gecko/layout/style/GroupRule.h
Boris Zbarsky 0120d2ee48 Bug 795221 part 3. Implement cycle collection for GroupRule objects. r=smaug,dbaron
--HG--
rename : content/html/content/crashtests/795221-1.html => content/html/content/crashtests/795221-2.html
2012-10-07 22:39:09 -04:00

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2.8 KiB
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/* -*- 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/. */
/*
* internal interface representing CSS style rules that contain other
* rules, such as @media rules
*/
#ifndef mozilla_css_GroupRule_h__
#define mozilla_css_GroupRule_h__
#include "mozilla/css/Rule.h"
#include "nsCOMArray.h"
#include "nsAutoPtr.h"
#include "nsCycleCollectionParticipant.h"
class nsPresContext;
class nsMediaQueryResultCacheKey;
namespace mozilla {
namespace css {
class GroupRuleRuleList;
// inherits from Rule so it can be shared between
// MediaRule and DocumentRule
class GroupRule : public Rule
{
protected:
GroupRule();
GroupRule(const GroupRule& aCopy);
virtual ~GroupRule();
public:
NS_DECL_CYCLE_COLLECTION_CLASS(GroupRule)
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
// implement part of nsIStyleRule and Rule
DECL_STYLE_RULE_INHERIT_NO_DOMRULE
virtual void SetStyleSheet(nsCSSStyleSheet* aSheet);
// to help implement nsIStyleRule
#ifdef DEBUG
virtual void List(FILE* out = stdout, int32_t aIndent = 0) const;
#endif
public:
void AppendStyleRule(Rule* aRule);
int32_t StyleRuleCount() const { return mRules.Count(); }
Rule* GetStyleRuleAt(int32_t aIndex) const;
typedef nsCOMArray<Rule>::nsCOMArrayEnumFunc RuleEnumFunc;
bool EnumerateRulesForwards(RuleEnumFunc aFunc, void * aData) const;
/*
* The next three methods should never be called unless you have first
* called WillDirty() on the parent stylesheet. After they are
* called, DidDirty() needs to be called on the sheet.
*/
nsresult DeleteStyleRuleAt(uint32_t aIndex);
nsresult InsertStyleRulesAt(uint32_t aIndex,
nsCOMArray<Rule>& aRules);
nsresult ReplaceStyleRule(Rule *aOld, Rule *aNew);
virtual bool UseForPresentation(nsPresContext* aPresContext,
nsMediaQueryResultCacheKey& aKey) = 0;
NS_MUST_OVERRIDE size_t // non-virtual -- it is only called by subclasses
SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const;
virtual size_t
SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const = 0;
protected:
// to help implement nsIDOMCSSRule
nsresult AppendRulesToCssText(nsAString& aCssText);
// to implement common methods on nsIDOMCSSMediaRule and
// nsIDOMCSSMozDocumentRule
nsresult GetCssRules(nsIDOMCSSRuleList* *aRuleList);
nsresult InsertRule(const nsAString & aRule, uint32_t aIndex,
uint32_t* _retval);
nsresult DeleteRule(uint32_t aIndex);
nsCOMArray<Rule> mRules;
nsRefPtr<GroupRuleRuleList> mRuleCollection; // lazily constructed
};
} // namespace css
} // namespace mozilla
#endif /* mozilla_css_GroupRule_h__ */