зеркало из https://github.com/mozilla/gecko-dev.git
949 строки
32 KiB
C++
949 строки
32 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsCOMPtr.h"
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#include "nsIStyleSet.h"
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#include "nsIStyleSheet.h"
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#include "nsIStyleRule.h"
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#include "nsIStyleContext.h"
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#include "nsISupportsArray.h"
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#include "nsIFrame.h"
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//#include "nsHashtable.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIStyleFrameConstruction.h"
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#include "nsLayoutAtoms.h"
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static NS_DEFINE_IID(kIStyleSetIID, NS_ISTYLE_SET_IID);
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static NS_DEFINE_IID(kIStyleFrameConstructionIID, NS_ISTYLE_FRAME_CONSTRUCTION_IID);
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class StyleSetImpl : public nsIStyleSet {
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public:
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StyleSetImpl();
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NS_DECL_ISUPPORTS
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virtual void AppendOverrideStyleSheet(nsIStyleSheet* aSheet);
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virtual void InsertOverrideStyleSheetAfter(nsIStyleSheet* aSheet,
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nsIStyleSheet* aAfterSheet);
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virtual void InsertOverrideStyleSheetBefore(nsIStyleSheet* aSheet,
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nsIStyleSheet* aBeforeSheet);
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virtual void RemoveOverrideStyleSheet(nsIStyleSheet* aSheet);
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virtual PRInt32 GetNumberOfOverrideStyleSheets();
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virtual nsIStyleSheet* GetOverrideStyleSheetAt(PRInt32 aIndex);
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virtual void AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument);
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virtual void RemoveDocStyleSheet(nsIStyleSheet* aSheet);
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virtual PRInt32 GetNumberOfDocStyleSheets();
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virtual nsIStyleSheet* GetDocStyleSheetAt(PRInt32 aIndex);
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virtual void AppendBackstopStyleSheet(nsIStyleSheet* aSheet);
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virtual void InsertBackstopStyleSheetAfter(nsIStyleSheet* aSheet,
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nsIStyleSheet* aAfterSheet);
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virtual void InsertBackstopStyleSheetBefore(nsIStyleSheet* aSheet,
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nsIStyleSheet* aBeforeSheet);
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virtual void RemoveBackstopStyleSheet(nsIStyleSheet* aSheet);
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virtual PRInt32 GetNumberOfBackstopStyleSheets();
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virtual nsIStyleSheet* GetBackstopStyleSheetAt(PRInt32 aIndex);
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virtual nsIStyleContext* ResolveStyleFor(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique = PR_FALSE);
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virtual nsIStyleContext* ResolvePseudoStyleFor(nsIPresContext* aPresContext,
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nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique = PR_FALSE);
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virtual nsIStyleContext* ProbePseudoStyleFor(nsIPresContext* aPresContext,
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nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique = PR_FALSE);
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NS_IMETHOD HasStateDependentStyle(nsIPresContext* aPresContext,
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nsIContent* aContent);
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NS_IMETHOD ConstructRootFrame(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame*& aFrameSubTree);
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NS_IMETHOD ReconstructDocElementHierarchy(nsIPresContext* aPresContext);
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NS_IMETHOD ContentAppended(nsIPresContext* aPresContext,
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nsIContent* aContainer,
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PRInt32 aNewIndexInContainer);
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NS_IMETHOD ContentInserted(nsIPresContext* aPresContext,
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nsIContent* aContainer,
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nsIContent* aChild,
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PRInt32 aIndexInContainer);
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NS_IMETHOD ContentReplaced(nsIPresContext* aPresContext,
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nsIContent* aContainer,
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nsIContent* aOldChild,
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nsIContent* aNewChild,
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PRInt32 aIndexInContainer);
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NS_IMETHOD ContentRemoved(nsIPresContext* aPresContext,
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nsIContent* aContainer,
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nsIContent* aChild,
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PRInt32 aIndexInContainer);
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NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsISupports* aSubContent);
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NS_IMETHOD ContentStatesChanged(nsIPresContext* aPresContext,
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nsIContent* aContent1,
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nsIContent* aContent2);
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NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsIAtom* aAttribute,
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PRInt32 aHint); // See nsStyleConsts fot hint values
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// xxx style rules enumeration
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// Style change notifications
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NS_IMETHOD StyleRuleChanged(nsIPresContext* aPresContext,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule,
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PRInt32 aHint); // See nsStyleConsts fot hint values
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NS_IMETHOD StyleRuleAdded(nsIPresContext* aPresContext,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule);
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NS_IMETHOD StyleRuleRemoved(nsIPresContext* aPresContext,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule);
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// Notification that we were unable to render a replaced element.
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NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
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nsIFrame* aFrame);
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// Request to create a continuing frame
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NS_IMETHOD CreateContinuingFrame(nsIPresContext* aPresContext,
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nsIFrame* aFrame,
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nsIFrame* aParentFrame,
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nsIFrame** aContinuingFrame);
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// Request to find the primary frame associated with a given content object.
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// This is typically called by the pres shell when there is no mapping in
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// the pres shell hash table
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NS_IMETHOD FindPrimaryFrameFor(nsIPresContext* aPresContext,
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nsIFrameManager* aFrameManager,
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nsIContent* aContent,
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nsIFrame** aFrame);
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virtual void List(FILE* out = stdout, PRInt32 aIndent = 0);
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private:
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// These are not supported and are not implemented!
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StyleSetImpl(const StyleSetImpl& aCopy);
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StyleSetImpl& operator=(const StyleSetImpl& aCopy);
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protected:
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virtual ~StyleSetImpl();
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PRBool EnsureArray(nsISupportsArray** aArray);
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nsIStyleContext* GetContext(nsIPresContext* aPresContext, nsIStyleContext* aParentContext,
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nsIAtom* aPseudoTag, nsISupportsArray* aRules, PRBool aForceUnique,
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PRBool& aUsedRules);
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void List(FILE* out, PRInt32 aIndent, nsISupportsArray* aSheets);
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void ListContexts(nsIStyleContext* aRootContext, FILE* out, PRInt32 aIndent);
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nsISupportsArray* mOverrideSheets;
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nsISupportsArray* mDocSheets;
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nsISupportsArray* mBackstopSheets;
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nsISupportsArray* mRecycler;
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nsIStyleFrameConstruction* mFrameConstructor;
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};
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StyleSetImpl::StyleSetImpl()
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: mOverrideSheets(nsnull),
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mDocSheets(nsnull),
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mBackstopSheets(nsnull),
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mRecycler(nsnull),
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mFrameConstructor(nsnull)
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{
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NS_INIT_REFCNT();
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}
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StyleSetImpl::~StyleSetImpl()
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{
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NS_IF_RELEASE(mOverrideSheets);
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NS_IF_RELEASE(mDocSheets);
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NS_IF_RELEASE(mBackstopSheets);
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NS_IF_RELEASE(mFrameConstructor);
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NS_IF_RELEASE(mRecycler);
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}
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NS_IMPL_ISUPPORTS(StyleSetImpl, kIStyleSetIID)
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PRBool StyleSetImpl::EnsureArray(nsISupportsArray** aArray)
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{
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if (nsnull == *aArray) {
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if (NS_OK != NS_NewISupportsArray(aArray)) {
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return PR_FALSE;
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}
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}
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return PR_TRUE;
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}
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// ----- Override sheets
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void StyleSetImpl::AppendOverrideStyleSheet(nsIStyleSheet* aSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (EnsureArray(&mOverrideSheets)) {
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mOverrideSheets->RemoveElement(aSheet);
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mOverrideSheets->AppendElement(aSheet);
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}
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}
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void StyleSetImpl::InsertOverrideStyleSheetAfter(nsIStyleSheet* aSheet,
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nsIStyleSheet* aAfterSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (EnsureArray(&mOverrideSheets)) {
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mOverrideSheets->RemoveElement(aSheet);
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PRInt32 index = mOverrideSheets->IndexOf(aAfterSheet);
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mOverrideSheets->InsertElementAt(aSheet, ++index);
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}
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}
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void StyleSetImpl::InsertOverrideStyleSheetBefore(nsIStyleSheet* aSheet,
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nsIStyleSheet* aBeforeSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (EnsureArray(&mOverrideSheets)) {
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mOverrideSheets->RemoveElement(aSheet);
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PRInt32 index = mOverrideSheets->IndexOf(aBeforeSheet);
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mOverrideSheets->InsertElementAt(aSheet, ((-1 < index) ? index : 0));
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}
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}
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void StyleSetImpl::RemoveOverrideStyleSheet(nsIStyleSheet* aSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (nsnull != mOverrideSheets) {
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mOverrideSheets->RemoveElement(aSheet);
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}
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}
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PRInt32 StyleSetImpl::GetNumberOfOverrideStyleSheets()
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{
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if (nsnull != mOverrideSheets) {
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PRUint32 cnt;
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nsresult rv = mOverrideSheets->Count(&cnt);
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if (NS_FAILED(rv)) return 0; // XXX error?
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return cnt;
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}
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return 0;
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}
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nsIStyleSheet* StyleSetImpl::GetOverrideStyleSheetAt(PRInt32 aIndex)
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{
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nsIStyleSheet* sheet = nsnull;
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if (nsnull != mOverrideSheets) {
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sheet = (nsIStyleSheet*)mOverrideSheets->ElementAt(aIndex);
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}
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return sheet;
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}
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// -------- Doc Sheets
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void StyleSetImpl::AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument)
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{
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NS_PRECONDITION((nsnull != aSheet) && (nsnull != aDocument), "null arg");
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if (EnsureArray(&mDocSheets)) {
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mDocSheets->RemoveElement(aSheet);
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// lowest index last
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PRInt32 newDocIndex = aDocument->GetIndexOfStyleSheet(aSheet);
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PRUint32 count;
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nsresult rv = mDocSheets->Count(&count);
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if (NS_FAILED(rv)) return; // XXX error?
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PRUint32 index;
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for (index = 0; index < count; index++) {
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nsIStyleSheet* sheet = (nsIStyleSheet*)mDocSheets->ElementAt(index);
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PRInt32 sheetDocIndex = aDocument->GetIndexOfStyleSheet(sheet);
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if (sheetDocIndex < newDocIndex) {
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mDocSheets->InsertElementAt(aSheet, index);
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index = count; // break loop
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}
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NS_RELEASE(sheet);
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}
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PRUint32 cnt;
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rv = mDocSheets->Count(&cnt);
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if (NS_FAILED(rv)) return; // XXX error?
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if (cnt == count) { // didn't insert it
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mDocSheets->AppendElement(aSheet);
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}
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if (nsnull == mFrameConstructor) {
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aSheet->QueryInterface(kIStyleFrameConstructionIID, (void **)&mFrameConstructor);
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}
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}
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}
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void StyleSetImpl::RemoveDocStyleSheet(nsIStyleSheet* aSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (nsnull != mDocSheets) {
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mDocSheets->RemoveElement(aSheet);
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}
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}
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PRInt32 StyleSetImpl::GetNumberOfDocStyleSheets()
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{
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if (nsnull != mDocSheets) {
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PRUint32 cnt;
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nsresult rv = mDocSheets->Count(&cnt);
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if (NS_FAILED(rv)) return 0; // XXX error?
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return cnt;
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}
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return 0;
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}
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nsIStyleSheet* StyleSetImpl::GetDocStyleSheetAt(PRInt32 aIndex)
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{
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nsIStyleSheet* sheet = nsnull;
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if (nsnull != mDocSheets) {
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sheet = (nsIStyleSheet*)mDocSheets->ElementAt(aIndex);
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}
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return sheet;
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}
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// ------ backstop sheets
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void StyleSetImpl::AppendBackstopStyleSheet(nsIStyleSheet* aSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (EnsureArray(&mBackstopSheets)) {
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mBackstopSheets->RemoveElement(aSheet);
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mBackstopSheets->AppendElement(aSheet);
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}
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}
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void StyleSetImpl::InsertBackstopStyleSheetAfter(nsIStyleSheet* aSheet,
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nsIStyleSheet* aAfterSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (EnsureArray(&mBackstopSheets)) {
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mBackstopSheets->RemoveElement(aSheet);
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PRInt32 index = mBackstopSheets->IndexOf(aAfterSheet);
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mBackstopSheets->InsertElementAt(aSheet, ++index);
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}
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}
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void StyleSetImpl::InsertBackstopStyleSheetBefore(nsIStyleSheet* aSheet,
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nsIStyleSheet* aBeforeSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (EnsureArray(&mBackstopSheets)) {
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mBackstopSheets->RemoveElement(aSheet);
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PRInt32 index = mBackstopSheets->IndexOf(aBeforeSheet);
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mBackstopSheets->InsertElementAt(aSheet, ((-1 < index) ? index : 0));
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}
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}
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void StyleSetImpl::RemoveBackstopStyleSheet(nsIStyleSheet* aSheet)
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{
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NS_PRECONDITION(nsnull != aSheet, "null arg");
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if (nsnull != mBackstopSheets) {
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mBackstopSheets->RemoveElement(aSheet);
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}
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}
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PRInt32 StyleSetImpl::GetNumberOfBackstopStyleSheets()
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{
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if (nsnull != mBackstopSheets) {
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PRUint32 cnt;
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nsresult rv = mBackstopSheets->Count(&cnt);
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if (NS_FAILED(rv)) return 0; // XXX error?
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return cnt;
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}
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return 0;
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}
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nsIStyleSheet* StyleSetImpl::GetBackstopStyleSheetAt(PRInt32 aIndex)
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{
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nsIStyleSheet* sheet = nsnull;
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if (nsnull != mBackstopSheets) {
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sheet = (nsIStyleSheet*)mBackstopSheets->ElementAt(aIndex);
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}
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return sheet;
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}
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struct RulesMatchingData {
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RulesMatchingData(nsIPresContext* aPresContext,
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nsIAtom* aMedium,
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nsIContent* aContent,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults)
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: mPresContext(aPresContext),
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mMedium(aMedium),
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mContent(aContent),
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mParentContext(aParentContext),
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mResults(aResults),
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mCount(0)
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{
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}
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nsIPresContext* mPresContext;
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nsIAtom* mMedium;
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nsIContent* mContent;
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nsIStyleContext* mParentContext;
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nsISupportsArray* mResults;
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PRInt32 mCount;
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};
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static PRBool
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EnumRulesMatching(nsISupports* aSheet, void* aData)
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{
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nsIStyleSheet* sheet = (nsIStyleSheet*)aSheet;
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RulesMatchingData* data = (RulesMatchingData*)aData;
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if (NS_OK == sheet->UseForMedium(data->mMedium)) {
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data->mCount += sheet->RulesMatching(data->mPresContext, data->mContent,
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data->mParentContext, data->mResults);
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}
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return PR_TRUE;
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}
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nsIStyleContext* StyleSetImpl::GetContext(nsIPresContext* aPresContext,
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nsIStyleContext* aParentContext, nsIAtom* aPseudoTag,
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nsISupportsArray* aRules,
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PRBool aForceUnique, PRBool& aUsedRules)
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{
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nsIStyleContext* result = nsnull;
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aUsedRules = PR_FALSE;
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if ((PR_FALSE == aForceUnique) &&
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(nsnull != aParentContext) && (nsnull == aRules) &&
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(0 == aParentContext->GetStyleRuleCount())) {
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nsIAtom* parentTag = nsnull;
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aParentContext->GetPseudoType(parentTag);
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if (parentTag == aPseudoTag) {
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// this and parent are empty, and compatible
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result = aParentContext;
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NS_ADDREF(result); // add ref for the caller
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}
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NS_IF_RELEASE(parentTag);
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//fprintf(stdout, ".");
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}
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if (nsnull == result) {
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if ((PR_FALSE == aForceUnique) && (nsnull != aParentContext)) {
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aParentContext->FindChildWithRules(aPseudoTag, aRules, result);
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}
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if (nsnull == result) {
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if (NS_OK == NS_NewStyleContext(&result, aParentContext, aPseudoTag, aRules, aPresContext)) {
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if (PR_TRUE == aForceUnique) {
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result->ForceUnique();
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}
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aUsedRules = PRBool(nsnull != aRules);
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}
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//fprintf(stdout, "+");
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}
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else {
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//fprintf(stdout, "-");
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}
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}
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return result;
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}
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// XXX for now only works for strength 0 & 1
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static void SortRulesByStrength(nsISupportsArray* aRules, PRInt32& aBackstopRuleCount)
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{
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PRUint32 cnt;
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nsresult rv = aRules->Count(&cnt);
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if (NS_FAILED(rv)) return; // XXX error?
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PRInt32 count = (PRInt32)cnt;
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if (1 < count) {
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PRInt32 index;
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PRInt32 strength;
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for (index = 0; index < count; ) {
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nsIStyleRule* rule = (nsIStyleRule*)aRules->ElementAt(index);
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rule->GetStrength(strength);
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if (0 < strength) {
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aRules->RemoveElementAt(index);
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aRules->AppendElement(rule);
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count--;
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if (index < aBackstopRuleCount) {
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aBackstopRuleCount--;
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}
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}
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else {
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index++;
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|
}
|
|
NS_RELEASE(rule);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef NS_DEBUG
|
|
#define NS_ASSERT_REFCOUNT(ptr,cnt,msg) { \
|
|
nsrefcnt count = ptr->AddRef(); \
|
|
ptr->Release(); \
|
|
NS_ASSERTION(--count == cnt, msg); \
|
|
}
|
|
#else
|
|
#define NS_ASSERT_REFCOUNT(ptr,cnt,msg) {}
|
|
#endif
|
|
|
|
nsIStyleContext* StyleSetImpl::ResolveStyleFor(nsIPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIStyleContext* aParentContext,
|
|
PRBool aForceUnique)
|
|
{
|
|
nsIStyleContext* result = nsnull;
|
|
|
|
NS_ASSERTION(aContent, "must have content");
|
|
NS_ASSERTION(aPresContext, "must have pres context");
|
|
|
|
if (aContent && aPresContext) {
|
|
nsISupportsArray* rules = mRecycler;
|
|
mRecycler = nsnull;
|
|
if (nsnull == rules) {
|
|
NS_NewISupportsArray(&rules);
|
|
}
|
|
|
|
if (nsnull != rules) {
|
|
nsIAtom* medium = nsnull;
|
|
aPresContext->GetMedium(&medium);
|
|
RulesMatchingData data(aPresContext, medium, aContent, aParentContext, rules);
|
|
if (mBackstopSheets) {
|
|
mBackstopSheets->EnumerateBackwards(EnumRulesMatching, &data);
|
|
}
|
|
PRInt32 backstopRules = data.mCount;
|
|
if (mDocSheets) {
|
|
mDocSheets->EnumerateBackwards(EnumRulesMatching, &data);
|
|
}
|
|
if (mOverrideSheets) {
|
|
mOverrideSheets->EnumerateBackwards(EnumRulesMatching, &data);
|
|
}
|
|
|
|
PRBool usedRules = PR_FALSE;
|
|
if (0 < data.mCount) {
|
|
SortRulesByStrength(rules, backstopRules);
|
|
result = GetContext(aPresContext, aParentContext, nsnull, rules, aForceUnique, usedRules);
|
|
if (usedRules) {
|
|
NS_ASSERT_REFCOUNT(rules, 2, "rules array was used elsewhere");
|
|
NS_RELEASE(rules);
|
|
}
|
|
else {
|
|
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
|
|
rules->Clear();
|
|
mRecycler = rules;
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
|
|
mRecycler = rules;
|
|
result = GetContext(aPresContext, aParentContext, nsnull, nsnull, aForceUnique, usedRules);
|
|
}
|
|
NS_RELEASE(medium);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
struct PseudoRulesMatchingData {
|
|
PseudoRulesMatchingData(nsIPresContext* aPresContext,
|
|
nsIAtom* aMedium,
|
|
nsIContent* aParentContent,
|
|
nsIAtom* aPseudoTag,
|
|
nsIStyleContext* aParentContext,
|
|
nsISupportsArray* aResults)
|
|
: mPresContext(aPresContext),
|
|
mMedium(aMedium),
|
|
mParentContent(aParentContent),
|
|
mPseudoTag(aPseudoTag),
|
|
mParentContext(aParentContext),
|
|
mResults(aResults),
|
|
mCount(0)
|
|
{
|
|
}
|
|
nsIPresContext* mPresContext;
|
|
nsIAtom* mMedium;
|
|
nsIContent* mParentContent;
|
|
nsIAtom* mPseudoTag;
|
|
nsIStyleContext* mParentContext;
|
|
nsISupportsArray* mResults;
|
|
PRInt32 mCount;
|
|
|
|
};
|
|
|
|
static PRBool
|
|
EnumPseudoRulesMatching(nsISupports* aSheet, void* aData)
|
|
{
|
|
nsIStyleSheet* sheet = (nsIStyleSheet*)aSheet;
|
|
PseudoRulesMatchingData* data = (PseudoRulesMatchingData*)aData;
|
|
|
|
if (NS_OK == sheet->UseForMedium(data->mMedium)) {
|
|
data->mCount += sheet->RulesMatching(data->mPresContext, data->mParentContent,
|
|
data->mPseudoTag,
|
|
data->mParentContext, data->mResults);
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsIStyleContext* StyleSetImpl::ResolvePseudoStyleFor(nsIPresContext* aPresContext,
|
|
nsIContent* aParentContent,
|
|
nsIAtom* aPseudoTag,
|
|
nsIStyleContext* aParentContext,
|
|
PRBool aForceUnique)
|
|
{
|
|
nsIStyleContext* result = nsnull;
|
|
|
|
NS_ASSERTION(aPseudoTag, "must have pseudo tag");
|
|
NS_ASSERTION(aPresContext, "must have pres context");
|
|
|
|
if (aPseudoTag && aPresContext) {
|
|
nsISupportsArray* rules = mRecycler;
|
|
mRecycler = nsnull;
|
|
if (nsnull == rules) {
|
|
NS_NewISupportsArray(&rules);
|
|
}
|
|
|
|
if (nsnull != rules) {
|
|
nsIAtom* medium = nsnull;
|
|
aPresContext->GetMedium(&medium);
|
|
PseudoRulesMatchingData data(aPresContext, medium, aParentContent,
|
|
aPseudoTag, aParentContext, rules);
|
|
if (mBackstopSheets) {
|
|
mBackstopSheets->EnumerateBackwards(EnumPseudoRulesMatching, &data);
|
|
}
|
|
PRInt32 backstopRules = data.mCount;
|
|
if (mDocSheets) {
|
|
mDocSheets->EnumerateBackwards(EnumPseudoRulesMatching, &data);
|
|
}
|
|
if (mOverrideSheets) {
|
|
mOverrideSheets->EnumerateBackwards(EnumPseudoRulesMatching, &data);
|
|
}
|
|
|
|
PRBool usedRules = PR_FALSE;
|
|
if (0 < data.mCount) {
|
|
SortRulesByStrength(rules, backstopRules);
|
|
result = GetContext(aPresContext, aParentContext, aPseudoTag, rules, aForceUnique, usedRules);
|
|
if (usedRules) {
|
|
NS_ASSERT_REFCOUNT(rules, 2, "rules array was used elsewhere");
|
|
NS_RELEASE(rules);
|
|
}
|
|
else {
|
|
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
|
|
rules->Clear();
|
|
mRecycler = rules;
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
|
|
mRecycler = rules;
|
|
result = GetContext(aPresContext, aParentContext, aPseudoTag, nsnull, aForceUnique, usedRules);
|
|
}
|
|
NS_IF_RELEASE(medium);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
nsIStyleContext* StyleSetImpl::ProbePseudoStyleFor(nsIPresContext* aPresContext,
|
|
nsIContent* aParentContent,
|
|
nsIAtom* aPseudoTag,
|
|
nsIStyleContext* aParentContext,
|
|
PRBool aForceUnique)
|
|
{
|
|
nsIStyleContext* result = nsnull;
|
|
|
|
NS_ASSERTION(aPseudoTag, "must have pseudo tag");
|
|
NS_ASSERTION(aPresContext, "must have pres context");
|
|
|
|
if (aPseudoTag && aPresContext) {
|
|
nsISupportsArray* rules = mRecycler;
|
|
mRecycler = nsnull;
|
|
if (nsnull == rules) {
|
|
NS_NewISupportsArray(&rules);
|
|
}
|
|
|
|
if (nsnull != rules) {
|
|
nsIAtom* medium = nsnull;
|
|
aPresContext->GetMedium(&medium);
|
|
PseudoRulesMatchingData data(aPresContext, medium, aParentContent,
|
|
aPseudoTag, aParentContext, rules);
|
|
if (mBackstopSheets) {
|
|
mBackstopSheets->EnumerateBackwards(EnumPseudoRulesMatching, &data);
|
|
}
|
|
PRInt32 backstopRules = data.mCount;
|
|
if (mDocSheets) {
|
|
mDocSheets->EnumerateBackwards(EnumPseudoRulesMatching, &data);
|
|
}
|
|
if (mOverrideSheets) {
|
|
mOverrideSheets->EnumerateBackwards(EnumPseudoRulesMatching, &data);
|
|
}
|
|
|
|
PRBool usedRules = PR_FALSE;
|
|
if (0 < data.mCount) {
|
|
SortRulesByStrength(rules, backstopRules);
|
|
result = GetContext(aPresContext, aParentContext, aPseudoTag, rules, aForceUnique, usedRules);
|
|
if (usedRules) {
|
|
NS_ASSERT_REFCOUNT(rules, 2, "rules array was used elsewhere");
|
|
NS_RELEASE(rules);
|
|
}
|
|
else {
|
|
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
|
|
rules->Clear();
|
|
mRecycler = rules;
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
|
|
mRecycler = rules;
|
|
}
|
|
NS_IF_RELEASE(medium);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
struct StatefulData {
|
|
StatefulData(nsIPresContext* aPresContext, nsIContent* aContent)
|
|
: mPresContext(aPresContext),
|
|
mContent(aContent),
|
|
mStateful(PR_FALSE)
|
|
{}
|
|
nsIPresContext* mPresContext;
|
|
nsIContent* mContent;
|
|
PRBool mStateful;
|
|
};
|
|
|
|
PRBool SheetHasStatefulStyle(nsISupports* aElement, void *aData)
|
|
{
|
|
nsIStyleSheet* sheet = (nsIStyleSheet*)aElement;
|
|
StatefulData* data = (StatefulData*)aData;
|
|
if (NS_OK == sheet->HasStateDependentStyle(data->mPresContext, data->mContent)) {
|
|
data->mStateful = PR_TRUE;
|
|
return PR_FALSE; // stop iteration
|
|
}
|
|
return PR_TRUE; // continue
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::HasStateDependentStyle(nsIPresContext* aPresContext,
|
|
nsIContent* aContent)
|
|
{
|
|
StatefulData data(aPresContext, aContent);
|
|
if (mBackstopSheets) {
|
|
mBackstopSheets->EnumerateForwards(SheetHasStatefulStyle, &data);
|
|
}
|
|
if (mDocSheets && (! data.mStateful)) {
|
|
mDocSheets->EnumerateForwards(SheetHasStatefulStyle, &data);
|
|
}
|
|
if (mOverrideSheets && (! data.mStateful)) {
|
|
mOverrideSheets->EnumerateForwards(SheetHasStatefulStyle, &data);
|
|
}
|
|
return ((data.mStateful) ? NS_OK : NS_COMFALSE);
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP StyleSetImpl::ConstructRootFrame(nsIPresContext* aPresContext,
|
|
nsIContent* aDocElement,
|
|
nsIFrame*& aFrameSubTree)
|
|
{
|
|
return mFrameConstructor->ConstructRootFrame(aPresContext, aDocElement,
|
|
aFrameSubTree);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::ReconstructDocElementHierarchy(nsIPresContext* aPresContext)
|
|
{
|
|
return mFrameConstructor->ReconstructDocElementHierarchy(aPresContext);
|
|
}
|
|
|
|
NS_IMETHODIMP StyleSetImpl::ContentAppended(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
PRInt32 aNewIndexInContainer)
|
|
{
|
|
return mFrameConstructor->ContentAppended(aPresContext,
|
|
aContainer, aNewIndexInContainer);
|
|
}
|
|
|
|
NS_IMETHODIMP StyleSetImpl::ContentInserted(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
nsIContent* aChild,
|
|
PRInt32 aIndexInContainer)
|
|
{
|
|
return mFrameConstructor->ContentInserted(aPresContext, aContainer,
|
|
aChild, aIndexInContainer);
|
|
}
|
|
|
|
NS_IMETHODIMP StyleSetImpl::ContentReplaced(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
nsIContent* aOldChild,
|
|
nsIContent* aNewChild,
|
|
PRInt32 aIndexInContainer)
|
|
{
|
|
return mFrameConstructor->ContentReplaced(aPresContext, aContainer,
|
|
aOldChild, aNewChild, aIndexInContainer);
|
|
}
|
|
|
|
NS_IMETHODIMP StyleSetImpl::ContentRemoved(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
nsIContent* aChild,
|
|
PRInt32 aIndexInContainer)
|
|
{
|
|
return mFrameConstructor->ContentRemoved(aPresContext, aContainer,
|
|
aChild, aIndexInContainer);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::ContentChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsISupports* aSubContent)
|
|
{
|
|
return mFrameConstructor->ContentChanged(aPresContext,
|
|
aContent, aSubContent);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::ContentStatesChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aContent1,
|
|
nsIContent* aContent2)
|
|
{
|
|
return mFrameConstructor->ContentStatesChanged(aPresContext, aContent1, aContent2);
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::AttributeChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aHint)
|
|
{
|
|
return mFrameConstructor->AttributeChanged(aPresContext, aContent,
|
|
aAttribute, aHint);
|
|
}
|
|
|
|
|
|
// Style change notifications
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::StyleRuleChanged(nsIPresContext* aPresContext,
|
|
nsIStyleSheet* aStyleSheet,
|
|
nsIStyleRule* aStyleRule,
|
|
PRInt32 aHint)
|
|
{
|
|
return mFrameConstructor->StyleRuleChanged(aPresContext, aStyleSheet, aStyleRule, aHint);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::StyleRuleAdded(nsIPresContext* aPresContext,
|
|
nsIStyleSheet* aStyleSheet,
|
|
nsIStyleRule* aStyleRule)
|
|
{
|
|
return mFrameConstructor->StyleRuleAdded(aPresContext, aStyleSheet, aStyleRule);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::StyleRuleRemoved(nsIPresContext* aPresContext,
|
|
nsIStyleSheet* aStyleSheet,
|
|
nsIStyleRule* aStyleRule)
|
|
{
|
|
return mFrameConstructor->StyleRuleRemoved(aPresContext, aStyleSheet, aStyleRule);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::CantRenderReplacedElement(nsIPresContext* aPresContext,
|
|
nsIFrame* aFrame)
|
|
{
|
|
return mFrameConstructor->CantRenderReplacedElement(aPresContext, aFrame);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::CreateContinuingFrame(nsIPresContext* aPresContext,
|
|
nsIFrame* aFrame,
|
|
nsIFrame* aParentFrame,
|
|
nsIFrame** aContinuingFrame)
|
|
{
|
|
return mFrameConstructor->CreateContinuingFrame(aPresContext, aFrame, aParentFrame,
|
|
aContinuingFrame);
|
|
}
|
|
|
|
// Request to find the primary frame associated with a given content object.
|
|
// This is typically called by the pres shell when there is no mapping in
|
|
// the pres shell hash table
|
|
NS_IMETHODIMP
|
|
StyleSetImpl::FindPrimaryFrameFor(nsIPresContext* aPresContext,
|
|
nsIFrameManager* aFrameManager,
|
|
nsIContent* aContent,
|
|
nsIFrame** aFrame)
|
|
{
|
|
return mFrameConstructor->FindPrimaryFrameFor(aPresContext, aFrameManager,
|
|
aContent, aFrame);
|
|
}
|
|
|
|
void StyleSetImpl::List(FILE* out, PRInt32 aIndent, nsISupportsArray* aSheets)
|
|
{
|
|
PRUint32 cnt = 0;
|
|
if (aSheets) {
|
|
nsresult rv = aSheets->Count(&cnt);
|
|
if (NS_FAILED(rv)) return; // XXX error?
|
|
}
|
|
|
|
for (PRInt32 index = 0; index < (PRInt32)cnt; index++) {
|
|
nsIStyleSheet* sheet = (nsIStyleSheet*)aSheets->ElementAt(index);
|
|
sheet->List(out, aIndent);
|
|
fputs("\n", out);
|
|
NS_RELEASE(sheet);
|
|
}
|
|
}
|
|
|
|
void StyleSetImpl::List(FILE* out, PRInt32 aIndent)
|
|
{
|
|
// List(out, aIndent, mOverrideSheets);
|
|
List(out, aIndent, mDocSheets);
|
|
// List(out, aIndent, mBackstopSheets);
|
|
}
|
|
|
|
void StyleSetImpl::ListContexts(nsIStyleContext* aRootContext, FILE* out, PRInt32 aIndent)
|
|
{
|
|
aRootContext->List(out, aIndent);
|
|
}
|
|
|
|
|
|
NS_LAYOUT nsresult
|
|
NS_NewStyleSet(nsIStyleSet** aInstancePtrResult)
|
|
{
|
|
if (aInstancePtrResult == nsnull) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
StyleSetImpl *it = new StyleSetImpl();
|
|
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return it->QueryInterface(kIStyleSetIID, (void **) aInstancePtrResult);
|
|
}
|