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pjs/layout/style/nsHTMLStyleSheet.cpp

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40 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>
*
* This Original Code has been modified by IBM Corporation. Modifications made by IBM
* described herein are Copyright (c) International Business Machines Corporation, 2000.
* Modifications to Mozilla code or documentation identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
#include "nsINameSpaceManager.h"
#include "nsIHTMLStyleSheet.h"
#include "nsIArena.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsISupportsArray.h"
#include "nsHashtable.h"
#include "nsIHTMLContent.h"
#include "nsIHTMLAttributes.h"
#include "nsILink.h"
#include "nsStyleUtil.h"
#include "nsIStyleRuleProcessor.h"
#include "nsIStyleRule.h"
#include "nsIFrame.h"
#include "nsIStyleContext.h"
#include "nsHTMLAtoms.h"
#include "nsIPresContext.h"
#include "nsIEventStateManager.h"
#include "nsIDocument.h"
#include "nsHTMLIIDs.h"
#include "nsICSSFrameConstructor.h"
#include "nsIStyleFrameConstruction.h"
#include "nsHTMLParts.h"
#include "nsIPresShell.h"
#include "nsStyleConsts.h"
#include "nsINameSpaceManager.h"
#include "nsLayoutAtoms.h"
#include "nsContentCID.h"
#include "nsLayoutCID.h"
#include "nsIRuleWalker.h"
#include "nsIStyleSet.h"
#include "nsISizeOfHandler.h"
static NS_DEFINE_IID(kIStyleFrameConstructionIID, NS_ISTYLE_FRAME_CONSTRUCTION_IID);
static NS_DEFINE_CID(kHTMLAttributesCID, NS_HTMLATTRIBUTES_CID);
static NS_DEFINE_CID(kCSSFrameConstructorCID, NS_CSSFRAMECONSTRUCTOR_CID);
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;
// The new mapping function.
NS_IMETHOD MapRuleInfoInto(nsRuleData* aRuleData);
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
virtual void SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize);
nscolor mColor;
nsIHTMLStyleSheet* mSheet;
};
class HTMLDocumentColorRule : public HTMLColorRule {
public:
HTMLDocumentColorRule(nsIHTMLStyleSheet* aSheet);
virtual ~HTMLDocumentColorRule();
NS_IMETHOD MapRuleInfoInto(nsRuleData* aRuleData);
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize);
void Reset() {
mForegroundSet = PR_FALSE;
mBackgroundSet = PR_FALSE;
}
nscolor mBackgroundColor;
PRBool mForegroundSet;
PRBool mBackgroundSet;
};
HTMLColorRule::HTMLColorRule(nsIHTMLStyleSheet* aSheet)
: mSheet(aSheet)
{
NS_INIT_REFCNT();
}
HTMLColorRule::~HTMLColorRule()
{
}
NS_IMPL_ISUPPORTS(HTMLColorRule, NS_GET_IID(nsIStyleRule));
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::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData->mSID == eStyleStruct_Color && aRuleData->mColorData) {
if (aRuleData->mColorData->mColor.GetUnit() == eCSSUnit_Null)
aRuleData->mColorData->mColor = nsCSSValue(mColor);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLColorRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as HTMLColorRule's size):
* 1) sizeof(*this) +
*
* Contained / Aggregated data (not reported as HTMLColorRule's size):
* 1) delegate to the mSheet
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void HTMLColorRule::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("HTMLColorRule"));
// 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);
}
}
HTMLDocumentColorRule::HTMLDocumentColorRule(nsIHTMLStyleSheet* aSheet)
: HTMLColorRule(aSheet)
{
Reset();
}
HTMLDocumentColorRule::~HTMLDocumentColorRule()
{
}
NS_IMETHODIMP
HTMLDocumentColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (mForegroundSet && aRuleData->mSID == eStyleStruct_Color && aRuleData->mColorData) {
nsCSSValue val; val.SetColorValue(mColor);
aRuleData->mColorData->mColor = val;
}
else if (mBackgroundSet && aRuleData->mSID == eStyleStruct_Background && aRuleData->mColorData) {
nsCSSValue val; val.SetColorValue(mBackgroundColor);
aRuleData->mColorData->mBackColor = val;
}
return NS_OK;
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as HTMLDocumentColorRule's size):
* 1) sizeof(*this)
*
* Contained / Aggregated data (not reported as HTMLDocumentColorRule's size):
* 1) Delegate to the mSheet
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void HTMLDocumentColorRule::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("HTMLDocumentColorRule"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(*this);
aSizeOfHandler->AddSize(tag,aSize);
if(mSheet){
PRUint32 localSize;
mSheet->SizeOf(aSizeOfHandler, localSize);
}
}
class GenericTableRule: public nsIStyleRule {
public:
GenericTableRule(nsIHTMLStyleSheet* aSheet);
virtual ~GenericTableRule();
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;
// The new mapping function.
NS_IMETHOD MapRuleInfoInto(nsRuleData* aRuleData);
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize);
void Reset()
{
}
nsIHTMLStyleSheet* mSheet; // not ref-counted, cleared by content
};
GenericTableRule::GenericTableRule(nsIHTMLStyleSheet* aSheet)
{
NS_INIT_REFCNT();
mSheet = aSheet;
}
GenericTableRule::~GenericTableRule()
{
}
NS_IMPL_ISUPPORTS(GenericTableRule, NS_GET_IID(nsIStyleRule));
NS_IMETHODIMP
GenericTableRule::Equals(const nsIStyleRule* aRule, PRBool& aResult) const
{
aResult = PRBool(this == aRule);
return NS_OK;
}
NS_IMETHODIMP
GenericTableRule::HashValue(PRUint32& aValue) const
{
aValue = 0;
return NS_OK;
}
NS_IMETHODIMP
GenericTableRule::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
GenericTableRule::GetStrength(PRInt32& aStrength) const
{
aStrength = 0;
return NS_OK;
}
NS_IMETHODIMP
GenericTableRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
// Nothing to do.
return NS_OK;
}
NS_IMETHODIMP
GenericTableRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as GenericTableRule's size):
* 1) sizeof(*this) +
*
* Contained / Aggregated data (not reported as GenericTableRule's size):
* 1) Delegate to the mSheet if it exists
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void GenericTableRule::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("GenericTableRule"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(*this);
aSizeOfHandler->AddSize(tag,aSize);
if(mSheet){
PRUint32 localSize;
mSheet->SizeOf(aSizeOfHandler, localSize);
}
}
// -----------------------------------------------------------
// this rule handles <th> inheritance
// -----------------------------------------------------------
class TableTHRule: public GenericTableRule {
public:
TableTHRule(nsIHTMLStyleSheet* aSheet);
virtual ~TableTHRule();
void Reset()
{
GenericTableRule::Reset();
}
NS_IMETHOD MapRuleInfoInto(nsRuleData* aRuleData);
};
TableTHRule::TableTHRule(nsIHTMLStyleSheet* aSheet)
: GenericTableRule(aSheet)
{
}
TableTHRule::~TableTHRule()
{
}
static void PostResolveCallback(nsStyleStruct* aStyleStruct, nsRuleData* aRuleData)
{
nsStyleText* text = (nsStyleText*)aStyleStruct;
if (text->mTextAlign == NS_STYLE_TEXT_ALIGN_DEFAULT) {
nsCOMPtr<nsIStyleContext> parentContext = getter_AddRefs(aRuleData->mStyleContext->GetParent());
if (parentContext) {
const nsStyleText* parentStyleText =
(const nsStyleText*)parentContext->GetStyleData(eStyleStruct_Text);
PRUint8 parentAlign = parentStyleText->mTextAlign;
text->mTextAlign = (NS_STYLE_TEXT_ALIGN_DEFAULT == parentAlign)
? NS_STYLE_TEXT_ALIGN_CENTER : parentAlign;
}
}
}
NS_IMETHODIMP
TableTHRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData && aRuleData->mSID == eStyleStruct_Text) {
aRuleData->mCanStoreInRuleTree = PR_FALSE;
aRuleData->mPostResolveCallback = &PostResolveCallback;
}
return NS_OK;
}
// -----------------------------------------------------------
class AttributeKey: public nsHashKey
{
public:
AttributeKey(nsIHTMLMappedAttributes* aAttributes);
virtual ~AttributeKey(void);
PRBool Equals(const nsHashKey* aOther) const;
PRUint32 HashCode(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::HashCode(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);
nsresult Init();
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,
nsIRuleWalker* aRuleWalker);
NS_IMETHOD RulesMatching(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsICSSPseudoComparator* aComparator,
nsIRuleWalker* aRuleWalker);
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 nsAReadableString& 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;
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!
HTMLStyleSheetImpl(const HTMLStyleSheetImpl& aCopy);
HTMLStyleSheetImpl& operator=(const HTMLStyleSheetImpl& aCopy);
protected:
virtual ~HTMLStyleSheetImpl();
protected:
PRUint32 mInHeap : 1;
PRUint32 mRefCnt : 31;
NS_DECL_OWNINGTHREAD // for thread-safety checking
nsIURI* mURL;
nsIDocument* mDocument;
HTMLColorRule* mLinkRule;
HTMLColorRule* mVisitedRule;
HTMLColorRule* mActiveRule;
HTMLDocumentColorRule* mDocumentColorRule;
TableTHRule* mTableTHRule;
// NOTE: if adding more rules, be sure to update
// the SizeOf method to include them
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();
}
nsresult
HTMLStyleSheetImpl::Init()
{
mTableTHRule = new TableTHRule(this);
if (!mTableTHRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mTableTHRule);
mDocumentColorRule = new HTMLDocumentColorRule(this);
if (!mDocumentColorRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mDocumentColorRule);
return NS_OK;
}
PRBool PR_CALLBACK MappedDropSheet(nsHashKey *aKey, void *aData, void* closure)
{
nsIHTMLMappedAttributes* mapped = (nsIHTMLMappedAttributes*)aData;
mapped->DropStyleSheetReference();
return PR_TRUE;
}
HTMLStyleSheetImpl::~HTMLStyleSheetImpl()
{
NS_IF_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 != mTableTHRule) {
mTableTHRule->mSheet = nsnull;
NS_RELEASE(mTableTHRule);
}
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(NS_GET_IID(nsIHTMLStyleSheet))) {
*aInstancePtrResult = (void*) ((nsIHTMLStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsIStyleSheet))) {
*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(kIStyleFrameConstructionIID)) {
// XXX this breaks XPCOM rules since it isn't a proper delegate
// This is a temporary method of connecting the constructor for now
nsresult result;
nsCOMPtr<nsICSSFrameConstructor> constructor(do_CreateInstance(kCSSFrameConstructorCID,&result));
if (NS_SUCCEEDED(result)) {
result = constructor->Init(mDocument);
if (NS_SUCCEEDED(result)) {
result = constructor->QueryInterface(aIID, aInstancePtrResult);
}
}
return result;
}
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,
nsIRuleWalker* aRuleWalker)
{
NS_PRECONDITION(nsnull != aPresContext, "null arg");
NS_PRECONDITION(nsnull != aContent, "null arg");
NS_PRECONDITION(nsnull != aRuleWalker, "null arg");
nsIStyledContent* styledContent;
if (NS_SUCCEEDED(aContent->QueryInterface(NS_GET_IID(nsIStyledContent), (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 (mLinkRule || mVisitedRule || mActiveRule) {
nsLinkState linkState;
if (nsStyleUtil::IsHTMLLink(aContent, tag, aPresContext, &linkState)) {
switch (linkState) {
case eLinkState_Unvisited:
if (mLinkRule)
aRuleWalker->Forward(mLinkRule);
break;
case eLinkState_Visited:
if (mVisitedRule)
aRuleWalker->Forward(mVisitedRule);
break;
default:
break;
}
// No need to add to the active rule if it's not a link
if (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 (state & NS_EVENT_STATE_ACTIVE)
aRuleWalker->Forward(mActiveRule);
}
NS_RELEASE(eventStateManager);
}
} // end active rule
}
} // end link/visited/active rules
} // end A tag
// add the rule to handle text-align for a <th>
else if (tag == nsHTMLAtoms::th) {
aRuleWalker->Forward(mTableTHRule);
}
else if (tag == nsHTMLAtoms::table) {
nsCompatibility mode;
aPresContext->GetCompatibilityMode(&mode);
if (eCompatibility_NavQuirks == mode) {
aRuleWalker->Forward(mDocumentColorRule);
}
}
else if (tag == nsHTMLAtoms::html) {
aRuleWalker->Forward(mDocumentColorRule);
}
NS_IF_RELEASE(tag);
} // end html namespace
// just get the style rules from the content
styledContent->WalkContentStyleRules(aRuleWalker);
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(NS_GET_IID(nsIStyledContent), (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,
nsICSSPseudoComparator* aComparator,
nsIRuleWalker* aRuleWalker)
{
// 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.AssignWithConversion("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);
}
mDocumentColorRule->Reset();
mTableTHRule->Reset();
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 (!mDocumentColorRule->mForegroundSet)
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
aColor = mDocumentColorRule->mColor;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::GetDocumentBackgroundColor(nscolor& aColor)
{
if (!mDocumentColorRule->mBackgroundSet)
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
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)
{
mDocumentColorRule->mColor = aColor;
mDocumentColorRule->mForegroundSet = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetDocumentBackgroundColor(nscolor aColor)
{
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 nsAReadableString& aValue,
PRBool aMappedToStyle,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
if (! aAttributes) {
result = nsComponentManager::CreateInstance(kHTMLAttributesCID, nsnull,
NS_GET_IID(nsIHTMLAttributes),
(void**)&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 = nsComponentManager::CreateInstance(kHTMLAttributesCID, nsnull,
NS_GET_IID(nsIHTMLAttributes),
(void**)&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);
char* urlSpec = nsnull;
mURL->GetSpec(&urlSpec);
if (urlSpec) {
fputs(urlSpec, out);
nsCRT::free(urlSpec);
}
fputs("\n", out);
}
struct MappedAttributeSizeEnumData {
MappedAttributeSizeEnumData(nsISizeOfHandler *aSizeOfHandler,
nsUniqueStyleItems *aUniqueStyleItem)
{
aHandler = aSizeOfHandler;
uniqueItems = aUniqueStyleItem;
}
// weak references all 'round
nsISizeOfHandler *aHandler;
nsUniqueStyleItems *uniqueItems;
};
static
PRBool PR_CALLBACK MappedSizeAttributes(nsHashKey *aKey, void *aData, void* closure)
{
MappedAttributeSizeEnumData *pData = (MappedAttributeSizeEnumData *)closure;
NS_ASSERTION(pData,"null closure is not supported");
nsIHTMLMappedAttributes* mapped = (nsIHTMLMappedAttributes*)aData;
NS_ASSERTION(mapped, "null item in enumeration fcn is not supported");
// if there is an attribute and it has not been counted, the get its size
if(mapped){
PRUint32 size=0;
mapped->SizeOf(pData->aHandler, size);
}
return PR_TRUE;
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as HTMLStyleSheetImpl's size):
* 1) sizeof(*this)
*
* Contained / Aggregated data (not reported as HTMLStyleSheetImpl's size):
* 1) Not really delegated, but counted seperately:
* - mLinkRule
* - mVisitedRule
* - mActiveRule
* - mDocumentColorRule
* - mTableTHRule
* - mMappedAttrTable
* 2) Delegates (really) to the MappedAttributes in the mMappedAttrTable
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void HTMLStyleSheetImpl::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("HTMLStyleSheet"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(HTMLStyleSheetImpl);
aSizeOfHandler->AddSize(tag,aSize);
// now gather up the sizes of the data members
// - mLinkRule : sizeof object
// - mVisitedRule : sizeof object
// - mActiveRule : sizeof object
// - mDocumentColorRule : sizeof object
// - mTableTHRule : sizeof object
// - mMappedAttrTable
if(mLinkRule && uniqueItems->AddItem((void*)mLinkRule)){
localSize = sizeof(*mLinkRule);
tag = getter_AddRefs(NS_NewAtom("LinkRule"));
aSizeOfHandler->AddSize(tag,localSize);
}
if(mVisitedRule && uniqueItems->AddItem((void*)mVisitedRule)){
localSize = sizeof(*mVisitedRule);
tag = getter_AddRefs(NS_NewAtom("VisitedRule"));
aSizeOfHandler->AddSize(tag,localSize);
}
if(mActiveRule && uniqueItems->AddItem((void*)mActiveRule)){
localSize = sizeof(*mActiveRule);
tag = getter_AddRefs(NS_NewAtom("ActiveRule"));
aSizeOfHandler->AddSize(tag,localSize);
}
if(uniqueItems->AddItem((void*)mDocumentColorRule)){
localSize = sizeof(*mDocumentColorRule);
tag = getter_AddRefs(NS_NewAtom("DocumentColorRule"));
aSizeOfHandler->AddSize(tag,localSize);
}
if(uniqueItems->AddItem((void*)mTableTHRule)){
localSize = sizeof(*mTableTHRule);
tag = getter_AddRefs(NS_NewAtom("TableTHRule"));
aSizeOfHandler->AddSize(tag,localSize);
}
// for the AttrTable it is kindof sleezy:
// We want the hash table overhead as well as the entries it contains
//
// we get the overall size of the hashtable, and if there are entries,
// we calculate a rough overhead estimate as:
// number of entries X sizeof each hash-entry
// + the size of a hash table (see plhash.h and nsHashTable.h)
// then we add up the size of each unique attribute
localSize = sizeof(mMappedAttrTable);
if(mMappedAttrTable.Count() >0){
localSize += sizeof(PLHashTable);
localSize += mMappedAttrTable.Count() * sizeof(PLHashEntry);
}
tag = getter_AddRefs(NS_NewAtom("MappedAttrTable"));
aSizeOfHandler->AddSize(tag,localSize);
// now get each unique attribute
MappedAttributeSizeEnumData sizeEnumData(aSizeOfHandler, uniqueItems);
mMappedAttrTable.Enumerate(MappedSizeAttributes, &sizeEnumData);
// that's it
}
NS_IMETHODIMP
HTMLStyleSheetImpl::AttributeAffectsStyle(nsIAtom *aAttribute,
nsIContent *aContent,
PRBool &aAffects)
{
// XXX we should be checking to see if this is an href on an <A> being
// XXX tweaked, in which case we really want to restyle
aAffects = PR_FALSE;
return NS_OK;
}
// 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)
{
NS_PRECONDITION(aInstancePtrResult, "null out param");
HTMLStyleSheetImpl *it = new HTMLStyleSheetImpl();
if (!it) {
*aInstancePtrResult = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(it);
nsresult rv = it->Init();
if (NS_FAILED(rv))
NS_RELEASE(it);
*aInstancePtrResult = it; // NS_ADDREF above, or set to null by NS_RELEASE
return rv;
}
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