/* -*- 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/BindingStyleRule.h"

#include "mozilla/ServoBindingTypes.h"

#include "mozilla/WeakPtr.h"

#include "nsDOMCSSDeclaration.h"

namespace mozilla {

class DeclarationBlock;

namespace dom {

class DocGroup;

class CSSStyleRule;

class CSSStyleRuleDeclaration final : public nsDOMCSSDeclaration

{

public:

  NS_DECL_ISUPPORTS_INHERITED

  css::Rule* GetParentRule() final;

  nsINode* GetParentObject() final;

protected:

  mozilla::DeclarationBlock* GetOrCreateCSSDeclaration(

    Operation aOperation, mozilla::DeclarationBlock** aCreated) final;

  nsresult SetCSSDeclaration(DeclarationBlock* aDecl,

                             MutationClosureData* aClosureData) final;

  nsIDocument* DocToUpdate() final;

  ParsingEnvironment

  GetParsingEnvironment(nsIPrincipal* aSubjectPrincipal) const final;

private:

  // For accessing the constructor.

  friend class CSSStyleRule;

  explicit CSSStyleRuleDeclaration(

    already_AddRefed<RawServoDeclarationBlock> aDecls);

  ~CSSStyleRuleDeclaration();

  inline CSSStyleRule* Rule();

  inline const CSSStyleRule* Rule() const;

  RefPtr<DeclarationBlock> mDecls;

};

class CSSStyleRule final : public BindingStyleRule

                         , public SupportsWeakPtr<CSSStyleRule>

{

public:

  CSSStyleRule(already_AddRefed<RawServoStyleRule> 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::Rule)

  bool IsCCLeaf() const final MOZ_MUST_OVERRIDE;

  MOZ_DECLARE_WEAKREFERENCE_TYPENAME(CSSStyleRule)

  uint32_t GetSelectorCount() override;

  nsresult GetSelectorText(uint32_t aSelectorIndex,

                           nsAString& aText) override;

  nsresult GetSpecificity(uint32_t aSelectorIndex,

                          uint64_t* aSpecificity) override;

  nsresult SelectorMatchesElement(dom::Element* aElement,

                                  uint32_t aSelectorIndex,

                                  const nsAString& aPseudo,

                                  bool* aMatches) override;

  NotNull<DeclarationBlock*> GetDeclarationBlock() const override;

  // WebIDL interface

  uint16_t Type() const final { return dom::CSSRule_Binding::STYLE_RULE; }

  void GetCssText(nsAString& aCssText) const final;

  void GetSelectorText(nsAString& aSelectorText) final;

  void SetSelectorText(const nsAString& aSelectorText) final;

  nsICSSDeclaration* Style() final;

  RawServoStyleRule* Raw() const { return mRawRule; }

  // 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

private:

  ~CSSStyleRule() {}

  // For computing the offset of mDecls.

  friend class CSSStyleRuleDeclaration;

  RefPtr<RawServoStyleRule> 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