layout/style/nsHTMLCSSStyleSheet.h
author Cameron McCormack <cam@mcc.id.au>
Tue, 04 Aug 2015 17:27:53 +1000
changeset 287739 9bcc3233f3c8f847e37aa465d9f541776db6f8da
parent 284279 91d6e262b662a0b4e47358665e222d3927337af9
child 287754 01576b408ea703f6abba09d8e38628723df18c75
permissions -rw-r--r--
Bug 1180118 - Part 5: Add a RestyleHintData outparam to HasAttributeDependentStyle for use with eRestyle_SomeDescendants. r=bzbarsky

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

/*
 * style sheet and style rule processor representing style attributes
 */

#ifndef nsHTMLCSSStyleSheet_h_
#define nsHTMLCSSStyleSheet_h_

#include "mozilla/Attributes.h"
#include "mozilla/MemoryReporting.h"

#include "nsDataHashtable.h"
#include "nsIStyleRuleProcessor.h"

class nsRuleWalker;
struct MiscContainer;

namespace mozilla {
namespace dom {
class Element;
} // namespace dom
} // namespace mozilla

class nsHTMLCSSStyleSheet final : public nsIStyleRuleProcessor
{
public:
  nsHTMLCSSStyleSheet();

  NS_DECL_ISUPPORTS

  // nsIStyleRuleProcessor
  virtual void RulesMatching(ElementRuleProcessorData* aData) override;
  virtual void RulesMatching(PseudoElementRuleProcessorData* aData) override;
  virtual void RulesMatching(AnonBoxRuleProcessorData* aData) override;
#ifdef MOZ_XUL
  virtual void RulesMatching(XULTreeRuleProcessorData* aData) override;
#endif
  virtual nsRestyleHint HasStateDependentStyle(StateRuleProcessorData* aData) override;
  virtual nsRestyleHint HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData) override;
  virtual bool HasDocumentStateDependentStyle(StateRuleProcessorData* aData) override;
  virtual nsRestyleHint
    HasAttributeDependentStyle(AttributeRuleProcessorData* aData,
                               mozilla::RestyleHintData& aRestyleHintDataResult) override;
  virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) override;
  virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf)
    const MOZ_MUST_OVERRIDE override;
  virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
    const MOZ_MUST_OVERRIDE override;

  // Variants of RulesMatching method above that is specific to this
  // rule processor.
  void ElementRulesMatching(nsPresContext* aPresContext,
                            mozilla::dom::Element* aElement,
                            nsRuleWalker* aRuleWalker);
  // aPseudoElement here is the content node for the pseudo-element, not
  // its corresponding real element.
  void PseudoElementRulesMatching(mozilla::dom::Element* aPseudoElement,
                                  nsCSSPseudoElements::Type aPseudoType,
                                  nsRuleWalker* aRuleWalker);

  void CacheStyleAttr(const nsAString& aSerialized, MiscContainer* aValue);
  void EvictStyleAttr(const nsAString& aSerialized, MiscContainer* aValue);
  MiscContainer* LookupStyleAttr(const nsAString& aSerialized);

private: 
  ~nsHTMLCSSStyleSheet();

  nsHTMLCSSStyleSheet(const nsHTMLCSSStyleSheet& aCopy) = delete;
  nsHTMLCSSStyleSheet& operator=(const nsHTMLCSSStyleSheet& aCopy) = delete;

protected:
  nsDataHashtable<nsStringHashKey, MiscContainer*> mCachedStyleAttrs;
};

#endif /* !defined(nsHTMLCSSStyleSheet_h_) */