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gecko-dev/layout/style/nsCSSStyleSheet.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 1.1 (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):
*/
#include "nsICSSStyleSheet.h"
#include "nsIArena.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsIIOService.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsNetUtil.h"
static NS_DEFINE_CID(kIOServiceCID, NS_IOSERVICE_CID);
#include "nsISupportsArray.h"
#include "nsHashtable.h"
#include "nsICSSStyleRuleProcessor.h"
#include "nsICSSStyleRule.h"
#include "nsICSSNameSpaceRule.h"
#include "nsICSSMediaRule.h"
#include "nsIHTMLContent.h"
#include "nsIDocument.h"
#include "nsIPresContext.h"
#include "nsILinkHandler.h"
#include "nsIEventStateManager.h"
#include "nsHTMLAtoms.h"
#include "nsLayoutAtoms.h"
#include "nsIFrame.h"
#include "nsString.h"
#include "nsVoidArray.h"
#include "nsIPtr.h"
#include "nsHTMLIIDs.h"
#include "nsIDOMStyleSheetCollection.h"
#include "nsIDOMCSSStyleSheet.h"
#include "nsIDOMCSSStyleRule.h"
#include "nsIDOMCSSStyleRuleCollection.h"
#include "nsIDOMNode.h"
#include "nsIScriptObjectOwner.h"
#include "nsIScriptGlobalObject.h"
#include "nsICSSParser.h"
#include "nsCSSAtoms.h"
#include "nsINameSpaceManager.h"
#include "nsINameSpace.h"
#include "nsITextContent.h"
#include "prlog.h"
//#define DEBUG_RULES
static NS_DEFINE_IID(kICSSStyleSheetIID, NS_ICSS_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(kIDOMStyleSheetIID, NS_IDOMSTYLESHEET_IID);
static NS_DEFINE_IID(kIDOMCSSStyleSheetIID, NS_IDOMCSSSTYLESHEET_IID);
static NS_DEFINE_IID(kIDOMCSSStyleRuleIID, NS_IDOMCSSSTYLERULE_IID);
static NS_DEFINE_IID(kIDOMCSSStyleRuleCollectionIID, NS_IDOMCSSSTYLERULECOLLECTION_IID);
static NS_DEFINE_IID(kIDOMStyleSheetCollectionIID, NS_IDOMSTYLESHEETCOLLECTION_IID);
static NS_DEFINE_IID(kIScriptObjectOwnerIID, NS_ISCRIPTOBJECTOWNER_IID);
NS_DEF_PTR(nsIHTMLContent);
NS_DEF_PTR(nsIContent);
NS_DEF_PTR(nsIStyleRule);
NS_DEF_PTR(nsICSSStyleRule);
NS_DEF_PTR(nsIURI);
NS_DEF_PTR(nsISupportsArray);
NS_DEF_PTR(nsICSSStyleSheet);
// ----------------------
// Rule hash key
//
class AtomKey: public nsHashKey {
public:
AtomKey(nsIAtom* aAtom);
AtomKey(const AtomKey& aKey);
virtual ~AtomKey(void);
virtual PRUint32 HashValue(void) const;
virtual PRBool Equals(const nsHashKey *aKey) const;
virtual nsHashKey *Clone(void) const;
nsIAtom* mAtom;
};
AtomKey::AtomKey(nsIAtom* aAtom)
{
mAtom = aAtom;
NS_ADDREF(mAtom);
}
AtomKey::AtomKey(const AtomKey& aKey)
{
mAtom = aKey.mAtom;
NS_ADDREF(mAtom);
}
AtomKey::~AtomKey(void)
{
NS_RELEASE(mAtom);
}
PRUint32 AtomKey::HashValue(void) const
{
return (PRUint32)mAtom;
}
PRBool AtomKey::Equals(const nsHashKey* aKey) const
{
return PRBool (((AtomKey*)aKey)->mAtom == mAtom);
}
nsHashKey* AtomKey::Clone(void) const
{
return new AtomKey(*this);
}
struct RuleValue {
RuleValue(nsICSSStyleRule* aRule, PRInt32 aIndex)
{
mRule = aRule;
mIndex = aIndex;
mNext = nsnull;
}
~RuleValue(void)
{
if ((nsnull != mNext) && (nsnull != mNext->mNext)) {
delete mNext; // don't delete that last in the chain, it's shared
}
}
nsICSSStyleRule* mRule;
PRInt32 mIndex;
RuleValue* mNext;
};
// ------------------------------
// Rule hash table
//
// Enumerator callback function.
typedef void (*RuleEnumFunc)(nsICSSStyleRule* aRule, void *aData);
class RuleHash {
public:
RuleHash(void);
~RuleHash(void);
void AppendRule(nsICSSStyleRule* aRule);
void EnumerateAllRules(nsIAtom* aTag, nsIAtom* aID, const nsVoidArray& aClassList,
RuleEnumFunc aFunc, void* aData);
void EnumerateTagRules(nsIAtom* aTag,
RuleEnumFunc aFunc, void* aData);
protected:
void AppendRuleToTable(nsHashtable& aTable, nsIAtom* aAtom, nsICSSStyleRule* aRule);
PRInt32 mRuleCount;
nsHashtable mTagTable;
nsHashtable mIdTable;
nsHashtable mClassTable;
RuleValue** mEnumList;
PRInt32 mEnumListSize;
RuleValue mEndValue;
};
RuleHash::RuleHash(void)
: mRuleCount(0),
mTagTable(), mIdTable(), mClassTable(),
mEnumList(nsnull), mEnumListSize(0),
mEndValue(nsnull, -1)
{
}
static PRBool DeleteValue(nsHashKey* aKey, void* aValue, void* closure)
{
delete ((RuleValue*)aValue);
return PR_TRUE;
}
RuleHash::~RuleHash(void)
{
mTagTable.Enumerate(DeleteValue);
mIdTable.Enumerate(DeleteValue);
mClassTable.Enumerate(DeleteValue);
if (nsnull != mEnumList) {
delete [] mEnumList;
}
}
void RuleHash::AppendRuleToTable(nsHashtable& aTable, nsIAtom* aAtom, nsICSSStyleRule* aRule)
{
NS_ASSERTION(nsnull != aAtom, "null hash key");
AtomKey key(aAtom);
RuleValue* value = (RuleValue*)aTable.Get(&key);
if (nsnull == value) {
value = new RuleValue(aRule, mRuleCount++);
aTable.Put(&key, value);
value->mNext = &mEndValue;
}
else {
while (&mEndValue != value->mNext) {
value = value->mNext;
}
value->mNext = new RuleValue(aRule, mRuleCount++);
value->mNext->mNext = &mEndValue;
}
mEndValue.mIndex = mRuleCount;
}
void RuleHash::AppendRule(nsICSSStyleRule* aRule)
{
nsCSSSelector* selector = aRule->FirstSelector();
if (nsnull != selector->mID) {
AppendRuleToTable(mIdTable, selector->mID, aRule);
}
else if (nsnull != selector->mClassList) {
AppendRuleToTable(mClassTable, selector->mClassList->mAtom, aRule);
}
else if (nsnull != selector->mTag) {
AppendRuleToTable(mTagTable, selector->mTag, aRule);
}
else { // universal tag selector
AppendRuleToTable(mTagTable, nsCSSAtoms::universalSelector, aRule);
}
}
void RuleHash::EnumerateAllRules(nsIAtom* aTag, nsIAtom* aID, const nsVoidArray& aClassList,
RuleEnumFunc aFunc, void* aData)
{
PRInt32 classCount = aClassList.Count();
PRInt32 testCount = classCount + 1; // + 1 for universal selector
if (nsnull != aTag) {
testCount++;
}
if (nsnull != aID) {
testCount++;
}
if (mEnumListSize < testCount) {
delete [] mEnumList;
mEnumList = new RuleValue*[testCount];
mEnumListSize = testCount;
}
PRInt32 index;
PRInt32 valueCount = 0;
{ // universal tag rules
AtomKey universalKey(nsCSSAtoms::universalSelector);
RuleValue* value = (RuleValue*)mTagTable.Get(&universalKey);
if (nsnull != value) {
mEnumList[valueCount++] = value;
}
}
if (nsnull != aTag) {
AtomKey tagKey(aTag);
RuleValue* value = (RuleValue*)mTagTable.Get(&tagKey);
if (nsnull != value) {
mEnumList[valueCount++] = value;
}
}
if (nsnull != aID) {
AtomKey idKey(aID);
RuleValue* value = (RuleValue*)mIdTable.Get(&idKey);
if (nsnull != value) {
mEnumList[valueCount++] = value;
}
}
for (index = 0; index < classCount; index++) {
nsIAtom* classAtom = (nsIAtom*)aClassList.ElementAt(index);
AtomKey classKey(classAtom);
RuleValue* value = (RuleValue*)mClassTable.Get(&classKey);
if (nsnull != value) {
mEnumList[valueCount++] = value;
}
}
NS_ASSERTION(valueCount <= testCount, "values exceeded list size");
if (1 < valueCount) {
PRInt32 ruleIndex = mRuleCount;
PRInt32 valueIndex = -1;
for (index = 0; index < valueCount; index++) {
if (mEnumList[index]->mIndex < ruleIndex) {
ruleIndex = mEnumList[index]->mIndex;
valueIndex = index;
}
}
do {
(*aFunc)(mEnumList[valueIndex]->mRule, aData);
mEnumList[valueIndex] = mEnumList[valueIndex]->mNext;
ruleIndex = mEnumList[valueIndex]->mIndex;
for (index = 0; index < valueCount; index++) {
if (mEnumList[index]->mIndex < ruleIndex) {
ruleIndex = mEnumList[index]->mIndex;
valueIndex = index;
}
}
} while (ruleIndex < mRuleCount);
}
else if (0 < valueCount) { // fast loop over single value
RuleValue* value = mEnumList[0];
do {
(*aFunc)(value->mRule, aData);
value = value->mNext;
} while (&mEndValue != value);
}
}
void RuleHash::EnumerateTagRules(nsIAtom* aTag, RuleEnumFunc aFunc, void* aData)
{
AtomKey tagKey(aTag);
AtomKey universalKey(nsCSSAtoms::universalSelector);
RuleValue* tagValue = (RuleValue*)mTagTable.Get(&tagKey);
RuleValue* uniValue = (RuleValue*)mTagTable.Get(&universalKey);
if (nsnull == tagValue) {
if (nsnull != uniValue) {
do {
(*aFunc)(uniValue->mRule, aData);
uniValue = uniValue->mNext;
} while (&mEndValue != uniValue);
}
}
else {
if (nsnull == uniValue) {
do {
(*aFunc)(tagValue->mRule, aData);
tagValue = tagValue->mNext;
} while (&mEndValue != tagValue);
}
else {
do {
if (tagValue->mIndex < uniValue->mIndex) {
(*aFunc)(tagValue->mRule, aData);
tagValue = tagValue->mNext;
}
else {
(*aFunc)(uniValue->mRule, aData);
uniValue = uniValue->mNext;
}
} while ((&mEndValue != tagValue) || (&mEndValue != uniValue));
}
}
}
//--------------------------------
struct RuleCascadeData {
RuleCascadeData(void)
: mWeightedRules(nsnull),
mRuleHash(),
mStateSelectors()
{
NS_NewISupportsArray(&mWeightedRules);
}
~RuleCascadeData(void)
{
NS_IF_RELEASE(mWeightedRules);
}
nsISupportsArray* mWeightedRules;
RuleHash mRuleHash;
nsVoidArray mStateSelectors;
};
// -------------------------------
// CSS Style Rule processor
//
class CSSRuleProcessor: public nsICSSStyleRuleProcessor {
public:
CSSRuleProcessor(void);
virtual ~CSSRuleProcessor(void);
NS_DECL_ISUPPORTS
public:
// nsICSSStyleRuleProcessor
NS_IMETHOD AppendStyleSheet(nsICSSStyleSheet* aStyleSheet);
NS_IMETHOD ClearRuleCascades(void);
// nsIStyleRuleProcessor
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);
protected:
RuleCascadeData* GetRuleCascade(nsIAtom* aMedium);
static PRBool CascadeSheetRulesInto(nsISupports* aSheet, void* aData);
nsISupportsArray* mSheets;
nsHashtable* mMediumCascadeTable;
};
// -------------------------------
// CSS Style Sheet Inner Data Container
//
class CSSStyleSheetInner {
public:
CSSStyleSheetInner(nsICSSStyleSheet* aParentSheet);
CSSStyleSheetInner(CSSStyleSheetInner& aCopy, nsICSSStyleSheet* aParentSheet);
virtual ~CSSStyleSheetInner(void);
virtual CSSStyleSheetInner* CloneFor(nsICSSStyleSheet* aParentSheet);
virtual void AddSheet(nsICSSStyleSheet* aParentSheet);
virtual void RemoveSheet(nsICSSStyleSheet* aParentSheet);
virtual void RebuildNameSpaces(void);
nsVoidArray mSheets;
nsIURI* mURL;
nsISupportsArray* mOrderedRules;
nsINameSpace* mNameSpace;
PRInt32 mDefaultNameSpaceID;
};
// -------------------------------
// CSS Style Sheet
//
class CSSImportsCollectionImpl;
class CSSStyleRuleCollectionImpl;
class CSSStyleSheetImpl : public nsICSSStyleSheet,
public nsIDOMCSSStyleSheet,
public nsIScriptObjectOwner {
public:
void* operator new(size_t size);
void* operator new(size_t size, nsIArena* aArena);
void operator delete(void* ptr);
CSSStyleSheetImpl();
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);
NS_IMETHOD GetURL(nsIURI*& aURL) const;
NS_IMETHOD GetTitle(nsString& aTitle) const;
NS_IMETHOD SetTitle(const nsString& aTitle);
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 AppendMedium(nsIAtom* aMedium);
NS_IMETHOD ClearMedia(void);
NS_IMETHOD GetEnabled(PRBool& aEnabled) const;
NS_IMETHOD SetEnabled(PRBool aEnabled);
// style sheet owner info
NS_IMETHOD GetParentSheet(nsIStyleSheet*& aParent) const; // may be null
NS_IMETHOD GetOwningDocument(nsIDocument*& aDocument) const;
NS_IMETHOD SetOwningDocument(nsIDocument* aDocument);
NS_IMETHOD SetOwningNode(nsIDOMNode* aOwningNode);
NS_IMETHOD GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* aPrevProcessor);
NS_IMETHOD DropRuleProcessorReference(nsICSSStyleRuleProcessor* aProcessor);
NS_IMETHOD ContainsStyleSheet(nsIURI* aURL) const;
NS_IMETHOD AppendStyleSheet(nsICSSStyleSheet* aSheet);
NS_IMETHOD InsertStyleSheetAt(nsICSSStyleSheet* aSheet, PRInt32 aIndex);
// XXX do these belong here or are they generic?
NS_IMETHOD PrependStyleRule(nsICSSRule* aRule);
NS_IMETHOD AppendStyleRule(nsICSSRule* aRule);
NS_IMETHOD StyleRuleCount(PRInt32& aCount) const;
NS_IMETHOD GetStyleRuleAt(PRInt32 aIndex, nsICSSRule*& aRule) const;
NS_IMETHOD StyleSheetCount(PRInt32& aCount) const;
NS_IMETHOD GetStyleSheetAt(PRInt32 aIndex, nsICSSStyleSheet*& aSheet) const;
NS_IMETHOD GetNameSpace(nsINameSpace*& aNameSpace) const;
NS_IMETHOD SetDefaultNameSpaceID(PRInt32 aDefaultNameSpaceID);
NS_IMETHOD Clone(nsICSSStyleSheet*& aClone) const;
NS_IMETHOD IsUnmodified(void) const;
NS_IMETHOD SetModified(PRBool aModified);
nsresult EnsureUniqueInner(void);
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
// nsIDOMStyleSheet interface
NS_IMETHOD GetType(nsString& aType);
NS_IMETHOD GetDisabled(PRBool* aDisabled);
NS_IMETHOD SetDisabled(PRBool aDisabled);
NS_IMETHOD GetReadOnly(PRBool* aReadOnly);
// nsIDOMCSSStyleSheet interface
NS_IMETHOD GetOwningNode(nsIDOMNode** aOwningNode);
NS_IMETHOD GetParentStyleSheet(nsIDOMStyleSheet** aParentStyleSheet);
NS_IMETHOD GetHref(nsString& aHref);
NS_IMETHOD GetTitle(nsString& aTitle);
NS_IMETHOD GetMedia(nsString& aMedia);
NS_IMETHOD GetCssRules(nsIDOMCSSStyleRuleCollection** aCssRules);
NS_IMETHOD InsertRule(const nsString& aRule, PRUint32 aIndex, PRUint32* aReturn);
NS_IMETHOD DeleteRule(PRUint32 aIndex);
// nsIScriptObjectOwner interface
NS_IMETHOD GetScriptObject(nsIScriptContext *aContext, void** aScriptObject);
NS_IMETHOD SetScriptObject(void* aScriptObject);
private:
// These are not supported and are not implemented!
CSSStyleSheetImpl(const CSSStyleSheetImpl& aCopy);
CSSStyleSheetImpl& operator=(const CSSStyleSheetImpl& aCopy);
protected:
virtual ~CSSStyleSheetImpl();
void ClearRuleCascades(void);
nsresult WillDirty(void);
void DidDirty(void);
protected:
PRUint32 mInHeap : 1;
PRUint32 mRefCnt : 31;
nsString mTitle;
nsISupportsArray* mMedia;
CSSStyleSheetImpl* mFirstChild;
CSSStyleSheetImpl* mNext;
nsICSSStyleSheet* mParent;
CSSImportsCollectionImpl* mImportsCollection;
CSSStyleRuleCollectionImpl* mRuleCollection;
nsIDocument* mDocument;
nsIDOMNode* mOwningNode;
PRBool mDisabled;
PRBool mDirty; // has been modified
void* mScriptObject;
CSSStyleSheetInner* mInner;
nsVoidArray* mRuleProcessors;
friend class CSSRuleProcessor;
};
// -------------------------------
// Style Rule Collection for the DOM
//
class CSSStyleRuleCollectionImpl : public nsIDOMCSSStyleRuleCollection,
public nsIScriptObjectOwner
{
public:
CSSStyleRuleCollectionImpl(CSSStyleSheetImpl *aStyleSheet);
NS_DECL_ISUPPORTS
// nsIDOMCSSStyleRuleCollection interface
NS_IMETHOD GetLength(PRUint32* aLength);
NS_IMETHOD Item(PRUint32 aIndex, nsIDOMCSSStyleRule** aReturn);
// nsIScriptObjectOwner interface
NS_IMETHOD GetScriptObject(nsIScriptContext *aContext, void** aScriptObject);
NS_IMETHOD SetScriptObject(void* aScriptObject);
void DropReference() { mStyleSheet = nsnull; }
protected:
virtual ~CSSStyleRuleCollectionImpl();
CSSStyleSheetImpl* mStyleSheet;
void* mScriptObject;
public:
PRBool mRulesAccessed;
};
CSSStyleRuleCollectionImpl::CSSStyleRuleCollectionImpl(CSSStyleSheetImpl *aStyleSheet)
{
NS_INIT_REFCNT();
// Not reference counted to avoid circular references.
// The style sheet will tell us when its going away.
mStyleSheet = aStyleSheet;
mScriptObject = nsnull;
mRulesAccessed = PR_FALSE;
}
CSSStyleRuleCollectionImpl::~CSSStyleRuleCollectionImpl()
{
}
NS_IMPL_ADDREF(CSSStyleRuleCollectionImpl);
NS_IMPL_RELEASE(CSSStyleRuleCollectionImpl);
nsresult
CSSStyleRuleCollectionImpl::QueryInterface(REFNSIID aIID, void** aInstancePtrResult)
{
if (NULL == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
if (aIID.Equals(kIDOMCSSStyleRuleCollectionIID)) {
nsIDOMCSSStyleRuleCollection *tmp = this;
*aInstancePtrResult = (void*) tmp;
AddRef();
return NS_OK;
}
if (aIID.Equals(kIScriptObjectOwnerIID)) {
nsIScriptObjectOwner *tmp = this;
*aInstancePtrResult = (void*) tmp;
AddRef();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
nsIDOMCSSStyleRuleCollection *tmp = this;
nsISupports *tmp2 = tmp;
*aInstancePtrResult = (void*) tmp2;
AddRef();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
CSSStyleRuleCollectionImpl::GetLength(PRUint32* aLength)
{
if (nsnull != mStyleSheet) {
PRInt32 count;
mStyleSheet->StyleRuleCount(count);
*aLength = (PRUint32)count;
}
else {
*aLength = 0;
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleRuleCollectionImpl::Item(PRUint32 aIndex, nsIDOMCSSStyleRule** aReturn)
{
nsresult result = NS_OK;
*aReturn = nsnull;
if (nsnull != mStyleSheet) {
result = mStyleSheet->EnsureUniqueInner(); // needed to ensure rules have correct parent
if (NS_SUCCEEDED(result)) {
nsICSSRule *rule;
result = mStyleSheet->GetStyleRuleAt(aIndex, rule);
if (NS_OK == result) {
result = rule->QueryInterface(kIDOMCSSStyleRuleIID, (void **)aReturn);
mRulesAccessed = PR_TRUE; // signal to never share rules again
}
NS_RELEASE(rule);
}
}
return result;
}
NS_IMETHODIMP
CSSStyleRuleCollectionImpl::GetScriptObject(nsIScriptContext *aContext,
void** aScriptObject)
{
nsresult res = NS_OK;
if (nsnull == mScriptObject) {
nsISupports *supports = (nsISupports *)(nsIDOMCSSStyleRuleCollection *)this;
// XXX Should be done through factory
res = NS_NewScriptCSSStyleRuleCollection(aContext,
supports,
(nsISupports *)(nsICSSStyleSheet*)mStyleSheet,
(void**)&mScriptObject);
}
*aScriptObject = mScriptObject;
return res;
}
NS_IMETHODIMP
CSSStyleRuleCollectionImpl::SetScriptObject(void* aScriptObject)
{
mScriptObject = aScriptObject;
return NS_OK;
}
// -------------------------------
// Imports Collection for the DOM
//
class CSSImportsCollectionImpl : public nsIDOMStyleSheetCollection,
public nsIScriptObjectOwner
{
public:
CSSImportsCollectionImpl(nsICSSStyleSheet *aStyleSheet);
NS_DECL_ISUPPORTS
// nsIDOMCSSStyleSheetCollection interface
NS_IMETHOD GetLength(PRUint32* aLength);
NS_IMETHOD Item(PRUint32 aIndex, nsIDOMStyleSheet** aReturn);
// nsIScriptObjectOwner interface
NS_IMETHOD GetScriptObject(nsIScriptContext *aContext, void** aScriptObject);
NS_IMETHOD SetScriptObject(void* aScriptObject);
void DropReference() { mStyleSheet = nsnull; }
protected:
virtual ~CSSImportsCollectionImpl();
nsICSSStyleSheet* mStyleSheet;
void* mScriptObject;
};
CSSImportsCollectionImpl::CSSImportsCollectionImpl(nsICSSStyleSheet *aStyleSheet)
{
NS_INIT_REFCNT();
// Not reference counted to avoid circular references.
// The style sheet will tell us when its going away.
mStyleSheet = aStyleSheet;
mScriptObject = nsnull;
}
CSSImportsCollectionImpl::~CSSImportsCollectionImpl()
{
}
NS_IMPL_ADDREF(CSSImportsCollectionImpl);
NS_IMPL_RELEASE(CSSImportsCollectionImpl);
nsresult
CSSImportsCollectionImpl::QueryInterface(REFNSIID aIID, void** aInstancePtrResult)
{
if (NULL == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
if (aIID.Equals(kIDOMStyleSheetCollectionIID)) {
nsIDOMStyleSheetCollection *tmp = this;
*aInstancePtrResult = (void*) tmp;
AddRef();
return NS_OK;
}
if (aIID.Equals(kIScriptObjectOwnerIID)) {
nsIScriptObjectOwner *tmp = this;
*aInstancePtrResult = (void*) tmp;
AddRef();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
nsIDOMStyleSheetCollection *tmp = this;
nsISupports *tmp2 = tmp;
*aInstancePtrResult = (void*) tmp2;
AddRef();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
CSSImportsCollectionImpl::GetLength(PRUint32* aLength)
{
if (nsnull != mStyleSheet) {
PRInt32 count;
mStyleSheet->StyleSheetCount(count);
*aLength = (PRUint32)count;
}
else {
*aLength = 0;
}
return NS_OK;
}
NS_IMETHODIMP
CSSImportsCollectionImpl::Item(PRUint32 aIndex, nsIDOMStyleSheet** aReturn)
{
nsresult result = NS_OK;
*aReturn = nsnull;
if (nsnull != mStyleSheet) {
nsICSSStyleSheet *sheet;
result = mStyleSheet->GetStyleSheetAt(aIndex, sheet);
if (NS_OK == result) {
result = sheet->QueryInterface(kIDOMStyleSheetIID, (void **)aReturn);
}
NS_RELEASE(sheet);
}
return result;
}
NS_IMETHODIMP
CSSImportsCollectionImpl::GetScriptObject(nsIScriptContext *aContext,
void** aScriptObject)
{
nsresult res = NS_OK;
if (nsnull == mScriptObject) {
nsISupports *supports = (nsISupports *)(nsIDOMStyleSheetCollection *)this;
// XXX Should be done through factory
res = NS_NewScriptStyleSheetCollection(aContext,
supports,
(nsISupports *)mStyleSheet,
(void**)&mScriptObject);
}
*aScriptObject = mScriptObject;
return res;
}
NS_IMETHODIMP
CSSImportsCollectionImpl::SetScriptObject(void* aScriptObject)
{
mScriptObject = aScriptObject;
return NS_OK;
}
// -------------------------------
// CSS Style Sheet Inner Data Container
//
static PRBool SetStyleSheetReference(nsISupports* aElement, void* aSheet)
{
nsICSSRule* rule = (nsICSSRule*)aElement;
if (nsnull != rule) {
rule->SetStyleSheet((nsICSSStyleSheet*)aSheet);
}
return PR_TRUE;
}
CSSStyleSheetInner::CSSStyleSheetInner(nsICSSStyleSheet* aParentSheet)
: mSheets(),
mURL(nsnull),
mOrderedRules(nsnull),
mNameSpace(nsnull),
mDefaultNameSpaceID(kNameSpaceID_None)
{
MOZ_COUNT_CTOR(CSSStyleSheetInner);
mSheets.AppendElement(aParentSheet);
}
static PRBool
CloneRuleInto(nsISupports* aRule, void* aArray)
{
nsICSSRule* rule = (nsICSSRule*)aRule;
nsICSSRule* clone = nsnull;
rule->Clone(clone);
if (clone) {
nsISupportsArray* array = (nsISupportsArray*)aArray;
array->AppendElement(clone);
NS_RELEASE(clone);
}
return PR_TRUE;
}
CSSStyleSheetInner::CSSStyleSheetInner(CSSStyleSheetInner& aCopy,
nsICSSStyleSheet* aParentSheet)
: mSheets(),
mURL(aCopy.mURL),
mNameSpace(nsnull),
mDefaultNameSpaceID(aCopy.mDefaultNameSpaceID)
{
MOZ_COUNT_CTOR(CSSStyleSheetInner);
mSheets.AppendElement(aParentSheet);
NS_IF_ADDREF(mURL);
if (aCopy.mOrderedRules) {
NS_NewISupportsArray(&mOrderedRules);
if (mOrderedRules) {
aCopy.mOrderedRules->EnumerateForwards(CloneRuleInto, mOrderedRules);
mOrderedRules->EnumerateForwards(SetStyleSheetReference, aParentSheet);
}
}
else {
mOrderedRules = nsnull;
}
RebuildNameSpaces();
}
CSSStyleSheetInner::~CSSStyleSheetInner(void)
{
MOZ_COUNT_DTOR(CSSStyleSheetInner);
NS_IF_RELEASE(mURL);
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(SetStyleSheetReference, nsnull);
NS_RELEASE(mOrderedRules);
}
NS_IF_RELEASE(mNameSpace);
}
CSSStyleSheetInner*
CSSStyleSheetInner::CloneFor(nsICSSStyleSheet* aParentSheet)
{
return new CSSStyleSheetInner(*this, aParentSheet);
}
void
CSSStyleSheetInner::AddSheet(nsICSSStyleSheet* aParentSheet)
{
mSheets.AppendElement(aParentSheet);
}
void
CSSStyleSheetInner::RemoveSheet(nsICSSStyleSheet* aParentSheet)
{
if (1 == mSheets.Count()) {
NS_ASSERTION(aParentSheet == (nsICSSStyleSheet*)mSheets.ElementAt(0), "bad parent");
delete this;
return;
}
if (aParentSheet == (nsICSSStyleSheet*)mSheets.ElementAt(0)) {
mSheets.RemoveElementAt(0);
NS_ASSERTION(mSheets.Count(), "no parents");
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(SetStyleSheetReference,
(nsICSSStyleSheet*)mSheets.ElementAt(0));
}
}
else {
mSheets.RemoveElement(aParentSheet);
}
}
static PRBool
CreateNameSpace(nsISupports* aRule, void* aNameSpacePtr)
{
nsICSSRule* rule = (nsICSSRule*)aRule;
PRInt32 type;
rule->GetType(type);
if (nsICSSRule::NAMESPACE_RULE == type) {
nsICSSNameSpaceRule* nameSpaceRule = (nsICSSNameSpaceRule*)rule;
nsINameSpace** nameSpacePtr = (nsINameSpace**)aNameSpacePtr;
nsINameSpace* lastNameSpace = *nameSpacePtr;
nsINameSpace* newNameSpace;
nsIAtom* prefix = nsnull;
nsAutoString urlSpec;
nameSpaceRule->GetPrefix(prefix);
nameSpaceRule->GetURLSpec(urlSpec);
lastNameSpace->CreateChildNameSpace(prefix, urlSpec, newNameSpace);
NS_IF_RELEASE(prefix);
if (newNameSpace) {
NS_RELEASE(lastNameSpace);
(*nameSpacePtr) = newNameSpace; // takes ref
}
return PR_TRUE;
}
// stop if not namespace, import or charset because namespace can't follow anything else
return (((nsICSSRule::CHARSET_RULE == type) ||
(nsICSSRule::IMPORT_RULE)) ? PR_TRUE : PR_FALSE);
}
void
CSSStyleSheetInner::RebuildNameSpaces(void)
{
nsINameSpaceManager* nameSpaceMgr;
if (mNameSpace) {
mNameSpace->GetNameSpaceManager(nameSpaceMgr);
NS_RELEASE(mNameSpace);
}
else {
NS_NewNameSpaceManager(&nameSpaceMgr);
}
if (nameSpaceMgr) {
nameSpaceMgr->CreateRootNameSpace(mNameSpace);
if (kNameSpaceID_Unknown != mDefaultNameSpaceID) {
nsINameSpace* defaultNameSpace;
mNameSpace->CreateChildNameSpace(nsnull, mDefaultNameSpaceID, defaultNameSpace);
if (defaultNameSpace) {
NS_RELEASE(mNameSpace);
mNameSpace = defaultNameSpace;
}
}
NS_RELEASE(nameSpaceMgr);
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(CreateNameSpace, &mNameSpace);
}
}
}
// -------------------------------
// CSS Style Sheet
//
void* CSSStyleSheetImpl::operator new(size_t size)
{
CSSStyleSheetImpl* rv = (CSSStyleSheetImpl*) ::operator new(size);
#ifdef NS_DEBUG
if (nsnull != rv) {
nsCRT::memset(rv, 0xEE, size);
}
#endif
rv->mInHeap = 1;
return (void*) rv;
}
void* CSSStyleSheetImpl::operator new(size_t size, nsIArena* aArena)
{
CSSStyleSheetImpl* rv = (CSSStyleSheetImpl*) aArena->Alloc(PRInt32(size));
#ifdef NS_DEBUG
if (nsnull != rv) {
nsCRT::memset(rv, 0xEE, size);
}
#endif
rv->mInHeap = 0;
return (void*) rv;
}
void CSSStyleSheetImpl::operator delete(void* ptr)
{
CSSStyleSheetImpl* sheet = (CSSStyleSheetImpl*) ptr;
if (nsnull != sheet) {
if (sheet->mInHeap) {
::operator delete(ptr);
}
}
}
MOZ_DECL_CTOR_COUNTER(CSSStyleSheetImpl);
CSSStyleSheetImpl::CSSStyleSheetImpl()
: nsICSSStyleSheet(),
mTitle(),
mMedia(nsnull),
mFirstChild(nsnull),
mNext(nsnull),
mParent(nsnull),
mImportsCollection(nsnull),
mRuleCollection(nsnull),
mDocument(nsnull),
mOwningNode(nsnull),
mDisabled(PR_FALSE),
mDirty(PR_FALSE),
mScriptObject(nsnull),
mRuleProcessors(nsnull)
{
NS_INIT_REFCNT();
mInner = new CSSStyleSheetInner(this);
}
CSSStyleSheetImpl::CSSStyleSheetImpl(const CSSStyleSheetImpl& aCopy)
: nsICSSStyleSheet(),
mTitle(aCopy.mTitle),
mMedia(nsnull),
mFirstChild(nsnull),
mNext(nsnull),
mParent(aCopy.mParent),
mImportsCollection(nsnull), // re-created lazily
mRuleCollection(nsnull), // re-created lazily
mDocument(aCopy.mDocument),
mOwningNode(aCopy.mOwningNode),
mDisabled(aCopy.mDisabled),
mDirty(PR_FALSE),
mScriptObject(nsnull),
mInner(aCopy.mInner),
mRuleProcessors(nsnull)
{
NS_INIT_REFCNT();
mInner->AddSheet(this);
if (aCopy.mRuleCollection &&
aCopy.mRuleCollection->mRulesAccessed) { // CSSOM's been there, force full copy now
EnsureUniqueInner();
}
if (aCopy.mMedia) {
NS_NewISupportsArray(&mMedia);
if (mMedia) {
mMedia->AppendElements(aCopy.mMedia);
}
}
if (aCopy.mFirstChild) {
CSSStyleSheetImpl* otherChild = aCopy.mFirstChild;
CSSStyleSheetImpl** ourSlot = &mFirstChild;
do {
CSSStyleSheetImpl* child = new CSSStyleSheetImpl(*otherChild);
if (child) {
NS_ADDREF(child);
(*ourSlot) = child;
ourSlot = &(child->mNext);
}
otherChild = otherChild->mNext;
}
while (otherChild && ourSlot);
}
}
CSSStyleSheetImpl::~CSSStyleSheetImpl()
{
NS_IF_RELEASE(mMedia);
if (mFirstChild) {
CSSStyleSheetImpl* child = mFirstChild;
do {
child->mParent = nsnull;
child = child->mNext;
} while (child);
NS_RELEASE(mFirstChild);
}
NS_IF_RELEASE(mNext);
if (nsnull != mRuleCollection) {
mRuleCollection->DropReference();
NS_RELEASE(mRuleCollection);
}
if (nsnull != mImportsCollection) {
mImportsCollection->DropReference();
NS_RELEASE(mImportsCollection);
}
mInner->RemoveSheet(this);
// XXX The document reference is not reference counted and should
// not be released. The document will let us know when it is going
// away.
if (mRuleProcessors) {
NS_ASSERTION(mRuleProcessors->Count() == 0, "destucting sheet with rule processor reference");
delete mRuleProcessors; // weak refs, should be empty here anyway
}
}
NS_IMPL_ADDREF(CSSStyleSheetImpl)
NS_IMPL_RELEASE(CSSStyleSheetImpl)
nsresult CSSStyleSheetImpl::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(kICSSStyleSheetIID)) {
*aInstancePtrResult = (void*) ((nsICSSStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIStyleSheetIID)) {
*aInstancePtrResult = (void*) ((nsIStyleSheet*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIDOMStyleSheetIID)) {
nsIDOMStyleSheet *tmp = this;
*aInstancePtrResult = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIDOMCSSStyleSheetIID)) {
nsIDOMCSSStyleSheet *tmp = this;
*aInstancePtrResult = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIScriptObjectOwnerIID)) {
nsIScriptObjectOwner *tmp = this;
*aInstancePtrResult = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
nsICSSStyleSheet *tmp = this;
nsISupports *tmp2 = tmp;
*aInstancePtrResult = (void*) tmp2;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* aPrevProcessor)
{
nsresult result = NS_OK;
nsICSSStyleRuleProcessor* cssProcessor = nsnull;
if (aPrevProcessor) {
result = aPrevProcessor->QueryInterface(nsICSSStyleRuleProcessor::GetIID(), (void**)&cssProcessor);
}
if (! cssProcessor) {
CSSRuleProcessor* processor = new CSSRuleProcessor();
if (processor) {
result = processor->QueryInterface(nsICSSStyleRuleProcessor::GetIID(), (void**)&cssProcessor);
if (NS_FAILED(result)) {
delete processor;
cssProcessor = nsnull;
}
}
else {
result = NS_ERROR_OUT_OF_MEMORY;
}
}
if (NS_SUCCEEDED(result) && cssProcessor) {
cssProcessor->AppendStyleSheet(this);
if (! mRuleProcessors) {
mRuleProcessors = new nsVoidArray();
}
if (mRuleProcessors) {
NS_ASSERTION(-1 == mRuleProcessors->IndexOf(cssProcessor), "processor already registered");
mRuleProcessors->AppendElement(cssProcessor); // weak ref
}
}
aProcessor = cssProcessor;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::DropRuleProcessorReference(nsICSSStyleRuleProcessor* aProcessor)
{
NS_ASSERTION(mRuleProcessors, "no rule processors registered");
if (mRuleProcessors) {
NS_ASSERTION(-1 != mRuleProcessors->IndexOf(aProcessor), "not a registered processor");
mRuleProcessors->RemoveElement(aProcessor);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::Init(nsIURI* aURL)
{
NS_PRECONDITION(aURL, "null ptr");
if (! aURL)
return NS_ERROR_NULL_POINTER;
if (! mInner) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ASSERTION(! mInner->mURL, "already initialized");
if (mInner->mURL)
return NS_ERROR_ALREADY_INITIALIZED;
if (mInner->mURL) {
#ifdef DEBUG
PRBool eq;
nsresult rv = mInner->mURL->Equals(aURL, &eq);
NS_ASSERTION(NS_SUCCEEDED(rv) && eq, "bad inner");
#endif
}
else {
mInner->mURL = aURL;
NS_ADDREF(mInner->mURL);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetURL(nsIURI*& aURL) const
{
const nsIURI* url = ((mInner) ? mInner->mURL : nsnull);
aURL = (nsIURI*)url;
NS_IF_ADDREF(aURL);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetTitle(nsString& aTitle) const
{
aTitle = mTitle;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetTitle(const nsString& aTitle)
{
mTitle = aTitle;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetType(nsString& aType) const
{
aType.Truncate();
aType.Append("text/css");
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetMediumCount(PRInt32& aCount) const
{
if (mMedia) {
PRUint32 cnt;
nsresult rv = mMedia->Count(&cnt);
if (NS_FAILED(rv)) return rv;
aCount = cnt;
}
else
aCount = 0;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const
{
nsIAtom* medium = nsnull;
if (nsnull != mMedia) {
medium = (nsIAtom*)mMedia->ElementAt(aIndex);
}
if (nsnull != medium) {
aMedium = medium;
return NS_OK;
}
aMedium = nsnull;
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
CSSStyleSheetImpl::UseForMedium(nsIAtom* aMedium) const
{
if (mMedia) {
if (-1 != mMedia->IndexOf(aMedium)) {
return NS_OK;
}
if (-1 != mMedia->IndexOf(nsLayoutAtoms::all)) {
return NS_OK;
}
return NS_COMFALSE;
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::AppendMedium(nsIAtom* aMedium)
{
nsresult result = NS_OK;
if (nsnull == mMedia) {
result = NS_NewISupportsArray(&mMedia);
}
if (NS_SUCCEEDED(result) && (nsnull != mMedia)) {
mMedia->AppendElement(aMedium);
}
return result;
}
NS_IMETHODIMP
CSSStyleSheetImpl::ClearMedia(void)
{
if (mMedia) {
mMedia->Clear();
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetEnabled(PRBool& aEnabled) const
{
aEnabled = ((PR_TRUE == mDisabled) ? PR_FALSE : PR_TRUE);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetEnabled(PRBool aEnabled)
{
PRBool oldState = mDisabled;
mDisabled = ((PR_TRUE == aEnabled) ? PR_FALSE : PR_TRUE);
if ((nsnull != mDocument) && (mDisabled != oldState)) {
mDocument->SetStyleSheetDisabledState(this, mDisabled);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetParentSheet(nsIStyleSheet*& aParent) const
{
NS_IF_ADDREF(mParent);
aParent = mParent;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetOwningDocument(nsIDocument*& aDocument) const
{
nsIDocument* doc = mDocument;
CSSStyleSheetImpl* parent = (CSSStyleSheetImpl*)mParent;
while ((nsnull == doc) && (nsnull != parent)) {
doc = parent->mDocument;
parent = (CSSStyleSheetImpl*)(parent->mParent);
}
NS_IF_ADDREF(doc);
aDocument = doc;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetOwningDocument(nsIDocument* aDocument)
{ // not ref counted
mDocument = aDocument;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetOwningNode(nsIDOMNode* aOwningNode)
{ // not ref counted
mOwningNode = aOwningNode;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::ContainsStyleSheet(nsIURI* aURL) const
{
NS_PRECONDITION(nsnull != aURL, "null arg");
PRBool result;
nsresult rv = mInner->mURL->Equals(aURL, &result);
if (NS_FAILED(rv)) result = PR_FALSE;
const CSSStyleSheetImpl* child = mFirstChild;
while ((PR_FALSE == result) && (nsnull != child)) {
result = (NS_OK == child->ContainsStyleSheet(aURL));
child = child->mNext;
}
return ((result) ? NS_OK : NS_COMFALSE);
}
NS_IMETHODIMP
CSSStyleSheetImpl::AppendStyleSheet(nsICSSStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (NS_SUCCEEDED(WillDirty())) {
NS_ADDREF(aSheet);
CSSStyleSheetImpl* sheet = (CSSStyleSheetImpl*)aSheet;
if (! mFirstChild) {
mFirstChild = sheet;
}
else {
CSSStyleSheetImpl* child = mFirstChild;
while (child->mNext) {
child = child->mNext;
}
child->mNext = sheet;
}
// This is not reference counted. Our parent tells us when
// it's going away.
sheet->mParent = this;
DidDirty();
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::InsertStyleSheetAt(nsICSSStyleSheet* aSheet, PRInt32 aIndex)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
nsresult result = WillDirty();
if (NS_SUCCEEDED(result)) {
NS_ADDREF(aSheet);
CSSStyleSheetImpl* sheet = (CSSStyleSheetImpl*)aSheet;
CSSStyleSheetImpl* child = mFirstChild;
if (aIndex && child) {
while ((0 < --aIndex) && child->mNext) {
child = child->mNext;
}
sheet->mNext = child->mNext;
child->mNext = sheet;
}
else {
sheet->mNext = mFirstChild;
mFirstChild = sheet;
}
// This is not reference counted. Our parent tells us when
// it's going away.
sheet->mParent = this;
DidDirty();
}
return result;
}
NS_IMETHODIMP
CSSStyleSheetImpl::PrependStyleRule(nsICSSRule* aRule)
{
NS_PRECONDITION(nsnull != aRule, "null arg");
if (NS_SUCCEEDED(WillDirty())) {
if (! mInner->mOrderedRules) {
NS_NewISupportsArray(&(mInner->mOrderedRules));
}
if (mInner->mOrderedRules) {
mInner->mOrderedRules->InsertElementAt(aRule, 0);
aRule->SetStyleSheet(this);
DidDirty();
PRInt32 type;
aRule->GetType(type);
if (nsICSSRule::NAMESPACE_RULE == type) {
// no api to prepend a namespace (ugh), release old ones and re-create them all
mInner->RebuildNameSpaces();
}
}
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::AppendStyleRule(nsICSSRule* aRule)
{
NS_PRECONDITION(nsnull != aRule, "null arg");
if (NS_SUCCEEDED(WillDirty())) {
if (! mInner->mOrderedRules) {
NS_NewISupportsArray(&(mInner->mOrderedRules));
}
if (mInner->mOrderedRules) {
mInner->mOrderedRules->AppendElement(aRule);
aRule->SetStyleSheet(this);
DidDirty();
PRInt32 type;
aRule->GetType(type);
if (nsICSSRule::NAMESPACE_RULE == type) {
if (! mInner->mNameSpace) {
nsINameSpaceManager* nameSpaceMgr;
NS_NewNameSpaceManager(&nameSpaceMgr);
if (nameSpaceMgr) {
nameSpaceMgr->CreateRootNameSpace(mInner->mNameSpace);
NS_RELEASE(nameSpaceMgr);
}
}
if (mInner->mNameSpace) {
nsICSSNameSpaceRule* nameSpaceRule = (nsICSSNameSpaceRule*)aRule;
nsINameSpace* newNameSpace = nsnull;
nsIAtom* prefix = nsnull;
nsAutoString urlSpec;
nameSpaceRule->GetPrefix(prefix);
nameSpaceRule->GetURLSpec(urlSpec);
mInner->mNameSpace->CreateChildNameSpace(prefix, urlSpec, newNameSpace);
NS_IF_RELEASE(prefix);
if (newNameSpace) {
NS_RELEASE(mInner->mNameSpace);
mInner->mNameSpace = newNameSpace; // takes ref
}
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::StyleRuleCount(PRInt32& aCount) const
{
aCount = 0;
if (mInner && mInner->mOrderedRules) {
PRUint32 cnt;
nsresult rv = ((CSSStyleSheetImpl*)this)->mInner->mOrderedRules->Count(&cnt); // XXX bogus cast -- this method should not be const
aCount = (PRInt32)cnt;
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetStyleRuleAt(PRInt32 aIndex, nsICSSRule*& aRule) const
{
nsresult result = NS_ERROR_ILLEGAL_VALUE;
if (mInner && mInner->mOrderedRules) {
aRule = (nsICSSRule*)(mInner->mOrderedRules->ElementAt(aIndex));
if (nsnull != aRule) {
result = NS_OK;
}
}
else {
aRule = nsnull;
}
return result;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetNameSpace(nsINameSpace*& aNameSpace) const
{
aNameSpace = ((mInner) ? mInner->mNameSpace : nsnull);
NS_IF_ADDREF(aNameSpace);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetDefaultNameSpaceID(PRInt32 aDefaultNameSpaceID)
{
if (mInner) {
mInner->mDefaultNameSpaceID = aDefaultNameSpaceID;
mInner->RebuildNameSpaces();
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::StyleSheetCount(PRInt32& aCount) const
{
// XXX Far from an ideal way to do this, but the hope is that
// it won't be done too often. If it is, we might want to
// consider storing the children in an array.
aCount = 0;
const CSSStyleSheetImpl* child = mFirstChild;
while (child) {
aCount++;
child = child->mNext;
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetStyleSheetAt(PRInt32 aIndex, nsICSSStyleSheet*& aSheet) const
{
// XXX Ughh...an O(n^2) method for doing iteration. Again, we hope
// that this isn't done too often. If it is, we need to change the
// underlying storage mechanism
aSheet = nsnull;
if (mFirstChild) {
const CSSStyleSheetImpl* child = mFirstChild;
while ((child) && (0 != aIndex)) {
--aIndex;
child = child->mNext;
}
aSheet = (nsICSSStyleSheet*)child;
NS_IF_ADDREF(aSheet);
}
return NS_OK;
}
nsresult
CSSStyleSheetImpl::EnsureUniqueInner(void)
{
if (! mInner) {
return NS_ERROR_NOT_INITIALIZED;
}
if (1 < mInner->mSheets.Count()) {
CSSStyleSheetInner* clone = mInner->CloneFor(this);
if (clone) {
mInner->RemoveSheet(this);
mInner = clone;
}
else {
return NS_ERROR_OUT_OF_MEMORY;
}
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::Clone(nsICSSStyleSheet*& aClone) const
{
// XXX no, really need to clone
CSSStyleSheetImpl* clone = new CSSStyleSheetImpl(*this);
if (clone) {
aClone = (nsICSSStyleSheet*)clone;
NS_ADDREF(aClone);
}
return NS_OK;
}
static void
ListRules(nsISupportsArray* aRules, FILE* aOut, PRInt32 aIndent)
{
PRUint32 count;
PRUint32 index;
if (aRules) {
aRules->Count(&count);
for (index = 0; index < count; index++) {
nsICSSRule* rule = (nsICSSRule*)aRules->ElementAt(index);
rule->List(aOut, aIndent);
NS_RELEASE(rule);
}
}
}
struct ListEnumData {
ListEnumData(FILE* aOut, PRInt32 aIndent)
: mOut(aOut),
mIndent(aIndent)
{
}
FILE* mOut;
PRInt32 mIndent;
};
#if 0
static PRBool ListCascade(nsHashKey* aKey, void* aValue, void* aClosure)
{
AtomKey* key = (AtomKey*)aKey;
RuleCascadeData* cascade = (RuleCascadeData*)aValue;
ListEnumData* data = (ListEnumData*)aClosure;
fputs("\nRules in cascade order for medium: \"", data->mOut);
nsAutoString buffer;
key->mAtom->ToString(buffer);
fputs(buffer, data->mOut);
fputs("\"\n", data->mOut);
ListRules(cascade->mWeightedRules, data->mOut, data->mIndent);
return PR_TRUE;
}
#endif
void CSSStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
{
PRInt32 index;
// Indent
for (index = aIndent; --index >= 0; ) fputs(" ", out);
if (! mInner) {
fputs("CSS Style Sheet - without inner data storage - ERROR\n", out);
return;
}
fputs("CSS Style Sheet: ", out);
char* urlSpec = nsnull;
nsresult rv = mInner->mURL->GetSpec(&urlSpec);
if (NS_SUCCEEDED(rv) && urlSpec) {
fputs(urlSpec, out);
nsCRT::free(urlSpec);
}
if (mMedia) {
fputs(" media: ", out);
index = 0;
PRUint32 count;
mMedia->Count(&count);
nsAutoString buffer;
while (index < PRInt32(count)) {
nsIAtom* medium = (nsIAtom*)mMedia->ElementAt(index++);
medium->ToString(buffer);
fputs(buffer, out);
if (index < PRInt32(count)) {
fputs(", ", out);
}
NS_RELEASE(medium);
}
}
fputs("\n", out);
const CSSStyleSheetImpl* child = mFirstChild;
while (nsnull != child) {
child->List(out, aIndent + 1);
child = child->mNext;
}
fputs("Rules in source order:\n", out);
ListRules(mInner->mOrderedRules, out, aIndent);
}
static PRBool
EnumClearRuleCascades(void* aProcessor, void* aData)
{
nsICSSStyleRuleProcessor* processor = (nsICSSStyleRuleProcessor*)aProcessor;
processor->ClearRuleCascades();
return PR_TRUE;
}
void
CSSStyleSheetImpl::ClearRuleCascades(void)
{
if (mRuleProcessors) {
mRuleProcessors->EnumerateForwards(EnumClearRuleCascades, nsnull);
}
if (mParent) {
CSSStyleSheetImpl* parent = (CSSStyleSheetImpl*)mParent;
parent->ClearRuleCascades();
}
}
nsresult
CSSStyleSheetImpl::WillDirty(void)
{
return EnsureUniqueInner();
}
void
CSSStyleSheetImpl::DidDirty(void)
{
ClearRuleCascades();
mDirty = PR_TRUE;
}
NS_IMETHODIMP
CSSStyleSheetImpl::IsUnmodified(void) const
{
return ((mDirty) ? NS_COMFALSE : NS_OK);
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetModified(PRBool aModified)
{
mDirty = aModified;
return NS_OK;
}
// nsIDOMStyleSheet interface
NS_IMETHODIMP
CSSStyleSheetImpl::GetType(nsString& aType)
{
aType.Truncate();
aType.Append("text/css");
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetDisabled(PRBool* aDisabled)
{
*aDisabled = mDisabled;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetDisabled(PRBool aDisabled)
{
PRBool oldState = mDisabled;
mDisabled = aDisabled;
if ((nsnull != mDocument) && (mDisabled != oldState)) {
mDocument->SetStyleSheetDisabledState(this, mDisabled);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetReadOnly(PRBool* aReadOnly)
{
// XXX TBI
*aReadOnly = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetOwningNode(nsIDOMNode** aOwningNode)
{
NS_IF_ADDREF(mOwningNode);
*aOwningNode = mOwningNode;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetParentStyleSheet(nsIDOMStyleSheet** aParentStyleSheet)
{
if (nsnull != mParent) {
return mParent->QueryInterface(kIDOMStyleSheetIID, (void **)aParentStyleSheet);
}
else {
*aParentStyleSheet = nsnull;
return NS_OK;
}
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetHref(nsString& aHref)
{
if (mInner && mInner->mURL) {
char* str = nsnull;
mInner->mURL->GetSpec(&str);
aHref = str;
if (str) {
nsCRT::free(str);
}
}
else {
aHref.SetLength(0);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetTitle(nsString& aTitle)
{
aTitle = mTitle;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetMedia(nsString& aMedia)
{
aMedia.Truncate();
if (nsnull != mMedia) {
PRUint32 cnt;
nsresult rv = mMedia->Count(&cnt);
if (NS_FAILED(rv)) return rv;
PRInt32 count = cnt;
PRInt32 index = 0;
nsAutoString buffer;
while (index < count) {
nsIAtom* medium = (nsIAtom*)mMedia->ElementAt(index++);
medium->ToString(buffer);
aMedia.Append(buffer);
if (index < count) {
aMedia.Append(", ");
}
}
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetCssRules(nsIDOMCSSStyleRuleCollection** aCssRules)
{
if (nsnull == mRuleCollection) {
mRuleCollection = new CSSStyleRuleCollectionImpl(this);
if (nsnull == mRuleCollection) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mRuleCollection);
}
*aCssRules = mRuleCollection;
NS_ADDREF(mRuleCollection);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::InsertRule(const nsString& aRule,
PRUint32 aIndex,
PRUint32* aReturn)
{
nsICSSParser* css;
// XXX should get parser from CSS loader
nsresult result = NS_NewCSSParser(&css);
if (NS_OK == result) {
nsString* str = new nsString(aRule); // will be deleted by the input stream
nsIUnicharInputStream* input = nsnull;
result = NS_NewStringUnicharInputStream(&input, str);
if (NS_OK == result) {
nsICSSStyleSheet* tmp;
css->SetStyleSheet(this);
// XXX Currently, the parser will append the rule to the
// style sheet. We shouldn't ignore the index.
result = css->Parse(input, mInner->mURL, tmp);
NS_ASSERTION(tmp == this, "parser incorrectly created a new stylesheet");
NS_RELEASE(tmp);
NS_RELEASE(input);
PRUint32 cnt;
if (mInner && mInner->mOrderedRules) {
result = mInner->mOrderedRules->Count(&cnt);
if (NS_SUCCEEDED(result)) {
*aReturn = cnt;
if (nsnull != mDocument) {
nsICSSRule* rule;
rule = (nsICSSRule*)(mInner->mOrderedRules->ElementAt(aIndex));
mDocument->StyleRuleAdded(this, rule);
NS_IF_RELEASE(rule);
}
}
}
}
NS_RELEASE(css);
}
return result;
}
NS_IMETHODIMP
CSSStyleSheetImpl::DeleteRule(PRUint32 aIndex)
{
nsresult result = NS_ERROR_INVALID_ARG;
// XXX TBI: handle @rule types
if (mInner && mInner->mOrderedRules) {
result = WillDirty();
if (NS_SUCCEEDED(result)) {
nsICSSRule *rule;
rule = (nsICSSRule*)(mInner->mOrderedRules->ElementAt(aIndex));
if (nsnull != rule) {
mInner->mOrderedRules->RemoveElementAt(aIndex);
rule->SetStyleSheet(nsnull);
DidDirty();
NS_RELEASE(rule);
}
}
}
return result;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetScriptObject(nsIScriptContext *aContext, void** aScriptObject)
{
nsresult res = NS_OK;
nsIScriptGlobalObject *global = aContext->GetGlobalObject();
if (nsnull == mScriptObject) {
nsISupports *supports = (nsISupports *)(nsICSSStyleSheet *)this;
// XXX Should be done through factory
res = NS_NewScriptCSSStyleSheet(aContext,
supports,
(nsISupports *)global,
(void**)&mScriptObject);
}
*aScriptObject = mScriptObject;
NS_RELEASE(global);
return res;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetScriptObject(void* aScriptObject)
{
mScriptObject = aScriptObject;
return NS_OK;
}
// XXX for backwards compatibility and convenience
NS_HTML nsresult
NS_NewCSSStyleSheet(nsICSSStyleSheet** aInstancePtrResult, nsIURI* aURL)
{
nsICSSStyleSheet* sheet;
nsresult rv;
if (NS_FAILED(rv = NS_NewCSSStyleSheet(&sheet)))
return rv;
if (NS_FAILED(rv = sheet->Init(aURL))) {
NS_RELEASE(sheet);
return rv;
}
*aInstancePtrResult = sheet;
return NS_OK;
}
NS_HTML nsresult
NS_NewCSSStyleSheet(nsICSSStyleSheet** aInstancePtrResult)
{
if (aInstancePtrResult == nsnull) {
return NS_ERROR_NULL_POINTER;
}
CSSStyleSheetImpl *it = new CSSStyleSheetImpl();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(it);
*aInstancePtrResult = it;
return NS_OK;
}
// -------------------------------
// CSS Style rule processor implementation
//
CSSRuleProcessor::CSSRuleProcessor(void)
: mSheets(nsnull),
mMediumCascadeTable(nsnull)
{
NS_INIT_REFCNT();
}
static PRBool
DropProcessorReference(nsISupports* aSheet, void* aProcessor)
{
nsICSSStyleSheet* sheet = (nsICSSStyleSheet*)aSheet;
nsICSSStyleRuleProcessor* processor = (nsICSSStyleRuleProcessor*)aProcessor;
sheet->DropRuleProcessorReference(processor);
return PR_TRUE;
}
CSSRuleProcessor::~CSSRuleProcessor(void)
{
if (mSheets) {
mSheets->EnumerateForwards(DropProcessorReference, this);
NS_RELEASE(mSheets);
}
ClearRuleCascades();
}
NS_IMPL_ADDREF(CSSRuleProcessor);
NS_IMPL_RELEASE(CSSRuleProcessor);
nsresult
CSSRuleProcessor::QueryInterface(REFNSIID aIID, void** aInstancePtrResult)
{
if (NULL == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
if (aIID.Equals(nsICSSStyleRuleProcessor::GetIID())) {
*aInstancePtrResult = (void*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(nsIStyleRuleProcessor::GetIID())) {
*aInstancePtrResult = (void*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtrResult = (void*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
CSSRuleProcessor::AppendStyleSheet(nsICSSStyleSheet* aStyleSheet)
{
nsresult result = NS_OK;
if (! mSheets) {
result = NS_NewISupportsArray(&mSheets);
}
if (mSheets) {
mSheets->AppendElement(aStyleSheet);
}
return result;
}
static const PRUnichar kNullCh = PRUnichar('\0');
static PRBool ValueIncludes(const nsString& aValueList, const nsString& aValue, PRBool aCaseSensitive)
{
nsAutoString valueList(aValueList);
valueList.Append(kNullCh); // put an extra null at the end
PRUnichar* value = (PRUnichar*)(const PRUnichar*)aValue.GetUnicode();
PRUnichar* start = (PRUnichar*)(const PRUnichar*)valueList.GetUnicode();
PRUnichar* end = start;
while (kNullCh != *start) {
while ((kNullCh != *start) && nsString::IsSpace(*start)) { // skip leading space
start++;
}
end = start;
while ((kNullCh != *end) && (PR_FALSE == nsString::IsSpace(*end))) { // look for space or end
end++;
}
*end = kNullCh; // end string here
if (start < end) {
if (aCaseSensitive) {
if (aValue.Equals(value, start)) {
return PR_TRUE;
}
}
else {
if (aValue.EqualsIgnoreCase(value, start)) {
return PR_TRUE;
}
}
}
start = ++end;
}
return PR_FALSE;
}
static const PRUnichar kDashCh = PRUnichar('-');
static PRBool ValueDashMatch(const nsString& aValueList, const nsString& aValue, PRBool aCaseSensitive)
{
nsAutoString valueList(aValueList);
valueList.Append(kNullCh); // put an extra null at the end
PRUnichar* value = (PRUnichar*)(const PRUnichar*)aValue.GetUnicode();
PRUnichar* start = (PRUnichar*)(const PRUnichar*)valueList.GetUnicode();
PRUnichar* end = start;
if (kNullCh != *start) {
while ((kNullCh != *start) && nsString::IsSpace(*start)) { // skip leading space
start++;
}
end = start;
while ((kNullCh != *end) && (kDashCh != *end)) { // look for dash or end
end++;
}
*end = kNullCh; // end string here
if (start < end) {
if (aCaseSensitive) {
if (aValue.Equals(value, start)) {
return PR_TRUE;
}
}
else {
if (aValue.EqualsIgnoreCase(value, start)) {
return PR_TRUE;
}
}
}
}
return PR_FALSE;
}
static PRBool IsEventPseudo(nsIAtom* aAtom)
{
return PRBool ((nsCSSAtoms::activePseudo == aAtom) ||
(nsCSSAtoms::dragOverPseudo == aAtom) ||
// (nsCSSAtoms::dragPseudo == aAtom) || // not real yet
(nsCSSAtoms::focusPseudo == aAtom) ||
(nsCSSAtoms::hoverPseudo == aAtom));
// XXX selected, enabled, disabled, selection?
}
static PRBool IsLinkPseudo(nsIAtom* aAtom)
{
return PRBool ((nsCSSAtoms::linkPseudo == aAtom) ||
(nsCSSAtoms::outOfDatePseudo == aAtom) ||
(nsCSSAtoms::visitedPseudo == aAtom));
}
static PRBool SelectorMatches(nsIPresContext* aPresContext,
nsCSSSelector* aSelector, nsIContent* aContent,
PRBool aTestState)
{
PRBool result = PR_FALSE;
nsIAtom* contentTag;
aContent->GetTag(contentTag);
PRInt32 nameSpaceID;
aContent->GetNameSpaceID(nameSpaceID);
if (((nsnull == aSelector->mTag) || (aSelector->mTag == contentTag)) &&
((kNameSpaceID_Unknown == aSelector->mNameSpace) || (nameSpaceID == aSelector->mNameSpace))) {
result = PR_TRUE;
// namespace/tag match
if (nsnull != aSelector->mAttrList) { // test for attribute match
nsAttrSelector* attr = aSelector->mAttrList;
do {
nsAutoString value;
nsresult attrState = aContent->GetAttribute(attr->mNameSpace, attr->mAttr, value);
if (NS_FAILED(attrState) || (NS_CONTENT_ATTR_NOT_THERE == attrState)) {
result = PR_FALSE;
}
else {
switch (attr->mFunction) {
case NS_ATTR_FUNC_SET: break;
case NS_ATTR_FUNC_EQUALS:
if (attr->mCaseSensitive) {
result = value.Equals(attr->mValue);
}
else {
result = value.EqualsIgnoreCase(attr->mValue);
}
break;
case NS_ATTR_FUNC_INCLUDES:
result = ValueIncludes(value, attr->mValue, attr->mCaseSensitive);
break;
case NS_ATTR_FUNC_DASHMATCH:
result = ValueDashMatch(value, attr->mValue, attr->mCaseSensitive);
break;
}
}
attr = attr->mNext;
} while ((PR_TRUE == result) && (nsnull != attr));
}
if ((PR_TRUE == result) &&
((nsnull != aSelector->mID) || (nsnull != aSelector->mClassList))) { // test for ID & class match
result = PR_FALSE;
nsIStyledContent* styledContent;
if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent))) {
nsIAtom* contentID;
styledContent->GetID(contentID);
if ((nsnull == aSelector->mID) || (aSelector->mID == contentID)) {
result = PR_TRUE;
nsAtomList* classList = aSelector->mClassList;
while (nsnull != classList) {
if (NS_COMFALSE == styledContent->HasClass(classList->mAtom)) {
result = PR_FALSE;
break;
}
classList = classList->mNext;
}
}
NS_IF_RELEASE(contentID);
NS_RELEASE(styledContent);
}
}
if ((PR_TRUE == result) &&
(nsnull != aSelector->mPseudoClassList)) { // test for pseudo class match
// first-child, root, lang, active, focus, hover, link, outOfDate, visited
// XXX disabled, enabled, selected, selection
nsAtomList* pseudoClass = aSelector->mPseudoClassList;
PRInt32 eventState = NS_EVENT_STATE_UNSPECIFIED;
nsLinkState linkState = nsLinkState(-1); // not a link
nsILinkHandler* linkHandler = nsnull;
nsIEventStateManager* eventStateManager = nsnull;
while ((PR_TRUE == result) && (nsnull != pseudoClass)) {
if (nsCSSAtoms::firstChildPseudo == pseudoClass->mAtom) {
nsIContent* firstChild = nsnull;
nsIContent* parent;
aContent->GetParent(parent);
if (parent) {
PRInt32 index = -1;
do {
parent->ChildAt(++index, firstChild);
if (firstChild) { // skip text & comments
nsIAtom* tag;
firstChild->GetTag(tag);
if ((tag != nsLayoutAtoms::textTagName) &&
(tag != nsLayoutAtoms::commentTagName) &&
(tag != nsLayoutAtoms::processingInstructionTagName)) {
NS_IF_RELEASE(tag);
break;
}
NS_IF_RELEASE(tag);
NS_RELEASE(firstChild);
}
else {
break;
}
} while (1 == 1);
NS_RELEASE(parent);
}
result = PRBool(aContent == firstChild);
NS_IF_RELEASE(firstChild);
}
else if (nsCSSAtoms::firstNodePseudo == pseudoClass->mAtom) {
nsIContent* firstChild = nsnull;
nsIContent* parent;
aContent->GetParent(parent);
if (parent) {
PRInt32 index = -1;
do {
parent->ChildAt(++index, firstChild);
if (firstChild) { // skip text & comments
nsIAtom* tag;
firstChild->GetTag(tag);
if ((tag != nsLayoutAtoms::textTagName) &&
(tag != nsLayoutAtoms::commentTagName) &&
(tag != nsLayoutAtoms::processingInstructionTagName)) {
NS_IF_RELEASE(tag);
break;
}
if (tag == nsLayoutAtoms::textTagName) { // skip only whitespace text
nsITextContent* text = nsnull;
if (NS_SUCCEEDED(firstChild->QueryInterface(nsITextContent::GetIID(), (void**)&text))) {
PRBool isWhite;
text->IsOnlyWhitespace(&isWhite);
NS_RELEASE(text);
if (! isWhite) {
NS_RELEASE(tag);
break;
}
}
}
NS_IF_RELEASE(tag);
NS_RELEASE(firstChild);
}
else {
break;
}
} while (1 == 1);
NS_RELEASE(parent);
}
result = PRBool(aContent == firstChild);
NS_IF_RELEASE(firstChild);
}
else if (nsCSSAtoms::rootPseudo == pseudoClass->mAtom) {
nsIContent* parent;
aContent->GetParent(parent);
if (parent) {
NS_RELEASE(parent);
result = PR_FALSE;
}
else {
result = PR_TRUE;
}
}
else if (nsCSSAtoms::langPseudo == pseudoClass->mAtom) {
// XXX not yet implemented
result = PR_FALSE;
}
else if (IsEventPseudo(pseudoClass->mAtom)) {
if (aTestState) {
if (! eventStateManager) {
aPresContext->GetEventStateManager(&eventStateManager);
if (eventStateManager) {
eventStateManager->GetContentState(aContent, eventState);
}
}
if (nsCSSAtoms::activePseudo == pseudoClass->mAtom) {
result = PRBool(0 != (eventState & NS_EVENT_STATE_ACTIVE));
}
else if (nsCSSAtoms::focusPseudo == pseudoClass->mAtom) {
result = PRBool(0 != (eventState & NS_EVENT_STATE_FOCUS));
}
else if (nsCSSAtoms::hoverPseudo == pseudoClass->mAtom) {
result = PRBool(0 != (eventState & NS_EVENT_STATE_HOVER));
}
else if (nsCSSAtoms::dragOverPseudo == pseudoClass->mAtom) {
result = PRBool(0 != (eventState & NS_EVENT_STATE_DRAGOVER));
}
}
}
else if (IsLinkPseudo(pseudoClass->mAtom)) {
// XXX xml link too
if (nsHTMLAtoms::a == contentTag) {
if (aTestState) {
if (! linkHandler) {
aPresContext->GetLinkHandler(&linkHandler);
if (linkHandler) {
nsAutoString base, href;
nsresult attrState = aContent->GetAttribute(kNameSpaceID_None, nsHTMLAtoms::href, href);
if (NS_CONTENT_ATTR_HAS_VALUE == attrState) {
nsIURI* docURL = nsnull;
nsIHTMLContent* htmlContent;
if (NS_SUCCEEDED(aContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent))) {
htmlContent->GetBaseURL(docURL);
NS_RELEASE(htmlContent);
}
else {
nsIDocument* doc = nsnull;
aContent->GetDocument(doc);
if (nsnull != doc) {
doc->GetBaseURL(docURL);
NS_RELEASE(doc);
}
}
nsAutoString absURLSpec;
nsresult rv;
nsIURI *baseUri = nsnull;
rv = docURL->QueryInterface(nsIURI::GetIID(), (void**)&baseUri);
if (NS_FAILED(rv)) return PR_FALSE;
NS_MakeAbsoluteURI(href, baseUri, absURLSpec);
NS_RELEASE(baseUri);
NS_IF_RELEASE(docURL);
linkHandler->GetLinkState(absURLSpec.GetUnicode(), linkState);
}
}
else {
// no link handler? then all links are unvisited
linkState = eLinkState_Unvisited;
}
}
if (nsCSSAtoms::linkPseudo == pseudoClass->mAtom) {
result = PRBool(eLinkState_Unvisited == linkState);
}
else if (nsCSSAtoms::outOfDatePseudo == pseudoClass->mAtom) {
result = PRBool(eLinkState_OutOfDate == linkState);
}
else if (nsCSSAtoms::visitedPseudo == pseudoClass->mAtom) {
result = PRBool(eLinkState_Visited == linkState);
}
}
}
else {
result = PR_FALSE; // not a link
}
}
else {
result = PR_FALSE; // unknown pseudo class
}
pseudoClass = pseudoClass->mNext;
}
NS_IF_RELEASE(linkHandler);
NS_IF_RELEASE(eventStateManager);
}
}
NS_IF_RELEASE(contentTag);
return result;
}
struct ContentEnumData {
ContentEnumData(nsIPresContext* aPresContext, nsIContent* aContent,
nsIStyleContext* aParentContext, nsISupportsArray* aResults)
{
mPresContext = aPresContext;
mContent = aContent;
mParentContext = aParentContext;
mResults = aResults;
}
nsIPresContext* mPresContext;
nsIContent* mContent;
nsIStyleContext* mParentContext;
nsISupportsArray* mResults;
};
static PRBool SelectorMatchesTree(nsIPresContext* aPresContext,
nsIContent* aLastContent,
nsCSSSelector* aSelector)
{
nsCSSSelector* selector = aSelector;
if (selector) {
nsIContent* content = nsnull;
nsIContent* lastContent = aLastContent;
NS_ADDREF(lastContent);
while (nsnull != selector) { // check compound selectors
if (PRUnichar('+') == selector->mOperator) { // fetch previous sibling
nsIContent* parent;
PRInt32 index;
lastContent->GetParent(parent);
if (parent) {
parent->IndexOf(lastContent, index);
while (0 <= --index) { // skip text & comment nodes
parent->ChildAt(index, content);
nsIAtom* tag;
content->GetTag(tag);
if ((tag != nsLayoutAtoms::textTagName) &&
(tag != nsLayoutAtoms::commentTagName)) {
NS_IF_RELEASE(tag);
break;
}
NS_RELEASE(content);
NS_IF_RELEASE(tag);
}
NS_RELEASE(parent);
}
}
else { // fetch parent
lastContent->GetParent(content);
}
if (! content) {
break;
}
if (SelectorMatches(aPresContext, selector, content, PR_TRUE)) {
selector = selector->mNext;
}
else {
if (PRUnichar(0) != selector->mOperator) {
NS_RELEASE(content);
break; // parent was required to match
}
}
NS_IF_RELEASE(lastContent);
lastContent = content; // take refcount
content = nsnull;
}
NS_IF_RELEASE(lastContent);
}
return PRBool(nsnull == selector); // matches if ran out of selectors
}
static void ContentEnumFunc(nsICSSStyleRule* aRule, void* aData)
{
ContentEnumData* data = (ContentEnumData*)aData;
nsCSSSelector* selector = aRule->FirstSelector();
if (SelectorMatches(data->mPresContext, selector, data->mContent, PR_TRUE)) {
selector = selector->mNext;
if (SelectorMatchesTree(data->mPresContext, data->mContent, selector)) {
nsIStyleRule* iRule;
if (NS_OK == aRule->QueryInterface(kIStyleRuleIID, (void**)&iRule)) {
data->mResults->AppendElement(iRule);
NS_RELEASE(iRule);
iRule = aRule->GetImportantRule();
if (nsnull != iRule) {
data->mResults->AppendElement(iRule);
NS_RELEASE(iRule);
}
}
}
}
}
#ifdef DEBUG_RULES
static PRBool ContentEnumWrap(nsISupports* aRule, void* aData)
{
ContentEnumFunc((nsICSSStyleRule*)aRule, aData);
return PR_TRUE;
}
#endif
NS_IMETHODIMP
CSSRuleProcessor::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");
RuleCascadeData* cascade = GetRuleCascade(aMedium);
if (cascade) {
ContentEnumData data(aPresContext, aContent, aParentContext, aResults);
nsIAtom* tagAtom;
aContent->GetTag(tagAtom);
nsIAtom* idAtom = nsnull;
nsAutoVoidArray classArray;
nsIStyledContent* styledContent;
if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent))) {
styledContent->GetID(idAtom);
styledContent->GetClasses(classArray);
NS_RELEASE(styledContent);
}
cascade->mRuleHash.EnumerateAllRules(tagAtom, idAtom, classArray, ContentEnumFunc, &data);
#ifdef DEBUG_RULES
nsISupportsArray* list1;
nsISupportsArray* list2;
NS_NewISupportsArray(&list1);
NS_NewISupportsArray(&list2);
data.mResults = list1;
cascade->mRuleHash.EnumerateAllRules(tagAtom, idAtom, classArray, ContentEnumFunc, &data);
data.mResults = list2;
cascade->mWeightedRules->EnumerateBackwards(ContentEnumWrap, &data);
NS_ASSERTION(list1->Equals(list2), "lists not equal");
NS_RELEASE(list1);
NS_RELEASE(list2);
#endif
NS_IF_RELEASE(tagAtom);
NS_IF_RELEASE(idAtom);
}
return NS_OK;
}
struct PseudoEnumData {
PseudoEnumData(nsIPresContext* aPresContext, nsIContent* aParentContent,
nsIAtom* aPseudoTag, nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
mPresContext = aPresContext;
mParentContent = aParentContent;
mPseudoTag = aPseudoTag;
mParentContext = aParentContext;
mResults = aResults;
}
nsIPresContext* mPresContext;
nsIContent* mParentContent;
nsIAtom* mPseudoTag;
nsIStyleContext* mParentContext;
nsISupportsArray* mResults;
};
static void PseudoEnumFunc(nsICSSStyleRule* aRule, void* aData)
{
PseudoEnumData* data = (PseudoEnumData*)aData;
nsCSSSelector* selector = aRule->FirstSelector();
if (selector->mTag == data->mPseudoTag) {
selector = selector->mNext;
if (selector) { // test next selector specially
if (PRUnichar('+') == selector->mOperator) {
return; // not valid here, can't match
}
if (SelectorMatches(data->mPresContext, selector, data->mParentContent, PR_TRUE)) {
selector = selector->mNext;
}
else {
if (PRUnichar('>') == selector->mOperator) {
return; // immediate parent didn't match
}
}
}
if (selector &&
(! SelectorMatchesTree(data->mPresContext, data->mParentContent, selector))) {
return; // remaining selectors didn't match
}
nsIStyleRule* iRule;
if (NS_OK == aRule->QueryInterface(kIStyleRuleIID, (void**)&iRule)) {
data->mResults->AppendElement(iRule);
NS_RELEASE(iRule);
iRule = aRule->GetImportantRule();
if (nsnull != iRule) {
data->mResults->AppendElement(iRule);
NS_RELEASE(iRule);
}
}
}
}
#ifdef DEBUG_RULES
static PRBool PseudoEnumWrap(nsISupports* aRule, void* aData)
{
PseudoEnumFunc((nsICSSStyleRule*)aRule, aData);
return PR_TRUE;
}
#endif
NS_IMETHODIMP
CSSRuleProcessor::RulesMatching(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
NS_PRECONDITION(nsnull != aPresContext, "null arg");
NS_PRECONDITION(nsnull != aPseudoTag, "null arg");
NS_PRECONDITION(nsnull != aResults, "null arg");
RuleCascadeData* cascade = GetRuleCascade(aMedium);
if (cascade) {
PseudoEnumData data(aPresContext, aParentContent, aPseudoTag, aParentContext, aResults);
cascade->mRuleHash.EnumerateTagRules(aPseudoTag, PseudoEnumFunc, &data);
#ifdef DEBUG_RULES
nsISupportsArray* list1;
nsISupportsArray* list2;
NS_NewISupportsArray(&list1);
NS_NewISupportsArray(&list2);
data.mResults = list1;
cascade->mRuleHash.EnumerateTagRules(aPseudoTag, PseudoEnumFunc, &data);
data.mResults = list2;
cascade->mWeightedRules->EnumerateBackwards(PseudoEnumWrap, &data);
NS_ASSERTION(list1->Equals(list2), "lists not equal");
NS_RELEASE(list1);
NS_RELEASE(list2);
#endif
}
return NS_OK;
}
struct StateEnumData
{
StateEnumData(nsIPresContext* aPresContext, nsIContent* aContent)
: mPresContext(aPresContext),
mContent(aContent) {}
nsIPresContext* mPresContext;
nsIContent* mContent;
};
static
PRBool StateEnumFunc(void* aSelector, void* aData)
{
StateEnumData* data = (StateEnumData*)aData;
nsCSSSelector* selector = (nsCSSSelector*)aSelector;
if (SelectorMatches(data->mPresContext, selector, data->mContent, PR_FALSE)) {
selector = selector->mNext;
if (SelectorMatchesTree(data->mPresContext, data->mContent, selector)) {
return PR_FALSE;
}
}
return PR_TRUE;
}
NS_IMETHODIMP
CSSRuleProcessor::HasStateDependentStyle(nsIPresContext* aPresContext,
nsIAtom* aMedium,
nsIContent* aContent)
{
PRBool isStateful = PR_FALSE;
RuleCascadeData* cascade = GetRuleCascade(aMedium);
if (cascade) {
// look up content in state rule list
StateEnumData data(aPresContext, aContent);
isStateful = (! cascade->mStateSelectors.EnumerateForwards(StateEnumFunc, &data)); // if stopped, have state
}
return ((isStateful) ? NS_OK : NS_COMFALSE);
}
static PRBool DeleteRuleCascade(nsHashKey* aKey, void* aValue, void* closure)
{
delete ((RuleCascadeData*)aValue);
return PR_TRUE;
}
NS_IMETHODIMP
CSSRuleProcessor::ClearRuleCascades(void)
{
if (mMediumCascadeTable) {
mMediumCascadeTable->Enumerate(DeleteRuleCascade, nsnull);
delete mMediumCascadeTable;
mMediumCascadeTable = nsnull;
}
return NS_OK;
}
static
PRBool BuildHashEnum(nsISupports* aRule, void* aHash)
{
nsICSSStyleRule* rule = (nsICSSStyleRule*)aRule;
RuleHash* hash = (RuleHash*)aHash;
hash->AppendRule(rule);
return PR_TRUE;
}
static
PRBool IsStateSelector(nsCSSSelector& aSelector)
{
nsAtomList* pseudoClass = aSelector.mPseudoClassList;
while (pseudoClass) {
if ((pseudoClass->mAtom == nsCSSAtoms::activePseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::checkedPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::disabledPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::dragOverPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::dragPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::enabledPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::focusPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::hoverPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::linkPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::outOfDatePseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::selectionPseudo) ||
(pseudoClass->mAtom == nsCSSAtoms::visitedPseudo)) {
return PR_TRUE;
}
pseudoClass = pseudoClass->mNext;
}
return PR_FALSE;
}
static
PRBool BuildStateEnum(nsISupports* aRule, void* aArray)
{
nsICSSStyleRule* rule = (nsICSSStyleRule*)aRule;
nsVoidArray* array = (nsVoidArray*)aArray;
nsCSSSelector* selector = rule->FirstSelector();
while (selector) {
if (IsStateSelector(*selector)) {
array->AppendElement(selector);
}
selector = selector->mNext;
}
return PR_TRUE;
}
struct CascadeEnumData {
CascadeEnumData(nsIAtom* aMedium, nsISupportsArray* aRules)
: mMedium(aMedium),
mRules(aRules)
{
}
nsIAtom* mMedium;
nsISupportsArray* mRules;
};
struct WeightEnumData {
WeightEnumData(PRInt32 aWeight)
: mWeight(aWeight),
mIndex(0)
{
}
PRInt32 mWeight;
PRInt32 mIndex;
};
static PRBool
FindEndOfWeight(nsISupports* aRule, void* aData)
{
nsICSSStyleRule* rule = (nsICSSStyleRule*)aRule;
WeightEnumData* data = (WeightEnumData*)aData;
if (rule->GetWeight() <= data->mWeight) {
return PR_FALSE; // stop loop
}
data->mIndex++;
return PR_TRUE;
}
static PRBool
InsertRuleByWeight(nsISupports* aRule, void* aData)
{
nsICSSRule* rule = (nsICSSRule*)aRule;
CascadeEnumData* data = (CascadeEnumData*)aData;
PRInt32 type;
rule->GetType(type);
if (nsICSSRule::STYLE_RULE == type) {
nsICSSStyleRule* styleRule = (nsICSSStyleRule*)rule;
WeightEnumData weight(styleRule->GetWeight());
data->mRules->EnumerateForwards(FindEndOfWeight, &weight);
data->mRules->InsertElementAt(styleRule, weight.mIndex);
}
else if (nsICSSRule::MEDIA_RULE == type) {
nsICSSMediaRule* mediaRule = (nsICSSMediaRule*)rule;
if (NS_OK == mediaRule->UseForMedium(data->mMedium)) {
mediaRule->EnumerateRulesForwards(InsertRuleByWeight, aData);
}
}
return PR_TRUE;
}
PRBool
CSSRuleProcessor::CascadeSheetRulesInto(nsISupports* aSheet, void* aData)
{
nsICSSStyleSheet* iSheet = (nsICSSStyleSheet*)aSheet;
CSSStyleSheetImpl* sheet = (CSSStyleSheetImpl*)iSheet;
CascadeEnumData* data = (CascadeEnumData*)aData;
if ((NS_OK == sheet->UseForMedium(data->mMedium))) {
CSSStyleSheetImpl* child = sheet->mFirstChild;
while (child) {
CascadeSheetRulesInto((nsICSSStyleSheet*)child, data);
child = child->mNext;
}
if (sheet->mInner && sheet->mInner->mOrderedRules) {
sheet->mInner->mOrderedRules->EnumerateForwards(InsertRuleByWeight, data);
}
}
return PR_TRUE;
}
RuleCascadeData*
CSSRuleProcessor::GetRuleCascade(nsIAtom* aMedium)
{
AtomKey mediumKey(aMedium);
RuleCascadeData* cascade = nsnull;
if (mMediumCascadeTable) {
cascade = (RuleCascadeData*)mMediumCascadeTable->Get(&mediumKey);
}
if (! cascade) {
if (mSheets) {
if (! mMediumCascadeTable) {
mMediumCascadeTable = new nsHashtable();
}
if (mMediumCascadeTable) {
cascade = new RuleCascadeData();
if (cascade) {
mMediumCascadeTable->Put(&mediumKey, cascade);
CascadeEnumData data(aMedium, cascade->mWeightedRules);
mSheets->EnumerateForwards(CascadeSheetRulesInto, &data);
cascade->mWeightedRules->EnumerateBackwards(BuildHashEnum, &(cascade->mRuleHash));
cascade->mWeightedRules->EnumerateBackwards(BuildStateEnum, &(cascade->mStateSelectors));
}
}
}
}
return cascade;
}
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