зеркало из https://github.com/mozilla/pjs.git
933 строки
26 KiB
C++
933 строки
26 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 "nsINameSpaceManager.h"
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#include "nsIHTMLStyleSheet.h"
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#include "nsIArena.h"
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#include "nsCRT.h"
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#include "nsIAtom.h"
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#include "nsIURL.h"
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#include "nsISupportsArray.h"
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#include "nsHashtable.h"
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#include "nsIHTMLContent.h"
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#include "nsIHTMLAttributes.h"
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#include "nsIStyleRule.h"
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#include "nsIFrame.h"
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#include "nsIStyleContext.h"
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#include "nsHTMLAtoms.h"
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#include "nsIPresContext.h"
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#include "nsILinkHandler.h"
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#include "nsIEventStateManager.h"
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#include "nsIDocument.h"
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#include "nsHTMLIIDs.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsHTMLParts.h"
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#include "nsIPresShell.h"
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#include "nsStyleConsts.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsINameSpaceManager.h"
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#include "nsLayoutAtoms.h"
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static NS_DEFINE_IID(kIHTMLStyleSheetIID, NS_IHTML_STYLE_SHEET_IID);
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static NS_DEFINE_IID(kIStyleSheetIID, NS_ISTYLE_SHEET_IID);
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static NS_DEFINE_IID(kIStyleRuleIID, NS_ISTYLE_RULE_IID);
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static NS_DEFINE_IID(kIStyleFrameConstructionIID, NS_ISTYLE_FRAME_CONSTRUCTION_IID);
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class HTMLAnchorRule : public nsIStyleRule {
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public:
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HTMLAnchorRule(nsIHTMLStyleSheet* aSheet);
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~HTMLAnchorRule();
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NS_DECL_ISUPPORTS
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NS_IMETHOD Equals(const nsIStyleRule* aRule, PRBool& aValue) const;
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NS_IMETHOD HashValue(PRUint32& aValue) const;
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NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aSheet) const;
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// Strength is an out-of-band weighting, always 0 here
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NS_IMETHOD GetStrength(PRInt32& aStrength) const;
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NS_IMETHOD MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext);
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NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
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nscolor mColor;
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nsIHTMLStyleSheet* mSheet;
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};
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HTMLAnchorRule::HTMLAnchorRule(nsIHTMLStyleSheet* aSheet)
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: mSheet(aSheet)
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{
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NS_INIT_REFCNT();
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}
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HTMLAnchorRule::~HTMLAnchorRule()
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{
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}
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NS_IMPL_ISUPPORTS(HTMLAnchorRule, kIStyleRuleIID);
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NS_IMETHODIMP
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HTMLAnchorRule::Equals(const nsIStyleRule* aRule, PRBool& aResult) const
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{
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aResult = PRBool(this == aRule);
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLAnchorRule::HashValue(PRUint32& aValue) const
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{
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aValue = (PRUint32)(mColor);
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLAnchorRule::GetStyleSheet(nsIStyleSheet*& aSheet) const
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{
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NS_IF_ADDREF(mSheet);
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aSheet = mSheet;
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return NS_OK;
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}
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// Strength is an out-of-band weighting, always 0 here
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NS_IMETHODIMP
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HTMLAnchorRule::GetStrength(PRInt32& aStrength) const
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{
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aStrength = 0;
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLAnchorRule::MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
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{
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nsStyleColor* styleColor = (nsStyleColor*)(aContext->GetMutableStyleData(eStyleStruct_Color));
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if (nsnull != styleColor) {
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styleColor->mColor = mColor;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLAnchorRule::List(FILE* out, PRInt32 aIndent) const
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{
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return NS_OK;
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}
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// -----------------------------------------------------------
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class AttributeKey: public nsHashKey
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{
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public:
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AttributeKey(nsMapAttributesFunc aMapFunc, nsIHTMLAttributes* aAttributes);
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virtual ~AttributeKey(void);
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PRBool Equals(const nsHashKey* aOther) const;
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PRUint32 HashValue(void) const;
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nsHashKey* Clone(void) const;
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private:
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AttributeKey(void);
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AttributeKey(const AttributeKey& aCopy);
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AttributeKey& operator=(const AttributeKey& aCopy);
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public:
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nsMapAttributesFunc mMapFunc;
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nsIHTMLAttributes* mAttributes;
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PRUint32 mHashSet: 1;
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PRUint32 mHashCode: 31;
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};
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AttributeKey::AttributeKey(nsMapAttributesFunc aMapFunc, nsIHTMLAttributes* aAttributes)
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: mMapFunc(aMapFunc),
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mAttributes(aAttributes)
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{
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NS_ADDREF(mAttributes);
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mHashSet = 0;
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mHashCode = 0;
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}
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AttributeKey::~AttributeKey(void)
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{
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NS_RELEASE(mAttributes);
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}
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PRBool AttributeKey::Equals(const nsHashKey* aOther) const
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{
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const AttributeKey* other = (const AttributeKey*)aOther;
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if (mMapFunc == other->mMapFunc) {
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PRBool equals;
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mAttributes->Equals(other->mAttributes, equals);
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return equals;
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}
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return PR_FALSE;
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}
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PRUint32 AttributeKey::HashValue(void) const
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{
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if (0 == mHashSet) {
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AttributeKey* self = (AttributeKey*)this; // break const
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PRUint32 hash;
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mAttributes->HashValue(hash);
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self->mHashCode = (0x7FFFFFFF & hash);
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self->mHashCode |= (0x7FFFFFFF & PRUint32(mMapFunc));
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self->mHashSet = 1;
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}
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return mHashCode;
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}
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nsHashKey* AttributeKey::Clone(void) const
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{
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AttributeKey* clown = new AttributeKey(mMapFunc, mAttributes);
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if (nsnull != clown) {
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clown->mHashSet = mHashSet;
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clown->mHashCode = mHashCode;
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}
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return clown;
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}
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// -----------------------------------------------------------
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class HTMLStyleSheetImpl : public nsIHTMLStyleSheet {
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public:
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void* operator new(size_t size);
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void* operator new(size_t size, nsIArena* aArena);
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void operator delete(void* ptr);
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HTMLStyleSheetImpl(void);
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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NS_IMETHOD_(nsrefcnt) AddRef();
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NS_IMETHOD_(nsrefcnt) Release();
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// nsIStyleSheet api
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NS_IMETHOD GetURL(nsIURL*& aURL) const;
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NS_IMETHOD GetTitle(nsString& aTitle) const;
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NS_IMETHOD GetType(nsString& aType) const;
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NS_IMETHOD GetMediumCount(PRInt32& aCount) const;
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NS_IMETHOD GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const;
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NS_IMETHOD GetEnabled(PRBool& aEnabled) const;
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NS_IMETHOD SetEnabled(PRBool aEnabled);
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// style sheet owner info
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NS_IMETHOD GetParentSheet(nsIStyleSheet*& aParent) const; // will be null
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NS_IMETHOD GetOwningDocument(nsIDocument*& aDocument) const;
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NS_IMETHOD SetOwningDocument(nsIDocument* aDocumemt);
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virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults);
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virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults);
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NS_IMETHOD Init(nsIURL* aURL, nsIDocument* aDocument);
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NS_IMETHOD Reset(nsIURL* aURL);
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NS_IMETHOD SetLinkColor(nscolor aColor);
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NS_IMETHOD SetActiveLinkColor(nscolor aColor);
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NS_IMETHOD SetVisitedLinkColor(nscolor aColor);
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// Attribute management methods, aAttributes is an in/out param
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NS_IMETHOD SetAttributesFor(nsIHTMLContent* aContent,
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nsIHTMLAttributes*& aAttributes);
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NS_IMETHOD SetAttributeFor(nsIAtom* aAttribute, const nsString& aValue,
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nsIHTMLContent* aContent,
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nsIHTMLAttributes*& aAttributes);
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NS_IMETHOD SetAttributeFor(nsIAtom* aAttribute, const nsHTMLValue& aValue,
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nsIHTMLContent* aContent,
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nsIHTMLAttributes*& aAttributes);
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NS_IMETHOD UnsetAttributeFor(nsIAtom* aAttribute, nsIHTMLContent* aContent,
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nsIHTMLAttributes*& aAttributes);
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virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
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private:
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// These are not supported and are not implemented!
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HTMLStyleSheetImpl(const HTMLStyleSheetImpl& aCopy);
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HTMLStyleSheetImpl& operator=(const HTMLStyleSheetImpl& aCopy);
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protected:
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virtual ~HTMLStyleSheetImpl();
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NS_IMETHOD EnsureSingleAttributes(nsIHTMLAttributes*& aAttributes,
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nsMapAttributesFunc aMapFunc,
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PRBool aCreate,
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nsIHTMLAttributes*& aSingleAttrs);
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NS_IMETHOD UniqueAttributes(nsIHTMLAttributes*& aSingleAttrs,
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nsMapAttributesFunc aMapFunc,
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PRInt32 aAttrCount,
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nsIHTMLAttributes*& aAttributes);
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protected:
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PRUint32 mInHeap : 1;
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PRUint32 mRefCnt : 31;
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nsIURL* mURL;
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nsIDocument* mDocument;
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HTMLAnchorRule* mLinkRule;
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HTMLAnchorRule* mVisitedRule;
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HTMLAnchorRule* mActiveRule;
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nsHashtable mAttrTable;
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nsIHTMLAttributes* mRecycledAttrs;
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};
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void* HTMLStyleSheetImpl::operator new(size_t size)
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{
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HTMLStyleSheetImpl* rv = (HTMLStyleSheetImpl*) ::operator new(size);
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#ifdef NS_DEBUG
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if (nsnull != rv) {
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nsCRT::memset(rv, 0xEE, size);
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}
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#endif
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rv->mInHeap = 1;
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return (void*) rv;
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}
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void* HTMLStyleSheetImpl::operator new(size_t size, nsIArena* aArena)
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{
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HTMLStyleSheetImpl* rv = (HTMLStyleSheetImpl*) aArena->Alloc(PRInt32(size));
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#ifdef NS_DEBUG
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if (nsnull != rv) {
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nsCRT::memset(rv, 0xEE, size);
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}
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#endif
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rv->mInHeap = 0;
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return (void*) rv;
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}
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void HTMLStyleSheetImpl::operator delete(void* ptr)
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{
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HTMLStyleSheetImpl* sheet = (HTMLStyleSheetImpl*) ptr;
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if (nsnull != sheet) {
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if (sheet->mInHeap) {
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::operator delete(ptr);
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}
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}
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}
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HTMLStyleSheetImpl::HTMLStyleSheetImpl(void)
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: nsIHTMLStyleSheet(),
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mURL(nsnull),
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mDocument(nsnull),
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mLinkRule(nsnull),
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mVisitedRule(nsnull),
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mActiveRule(nsnull),
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mRecycledAttrs(nsnull)
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{
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NS_INIT_REFCNT();
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}
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HTMLStyleSheetImpl::~HTMLStyleSheetImpl()
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{
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NS_RELEASE(mURL);
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if (nsnull != mLinkRule) {
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mLinkRule->mSheet = nsnull;
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NS_RELEASE(mLinkRule);
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}
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if (nsnull != mVisitedRule) {
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mVisitedRule->mSheet = nsnull;
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NS_RELEASE(mVisitedRule);
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}
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if (nsnull != mActiveRule) {
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mActiveRule->mSheet = nsnull;
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NS_RELEASE(mActiveRule);
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}
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NS_IF_RELEASE(mRecycledAttrs);
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}
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NS_IMPL_ADDREF(HTMLStyleSheetImpl)
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NS_IMPL_RELEASE(HTMLStyleSheetImpl)
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nsresult HTMLStyleSheetImpl::QueryInterface(const nsIID& aIID,
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void** aInstancePtrResult)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null pointer");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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if (aIID.Equals(kIHTMLStyleSheetIID)) {
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*aInstancePtrResult = (void*) ((nsIHTMLStyleSheet*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kIStyleSheetIID)) {
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*aInstancePtrResult = (void*) ((nsIStyleSheet*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kIStyleFrameConstructionIID)) {
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// XXX this breaks XPCOM rules since it isn't a proper delegate
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// This is a temporary method of connecting the constructor for now
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nsCSSFrameConstructor* constructor = new nsCSSFrameConstructor();
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if (nsnull != constructor) {
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constructor->Init(mDocument);
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nsresult result = constructor->QueryInterface(aIID, aInstancePtrResult);
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if (NS_FAILED(result)) {
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delete constructor;
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}
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return result;
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}
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (aIID.Equals(kISupportsIID)) {
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*aInstancePtrResult = (void*) this;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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PRInt32 HTMLStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults)
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{
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NS_PRECONDITION(nsnull != aPresContext, "null arg");
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NS_PRECONDITION(nsnull != aContent, "null arg");
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NS_PRECONDITION(nsnull != aResults, "null arg");
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PRInt32 matchCount = 0;
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nsIStyledContent* styledContent;
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if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent))) {
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PRInt32 nameSpace;
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styledContent->GetNameSpaceID(nameSpace);
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if (kNameSpaceID_HTML == nameSpace) {
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nsIAtom* tag;
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styledContent->GetTag(tag);
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// if we have anchor colors, check if this is an anchor with an href
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if (tag == nsHTMLAtoms::a) {
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if ((nsnull != mLinkRule) || (nsnull != mVisitedRule)) {
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// test link state
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nsILinkHandler* linkHandler;
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if ((NS_OK == aPresContext->GetLinkHandler(&linkHandler)) &&
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(nsnull != linkHandler)) {
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nsAutoString base, href;
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nsresult attrState = styledContent->GetAttribute(kNameSpaceID_None, nsHTMLAtoms::href, href);
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if (NS_CONTENT_ATTR_HAS_VALUE == attrState) {
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nsIURL* docURL = nsnull;
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nsIHTMLContent* htmlContent;
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if (NS_SUCCEEDED(styledContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent))) {
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htmlContent->GetBaseURL(docURL);
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nsAutoString absURLSpec;
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nsresult rv = NS_MakeAbsoluteURL(docURL, base, href, absURLSpec);
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NS_IF_RELEASE(docURL);
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nsLinkState state;
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if (NS_OK == linkHandler->GetLinkState(absURLSpec, state)) {
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switch (state) {
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case eLinkState_Unvisited:
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if (nsnull != mLinkRule) {
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aResults->AppendElement(mLinkRule);
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matchCount++;
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}
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break;
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case eLinkState_Visited:
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if (nsnull != mVisitedRule) {
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aResults->AppendElement(mVisitedRule);
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matchCount++;
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}
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break;
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}
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}
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NS_RELEASE(htmlContent);
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}
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}
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}
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NS_IF_RELEASE(linkHandler);
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} // end link/visited rules
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if (nsnull != mActiveRule) { // test active state of link
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nsIEventStateManager* eventStateManager;
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if ((NS_OK == aPresContext->GetEventStateManager(&eventStateManager)) &&
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(nsnull != eventStateManager)) {
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PRInt32 state;
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if (NS_OK == eventStateManager->GetContentState(aContent, state)) {
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if (0 != (state & NS_EVENT_STATE_ACTIVE)) {
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aResults->AppendElement(mActiveRule);
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matchCount++;
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}
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}
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NS_RELEASE(eventStateManager);
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}
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} // end active rule
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} // end A tag
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NS_IF_RELEASE(tag);
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} // end html namespace
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// just get the one and only style rule from the content
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nsIStyleRule* rule;
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styledContent->GetContentStyleRule(rule);
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if (nsnull != rule) {
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aResults->AppendElement(rule);
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NS_RELEASE(rule);
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matchCount++;
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}
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NS_RELEASE(styledContent);
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}
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return matchCount;
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}
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PRInt32 HTMLStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults)
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{
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// no pseudo frame style
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return 0;
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}
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// nsIStyleSheet api
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NS_IMETHODIMP
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HTMLStyleSheetImpl::GetURL(nsIURL*& aURL) const
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{
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NS_IF_ADDREF(mURL);
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aURL = mURL;
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return NS_OK;
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}
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|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::GetTitle(nsString& aTitle) const
|
|
{
|
|
aTitle.Truncate();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::GetType(nsString& aType) const
|
|
{
|
|
aType.Truncate();
|
|
aType.Append("text/html");
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::GetMediumCount(PRInt32& aCount) const
|
|
{
|
|
aCount = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const
|
|
{
|
|
aMedium = nsnull;
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::GetEnabled(PRBool& aEnabled) const
|
|
{
|
|
aEnabled = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::SetEnabled(PRBool aEnabled)
|
|
{ // these can't be disabled
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::GetParentSheet(nsIStyleSheet*& aParent) const
|
|
{
|
|
aParent = nsnull;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::GetOwningDocument(nsIDocument*& aDocument) const
|
|
{
|
|
NS_IF_ADDREF(mDocument);
|
|
aDocument = mDocument;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::SetOwningDocument(nsIDocument* aDocument)
|
|
{
|
|
mDocument = aDocument; // not refcounted
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::Init(nsIURL* aURL, nsIDocument* aDocument)
|
|
{
|
|
NS_PRECONDITION(aURL && aDocument, "null ptr");
|
|
if (! aURL || ! aDocument)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
if (mURL || mDocument)
|
|
return NS_ERROR_ALREADY_INITIALIZED;
|
|
|
|
mDocument = aDocument; // not refcounted!
|
|
mURL = aURL;
|
|
NS_ADDREF(mURL);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::Reset(nsIURL* aURL)
|
|
{
|
|
NS_IF_RELEASE(mURL);
|
|
mURL = aURL;
|
|
NS_ADDREF(mURL);
|
|
|
|
if (nsnull != mLinkRule) {
|
|
mLinkRule->mSheet = nsnull;
|
|
NS_RELEASE(mLinkRule);
|
|
}
|
|
if (nsnull != mVisitedRule) {
|
|
mVisitedRule->mSheet = nsnull;
|
|
NS_RELEASE(mVisitedRule);
|
|
}
|
|
if (nsnull != mActiveRule) {
|
|
mActiveRule->mSheet = nsnull;
|
|
NS_RELEASE(mActiveRule);
|
|
}
|
|
mAttrTable.Reset();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::SetLinkColor(nscolor aColor)
|
|
{
|
|
if (nsnull == mLinkRule) {
|
|
mLinkRule = new HTMLAnchorRule(this);
|
|
if (nsnull == mLinkRule) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
NS_ADDREF(mLinkRule);
|
|
}
|
|
mLinkRule->mColor = aColor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::SetActiveLinkColor(nscolor aColor)
|
|
{
|
|
if (nsnull == mActiveRule) {
|
|
mActiveRule = new HTMLAnchorRule(this);
|
|
if (nsnull == mActiveRule) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
NS_ADDREF(mActiveRule);
|
|
}
|
|
mActiveRule->mColor = aColor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::SetVisitedLinkColor(nscolor aColor)
|
|
{
|
|
if (nsnull == mVisitedRule) {
|
|
mVisitedRule = new HTMLAnchorRule(this);
|
|
if (nsnull == mVisitedRule) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
NS_ADDREF(mVisitedRule);
|
|
}
|
|
mVisitedRule->mColor = aColor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributesFor(nsIHTMLContent* aContent, nsIHTMLAttributes*& aAttributes)
|
|
{
|
|
nsIHTMLAttributes* attrs = aAttributes;
|
|
|
|
if (nsnull != attrs) {
|
|
nsMapAttributesFunc mapFunc;
|
|
aContent->GetAttributeMappingFunction(mapFunc);
|
|
AttributeKey key(mapFunc, attrs);
|
|
nsIHTMLAttributes* sharedAttrs = (nsIHTMLAttributes*)mAttrTable.Get(&key);
|
|
if (nsnull == sharedAttrs) { // we have a new unique set
|
|
mAttrTable.Put(&key, attrs);
|
|
}
|
|
else { // found existing set
|
|
if (sharedAttrs != aAttributes) {
|
|
aAttributes->ReleaseContentRef();
|
|
NS_RELEASE(aAttributes); // release content's ref
|
|
|
|
aAttributes = sharedAttrs;
|
|
aAttributes->AddContentRef();
|
|
NS_ADDREF(aAttributes); // add ref for content
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributeFor(nsIAtom* aAttribute,
|
|
const nsString& aValue,
|
|
nsIHTMLContent* aContent,
|
|
nsIHTMLAttributes*& aAttributes)
|
|
{
|
|
nsresult result = NS_OK;
|
|
nsIHTMLAttributes* attrs;
|
|
nsMapAttributesFunc mapFunc;
|
|
|
|
aContent->GetAttributeMappingFunction(mapFunc);
|
|
|
|
result = EnsureSingleAttributes(aAttributes, mapFunc, PR_TRUE, attrs);
|
|
|
|
if ((NS_OK == result) && (nsnull != attrs)) {
|
|
PRInt32 count;
|
|
attrs->SetAttribute(aAttribute, aValue, count);
|
|
|
|
result = UniqueAttributes(attrs, mapFunc, count, aAttributes);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#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
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::EnsureSingleAttributes(nsIHTMLAttributes*& aAttributes,
|
|
nsMapAttributesFunc aMapFunc,
|
|
PRBool aCreate,
|
|
nsIHTMLAttributes*& aSingleAttrs)
|
|
{
|
|
nsresult result = NS_OK;
|
|
PRInt32 contentRefCount;
|
|
|
|
if (nsnull == aAttributes) {
|
|
if (PR_TRUE == aCreate) {
|
|
if (nsnull != mRecycledAttrs) {
|
|
NS_ASSERT_REFCOUNT(mRecycledAttrs, 1, "attributes used elsewhere");
|
|
aSingleAttrs = mRecycledAttrs;
|
|
mRecycledAttrs = nsnull;
|
|
aSingleAttrs->SetMappingFunction(aMapFunc);
|
|
}
|
|
else {
|
|
result = NS_NewHTMLAttributes(&aSingleAttrs, this, aMapFunc);
|
|
}
|
|
}
|
|
else {
|
|
aSingleAttrs = nsnull;
|
|
}
|
|
contentRefCount = 0;
|
|
}
|
|
else {
|
|
aSingleAttrs = aAttributes;
|
|
aSingleAttrs->GetContentRefCount(contentRefCount);
|
|
NS_ASSERTION(0 < contentRefCount, "bad content ref count");
|
|
}
|
|
|
|
if (NS_OK == result) {
|
|
if (1 < contentRefCount) { // already shared, copy it
|
|
result = aSingleAttrs->Clone(&aSingleAttrs);
|
|
if (NS_OK != result) {
|
|
aSingleAttrs = nsnull;
|
|
return result;
|
|
}
|
|
contentRefCount = 0;
|
|
aAttributes->ReleaseContentRef();
|
|
NS_RELEASE(aAttributes);
|
|
}
|
|
else { // one content ref, ok to use, remove from table because hash may change
|
|
if (1 == contentRefCount) {
|
|
AttributeKey key(aMapFunc, aSingleAttrs);
|
|
mAttrTable.Remove(&key);
|
|
NS_ADDREF(aSingleAttrs); // add a local ref so we match up
|
|
}
|
|
}
|
|
// at this point, content ref count is 0 or 1, and we hold a local ref
|
|
// attrs is also unique and not in the table
|
|
NS_ASSERTION(((0 == contentRefCount) && (nsnull == aAttributes)) ||
|
|
((1 == contentRefCount) && (aSingleAttrs == aAttributes)), "this is broken");
|
|
}
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLStyleSheetImpl::UniqueAttributes(nsIHTMLAttributes*& aSingleAttrs,
|
|
nsMapAttributesFunc aMapFunc,
|
|
PRInt32 aAttrCount,
|
|
nsIHTMLAttributes*& aAttributes)
|
|
{
|
|
nsresult result = NS_OK;
|
|
|
|
if (0 < aAttrCount) {
|
|
AttributeKey key(aMapFunc, aSingleAttrs);
|
|
nsIHTMLAttributes* sharedAttrs = (nsIHTMLAttributes*)mAttrTable.Get(&key);
|
|
if (nsnull == sharedAttrs) { // we have a new unique set
|
|
mAttrTable.Put(&key, aSingleAttrs);
|
|
if (aSingleAttrs != aAttributes) {
|
|
NS_ASSERTION(nsnull == aAttributes, "this is broken");
|
|
aAttributes = aSingleAttrs;
|
|
aAttributes->AddContentRef();
|
|
NS_ADDREF(aAttributes); // add ref for content
|
|
}
|
|
}
|
|
else { // found existing set
|
|
NS_ASSERTION (sharedAttrs != aAttributes, "should never happen");
|
|
if (nsnull != aAttributes) {
|
|
aAttributes->ReleaseContentRef();
|
|
NS_RELEASE(aAttributes); // release content's ref
|
|
}
|
|
aAttributes = sharedAttrs;
|
|
aAttributes->AddContentRef();
|
|
NS_ADDREF(aAttributes); // add ref for content
|
|
|
|
if (nsnull == mRecycledAttrs) {
|
|
mRecycledAttrs = aSingleAttrs;
|
|
NS_ADDREF(mRecycledAttrs);
|
|
mRecycledAttrs->Reset();
|
|
}
|
|
}
|
|
}
|
|
else { // no attributes to store
|
|
if (nsnull != aAttributes) {
|
|
aAttributes->ReleaseContentRef();
|
|
NS_RELEASE(aAttributes);
|
|
}
|
|
if ((nsnull != aSingleAttrs) && (nsnull == mRecycledAttrs)) {
|
|
mRecycledAttrs = aSingleAttrs;
|
|
NS_ADDREF(mRecycledAttrs);
|
|
mRecycledAttrs->Reset();
|
|
}
|
|
}
|
|
NS_IF_RELEASE(aSingleAttrs);
|
|
return result;
|
|
}
|
|
|
|
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributeFor(nsIAtom* aAttribute,
|
|
const nsHTMLValue& aValue,
|
|
nsIHTMLContent* aContent,
|
|
nsIHTMLAttributes*& aAttributes)
|
|
{
|
|
nsresult result = NS_OK;
|
|
nsIHTMLAttributes* attrs;
|
|
PRBool hasValue = PRBool(eHTMLUnit_Null != aValue.GetUnit());
|
|
nsMapAttributesFunc mapFunc;
|
|
|
|
aContent->GetAttributeMappingFunction(mapFunc);
|
|
|
|
result = EnsureSingleAttributes(aAttributes, mapFunc, hasValue, attrs);
|
|
|
|
if ((NS_OK == result) && (nsnull != attrs)) {
|
|
PRInt32 count;
|
|
attrs->SetAttribute(aAttribute, aValue, count);
|
|
|
|
result = UniqueAttributes(attrs, mapFunc, count, aAttributes);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP HTMLStyleSheetImpl::UnsetAttributeFor(nsIAtom* aAttribute,
|
|
nsIHTMLContent* aContent,
|
|
nsIHTMLAttributes*& aAttributes)
|
|
{
|
|
nsresult result = NS_OK;
|
|
nsIHTMLAttributes* attrs;
|
|
nsMapAttributesFunc mapFunc;
|
|
|
|
aContent->GetAttributeMappingFunction(mapFunc);
|
|
|
|
result = EnsureSingleAttributes(aAttributes, mapFunc, PR_FALSE, attrs);
|
|
|
|
if ((NS_OK == result) && (nsnull != attrs)) {
|
|
PRInt32 count;
|
|
attrs->UnsetAttribute(aAttribute, count);
|
|
|
|
result = UniqueAttributes(attrs, mapFunc, count, aAttributes);
|
|
}
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
void HTMLStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
|
|
{
|
|
PRUnichar* buffer;
|
|
|
|
// Indent
|
|
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
|
|
|
|
fputs("HTML Style Sheet: ", out);
|
|
mURL->ToString(&buffer);
|
|
nsAutoString as(buffer,0);
|
|
fputs(as, out);
|
|
fputs("\n", out);
|
|
delete buffer;
|
|
}
|
|
|
|
|
|
// XXX For convenience and backwards compatibility
|
|
NS_HTML nsresult
|
|
NS_NewHTMLStyleSheet(nsIHTMLStyleSheet** aInstancePtrResult, nsIURL* aURL,
|
|
nsIDocument* aDocument)
|
|
{
|
|
nsresult rv;
|
|
nsIHTMLStyleSheet* sheet;
|
|
if (NS_FAILED(rv = NS_NewHTMLStyleSheet(&sheet)))
|
|
return rv;
|
|
|
|
if (NS_FAILED(rv = sheet->Init(aURL, aDocument))) {
|
|
NS_RELEASE(sheet);
|
|
return rv;
|
|
}
|
|
|
|
*aInstancePtrResult = sheet;
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_HTML nsresult
|
|
NS_NewHTMLStyleSheet(nsIHTMLStyleSheet** aInstancePtrResult)
|
|
{
|
|
if (aInstancePtrResult == nsnull) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
HTMLStyleSheetImpl *it = new HTMLStyleSheetImpl();
|
|
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(it);
|
|
*aInstancePtrResult = it;
|
|
return NS_OK;
|
|
}
|