CSSNestedDeclarations.h

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/* -*- 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_CSSNestedDeclarations_h

#define mozilla_CSSNestedDeclarations_h

#include "mozilla/css/Rule.h"

#include "mozilla/ServoBindingTypes.h"

#include "nsDOMCSSDeclaration.h"

namespace mozilla {

class DeclarationBlock;

namespace dom {

class DocGroup;

class CSSNestedDeclarations;

class CSSNestedDeclarationsDeclaration 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 CSSNestedDeclarations;

  explicit CSSNestedDeclarationsDeclaration(

      already_AddRefed<StyleLockedDeclarationBlock> aDecls);

  ~CSSNestedDeclarationsDeclaration();

  inline CSSNestedDeclarations* Rule();

  inline const CSSNestedDeclarations* Rule() const;

  void SetRawAfterClone(RefPtr<StyleLockedDeclarationBlock>);

  RefPtr<DeclarationBlock> mDecls;

};

class CSSNestedDeclarations final : public css::Rule {

 public:

  CSSNestedDeclarations(

      already_AddRefed<StyleLockedNestedDeclarationsRule> aRawRule,

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

      uint32_t aColumn);

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(CSSNestedDeclarations,

                                                         css::Rule)

  bool IsCCLeaf() const final MOZ_MUST_OVERRIDE;

  // WebIDL interface

  StyleCssRuleType Type() const final;

  void GetCssText(nsACString& aCssText) const final;

  nsICSSDeclaration* Style() { return &mDecls; }

  StyleLockedNestedDeclarationsRule* Raw() const { return mRawRule.get(); }

  StyleLockedDeclarationBlock* RawStyle() const;

  void SetRawAfterClone(RefPtr<StyleLockedNestedDeclarationsRule>);

  // 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:

  ~CSSNestedDeclarations() = default;

  void GetSelectorDataAtIndex(uint32_t aSelectorIndex, bool aDesugared,

                              nsACString* aText, uint64_t* aSpecificity);

  // For computing the offset of mDecls.

  friend class CSSNestedDeclarationsDeclaration;

  RefPtr<StyleLockedNestedDeclarationsRule> mRawRule;

  CSSNestedDeclarationsDeclaration mDecls;

};

CSSNestedDeclarations* CSSNestedDeclarationsDeclaration::Rule() {

  return reinterpret_cast<CSSNestedDeclarations*>(

      reinterpret_cast<uint8_t*>(this) -

      offsetof(CSSNestedDeclarations, mDecls));

const CSSNestedDeclarations* CSSNestedDeclarationsDeclaration::Rule() const {

  return reinterpret_cast<const CSSNestedDeclarations*>(

      reinterpret_cast<const uint8_t*>(this) -

      offsetof(CSSNestedDeclarations, mDecls));

// CSSNestedDeclarations is the only rule type that doesn't end up with "Rule".

// This alias helps for consistency.

using CSSNestedDeclarationsRule = CSSNestedDeclarations;

}  // namespace dom

}  // namespace mozilla

#endif  // mozilla_CSSNestedDeclarations_h