The Tor Browser: layout/style/GroupRule.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

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

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

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

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

     6 /*

     7  * internal interface representing CSS style rules that contain other

     8  * rules, such as @media rules

     9  */

    11 #ifndef mozilla_css_GroupRule_h__

    12 #define mozilla_css_GroupRule_h__

    14 #include "mozilla/Attributes.h"

    15 #include "mozilla/MemoryReporting.h"

    16 #include "mozilla/css/Rule.h"

    17 #include "nsCOMArray.h"

    18 #include "nsAutoPtr.h"

    19 #include "nsCycleCollectionParticipant.h"

    21 class nsPresContext;

    22 class nsMediaQueryResultCacheKey;

    24 namespace mozilla {

    25 namespace css {

    27 class GroupRuleRuleList;

    29 // inherits from Rule so it can be shared between

    30 // MediaRule and DocumentRule

    31 class GroupRule : public Rule

    32 {

    33 protected:

    34   GroupRule();

    35   GroupRule(const GroupRule& aCopy);

    36   virtual ~GroupRule();

    37 public:

    39   NS_DECL_CYCLE_COLLECTION_CLASS(GroupRule)

    40   NS_DECL_CYCLE_COLLECTING_ISUPPORTS

    42   // implement part of nsIStyleRule and Rule

    43   DECL_STYLE_RULE_INHERIT_NO_DOMRULE

    44   virtual void SetStyleSheet(nsCSSStyleSheet* aSheet);

    46   // to help implement nsIStyleRule

    47 #ifdef DEBUG

    48   virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;

    49 #endif

    51 public:

    52   void AppendStyleRule(Rule* aRule);

    54   int32_t StyleRuleCount() const { return mRules.Count(); }

    55   Rule* GetStyleRuleAt(int32_t aIndex) const;

    57   typedef nsCOMArray<Rule>::nsCOMArrayEnumFunc RuleEnumFunc;

    58   bool EnumerateRulesForwards(RuleEnumFunc aFunc, void * aData) const;

    60   /*

    61    * The next three methods should never be called unless you have first

    62    * called WillDirty() on the parent stylesheet.  After they are

    63    * called, DidDirty() needs to be called on the sheet.

    64    */

    65   nsresult DeleteStyleRuleAt(uint32_t aIndex);

    66   nsresult InsertStyleRuleAt(uint32_t aIndex, Rule* aRule);

    67   nsresult ReplaceStyleRule(Rule *aOld, Rule *aNew);

    69   virtual bool UseForPresentation(nsPresContext* aPresContext,

    70                                     nsMediaQueryResultCacheKey& aKey) = 0;

    72   // non-virtual -- it is only called by subclasses

    73   size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;

    74   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const = 0;

    76   static bool

    77   CloneRuleInto(Rule* aRule, void* aArray)

    78   {

    79     nsRefPtr<Rule> clone = aRule->Clone();

    80     static_cast<nsCOMArray<Rule>*>(aArray)->AppendObject(clone);

    81     return true;

    82   }

    84 protected:

    85   // to help implement nsIDOMCSSRule

    86   void AppendRulesToCssText(nsAString& aCssText);

    88   // to implement common methods on nsIDOMCSSMediaRule and

    89   // nsIDOMCSSMozDocumentRule

    90   nsresult GetCssRules(nsIDOMCSSRuleList* *aRuleList);

    91   nsresult InsertRule(const nsAString & aRule, uint32_t aIndex,

    92                       uint32_t* _retval);

    93   nsresult DeleteRule(uint32_t aIndex);

    95   nsCOMArray<Rule> mRules;

    96   nsRefPtr<GroupRuleRuleList> mRuleCollection; // lazily constructed

    97 };

    99 } // namespace css

   100 } // namespace mozilla

   102 #endif /* mozilla_css_GroupRule_h__ */

The Tor Browser / file revision

layout/style/GroupRule.h@97036ab72558

layout/style/GroupRule.h