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pjs/layout/style/nsHTMLStyleSheet.cpp

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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 1.0 (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"
#include "nsISupportsArray.h"
#include "nsHashtable.h"
#include "nsIHTMLContent.h"
#include "nsIHTMLAttributes.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 HTMLAnchorRule : public nsIStyleRule {
public:
HTMLAnchorRule(nsIHTMLStyleSheet* aSheet);
~HTMLAnchorRule();
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 MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext);
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
nscolor mColor;
nsIHTMLStyleSheet* mSheet;
};
HTMLAnchorRule::HTMLAnchorRule(nsIHTMLStyleSheet* aSheet)
: mSheet(aSheet)
{
NS_INIT_REFCNT();
}
HTMLAnchorRule::~HTMLAnchorRule()
{
}
NS_IMPL_ISUPPORTS(HTMLAnchorRule, kIStyleRuleIID);
NS_IMETHODIMP
HTMLAnchorRule::Equals(const nsIStyleRule* aRule, PRBool& aResult) const
{
aResult = PRBool(this == aRule);
return NS_OK;
}
NS_IMETHODIMP
HTMLAnchorRule::HashValue(PRUint32& aValue) const
{
aValue = (PRUint32)(mColor);
return NS_OK;
}
NS_IMETHODIMP
HTMLAnchorRule::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
HTMLAnchorRule::GetStrength(PRInt32& aStrength) const
{
aStrength = 0;
return NS_OK;
}
NS_IMETHODIMP
HTMLAnchorRule::MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
{
nsStyleColor* styleColor = (nsStyleColor*)(aContext->GetMutableStyleData(eStyleStruct_Color));
if (nsnull != styleColor) {
styleColor->mColor = mColor;
}
return NS_OK;
}
NS_IMETHODIMP
HTMLAnchorRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
// -----------------------------------------------------------
class AttributeKey: public nsHashKey
{
public:
AttributeKey(nsMapAttributesFunc aMapFunc, nsIHTMLAttributes* 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:
nsMapAttributesFunc mMapFunc;
nsIHTMLAttributes* mAttributes;
PRUint32 mHashSet: 1;
PRUint32 mHashCode: 31;
};
AttributeKey::AttributeKey(nsMapAttributesFunc aMapFunc, nsIHTMLAttributes* aAttributes)
: mMapFunc(aMapFunc),
mAttributes(aAttributes)
{
NS_ADDREF(mAttributes);
mHashSet = 0;
mHashCode = 0;
}
AttributeKey::~AttributeKey(void)
{
NS_RELEASE(mAttributes);
}
PRBool AttributeKey::Equals(const nsHashKey* aOther) const
{
const AttributeKey* other = (const AttributeKey*)aOther;
if (mMapFunc == other->mMapFunc) {
PRBool equals;
mAttributes->Equals(other->mAttributes, equals);
return equals;
}
return PR_FALSE;
}
PRUint32 AttributeKey::HashValue(void) const
{
if (0 == mHashSet) {
AttributeKey* self = (AttributeKey*)this; // break const
PRUint32 hash;
mAttributes->HashValue(hash);
self->mHashCode = (0x7FFFFFFF & hash);
self->mHashCode |= (0x7FFFFFFF & PRUint32(mMapFunc));
self->mHashSet = 1;
}
return mHashCode;
}
nsHashKey* AttributeKey::Clone(void) const
{
AttributeKey* clown = new AttributeKey(mMapFunc, mAttributes);
if (nsnull != clown) {
clown->mHashSet = mHashSet;
clown->mHashCode = mHashCode;
}
return clown;
}
// -----------------------------------------------------------
class HTMLStyleSheetImpl : public nsIHTMLStyleSheet {
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(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* aDocumemt);
virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
NS_IMETHOD Init(nsIURL* aURL, nsIDocument* aDocument);
NS_IMETHOD Reset(nsIURL* aURL);
NS_IMETHOD SetLinkColor(nscolor aColor);
NS_IMETHOD SetActiveLinkColor(nscolor aColor);
NS_IMETHOD SetVisitedLinkColor(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,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes);
NS_IMETHOD SetAttributeFor(nsIAtom* aAttribute, const nsHTMLValue& aValue,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes);
NS_IMETHOD UnsetAttributeFor(nsIAtom* aAttribute, nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes);
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();
NS_IMETHOD EnsureSingleAttributes(nsIHTMLAttributes*& aAttributes,
nsMapAttributesFunc aMapFunc,
PRBool aCreate,
nsIHTMLAttributes*& aSingleAttrs);
NS_IMETHOD UniqueAttributes(nsIHTMLAttributes*& aSingleAttrs,
nsMapAttributesFunc aMapFunc,
PRInt32 aAttrCount,
nsIHTMLAttributes*& aAttributes);
protected:
PRUint32 mInHeap : 1;
PRUint32 mRefCnt : 31;
nsIURL* mURL;
nsIDocument* mDocument;
HTMLAnchorRule* mLinkRule;
HTMLAnchorRule* mVisitedRule;
HTMLAnchorRule* mActiveRule;
nsHashtable mAttrTable;
nsIHTMLAttributes* mRecycledAttrs;
};
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),
mRecycledAttrs(nsnull)
{
NS_INIT_REFCNT();
}
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);
}
NS_IF_RELEASE(mRecycledAttrs);
}
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(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;
}
PRInt32 HTMLStyleSheetImpl::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;
if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::IID(), (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)) &&
(nsnull != linkHandler)) {
nsAutoString base, href;
nsresult attrState = styledContent->GetAttribute(kNameSpaceID_None, nsHTMLAtoms::href, href);
if (NS_CONTENT_ATTR_HAS_VALUE == attrState) {
nsIURL* docURL = nsnull;
nsIHTMLContent* htmlContent;
if (NS_SUCCEEDED(styledContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent))) {
htmlContent->GetBaseURL(docURL);
nsAutoString absURLSpec;
nsresult rv = NS_MakeAbsoluteURL(docURL, base, href, absURLSpec);
NS_IF_RELEASE(docURL);
nsLinkState state;
if (NS_OK == linkHandler->GetLinkState(absURLSpec, state)) {
switch (state) {
case eLinkState_Unvisited:
if (nsnull != mLinkRule) {
aResults->AppendElement(mLinkRule);
matchCount++;
}
break;
case eLinkState_Visited:
if (nsnull != mVisitedRule) {
aResults->AppendElement(mVisitedRule);
matchCount++;
}
break;
}
}
NS_RELEASE(htmlContent);
}
}
}
NS_RELEASE(linkHandler);
} // end link/visited rules
if (nsnull != mActiveRule) { // test active state of link
nsIEventStateManager* eventStateManager;
if ((NS_OK == aPresContext->GetEventStateManager(&eventStateManager)) &&
(nsnull != eventStateManager)) {
nsLinkEventState state;
if (NS_OK == eventStateManager->GetLinkState(aContent, state)) {
if (0 != (state & eLinkState_Active)) {
aResults->AppendElement(mActiveRule);
matchCount++;
}
}
NS_RELEASE(eventStateManager);
}
} // end active rule
} // end A tag
NS_IF_RELEASE(tag);
} // end html namespace
// just get the one and only style rule from the content
nsIStyleRule* rule;
styledContent->GetContentStyleRule(rule);
if (nsnull != rule) {
aResults->AppendElement(rule);
NS_RELEASE(rule);
matchCount++;
}
NS_RELEASE(styledContent);
}
return matchCount;
}
PRInt32 HTMLStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
// no pseudo frame style
return 0;
}
// nsIStyleSheet api
NS_IMETHODIMP
HTMLStyleSheetImpl::GetURL(nsIURL*& 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::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(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 HTMLStyleSheetImpl::Reset(nsIURL* 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);
}
mAttrTable.Reset();
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetLinkColor(nscolor aColor)
{
if (nsnull == mLinkRule) {
mLinkRule = new HTMLAnchorRule(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 HTMLAnchorRule(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 HTMLAnchorRule(this);
if (nsnull == mVisitedRule) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mVisitedRule);
}
mVisitedRule->mColor = aColor;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributesFor(nsIHTMLContent* aContent, nsIHTMLAttributes*& aAttributes)
{
nsIHTMLAttributes* attrs = aAttributes;
if (nsnull != attrs) {
nsMapAttributesFunc mapFunc;
aContent->GetAttributeMappingFunction(mapFunc);
AttributeKey key(mapFunc, attrs);
nsIHTMLAttributes* sharedAttrs = (nsIHTMLAttributes*)mAttrTable.Get(&key);
if (nsnull == sharedAttrs) { // we have a new unique set
mAttrTable.Put(&key, attrs);
}
else { // found existing set
if (sharedAttrs != aAttributes) {
aAttributes->ReleaseContentRef();
NS_RELEASE(aAttributes); // release content's ref
aAttributes = sharedAttrs;
aAttributes->AddContentRef();
NS_ADDREF(aAttributes); // add ref for content
}
}
}
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributeFor(nsIAtom* aAttribute,
const nsString& aValue,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
nsIHTMLAttributes* attrs;
nsMapAttributesFunc mapFunc;
aContent->GetAttributeMappingFunction(mapFunc);
result = EnsureSingleAttributes(aAttributes, mapFunc, PR_TRUE, attrs);
if ((NS_OK == result) && (nsnull != attrs)) {
PRInt32 count;
attrs->SetAttribute(aAttribute, aValue, count);
result = UniqueAttributes(attrs, mapFunc, count, aAttributes);
}
return result;
}
#ifdef NS_DEBUG
#define NS_ASSERT_REFCOUNT(ptr,cnt,msg) { \
nsrefcnt count = ptr->AddRef(); \
ptr->Release(); \
NS_ASSERTION(--count == cnt, msg); \
}
#else
#define NS_ASSERT_REFCOUNT(ptr,cnt,msg) {}
#endif
NS_IMETHODIMP
HTMLStyleSheetImpl::EnsureSingleAttributes(nsIHTMLAttributes*& aAttributes,
nsMapAttributesFunc aMapFunc,
PRBool aCreate,
nsIHTMLAttributes*& aSingleAttrs)
{
nsresult result = NS_OK;
PRInt32 contentRefCount;
if (nsnull == aAttributes) {
if (PR_TRUE == aCreate) {
if (nsnull != mRecycledAttrs) {
NS_ASSERT_REFCOUNT(mRecycledAttrs, 1, "attributes used elsewhere");
aSingleAttrs = mRecycledAttrs;
mRecycledAttrs = nsnull;
aSingleAttrs->SetMappingFunction(aMapFunc);
}
else {
result = NS_NewHTMLAttributes(&aSingleAttrs, this, aMapFunc);
}
}
else {
aSingleAttrs = nsnull;
}
contentRefCount = 0;
}
else {
aSingleAttrs = aAttributes;
aSingleAttrs->GetContentRefCount(contentRefCount);
NS_ASSERTION(0 < contentRefCount, "bad content ref count");
}
if (NS_OK == result) {
if (1 < contentRefCount) { // already shared, copy it
result = aSingleAttrs->Clone(&aSingleAttrs);
if (NS_OK != result) {
aSingleAttrs = nsnull;
return result;
}
contentRefCount = 0;
aAttributes->ReleaseContentRef();
NS_RELEASE(aAttributes);
}
else { // one content ref, ok to use, remove from table because hash may change
if (1 == contentRefCount) {
AttributeKey key(aMapFunc, aSingleAttrs);
mAttrTable.Remove(&key);
NS_ADDREF(aSingleAttrs); // add a local ref so we match up
}
}
// at this point, content ref count is 0 or 1, and we hold a local ref
// attrs is also unique and not in the table
NS_ASSERTION(((0 == contentRefCount) && (nsnull == aAttributes)) ||
((1 == contentRefCount) && (aSingleAttrs == aAttributes)), "this is broken");
}
return result;
}
NS_IMETHODIMP
HTMLStyleSheetImpl::UniqueAttributes(nsIHTMLAttributes*& aSingleAttrs,
nsMapAttributesFunc aMapFunc,
PRInt32 aAttrCount,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
if (0 < aAttrCount) {
AttributeKey key(aMapFunc, aSingleAttrs);
nsIHTMLAttributes* sharedAttrs = (nsIHTMLAttributes*)mAttrTable.Get(&key);
if (nsnull == sharedAttrs) { // we have a new unique set
mAttrTable.Put(&key, aSingleAttrs);
if (aSingleAttrs != aAttributes) {
NS_ASSERTION(nsnull == aAttributes, "this is broken");
aAttributes = aSingleAttrs;
aAttributes->AddContentRef();
NS_ADDREF(aAttributes); // add ref for content
}
}
else { // found existing set
NS_ASSERTION (sharedAttrs != aAttributes, "should never happen");
if (nsnull != aAttributes) {
aAttributes->ReleaseContentRef();
NS_RELEASE(aAttributes); // release content's ref
}
aAttributes = sharedAttrs;
aAttributes->AddContentRef();
NS_ADDREF(aAttributes); // add ref for content
if (nsnull == mRecycledAttrs) {
mRecycledAttrs = aSingleAttrs;
NS_ADDREF(mRecycledAttrs);
mRecycledAttrs->Reset();
}
}
}
else { // no attributes to store
if (nsnull != aAttributes) {
aAttributes->ReleaseContentRef();
NS_RELEASE(aAttributes);
}
if ((nsnull != aSingleAttrs) && (nsnull == mRecycledAttrs)) {
mRecycledAttrs = aSingleAttrs;
NS_ADDREF(mRecycledAttrs);
mRecycledAttrs->Reset();
}
}
NS_IF_RELEASE(aSingleAttrs);
return result;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetAttributeFor(nsIAtom* aAttribute,
const nsHTMLValue& aValue,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
nsIHTMLAttributes* attrs;
PRBool hasValue = PRBool(eHTMLUnit_Null != aValue.GetUnit());
nsMapAttributesFunc mapFunc;
aContent->GetAttributeMappingFunction(mapFunc);
result = EnsureSingleAttributes(aAttributes, mapFunc, hasValue, attrs);
if ((NS_OK == result) && (nsnull != attrs)) {
PRInt32 count;
attrs->SetAttribute(aAttribute, aValue, count);
result = UniqueAttributes(attrs, mapFunc, count, aAttributes);
}
return result;
}
NS_IMETHODIMP HTMLStyleSheetImpl::UnsetAttributeFor(nsIAtom* aAttribute,
nsIHTMLContent* aContent,
nsIHTMLAttributes*& aAttributes)
{
nsresult result = NS_OK;
nsIHTMLAttributes* attrs;
nsMapAttributesFunc mapFunc;
aContent->GetAttributeMappingFunction(mapFunc);
result = EnsureSingleAttributes(aAttributes, mapFunc, PR_FALSE, attrs);
if ((NS_OK == result) && (nsnull != attrs)) {
PRInt32 count;
attrs->UnsetAttribute(aAttribute, count);
result = UniqueAttributes(attrs, mapFunc, count, aAttributes);
}
return result;
}
void HTMLStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
{
PRUnichar* buffer;
// Indent
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("HTML Style Sheet: ", out);
mURL->ToString(&buffer);
fputs(buffer, out);
fputs("\n", out);
delete buffer;
}
// XXX For convenience and backwards compatibility
NS_HTML nsresult
NS_NewHTMLStyleSheet(nsIHTMLStyleSheet** aInstancePtrResult, nsIURL* 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;
}
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