pjs/layout/style/nsHTMLStyleSheet.cpp

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33 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 "nsINameSpaceManager.h"
#include "nsIHTMLStyleSheet.h"
#include "nsIArena.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#ifdef NECKO
#include "nsIIOService.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsNeckoUtil.h"
static NS_DEFINE_CID(kIOServiceCID, NS_IOSERVICE_CID);
#endif // NECKO
#include "nsISupportsArray.h"
#include "nsHashtable.h"
#include "nsIHTMLContent.h"
#include "nsIHTMLAttributes.h"
#include "nsIStyleRuleProcessor.h"
#include "nsIStyleRule.h"
#include "nsIFrame.h"
#include "nsIStyleContext.h"
#include "nsHTMLAtoms.h"
#include "nsIPresContext.h"
#include "nsILinkHandler.h"
#include "nsIEventStateManager.h"
#include "nsIDocument.h"
#include "nsHTMLIIDs.h"
#include "nsCSSFrameConstructor.h"
#include "nsHTMLParts.h"
#include "nsIPresShell.h"
#include "nsStyleConsts.h"
#include "nsHTMLContainerFrame.h"
#include "nsINameSpaceManager.h"
#include "nsLayoutAtoms.h"
static NS_DEFINE_IID(kIHTMLStyleSheetIID, NS_IHTML_STYLE_SHEET_IID);
static NS_DEFINE_IID(kIStyleSheetIID, NS_ISTYLE_SHEET_IID);
static NS_DEFINE_IID(kIStyleRuleIID, NS_ISTYLE_RULE_IID);
static NS_DEFINE_IID(kIStyleFrameConstructionIID, NS_ISTYLE_FRAME_CONSTRUCTION_IID);
class HTMLColorRule : public nsIStyleRule {
public:
HTMLColorRule(nsIHTMLStyleSheet* aSheet);
virtual ~HTMLColorRule();
NS_DECL_ISUPPORTS
NS_IMETHOD Equals(const nsIStyleRule* aRule, PRBool& aValue) const;
NS_IMETHOD HashValue(PRUint32& aValue) const;
NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aSheet) const;
// Strength is an out-of-band weighting, always 0 here
NS_IMETHOD GetStrength(PRInt32& aStrength) const;
NS_IMETHOD MapFontStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext);
NS_IMETHOD MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext);
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
nscolor mColor;
nsIHTMLStyleSheet* mSheet;
};
class HTMLDocumentColorRule : public HTMLColorRule {
public:
HTMLDocumentColorRule(nsIHTMLStyleSheet* aSheet);
virtual ~HTMLDocumentColorRule();
NS_IMETHOD MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext);
nscolor mBackgroundColor;
PRBool mForegroundSet;
PRBool mBackgroundSet;
};
HTMLColorRule::HTMLColorRule(nsIHTMLStyleSheet* aSheet)
: mSheet(aSheet)
{
NS_INIT_REFCNT();
}
HTMLColorRule::~HTMLColorRule()
{
}
NS_IMPL_ISUPPORTS(HTMLColorRule, kIStyleRuleIID);
NS_IMETHODIMP
HTMLColorRule::Equals(const nsIStyleRule* aRule, PRBool& aResult) const
{
aResult = PRBool(this == aRule);
return NS_OK;
}
NS_IMETHODIMP
HTMLColorRule::HashValue(PRUint32& aValue) const
{
aValue = (PRUint32)(mColor);
return NS_OK;
}
NS_IMETHODIMP
HTMLColorRule::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
HTMLColorRule::GetStrength(PRInt32& aStrength) const
{
aStrength = 0;
return NS_OK;
}
NS_IMETHODIMP
HTMLColorRule::MapFontStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
{
return NS_OK;
}
NS_IMETHODIMP
HTMLColorRule::MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
{
nsStyleColor* styleColor = (nsStyleColor*)(aContext->GetMutableStyleData(eStyleStruct_Color));
if (nsnull != styleColor) {
styleColor->mColor = mColor;
}
return NS_OK;
}
NS_IMETHODIMP
HTMLColorRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
HTMLDocumentColorRule::HTMLDocumentColorRule(nsIHTMLStyleSheet* aSheet)
: HTMLColorRule(aSheet)
{
mForegroundSet = PR_FALSE;
mBackgroundSet = PR_FALSE;
}
HTMLDocumentColorRule::~HTMLDocumentColorRule()
{
}
NS_IMETHODIMP
HTMLDocumentColorRule::MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
{
nsStyleColor* styleColor = (nsStyleColor*)(aContext->GetMutableStyleData(eStyleStruct_Color));
if (nsnull != styleColor) {
if (mForegroundSet) {
styleColor->mColor = mColor;
}
if (mBackgroundSet) {
styleColor->mBackgroundColor = mBackgroundColor;
styleColor->mBackgroundFlags &= ~NS_STYLE_BG_COLOR_TRANSPARENT;
}
}
return NS_OK;
}
// -----------------------------------------------------------
// this rule only applies in NavQuirks mode
// -----------------------------------------------------------
class TableBackgroundRule: public nsIStyleRule {
public:
TableBackgroundRule(nsIHTMLStyleSheet* aSheet);
virtual ~TableBackgroundRule();
NS_DECL_ISUPPORTS
NS_IMETHOD Equals(const nsIStyleRule* aRule, PRBool& aResult) const;
NS_IMETHOD HashValue(PRUint32& aValue) const;
NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aSheet) const;
// Strength is an out-of-band weighting, always 0 here
NS_IMETHOD GetStrength(PRInt32& aStrength) const;
NS_IMETHOD MapFontStyleInto(nsIStyleContext* aContext,
nsIPresContext* aPresContext);
NS_IMETHOD MapStyleInto(nsIStyleContext* aContext,
nsIPresContext* aPresContext);
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
nsIHTMLStyleSheet* mSheet; // not ref-counted, cleared by content
};
TableBackgroundRule::TableBackgroundRule(nsIHTMLStyleSheet* aSheet)
{
NS_INIT_REFCNT();
mSheet = aSheet;
}
TableBackgroundRule::~TableBackgroundRule()
{
}
NS_IMPL_ISUPPORTS(TableBackgroundRule, kIStyleRuleIID);
NS_IMETHODIMP
TableBackgroundRule::Equals(const nsIStyleRule* aRule, PRBool& aResult) const
{
aResult = PRBool(this == aRule);
return NS_OK;
}
NS_IMETHODIMP
TableBackgroundRule::HashValue(PRUint32& aValue) const
{
aValue = 0;
return NS_OK;
}
NS_IMETHODIMP
TableBackgroundRule::GetStyleSheet(nsIStyleSheet*& aSheet) const
{
aSheet = mSheet;
return NS_OK;
}
// Strength is an out-of-band weighting, useful for mapping CSS ! important
// always 0 here
NS_IMETHODIMP
TableBackgroundRule::GetStrength(PRInt32& aStrength) const
{
aStrength = 0;
return NS_OK;
}
NS_IMETHODIMP
TableBackgroundRule::MapFontStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
{
return NS_OK;
}
NS_IMETHODIMP
TableBackgroundRule::MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
{
nsIStyleContext* parentContext = aContext->GetParent();
if (parentContext) {
nsStyleColor* styleColor;
styleColor = (nsStyleColor*)aContext->GetMutableStyleData(eStyleStruct_Color);
const nsStyleColor* parentStyleColor;
parentStyleColor = (const nsStyleColor*)parentContext->GetStyleData(eStyleStruct_Color);
if (!(parentStyleColor->mBackgroundFlags & NS_STYLE_BG_COLOR_TRANSPARENT)) {
styleColor->mBackgroundColor = parentStyleColor->mBackgroundColor;
styleColor->mBackgroundFlags &= ~NS_STYLE_BG_COLOR_TRANSPARENT;
}
if (!(parentStyleColor->mBackgroundFlags & NS_STYLE_BG_IMAGE_NONE)) {
styleColor->mBackgroundImage = parentStyleColor->mBackgroundImage;
styleColor->mBackgroundFlags &= ~NS_STYLE_BG_IMAGE_NONE;
}
NS_RELEASE(parentContext);
}
return NS_OK;
}
NS_IMETHODIMP
TableBackgroundRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
// -----------------------------------------------------------
class AttributeKey: public nsHashKey
{
public:
AttributeKey(nsIHTMLMappedAttributes* aAttributes);
virtual ~AttributeKey(void);
PRBool Equals(const nsHashKey* aOther) const;
PRUint32 HashValue(void) const;
nsHashKey* Clone(void) const;
private:
AttributeKey(void);
AttributeKey(const AttributeKey& aCopy);
AttributeKey& operator=(const AttributeKey& aCopy);
public:
nsIHTMLMappedAttributes* mAttributes;
union {
struct {
PRUint32 mHashSet: 1;
PRUint32 mHashCode: 31;
} mBits;
PRUint32 mInitializer;
} mHash;
};
MOZ_DECL_CTOR_COUNTER(AttributeKey);
AttributeKey::AttributeKey(nsIHTMLMappedAttributes* aAttributes)
: mAttributes(aAttributes)
{
MOZ_COUNT_CTOR(AttributeKey);
NS_ADDREF(mAttributes);
mHash.mInitializer = 0;
}
AttributeKey::~AttributeKey(void)
{
MOZ_COUNT_DTOR(AttributeKey);
NS_RELEASE(mAttributes);
}
PRBool AttributeKey::Equals(const nsHashKey* aOther) const
{
const AttributeKey* other = (const AttributeKey*)aOther;
PRBool equals;
mAttributes->Equals(other->mAttributes, equals);
return equals;
}
PRUint32 AttributeKey::HashValue(void) const
{
if (0 == mHash.mBits.mHashSet) {
AttributeKey* self = (AttributeKey*)this; // break const
PRUint32 hash;
mAttributes->HashValue(hash);
self->mHash.mBits.mHashCode = (0x7FFFFFFF & hash);
self->mHash.mBits.mHashSet = 1;
}
return mHash.mBits.mHashCode;
}
nsHashKey* AttributeKey::Clone(void) const
{
AttributeKey* clown = new AttributeKey(mAttributes);
if (nsnull != clown) {
clown->mHash.mInitializer = mHash.mInitializer;
}
return clown;
}
// -----------------------------------------------------------
class HTMLStyleSheetImpl : public nsIHTMLStyleSheet,
public nsIStyleRuleProcessor {
public:
void* operator new(size_t size);
void* operator new(size_t size, nsIArena* aArena);
void operator delete(void* ptr);
HTMLStyleSheetImpl(void);
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
NS_IMETHOD_(nsrefcnt) AddRef();
NS_IMETHOD_(nsrefcnt) Release();
// nsIStyleSheet api
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* aDocumemt);
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);
// nsIHTMLStyleSheet api
NS_IMETHOD Init(nsIURI* aURL, nsIDocument* aDocument);
NS_IMETHOD Reset(nsIURI* aURL);
NS_IMETHOD GetLinkColor(nscolor& aColor);
NS_IMETHOD GetActiveLinkColor(nscolor& aColor);
NS_IMETHOD GetVisitedLinkColor(nscolor& aColor);
NS_IMETHOD GetDocumentForegroundColor(nscolor& aColor);
NS_IMETHOD GetDocumentBackgroundColor(nscolor& aColor);
NS_IMETHOD SetLinkColor(nscolor aColor);
NS_IMETHOD SetActiveLinkColor(nscolor aColor);
NS_IMETHOD SetVisitedLinkColor(nscolor aColor);
NS_IMETHOD SetDocumentForegroundColor(nscolor aColor);
NS_IMETHOD SetDocumentBackgroundColor(nscolor aColor);
// Attribute management methods, aAttributes is an in/out param
NS_IMETHOD SetAttributesFor(nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes);
NS_IMETHOD SetAttributeFor(nsIAtom* aAttribute, const nsString& aValue,
PRBool aMappedToStyle,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes);
NS_IMETHOD SetAttributeFor(nsIAtom* aAttribute, const nsHTMLValue& aValue,
PRBool aMappedToStyle,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes);
NS_IMETHOD UnsetAttributeFor(nsIAtom* aAttribute, nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes);
// Mapped Attribute management methods
NS_IMETHOD UniqueMappedAttributes(nsIHTMLMappedAttributes* aMapped,
nsIHTMLMappedAttributes*& aUniqueMapped);
NS_IMETHOD DropMappedAttributes(nsIHTMLMappedAttributes* aMapped);
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
private:
// These are not supported and are not implemented!
HTMLStyleSheetImpl(const HTMLStyleSheetImpl& aCopy);
HTMLStyleSheetImpl& operator=(const HTMLStyleSheetImpl& aCopy);
protected:
virtual ~HTMLStyleSheetImpl();
protected:
PRUint32 mInHeap : 1;
PRUint32 mRefCnt : 31;
nsIURI* mURL;
nsIDocument* mDocument;
HTMLColorRule* mLinkRule;
HTMLColorRule* mVisitedRule;
HTMLColorRule* mActiveRule;
HTMLDocumentColorRule* mDocumentColorRule;
TableBackgroundRule* mTableBackgroundRule;
nsHashtable mMappedAttrTable;
};
void* HTMLStyleSheetImpl::operator new(size_t size)
{
HTMLStyleSheetImpl* rv = (HTMLStyleSheetImpl*) ::operator new(size);
#ifdef NS_DEBUG
if (nsnull != rv) {
nsCRT::memset(rv, 0xEE, size);
}
#endif
rv->mInHeap = 1;
return (void*) rv;
}
void* HTMLStyleSheetImpl::operator new(size_t size, nsIArena* aArena)
{
HTMLStyleSheetImpl* rv = (HTMLStyleSheetImpl*) aArena->Alloc(PRInt32(size));
#ifdef NS_DEBUG
if (nsnull != rv) {
nsCRT::memset(rv, 0xEE, size);
}
#endif
rv->mInHeap = 0;
return (void*) rv;
}
void HTMLStyleSheetImpl::operator delete(void* ptr)
{
HTMLStyleSheetImpl* sheet = (HTMLStyleSheetImpl*) ptr;
if (nsnull != sheet) {
if (sheet->mInHeap) {
::operator delete(ptr);
}
}
}
HTMLStyleSheetImpl::HTMLStyleSheetImpl(void)
: nsIHTMLStyleSheet(),
mURL(nsnull),
mDocument(nsnull),
mLinkRule(nsnull),
mVisitedRule(nsnull),
mActiveRule(nsnull),
mDocumentColorRule(nsnull)
{
NS_INIT_REFCNT();
mTableBackgroundRule = new TableBackgroundRule(this);
NS_ADDREF(mTableBackgroundRule);
}
PRBool MappedDropSheet(nsHashKey *aKey, void *aData, void* closure)
{
nsIHTMLMappedAttributes* mapped = (nsIHTMLMappedAttributes*)aData;
mapped->DropStyleSheetReference();
return PR_TRUE;
}
HTMLStyleSheetImpl::~HTMLStyleSheetImpl()
{
NS_RELEASE(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);
}
if (nsnull != mDocumentColorRule) {
mDocumentColorRule->mSheet = nsnull;
NS_RELEASE(mDocumentColorRule);
}
if (nsnull != mTableBackgroundRule) {
mTableBackgroundRule->mSheet = nsnull;
NS_RELEASE(mTableBackgroundRule);
}
mMappedAttrTable.Enumerate(MappedDropSheet);
}
NS_IMPL_ADDREF(HTMLStyleSheetImpl)
NS_IMPL_RELEASE(HTMLStyleSheetImpl)
nsresult HTMLStyleSheetImpl::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(kIHTMLStyleSheetIID)) {
*aInstancePtrResult = (void*) ((nsIHTMLStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIStyleSheetIID)) {
*aInstancePtrResult = (void*) ((nsIStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(nsIStyleRuleProcessor::GetIID())) {
*aInstancePtrResult = (void*) ((nsIStyleRuleProcessor*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIStyleFrameConstructionIID)) {
// XXX this breaks XPCOM rules since it isn't a proper delegate
// This is a temporary method of connecting the constructor for now
nsCSSFrameConstructor* constructor = new nsCSSFrameConstructor();
if (nsnull != constructor) {
constructor->Init(mDocument);
nsresult result = constructor->QueryInterface(aIID, aInstancePtrResult);
if (NS_FAILED(result)) {
delete constructor;
}
return result;
}
return NS_ERROR_OUT_OF_MEMORY;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtrResult = (void*) this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
HTMLStyleSheetImpl::GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* /*aPrevProcessor*/)
{
aProcessor = this;
NS_ADDREF(aProcessor);
return NS_OK;
}
NS_IMETHODIMP
HTMLStyleSheetImpl::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;
if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent))) {
PRInt32 nameSpace;
styledContent->GetNameSpaceID(nameSpace);
if (kNameSpaceID_HTML == nameSpace) {
nsIAtom* tag;
styledContent->GetTag(tag);
// if we have anchor colors, check if this is an anchor with an href
if (tag == nsHTMLAtoms::a) {
if ((nsnull != mLinkRule) || (nsnull != mVisitedRule)) {
// test link state
nsILinkHandler* linkHandler;
if (NS_OK == aPresContext->GetLinkHandler(&linkHandler)) {
nsAutoString base, href;
nsresult attrState = styledContent->GetAttribute(kNameSpaceID_None, nsHTMLAtoms::href, href);
if (NS_CONTENT_ATTR_HAS_VALUE == attrState) {
if (! linkHandler) {
if (nsnull != mLinkRule) {
aResults->AppendElement(mLinkRule);
}
}
else {
nsIURI* docURL = nsnull;
nsIHTMLContent* htmlContent;
if (NS_SUCCEEDED(styledContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent))) {
htmlContent->GetBaseURL(docURL);
nsAutoString absURLSpec;
nsresult rv;
#ifndef NECKO
rv = NS_MakeAbsoluteURL(docURL, base, href, absURLSpec);
#else
nsIURI *baseUri = nsnull;
rv = docURL->QueryInterface(nsIURI::GetIID(), (void**)&baseUri);
if (NS_FAILED(rv)) return 0;
rv = NS_MakeAbsoluteURI(href, baseUri, absURLSpec);
NS_RELEASE(baseUri);
#endif // NECKO
NS_IF_RELEASE(docURL);
nsLinkState state;
if (NS_OK == linkHandler->GetLinkState(absURLSpec.GetUnicode(), state)) {
switch (state) {
case eLinkState_Unvisited:
if (nsnull != mLinkRule) {
aResults->AppendElement(mLinkRule);
}
break;
case eLinkState_Visited:
if (nsnull != mVisitedRule) {
aResults->AppendElement(mVisitedRule);
}
break;
default:
break;
}
}
NS_RELEASE(htmlContent);
}
}
}
}
NS_IF_RELEASE(linkHandler);
} // end link/visited rules
if (nsnull != mActiveRule) { // test active state of link
nsIEventStateManager* eventStateManager;
if ((NS_OK == aPresContext->GetEventStateManager(&eventStateManager)) &&
(nsnull != eventStateManager)) {
PRInt32 state;
if (NS_OK == eventStateManager->GetContentState(aContent, state)) {
if (0 != (state & NS_EVENT_STATE_ACTIVE)) {
aResults->AppendElement(mActiveRule);
}
}
NS_RELEASE(eventStateManager);
}
} // end active rule
} // end A tag
// add the quirks background compatibility rule if in quirks mode
else if ((tag == nsHTMLAtoms::td) ||
(tag == nsHTMLAtoms::th) ||
(tag == nsHTMLAtoms::tr) ||
(tag == nsHTMLAtoms::thead) || // Nav4.X doesn't support row groups, but it is a lot
(tag == nsHTMLAtoms::tbody) || // easier passing from the table to rows this way
(tag == nsHTMLAtoms::tfoot)) {
nsCompatibility mode;
aPresContext->GetCompatibilityMode(&mode);
if (eCompatibility_NavQuirks == mode) {
if (mDocumentColorRule) {
aResults->AppendElement(mDocumentColorRule);
}
aResults->AppendElement(mTableBackgroundRule);
}
}
else if (tag == nsHTMLAtoms::html) {
if (mDocumentColorRule) {
aResults->AppendElement(mDocumentColorRule);
}
}
NS_IF_RELEASE(tag);
} // end html namespace
// just get the style rules from the content
styledContent->GetContentStyleRules(aResults);
NS_RELEASE(styledContent);
}
return NS_OK;
}
// Test if style is dependent on content state
NS_IMETHODIMP
HTMLStyleSheetImpl::HasStateDependentStyle(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aContent)
{
nsresult result = NS_COMFALSE;
if (mActiveRule || mLinkRule || mVisitedRule) { // do we have any rules dependent on state?
nsIStyledContent* styledContent;
if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent))) {
PRInt32 nameSpace;
styledContent->GetNameSpaceID(nameSpace);
if (kNameSpaceID_HTML == nameSpace) {
nsIAtom* tag;
styledContent->GetTag(tag);
// if we have anchor colors, check if this is an anchor with an href
if (tag == nsHTMLAtoms::a) {
nsAutoString href;
nsresult attrState = styledContent->GetAttribute(kNameSpaceID_None, nsHTMLAtoms::href, href);
if (NS_CONTENT_ATTR_HAS_VALUE == attrState) {
result = NS_OK; // yes, style will depend on link state
}
}
NS_IF_RELEASE(tag);
}
NS_RELEASE(styledContent);
}
}
return result;
}
NS_IMETHODIMP
HTMLStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
// no pseudo frame style
return NS_OK;
}
// nsIStyleSheet api
NS_IMETHODIMP
HTMLStyleSheetImpl::GetURL(nsIURI*& aURL) const
{
NS_IF_ADDREF(mURL);
aURL = mURL;
return NS_OK;
}
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::UseForMedium(nsIAtom* aMedium) const
{
return NS_OK; // works for all media
}
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(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;
}
NS_IMETHODIMP HTMLStyleSheetImpl::Reset(nsIURI* 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);
}
if (mDocumentColorRule) {
mDocumentColorRule->mSheet = nsnull;
NS_RELEASE(mDocumentColorRule);
}
if (mTableBackgroundRule) {
mTableBackgroundRule->mSheet = nsnull;
NS_RELEASE(mTableBackgroundRule);
}
mMappedAttrTable.Enumerate(MappedDropSheet);
mMappedAttrTable.Reset();
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::GetLinkColor(nscolor& aColor)
{
if (nsnull == mLinkRule) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mLinkRule->mColor;
return NS_OK;
}
}
NS_IMETHODIMP HTMLStyleSheetImpl::GetActiveLinkColor(nscolor& aColor)
{
if (nsnull == mActiveRule) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mActiveRule->mColor;
return NS_OK;
}
}
NS_IMETHODIMP HTMLStyleSheetImpl::GetVisitedLinkColor(nscolor& aColor)
{
if (nsnull == mVisitedRule) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mVisitedRule->mColor;
return NS_OK;
}
}
NS_IMETHODIMP HTMLStyleSheetImpl::GetDocumentForegroundColor(nscolor& aColor)
{
if ((nsnull == mDocumentColorRule) ||
!mDocumentColorRule->mForegroundSet) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mDocumentColorRule->mColor;
return NS_OK;
}
}
NS_IMETHODIMP HTMLStyleSheetImpl::GetDocumentBackgroundColor(nscolor& aColor)
{
if ((nsnull == mDocumentColorRule) ||
!mDocumentColorRule->mBackgroundSet) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mDocumentColorRule->mBackgroundColor;
return NS_OK;
}
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetLinkColor(nscolor aColor)
{
if (nsnull == mLinkRule) {
mLinkRule = new HTMLColorRule(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 HTMLColorRule(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 HTMLColorRule(this);
if (nsnull == mVisitedRule) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mVisitedRule);
}
mVisitedRule->mColor = aColor;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetDocumentForegroundColor(nscolor aColor)
{
if (nsnull == mDocumentColorRule) {
mDocumentColorRule = new HTMLDocumentColorRule(this);
if (nsnull == mDocumentColorRule) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mDocumentColorRule);
}
mDocumentColorRule->mColor = aColor;
mDocumentColorRule->mForegroundSet = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetDocumentBackgroundColor(nscolor aColor)
{
if (nsnull == mDocumentColorRule) {
mDocumentColorRule = new HTMLDocumentColorRule(this);
if (nsnull == mDocumentColorRule) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mDocumentColorRule);
}
mDocumentColorRule->mBackgroundColor = aColor;
mDocumentColorRule->mBackgroundSet = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributesFor(nsIHTMLContent* aContent, nsIHTMLAttributes*& aAttributes)
{
if (aAttributes) {
aAttributes->SetStyleSheet(this);
}
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributeFor(nsIAtom* aAttribute,
const nsString& aValue,
PRBool aMappedToStyle,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
if (! aAttributes) {
result = NS_NewHTMLAttributes(&aAttributes);
}
if (aAttributes) {
result = aAttributes->SetAttributeFor(aAttribute, aValue, aMappedToStyle,
aContent, this);
}
return result;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributeFor(nsIAtom* aAttribute,
const nsHTMLValue& aValue,
PRBool aMappedToStyle,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
if ((! aAttributes) && (eHTMLUnit_Null != aValue.GetUnit())) {
result = NS_NewHTMLAttributes(&aAttributes);
}
if (aAttributes) {
PRInt32 count;
result = aAttributes->SetAttributeFor(aAttribute, aValue, aMappedToStyle,
aContent, this, count);
if (0 == count) {
NS_RELEASE(aAttributes);
}
}
return result;
}
NS_IMETHODIMP HTMLStyleSheetImpl::UnsetAttributeFor(nsIAtom* aAttribute,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
if (aAttributes) {
PRInt32 count;
result = aAttributes->UnsetAttributeFor(aAttribute, aContent, this, count);
if (0 == count) {
NS_RELEASE(aAttributes);
}
}
return result;
}
NS_IMETHODIMP
HTMLStyleSheetImpl::UniqueMappedAttributes(nsIHTMLMappedAttributes* aMapped,
nsIHTMLMappedAttributes*& aUniqueMapped)
{
nsresult result = NS_OK;
AttributeKey key(aMapped);
nsIHTMLMappedAttributes* sharedAttrs = (nsIHTMLMappedAttributes*)mMappedAttrTable.Get(&key);
if (nsnull == sharedAttrs) { // we have a new unique set
mMappedAttrTable.Put(&key, aMapped);
aMapped->SetUniqued(PR_TRUE);
NS_ADDREF(aMapped);
aUniqueMapped = aMapped;
}
else { // found existing set
aUniqueMapped = sharedAttrs;
NS_ADDREF(aUniqueMapped);
}
return result;
}
NS_IMETHODIMP
HTMLStyleSheetImpl::DropMappedAttributes(nsIHTMLMappedAttributes* aMapped)
{
if (aMapped) {
PRBool inTable = PR_FALSE;
aMapped->GetUniqued(inTable);
if (inTable) {
AttributeKey key(aMapped);
nsIHTMLMappedAttributes* old = (nsIHTMLMappedAttributes*)mMappedAttrTable.Remove(&key);
NS_ASSERTION(old == aMapped, "not in table");
aMapped->SetUniqued(PR_FALSE);
}
}
return NS_OK;
}
void HTMLStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
{
// Indent
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("HTML Style Sheet: ", out);
#ifdef NECKO
char* urlSpec = nsnull;
mURL->GetSpec(&urlSpec);
if (urlSpec) {
fputs(urlSpec, out);
nsCRT::free(urlSpec);
}
#else
PRUnichar* urlSpec = nsnull;
mURL->ToString(&urlSpec);
if (urlSpec) {
nsAutoString buffer(urlSpec);
fputs(buffer, out);
delete [] urlSpec;
}
#endif
fputs("\n", out);
}
// XXX For convenience and backwards compatibility
NS_HTML nsresult
NS_NewHTMLStyleSheet(nsIHTMLStyleSheet** aInstancePtrResult, nsIURI* 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;
}