pjs/layout/style/nsHTMLCSSStyleSheet.cpp

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9.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsIHTMLCSSStyleSheet.h"
#include "nsIArena.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsISupportsArray.h"
#include "nsHTMLAtoms.h"
#include "nsIHTMLContent.h"
#include "nsIStyleRule.h"
#include "nsIFrame.h"
#include "nsHTMLIIDs.h"
#include "nsICSSStyleRule.h"
#include "nsIStyleContext.h"
#include "nsIPresContext.h"
#include "nsIDocument.h"
static NS_DEFINE_IID(kIHTMLCSSStyleSheetIID, NS_IHTML_CSS_STYLE_SHEET_IID);
static NS_DEFINE_IID(kIStyleSheetIID, NS_ISTYLE_SHEET_IID);
static NS_DEFINE_IID(kICSSStyleRuleIID, NS_ICSS_STYLE_RULE_IID);
static NS_DEFINE_IID(kIStyleRuleIID, NS_ISTYLE_RULE_IID);
class HTMLCSSStyleSheetImpl : public nsIHTMLCSSStyleSheet {
public:
void* operator new(size_t size);
void* operator new(size_t size, nsIArena* aArena);
void operator delete(void* ptr);
HTMLCSSStyleSheetImpl();
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
NS_IMETHOD_(nsrefcnt) AddRef();
NS_IMETHOD_(nsrefcnt) Release();
// basic style sheet data
NS_IMETHOD Init(nsIURL* aURL, nsIDocument* aDocument);
NS_IMETHOD Reset(nsIURL* aURL);
NS_IMETHOD GetURL(nsIURL*& aURL) const;
NS_IMETHOD GetTitle(nsString& aTitle) const;
NS_IMETHOD GetType(nsString& aType) const;
NS_IMETHOD GetMediumCount(PRInt32& aCount) const;
NS_IMETHOD GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const;
NS_IMETHOD GetEnabled(PRBool& aEnabled) const;
NS_IMETHOD SetEnabled(PRBool aEnabled);
// style sheet owner info
NS_IMETHOD GetParentSheet(nsIStyleSheet*& aParent) const; // will be null
NS_IMETHOD GetOwningDocument(nsIDocument*& aDocument) const;
NS_IMETHOD SetOwningDocument(nsIDocument* aDocument);
virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
// XXX style rule enumerations
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
private:
// These are not supported and are not implemented!
HTMLCSSStyleSheetImpl(const HTMLCSSStyleSheetImpl& aCopy);
HTMLCSSStyleSheetImpl& operator=(const HTMLCSSStyleSheetImpl& aCopy);
protected:
virtual ~HTMLCSSStyleSheetImpl();
protected:
PRUint32 mInHeap : 1;
PRUint32 mRefCnt : 31;
nsIURL* mURL;
nsIDocument* mDocument;
};
void* HTMLCSSStyleSheetImpl::operator new(size_t size)
{
HTMLCSSStyleSheetImpl* rv = (HTMLCSSStyleSheetImpl*) ::operator new(size);
#ifdef NS_DEBUG
if (nsnull != rv) {
nsCRT::memset(rv, 0xEE, size);
}
#endif
rv->mInHeap = 1;
return (void*) rv;
}
void* HTMLCSSStyleSheetImpl::operator new(size_t size, nsIArena* aArena)
{
HTMLCSSStyleSheetImpl* rv = (HTMLCSSStyleSheetImpl*) aArena->Alloc(PRInt32(size));
#ifdef NS_DEBUG
if (nsnull != rv) {
nsCRT::memset(rv, 0xEE, size);
}
#endif
rv->mInHeap = 0;
return (void*) rv;
}
void HTMLCSSStyleSheetImpl::operator delete(void* ptr)
{
HTMLCSSStyleSheetImpl* sheet = (HTMLCSSStyleSheetImpl*) ptr;
if (nsnull != sheet) {
if (sheet->mInHeap) {
::operator delete(ptr);
}
}
}
HTMLCSSStyleSheetImpl::HTMLCSSStyleSheetImpl()
: nsIHTMLCSSStyleSheet(),
mURL(nsnull),
mDocument(nsnull)
{
NS_INIT_REFCNT();
}
HTMLCSSStyleSheetImpl::~HTMLCSSStyleSheetImpl()
{
NS_RELEASE(mURL);
}
NS_IMPL_ADDREF(HTMLCSSStyleSheetImpl)
NS_IMPL_RELEASE(HTMLCSSStyleSheetImpl)
nsresult HTMLCSSStyleSheetImpl::QueryInterface(const nsIID& aIID,
void** aInstancePtrResult)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null pointer");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
if (aIID.Equals(kIHTMLCSSStyleSheetIID)) {
*aInstancePtrResult = (void*) ((nsIHTMLCSSStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIStyleSheetIID)) {
*aInstancePtrResult = (void*) ((nsIStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtrResult = (void*) ((nsISupports*)this);
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
PRInt32 HTMLCSSStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
NS_PRECONDITION(nsnull != aPresContext, "null arg");
NS_PRECONDITION(nsnull != aContent, "null arg");
NS_PRECONDITION(nsnull != aResults, "null arg");
PRInt32 matchCount = 0;
nsIStyledContent* styledContent;
// just get the one and only style rule from the content's STYLE attribute
if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent))) {
nsIStyleRule* rule = nsnull;
if (NS_SUCCEEDED(styledContent->GetInlineStyleRule(rule))) {
if (nsnull != rule) {
aResults->AppendElement(rule);
matchCount++;
nsICSSStyleRule* cssRule;
if (NS_SUCCEEDED(rule->QueryInterface(kICSSStyleRuleIID, (void**)&cssRule))) {
nsIStyleRule* important = cssRule->GetImportantRule();
if (nsnull != important) {
aResults->AppendElement(important);
matchCount++;
NS_RELEASE(important);
}
NS_RELEASE(cssRule);
}
NS_RELEASE(rule);
}
}
NS_RELEASE(styledContent);
}
return matchCount;
}
PRInt32 HTMLCSSStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
// no pseudo frame style...
return 0;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::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
HTMLCSSStyleSheetImpl::Reset(nsIURL* aURL)
{
NS_IF_RELEASE(mURL);
mURL = aURL;
NS_ADDREF(mURL);
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetURL(nsIURL*& aURL) const
{
NS_IF_ADDREF(mURL);
aURL = mURL;
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetTitle(nsString& aTitle) const
{
aTitle.Truncate();
aTitle.Append("Internal HTML/CSS Style Sheet");
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetType(nsString& aType) const
{
aType.Truncate();
aType.Append("text/html");
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetMediumCount(PRInt32& aCount) const
{
aCount = 0;
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const
{
aMedium = nsnull;
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetEnabled(PRBool& aEnabled) const
{
aEnabled = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::SetEnabled(PRBool aEnabled)
{ // these can't be disabled
return NS_OK;
}
// style sheet owner info
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetParentSheet(nsIStyleSheet*& aParent) const
{
aParent = nsnull;
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetOwningDocument(nsIDocument*& aDocument) const
{
NS_IF_ADDREF(mDocument);
aDocument = mDocument;
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::SetOwningDocument(nsIDocument* aDocument)
{
mDocument = aDocument;
return NS_OK;
}
void HTMLCSSStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
{
PRUnichar* buffer;
// Indent
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("HTML CSS Style Sheet: ", out);
mURL->ToString(&buffer);
nsAutoString as(buffer,0);
fputs(as, out);
fputs("\n", out);
delete buffer;
}
// XXX For backwards compatibility and convenience
NS_HTML nsresult
NS_NewHTMLCSSStyleSheet(nsIHTMLCSSStyleSheet** aInstancePtrResult, nsIURL* aURL,
nsIDocument* aDocument)
{
nsresult rv;
nsIHTMLCSSStyleSheet* sheet;
if (NS_FAILED(rv = NS_NewHTMLCSSStyleSheet(&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_NewHTMLCSSStyleSheet(nsIHTMLCSSStyleSheet** aInstancePtrResult)
{
if (aInstancePtrResult == nsnull) {
return NS_ERROR_NULL_POINTER;
}
HTMLCSSStyleSheetImpl* it = new HTMLCSSStyleSheetImpl();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(it);
*aInstancePtrResult = it;
return NS_OK;
}