CSSStyleRule.h - mozsearch

Enable keyboard shortcuts

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_CSSStyleRule_h

#define mozilla_CSSStyleRule_h

#include "mozilla/css/GroupRule.h"

#include "mozilla/ServoBindingTypes.h"

#include "nsDOMCSSDeclaration.h"

namespace mozilla {

class DeclarationBlock;

namespace dom {

class DocGroup;

class CSSStyleRule;

struct SelectorWarning;

class CSSStyleRuleDeclaration final : public nsDOMCSSDeclaration {

 public:

  NS_DECL_ISUPPORTS_INHERITED

  css::Rule* GetParentRule() final;

  nsINode* GetAssociatedNode() const final;

  nsISupports* GetParentObject() const final;

 protected:

  DeclarationBlock* GetOrCreateCSSDeclaration(

      Operation aOperation, DeclarationBlock** aCreated) final;

  nsresult SetCSSDeclaration(DeclarationBlock* aDecl,

                             MutationClosureData* aClosureData) final;

  ParsingEnvironment GetParsingEnvironment(

      nsIPrincipal* aSubjectPrincipal) const final;

 private:

  // For accessing the constructor.

  friend class CSSStyleRule;

  explicit CSSStyleRuleDeclaration(

      already_AddRefed<StyleLockedDeclarationBlock> aDecls);

  ~CSSStyleRuleDeclaration();

  inline CSSStyleRule* Rule();

  inline const CSSStyleRule* Rule() const;

  void SetRawAfterClone(RefPtr<StyleLockedDeclarationBlock>);

  RefPtr<DeclarationBlock> mDecls;

};

class CSSStyleRule final : public css::GroupRule {

 public:

  CSSStyleRule(already_AddRefed<StyleLockedStyleRule> aRawRule,

               StyleSheet* aSheet, css::Rule* aParentRule, uint32_t aLine,

               uint32_t aColumn);

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(CSSStyleRule,

                                                         css::GroupRule)

  bool IsCCLeaf() const final MOZ_MUST_OVERRIDE;

  uint32_t SelectorCount() const;

  void SelectorTextAt(uint32_t aSelectorIndex, bool aDesugared,

                      nsACString& aText);

  uint64_t SelectorSpecificityAt(uint32_t aSelectorIndex, bool aDesugared);

  bool SelectorMatchesElement(uint32_t aSelectorIndex, dom::Element&,

                              const nsAString& aPseudo,

                              bool aRelevantLinkVisited);

  NotNull<DeclarationBlock*> GetDeclarationBlock() const;

  void GetSelectorWarnings(nsTArray<SelectorWarning>& aResult) const;

  already_AddRefed<nsINodeList> QuerySelectorAll(nsINode& aRoot);

  // WebIDL interface

  StyleCssRuleType Type() const final;

  void GetCssText(nsACString& aCssText) const final;

  void GetSelectorText(nsACString& aSelectorText);

  void SetSelectorText(const nsACString& aSelectorText);

  nsICSSDeclaration* Style() { return &mDecls; }

  StyleLockedStyleRule* Raw() const { return mRawRule; }

  StyleLockedDeclarationBlock* RawStyle() const;

  void SetRawAfterClone(RefPtr<StyleLockedStyleRule>);

  already_AddRefed<StyleLockedCssRules> GetOrCreateRawRules() final;

  // Methods of mozilla::css::Rule

  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;

#ifdef DEBUG

  void List(FILE* out = stdout, int32_t aIndent = 0) const final;

#endif

  JSObject* WrapObject(JSContext*, JS::Handle<JSObject*> aGivenProto) override;

 private:

  ~CSSStyleRule() = default;

  void GetSelectorDataAtIndex(uint32_t aSelectorIndex, bool aDesugared,

                              nsACString* aText, uint64_t* aSpecificity);

  // For computing the offset of mDecls.

  friend class CSSStyleRuleDeclaration;

  RefPtr<StyleLockedStyleRule> mRawRule;

  CSSStyleRuleDeclaration mDecls;

};

CSSStyleRule* CSSStyleRuleDeclaration::Rule() {

  return reinterpret_cast<CSSStyleRule*>(reinterpret_cast<uint8_t*>(this) -

                                         offsetof(CSSStyleRule, mDecls));

const CSSStyleRule* CSSStyleRuleDeclaration::Rule() const {

  return reinterpret_cast<const CSSStyleRule*>(

      reinterpret_cast<const uint8_t*>(this) - offsetof(CSSStyleRule, mDecls));

}  // namespace dom

}  // namespace mozilla

#endif  // mozilla_CSSStyleRule_h