зеркало из https://github.com/mozilla/gecko-dev.git
367 строки
9.6 KiB
C++
367 строки
9.6 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 "nsIHTMLCSSStyleSheet.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 "nsHTMLAtoms.h"
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#include "nsIHTMLContent.h"
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#include "nsIStyleRule.h"
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#include "nsIFrame.h"
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#include "nsHTMLIIDs.h"
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#include "nsICSSStyleRule.h"
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#include "nsIStyleContext.h"
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#include "nsIPresContext.h"
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#include "nsIDocument.h"
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static NS_DEFINE_IID(kIHTMLCSSStyleSheetIID, NS_IHTML_CSS_STYLE_SHEET_IID);
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static NS_DEFINE_IID(kIStyleSheetIID, NS_ISTYLE_SHEET_IID);
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static NS_DEFINE_IID(kICSSStyleRuleIID, NS_ICSS_STYLE_RULE_IID);
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static NS_DEFINE_IID(kIStyleRuleIID, NS_ISTYLE_RULE_IID);
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class HTMLCSSStyleSheetImpl : public nsIHTMLCSSStyleSheet {
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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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HTMLCSSStyleSheetImpl();
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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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// basic style sheet data
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NS_IMETHOD Init(nsIURL* aURL, nsIDocument* aDocument);
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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* aDocument);
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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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// XXX style rule enumerations
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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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HTMLCSSStyleSheetImpl(const HTMLCSSStyleSheetImpl& aCopy);
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HTMLCSSStyleSheetImpl& operator=(const HTMLCSSStyleSheetImpl& aCopy);
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protected:
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virtual ~HTMLCSSStyleSheetImpl();
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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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};
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void* HTMLCSSStyleSheetImpl::operator new(size_t size)
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{
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HTMLCSSStyleSheetImpl* rv = (HTMLCSSStyleSheetImpl*) ::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* HTMLCSSStyleSheetImpl::operator new(size_t size, nsIArena* aArena)
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{
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HTMLCSSStyleSheetImpl* rv = (HTMLCSSStyleSheetImpl*) 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 HTMLCSSStyleSheetImpl::operator delete(void* ptr)
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{
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HTMLCSSStyleSheetImpl* sheet = (HTMLCSSStyleSheetImpl*) ptr;
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if (nsnull != sheet) {
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if (sheet->mInHeap) {
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::delete ptr;
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}
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}
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}
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HTMLCSSStyleSheetImpl::HTMLCSSStyleSheetImpl()
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: nsIHTMLCSSStyleSheet(),
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mURL(nsnull),
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mDocument(nsnull)
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{
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NS_INIT_REFCNT();
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}
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HTMLCSSStyleSheetImpl::~HTMLCSSStyleSheetImpl()
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{
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NS_RELEASE(mURL);
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}
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NS_IMPL_ADDREF(HTMLCSSStyleSheetImpl)
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NS_IMPL_RELEASE(HTMLCSSStyleSheetImpl)
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nsresult HTMLCSSStyleSheetImpl::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(kIHTMLCSSStyleSheetIID)) {
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*aInstancePtrResult = (void*) ((nsIHTMLCSSStyleSheet*)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(kISupportsIID)) {
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*aInstancePtrResult = (void*) ((nsISupports*)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 HTMLCSSStyleSheetImpl::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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nsIHTMLContent* htmlContent;
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// just get the one and only style rule from the content's STYLE attribute
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if (NS_OK == aContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent)) {
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nsIStyleRule* rule = nsnull;
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if (NS_SUCCEEDED(htmlContent->GetInlineStyleRule(rule))) {
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if (nsnull != rule) {
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aResults->AppendElement(rule);
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matchCount++;
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nsICSSStyleRule* cssRule;
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if (NS_SUCCEEDED(rule->QueryInterface(kICSSStyleRuleIID, (void**)&cssRule))) {
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nsIStyleRule* important = cssRule->GetImportantRule();
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if (nsnull != important) {
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aResults->AppendElement(important);
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matchCount++;
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NS_RELEASE(important);
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}
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NS_RELEASE(cssRule);
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}
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NS_RELEASE(rule);
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}
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}
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NS_RELEASE(htmlContent);
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}
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return matchCount;
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}
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PRInt32 HTMLCSSStyleSheetImpl::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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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::Init(nsIURL* aURL, nsIDocument* aDocument)
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{
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NS_PRECONDITION(aURL && aDocument, "null ptr");
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if (! aURL || ! aDocument)
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return NS_ERROR_NULL_POINTER;
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if (mURL || mDocument)
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return NS_ERROR_ALREADY_INITIALIZED;
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mDocument = aDocument; // not refcounted!
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mURL = aURL;
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NS_ADDREF(mURL);
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::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
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HTMLCSSStyleSheetImpl::GetTitle(nsString& aTitle) const
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{
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aTitle.Truncate();
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aTitle.Append("Internal HTML/CSS Style Sheet");
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::GetType(nsString& aType) const
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{
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aType.Truncate();
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aType.Append("text/html");
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::GetMediumCount(PRInt32& aCount) const
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{
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aCount = 0;
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const
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{
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aMedium = nsnull;
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return NS_ERROR_INVALID_ARG;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::GetEnabled(PRBool& aEnabled) const
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{
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aEnabled = PR_TRUE;
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::SetEnabled(PRBool aEnabled)
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{ // these can't be disabled
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return NS_OK;
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}
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// style sheet owner info
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::GetParentSheet(nsIStyleSheet*& aParent) const
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{
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aParent = nsnull;
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::GetOwningDocument(nsIDocument*& aDocument) const
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{
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NS_IF_ADDREF(mDocument);
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aDocument = mDocument;
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::SetOwningDocument(nsIDocument* aDocument)
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{
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mDocument = aDocument;
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return NS_OK;
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}
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void HTMLCSSStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
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{
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nsAutoString buffer;
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// Indent
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for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("HTML CSS Style Sheet: ", out);
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mURL->ToString(buffer);
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fputs(buffer, out);
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fputs("\n", out);
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}
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// XXX For backwards compatibility and convenience
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NS_HTML nsresult
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NS_NewHTMLCSSStyleSheet(nsIHTMLCSSStyleSheet** aInstancePtrResult, nsIURL* aURL,
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nsIDocument* aDocument)
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{
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nsresult rv;
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nsIHTMLCSSStyleSheet* sheet;
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if (NS_FAILED(rv = NS_NewHTMLCSSStyleSheet(&sheet)))
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return rv;
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if (NS_FAILED(rv = sheet->Init(aURL, aDocument))) {
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NS_RELEASE(sheet);
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return rv;
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}
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*aInstancePtrResult = sheet;
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return NS_OK;
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}
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NS_HTML nsresult
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NS_NewHTMLCSSStyleSheet(nsIHTMLCSSStyleSheet** aInstancePtrResult)
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{
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if (aInstancePtrResult == nsnull) {
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return NS_ERROR_NULL_POINTER;
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}
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HTMLCSSStyleSheetImpl* it = new HTMLCSSStyleSheetImpl();
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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NS_ADDREF(it);
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*aInstancePtrResult = it;
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return NS_OK;
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}
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