/* -*- 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 "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 "prlog.h" //#define DEBUG_REFS //#define DEBUG_RULES #define DEBUG_CASCADE 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 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)); } } } // ------------------------------- // 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 ClearRuleCascades(void); virtual void RebuildNameSpaces(void); nsVoidArray mSheets; nsIURL* mURL; nsISupportsArray* mOrderedRules; nsHashtable* mMediumCascadeTable; nsINameSpace* mNameSpace; PRInt32 mDefaultNameSpaceID; }; //-------------------------------- 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 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(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 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); virtual PRInt32 RulesMatching(nsIPresContext* aPresContext, nsIContent* aContent, nsIStyleContext* aParentContext, nsISupportsArray* aResults); virtual PRInt32 RulesMatching(nsIPresContext* aPresContext, nsIContent* aParentContent, nsIAtom* aPseudoTag, nsIStyleContext* aParentContext, nsISupportsArray* aResults); NS_IMETHOD HasStateDependentStyle(nsIPresContext* aPresContext, nsIContent* aContent); NS_IMETHOD ContainsStyleSheet(nsIURL* 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); #ifdef DEBUG_CASCADE nsresult SlowCascadeRulesInto(nsIAtom* aMedium, nsISupportsArray* aRules); #endif nsresult GatherRulesFor(nsIAtom* aMedium, nsISupportsArray* aRules); nsresult CascadeRulesInto(nsIAtom* aMedium, nsISupportsArray* aRules); RuleCascadeData* GetRuleCascade(nsIAtom* aMedium); 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; }; // ------------------------------- // 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), mMediumCascadeTable(nsnull), mNameSpace(nsnull), mDefaultNameSpaceID(kNameSpaceID_None) { 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), mMediumCascadeTable(nsnull), mNameSpace(nsnull), mDefaultNameSpaceID(aCopy.mDefaultNameSpaceID) { 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) { NS_IF_RELEASE(mURL); if (mOrderedRules) { mOrderedRules->EnumerateForwards(SetStyleSheetReference, nsnull); NS_RELEASE(mOrderedRules); } ClearRuleCascades(); 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 DeleteRuleCascade(nsHashKey* aKey, void* aValue, void* closure) { delete ((RuleCascadeData*)aValue); return PR_TRUE; } void CSSStyleSheetInner::ClearRuleCascades(void) { if (mMediumCascadeTable) { mMediumCascadeTable->Enumerate(DeleteRuleCascade, nsnull); delete mMediumCascadeTable; mMediumCascadeTable = nsnull; } } 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); } } } #ifdef DEBUG_REFS static PRInt32 gInstanceCount; #endif CSSStyleSheetImpl::CSSStyleSheetImpl() : nsICSSStyleSheet(), mTitle(), mMedia(nsnull), mFirstChild(nsnull), mNext(nsnull), mParent(nsnull), mImportsCollection(nsnull), mRuleCollection(nsnull), mDocument(nsnull), mOwningNode(nsnull), mDisabled(PR_FALSE), mScriptObject(nsnull), mDirty(PR_FALSE) { NS_INIT_REFCNT(); nsCSSAtoms::AddrefAtoms(); mInner = new CSSStyleSheetInner(this); #ifdef DEBUG_REFS ++gInstanceCount; fprintf(stdout, "%d + CSSStyleSheet size: %d\n", gInstanceCount, sizeof(*this)); #endif } 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), mScriptObject(nsnull), mInner(aCopy.mInner), mDirty(PR_FALSE) { NS_INIT_REFCNT(); nsCSSAtoms::AddrefAtoms(); 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); } #ifdef DEBUG_REFS ++gInstanceCount; fprintf(stdout, "%d + CSSStyleSheet size: %d\n", gInstanceCount, sizeof(*this)); #endif } CSSStyleSheetImpl::~CSSStyleSheetImpl() { #ifdef DEBUG_REFS --gInstanceCount; fprintf(stdout, "%d - CSSStyleSheet\n", gInstanceCount); #endif 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. 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, 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, 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::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)); } /* XXX Rod, uncomment this to enable the drag over pseudo-class else if (nsCSSAtoms::dragOverPseudo == pseudoClass->mAtom) { result = PRBool(0 != (eventState & NS_EVENT_STATE_DRAG_OVER)); } */ } } 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) { 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; NS_MakeAbsoluteURL(docURL, base, href, absURLSpec); NS_IF_RELEASE(docURL); linkHandler->GetLinkState(absURLSpec.GetUnicode(), linkState); } } } 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; mCount = 0; } nsIPresContext* mPresContext; nsIContent* mContent; nsIStyleContext* mParentContext; nsISupportsArray* mResults; PRInt32 mCount; }; 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); 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); RuleCascadeData* cascade = GetRuleCascade(presMedium); if (cascade) { 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?) 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); matchCount += data.mCount; #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); } 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; 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); 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); RuleCascadeData* cascade = GetRuleCascade(presMedium); if (cascade) { PseudoEnumData data(aPresContext, aParentContent, aPseudoTag, aParentContext, aResults); cascade->mRuleHash.EnumerateTagRules(aPseudoTag, PseudoEnumFunc, &data); matchCount += data.mCount; #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 } NS_IF_RELEASE(presMedium); return matchCount; } 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; } // Test if style is dependent on content state NS_IMETHODIMP CSSStyleSheetImpl::HasStateDependentStyle(nsIPresContext* aPresContext, nsIContent* aContent) { PRBool isStateful = PR_FALSE; nsIAtom* presMedium = nsnull; aPresContext->GetMedium(&presMedium); RuleCascadeData* cascade = GetRuleCascade(presMedium); if (cascade) { // look up content in state rule list StateEnumData data(aPresContext, aContent); isStateful = (! cascade->mStateSelectors.EnumerateForwards(StateEnumFunc, &data)); // if stopped, have state } NS_IF_RELEASE(presMedium); return ((isStateful) ? NS_OK : NS_COMFALSE); } NS_IMETHODIMP CSSStyleSheetImpl::Init(nsIURL* 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) { NS_ASSERTION(mInner->mURL->Equals(aURL), "bad inner"); } else { mInner->mURL = aURL; NS_ADDREF(mInner->mURL); } return NS_OK; } NS_IMETHODIMP CSSStyleSheetImpl::GetURL(nsIURL*& aURL) const { const nsIURL* url = ((mInner) ? mInner->mURL : nsnull); 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 { 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(nsIURL* aURL) const { NS_PRECONDITION(nsnull != aURL, "null arg"); PRBool result = mInner->mURL->Equals(aURL); 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; }; 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; } void CSSStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const { PRUnichar* buffer; 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); mInner->mURL->ToString(&buffer); nsAutoString as(buffer,0); delete [] buffer; fputs(as, out); if (mMedia) { fputs(" media: ", out); PRUint32 index = 0; PRUint32 count; mMedia->Count(&count); while (index < count) { nsIAtom* medium = (nsIAtom*)mMedia->ElementAt(index++); medium->ToString(as); fputs(as, out); if (index < 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); if (mInner->mMediumCascadeTable) { ListEnumData data(out, aIndent); mInner->mMediumCascadeTable->Enumerate(ListCascade, &data); } } void CSSStyleSheetImpl::ClearRuleCascades(void) { mInner->ClearRuleCascades(); 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; } 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::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::selectedPseudo) || (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; }; static PRBool GatherStyleRulesForMedium(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; data->mRules->AppendElement(styleRule); } else if (nsICSSRule::MEDIA_RULE == type) { nsICSSMediaRule* mediaRule = (nsICSSMediaRule*)rule; if (NS_OK == mediaRule->UseForMedium(data->mMedium)) { mediaRule->EnumerateRulesForwards(GatherStyleRulesForMedium, aData); } } return PR_TRUE; } nsresult CSSStyleSheetImpl::GatherRulesFor(nsIAtom* aMedium, nsISupportsArray* aRules) { if (aRules) { CSSStyleSheetImpl* child = mFirstChild; while (nsnull != child) { if (NS_OK == child->UseForMedium(aMedium)) { child->GatherRulesFor(aMedium, aRules); } child = child->mNext; } if (mInner && mInner->mOrderedRules) { CascadeEnumData data(aMedium, aRules); mInner->mOrderedRules->EnumerateForwards(GatherStyleRulesForMedium, &data); } } return NS_OK; } #ifdef DEBUG_CASCADE 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; } nsresult CSSStyleSheetImpl::SlowCascadeRulesInto(nsIAtom* aMedium, nsISupportsArray* aRules) { if (aRules) { // get child rules first CSSStyleSheetImpl* child = mFirstChild; while (nsnull != child) { if (NS_OK == child->UseForMedium(aMedium)) { child->SlowCascadeRulesInto(aMedium, aRules); } child = child->mNext; } if (mInner && mInner->mOrderedRules) { CascadeEnumData data(aMedium, aRules); mInner->mOrderedRules->EnumerateForwards(InsertRuleByWeight, &data); } } return NS_OK; } #endif static PRInt32 CompareStyleRuleWeight(nsISupports* aRule1, nsISupports* aRule2, void* aData) { nsICSSStyleRule* rule1 = (nsICSSStyleRule*)aRule1; nsICSSStyleRule* rule2 = (nsICSSStyleRule*)aRule2; return (rule2->GetWeight() - rule1->GetWeight()); } nsresult CSSStyleSheetImpl::CascadeRulesInto(nsIAtom* aMedium, nsISupportsArray* aRules) { #ifdef FAST_CASCADE if (aRules) { GatherRulesFor(aMedium, aRules); aRules->ShellSort(CompareStyleRuleWeight, nsnull); #ifdef DEBUG_CASCADE nsISupportsArray* verifyArray = nsnull; NS_NewISupportsArray(&verifyArray); if (verifyArray) { SlowCascadeRulesInto(aMedium, verifyArray); NS_ASSERTION(verifyArray->Equals(aRules), "fast cascade failed"); NS_RELEASE(verifyArray); } #endif } return NS_OK; #else return SlowCascadeRulesInto(aMedium, aRules); #endif } RuleCascadeData* CSSStyleSheetImpl::GetRuleCascade(nsIAtom* aMedium) { AtomKey mediumKey(aMedium); RuleCascadeData* cascade = nsnull; if (mInner) { if (mInner->mMediumCascadeTable) { cascade = (RuleCascadeData*)mInner->mMediumCascadeTable->Get(&mediumKey); } if (! cascade) { if (mInner->mOrderedRules || mFirstChild) { if (! mInner->mMediumCascadeTable) { mInner->mMediumCascadeTable = new nsHashtable(); } if (mInner->mMediumCascadeTable) { cascade = new RuleCascadeData(); if (cascade) { mInner->mMediumCascadeTable->Put(&mediumKey, cascade); CascadeRulesInto(aMedium, cascade->mWeightedRules); cascade->mWeightedRules->EnumerateBackwards(BuildHashEnum, &(cascade->mRuleHash)); cascade->mWeightedRules->EnumerateBackwards(BuildStateEnum, &(cascade->mStateSelectors)); } } } } } return cascade; } // 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) { PRUnichar* str; mInner->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) { 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, 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; }