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gecko/layout/style/nsHTMLCSSStyleSheet.h

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Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
Bug 716478 - update licence to MPL 2.
2012-05-21 04:12:37 -07:00
/* 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/. */
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
/*
* style sheet and style rule processor representing style attributes
*/
#ifndef nsHTMLCSSStyleSheet_h_
#define nsHTMLCSSStyleSheet_h_
Bug 711647 - Add MOZ_DELETE to a bunch of deliberately-not-implemented methods across the tree. r=dbaron --HG-- extra : rebase_source : 507006c0f099da6851b585d2062267d285978ad7
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#include "mozilla/Attributes.h"
DeCOMify nsHTMLCSSStyleSheet. (Bug 239008) r=bzbarsky
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#include "nsIStyleSheet.h"
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
#include "nsIStyleRuleProcessor.h"
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
struct MiscContainer;
Bug 758992 - Make the classes which use the XPCOM nsISupports implementation macros final, to avoid the warning about deleting using a pointer to a base class with virtual functions and no virtual dtor (layout parts); r=roc --HG-- extra : rebase_source : 9f3da1b47dcb9d7cc950488b9b70aa682b6984de
2012-06-18 20:26:34 -07:00
class nsHTMLCSSStyleSheet MOZ_FINAL : public nsIStyleSheet,
public nsIStyleRuleProcessor {
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
public:
nsHTMLCSSStyleSheet();
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
~nsHTMLCSSStyleSheet();
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
NS_DECL_ISUPPORTS
DeCOMify nsHTMLCSSStyleSheet. (Bug 239008) r=bzbarsky
2009-12-31 07:56:33 -08:00
nsresult Init(nsIURI* aURL, nsIDocument* aDocument);
Change some nsIStyleSheet methods from returning AddRef-ed to un-AddRef-ed pointers, and some other cleanup. (Bug 239008) r=dbaron
2010-05-17 21:00:39 -07:00
void Reset(nsIURI* aURL);
DeCOMify nsHTMLCSSStyleSheet. (Bug 239008) r=bzbarsky
2009-12-31 07:56:33 -08:00
// nsIStyleSheet
Change some nsIStyleSheet methods from returning AddRef-ed to un-AddRef-ed pointers, and some other cleanup. (Bug 239008) r=dbaron
2010-05-17 21:00:39 -07:00
virtual nsIURI* GetSheetURI() const;
Bug 733186: Annotate ~1000 methods with MOZ_OVERRIDE in /layout r=dholbert r=dbaron
2012-09-14 09:10:08 -07:00
virtual nsIURI* GetBaseURI() const MOZ_OVERRIDE;
virtual void GetTitle(nsString& aTitle) const MOZ_OVERRIDE;
virtual void GetType(nsString& aType) const MOZ_OVERRIDE;
virtual bool HasRules() const MOZ_OVERRIDE;
virtual bool IsApplicable() const MOZ_OVERRIDE;
virtual void SetEnabled(bool aEnabled) MOZ_OVERRIDE;
virtual bool IsComplete() const MOZ_OVERRIDE;
virtual void SetComplete() MOZ_OVERRIDE;
virtual nsIStyleSheet* GetParentSheet() const MOZ_OVERRIDE; // will be null
virtual nsIDocument* GetOwningDocument() const MOZ_OVERRIDE;
virtual void SetOwningDocument(nsIDocument* aDocument) MOZ_OVERRIDE;
DeCOMify nsHTMLCSSStyleSheet. (Bug 239008) r=bzbarsky
2009-12-31 07:56:33 -08:00
#ifdef DEBUG
Bug 733186: Annotate ~1000 methods with MOZ_OVERRIDE in /layout r=dholbert r=dbaron
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virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
DeCOMify nsHTMLCSSStyleSheet. (Bug 239008) r=bzbarsky
2009-12-31 07:56:33 -08:00
#endif
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
DeCOMify nsHTMLCSSStyleSheet. (Bug 239008) r=bzbarsky
2009-12-31 07:56:33 -08:00
// nsIStyleRuleProcessor
Bug 733186: Annotate ~1000 methods with MOZ_OVERRIDE in /layout r=dholbert r=dbaron
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virtual void RulesMatching(ElementRuleProcessorData* aData) MOZ_OVERRIDE;
virtual void RulesMatching(PseudoElementRuleProcessorData* aData) MOZ_OVERRIDE;
virtual void RulesMatching(AnonBoxRuleProcessorData* aData) MOZ_OVERRIDE;
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
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#ifdef MOZ_XUL
Bug 733186: Annotate ~1000 methods with MOZ_OVERRIDE in /layout r=dholbert r=dbaron
2012-09-14 09:10:08 -07:00
virtual void RulesMatching(XULTreeRuleProcessorData* aData) MOZ_OVERRIDE;
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
#endif
Bug 733186: Annotate ~1000 methods with MOZ_OVERRIDE in /layout r=dholbert r=dbaron
2012-09-14 09:10:08 -07:00
virtual nsRestyleHint HasStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
virtual bool HasDocumentStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
Bug 494117 preliminary refactor: Search-and-replace 'ReStyle' with 'Restyle' throughout layout. r=roc
2010-03-31 17:43:32 -07:00
virtual nsRestyleHint
Bug 733186: Annotate ~1000 methods with MOZ_OVERRIDE in /layout r=dholbert r=dbaron
2012-09-14 09:10:08 -07:00
HasAttributeDependentStyle(AttributeRuleProcessorData* aData) MOZ_OVERRIDE;
virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) MOZ_OVERRIDE;
Bug 705987 - Use mallocSizeOf in the layout memory reporters. r=khuey,bzbarsky
2011-12-08 21:01:52 -08:00
virtual NS_MUST_OVERRIDE size_t
SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const MOZ_OVERRIDE;
virtual NS_MUST_OVERRIDE size_t
SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const MOZ_OVERRIDE;
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
void CacheStyleAttr(const nsAString& aSerialized, MiscContainer* aValue);
void EvictStyleAttr(const nsAString& aSerialized, MiscContainer* aValue);
MiscContainer* LookupStyleAttr(const nsAString& aSerialized);
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
private:
Bug 711647 - Add MOZ_DELETE to a bunch of deliberately-not-implemented methods across the tree. r=dbaron --HG-- extra : rebase_source : 507006c0f099da6851b585d2062267d285978ad7
2011-12-16 11:42:07 -08:00
nsHTMLCSSStyleSheet(const nsHTMLCSSStyleSheet& aCopy) MOZ_DELETE;
nsHTMLCSSStyleSheet& operator=(const nsHTMLCSSStyleSheet& aCopy) MOZ_DELETE;
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
protected:
Change some nsIStyleSheet methods from returning AddRef-ed to un-AddRef-ed pointers, and some other cleanup. (Bug 239008) r=dbaron
2010-05-17 21:00:39 -07:00
nsCOMPtr<nsIURI> mURL;
nsIDocument* mDocument;
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsDataHashtable<nsStringHashKey, MiscContainer*> mCachedStyleAttrs;
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
};
Bug 806279 - CC macros refactoring: part 3: fold the TRAVERSE_NATIVE and AMBIGUOUS cases - r=mccr8,smaug
2012-11-14 23:32:39 -08:00
inline nsISupports*
ToSupports(nsHTMLCSSStyleSheet* aPointer)
{
return static_cast<nsIStyleSheet*>(aPointer);
}
Move class definition of nsHTMLCSSStyleSheet into its own header. (Bug 239008) r=bzbarsky
2009-12-31 07:56:32 -08:00
#endif /* !defined(nsHTMLCSSStyleSheet_h_) */
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