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pjs/layout/style/nsHTMLCSSStyleSheet.cpp

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23 KiB
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/* -*- 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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*/
#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 "nsIStyleRuleProcessor.h"
#include "nsIStyleContext.h"
#include "nsIMutableStyleContext.h"
#include "nsIPresContext.h"
#include "nsIDocument.h"
#include "nsCOMPtr.h"
#include "nsIStyleSet.h"
#include "nsISizeOfHandler.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 CSSFirstLineRule : public nsIStyleRule {
public:
CSSFirstLineRule(nsIHTMLCSSStyleSheet* aSheet);
virtual ~CSSFirstLineRule();
NS_DECL_ISUPPORTS
NS_IMETHOD Equals(const nsIStyleRule* aRule, PRBool& aValue) const;
NS_IMETHOD HashValue(PRUint32& aValue) const;
NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aSheet) const;
NS_IMETHOD GetStrength(PRInt32& aStrength) const;
NS_IMETHOD MapStyleInto(nsIMutableStyleContext* aContext,
nsIPresContext* aPresContext);
NS_IMETHOD MapFontStyleInto(nsIMutableStyleContext* aContext,
nsIPresContext* aPresContext);
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize);
nsIHTMLCSSStyleSheet* mSheet;
};
CSSFirstLineRule::CSSFirstLineRule(nsIHTMLCSSStyleSheet* aSheet)
: mSheet(aSheet)
{
NS_INIT_REFCNT();
}
CSSFirstLineRule::~CSSFirstLineRule()
{
}
NS_IMPL_ISUPPORTS(CSSFirstLineRule, kIStyleRuleIID);
NS_IMETHODIMP
CSSFirstLineRule::Equals(const nsIStyleRule* aRule, PRBool& aResult) const
{
aResult = PRBool(this == aRule);
return NS_OK;
}
NS_IMETHODIMP
CSSFirstLineRule::HashValue(PRUint32& aValue) const
{
aValue = (PRUint32)7; // XXX got a better suggestion?
return NS_OK;
}
NS_IMETHODIMP
CSSFirstLineRule::GetStyleSheet(nsIStyleSheet*& aSheet) const
{
NS_IF_ADDREF(mSheet);
aSheet = mSheet;
return NS_OK;
}
// Strength is an out-of-band weighting, always 0 here
NS_IMETHODIMP
CSSFirstLineRule::GetStrength(PRInt32& aStrength) const
{
aStrength = 0;
return NS_OK;
}
NS_IMETHODIMP
CSSFirstLineRule::MapFontStyleInto(nsIMutableStyleContext* aContext,
nsIPresContext* aPresContext)
{
return NS_OK;
}
// Fixup the style context so that all of the properties that don't
// apply (CSS2 spec section 5.12.1) don't apply.
//
// The properties that apply: font-properties, color-properties,
// backgorund-properties, word-spacing, letter-spacing,
// text-decoration, vertical-align, text-transform, line-height,
// text-shadow, and clear.
//
// Everything else doesn't apply.
NS_IMETHODIMP
CSSFirstLineRule::MapStyleInto(nsIMutableStyleContext* aContext,
nsIPresContext* aPresContext)
{
nsIStyleContext* parentContext;
parentContext = aContext->GetParent();
// Disable border
nsStyleSpacing* spacing = (nsStyleSpacing*)
aContext->GetMutableStyleData(eStyleStruct_Spacing);
if (spacing) {
spacing->SetBorderStyle(NS_SIDE_TOP, NS_STYLE_BORDER_STYLE_NONE);
spacing->SetBorderStyle(NS_SIDE_RIGHT, NS_STYLE_BORDER_STYLE_NONE);
spacing->SetBorderStyle(NS_SIDE_BOTTOM, NS_STYLE_BORDER_STYLE_NONE);
spacing->SetBorderStyle(NS_SIDE_LEFT, NS_STYLE_BORDER_STYLE_NONE);
}
// Undo any change made to "direction"
nsStyleDisplay* display = (nsStyleDisplay*)
aContext->GetMutableStyleData(eStyleStruct_Display);
if (parentContext) {
const nsStyleDisplay* parentDisplay = (const nsStyleDisplay*)
parentContext->GetStyleData(eStyleStruct_Display);
if (parentDisplay) {
display->mDirection = parentDisplay->mDirection;
}
}
// Undo any change made to "cursor"
nsStyleColor* color = (nsStyleColor*)
aContext->GetMutableStyleData(eStyleStruct_Color);
if (parentContext) {
const nsStyleColor* parentColor = (const nsStyleColor*)
parentContext->GetStyleData(eStyleStruct_Color);
if (parentColor) {
color->mCursor = parentColor->mCursor;
}
}
// Undo any change to quotes
nsStyleContent* content = (nsStyleContent*)
aContext->GetMutableStyleData(eStyleStruct_Content);
if (parentContext) {
const nsStyleContent* parentContent = (const nsStyleContent*)
parentContext->GetStyleData(eStyleStruct_Content);
if (parentContent) {
nsAutoString open, close;
PRUint32 i, n = parentContent->QuotesCount();
content->AllocateQuotes(n);
for (i = 0; i < n; i++) {
parentContent->GetQuotesAt(i, open, close);
content->SetQuotesAt(i, open, close);
}
}
}
NS_RELEASE(parentContext);
return NS_OK;
}
NS_IMETHODIMP
CSSFirstLineRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as CSSFirstLineRule's size):
* 1) sizeof(*this)
*
* Contained / Aggregated data (not reported as CSSFirstLineRule's size):
* 1) Delegate to mSheet if it exists
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void CSSFirstLineRule::SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize)
{
NS_ASSERTION(aSizeOfHandler != nsnull, "SizeOf handler cannot be null");
// first get the unique items collection
UNIQUE_STYLE_ITEMS(uniqueItems);
if(! uniqueItems->AddItem((void*)this) ){
// object has already been accounted for
return;
}
// get or create a tag for this instance
nsCOMPtr<nsIAtom> tag;
tag = getter_AddRefs(NS_NewAtom("CSSFirstLine-LetterRule"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(*this);
aSizeOfHandler->AddSize(tag,aSize);
if(mSheet){
PRUint32 localSize=0;
mSheet->SizeOf(aSizeOfHandler, localSize);
}
}
// -----------------------------------------------------------
class CSSFirstLetterRule : public CSSFirstLineRule {
public:
CSSFirstLetterRule(nsIHTMLCSSStyleSheet* aSheet);
NS_IMETHOD MapStyleInto(nsIMutableStyleContext* aContext,
nsIPresContext* aPresContext);
};
CSSFirstLetterRule::CSSFirstLetterRule(nsIHTMLCSSStyleSheet* aSheet)
: CSSFirstLineRule(aSheet)
{
}
// Fixup the style context so that all of the properties that don't
// apply (CSS2 spec section 5.12.2) don't apply.
//
// These properties apply: font-properties, color-properties,
// backgorund-properties, text-decoration, vertical-align,
// text-transform, line-height, margin-properties,
// padding-properties, border-properties, float, text-shadow and
// clear.
//
// Everything else doesn't apply.
NS_IMETHODIMP
CSSFirstLetterRule::MapStyleInto(nsIMutableStyleContext* aContext,
nsIPresContext* aPresContext)
{
nsIStyleContext* parentContext;
parentContext = aContext->GetParent();
// Undo any change made to "direction"
nsStyleDisplay* display = (nsStyleDisplay*)
aContext->GetMutableStyleData(eStyleStruct_Display);
if (parentContext) {
const nsStyleDisplay* parentDisplay = (const nsStyleDisplay*)
parentContext->GetStyleData(eStyleStruct_Display);
if (parentDisplay) {
display->mDirection = parentDisplay->mDirection;
}
}
// Undo any change made to "cursor"
nsStyleColor* color = (nsStyleColor*)
aContext->GetMutableStyleData(eStyleStruct_Color);
if (parentContext) {
const nsStyleColor* parentColor = (const nsStyleColor*)
parentContext->GetStyleData(eStyleStruct_Color);
if (parentColor) {
color->mCursor = parentColor->mCursor;
}
}
// Undo any change to quotes
nsStyleContent* content = (nsStyleContent*)
aContext->GetMutableStyleData(eStyleStruct_Content);
if (parentContext) {
const nsStyleContent* parentContent = (const nsStyleContent*)
parentContext->GetStyleData(eStyleStruct_Content);
if (parentContent) {
nsAutoString open, close;
PRUint32 i, n = parentContent->QuotesCount();
content->AllocateQuotes(n);
for (i = 0; i < n; i++) {
parentContent->GetQuotesAt(i, open, close);
content->SetQuotesAt(i, open, close);
}
}
}
NS_RELEASE(parentContext);
return NS_OK;
}
// -----------------------------------------------------------
class HTMLCSSStyleSheetImpl : public nsIHTMLCSSStyleSheet,
public nsIStyleRuleProcessor {
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(nsIURI* aURL, nsIDocument* aDocument);
NS_IMETHOD Reset(nsIURI* aURL);
NS_IMETHOD GetURL(nsIURI*& 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 UseForMedium(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);
NS_IMETHOD GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* aPrevProcessor);
// nsIStyleRuleProcessor api
NS_IMETHOD RulesMatching(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aContent,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
NS_IMETHOD RulesMatching(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
NS_IMETHOD HasStateDependentStyle(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aContent);
// XXX style rule enumerations
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize);
// If changing the given attribute cannot affect style context, aAffects
// will be PR_FALSE on return.
NS_IMETHOD AttributeAffectsStyle(nsIAtom *aAttribute, nsIContent *aContent,
PRBool &aAffects);
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;
NS_DECL_OWNINGTHREAD // for thread-safety checking
nsIURI* mURL;
nsIDocument* mDocument;
CSSFirstLineRule* mFirstLineRule;
CSSFirstLetterRule* mFirstLetterRule;
};
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),
mFirstLineRule(nsnull),
mFirstLetterRule(nsnull)
{
NS_INIT_REFCNT();
}
HTMLCSSStyleSheetImpl::~HTMLCSSStyleSheetImpl()
{
NS_RELEASE(mURL);
if (nsnull != mFirstLineRule) {
mFirstLineRule->mSheet = nsnull;
NS_RELEASE(mFirstLineRule);
}
if (nsnull != mFirstLetterRule) {
mFirstLetterRule->mSheet = nsnull;
NS_RELEASE(mFirstLetterRule);
}
}
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(NS_GET_IID(nsIStyleRuleProcessor))) {
*aInstancePtrResult = (void*) ((nsIStyleRuleProcessor*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtrResult = (void*) ((nsISupports*)(nsIStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* /*aPrevProcessor*/)
{
aProcessor = this;
NS_ADDREF(aProcessor);
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aContent,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
NS_PRECONDITION(nsnull != aPresContext, "null arg");
NS_PRECONDITION(nsnull != aContent, "null arg");
NS_PRECONDITION(nsnull != aResults, "null arg");
nsIStyledContent* styledContent;
// just get the one and only style rule from the content's STYLE attribute
if (NS_SUCCEEDED(aContent->QueryInterface(NS_GET_IID(nsIStyledContent), (void**)&styledContent))) {
PRUint32 index = 0;
aResults->Count(&index);
if (NS_SUCCEEDED(styledContent->GetInlineStyleRules(aResults))) {
PRUint32 postCount = 0;
aResults->Count(&postCount);
while (index < postCount) {
nsIStyleRule* rule = (nsIStyleRule*)aResults->ElementAt(index++);
nsICSSStyleRule* cssRule;
if (NS_SUCCEEDED(rule->QueryInterface(kICSSStyleRuleIID, (void**)&cssRule))) {
nsIStyleRule* important = cssRule->GetImportantRule();
if (nsnull != important) {
aResults->AppendElement(important);
NS_RELEASE(important);
}
NS_RELEASE(cssRule);
}
NS_RELEASE(rule);
}
}
NS_RELEASE(styledContent);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
if (aPseudoTag == nsHTMLAtoms::firstLinePseudo) {
PRUint32 cnt;
nsresult rv = aResults->Count(&cnt);
if (NS_SUCCEEDED(rv) && cnt) {
if (nsnull == mFirstLineRule) {
mFirstLineRule = new CSSFirstLineRule(this);
if (mFirstLineRule) {
NS_ADDREF(mFirstLineRule);
}
}
if (mFirstLineRule) {
aResults->AppendElement(mFirstLineRule);
return NS_OK;
}
}
}
if (aPseudoTag == nsHTMLAtoms::firstLetterPseudo) {
PRUint32 cnt;
nsresult rv = aResults->Count(&cnt);
if (NS_SUCCEEDED(rv) && cnt) {
if (nsnull == mFirstLetterRule) {
mFirstLetterRule = new CSSFirstLetterRule(this);
if (mFirstLetterRule) {
NS_ADDREF(mFirstLetterRule);
}
}
if (mFirstLetterRule) {
aResults->AppendElement(mFirstLetterRule);
return NS_OK;
}
}
}
// else no pseudo frame style...
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::Init(nsIURI* 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;
}
// Test if style is dependent on content state
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::HasStateDependentStyle(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aContent)
{
return NS_COMFALSE;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::Reset(nsIURI* aURL)
{
NS_IF_RELEASE(mURL);
mURL = aURL;
NS_ADDREF(mURL);
if (nsnull != mFirstLineRule) {
mFirstLineRule->mSheet = nsnull;
NS_RELEASE(mFirstLineRule);
}
if (nsnull != mFirstLetterRule) {
mFirstLetterRule->mSheet = nsnull;
NS_RELEASE(mFirstLetterRule);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetURL(nsIURI*& aURL) const
{
NS_IF_ADDREF(mURL);
aURL = mURL;
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetTitle(nsString& aTitle) const
{
aTitle.AssignWithConversion("Internal HTML/CSS Style Sheet");
return NS_OK;
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::GetType(nsString& aType) const
{
aType.AssignWithConversion("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::UseForMedium(nsIAtom* aMedium) const
{
return NS_OK; // works for all media
}
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
{
// Indent
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("HTML CSS Style Sheet: ", out);
char* urlSpec = nsnull;
mURL->GetSpec(&urlSpec);
if (urlSpec) {
fputs(urlSpec, out);
nsCRT::free(urlSpec);
}
fputs("\n", out);
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as HTMLCSSStyleSheetImpl's size):
* 1) sizeof(*this)
*
* Contained / Aggregated data (not reported as HTMLCSSStyleSheetImpl's size):
* 1) We don't really delegate but count seperately the FirstLineRule and
* the FirstLetterRule if the exist and are unique instances
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void HTMLCSSStyleSheetImpl::SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize)
{
NS_ASSERTION(aSizeOfHandler != nsnull, "SizeOf handler cannot be null");
// first get the unique items collection
UNIQUE_STYLE_ITEMS(uniqueItems);
if(! uniqueItems->AddItem((void*)this)){
// this style sheet is lared accounted for
return;
}
PRUint32 localSize=0;
// create a tag for this instance
nsCOMPtr<nsIAtom> tag;
tag = getter_AddRefs(NS_NewAtom("HTMLCSSStyleSheet"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(HTMLCSSStyleSheetImpl);
aSizeOfHandler->AddSize(tag,aSize);
// Now the associated rules (if they exist)
// - mFirstLineRule
// - mFirstLetterRule
if(mFirstLineRule && uniqueItems->AddItem((void*)mFirstLineRule)){
localSize = sizeof(*mFirstLineRule);
aSize += localSize;
tag = getter_AddRefs(NS_NewAtom("FirstLineRule"));
aSizeOfHandler->AddSize(tag,localSize);
}
if(mFirstLetterRule && uniqueItems->AddItem((void*)mFirstLetterRule)){
localSize = sizeof(*mFirstLetterRule);
aSize += localSize;
tag = getter_AddRefs(NS_NewAtom("FirstLetterRule"));
aSizeOfHandler->AddSize(tag,localSize);
}
}
NS_IMETHODIMP
HTMLCSSStyleSheetImpl::AttributeAffectsStyle(nsIAtom *aAttribute,
nsIContent *aContent,
PRBool &aAffects)
{
// XXX can attributes affect rules in these?
aAffects = PR_FALSE;
return NS_OK;
}
// XXX For backwards compatibility and convenience
NS_HTML nsresult
NS_NewHTMLCSSStyleSheet(nsIHTMLCSSStyleSheet** aInstancePtrResult, nsIURI* 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;
}
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