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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 1.0 (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 "nsICSSStyleSheet.h"
#include "nsIArena.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsISupportsArray.h"
#include "nsHashtable.h"
#include "nsICSSStyleRule.h"
#include "nsIHTMLContent.h"
#include "nsIDocument.h"
#include "nsIPresContext.h"
#include "nsILinkHandler.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 "prlog.h"
//#define DEBUG_REFS
#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(nsIURL);
NS_DEF_PTR(nsISupportsArray);
NS_DEF_PTR(nsICSSStyleSheet);
// ----------------------
// Rule hash key
//
class RuleKey: public nsHashKey {
public:
RuleKey(nsIAtom* aAtom);
RuleKey(const RuleKey& aKey);
virtual ~RuleKey(void);
virtual PRUint32 HashValue(void) const;
virtual PRBool Equals(const nsHashKey *aKey) const;
virtual nsHashKey *Clone(void) const;
nsIAtom* mAtom;
};
RuleKey::RuleKey(nsIAtom* aAtom)
{
mAtom = aAtom;
NS_ADDREF(mAtom);
}
RuleKey::RuleKey(const RuleKey& aKey)
{
mAtom = aKey.mAtom;
NS_ADDREF(mAtom);
}
RuleKey::~RuleKey(void)
{
NS_RELEASE(mAtom);
}
PRUint32 RuleKey::HashValue(void) const
{
return (PRUint32)mAtom;
}
PRBool RuleKey::Equals(const nsHashKey* aKey) const
{
return PRBool (((RuleKey*)aKey)->mAtom == mAtom);
}
nsHashKey* RuleKey::Clone(void) const
{
return new RuleKey(*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");
RuleKey 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
RuleKey universalKey(nsCSSAtoms::universalSelector);
RuleValue* value = (RuleValue*)mTagTable.Get(&universalKey);
if (nsnull != value) {
mEnumList[valueCount++] = value;
}
}
if (nsnull != aTag) {
RuleKey tagKey(aTag);
RuleValue* value = (RuleValue*)mTagTable.Get(&tagKey);
if (nsnull != value) {
mEnumList[valueCount++] = value;
}
}
if (nsnull != aID) {
RuleKey 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);
RuleKey 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)
{
RuleKey tagKey(aTag);
RuleKey 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));
}
}
}
// -------------------------------
// Style Rule Collection for the DOM
//
class CSSStyleRuleCollectionImpl : public nsIDOMCSSStyleRuleCollection,
public nsIScriptObjectOwner
{
public:
CSSStyleRuleCollectionImpl(nsICSSStyleSheet *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();
nsICSSStyleSheet* mStyleSheet;
void* mScriptObject;
};
CSSStyleRuleCollectionImpl::CSSStyleRuleCollectionImpl(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;
}
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) {
*aLength = mStyleSheet->StyleRuleCount();
}
else {
*aLength = 0;
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleRuleCollectionImpl::Item(PRUint32 aIndex, nsIDOMCSSStyleRule** aReturn)
{
nsresult result = NS_OK;
*aReturn = nsnull;
if (nsnull != mStyleSheet) {
nsICSSStyleRule *rule;
result = mStyleSheet->GetStyleRuleAt(aIndex, rule);
if (NS_OK == result) {
result = rule->QueryInterface(kIDOMCSSStyleRuleIID, (void **)aReturn);
}
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 *)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) {
*aLength = mStyleSheet->StyleSheetCount();
}
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
//
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(nsIURL* aURL);
NS_IMETHOD GetURL(nsIURL*& 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 AppendMedium(nsIAtom* aMedium);
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);
virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
virtual PRBool ContainsStyleSheet(nsIURL* aURL) const;
virtual void AppendStyleSheet(nsICSSStyleSheet* aSheet);
// XXX do these belong here or are they generic?
virtual void PrependStyleRule(nsICSSStyleRule* aRule);
virtual void AppendStyleRule(nsICSSStyleRule* aRule);
virtual PRInt32 StyleRuleCount(void) const;
virtual nsresult GetStyleRuleAt(PRInt32 aIndex, nsICSSStyleRule*& aRule) const;
virtual PRInt32 StyleSheetCount(void) const;
virtual nsresult GetStyleSheetAt(PRInt32 aIndex, nsICSSStyleSheet*& aSheet) const;
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 ClearHash(void);
void BuildHash(void);
protected:
PRUint32 mInHeap : 1;
PRUint32 mRefCnt : 31;
nsIURLPtr mURL;
nsString mTitle;
nsISupportsArray* mMedia;
nsICSSStyleSheetPtr mFirstChild;
nsISupportsArrayPtr mOrderedRules;
nsISupportsArrayPtr mWeightedRules;
nsICSSStyleSheetPtr mNext;
nsICSSStyleSheet* mParent;
RuleHash* mRuleHash;
CSSStyleRuleCollectionImpl* mRuleCollection;
CSSImportsCollectionImpl* mImportsCollection;
nsIDocument* mDocument;
nsIDOMNode* mOwningNode;
PRBool mDisabled;
void* mScriptObject;
};
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) {
::delete ptr;
}
}
}
#ifdef DEBUG_REFS
static PRInt32 gInstanceCount;
#endif
CSSStyleSheetImpl::CSSStyleSheetImpl()
: nsICSSStyleSheet(),
mURL(nsnull), mTitle(), mMedia(nsnull),
mFirstChild(nsnull),
mOrderedRules(nsnull), mWeightedRules(nsnull),
mNext(nsnull),
mRuleHash(nsnull)
{
NS_INIT_REFCNT();
nsCSSAtoms::AddrefAtoms();
mParent = nsnull;
mRuleCollection = nsnull;
mImportsCollection = nsnull;
mDocument = nsnull;
mOwningNode = nsnull;
mDisabled = PR_FALSE;
mScriptObject = nsnull;
#ifdef DEBUG_REFS
++gInstanceCount;
fprintf(stdout, "%d + CSSStyleSheet size: %d\n", gInstanceCount, sizeof(*this));
#endif
}
static PRBool DropStyleSheetReference(nsISupports* aElement, void *aData)
{
nsICSSStyleRule *rule = (nsICSSStyleRule *)aElement;
if (nsnull != rule) {
rule->SetStyleSheet(nsnull);
}
return PR_TRUE;
}
CSSStyleSheetImpl::~CSSStyleSheetImpl()
{
#ifdef DEBUG_REFS
--gInstanceCount;
fprintf(stdout, "%d - CSSStyleSheet\n", gInstanceCount);
#endif
NS_IF_RELEASE(mMedia);
if (mFirstChild.IsNotNull()) {
nsICSSStyleSheet* child = mFirstChild;
while (nsnull != child) {
((CSSStyleSheetImpl *)child)->mParent = nsnull;
child = ((CSSStyleSheetImpl*)child)->mNext;
}
}
if (nsnull != mRuleCollection) {
mRuleCollection->DropReference();
NS_RELEASE(mRuleCollection);
}
if (nsnull != mImportsCollection) {
mImportsCollection->DropReference();
NS_RELEASE(mImportsCollection);
}
if (mOrderedRules.IsNotNull()) {
mOrderedRules->EnumerateForwards(DropStyleSheetReference, nsnull);
}
ClearHash();
// XXX The document reference is not reference counted and should
// not be released. The document will let us know when it is going
// away.
nsCSSAtoms::ReleaseAtoms();
}
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;
}
static const PRUnichar kNullCh = PRUnichar('\0');
static PRBool ValueIncludes(const nsString& aValueList, const nsString& aValue)
{
nsAutoString valueList(aValueList);
valueList.Append(kNullCh); // put an extra null at the end
PRUnichar* start = (PRUnichar*)valueList;
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) && (aValue == start)) {
return PR_TRUE;
}
start = ++end;
}
return PR_FALSE;
}
static const PRUnichar kDashCh = PRUnichar('-');
static PRBool ValueDashMatch(const nsString& aValueList, const nsString& aValue)
{
nsAutoString valueList(aValueList);
valueList.Append(kNullCh); // put an extra null at the end
PRUnichar* start = (PRUnichar*)valueList;
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) && (aValue == start)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
static PRBool SelectorMatches(nsIPresContext* aPresContext,
nsCSSSelector* aSelector, nsIContent* aContent)
{
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(kNameSpaceID_Unknown, attr->mAttr, value);
if (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:
if (PR_FALSE == attr->mCaseSensitive) {
value.ToUpperCase();
}
result = ValueIncludes(value, attr->mValue);
break;
case NS_ATTR_FUNC_DASHMATCH:
if (PR_FALSE == attr->mCaseSensitive) {
value.ToUpperCase();
}
result = ValueDashMatch(value, attr->mValue);
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;
nsIHTMLContent* htmlContent;
if (NS_SUCCEEDED(aContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent))) {
nsIAtom* contentID;
htmlContent->GetID(contentID);
if ((nsnull == aSelector->mID) || (aSelector->mID == contentID)) {
result = PR_TRUE;
nsAtomList* classList = aSelector->mClassList;
while (nsnull != classList) {
if (NS_COMFALSE == htmlContent->HasClass(classList->mAtom)) {
result = PR_FALSE;
break;
}
classList = classList->mNext;
}
}
NS_RELEASE(htmlContent);
NS_IF_RELEASE(contentID);
}
}
if ((PR_TRUE == result) &&
(nsnull != aSelector->mPseudoClassList)) { // test for pseudo class match
result = PR_FALSE;
// XXX only testing for anchor pseudo classes right now
// XXX only testing first pseudo class right now
if ((contentTag == nsHTMLAtoms::a) && (nsnull != aSelector->mPseudoClassList)) {
// test link state
nsILinkHandler* linkHandler;
if ((NS_OK == aPresContext->GetLinkHandler(&linkHandler)) &&
(nsnull != linkHandler)) {
nsAutoString base, href;
nsresult attrState = aContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::href, href);
if (NS_CONTENT_ATTR_HAS_VALUE == attrState) {
nsIURL* 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 = NS_MakeAbsoluteURL(docURL, base, href, absURLSpec);
NS_IF_RELEASE(docURL);
nsIAtom* pseudo = aSelector->mPseudoClassList->mAtom;
nsLinkState state;
if (NS_OK == linkHandler->GetLinkState(absURLSpec, state)) {
switch (state) {
case eLinkState_Unvisited:
result = PRBool (pseudo == nsCSSAtoms::linkPseudo);
break;
case eLinkState_Visited:
result = PRBool (pseudo == nsCSSAtoms::visitedPseudo);
break;
case eLinkState_OutOfDate:
result = PRBool (pseudo == nsCSSAtoms::outOfDatePseudo);
break;
//These cases have been moved from nsILinkHandler to to nsIEventStateManager.
//Code needs to be adjusted to get these state items from their new location.
/*case eLinkState_Active:
result = PRBool (pseudo == nsCSSAtoms::activePseudo);
break;
case eLinkState_Hover:
result = PRBool (pseudo == nsCSSAtoms::hoverPseudo);
break;*/
}
}
}
NS_RELEASE(linkHandler);
}
}
}
}
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;
mCount = 0;
}
nsIPresContext* mPresContext;
nsIContent* mContent;
nsIStyleContext* mParentContext;
nsISupportsArray* mResults;
PRInt32 mCount;
};
static void ContentEnumFunc(nsICSSStyleRule* aRule, void* aData)
{
ContentEnumData* data = (ContentEnumData*)aData;
// XXX not dealing with selector functions...
nsCSSSelector* selector = aRule->FirstSelector();
if (SelectorMatches(data->mPresContext, selector, data->mContent)) {
selector = selector->mNext;
nsIContent* content = nsnull;
nsIContent* lastContent = nsnull;
data->mContent->GetParent(content);
while ((nsnull != selector) && (nsnull != content)) { // check compound selectors
if (SelectorMatches(data->mPresContext, selector, content)) {
selector = selector->mNext;
}
lastContent = content;
content->GetParent(content);
NS_IF_RELEASE(lastContent);
}
NS_IF_RELEASE(content);
if (nsnull == selector) { // ran out, it matched
nsIStyleRule* iRule;
if (NS_OK == aRule->QueryInterface(kIStyleRuleIID, (void**)&iRule)) {
data->mResults->AppendElement(iRule);
data->mCount++;
NS_RELEASE(iRule);
iRule = aRule->GetImportantRule();
if (nsnull != iRule) {
data->mResults->AppendElement(iRule);
data->mCount++;
NS_RELEASE(iRule);
}
}
}
}
}
#ifdef DEBUG_RULES
static PRBool ContentEnumWrap(nsISupports* aRule, void* aData)
{
ContentEnumFunc((nsICSSStyleRule*)aRule, aData);
return PR_TRUE;
}
#endif
PRInt32 CSSStyleSheetImpl::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;
nsIAtom* presMedium = nsnull;
aPresContext->GetMedium(presMedium);
nsICSSStyleSheet* child = mFirstChild;
while (nsnull != child) {
PRBool mediumOK = PR_FALSE;
PRInt32 mediumCount;
child->GetMediumCount(mediumCount);
if (0 < mediumCount) {
PRInt32 index = 0;
nsIAtom* medium;
while ((PR_FALSE == mediumOK) && (index < mediumCount)) {
child->GetMediumAt(index++, medium);
if ((medium == nsLayoutAtoms::all) || (medium == presMedium)) {
mediumOK = PR_TRUE;
}
NS_RELEASE(medium);
}
}
else {
mediumOK = PR_TRUE;
}
if (mediumOK) {
matchCount += child->RulesMatching(aPresContext, aContent, aParentContext, aResults);
}
child = ((CSSStyleSheetImpl*)child)->mNext;
}
if (mWeightedRules.IsNotNull()) {
if (nsnull == mRuleHash) {
BuildHash();
}
ContentEnumData data(aPresContext, aContent, aParentContext, aResults);
nsIAtom* tagAtom;
aContent->GetTag(tagAtom);
nsIAtom* idAtom = nsnull;
nsVoidArray classArray; // XXX need to recycle this guy (or make nsAutoVoidArray?)
nsIHTMLContent* htmlContent;
if (NS_OK == aContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent)) {
htmlContent->GetID(idAtom);
htmlContent->GetClasses(classArray);
NS_RELEASE(htmlContent);
}
mRuleHash->EnumerateAllRules(tagAtom, idAtom, classArray, ContentEnumFunc, &data);
matchCount += data.mCount;
#ifdef DEBUG_RULES
nsISupportsArray* list1;
nsISupportsArray* list2;
NS_NewISupportsArray(&list1);
NS_NewISupportsArray(&list2);
data.mResults = list1;
mRuleHash->EnumerateAllRules(tagAtom, idAtom, classArray, ContentEnumFunc, &data);
data.mResults = list2;
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);
}
NS_IF_RELEASE(presMedium);
return matchCount;
}
struct PseudoEnumData {
PseudoEnumData(nsIPresContext* aPresContext, nsIContent* aParentContent,
nsIAtom* aPseudoTag, nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
mPresContext = aPresContext;
mParentContent = aParentContent;
mPseudoTag = aPseudoTag;
mParentContext = aParentContext;
mResults = aResults;
mCount = 0;
}
nsIPresContext* mPresContext;
nsIContent* mParentContent;
nsIAtom* mPseudoTag;
nsIStyleContext* mParentContext;
nsISupportsArray* mResults;
PRInt32 mCount;
};
static void PseudoEnumFunc(nsICSSStyleRule* aRule, void* aData)
{
PseudoEnumData* data = (PseudoEnumData*)aData;
nsCSSSelector* selector = aRule->FirstSelector();
if (selector->mTag == data->mPseudoTag) {
selector = selector->mNext;
nsIContent* content = data->mParentContent;
nsIContent* lastContent = nsnull;
NS_IF_ADDREF(content);
while ((nsnull != selector) && (nsnull != content)) { // check compound selectors
if (SelectorMatches(data->mPresContext, selector, content)) {
selector = selector->mNext;
}
lastContent = content;
content->GetParent(content);
NS_IF_RELEASE(lastContent);
}
NS_IF_RELEASE(content);
if (nsnull == selector) { // ran out, it matched
nsIStyleRule* iRule;
if (NS_OK == aRule->QueryInterface(kIStyleRuleIID, (void**)&iRule)) {
data->mResults->AppendElement(iRule);
data->mCount++;
NS_RELEASE(iRule);
iRule = aRule->GetImportantRule();
if (nsnull != iRule) {
data->mResults->AppendElement(iRule);
data->mCount++;
NS_RELEASE(iRule);
}
}
}
}
}
#ifdef DEBUG_RULES
static PRBool PseudoEnumWrap(nsISupports* aRule, void* aData)
{
PseudoEnumFunc((nsICSSStyleRule*)aRule, aData);
return PR_TRUE;
}
#endif
PRInt32 CSSStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
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");
PRInt32 matchCount = 0;
nsIAtom* presMedium = nsnull;
aPresContext->GetMedium(presMedium);
nsICSSStyleSheet* child = mFirstChild;
while (nsnull != child) {
PRBool mediumOK = PR_FALSE;
PRInt32 mediumCount;
child->GetMediumCount(mediumCount);
if (0 < mediumCount) {
PRInt32 index = 0;
nsIAtom* medium;
while ((PR_FALSE == mediumOK) && (index < mediumCount)) {
child->GetMediumAt(index++, medium);
if ((medium == nsLayoutAtoms::all) || (medium == presMedium)) {
mediumOK = PR_TRUE;
}
NS_RELEASE(medium);
}
}
else {
mediumOK = PR_TRUE;
}
if (mediumOK) {
matchCount += child->RulesMatching(aPresContext, aParentContent, aPseudoTag,
aParentContext, aResults);
}
child = ((CSSStyleSheetImpl*)child)->mNext;
}
if (mWeightedRules.IsNotNull()) {
if (nsnull == mRuleHash) {
BuildHash();
}
PseudoEnumData data(aPresContext, aParentContent, aPseudoTag, aParentContext, aResults);
mRuleHash->EnumerateTagRules(aPseudoTag, PseudoEnumFunc, &data);
matchCount += data.mCount;
#ifdef DEBUG_RULES
nsISupportsArray* list1;
nsISupportsArray* list2;
NS_NewISupportsArray(&list1);
NS_NewISupportsArray(&list2);
data.mResults = list1;
mRuleHash->EnumerateTagRules(aPseudoTag, PseudoEnumFunc, &data);
data.mResults = list2;
mWeightedRules->EnumerateBackwards(PseudoEnumWrap, &data);
NS_ASSERTION(list1->Equals(list2), "lists not equal");
NS_RELEASE(list1);
NS_RELEASE(list2);
#endif
}
NS_IF_RELEASE(presMedium);
return matchCount;
}
NS_IMETHODIMP
CSSStyleSheetImpl::Init(nsIURL* aURL)
{
NS_PRECONDITION(aURL, "null ptr");
if (! aURL)
return NS_ERROR_NULL_POINTER;
NS_ASSERTION(mURL.IsNull(), "already initialized");
if (mURL.IsNotNull())
return NS_ERROR_ALREADY_INITIALIZED;
mURL.SetAddRef(aURL);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetURL(nsIURL*& aURL) const
{
const nsIURL* url = mURL;
aURL = (nsIURL*)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
{
aCount = ((nsnull != mMedia) ? mMedia->Count() : 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::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::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;
}
PRBool CSSStyleSheetImpl::ContainsStyleSheet(nsIURL* aURL) const
{
NS_PRECONDITION(nsnull != aURL, "null arg");
PRBool result = mURL->Equals(aURL);
const nsICSSStyleSheet* child = mFirstChild;
while ((PR_FALSE == result) && (nsnull != child)) {
result = child->ContainsStyleSheet(aURL);
child = ((const CSSStyleSheetImpl*)child)->mNext;
}
return result;
}
void CSSStyleSheetImpl::AppendStyleSheet(nsICSSStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (mFirstChild.IsNull()) {
mFirstChild.SetAddRef(aSheet);
}
else {
nsICSSStyleSheet* child = mFirstChild;
while (((CSSStyleSheetImpl*)child)->mNext.IsNotNull()) {
child = ((CSSStyleSheetImpl*)child)->mNext;
}
((CSSStyleSheetImpl*)child)->mNext.SetAddRef(aSheet);
}
// This is not reference counted. Our parent tells us when
// it's going away.
((CSSStyleSheetImpl*)aSheet)->mParent = this;
}
void CSSStyleSheetImpl::PrependStyleRule(nsICSSStyleRule* aRule)
{
NS_PRECONDITION(nsnull != aRule, "null arg");
ClearHash();
//XXX replace this with a binary search?
PRInt32 weight = aRule->GetWeight();
if (mWeightedRules.IsNull()) {
if (NS_OK != NS_NewISupportsArray(mWeightedRules.AssignPtr()))
return;
}
if (mOrderedRules.IsNull()) {
if (NS_OK != NS_NewISupportsArray(mOrderedRules.AssignPtr()))
return;
}
PRInt32 index = mWeightedRules->Count();
while (0 <= --index) {
nsICSSStyleRule* rule = (nsICSSStyleRule*)mWeightedRules->ElementAt(index);
if (rule->GetWeight() >= weight) { // insert before rules with equal or lesser weight
NS_RELEASE(rule);
break;
}
NS_RELEASE(rule);
}
mWeightedRules->InsertElementAt(aRule, index + 1);
mOrderedRules->InsertElementAt(aRule, 0);
aRule->SetStyleSheet(this);
}
void CSSStyleSheetImpl::AppendStyleRule(nsICSSStyleRule* aRule)
{
NS_PRECONDITION(nsnull != aRule, "null arg");
ClearHash();
//XXX replace this with a binary search?
PRInt32 weight = aRule->GetWeight();
if (mWeightedRules.IsNull()) {
if (NS_OK != NS_NewISupportsArray(mWeightedRules.AssignPtr()))
return;
}
if (mOrderedRules.IsNull()) {
if (NS_OK != NS_NewISupportsArray(mOrderedRules.AssignPtr()))
return;
}
PRInt32 count = mWeightedRules->Count();
PRInt32 index = -1;
while (++index < count) {
nsICSSStyleRule* rule = (nsICSSStyleRule*)mWeightedRules->ElementAt(index);
if (rule->GetWeight() <= weight) { // insert after rules with greater weight (before equal or lower weight)
NS_RELEASE(rule);
break;
}
NS_RELEASE(rule);
}
mWeightedRules->InsertElementAt(aRule, index);
mOrderedRules->AppendElement(aRule);
aRule->SetStyleSheet(this);
}
PRInt32 CSSStyleSheetImpl::StyleRuleCount(void) const
{
if (mOrderedRules.IsNotNull()) {
return mOrderedRules->Count();
}
return 0;
}
nsresult CSSStyleSheetImpl::GetStyleRuleAt(PRInt32 aIndex, nsICSSStyleRule*& aRule) const
{
nsresult result = NS_ERROR_ILLEGAL_VALUE;
if (mOrderedRules.IsNotNull()) {
aRule = (nsICSSStyleRule*)mOrderedRules->ElementAt(aIndex);
if (nsnull != aRule) {
result = NS_OK;
}
}
else {
aRule = nsnull;
}
return result;
}
PRInt32 CSSStyleSheetImpl::StyleSheetCount(void) 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.
PRInt32 count = 0;
if (mFirstChild.IsNotNull()) {
const nsICSSStyleSheet* child = mFirstChild;
while (nsnull != child) {
count++;
child = ((const CSSStyleSheetImpl*)child)->mNext;
}
}
return count;
}
nsresult 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.IsNotNull()) {
const nsICSSStyleSheet* child = mFirstChild;
while ((nsnull != child) && (0 != aIndex)) {
--aIndex;
child = ((const CSSStyleSheetImpl*)child)->mNext;
}
aSheet = (nsICSSStyleSheet*)child;
NS_IF_ADDREF(aSheet);
}
return NS_OK;
}
void CSSStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
{
PRUnichar* buffer;
PRInt32 index;
// Indent
for (index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("CSS Style Sheet: ", out);
mURL->ToString(&buffer);
fputs(buffer, out);
fputs("\n", out);
delete buffer;
const nsICSSStyleSheet* child = mFirstChild;
while (nsnull != child) {
child->List(out, aIndent + 1);
child = ((CSSStyleSheetImpl*)child)->mNext;
}
PRInt32 count = (mWeightedRules.IsNotNull() ? mWeightedRules->Count() : 0);
for (index = 0; index < count; index++) {
nsICSSStyleRulePtr rule = (nsICSSStyleRule*)mWeightedRules->ElementAt(index);
rule->List(out, aIndent);
}
}
void CSSStyleSheetImpl::ClearHash(void)
{
if (nsnull != mRuleHash) {
delete mRuleHash;
mRuleHash = nsnull;
}
}
static
PRBool BuildHashEnum(nsISupports* aRule, void* aHash)
{
nsICSSStyleRule* rule = (nsICSSStyleRule*)aRule;
RuleHash* hash = (RuleHash*)aHash;
hash->AppendRule(rule);
return PR_TRUE;
}
void CSSStyleSheetImpl::BuildHash(void)
{
NS_ASSERTION(nsnull == mRuleHash, "clear rule hash first");
mRuleHash = new RuleHash();
if ((nsnull != mRuleHash) && mWeightedRules.IsNotNull()) {
mWeightedRules->EnumerateBackwards(BuildHashEnum, mRuleHash);
}
}
// 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 (mURL.IsNotNull()) {
PRUnichar* str;
mURL->ToString(&str);
aHref = str;
delete 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) {
PRInt32 count = mMedia->Count();
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;
nsresult result = NS_NewCSSParser(&css);
if (NS_OK == result) {
nsAutoString str(aRule);
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, mURL, tmp);
NS_ASSERTION(tmp == this, "parser incorrectly created a new stylesheet");
NS_RELEASE(tmp);
NS_RELEASE(input);
*aReturn = mOrderedRules->Count();
}
NS_RELEASE(css);
}
return result;
}
NS_IMETHODIMP
CSSStyleSheetImpl::DeleteRule(PRUint32 aIndex)
{
// XXX TBI: handle @rule types
nsICSSStyleRule *rule;
rule = (nsICSSStyleRule *)mOrderedRules->ElementAt(aIndex);
if (nsnull != rule) {
mOrderedRules->RemoveElementAt(aIndex);
mWeightedRules->RemoveElement(rule);
rule->SetStyleSheet(nsnull);
NS_RELEASE(rule);
}
return NS_OK;
}
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, nsIURL* 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;
}
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