54 
     55  void DidSetRawAfterClone() {
     56    if (mRuleList) {
     57      mRuleList->SetRawAfterClone(GetOrCreateRawRules());
     58    }
     59  }
     60 
     61  /*
     62   * The next method should never be called unless you have first called
     63   * WillDirty() on the parent stylesheet.
     64   */
     65  nsresult DeleteStyleRuleAt(uint32_t aIndex) {
     66    return CssRules()->DeleteRule(aIndex);
     67  }
     68 
     69  // non-virtual -- it is only called by subclasses
     70  size_t SizeOfExcludingThis(MallocSizeOf) const;
     71  size_t SizeOfIncludingThis(MallocSizeOf) const override = 0;
     72 
     73  // WebIDL API
     74  ServoCSSRuleList* CssRules();
     75  uint32_t InsertRule(const nsACString& aRule, uint32_t aIndex,
     76                      ErrorResult& aRv);
     77  void DeleteRule(uint32_t aIndex, ErrorResult& aRv);
     78 
     79 private:
     80  RefPtr<ServoCSSRuleList> mRuleList;
     81 };
     82 
     83 // Implementation of WebIDL CSSConditionRule.
     84 class ConditionRule : public GroupRule {
     85 protected:
     86  using GroupRule::GroupRule;
     87 
     88 public:
     89  virtual void GetConditionText(nsACString& aConditionText) = 0;
     90 };
     91 
     92 }  // namespace css
     93 }  // namespace mozilla
     94 
     95 #endif /* mozilla_css_GroupRule_h__ */