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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 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Daniel Glazman <glazman@netscape.com>
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nscore.h"
#define PL_ARENA_CONST_ALIGN_MASK 7
#define NS_RULEHASH_ARENA_BLOCK_SIZE (256)
#include "plarena.h"
#include "nsICSSStyleSheet.h"
#include "nsIArena.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsISupportsArray.h"
#include "pldhash.h"
#include "nsHashtable.h"
#include "nsICSSPseudoComparator.h"
#include "nsICSSStyleRuleProcessor.h"
#include "nsICSSStyleRule.h"
#include "nsICSSNameSpaceRule.h"
#include "nsICSSMediaRule.h"
#include "nsIMediaList.h"
#include "nsIHTMLContent.h"
#include "nsIDocument.h"
#include "nsIHTMLContentContainer.h"
#include "nsIPresContext.h"
#include "nsIEventStateManager.h"
#include "nsHTMLAtoms.h"
#include "nsLayoutAtoms.h"
#include "nsIFrame.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsVoidArray.h"
#include "nsIUnicharInputStream.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLLinkElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsIDOMStyleSheetList.h"
#include "nsIDOMCSSStyleSheet.h"
#include "nsIDOMCSSStyleRule.h"
#include "nsIDOMCSSImportRule.h"
#include "nsIDOMCSSRuleList.h"
#include "nsIDOMMediaList.h"
#include "nsIDOMNode.h"
#include "nsDOMError.h"
#include "nsIPresShell.h"
#include "nsICSSParser.h"
#include "nsICSSLoader.h"
#include "nsICSSLoaderObserver.h"
#include "nsRuleWalker.h"
#include "nsCSSPseudoClasses.h"
#include "nsINameSpaceManager.h"
#include "nsINameSpace.h"
#include "nsITextContent.h"
#include "prlog.h"
#include "nsCOMPtr.h"
#include "nsIStyleSet.h"
#include "nsISizeOfHandler.h"
#include "nsStyleUtil.h"
#include "nsQuickSort.h"
#ifdef MOZ_XUL
#include "nsIXULContent.h"
#endif
#include "nsContentUtils.h"
#include "nsIJSContextStack.h"
#include "nsIScriptSecurityManager.h"
// An |AtomKey| is to be used for storage in the hashtable, and a
// |DependentAtomKey| should be used on the stack to avoid the performance
// cost of refcounting an atom that one is assured to own for the lifetime
// of the key.
class AtomKey_base : public nsHashKey {
public:
virtual PRUint32 HashCode(void) const;
virtual PRBool Equals(const nsHashKey *aKey) const;
nsIAtom* mAtom;
};
class AtomKey : public AtomKey_base {
public:
AtomKey(nsIAtom* aAtom);
AtomKey(const AtomKey_base& aKey);
virtual ~AtomKey();
virtual nsHashKey *Clone(void) const;
};
class DependentAtomKey : public AtomKey_base {
public:
DependentAtomKey(nsIAtom* aAtom)
{
mAtom = aAtom;
}
DependentAtomKey(const DependentAtomKey& aKey);
virtual ~DependentAtomKey(void);
virtual nsHashKey *Clone(void) const;
};
PRUint32 AtomKey_base::HashCode(void) const
{
return NS_PTR_TO_INT32(mAtom);
}
PRBool AtomKey_base::Equals(const nsHashKey* aKey) const
{
return NS_STATIC_CAST(const AtomKey_base*, aKey)->mAtom == mAtom;
}
AtomKey::AtomKey(nsIAtom* aAtom)
{
mAtom = aAtom;
NS_ADDREF(mAtom);
}
AtomKey::AtomKey(const AtomKey_base& aKey)
{
mAtom = aKey.mAtom;
NS_ADDREF(mAtom);
}
AtomKey::~AtomKey()
{
NS_RELEASE(mAtom);
}
nsHashKey* AtomKey::Clone(void) const
{
return new AtomKey(*this);
}
DependentAtomKey::DependentAtomKey(const DependentAtomKey& aKey)
{
NS_NOTREACHED("Should never clone to a dependent atom key.");
mAtom = aKey.mAtom;
}
DependentAtomKey::~DependentAtomKey()
{
}
nsHashKey* DependentAtomKey::Clone(void) const
{
return new AtomKey(*this); // return a non-dependent key
}
struct RuleValue {
RuleValue(nsICSSStyleRule* aRule, PRInt32 aIndex, RuleValue *aNext)
: mRule(aRule), mIndex(aIndex), mNext(aNext) {}
// CAUTION: ~RuleValue will never get called as RuleValues are arena
// allocated and arena cleanup will take care of deleting memory.
// Add code to RuleHash::~RuleHash to get it to call the destructor
// if any more cleanup needs to happen.
~RuleValue(void)
{
// Rule values are arena allocated. No need for any deletion.
}
// Placement new to arena allocate the RuleValues
void *operator new(size_t aSize, PLArenaPool &aArena) CPP_THROW_NEW {
void *mem;
PL_ARENA_ALLOCATE(mem, &aArena, aSize);
return mem;
}
nsICSSStyleRule* mRule;
PRInt32 mIndex; // High index means low weight/order.
RuleValue* mNext;
};
// ------------------------------
// Rule hash table
//
// Uses any of the sets of ops below.
struct RuleHashTableEntry : public PLDHashEntryHdr {
RuleValue *mRules; // linked list of |RuleValue|, null-terminated
};
PR_STATIC_CALLBACK(PLDHashNumber)
RuleHash_CIHashKey(PLDHashTable *table, const void *key)
{
nsIAtom *atom = NS_CONST_CAST(nsIAtom*, NS_STATIC_CAST(const nsIAtom*, key));
nsAutoString str;
atom->ToString(str);
ToUpperCase(str);
return HashString(str);
}
PR_STATIC_CALLBACK(PRBool)
RuleHash_CIMatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
const void *key)
{
nsIAtom *match_atom = NS_CONST_CAST(nsIAtom*, NS_STATIC_CAST(const nsIAtom*,
key));
// Use the |getKey| callback to avoid code duplication.
// XXX Ugh! Why does |getKey| have different |const|-ness?
nsIAtom *entry_atom = NS_CONST_CAST(nsIAtom*, NS_STATIC_CAST(const nsIAtom*,
table->ops->getKey(table, NS_CONST_CAST(PLDHashEntryHdr*, hdr))));
// Check for case-sensitive match first.
if (match_atom == entry_atom)
return PR_TRUE;
const PRUnichar *match_str, *entry_str;
match_atom->GetUnicode(&match_str);
entry_atom->GetUnicode(&entry_str);
return nsDependentString(match_str).Equals(nsDependentString(entry_str),
nsCaseInsensitiveStringComparator());
}
PR_STATIC_CALLBACK(PRBool)
RuleHash_CSMatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
const void *key)
{
nsIAtom *match_atom = NS_CONST_CAST(nsIAtom*, NS_STATIC_CAST(const nsIAtom*,
key));
// Use the |getKey| callback to avoid code duplication.
// XXX Ugh! Why does |getKey| have different |const|-ness?
nsIAtom *entry_atom = NS_CONST_CAST(nsIAtom*, NS_STATIC_CAST(const nsIAtom*,
table->ops->getKey(table, NS_CONST_CAST(PLDHashEntryHdr*, hdr))));
return match_atom == entry_atom;
}
PR_STATIC_CALLBACK(const void*)
RuleHash_TagTable_GetKey(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*, hdr);
return entry->mRules->mRule->FirstSelector()->mTag;
}
PR_STATIC_CALLBACK(const void*)
RuleHash_ClassTable_GetKey(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*, hdr);
return entry->mRules->mRule->FirstSelector()->mClassList->mAtom;
}
PR_STATIC_CALLBACK(const void*)
RuleHash_IdTable_GetKey(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*, hdr);
return entry->mRules->mRule->FirstSelector()->mIDList->mAtom;
}
PR_STATIC_CALLBACK(const void*)
RuleHash_NameSpaceTable_GetKey(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*, hdr);
return NS_INT32_TO_PTR(entry->mRules->mRule->FirstSelector()->mNameSpace);
}
PR_STATIC_CALLBACK(PLDHashNumber)
RuleHash_NameSpaceTable_HashKey(PLDHashTable *table, const void *key)
{
return NS_PTR_TO_INT32(key);
}
PR_STATIC_CALLBACK(PRBool)
RuleHash_NameSpaceTable_MatchEntry(PLDHashTable *table,
const PLDHashEntryHdr *hdr,
const void *key)
{
const RuleHashTableEntry *entry =
NS_STATIC_CAST(const RuleHashTableEntry*, hdr);
return NS_PTR_TO_INT32(key) ==
entry->mRules->mRule->FirstSelector()->mNameSpace;
}
static PLDHashTableOps RuleHash_TagTable_Ops = {
PL_DHashAllocTable,
PL_DHashFreeTable,
RuleHash_TagTable_GetKey,
PL_DHashVoidPtrKeyStub,
RuleHash_CSMatchEntry,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub,
NULL
};
// Case-sensitive ops.
static PLDHashTableOps RuleHash_ClassTable_CSOps = {
PL_DHashAllocTable,
PL_DHashFreeTable,
RuleHash_ClassTable_GetKey,
PL_DHashVoidPtrKeyStub,
RuleHash_CSMatchEntry,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub,
NULL
};
// Case-insensitive ops.
static PLDHashTableOps RuleHash_ClassTable_CIOps = {
PL_DHashAllocTable,
PL_DHashFreeTable,
RuleHash_ClassTable_GetKey,
RuleHash_CIHashKey,
RuleHash_CIMatchEntry,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub,
NULL
};
// Case-sensitive ops.
static PLDHashTableOps RuleHash_IdTable_CSOps = {
PL_DHashAllocTable,
PL_DHashFreeTable,
RuleHash_IdTable_GetKey,
PL_DHashVoidPtrKeyStub,
RuleHash_CSMatchEntry,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub,
NULL
};
// Case-insensitive ops.
static PLDHashTableOps RuleHash_IdTable_CIOps = {
PL_DHashAllocTable,
PL_DHashFreeTable,
RuleHash_IdTable_GetKey,
RuleHash_CIHashKey,
RuleHash_CIMatchEntry,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub,
NULL
};
static PLDHashTableOps RuleHash_NameSpaceTable_Ops = {
PL_DHashAllocTable,
PL_DHashFreeTable,
RuleHash_NameSpaceTable_GetKey,
RuleHash_NameSpaceTable_HashKey,
RuleHash_NameSpaceTable_MatchEntry,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub,
NULL
};
#undef RULE_HASH_STATS
#undef PRINT_UNIVERSAL_RULES
#ifdef DEBUG_dbaron
#define RULE_HASH_STATS
#define PRINT_UNIVERSAL_RULES
#endif
#ifdef RULE_HASH_STATS
#define RULE_HASH_STAT_INCREMENT(var_) PR_BEGIN_MACRO ++(var_); PR_END_MACRO
#else
#define RULE_HASH_STAT_INCREMENT(var_) PR_BEGIN_MACRO PR_END_MACRO
#endif
// Enumerator callback function.
typedef void (*RuleEnumFunc)(nsICSSStyleRule* aRule, void *aData);
class RuleHash {
public:
RuleHash(PRBool aQuirksMode);
~RuleHash();
void PrependRule(nsICSSStyleRule* aRule);
void EnumerateAllRules(PRInt32 aNameSpace, nsIAtom* aTag, nsIAtom* aID,
const nsVoidArray& aClassList,
RuleEnumFunc aFunc, void* aData);
void EnumerateTagRules(nsIAtom* aTag,
RuleEnumFunc aFunc, void* aData);
protected:
void PrependRuleToTable(PLDHashTable* aTable, const void* aKey,
nsICSSStyleRule* aRule);
void PrependUniversalRule(nsICSSStyleRule* aRule);
// All rule values in these hashtables are arena allocated
PRInt32 mRuleCount;
PLDHashTable mIdTable;
PLDHashTable mClassTable;
PLDHashTable mTagTable;
PLDHashTable mNameSpaceTable;
RuleValue *mUniversalRules;
RuleValue** mEnumList;
PRInt32 mEnumListSize;
PLArenaPool mArena;
#ifdef RULE_HASH_STATS
PRUint32 mUniversalSelectors;
PRUint32 mNameSpaceSelectors;
PRUint32 mTagSelectors;
PRUint32 mClassSelectors;
PRUint32 mIdSelectors;
PRUint32 mElementsMatched;
PRUint32 mPseudosMatched;
PRUint32 mElementUniversalCalls;
PRUint32 mElementNameSpaceCalls;
PRUint32 mElementTagCalls;
PRUint32 mElementClassCalls;
PRUint32 mElementIdCalls;
PRUint32 mPseudoTagCalls;
#endif // RULE_HASH_STATS
};
RuleHash::RuleHash(PRBool aQuirksMode)
: mRuleCount(0),
mUniversalRules(nsnull),
mEnumList(nsnull), mEnumListSize(0)
#ifdef RULE_HASH_STATS
,
mUniversalSelectors(0),
mNameSpaceSelectors(0),
mTagSelectors(0),
mClassSelectors(0),
mIdSelectors(0),
mElementsMatched(0),
mPseudosMatched(0),
mElementUniversalCalls(0),
mElementNameSpaceCalls(0),
mElementTagCalls(0),
mElementClassCalls(0),
mElementIdCalls(0),
mPseudoTagCalls(0)
#endif
{
// Initialize our arena
PL_INIT_ARENA_POOL(&mArena, "RuleHashArena", NS_RULEHASH_ARENA_BLOCK_SIZE);
PL_DHashTableInit(&mTagTable, &RuleHash_TagTable_Ops, nsnull,
sizeof(RuleHashTableEntry), 64);
PL_DHashTableInit(&mIdTable,
aQuirksMode ? &RuleHash_IdTable_CIOps
: &RuleHash_IdTable_CSOps,
nsnull, sizeof(RuleHashTableEntry), 16);
PL_DHashTableInit(&mClassTable,
aQuirksMode ? &RuleHash_ClassTable_CIOps
: &RuleHash_ClassTable_CSOps,
nsnull, sizeof(RuleHashTableEntry), 16);
PL_DHashTableInit(&mNameSpaceTable, &RuleHash_NameSpaceTable_Ops, nsnull,
sizeof(RuleHashTableEntry), 16);
}
RuleHash::~RuleHash(void)
{
#ifdef RULE_HASH_STATS
printf(
"RuleHash(%p):\n"
" Selectors: Universal (%u) NameSpace(%u) Tag(%u) Class(%u) Id(%u)\n"
" Content Nodes: Elements(%u) Pseudo-Elements(%u)\n"
" Element Calls: Universal(%u) NameSpace(%u) Tag(%u) Class(%u) Id(%u)\n"
" Pseudo-Element Calls: Tag(%u)\n",
NS_STATIC_CAST(void*, this),
mUniversalSelectors, mNameSpaceSelectors, mTagSelectors,
mClassSelectors, mIdSelectors,
mElementsMatched,
mPseudosMatched,
mElementUniversalCalls, mElementNameSpaceCalls, mElementTagCalls,
mElementClassCalls, mElementIdCalls,
mPseudoTagCalls);
#ifdef PRINT_UNIVERSAL_RULES
{
RuleValue* value = mUniversalRules;
if (value) {
printf(" Universal rules:\n");
do {
nsAutoString selectorText;
PRUint32 lineNumber = value->mRule->GetLineNumber();
value->mRule->GetSourceSelectorText(selectorText);
printf(" line %d, %s\n",
lineNumber, NS_ConvertUCS2toUTF8(selectorText).get());
value = value->mNext;
} while (value);
}
}
#endif // PRINT_UNIVERSAL_RULES
#endif // RULE_HASH_STATS
// Rule Values are arena allocated no need to delete them. Their destructor
// isn't doing any cleanup. So we dont even bother to enumerate through
// the hash tables and call their destructors.
if (nsnull != mEnumList) {
delete [] mEnumList;
}
// delete arena for strings and small objects
PL_DHashTableFinish(&mIdTable);
PL_DHashTableFinish(&mClassTable);
PL_DHashTableFinish(&mTagTable);
PL_DHashTableFinish(&mNameSpaceTable);
PL_FinishArenaPool(&mArena);
}
void RuleHash::PrependRuleToTable(PLDHashTable* aTable,
const void* aKey, nsICSSStyleRule* aRule)
{
// Get a new or existing entry.
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(aTable, aKey, PL_DHASH_ADD));
if (!entry)
return;
entry->mRules = new (mArena) RuleValue(aRule, mRuleCount++, entry->mRules);
}
void RuleHash::PrependUniversalRule(nsICSSStyleRule* aRule)
{
mUniversalRules =
new (mArena) RuleValue(aRule, mRuleCount++, mUniversalRules);
}
void RuleHash::PrependRule(nsICSSStyleRule* aRule)
{
nsCSSSelector* selector = aRule->FirstSelector();
if (nsnull != selector->mIDList) {
PrependRuleToTable(&mIdTable, selector->mIDList->mAtom, aRule);
RULE_HASH_STAT_INCREMENT(mIdSelectors);
}
else if (nsnull != selector->mClassList) {
PrependRuleToTable(&mClassTable, selector->mClassList->mAtom, aRule);
RULE_HASH_STAT_INCREMENT(mClassSelectors);
}
else if (nsnull != selector->mTag) {
PrependRuleToTable(&mTagTable, selector->mTag, aRule);
RULE_HASH_STAT_INCREMENT(mTagSelectors);
}
else if (kNameSpaceID_Unknown != selector->mNameSpace) {
PrependRuleToTable(&mNameSpaceTable,
NS_INT32_TO_PTR(selector->mNameSpace), aRule);
RULE_HASH_STAT_INCREMENT(mNameSpaceSelectors);
}
else { // universal tag selector
PrependUniversalRule(aRule);
RULE_HASH_STAT_INCREMENT(mUniversalSelectors);
}
}
// this should cover practically all cases so we don't need to reallocate
#define MIN_ENUM_LIST_SIZE 8
#ifdef RULE_HASH_STATS
#define RULE_HASH_STAT_INCREMENT_LIST_COUNT(list_, var_) \
do { ++(var_); (list_) = (list_)->mNext; } while (list_)
#else
#define RULE_HASH_STAT_INCREMENT_LIST_COUNT(list_, var_) \
PR_BEGIN_MACRO PR_END_MACRO
#endif
void RuleHash::EnumerateAllRules(PRInt32 aNameSpace, nsIAtom* aTag,
nsIAtom* aID, const nsVoidArray& aClassList,
RuleEnumFunc aFunc, void* aData)
{
PRInt32 classCount = aClassList.Count();
// assume 1 universal, tag, id, and namespace, rather than wasting
// time counting
PRInt32 testCount = classCount + 4;
if (mEnumListSize < testCount) {
delete [] mEnumList;
mEnumListSize = PR_MAX(testCount, MIN_ENUM_LIST_SIZE);
mEnumList = new RuleValue*[mEnumListSize];
}
PRInt32 valueCount = 0;
RULE_HASH_STAT_INCREMENT(mElementsMatched);
{ // universal rules
RuleValue* value = mUniversalRules;
if (nsnull != value) {
mEnumList[valueCount++] = value;
RULE_HASH_STAT_INCREMENT_LIST_COUNT(value, mElementUniversalCalls);
}
}
// universal rules within the namespace
if (kNameSpaceID_Unknown != aNameSpace) {
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(&mNameSpaceTable, NS_INT32_TO_PTR(aNameSpace),
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
RuleValue *value = entry->mRules;
mEnumList[valueCount++] = value;
RULE_HASH_STAT_INCREMENT_LIST_COUNT(value, mElementNameSpaceCalls);
}
}
if (nsnull != aTag) {
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(&mTagTable, aTag, PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
RuleValue *value = entry->mRules;
mEnumList[valueCount++] = value;
RULE_HASH_STAT_INCREMENT_LIST_COUNT(value, mElementTagCalls);
}
}
if (nsnull != aID) {
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(&mIdTable, aID, PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
RuleValue *value = entry->mRules;
mEnumList[valueCount++] = value;
RULE_HASH_STAT_INCREMENT_LIST_COUNT(value, mElementIdCalls);
}
}
{ // extra scope to work around compiler bugs with |for| scoping.
for (PRInt32 index = 0; index < classCount; ++index) {
nsIAtom* classAtom = (nsIAtom*)aClassList.ElementAt(index);
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(&mClassTable, classAtom, PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
RuleValue *value = entry->mRules;
mEnumList[valueCount++] = value;
RULE_HASH_STAT_INCREMENT_LIST_COUNT(value, mElementClassCalls);
}
}
}
NS_ASSERTION(valueCount <= testCount, "values exceeded list size");
if (valueCount > 0) {
// Merge the lists while there are still multiple lists to merge.
while (valueCount > 1) {
PRInt32 valueIndex = 0;
PRInt32 highestRuleIndex = mEnumList[valueIndex]->mIndex;
for (PRInt32 index = 1; index < valueCount; ++index) {
PRInt32 ruleIndex = mEnumList[index]->mIndex;
if (ruleIndex > highestRuleIndex) {
valueIndex = index;
highestRuleIndex = ruleIndex;
}
}
(*aFunc)(mEnumList[valueIndex]->mRule, aData);
RuleValue *next = mEnumList[valueIndex]->mNext;
mEnumList[valueIndex] = next ? next : mEnumList[--valueCount];
}
// Fast loop over single value.
RuleValue* value = mEnumList[0];
do {
(*aFunc)(value->mRule, aData);
value = value->mNext;
} while (value);
}
}
void RuleHash::EnumerateTagRules(nsIAtom* aTag, RuleEnumFunc aFunc, void* aData)
{
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(&mTagTable, aTag, PL_DHASH_LOOKUP));
RULE_HASH_STAT_INCREMENT(mPseudosMatched);
if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
RuleValue *tagValue = entry->mRules;
do {
RULE_HASH_STAT_INCREMENT(mPseudoTagCalls);
(*aFunc)(tagValue->mRule, aData);
tagValue = tagValue->mNext;
} while (tagValue);
}
}
//--------------------------------
struct RuleCascadeData {
RuleCascadeData(nsIAtom *aMedium, PRBool aQuirksMode)
: mWeightedRules(nsnull),
mRuleHash(aQuirksMode),
mStateSelectors(),
mMedium(aMedium),
mNext(nsnull)
{
NS_NewISupportsArray(&mWeightedRules);
}
~RuleCascadeData(void)
{
NS_IF_RELEASE(mWeightedRules);
}
nsISupportsArray* mWeightedRules;
RuleHash mRuleHash;
nsVoidArray mStateSelectors;
nsCOMPtr<nsIAtom> mMedium;
RuleCascadeData* mNext; // for a different medium
};
// -------------------------------
// CSS Style Rule processor
//
class CSSRuleProcessor: public nsICSSStyleRuleProcessor {
public:
CSSRuleProcessor(void);
virtual ~CSSRuleProcessor(void);
NS_DECL_ISUPPORTS
public:
// nsICSSStyleRuleProcessor
NS_IMETHOD AppendStyleSheet(nsICSSStyleSheet* aStyleSheet);
NS_IMETHOD ClearRuleCascades(void);
// nsIStyleRuleProcessor
NS_IMETHOD RulesMatching(ElementRuleProcessorData* aData,
nsIAtom* aMedium);
NS_IMETHOD RulesMatching(PseudoRuleProcessorData* aData,
nsIAtom* aMedium);
NS_IMETHOD HasStateDependentStyle(StateRuleProcessorData* aData,
nsIAtom* aMedium,
PRBool* aResult);
#ifdef DEBUG
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize);
#endif
protected:
RuleCascadeData* GetRuleCascade(nsIPresContext* aPresContext, nsIAtom* aMedium);
static PRBool CascadeSheetRulesInto(nsISupports* aSheet, void* aData);
nsISupportsArray* mSheets;
RuleCascadeData* mRuleCascades;
};
// -------------------------------
// CSS Style Sheet Inner Data Container
//
class CSSStyleSheetInner {
public:
CSSStyleSheetInner(nsICSSStyleSheet* aParentSheet);
CSSStyleSheetInner(CSSStyleSheetInner& aCopy, nsICSSStyleSheet* aParentSheet);
virtual ~CSSStyleSheetInner(void);
virtual CSSStyleSheetInner* CloneFor(nsICSSStyleSheet* aParentSheet);
virtual void AddSheet(nsICSSStyleSheet* aParentSheet);
virtual void RemoveSheet(nsICSSStyleSheet* aParentSheet);
virtual void RebuildNameSpaces(void);
#ifdef DEBUG
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize);
#endif
nsAutoVoidArray mSheets;
nsIURI* mURL;
nsISupportsArray* mOrderedRules;
nsCOMPtr<nsINameSpace> mNameSpace;
PRInt32 mDefaultNameSpaceID;
nsHashtable mRelevantAttributes;
};
// -------------------------------
// CSS Style Sheet
//
class CSSImportsCollectionImpl;
class CSSRuleListImpl;
class DOMMediaListImpl;
class CSSStyleSheetImpl : public nsICSSStyleSheet,
public nsIDOMCSSStyleSheet,
public nsICSSLoaderObserver
{
public:
CSSStyleSheetImpl();
NS_DECL_ISUPPORTS
// basic style sheet data
NS_IMETHOD Init(nsIURI* aURL);
NS_IMETHOD GetURL(nsIURI*& aURL) const;
NS_IMETHOD GetTitle(nsString& aTitle) const;
NS_IMETHOD SetTitle(const nsString& aTitle);
NS_IMETHOD GetType(nsString& aType) const;
NS_IMETHOD GetMediumCount(PRInt32& aCount) const;
NS_IMETHOD GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const;
NS_IMETHOD_(PRBool) UseForMedium(nsIAtom* aMedium) const;
NS_IMETHOD AppendMedium(nsIAtom* aMedium);
NS_IMETHOD ClearMedia(void);
NS_IMETHOD DeleteRuleFromGroup(nsICSSGroupRule* aGroup, PRUint32 aIndex);
NS_IMETHOD InsertRuleIntoGroup(const nsAString& aRule, nsICSSGroupRule* aGroup, PRUint32 aIndex, PRUint32* _retval);
NS_IMETHOD GetEnabled(PRBool& aEnabled) const;
NS_IMETHOD SetEnabled(PRBool aEnabled);
// style sheet owner info
NS_IMETHOD GetParentSheet(nsIStyleSheet*& aParent) const; // may be null
NS_IMETHOD GetOwningDocument(nsIDocument*& aDocument) const;
NS_IMETHOD SetOwningDocument(nsIDocument* aDocument);
NS_IMETHOD SetOwningNode(nsIDOMNode* aOwningNode);
NS_IMETHOD SetOwnerRule(nsICSSImportRule* aOwnerRule);
NS_IMETHOD GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* aPrevProcessor);
NS_IMETHOD DropRuleProcessorReference(nsICSSStyleRuleProcessor* aProcessor);
NS_IMETHOD ContainsStyleSheet(nsIURI* aURL, PRBool& aContains, nsIStyleSheet** aTheChild=nsnull);
NS_IMETHOD AppendStyleSheet(nsICSSStyleSheet* aSheet);
NS_IMETHOD InsertStyleSheetAt(nsICSSStyleSheet* aSheet, PRInt32 aIndex);
// If changing the given attribute cannot affect style context, aAffects
// will be PR_FALSE on return.
NS_IMETHOD AttributeAffectsStyle(nsIAtom *aAttribute, nsIContent *aContent,
PRBool &aAffects);
// Find attributes in selector for rule, for use with AttributeAffectsStyle
NS_IMETHOD CheckRuleForAttributes(nsICSSRule* aRule);
// 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 IsModified(PRBool* aSheetModified) const;
NS_IMETHOD SetModified(PRBool aModified);
NS_IMETHOD StyleSheetLoaded(nsICSSStyleSheet*aSheet, PRBool aNotify);
nsresult EnsureUniqueInner(void);
#ifdef DEBUG
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize);
#endif
// nsIDOMStyleSheet interface
NS_DECL_NSIDOMSTYLESHEET
// nsIDOMCSSStyleSheet interface
NS_DECL_NSIDOMCSSSTYLESHEET
private:
// These are not supported and are not implemented!
CSSStyleSheetImpl(const CSSStyleSheetImpl& aCopy);
CSSStyleSheetImpl& operator=(const CSSStyleSheetImpl& aCopy);
protected:
virtual ~CSSStyleSheetImpl();
void ClearRuleCascades(void);
nsresult WillDirty(void);
void DidDirty(void);
protected:
nsString mTitle;
DOMMediaListImpl* mMedia;
CSSStyleSheetImpl* mFirstChild;
CSSStyleSheetImpl* mNext;
nsICSSStyleSheet* mParent; // weak ref
nsICSSImportRule* mOwnerRule; // weak ref
CSSImportsCollectionImpl* mImportsCollection;
CSSRuleListImpl* mRuleCollection;
nsIDocument* mDocument;
nsIDOMNode* mOwningNode; // weak ref
PRBool mDisabled;
PRBool mDirty; // has been modified
CSSStyleSheetInner* mInner;
nsAutoVoidArray* mRuleProcessors;
friend class CSSRuleProcessor;
friend class DOMMediaListImpl;
};
// -------------------------------
// Style Rule List for the DOM
//
class CSSRuleListImpl : public nsIDOMCSSRuleList
{
public:
CSSRuleListImpl(CSSStyleSheetImpl *aStyleSheet);
NS_DECL_ISUPPORTS
// nsIDOMCSSRuleList interface
NS_IMETHOD GetLength(PRUint32* aLength);
NS_IMETHOD Item(PRUint32 aIndex, nsIDOMCSSRule** aReturn);
void DropReference() { mStyleSheet = nsnull; }
protected:
virtual ~CSSRuleListImpl();
CSSStyleSheetImpl* mStyleSheet;
public:
PRBool mRulesAccessed;
};
CSSRuleListImpl::CSSRuleListImpl(CSSStyleSheetImpl *aStyleSheet)
{
NS_INIT_ISUPPORTS();
// Not reference counted to avoid circular references.
// The style sheet will tell us when its going away.
mStyleSheet = aStyleSheet;
mRulesAccessed = PR_FALSE;
}
CSSRuleListImpl::~CSSRuleListImpl()
{
}
// QueryInterface implementation for CSSRuleList
NS_INTERFACE_MAP_BEGIN(CSSRuleListImpl)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRuleList)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CSSRuleList)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(CSSRuleListImpl);
NS_IMPL_RELEASE(CSSRuleListImpl);
NS_IMETHODIMP
CSSRuleListImpl::GetLength(PRUint32* aLength)
{
if (nsnull != mStyleSheet) {
PRInt32 count;
mStyleSheet->StyleRuleCount(count);
*aLength = (PRUint32)count;
}
else {
*aLength = 0;
}
return NS_OK;
}
NS_IMETHODIMP
CSSRuleListImpl::Item(PRUint32 aIndex, nsIDOMCSSRule** aReturn)
{
nsresult result = NS_OK;
*aReturn = nsnull;
if (mStyleSheet) {
result = mStyleSheet->EnsureUniqueInner(); // needed to ensure rules have correct parent
if (NS_SUCCEEDED(result)) {
nsCOMPtr<nsICSSRule> rule;
result = mStyleSheet->GetStyleRuleAt(aIndex, *getter_AddRefs(rule));
if (rule) {
result = CallQueryInterface(rule, aReturn);
mRulesAccessed = PR_TRUE; // signal to never share rules again
} else if (result == NS_ERROR_ILLEGAL_VALUE) {
result = NS_OK; // per spec: "Return Value ... null if ... not a valid index."
}
}
}
return result;
}
class DOMMediaListImpl : public nsIDOMMediaList,
public nsIMediaList
{
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMMEDIALIST
NS_FORWARD_NSISUPPORTSARRAY(mArray->)
NS_FORWARD_NSICOLLECTION(mArray->);
NS_FORWARD_NSISERIALIZABLE(mArray->); // XXXbe temporary
NS_IMETHOD_(PRBool) operator==(const nsISupportsArray& other) {
return PR_FALSE;
}
NS_IMETHOD_(nsISupports*) operator[](PRUint32 aIndex) {
return mArray->ElementAt(aIndex);
}
// nsIMediaList methods
NS_DECL_NSIMEDIALIST
DOMMediaListImpl(nsISupportsArray *aArray, CSSStyleSheetImpl *aStyleSheet);
virtual ~DOMMediaListImpl();
private:
nsresult BeginMediaChange(void);
nsresult EndMediaChange(void);
nsresult Delete(const nsAString & aOldMedium);
nsresult Append(const nsAString & aOldMedium);
nsCOMPtr<nsISupportsArray> mArray;
// not refcounted; sheet will let us know when it goes away
// mStyleSheet is the sheet that needs to be dirtied when this medialist
// changes
CSSStyleSheetImpl* mStyleSheet;
};
// QueryInterface implementation for DOMMediaListImpl
NS_INTERFACE_MAP_BEGIN(DOMMediaListImpl)
NS_INTERFACE_MAP_ENTRY(nsIDOMMediaList)
NS_INTERFACE_MAP_ENTRY(nsIMediaList)
NS_INTERFACE_MAP_ENTRY(nsISupportsArray)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMMediaList)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(MediaList)
NS_INTERFACE_MAP_ENTRY(nsISerializable)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(DOMMediaListImpl);
NS_IMPL_RELEASE(DOMMediaListImpl);
DOMMediaListImpl::DOMMediaListImpl(nsISupportsArray *aArray,
CSSStyleSheetImpl *aStyleSheet)
: mArray(aArray), mStyleSheet(aStyleSheet)
{
NS_INIT_ISUPPORTS();
NS_ABORT_IF_FALSE(mArray, "This can't be used without an array!!");
}
DOMMediaListImpl::~DOMMediaListImpl()
{
}
nsresult
NS_NewMediaList(nsIMediaList** aInstancePtrResult) {
return NS_NewMediaList(NS_LITERAL_STRING(""), aInstancePtrResult);
}
nsresult
NS_NewMediaList(const nsAString& aMediaText, nsIMediaList** aInstancePtrResult) {
nsresult rv;
NS_ASSERTION(aInstancePtrResult, "Null out param.");
nsCOMPtr<nsISupportsArray> array;
rv = NS_NewISupportsArray(getter_AddRefs(array));
if (NS_FAILED(rv)) {
return NS_ERROR_OUT_OF_MEMORY;
}
DOMMediaListImpl* medialist = new DOMMediaListImpl(array, nsnull);
*aInstancePtrResult = medialist;
NS_ENSURE_TRUE(medialist, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aInstancePtrResult);
rv = medialist->SetMediaText(aMediaText);
if (NS_FAILED(rv)) {
NS_RELEASE(*aInstancePtrResult);
*aInstancePtrResult = nsnull;
}
return rv;
}
nsresult NS_NewMediaList(nsISupportsArray* aArray, nsICSSStyleSheet* aSheet, nsIMediaList** aInstancePtrResult)
{
NS_ASSERTION(aInstancePtrResult, "Null out param.");
DOMMediaListImpl* medialist = new DOMMediaListImpl(aArray, NS_STATIC_CAST(CSSStyleSheetImpl*, aSheet));
*aInstancePtrResult = medialist;
NS_ENSURE_TRUE(medialist, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aInstancePtrResult);
return NS_OK;
}
NS_IMETHODIMP
DOMMediaListImpl::GetText(nsAString& aMediaText)
{
aMediaText.Truncate();
PRUint32 cnt;
nsresult rv = Count(&cnt);
if (NS_FAILED(rv)) return rv;
PRInt32 count = cnt, index = 0;
while (index < count) {
nsCOMPtr<nsIAtom> medium;
QueryElementAt(index++, NS_GET_IID(nsIAtom), getter_AddRefs(medium));
NS_ENSURE_TRUE(medium, NS_ERROR_FAILURE);
const PRUnichar *buffer;
medium->GetUnicode(&buffer);
aMediaText.Append(buffer);
if (index < count) {
aMediaText.Append(NS_LITERAL_STRING(", "));
}
}
return NS_OK;
}
NS_IMETHODIMP
DOMMediaListImpl::SetText(const nsAString& aMediaText)
{
nsresult rv = Clear();
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString buf(aMediaText);
PRInt32 n = buf.FindChar(',');
do {
if (n < 0)
n = buf.Length();
nsAutoString tmp;
buf.Left(tmp, n);
tmp.CompressWhitespace();
if (!tmp.IsEmpty()) {
rv = Append(tmp);
NS_ENSURE_SUCCESS(rv, rv);
}
buf.Cut(0, n + 1);
n = buf.FindChar(',');
} while (!buf.IsEmpty());
return rv;
}
/*
* aMatch is true when we contain the desired medium or contain the
* "all" medium or contain no media at all, which is the same as
* containing "all"
*/
NS_IMETHODIMP
DOMMediaListImpl::MatchesMedium(nsIAtom* aMedium, PRBool* aMatch)
{
NS_ENSURE_ARG_POINTER(aMatch);
*aMatch = PR_FALSE;
*aMatch = (-1 != IndexOf(aMedium)) ||
(-1 != IndexOf(nsLayoutAtoms::all));
if (*aMatch)
return NS_OK;
PRUint32 count;
nsresult rv = Count(&count);
if(NS_FAILED(rv))
return rv;
*aMatch = (count == 0);
return NS_OK;
}
NS_IMETHODIMP
DOMMediaListImpl::DropReference(void)
{
mStyleSheet = nsnull;
return NS_OK;
}
NS_IMETHODIMP
DOMMediaListImpl::GetMediaText(nsAString& aMediaText)
{
return GetText(aMediaText);
}
NS_IMETHODIMP
DOMMediaListImpl::SetMediaText(const nsAString& aMediaText)
{
nsresult rv;
rv = BeginMediaChange();
if (NS_FAILED(rv))
return rv;
rv = SetText(aMediaText);
if (NS_FAILED(rv))
return rv;
rv = EndMediaChange();
return rv;
}
NS_IMETHODIMP
DOMMediaListImpl::GetLength(PRUint32* aLength)
{
NS_ENSURE_ARG_POINTER(aLength);
PRUint32 cnt;
nsresult rv = Count(&cnt);
if (NS_FAILED(rv)) return rv;
*aLength = cnt;
return NS_OK;
}
NS_IMETHODIMP
DOMMediaListImpl::Item(PRUint32 aIndex, nsAString& aReturn)
{
nsCOMPtr<nsISupports> tmp(dont_AddRef(ElementAt(aIndex)));
if (tmp) {
nsCOMPtr<nsIAtom> medium(do_QueryInterface(tmp));
NS_ENSURE_TRUE(medium, NS_ERROR_FAILURE);
const PRUnichar *buffer;
medium->GetUnicode(&buffer);
aReturn.Assign(buffer);
} else {
aReturn.Truncate();
}
return NS_OK;
}
NS_IMETHODIMP
DOMMediaListImpl::DeleteMedium(const nsAString& aOldMedium)
{
nsresult rv;
rv = BeginMediaChange();
if (NS_FAILED(rv))
return rv;
rv = Delete(aOldMedium);
if (NS_FAILED(rv))
return rv;
rv = EndMediaChange();
return rv;
}
NS_IMETHODIMP
DOMMediaListImpl::AppendMedium(const nsAString& aNewMedium)
{
nsresult rv;
rv = BeginMediaChange();
if (NS_FAILED(rv))
return rv;
rv = Append(aNewMedium);
if (NS_FAILED(rv))
return rv;
rv = EndMediaChange();
return rv;
}
nsresult
DOMMediaListImpl::Delete(const nsAString& aOldMedium)
{
if (aOldMedium.IsEmpty())
return NS_ERROR_DOM_NOT_FOUND_ERR;
nsCOMPtr<nsIAtom> old(dont_AddRef(NS_NewAtom(aOldMedium)));
NS_ENSURE_TRUE(old, NS_ERROR_OUT_OF_MEMORY);
PRInt32 indx = IndexOf(old);
if (indx < 0) {
return NS_ERROR_DOM_NOT_FOUND_ERR;
}
RemoveElementAt(indx);
return NS_OK;
}
nsresult
DOMMediaListImpl::Append(const nsAString& aNewMedium)
{
if (aNewMedium.IsEmpty())
return NS_ERROR_DOM_NOT_FOUND_ERR;
nsCOMPtr<nsIAtom> media(dont_AddRef(NS_NewAtom(aNewMedium)));
NS_ENSURE_TRUE(media, NS_ERROR_OUT_OF_MEMORY);
PRInt32 indx = IndexOf(media);
if (indx >= 0) {
RemoveElementAt(indx);
}
AppendElement(media);
return NS_OK;
}
nsresult
DOMMediaListImpl::BeginMediaChange(void)
{
nsresult rv;
nsCOMPtr<nsIDocument> doc;
if (mStyleSheet) {
rv = mStyleSheet->GetOwningDocument(*getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, rv);
rv = doc->BeginUpdate();
NS_ENSURE_SUCCESS(rv, rv);
rv = mStyleSheet->WillDirty();
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
nsresult
DOMMediaListImpl::EndMediaChange(void)
{
nsresult rv;
nsCOMPtr<nsIDocument> doc;
if (mStyleSheet) {
mStyleSheet->DidDirty();
rv = mStyleSheet->GetOwningDocument(*getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, rv);
rv = doc->StyleRuleChanged(mStyleSheet, nsnull, NS_STYLE_HINT_RECONSTRUCT_ALL);
NS_ENSURE_SUCCESS(rv, rv);
rv = doc->EndUpdate();
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
// -------------------------------
// Imports Collection for the DOM
//
class CSSImportsCollectionImpl : public nsIDOMStyleSheetList
{
public:
CSSImportsCollectionImpl(nsICSSStyleSheet *aStyleSheet);
NS_DECL_ISUPPORTS
// nsIDOMCSSStyleSheetList interface
NS_IMETHOD GetLength(PRUint32* aLength);
NS_IMETHOD Item(PRUint32 aIndex, nsIDOMStyleSheet** aReturn);
void DropReference() { mStyleSheet = nsnull; }
protected:
virtual ~CSSImportsCollectionImpl();
nsICSSStyleSheet* mStyleSheet;
};
CSSImportsCollectionImpl::CSSImportsCollectionImpl(nsICSSStyleSheet *aStyleSheet)
{
NS_INIT_ISUPPORTS();
// Not reference counted to avoid circular references.
// The style sheet will tell us when its going away.
mStyleSheet = aStyleSheet;
}
CSSImportsCollectionImpl::~CSSImportsCollectionImpl()
{
}
// QueryInterface implementation for CSSImportsCollectionImpl
NS_INTERFACE_MAP_BEGIN(CSSImportsCollectionImpl)
NS_INTERFACE_MAP_ENTRY(nsIDOMStyleSheetList)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(StyleSheetList)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(CSSImportsCollectionImpl);
NS_IMPL_RELEASE(CSSImportsCollectionImpl);
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(NS_GET_IID(nsIDOMStyleSheet), (void **)aReturn);
}
NS_RELEASE(sheet);
}
return result;
}
// -------------------------------
// CSS Style Sheet Inner Data Container
//
static PRBool SetStyleSheetReference(nsISupports* aElement, void* aSheet)
{
nsICSSRule* rule = (nsICSSRule*)aElement;
if (nsnull != rule) {
rule->SetStyleSheet((nsICSSStyleSheet*)aSheet);
}
return PR_TRUE;
}
CSSStyleSheetInner::CSSStyleSheetInner(nsICSSStyleSheet* aParentSheet)
: mSheets(),
mURL(nsnull),
mOrderedRules(nsnull),
mNameSpace(nsnull),
mDefaultNameSpaceID(kNameSpaceID_None),
mRelevantAttributes()
{
MOZ_COUNT_CTOR(CSSStyleSheetInner);
mSheets.AppendElement(aParentSheet);
}
static PRBool
CloneRuleInto(nsISupports* aRule, void* aArray)
{
nsICSSRule* rule = (nsICSSRule*)aRule;
nsICSSRule* clone = nsnull;
rule->Clone(clone);
if (clone) {
nsISupportsArray* array = (nsISupportsArray*)aArray;
array->AppendElement(clone);
NS_RELEASE(clone);
}
return PR_TRUE;
}
static PRBool PR_CALLBACK
CopyRelevantAttributes(nsHashKey *aAttrKey, void *aAtom, void *aTable)
{
nsHashtable *table = NS_STATIC_CAST(nsHashtable *, aTable);
AtomKey *key = NS_STATIC_CAST(AtomKey *, aAttrKey);
table->Put(key, key->mAtom);
// we don't need to addref the atom here, because we're also copying the
// rules when we clone, and that will add a ref for us
return PR_TRUE;
}
CSSStyleSheetInner::CSSStyleSheetInner(CSSStyleSheetInner& aCopy,
nsICSSStyleSheet* aParentSheet)
: mSheets(),
mURL(aCopy.mURL),
mNameSpace(nsnull),
mDefaultNameSpaceID(aCopy.mDefaultNameSpaceID),
mRelevantAttributes()
{
MOZ_COUNT_CTOR(CSSStyleSheetInner);
mSheets.AppendElement(aParentSheet);
NS_IF_ADDREF(mURL);
if (aCopy.mOrderedRules) {
NS_NewISupportsArray(&mOrderedRules);
if (mOrderedRules) {
aCopy.mOrderedRules->EnumerateForwards(CloneRuleInto, mOrderedRules);
mOrderedRules->EnumerateForwards(SetStyleSheetReference, aParentSheet);
}
}
else {
mOrderedRules = nsnull;
}
aCopy.mRelevantAttributes.Enumerate(CopyRelevantAttributes,
&mRelevantAttributes);
RebuildNameSpaces();
}
CSSStyleSheetInner::~CSSStyleSheetInner(void)
{
MOZ_COUNT_DTOR(CSSStyleSheetInner);
NS_IF_RELEASE(mURL);
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(SetStyleSheetReference, nsnull);
NS_RELEASE(mOrderedRules);
}
}
CSSStyleSheetInner*
CSSStyleSheetInner::CloneFor(nsICSSStyleSheet* aParentSheet)
{
return new CSSStyleSheetInner(*this, aParentSheet);
}
void
CSSStyleSheetInner::AddSheet(nsICSSStyleSheet* aParentSheet)
{
mSheets.AppendElement(aParentSheet);
}
void
CSSStyleSheetInner::RemoveSheet(nsICSSStyleSheet* aParentSheet)
{
if (1 == mSheets.Count()) {
NS_ASSERTION(aParentSheet == (nsICSSStyleSheet*)mSheets.ElementAt(0), "bad parent");
delete this;
return;
}
if (aParentSheet == (nsICSSStyleSheet*)mSheets.ElementAt(0)) {
mSheets.RemoveElementAt(0);
NS_ASSERTION(mSheets.Count(), "no parents");
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(SetStyleSheetReference,
(nsICSSStyleSheet*)mSheets.ElementAt(0));
}
}
else {
mSheets.RemoveElement(aParentSheet);
}
}
static PRBool
CreateNameSpace(nsISupports* aRule, void* aNameSpacePtr)
{
nsICSSRule* rule = (nsICSSRule*)aRule;
PRInt32 type = nsICSSRule::UNKNOWN_RULE;
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)
{
nsContentUtils::GetNSManagerWeakRef()->CreateRootNameSpace(*getter_AddRefs(mNameSpace));
if (kNameSpaceID_Unknown != mDefaultNameSpaceID) {
nsCOMPtr<nsINameSpace> defaultNameSpace;
mNameSpace->CreateChildNameSpace(nsnull, mDefaultNameSpaceID,
*getter_AddRefs(defaultNameSpace));
if (defaultNameSpace) {
mNameSpace = defaultNameSpace;
}
}
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(CreateNameSpace, address_of(mNameSpace));
}
}
#ifdef DEBUG
/******************************************************************************
* SizeOf method:
*
* Self (reported as CSSStyleSheetInner's size):
* 1) sizeof(*this) + sizeof mSheets array (not contents though)
* + size of the mOrderedRules array (not the contents though)
*
* Contained / Aggregated data (not reported as CSSStyleSheetInner's size):
* 1) mSheets: each style sheet is sized seperately
* 2) mOrderedRules: each fule is sized seperately
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void CSSStyleSheetInner::SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize)
{
NS_ASSERTION(aSizeOfHandler != nsnull, "SizeOf handler cannot be null");
// first get the unique items collection
UNIQUE_STYLE_ITEMS(uniqueItems);
if(! uniqueItems->AddItem((void*)this)){
// this style sheet is lared accounted for
return;
}
PRUint32 localSize=0;
PRBool rulesCounted=PR_FALSE;
// create a tag for this instance
nsCOMPtr<nsIAtom> tag;
tag = getter_AddRefs(NS_NewAtom("CSSStyleSheetInner"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(CSSStyleSheetInner);
// add in the size of the mSheets array itself
mSheets.SizeOf(aSizeOfHandler,&localSize);
aSize += localSize;
// and the mOrderedRules array (if there is one)
if(mOrderedRules && uniqueItems->AddItem(mOrderedRules)){
rulesCounted=PR_TRUE;
// no SizeOf method so we just get the basic object size
aSize += sizeof(*mOrderedRules);
}
aSizeOfHandler->AddSize(tag,aSize);
// delegate to the contained containers
// mSheets : nsVoidArray
{
PRUint32 sheetCount, sheetCur;
sheetCount = mSheets.Count();
for(sheetCur=0; sheetCur < sheetCount; sheetCur++){
nsICSSStyleSheet* sheet = (nsICSSStyleSheet*)mSheets.ElementAt(sheetCur);
if(sheet){
sheet->SizeOf(aSizeOfHandler, localSize);
}
}
}
// mOrderedRules : nsISupportsArray*
if(mOrderedRules && rulesCounted){
PRUint32 ruleCount, ruleCur;
mOrderedRules->Count(&ruleCount);
for(ruleCur=0; ruleCur < ruleCount; ruleCur++){
nsICSSRule* rule = (nsICSSRule*)mOrderedRules->ElementAt(ruleCur);
if(rule){
rule->SizeOf(aSizeOfHandler, localSize);
NS_IF_RELEASE(rule);
}
}
}
}
#endif
// -------------------------------
// CSS Style Sheet
//
MOZ_DECL_CTOR_COUNTER(CSSStyleSheetImpl)
CSSStyleSheetImpl::CSSStyleSheetImpl()
: nsICSSStyleSheet(),
mRefCnt(0),
mTitle(),
mMedia(nsnull),
mFirstChild(nsnull),
mNext(nsnull),
mParent(nsnull),
mOwnerRule(nsnull),
mImportsCollection(nsnull),
mRuleCollection(nsnull),
mDocument(nsnull),
mOwningNode(nsnull),
mDisabled(PR_FALSE),
mDirty(PR_FALSE),
mRuleProcessors(nsnull)
{
NS_INIT_ISUPPORTS();
mInner = new CSSStyleSheetInner(this);
}
CSSStyleSheetImpl::CSSStyleSheetImpl(const CSSStyleSheetImpl& aCopy)
: nsICSSStyleSheet(),
mRefCnt(0),
mTitle(aCopy.mTitle),
mMedia(nsnull),
mFirstChild(nsnull),
mNext(nsnull),
mParent(aCopy.mParent),
mOwnerRule(aCopy.mOwnerRule),
mImportsCollection(nsnull), // re-created lazily
mRuleCollection(nsnull), // re-created lazily
mDocument(aCopy.mDocument),
mOwningNode(aCopy.mOwningNode),
mDisabled(aCopy.mDisabled),
mDirty(PR_FALSE),
mInner(aCopy.mInner),
mRuleProcessors(nsnull)
{
NS_INIT_ISUPPORTS();
mInner->AddSheet(this);
if (aCopy.mRuleCollection &&
aCopy.mRuleCollection->mRulesAccessed) { // CSSOM's been there, force full copy now
EnsureUniqueInner();
}
if (aCopy.mMedia) {
nsCOMPtr<nsISupportsArray> tmp;
(NS_STATIC_CAST(nsISupportsArray *, aCopy.mMedia))->Clone(getter_AddRefs(tmp));
mMedia = new DOMMediaListImpl(tmp, this);
NS_IF_ADDREF(mMedia);
}
if (aCopy.mFirstChild) {
CSSStyleSheetImpl* otherChild = aCopy.mFirstChild;
CSSStyleSheetImpl** ourSlot = &mFirstChild;
do {
CSSStyleSheetImpl* child = new CSSStyleSheetImpl(*otherChild);
if (child) {
NS_ADDREF(child);
(*ourSlot) = child;
ourSlot = &(child->mNext);
}
otherChild = otherChild->mNext;
}
while (otherChild && ourSlot);
}
}
CSSStyleSheetImpl::~CSSStyleSheetImpl()
{
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);
}
if (mMedia) {
mMedia->DropReference();
NS_RELEASE(mMedia);
}
mInner->RemoveSheet(this);
// XXX The document reference is not reference counted and should
// not be released. The document will let us know when it is going
// away.
if (mRuleProcessors) {
NS_ASSERTION(mRuleProcessors->Count() == 0, "destucting sheet with rule processor reference");
delete mRuleProcessors; // weak refs, should be empty here anyway
}
}
// QueryInterface implementation for CSSStyleSheetImpl
NS_INTERFACE_MAP_BEGIN(CSSStyleSheetImpl)
NS_INTERFACE_MAP_ENTRY(nsICSSStyleSheet)
NS_INTERFACE_MAP_ENTRY(nsIStyleSheet)
NS_INTERFACE_MAP_ENTRY(nsIDOMStyleSheet)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSStyleSheet)
NS_INTERFACE_MAP_ENTRY(nsICSSLoaderObserver)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsICSSStyleSheet)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CSSStyleSheet)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(CSSStyleSheetImpl)
NS_IMPL_RELEASE(CSSStyleSheetImpl)
NS_IMETHODIMP
CSSStyleSheetImpl::GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* aPrevProcessor)
{
nsresult result = NS_OK;
nsICSSStyleRuleProcessor* cssProcessor = nsnull;
if (aPrevProcessor) {
result = aPrevProcessor->QueryInterface(NS_GET_IID(nsICSSStyleRuleProcessor), (void**)&cssProcessor);
}
if (! cssProcessor) {
CSSRuleProcessor* processor = new CSSRuleProcessor();
if (processor) {
result = processor->QueryInterface(NS_GET_IID(nsICSSStyleRuleProcessor), (void**)&cssProcessor);
if (NS_FAILED(result)) {
delete processor;
cssProcessor = nsnull;
}
}
else {
result = NS_ERROR_OUT_OF_MEMORY;
}
}
if (NS_SUCCEEDED(result) && cssProcessor) {
cssProcessor->AppendStyleSheet(this);
if (! mRuleProcessors) {
mRuleProcessors = new nsAutoVoidArray();
}
if (mRuleProcessors) {
NS_ASSERTION(-1 == mRuleProcessors->IndexOf(cssProcessor), "processor already registered");
mRuleProcessors->AppendElement(cssProcessor); // weak ref
}
}
aProcessor = cssProcessor;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::DropRuleProcessorReference(nsICSSStyleRuleProcessor* aProcessor)
{
NS_ASSERTION(mRuleProcessors, "no rule processors registered");
if (mRuleProcessors) {
NS_ASSERTION(-1 != mRuleProcessors->IndexOf(aProcessor), "not a registered processor");
mRuleProcessors->RemoveElement(aProcessor);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::Init(nsIURI* aURL)
{
NS_PRECONDITION(aURL, "null ptr");
if (! aURL)
return NS_ERROR_NULL_POINTER;
if (! mInner) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ASSERTION(! mInner->mURL, "already initialized");
if (mInner->mURL)
return NS_ERROR_ALREADY_INITIALIZED;
if (mInner->mURL) {
#ifdef DEBUG
PRBool eq;
nsresult rv = mInner->mURL->Equals(aURL, &eq);
NS_ASSERTION(NS_SUCCEEDED(rv) && eq, "bad inner");
#endif
}
else {
mInner->mURL = aURL;
NS_ADDREF(mInner->mURL);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetURL(nsIURI*& aURL) const
{
const nsIURI* url = ((mInner) ? mInner->mURL : nsnull);
aURL = (nsIURI*)url;
NS_IF_ADDREF(aURL);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetTitle(const nsString& aTitle)
{
mTitle = aTitle;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetType(nsString& aType) const
{
aType.Assign(NS_LITERAL_STRING("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_(PRBool)
CSSStyleSheetImpl::UseForMedium(nsIAtom* aMedium) const
{
if (mMedia) {
PRBool matches = PR_FALSE;
mMedia->MatchesMedium(aMedium, &matches);
return matches;
}
return PR_TRUE;
}
NS_IMETHODIMP
CSSStyleSheetImpl::AppendMedium(nsIAtom* aMedium)
{
nsresult result = NS_OK;
if (!mMedia) {
nsCOMPtr<nsISupportsArray> tmp;
result = NS_NewISupportsArray(getter_AddRefs(tmp));
NS_ENSURE_SUCCESS(result, result);
mMedia = new DOMMediaListImpl(tmp, this);
NS_ENSURE_TRUE(mMedia, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(mMedia);
}
if (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 = !mDisabled;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetEnabled(PRBool aEnabled)
{
PRBool oldState = mDisabled;
mDisabled = !aEnabled;
if ((nsnull != mDocument) && (mDisabled != oldState)) {
mDocument->SetStyleSheetDisabledState(this, mDisabled);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetParentSheet(nsIStyleSheet*& aParent) const
{
aParent = mParent;
NS_IF_ADDREF(aParent);
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::SetOwnerRule(nsICSSImportRule* aOwnerRule)
{ // not ref counted
mOwnerRule = aOwnerRule;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::ContainsStyleSheet(nsIURI* aURL, PRBool& aContains, nsIStyleSheet** aTheChild /*=nsnull*/)
{
NS_PRECONDITION(nsnull != aURL, "null arg");
// first check ourself out
nsresult rv = mInner->mURL->Equals(aURL, &aContains);
if (NS_FAILED(rv)) aContains = PR_FALSE;
if (aContains) {
// if we found it and the out-param is there, set it and addref
if (aTheChild) {
rv = QueryInterface( NS_GET_IID(nsIStyleSheet), (void **)aTheChild);
}
} else {
CSSStyleSheetImpl* child = mFirstChild;
// now check the chil'ins out (recursively)
while ((PR_FALSE == aContains) && (nsnull != child)) {
child->ContainsStyleSheet(aURL, aContains, aTheChild);
if (aContains) {
break;
} else {
child = child->mNext;
}
}
}
// NOTE: if there are errors in the above we are handling them locally
// and not promoting them to the caller
return NS_OK;
}
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::AttributeAffectsStyle(nsIAtom *aAttribute,
nsIContent *aContent,
PRBool &aAffects)
{
DependentAtomKey key(aAttribute);
aAffects = !!mInner->mRelevantAttributes.Get(&key);
for (CSSStyleSheetImpl *child = mFirstChild;
child && !aAffects;
child = child->mNext) {
child->AttributeAffectsStyle(aAttribute, aContent, aAffects);
}
return NS_OK;
}
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 = nsICSSRule::UNKNOWN_RULE;
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();
} else {
CheckRuleForAttributes(aRule);
}
}
}
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 = nsICSSRule::UNKNOWN_RULE;
aRule->GetType(type);
if (nsICSSRule::NAMESPACE_RULE == type) {
if (! mInner->mNameSpace) {
nsContentUtils::GetNSManagerWeakRef()->CreateRootNameSpace(*getter_AddRefs(mInner->mNameSpace));
}
if (mInner->mNameSpace) {
nsCOMPtr<nsICSSNameSpaceRule> nameSpaceRule(do_QueryInterface(aRule));
nsCOMPtr<nsINameSpace> newNameSpace;
nsCOMPtr<nsIAtom> prefix;
nsAutoString urlSpec;
nameSpaceRule->GetPrefix(*getter_AddRefs(prefix));
nameSpaceRule->GetURLSpec(urlSpec);
mInner->mNameSpace->CreateChildNameSpace(prefix, urlSpec,
*getter_AddRefs(newNameSpace));
if (newNameSpace) {
mInner->mNameSpace = newNameSpace;
}
}
} else {
CheckRuleForAttributes(aRule);
}
}
}
return NS_OK;
}
static PRBool
CheckRuleForAttributesEnum(nsISupports *aRule, void *aData)
{
nsICSSRule *rule = NS_STATIC_CAST(nsICSSRule *, aRule);
CSSStyleSheetImpl *sheet = NS_STATIC_CAST(CSSStyleSheetImpl *, aData);
return NS_SUCCEEDED(sheet->CheckRuleForAttributes(rule));
}
NS_IMETHODIMP
CSSStyleSheetImpl::CheckRuleForAttributes(nsICSSRule *aRule)
{
PRInt32 ruleType = nsICSSRule::UNKNOWN_RULE;
aRule->GetType(ruleType);
switch (ruleType) {
case nsICSSRule::MEDIA_RULE: {
nsICSSMediaRule *mediaRule = (nsICSSMediaRule *)aRule;
return mediaRule->EnumerateRulesForwards(CheckRuleForAttributesEnum,
(void *)this);
}
case nsICSSRule::STYLE_RULE: {
nsICSSStyleRule *styleRule = NS_STATIC_CAST(nsICSSStyleRule *, aRule);
nsCSSSelector *iter;
for (iter = styleRule->FirstSelector(); iter; iter = iter->mNext) {
/* P.classname means we have to check the attribute "class" */
if (iter->mIDList) {
DependentAtomKey idKey(nsHTMLAtoms::id);
mInner->mRelevantAttributes.Put(&idKey, nsHTMLAtoms::id);
}
if (iter->mClassList) {
DependentAtomKey classKey(nsHTMLAtoms::kClass);
mInner->mRelevantAttributes.Put(&classKey, nsHTMLAtoms::kClass);
}
for (nsAttrSelector *sel = iter->mAttrList; sel; sel = sel->mNext) {
/* store it in this sheet's attributes-that-matter table */
/* XXX store tag name too, but handle collisions */
#ifdef DEBUG_shaver_off
nsAutoString str;
sel->mAttr->ToString(str);
char * chars = ToNewCString(str);
fprintf(stderr, "[%s@%p]", chars, this);
nsMemory::Free(chars);
#endif
DependentAtomKey key(sel->mAttr);
mInner->mRelevantAttributes.Put(&key, sel->mAttr);
}
// Search for the :lang() pseudo class. If it is there add
// the lang attribute to the relevant attribute list.
for (nsAtomStringList* p = iter->mPseudoClassList; p; p = p->mNext) {
if (p->mAtom == nsCSSPseudoClasses::lang) {
DependentAtomKey langKey(nsHTMLAtoms::lang);
mInner->mRelevantAttributes.Put(&langKey, nsHTMLAtoms::lang);
break;
}
}
}
} /* fall-through */
default:
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
{
// Important: If this function is ever made scriptable, we must add
// a security check here. See GetCSSRules below for an example.
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
{
if (mInner) {
aNameSpace = mInner->mNameSpace;
NS_IF_ADDREF(aNameSpace);
}
else {
aNameSpace = nsnull;
}
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;
}
#ifdef DEBUG
static void
ListRules(nsISupportsArray* aRules, FILE* aOut, PRInt32 aIndent)
{
PRUint32 count;
PRInt32 index;
if (aRules) {
aRules->Count(&count);
for (index = count - 1; index >= 0; --index) {
nsCOMPtr<nsICSSRule> rule = dont_AddRef((nsICSSRule*)aRules->ElementAt(index));
rule->List(aOut, aIndent);
}
}
}
struct ListEnumData {
ListEnumData(FILE* aOut, PRInt32 aIndent)
: mOut(aOut),
mIndent(aIndent)
{
}
FILE* mOut;
PRInt32 mIndent;
};
#if 0
static PRBool ListCascade(nsHashKey* aKey, void* aValue, void* aClosure)
{
AtomKey* key = (AtomKey*)aKey;
RuleCascadeData* cascade = (RuleCascadeData*)aValue;
ListEnumData* data = (ListEnumData*)aClosure;
fputs("\nRules in cascade order for medium: \"", data->mOut);
nsAutoString buffer;
key->mAtom->ToString(buffer);
fputs(NS_LossyConvertUCS2toASCII(buffer).get(), data->mOut);
fputs("\"\n", data->mOut);
ListRules(cascade->mWeightedRules, data->mOut, data->mIndent);
return PR_TRUE;
}
#endif
void CSSStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
{
PRInt32 index;
// Indent
for (index = aIndent; --index >= 0; ) fputs(" ", out);
if (! mInner) {
fputs("CSS Style Sheet - without inner data storage - ERROR\n", out);
return;
}
fputs("CSS Style Sheet: ", out);
nsCAutoString urlSpec;
nsresult rv = mInner->mURL->GetSpec(urlSpec);
if (NS_SUCCEEDED(rv) && !urlSpec.IsEmpty()) {
fputs(urlSpec.get(), out);
}
if (mMedia) {
fputs(" media: ", out);
index = 0;
PRUint32 count;
mMedia->Count(&count);
nsAutoString buffer;
while (index < PRInt32(count)) {
nsCOMPtr<nsIAtom> medium = dont_AddRef((nsIAtom*)mMedia->ElementAt(index++));
medium->ToString(buffer);
fputs(NS_LossyConvertUCS2toASCII(buffer).get(), out);
if (index < PRInt32(count)) {
fputs(", ", out);
}
}
}
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);
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as CSSStyleSheetImpl's size):
* 1) sizeof(*this) + sizeof the mImportsCollection + sizeof mCuleCollection)
*
* Contained / Aggregated data (not reported as CSSStyleSheetImpl's size):
* 1) mInner is delegated to be counted seperately
*
* Children / siblings / parents:
* 1) Recurse to mFirstChild
*
******************************************************************************/
void CSSStyleSheetImpl::SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize)
{
NS_ASSERTION(aSizeOfHandler != nsnull, "SizeOf handler cannot be null");
// first get the unique items collection
UNIQUE_STYLE_ITEMS(uniqueItems);
if(! uniqueItems->AddItem((void*)this)){
// this style sheet is already accounted for
return;
}
PRUint32 localSize=0;
// create a tag for this instance
nsCOMPtr<nsIAtom> tag;
tag = getter_AddRefs(NS_NewAtom("CSSStyleSheet"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(CSSStyleSheetImpl);
// add up the contained objects we won't delegate to:
// NOTE that we just add the sizeof the objects
// since the style data they contain is accounted for elsewhere
// - mImportsCollection
// - mRuleCollection
aSize += sizeof(mImportsCollection);
aSize += sizeof(mRuleCollection);
aSizeOfHandler->AddSize(tag,aSize);
// size the inner
if(mInner){
mInner->SizeOf(aSizeOfHandler, localSize);
}
// now travers the children (recursively, I'm sorry to say)
if(mFirstChild){
PRUint32 childSize=0;
mFirstChild->SizeOf(aSizeOfHandler, childSize);
}
}
#endif
static PRBool PR_CALLBACK
EnumClearRuleCascades(void* aProcessor, void* aData)
{
nsICSSStyleRuleProcessor* processor = (nsICSSStyleRuleProcessor*)aProcessor;
processor->ClearRuleCascades();
return PR_TRUE;
}
void
CSSStyleSheetImpl::ClearRuleCascades(void)
{
if (mRuleProcessors) {
mRuleProcessors->EnumerateForwards(EnumClearRuleCascades, nsnull);
}
if (mParent) {
CSSStyleSheetImpl* parent = (CSSStyleSheetImpl*)mParent;
parent->ClearRuleCascades();
}
}
nsresult
CSSStyleSheetImpl::WillDirty(void)
{
return EnsureUniqueInner();
}
void
CSSStyleSheetImpl::DidDirty(void)
{
ClearRuleCascades();
mDirty = PR_TRUE;
}
NS_IMETHODIMP
CSSStyleSheetImpl::IsModified(PRBool* aSheetModified) const
{
*aSheetModified = mDirty;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::SetModified(PRBool aModified)
{
mDirty = aModified;
return NS_OK;
}
// nsIDOMStyleSheet interface
NS_IMETHODIMP
CSSStyleSheetImpl::GetType(nsAString& aType)
{
aType.Assign(NS_LITERAL_STRING("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 (mDocument && (mDisabled != oldState)) {
mDocument->SetStyleSheetDisabledState(this, mDisabled);
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetOwnerNode(nsIDOMNode** aOwnerNode)
{
*aOwnerNode = mOwningNode;
NS_IF_ADDREF(*aOwnerNode);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetParentStyleSheet(nsIDOMStyleSheet** aParentStyleSheet)
{
NS_ENSURE_ARG_POINTER(aParentStyleSheet);
nsresult rv = NS_OK;
if (mParent) {
rv = mParent->QueryInterface(NS_GET_IID(nsIDOMStyleSheet),
(void **)aParentStyleSheet);
} else {
*aParentStyleSheet = nsnull;
}
return rv;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetHref(nsAString& aHref)
{
if (mInner && mInner->mURL) {
nsCAutoString str;
mInner->mURL->GetSpec(str);
aHref.Assign(NS_ConvertUTF8toUCS2(str));
}
else {
aHref.Truncate();
}
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetTitle(nsString& aTitle) const
{
aTitle = mTitle;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetTitle(nsAString& aTitle)
{
aTitle.Assign(mTitle);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetMedia(nsIDOMMediaList** aMedia)
{
NS_ENSURE_ARG_POINTER(aMedia);
*aMedia = nsnull;
if (!mMedia) {
nsCOMPtr<nsISupportsArray> tmp;
NS_NewISupportsArray(getter_AddRefs(tmp));
NS_ENSURE_TRUE(tmp, NS_ERROR_NULL_POINTER);
mMedia = new DOMMediaListImpl(tmp, this);
NS_IF_ADDREF(mMedia);
}
*aMedia = mMedia;
NS_IF_ADDREF(*aMedia);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetOwnerRule(nsIDOMCSSRule** aOwnerRule)
{
if (mOwnerRule) {
return CallQueryInterface(mOwnerRule, aOwnerRule);
}
*aOwnerRule = nsnull;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::GetCssRules(nsIDOMCSSRuleList** aCssRules)
{
//-- Security check: Only scripts from the same origin as the
// style sheet can access rule collections
// Get JSContext from stack
nsCOMPtr<nsIJSContextStack> stack =
do_GetService("@mozilla.org/js/xpc/ContextStack;1");
NS_ENSURE_TRUE(stack, NS_ERROR_FAILURE);
JSContext *cx = nsnull;
nsresult rv = NS_OK;
rv = stack->Peek(&cx);
NS_ENSURE_SUCCESS(rv, rv);
if (!cx)
return NS_ERROR_FAILURE;
// Get the security manager and do the same-origin check
nsCOMPtr<nsIScriptSecurityManager> secMan =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = secMan->CheckSameOrigin(cx, mInner->mURL);
if (NS_FAILED(rv)) {
return rv;
}
// OK, security check passed, so get the rule collection
if (nsnull == mRuleCollection) {
mRuleCollection = new CSSRuleListImpl(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 nsAString& aRule,
PRUint32 aIndex,
PRUint32* aReturn)
{
NS_ENSURE_TRUE(mInner, NS_ERROR_FAILURE);
nsresult result;
result = WillDirty();
if (NS_FAILED(result))
return result;
if (! mInner->mOrderedRules) {
result = NS_NewISupportsArray(&(mInner->mOrderedRules));
}
if (NS_FAILED(result))
return result;
PRUint32 count;
mInner->mOrderedRules->Count(&count);
if (aIndex > count)
return NS_ERROR_DOM_INDEX_SIZE_ERR;
nsCOMPtr<nsICSSLoader> loader;
nsCOMPtr<nsICSSParser> css;
nsCOMPtr<nsIHTMLContentContainer> htmlContainer(do_QueryInterface(mDocument));
if (htmlContainer) {
htmlContainer->GetCSSLoader(*getter_AddRefs(loader));
}
NS_ASSERTION(loader || !mDocument, "Document with no CSS loader!");
if (loader) {
result = loader->GetParserFor(this, getter_AddRefs(css));
}
else {
result = NS_NewCSSParser(getter_AddRefs(css));
if (css) {
css->SetStyleSheet(this);
}
}
if (NS_FAILED(result))
return result;
if (mDocument) {
result = mDocument->BeginUpdate();
if (NS_FAILED(result))
return result;
}
nsCOMPtr<nsISupportsArray> rules;
result = css->ParseRule(aRule, mInner->mURL, getter_AddRefs(rules));
if (NS_FAILED(result))
return result;
PRUint32 rulecount = 0;
rules->Count(&rulecount);
if (rulecount == 0 && !aRule.IsEmpty()) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
// Hierarchy checking. Just check the first and last rule in the list.
// check that we're not inserting before a charset rule
nsCOMPtr<nsICSSRule> nextRule;
PRInt32 nextType = nsICSSRule::UNKNOWN_RULE;
nextRule = dont_AddRef((nsICSSRule*)mInner->mOrderedRules->ElementAt(aIndex));
if (nextRule) {
nextRule->GetType(nextType);
if (nextType == nsICSSRule::CHARSET_RULE) {
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
// check last rule in list
nsCOMPtr<nsICSSRule> lastRule = dont_AddRef((nsICSSRule*)rules->ElementAt(rulecount-1));
PRInt32 lastType = nsICSSRule::UNKNOWN_RULE;
lastRule->GetType(lastType);
if (nextType == nsICSSRule::IMPORT_RULE &&
lastType != nsICSSRule::CHARSET_RULE &&
lastType != nsICSSRule::IMPORT_RULE) {
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
if (nextType == nsICSSRule::NAMESPACE_RULE &&
lastType != nsICSSRule::CHARSET_RULE &&
lastType != nsICSSRule::IMPORT_RULE &&
lastType != nsICSSRule::NAMESPACE_RULE) {
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
}
// check first rule in list
nsCOMPtr<nsICSSRule> firstRule = dont_AddRef((nsICSSRule*)rules->ElementAt(0));
PRInt32 firstType = nsICSSRule::UNKNOWN_RULE;
firstRule->GetType(firstType);
if (aIndex != 0) {
if (firstType == nsICSSRule::CHARSET_RULE) { // no inserting charset at nonzero position
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
nsCOMPtr<nsICSSRule> prevRule = dont_AddRef((nsICSSRule*)mInner->mOrderedRules->ElementAt(aIndex-1));
PRInt32 prevType = nsICSSRule::UNKNOWN_RULE;
prevRule->GetType(prevType);
if (firstType == nsICSSRule::IMPORT_RULE &&
prevType != nsICSSRule::CHARSET_RULE &&
prevType != nsICSSRule::IMPORT_RULE) {
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
if (firstType == nsICSSRule::NAMESPACE_RULE &&
prevType != nsICSSRule::CHARSET_RULE &&
prevType != nsICSSRule::IMPORT_RULE &&
prevType != nsICSSRule::NAMESPACE_RULE) {
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
}
result = mInner->mOrderedRules->InsertElementsAt(rules, aIndex);
NS_ENSURE_SUCCESS(result, result);
DidDirty();
nsCOMPtr<nsICSSRule> cssRule;
PRUint32 counter;
for (counter = 0; counter < rulecount; counter++) {
cssRule = dont_AddRef((nsICSSRule*)rules->ElementAt(counter));
cssRule->SetStyleSheet(this);
PRInt32 type = nsICSSRule::UNKNOWN_RULE;
cssRule->GetType(type);
if (type == nsICSSRule::NAMESPACE_RULE) {
if (! mInner->mNameSpace) {
nsContentUtils::GetNSManagerWeakRef()->CreateRootNameSpace(*getter_AddRefs(mInner->mNameSpace));
}
NS_ENSURE_TRUE(mInner->mNameSpace, NS_ERROR_FAILURE);
nsCOMPtr<nsICSSNameSpaceRule> nameSpaceRule(do_QueryInterface(cssRule));
nsCOMPtr<nsINameSpace> newNameSpace;
nsCOMPtr<nsIAtom> prefix;
nsAutoString urlSpec;
nameSpaceRule->GetPrefix(*getter_AddRefs(prefix));
nameSpaceRule->GetURLSpec(urlSpec);
mInner->mNameSpace->CreateChildNameSpace(prefix, urlSpec,
*getter_AddRefs(newNameSpace));
if (newNameSpace) {
mInner->mNameSpace = newNameSpace;
}
}
else {
CheckRuleForAttributes(cssRule);
}
// We don't notify immediately for @import rules, but rather when
// the sheet the rule is importing is loaded
PRBool notify = PR_TRUE;
if (type == nsICSSRule::IMPORT_RULE) {
nsCOMPtr<nsIDOMCSSImportRule> importRule(do_QueryInterface(cssRule));
NS_ASSERTION(importRule, "Rule which has type IMPORT_RULE and does not implement nsIDOMCSSImportRule!");
nsCOMPtr<nsIDOMCSSStyleSheet> childSheet;
importRule->GetStyleSheet(getter_AddRefs(childSheet));
if (!childSheet) {
notify = PR_FALSE;
}
}
if (mDocument && notify) {
result = mDocument->StyleRuleAdded(this, cssRule);
NS_ENSURE_SUCCESS(result, result);
}
}
if (mDocument) {
result = mDocument->EndUpdate();
NS_ENSURE_SUCCESS(result, result);
}
if (loader) {
loader->RecycleParser(css);
}
*aReturn = aIndex;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::DeleteRule(PRUint32 aIndex)
{
nsresult result = NS_ERROR_DOM_INDEX_SIZE_ERR;
// XXX TBI: handle @rule types
if (mInner && mInner->mOrderedRules) {
if (mDocument) {
result = mDocument->BeginUpdate();
if (NS_FAILED(result))
return result;
}
result = WillDirty();
if (NS_SUCCEEDED(result)) {
PRUint32 count;
mInner->mOrderedRules->Count(&count);
if (aIndex >= count)
return NS_ERROR_DOM_INDEX_SIZE_ERR;
nsCOMPtr<nsICSSRule> rule =
dont_AddRef((nsICSSRule*)mInner->mOrderedRules->ElementAt(aIndex));
if (rule) {
mInner->mOrderedRules->RemoveElementAt(aIndex);
rule->SetStyleSheet(nsnull);
DidDirty();
if (mDocument) {
result = mDocument->StyleRuleRemoved(this, rule);
NS_ENSURE_SUCCESS(result, result);
result = mDocument->EndUpdate();
NS_ENSURE_SUCCESS(result, result);
}
}
}
}
return result;
}
NS_IMETHODIMP
CSSStyleSheetImpl::DeleteRuleFromGroup(nsICSSGroupRule* aGroup, PRUint32 aIndex)
{
NS_ENSURE_ARG_POINTER(aGroup);
nsresult result;
nsCOMPtr<nsICSSRule> rule;
result = aGroup->GetStyleRuleAt(aIndex, *getter_AddRefs(rule));
NS_ENSURE_SUCCESS(result, result);
// check that the rule actually belongs to this sheet!
nsCOMPtr<nsIDOMCSSRule> domRule(do_QueryInterface(rule));
nsCOMPtr<nsIDOMCSSStyleSheet> ruleSheet;
result = domRule->GetParentStyleSheet(getter_AddRefs(ruleSheet));
NS_ENSURE_SUCCESS(result, result);
nsCOMPtr<nsIDOMCSSStyleSheet> thisSheet;
this->QueryInterface(NS_GET_IID(nsIDOMCSSStyleSheet), getter_AddRefs(thisSheet));
if (thisSheet != ruleSheet) {
return NS_ERROR_INVALID_ARG;
}
result = mDocument->BeginUpdate();
NS_ENSURE_SUCCESS(result, result);
result = WillDirty();
NS_ENSURE_SUCCESS(result, result);
result = aGroup->DeleteStyleRuleAt(aIndex);
NS_ENSURE_SUCCESS(result, result);
rule->SetStyleSheet(nsnull);
DidDirty();
result = mDocument->StyleRuleRemoved(this, rule);
NS_ENSURE_SUCCESS(result, result);
result = mDocument->EndUpdate();
NS_ENSURE_SUCCESS(result, result);
return NS_OK;
}
NS_IMETHODIMP
CSSStyleSheetImpl::InsertRuleIntoGroup(const nsAString & aRule, nsICSSGroupRule* aGroup, PRUint32 aIndex, PRUint32* _retval)
{
nsresult result;
// check that the group actually belongs to this sheet!
nsCOMPtr<nsIDOMCSSRule> domGroup(do_QueryInterface(aGroup));
nsCOMPtr<nsIDOMCSSStyleSheet> groupSheet;
result = domGroup->GetParentStyleSheet(getter_AddRefs(groupSheet));
NS_ENSURE_SUCCESS(result, result);
nsCOMPtr<nsIDOMCSSStyleSheet> thisSheet;
this->QueryInterface(NS_GET_IID(nsIDOMCSSStyleSheet), getter_AddRefs(thisSheet));
if (thisSheet != groupSheet) {
return NS_ERROR_INVALID_ARG;
}
// get the css parser
nsCOMPtr<nsICSSLoader> loader;
nsCOMPtr<nsICSSParser> css;
nsCOMPtr<nsIHTMLContentContainer> htmlContainer(do_QueryInterface(mDocument));
if (htmlContainer) {
htmlContainer->GetCSSLoader(*getter_AddRefs(loader));
}
NS_ASSERTION(loader || !mDocument, "Document with no CSS loader!");
if (loader) {
result = loader->GetParserFor(this, getter_AddRefs(css));
}
else {
result = NS_NewCSSParser(getter_AddRefs(css));
if (css) {
css->SetStyleSheet(this);
}
}
NS_ENSURE_SUCCESS(result, result);
// parse and grab the rule
result = mDocument->BeginUpdate();
NS_ENSURE_SUCCESS(result, result);
result = WillDirty();
NS_ENSURE_SUCCESS(result, result);
nsCOMPtr<nsISupportsArray> rules;
result = css->ParseRule(aRule, mInner->mURL, getter_AddRefs(rules));
NS_ENSURE_SUCCESS(result, result);
PRUint32 rulecount = 0;
rules->Count(&rulecount);
if (rulecount == 0 && !aRule.IsEmpty()) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
PRUint32 counter;
nsCOMPtr<nsICSSRule> rule;
for (counter = 0; counter < rulecount; counter++) {
// Only rulesets are allowed in a group as of CSS2
PRInt32 type = nsICSSRule::UNKNOWN_RULE;
rule = dont_AddRef((nsICSSRule*)rules->ElementAt(counter));
rule->GetType(type);
if (type != nsICSSRule::STYLE_RULE) {
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
}
result = aGroup->InsertStyleRulesAt(aIndex, rules);
NS_ENSURE_SUCCESS(result, result);
DidDirty();
for (counter = 0; counter < rulecount; counter++) {
rule = dont_AddRef((nsICSSRule*)rules->ElementAt(counter));
CheckRuleForAttributes(rule);
result = mDocument->StyleRuleAdded(this, rule);
NS_ENSURE_SUCCESS(result, result);
}
result = mDocument->EndUpdate();
NS_ENSURE_SUCCESS(result, result);
if (loader) {
loader->RecycleParser(css);
}
*_retval = aIndex;
return NS_OK;
}
// nsICSSLoaderObserver implementation
NS_IMETHODIMP
CSSStyleSheetImpl::StyleSheetLoaded(nsICSSStyleSheet*aSheet, PRBool aNotify)
{
#ifdef DEBUG
nsCOMPtr<nsIStyleSheet> styleSheet(do_QueryInterface(aSheet));
NS_ASSERTION(styleSheet, "Sheet not implementing nsIStyleSheet!\n");
nsCOMPtr<nsIStyleSheet> parentSheet;
aSheet->GetParentSheet(*getter_AddRefs(parentSheet));
nsCOMPtr<nsIStyleSheet> thisSheet;
QueryInterface(NS_GET_IID(nsIStyleSheet), getter_AddRefs(thisSheet));
NS_ASSERTION(thisSheet == parentSheet, "We are being notified of a sheet load for a sheet that is not our child!\n");
#endif
if (mDocument && aNotify) {
nsCOMPtr<nsIDOMCSSStyleSheet> domSheet(do_QueryInterface(aSheet));
NS_ENSURE_TRUE(domSheet, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIDOMCSSRule> ownerRule;
domSheet->GetOwnerRule(getter_AddRefs(ownerRule));
NS_ENSURE_TRUE(ownerRule, NS_ERROR_UNEXPECTED);
nsresult rv = mDocument->BeginUpdate();
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIStyleRule> styleRule(do_QueryInterface(ownerRule));
rv = mDocument->StyleRuleAdded(this, styleRule);
NS_ENSURE_SUCCESS(rv, rv);
rv = mDocument->EndUpdate();
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
// XXX for backwards compatibility and convenience
NS_EXPORT nsresult
NS_NewCSSStyleSheet(nsICSSStyleSheet** aInstancePtrResult, nsIURI* aURL)
{
nsICSSStyleSheet* sheet;
nsresult rv;
if (NS_FAILED(rv = NS_NewCSSStyleSheet(&sheet)))
return rv;
if (NS_FAILED(rv = sheet->Init(aURL))) {
NS_RELEASE(sheet);
return rv;
}
*aInstancePtrResult = sheet;
return NS_OK;
}
NS_EXPORT nsresult
NS_NewCSSStyleSheet(nsICSSStyleSheet** aInstancePtrResult)
{
if (aInstancePtrResult == nsnull) {
return NS_ERROR_NULL_POINTER;
}
CSSStyleSheetImpl *it = new CSSStyleSheetImpl();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(it);
*aInstancePtrResult = it;
return NS_OK;
}
// -------------------------------
// CSS Style rule processor implementation
//
CSSRuleProcessor::CSSRuleProcessor(void)
: mSheets(nsnull),
mRuleCascades(nsnull)
{
NS_INIT_ISUPPORTS();
}
static PRBool
DropProcessorReference(nsISupports* aSheet, void* aProcessor)
{
nsICSSStyleSheet* sheet = (nsICSSStyleSheet*)aSheet;
nsICSSStyleRuleProcessor* processor = (nsICSSStyleRuleProcessor*)aProcessor;
sheet->DropRuleProcessorReference(processor);
return PR_TRUE;
}
CSSRuleProcessor::~CSSRuleProcessor(void)
{
if (mSheets) {
mSheets->EnumerateForwards(DropProcessorReference, this);
NS_RELEASE(mSheets);
}
ClearRuleCascades();
}
NS_IMPL_ADDREF(CSSRuleProcessor);
NS_IMPL_RELEASE(CSSRuleProcessor);
nsresult
CSSRuleProcessor::QueryInterface(REFNSIID aIID, void** aInstancePtrResult)
{
if (NULL == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
if (aIID.Equals(NS_GET_IID(nsICSSStyleRuleProcessor))) {
*aInstancePtrResult = (void*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsIStyleRuleProcessor))) {
*aInstancePtrResult = (void*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtrResult = (void*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
CSSRuleProcessor::AppendStyleSheet(nsICSSStyleSheet* aStyleSheet)
{
nsresult result = NS_OK;
if (! mSheets) {
result = NS_NewISupportsArray(&mSheets);
}
if (mSheets) {
mSheets->AppendElement(aStyleSheet);
}
return result;
}
MOZ_DECL_CTOR_COUNTER(RuleProcessorData)
RuleProcessorData::RuleProcessorData(nsIPresContext* aPresContext,
nsIContent* aContent,
nsRuleWalker* aRuleWalker,
nsCompatibility* aCompat /*= nsnull*/)
{
MOZ_COUNT_CTOR(RuleProcessorData);
NS_PRECONDITION(aPresContext, "null pointer");
NS_ASSERTION(!aContent || aContent->IsContentOfType(nsIContent::eELEMENT),
"non-element leaked into SelectorMatches");
mPresContext = aPresContext;
mContent = aContent;
mParentContent = nsnull;
mRuleWalker = aRuleWalker;
mScopedRoot = nsnull;
mContentTag = nsnull;
mContentID = nsnull;
mStyledContent = nsnull;
mIsHTMLContent = PR_FALSE;
mIsHTMLLink = PR_FALSE;
mIsSimpleXLink = PR_FALSE;
mIsChecked = PR_FALSE;
mLinkState = eLinkState_Unknown;
mEventState = NS_EVENT_STATE_UNSPECIFIED;
mNameSpaceID = kNameSpaceID_Unknown;
mPreviousSiblingData = nsnull;
mParentData = nsnull;
mLanguage = nsnull;
// get the compat. mode (unless it is provided)
if(!aCompat) {
mPresContext->GetCompatibilityMode(&mCompatMode);
} else {
mCompatMode = *aCompat;
}
if(aContent){
// we hold no ref to the content...
mContent = aContent;
// get the namespace
aContent->GetNameSpaceID(mNameSpaceID);
// get the tag and parent
aContent->GetTag(mContentTag);
aContent->GetParent(mParentContent);
// get the event state
nsIEventStateManager* eventStateManager = nsnull;
mPresContext->GetEventStateManager(&eventStateManager);
if(eventStateManager) {
eventStateManager->GetContentState(aContent, mEventState);
NS_RELEASE(eventStateManager);
}
// get the styledcontent interface and the ID
if (NS_SUCCEEDED(aContent->QueryInterface(NS_GET_IID(nsIStyledContent), (void**)&mStyledContent))) {
NS_ASSERTION(mStyledContent, "Succeeded but returned null");
mStyledContent->GetID(mContentID);
}
// see if there are attributes for the content
PRInt32 attrCount = 0;
aContent->GetAttrCount(attrCount);
mHasAttributes = PRBool(attrCount > 0);
// check for HTMLContent and Link status
if (aContent->IsContentOfType(nsIContent::eHTML))
mIsHTMLContent = PR_TRUE;
// if HTML content and it has some attributes, check for an HTML link
// NOTE: optimization: cannot be a link if no attributes (since it needs an href)
if (mIsHTMLContent && mHasAttributes) {
// check if it is an HTML Link
if(nsStyleUtil::IsHTMLLink(aContent, mContentTag, mPresContext, &mLinkState)) {
mIsHTMLLink = PR_TRUE;
}
}
// if not an HTML link, check for a simple xlink (cannot be both HTML link and xlink)
// NOTE: optimization: cannot be an XLink if no attributes (since it needs an
if(!mIsHTMLLink &&
mHasAttributes &&
!(mIsHTMLContent || aContent->IsContentOfType(nsIContent::eXUL)) &&
nsStyleUtil::IsSimpleXlink(aContent, mPresContext, &mLinkState)) {
mIsSimpleXLink = PR_TRUE;
}
if (mIsHTMLContent) {
PRBool isChecked = PR_FALSE;
if (mContentTag == nsHTMLAtoms::option) {
nsCOMPtr<nsIDOMHTMLOptionElement> optEl = do_QueryInterface(mContent);
optEl->GetSelected(&isChecked);
} else if (mContentTag == nsHTMLAtoms::input) {
nsCOMPtr<nsIDOMHTMLInputElement> inputEl = do_QueryInterface(mContent);
inputEl->GetChecked(&isChecked);
}
mIsChecked = isChecked;
}
}
}
RuleProcessorData::~RuleProcessorData()
{
MOZ_COUNT_DTOR(RuleProcessorData);
if (mPreviousSiblingData)
mPreviousSiblingData->Destroy(mPresContext);
if (mParentData)
mParentData->Destroy(mPresContext);
NS_IF_RELEASE(mParentContent);
NS_IF_RELEASE(mContentTag);
NS_IF_RELEASE(mContentID);
NS_IF_RELEASE(mStyledContent);
delete mLanguage;
}
const nsString* RuleProcessorData::GetLang(void)
{
if (!mLanguage) {
mLanguage = new nsAutoString();
if (!mLanguage)
return nsnull;
nsCOMPtr<nsIContent> content = mContent;
while (content) {
PRInt32 attrCount = 0;
content->GetAttrCount(attrCount);
if (attrCount > 0) {
// xml:lang has precedence over lang on HTML elements (see
// XHTML1 section C.7).
nsAutoString value;
nsresult attrState = content->GetAttr(kNameSpaceID_XML,
nsHTMLAtoms::lang, value);
if (attrState != NS_CONTENT_ATTR_HAS_VALUE &&
content->IsContentOfType(nsIContent::eHTML)) {
attrState = content->GetAttr(kNameSpaceID_None,
nsHTMLAtoms::lang, value);
}
if (attrState == NS_CONTENT_ATTR_HAS_VALUE) {
*mLanguage = value;
break;
}
}
nsIContent *parent;
content->GetParent(parent);
content = dont_AddRef(parent);
}
}
return mLanguage;
}
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.get();
PRUnichar* start = (PRUnichar*)(const PRUnichar*)valueList.get();
PRUnichar* end = start;
while (kNullCh != *start) {
while ((kNullCh != *start) && nsCRT::IsAsciiSpace(*start)) { // skip leading space
start++;
}
end = start;
while ((kNullCh != *end) && (PR_FALSE == nsCRT::IsAsciiSpace(*end))) { // look for space or end
end++;
}
*end = kNullCh; // end string here
if (start < end) {
if (aCaseSensitive) {
if (!nsCRT::strcmp(value, start)) {
return PR_TRUE;
}
}
else {
if (nsDependentString(value).Equals(nsDependentString(start),
nsCaseInsensitiveStringComparator())) {
return PR_TRUE;
}
}
}
start = ++end;
}
return PR_FALSE;
}
inline PRBool IsEventPseudo(nsIAtom* aAtom)
{
return PRBool ((nsCSSPseudoClasses::active == aAtom) ||
(nsCSSPseudoClasses::mozDragOver == aAtom) ||
(nsCSSPseudoClasses::focus == aAtom) ||
(nsCSSPseudoClasses::hover == aAtom));
// XXX selected, enabled, disabled, selection?
}
inline PRBool IsLinkPseudo(nsIAtom* aAtom)
{
return PRBool ((nsCSSPseudoClasses::link == aAtom) ||
(nsCSSPseudoClasses::visited == aAtom) ||
(nsCSSPseudoClasses::mozAnyLink == aAtom));
}
// Return whether we should apply a "global" (i.e., universal-tag)
// selector for event states in quirks mode. Note that
// |data.mIsHTMLLink| is checked separately by the caller, so we return
// false for |nsHTMLAtoms::a|, which here means a named anchor.
inline PRBool IsQuirkEventSensitive(nsIAtom *aContentTag)
{
return PRBool ((nsHTMLAtoms::button == aContentTag) ||
(nsHTMLAtoms::img == aContentTag) ||
(nsHTMLAtoms::input == aContentTag) ||
(nsHTMLAtoms::label == aContentTag) ||
(nsHTMLAtoms::select == aContentTag) ||
(nsHTMLAtoms::textarea == aContentTag));
}
static PRBool IsSignificantChild(nsIContent* aChild, PRBool aAcceptNonWhitespaceText)
{
nsIAtom* tag;
aChild->GetTag(tag); // skip text & comments
if ((tag != nsLayoutAtoms::textTagName) &&
(tag != nsLayoutAtoms::commentTagName) &&
(tag != nsLayoutAtoms::processingInstructionTagName)) {
NS_IF_RELEASE(tag);
return PR_TRUE;
}
if (aAcceptNonWhitespaceText) {
if (tag == nsLayoutAtoms::textTagName) { // skip only whitespace text
nsITextContent* text = nsnull;
if (NS_SUCCEEDED(aChild->QueryInterface(NS_GET_IID(nsITextContent), (void**)&text))) {
PRBool isWhite;
text->IsOnlyWhitespace(&isWhite);
NS_RELEASE(text);
if (! isWhite) {
NS_RELEASE(tag);
return PR_TRUE;
}
}
}
}
NS_IF_RELEASE(tag);
return PR_FALSE;
}
static PRBool
DashMatchCompare(const nsAString& aAttributeValue,
const nsAString& aSelectorValue,
const PRBool aCaseSensitive)
{
PRBool result;
PRUint32 selectorLen = aSelectorValue.Length();
PRUint32 attributeLen = aAttributeValue.Length();
if (selectorLen > attributeLen) {
result = PR_FALSE;
}
else {
nsAString::const_iterator iter;
if (selectorLen != attributeLen &&
*aAttributeValue.BeginReading(iter).advance(selectorLen) !=
PRUnichar('-')) {
// to match, the aAttributeValue must have a dash after the end of
// the aSelectorValue's text (unless the aSelectorValue and the
// aAttributeValue have the same text)
result = PR_FALSE;
}
else {
const nsAString& attributeSubstring =
Substring(aAttributeValue, 0, selectorLen);
if (aCaseSensitive)
result = attributeSubstring.Equals(aSelectorValue);
else
result = attributeSubstring.Equals(aSelectorValue,
nsCaseInsensitiveStringComparator());
}
}
return result;
}
// NOTE: The |aStateMask| code isn't going to work correctly anymore if
// we start batching style changes, because if multiple states change in
// separate notifications then we might determine the style is not
// state-dependent when it really is (e.g., determining that a
// :hover:active rule no longer matches when both states are unset).
static PRBool SelectorMatches(RuleProcessorData &data,
nsCSSSelector* aSelector,
PRInt32 aStateMask, // states NOT to test
PRInt8 aNegationIndex)
{
// if we are dealing with negations, reverse the values of PR_TRUE and PR_FALSE
PRBool localFalse = PRBool(0 < aNegationIndex);
PRBool localTrue = PRBool(0 == aNegationIndex);
PRBool result = localTrue;
// Do not perform the test if aNegationIndex==1
// because it then contains only negated IDs, classes, attributes and pseudo-
// classes
if (1 != aNegationIndex) {
if (kNameSpaceID_Unknown != aSelector->mNameSpace) {
if (data.mNameSpaceID != aSelector->mNameSpace) {
result = localFalse;
}
}
if (localTrue == result) {
if ((nsnull != aSelector->mTag) && (aSelector->mTag != data.mContentTag)) {
result = localFalse;
}
}
// optimization : bail out early if we can
if (!result) {
return PR_FALSE;
}
}
result = PR_TRUE;
if (nsnull != aSelector->mPseudoClassList) { // test for pseudo class match
// first-child, root, lang, active, focus, hover, link, visited...
// XXX disabled, enabled, selected, selection
nsAtomStringList* pseudoClass = aSelector->mPseudoClassList;
while (result && (nsnull != pseudoClass)) {
if ((nsCSSPseudoClasses::firstChild == pseudoClass->mAtom) ||
(nsCSSPseudoClasses::firstNode == pseudoClass->mAtom) ) {
nsIContent* firstChild = nsnull;
nsIContent* parent = data.mParentContent;
if (parent) {
PRInt32 index = -1;
do {
parent->ChildAt(++index, firstChild);
if (firstChild) { // stop at first non-comment and non-whitespace node (and non-text node for firstChild)
if (IsSignificantChild(firstChild, (nsCSSPseudoClasses::firstNode == pseudoClass->mAtom))) {
break;
}
NS_RELEASE(firstChild);
}
else {
break;
}
} while (1 == 1);
}
result = PRBool(localTrue == (data.mContent == firstChild));
NS_IF_RELEASE(firstChild);
}
else if ((nsCSSPseudoClasses::lastChild == pseudoClass->mAtom) ||
(nsCSSPseudoClasses::lastNode == pseudoClass->mAtom)) {
nsIContent* lastChild = nsnull;
nsIContent* parent = data.mParentContent;
if (parent) {
PRInt32 index;
parent->ChildCount(index);
do {
parent->ChildAt(--index, lastChild);
if (lastChild) { // stop at first non-comment and non-whitespace node (and non-text node for lastChild)
if (IsSignificantChild(lastChild, (nsCSSPseudoClasses::lastNode == pseudoClass->mAtom))) {
break;
}
NS_RELEASE(lastChild);
}
else {
break;
}
} while (1 == 1);
}
result = PRBool(localTrue == (data.mContent == lastChild));
NS_IF_RELEASE(lastChild);
}
else if (nsCSSPseudoClasses::empty == pseudoClass->mAtom) {
nsIContent* child = nsnull;
nsIContent* element = data.mContent;
PRInt32 index = -1;
do {
element->ChildAt(++index, child);
if (child) { // stop at first non-comment and non-whitespace node
if (IsSignificantChild(child, PR_TRUE)) {
break;
}
NS_RELEASE(child);
}
else {
break;
}
} while (1 == 1);
result = PRBool(localTrue == (child == nsnull));
NS_IF_RELEASE(child);
}
else if (nsCSSPseudoClasses::root == pseudoClass->mAtom) {
if (data.mParentContent) {
result = localFalse;
}
else {
result = localTrue;
}
}
else if (nsCSSPseudoClasses::mozBoundElement == pseudoClass->mAtom) {
result = (data.mScopedRoot && data.mScopedRoot == data.mContent)
? localTrue : localFalse;
}
else if (nsCSSPseudoClasses::lang == pseudoClass->mAtom) {
NS_ASSERTION(nsnull != pseudoClass->mString, "null lang parameter");
result = localFalse;
if (pseudoClass->mString && *pseudoClass->mString) {
// We have to determine the language of the current element. Since
// this is currently no property and since the language is inherited
// from the parent we have to be prepared to look at all parent
// nodes. The language itself is encoded in the LANG attribute.
const nsString* lang = data.GetLang();
if (lang && !lang->IsEmpty()) { // null check for out-of-memory
result = localTrue == DashMatchCompare(*lang,
nsDependentString(pseudoClass->mString), PR_FALSE);
}
else {
nsCOMPtr<nsIDocument> doc;
data.mContent->GetDocument(*getter_AddRefs(doc));
if (doc) {
// Try to get the language from the HTTP header or if this
// is missing as well from the preferences.
// The content language can be a comma-separated list of
// language codes.
nsAutoString language;
if (NS_SUCCEEDED(doc->GetContentLanguage(language))) {
nsDependentString langString(pseudoClass->mString);
language.StripWhitespace();
PRInt32 begin = 0;
PRInt32 len = language.Length();
while (begin < len) {
PRInt32 end = language.FindChar(PRUnichar(','), begin);
if (end == kNotFound) {
end = len;
}
if (DashMatchCompare(Substring(language, begin, end-begin),
langString,
PR_FALSE)) {
result = localTrue;
break;
}
begin = end + 1;
}
}
}
}
}
}
else if (IsEventPseudo(pseudoClass->mAtom)) {
// check if the element is event-sensitive
if (data.mCompatMode == eCompatibility_NavQuirks &&
// global selector:
!aSelector->mTag && !aSelector->mClassList &&
!aSelector->mIDList && !aSelector->mAttrList &&
// :hover or :active
(nsCSSPseudoClasses::active == pseudoClass->mAtom ||
nsCSSPseudoClasses::hover == pseudoClass->mAtom) &&
// important for |IsQuirkEventSensitive|:
data.mIsHTMLContent && !data.mIsHTMLLink &&
!IsQuirkEventSensitive(data.mContentTag)) {
// In quirks mode, only make certain elements sensitive to
// selectors ":hover" and ":active".
// XXX Once we make ":active" work correctly (bug 65917) this
// quirk should apply only to ":hover" (if to anything at all).
result = localFalse;
} else {
if (nsCSSPseudoClasses::active == pseudoClass->mAtom) {
result = (aStateMask & NS_EVENT_STATE_ACTIVE) ||
(localTrue == (0 != (data.mEventState & NS_EVENT_STATE_ACTIVE)));
}
else if (nsCSSPseudoClasses::focus == pseudoClass->mAtom) {
result = (aStateMask & NS_EVENT_STATE_FOCUS) ||
(localTrue == (0 != (data.mEventState & NS_EVENT_STATE_FOCUS)));
}
else if (nsCSSPseudoClasses::hover == pseudoClass->mAtom) {
result = (aStateMask & NS_EVENT_STATE_HOVER) ||
(localTrue == (0 != (data.mEventState & NS_EVENT_STATE_HOVER)));
}
else if (nsCSSPseudoClasses::mozDragOver == pseudoClass->mAtom) {
result = (aStateMask & NS_EVENT_STATE_DRAGOVER) ||
(localTrue == (0 != (data.mEventState & NS_EVENT_STATE_DRAGOVER)));
}
}
}
else if (IsLinkPseudo(pseudoClass->mAtom)) {
if (data.mIsHTMLLink || data.mIsSimpleXLink) {
if (result) {
if (nsCSSPseudoClasses::mozAnyLink == pseudoClass->mAtom) {
result = localTrue;
}
else if (nsCSSPseudoClasses::link == pseudoClass->mAtom) {
result = PRBool(localTrue == (eLinkState_Unvisited == data.mLinkState));
}
else if (nsCSSPseudoClasses::visited == pseudoClass->mAtom) {
result = PRBool(localTrue == (eLinkState_Visited == data.mLinkState));
}
}
}
else {
result = localFalse; // not a link
}
}
else if (nsCSSPseudoClasses::checked == pseudoClass->mAtom) {
// This pseudoclass matches the selected state on the following elements:
// <option>
// <input type=checkbox>
// <input type=radio>
if (!(aStateMask & NS_EVENT_STATE_CHECKED))
result = data.mIsChecked ? localTrue : localFalse;
}
else {
result = localFalse; // unknown pseudo class
}
pseudoClass = pseudoClass->mNext;
}
}
// namespace/tag match
if (result && aSelector->mAttrList) { // test for attribute match
// if no attributes on the content, no match
if(!data.mHasAttributes) {
result = localFalse;
} else {
result = localTrue;
nsAttrSelector* attr = aSelector->mAttrList;
do {
if (!data.mContent->HasAttr(attr->mNameSpace, attr->mAttr)) {
result = localFalse;
}
else if (attr->mFunction != NS_ATTR_FUNC_SET) {
nsAutoString value;
#ifdef DEBUG
nsresult attrState =
#endif
data.mContent->GetAttr(attr->mNameSpace, attr->mAttr, value);
NS_ASSERTION(NS_SUCCEEDED(attrState) &&
NS_CONTENT_ATTR_NOT_THERE != attrState,
"HasAttr lied or GetAttr failed");
PRBool isCaseSensitive = attr->mCaseSensitive;
switch (attr->mFunction) {
case NS_ATTR_FUNC_EQUALS:
if (isCaseSensitive) {
result = localTrue == value.Equals(attr->mValue);
}
else {
result = localTrue == value.Equals(attr->mValue, nsCaseInsensitiveStringComparator());
}
break;
case NS_ATTR_FUNC_INCLUDES:
result = localTrue == ValueIncludes(value, attr->mValue, isCaseSensitive);
break;
case NS_ATTR_FUNC_DASHMATCH:
result = localTrue == DashMatchCompare(value, attr->mValue, isCaseSensitive);
break;
case NS_ATTR_FUNC_ENDSMATCH:
{
PRUint32 selLen = attr->mValue.Length();
PRUint32 valLen = value.Length();
if (selLen > valLen) {
result = localFalse;
} else {
if (isCaseSensitive)
result = localTrue == Substring(value, valLen - selLen, selLen).Equals(attr->mValue, nsDefaultStringComparator());
else
result = localTrue == Substring(value, valLen - selLen, selLen).Equals(attr->mValue, nsCaseInsensitiveStringComparator());
}
}
break;
case NS_ATTR_FUNC_BEGINSMATCH:
{
PRUint32 selLen = attr->mValue.Length();
PRUint32 valLen = value.Length();
if (selLen > valLen) {
result = localFalse;
} else {
if (isCaseSensitive)
result = localTrue == Substring(value, 0, selLen).Equals(attr->mValue, nsDefaultStringComparator());
else
result = localTrue == Substring(value, 0, selLen).Equals(attr->mValue, nsCaseInsensitiveStringComparator());
}
}
break;
case NS_ATTR_FUNC_CONTAINSMATCH:
result = localTrue == (FindInReadable(attr->mValue, value, nsCaseInsensitiveStringComparator()));
break;
}
}
attr = attr->mNext;
} while (result && (nsnull != attr));
}
}
if (result && (aSelector->mIDList || aSelector->mClassList)) {
// test for ID & class match
result = localFalse;
if (data.mStyledContent) {
// case sensitivity: bug 93371
PRBool isCaseSensitive = data.mCompatMode != eCompatibility_NavQuirks;
nsAtomList* IDList = aSelector->mIDList;
if (nsnull == IDList) {
result = PR_TRUE;
}
else if (nsnull != data.mContentID) {
result = PR_TRUE;
if (isCaseSensitive) {
do {
if (localTrue == (IDList->mAtom != data.mContentID)) {
result = PR_FALSE;
break;
}
IDList = IDList->mNext;
} while (IDList);
} else {
const PRUnichar* id1Str;
data.mContentID->GetUnicode(&id1Str);
nsDependentString id1(id1Str);
do {
const PRUnichar* id2Str;
IDList->mAtom->GetUnicode(&id2Str);
nsDependentString id2(id2Str);
if (localTrue !=
id1.Equals(id2, nsCaseInsensitiveStringComparator())) {
result = PR_FALSE;
break;
}
IDList = IDList->mNext;
} while (IDList);
}
}
if (result) {
nsAtomList* classList = aSelector->mClassList;
while (nsnull != classList) {
if (localTrue == (!data.mStyledContent->HasClass(classList->mAtom, isCaseSensitive))) {
result = PR_FALSE;
break;
}
classList = classList->mNext;
}
}
}
}
// apply SelectorMatches to the negated selectors in the chain
if (result && (nsnull != aSelector->mNegations)) {
result = SelectorMatches(data, aSelector->mNegations, aStateMask,
aNegationIndex+1);
}
return result;
}
static PRBool SelectorMatchesTree(RuleProcessorData &data,
nsCSSSelector* aSelector)
{
nsCSSSelector* selector = aSelector;
if (selector) {
nsIContent* content = nsnull;
nsIContent* lastContent = data.mContent;
NS_ADDREF(lastContent);
RuleProcessorData* curdata = &data;
while (nsnull != selector) { // check compound selectors
// Find the appropriate content (whether parent or previous sibling)
// to check next, and if we don't already have a RuleProcessorData
// for it, create one.
// for adjacent sibling combinators, the content to test against the
// selector is the previous sibling
nsCompatibility compat = curdata->mCompatMode;
RuleProcessorData* newdata;
if (PRUnichar('+') == selector->mOperator) {
newdata = curdata->mPreviousSiblingData;
if (!newdata) {
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);
newdata =
new (curdata->mPresContext) RuleProcessorData(curdata->mPresContext, content,
curdata->mRuleWalker, &compat);
curdata->mPreviousSiblingData = newdata;
break;
}
NS_RELEASE(content);
NS_IF_RELEASE(tag);
}
NS_RELEASE(parent);
}
} else {
content = newdata->mContent;
NS_ADDREF(content);
}
}
// for descendant combinators and child combinators, the content
// to test against is the parent
else {
newdata = curdata->mParentData;
if (!newdata) {
lastContent->GetParent(content);
if (content) {
newdata = new (curdata->mPresContext) RuleProcessorData(curdata->mPresContext, content,
curdata->mRuleWalker, &compat);
curdata->mParentData = newdata;
}
} else {
content = newdata->mContent;
NS_ADDREF(content);
}
}
if (! newdata) {
NS_ASSERTION(!content, "content must be null");
break;
}
if (SelectorMatches(*newdata, selector, 0, 0)) {
// to avoid greedy matching, we need to recurse if this is a
// descendant combinator and the next combinator is not
if ((NS_IS_GREEDY_OPERATOR(selector->mOperator)) &&
(selector->mNext) &&
(!NS_IS_GREEDY_OPERATOR(selector->mNext->mOperator))) {
// pretend the selector didn't match, and step through content
// while testing the same selector
// This approach is slightly strange is that when it recurses
// it tests from the top of the content tree, down. This
// doesn't matter much for performance since most selectors
// don't match. (If most did, it might be faster...)
if (SelectorMatchesTree(*newdata, selector)) {
selector = nsnull; // indicate success
break;
}
}
selector = selector->mNext;
}
else {
// for adjacent sibling and child combinators, if we didn't find
// a match, we're done
if (!NS_IS_GREEDY_OPERATOR(selector->mOperator)) {
NS_RELEASE(content);
break; // parent was required to match
}
}
NS_IF_RELEASE(lastContent);
lastContent = content; // take refcount
content = nsnull;
curdata = newdata;
}
NS_IF_RELEASE(lastContent);
}
return PRBool(nsnull == selector); // matches if ran out of selectors
}
static void ContentEnumFunc(nsICSSStyleRule* aRule, void* aData)
{
ElementRuleProcessorData* data = (ElementRuleProcessorData*)aData;
nsCSSSelector* selector = aRule->FirstSelector();
if (SelectorMatches(*data, selector, 0, 0)) {
selector = selector->mNext;
if (SelectorMatchesTree(*data, selector)) {
// for performance, require that every implementation of
// nsICSSStyleRule return the same pointer for nsIStyleRule (why
// would anything multiply inherit nsIStyleRule anyway?)
#ifdef DEBUG
nsCOMPtr<nsIStyleRule> iRule = do_QueryInterface(aRule);
NS_ASSERTION(NS_STATIC_CAST(nsIStyleRule*, aRule) == iRule.get(),
"Please fix QI so this performance optimization is valid");
#endif
data->mRuleWalker->Forward(NS_STATIC_CAST(nsIStyleRule*, aRule));
// nsStyleSet will deal with the !important rule
}
}
}
NS_IMETHODIMP
CSSRuleProcessor::RulesMatching(ElementRuleProcessorData *aData,
nsIAtom* aMedium)
{
NS_PRECONDITION(aData->mContent->IsContentOfType(nsIContent::eELEMENT),
"content must be element");
RuleCascadeData* cascade = GetRuleCascade(aData->mPresContext, aMedium);
if (cascade) {
nsAutoVoidArray classArray;
nsIStyledContent* styledContent = aData->mStyledContent;
if (styledContent)
styledContent->GetClasses(classArray);
cascade->mRuleHash.EnumerateAllRules(aData->mNameSpaceID, aData->mContentTag, aData->mContentID, classArray, ContentEnumFunc, aData);
}
return NS_OK;
}
static void PseudoEnumFunc(nsICSSStyleRule* aRule, void* aData)
{
PseudoRuleProcessorData* data = (PseudoRuleProcessorData*)aData;
nsCSSSelector* selector = aRule->FirstSelector();
NS_ASSERTION(selector->mTag == data->mPseudoTag, "RuleHash failure");
PRBool matches = PR_TRUE;
if (data->mComparator)
data->mComparator->PseudoMatches(data->mPseudoTag, selector, &matches);
if (matches) {
selector = selector->mNext;
if (selector) { // test next selector specially
if (PRUnichar('+') == selector->mOperator) {
return; // not valid here, can't match
}
if (SelectorMatches(*data, selector, 0, 0)) {
selector = selector->mNext;
}
else {
if (PRUnichar('>') == selector->mOperator) {
return; // immediate parent didn't match
}
}
}
if (selector &&
(! SelectorMatchesTree(*data, selector))) {
return; // remaining selectors didn't match
}
// for performance, require that every implementation of
// nsICSSStyleRule return the same pointer for nsIStyleRule (why
// would anything multiply inherit nsIStyleRule anyway?)
#ifdef DEBUG
nsCOMPtr<nsIStyleRule> iRule = do_QueryInterface(aRule);
NS_ASSERTION(NS_STATIC_CAST(nsIStyleRule*, aRule) == iRule.get(),
"Please fix QI so this performance optimization is valid");
#endif
data->mRuleWalker->Forward(NS_STATIC_CAST(nsIStyleRule*, aRule));
// nsStyleSet will deal with the !important rule
}
}
NS_IMETHODIMP
CSSRuleProcessor::RulesMatching(PseudoRuleProcessorData* aData,
nsIAtom* aMedium)
{
NS_PRECONDITION(!aData->mContent ||
aData->mContent->IsContentOfType(nsIContent::eELEMENT),
"content (if present) must be element");
RuleCascadeData* cascade = GetRuleCascade(aData->mPresContext, aMedium);
if (cascade) {
cascade->mRuleHash.EnumerateTagRules(aData->mPseudoTag,
PseudoEnumFunc, aData);
}
return NS_OK;
}
static
PRBool PR_CALLBACK StateEnumFunc(void* aSelector, void* aData)
{
StateRuleProcessorData* data = (StateRuleProcessorData*)aData;
nsCSSSelector* selector = (nsCSSSelector*)aSelector;
if (SelectorMatches(*data, selector, data->mStateMask, 0)) {
selector = selector->mNext;
if (SelectorMatchesTree(*data, selector)) {
return PR_FALSE;
}
}
return PR_TRUE;
}
NS_IMETHODIMP
CSSRuleProcessor::HasStateDependentStyle(StateRuleProcessorData* aData,
nsIAtom* aMedium,
PRBool* aResult)
{
NS_PRECONDITION(aData->mContent->IsContentOfType(nsIContent::eELEMENT),
"content must be element");
RuleCascadeData* cascade = GetRuleCascade(aData->mPresContext, aMedium);
// Look up the content node in the state rule list, which points to
// any (CSS2 definition) simple selector (whether or not it is the
// subject) that has a state pseudo-class on it. This means that this
// code will be matching selectors that aren't real selectors in any
// stylesheet (e.g., if there is a selector "body > p:hover > a", then
// "body > p:hover" will be in |cascade->mStateSelectors|). Note that
// |IsStateSelector| below determines which selectors are in
// |cascade->mStateSelectors|.
// The enumeration function signals the presence of state by stopping
// the enumeration, which is reflected in the return value from
// |EnumerateForwards|.
*aResult = cascade &&
!cascade->mStateSelectors.EnumerateForwards(StateEnumFunc, aData);
return NS_OK;
}
#ifdef DEBUG
struct CascadeSizeEnumData {
CascadeSizeEnumData(nsISizeOfHandler *aSizeOfHandler,
nsUniqueStyleItems *aUniqueStyleItem,
nsIAtom *aTag)
{
handler = aSizeOfHandler;
uniqueItems = aUniqueStyleItem;
tag = aTag;
}
// weak references all 'round
nsISizeOfHandler *handler;
nsUniqueStyleItems *uniqueItems;
nsIAtom *tag;
};
static
PRBool PR_CALLBACK StateSelectorsSizeEnumFunc( void *aSelector, void *aData )
{
nsCSSSelector* selector = (nsCSSSelector*)aSelector;
CascadeSizeEnumData *pData = (CascadeSizeEnumData *)aData;
NS_ASSERTION(selector && pData, "null arguments not supported");
if(! pData->uniqueItems->AddItem((void*)selector)){
return PR_TRUE;
}
// pass the call to the selector
PRUint32 localSize = 0;
selector->SizeOf(pData->handler, localSize);
return PR_TRUE;
}
static
PRBool WeightedRulesSizeEnumFunc( nsISupports *aRule, void *aData )
{
nsICSSStyleRule* rule = (nsICSSStyleRule*)aRule;
CascadeSizeEnumData *pData = (CascadeSizeEnumData *)aData;
NS_ASSERTION(rule && pData, "null arguments not supported");
if(! pData->uniqueItems->AddItem((void*)rule)){
return PR_TRUE;
}
PRUint32 localSize=0;
// pass the call to the rule
rule->SizeOf(pData->handler, localSize);
return PR_TRUE;
}
static
void CascadeSizeEnumFunc(RuleCascadeData *cascade, CascadeSizeEnumData *pData)
{
NS_ASSERTION(cascade && pData, "null arguments not supported");
// see if the cascade has already been counted
if(!(pData->uniqueItems->AddItem(cascade))){
return;
}
// record the size of the cascade data itself
PRUint32 localSize = sizeof(RuleCascadeData);
pData->handler->AddSize(pData->tag, localSize);
// next add up the selectors and the weighted rules for the cascade
nsCOMPtr<nsIAtom> stateSelectorSizeTag;
stateSelectorSizeTag = getter_AddRefs(NS_NewAtom("CascadeStateSelectors"));
CascadeSizeEnumData stateData(pData->handler,pData->uniqueItems,stateSelectorSizeTag);
cascade->mStateSelectors.EnumerateForwards(StateSelectorsSizeEnumFunc, &stateData);
if(cascade->mWeightedRules){
nsCOMPtr<nsIAtom> weightedRulesSizeTag;
weightedRulesSizeTag = getter_AddRefs(NS_NewAtom("CascadeWeightedRules"));
CascadeSizeEnumData stateData2(pData->handler,pData->uniqueItems,weightedRulesSizeTag);
cascade->mWeightedRules->EnumerateForwards(WeightedRulesSizeEnumFunc, &stateData2);
}
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as CSSRuleProcessor's size):
* 1) sizeof(*this)
*
* Contained / Aggregated data (not reported as CSSRuleProcessor's size):
* 1) Delegate to the StyleSheets in the mSheets collection
* 2) Delegate to the Rules in the CascadeTable
*
* Children / siblings / parents:
* none
*
******************************************************************************/
void CSSRuleProcessor::SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize)
{
NS_ASSERTION(aSizeOfHandler != nsnull, "SizeOf handler cannot be null");
// first get the unique items collection
UNIQUE_STYLE_ITEMS(uniqueItems);
if(! uniqueItems->AddItem((void*)this)){
return;
}
// create a tag for this instance
nsCOMPtr<nsIAtom> tag;
tag = getter_AddRefs(NS_NewAtom("CSSRuleProcessor"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(CSSRuleProcessor);
// collect sizes for the data
// - mSheets
// - mRuleCascades
// sheets first
if(mSheets && uniqueItems->AddItem(mSheets)){
PRUint32 sheetCount, curSheet, localSize2;
mSheets->Count(&sheetCount);
for(curSheet=0; curSheet < sheetCount; curSheet++){
nsCOMPtr<nsICSSStyleSheet> pSheet =
dont_AddRef((nsICSSStyleSheet*)mSheets->ElementAt(curSheet));
if(pSheet && uniqueItems->AddItem((void*)pSheet)){
pSheet->SizeOf(aSizeOfHandler, localSize2);
// XXX aSize += localSize2;
}
}
}
// and for the medium cascade table we account for the hash table overhead,
// and then compute the sizeof each rule-cascade in the table
{
nsCOMPtr<nsIAtom> tag2 = getter_AddRefs(NS_NewAtom("RuleCascade"));
CascadeSizeEnumData data(aSizeOfHandler, uniqueItems, tag2);
for (RuleCascadeData *cascadeData = mRuleCascades;
cascadeData;
cascadeData = cascadeData->mNext) {
CascadeSizeEnumFunc(cascadeData, &data);
}
}
// now add the size of the RuleProcessor
aSizeOfHandler->AddSize(tag,aSize);
}
#endif
NS_IMETHODIMP
CSSRuleProcessor::ClearRuleCascades(void)
{
RuleCascadeData *data = mRuleCascades;
mRuleCascades = nsnull;
while (data) {
RuleCascadeData *next = data->mNext;
delete data;
data = next;
}
return NS_OK;
}
// This function should return true only for selectors that need to be
// checked by |HasStateDependentStyle|.
inline
PRBool IsStateSelector(nsCSSSelector& aSelector)
{
nsAtomStringList* pseudoClass = aSelector.mPseudoClassList;
while (pseudoClass) {
if ((pseudoClass->mAtom == nsCSSPseudoClasses::active) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::checked) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::mozDragOver) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::focus) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::hover)) {
return PR_TRUE;
}
pseudoClass = pseudoClass->mNext;
}
return PR_FALSE;
}
static PRBool
BuildRuleHashAndStateSelectors(nsISupports* aRule, void* aCascade)
{
nsICSSStyleRule* rule = NS_STATIC_CAST(nsICSSStyleRule*, aRule);
RuleCascadeData *cascade = NS_STATIC_CAST(RuleCascadeData*, aCascade);
cascade->mRuleHash.PrependRule(rule);
nsVoidArray* array = &cascade->mStateSelectors;
for (nsCSSSelector* selector = rule->FirstSelector();
selector; selector = selector->mNext)
if (IsStateSelector(*selector))
array->AppendElement(selector);
return PR_TRUE;
}
struct CascadeEnumData {
CascadeEnumData(nsIAtom* aMedium)
: mMedium(aMedium),
mRuleArrays(64)
{
}
nsIAtom* mMedium;
nsSupportsHashtable mRuleArrays; // of nsISupportsArray
};
static PRBool
InsertRuleByWeight(nsISupports* aRule, void* aData)
{
nsICSSRule* rule = (nsICSSRule*)aRule;
CascadeEnumData* data = (CascadeEnumData*)aData;
PRInt32 type = nsICSSRule::UNKNOWN_RULE;
rule->GetType(type);
if (nsICSSRule::STYLE_RULE == type) {
nsICSSStyleRule* styleRule = (nsICSSStyleRule*)rule;
PRInt32 weight = styleRule->GetWeight();
nsPRUint32Key key(weight);
nsCOMPtr<nsISupportsArray> rules(dont_AddRef(
NS_STATIC_CAST(nsISupportsArray*, data->mRuleArrays.Get(&key))));
if (!rules) {
NS_NewISupportsArray(getter_AddRefs(rules));
if (!rules) return PR_FALSE; // out of memory
data->mRuleArrays.Put(&key, rules);
}
rules->AppendElement(styleRule);
}
else if (nsICSSRule::MEDIA_RULE == type) {
nsICSSMediaRule* mediaRule = (nsICSSMediaRule*)rule;
if (mediaRule->UseForMedium(data->mMedium)) {
mediaRule->EnumerateRulesForwards(InsertRuleByWeight, aData);
}
}
return PR_TRUE;
}
PRBool
CSSRuleProcessor::CascadeSheetRulesInto(nsISupports* aSheet, void* aData)
{
nsICSSStyleSheet* iSheet = (nsICSSStyleSheet*)aSheet;
CSSStyleSheetImpl* sheet = (CSSStyleSheetImpl*)iSheet;
CascadeEnumData* data = (CascadeEnumData*)aData;
PRBool bSheetEnabled = PR_TRUE;
sheet->GetEnabled(bSheetEnabled);
if ((bSheetEnabled) && (sheet->UseForMedium(data->mMedium))) {
CSSStyleSheetImpl* child = sheet->mFirstChild;
while (child) {
CascadeSheetRulesInto((nsICSSStyleSheet*)child, data);
child = child->mNext;
}
if (sheet->mInner && sheet->mInner->mOrderedRules) {
sheet->mInner->mOrderedRules->EnumerateForwards(InsertRuleByWeight, data);
}
}
return PR_TRUE;
}
struct RuleArrayData {
PRInt32 mWeight;
nsISupportsArray* mRuleArray;
};
PR_STATIC_CALLBACK(int) CompareArrayData(const void* aArg1, const void* aArg2,
void* closure)
{
const RuleArrayData* arg1 = NS_STATIC_CAST(const RuleArrayData*, aArg1);
const RuleArrayData* arg2 = NS_STATIC_CAST(const RuleArrayData*, aArg2);
return arg1->mWeight - arg2->mWeight; // put lower weight first
}
struct FillArrayData {
FillArrayData(RuleArrayData* aArrayData) :
mIndex(0),
mArrayData(aArrayData)
{
}
PRInt32 mIndex;
RuleArrayData* mArrayData;
};
PR_STATIC_CALLBACK(PRBool) FillArray(nsHashKey* aKey, void* aData,
void* aClosure)
{
nsPRUint32Key* key = NS_STATIC_CAST(nsPRUint32Key*, aKey);
nsISupportsArray* weightArray = NS_STATIC_CAST(nsISupportsArray*, aData);
FillArrayData* data = NS_STATIC_CAST(FillArrayData*, aClosure);
RuleArrayData& ruleData = data->mArrayData[data->mIndex++];
ruleData.mRuleArray = weightArray;
ruleData.mWeight = key->GetValue();
return PR_TRUE;
}
/**
* Takes the hashtable of arrays (keyed by weight, in order sort) and
* puts them all in one big array which has a primary sort by weight
* and secondary sort by order.
*/
static void PutRulesInList(nsSupportsHashtable* aRuleArrays,
nsISupportsArray* aWeightedRules)
{
PRInt32 arrayCount = aRuleArrays->Count();
RuleArrayData* arrayData = new RuleArrayData[arrayCount];
FillArrayData faData(arrayData);
aRuleArrays->Enumerate(FillArray, &faData);
NS_QuickSort(arrayData, arrayCount, sizeof(RuleArrayData),
CompareArrayData, nsnull);
for (PRInt32 i = 0; i < arrayCount; ++i)
aWeightedRules->AppendElements(arrayData[i].mRuleArray);
delete [] arrayData;
}
RuleCascadeData*
CSSRuleProcessor::GetRuleCascade(nsIPresContext* aPresContext, nsIAtom* aMedium)
{
RuleCascadeData **cascadep = &mRuleCascades;
RuleCascadeData *cascade;
while ((cascade = *cascadep)) {
if (cascade->mMedium == aMedium)
return cascade;
cascadep = &cascade->mNext;
}
if (mSheets) {
nsCompatibility quirkMode;
aPresContext->GetCompatibilityMode(&quirkMode);
cascade = new RuleCascadeData(aMedium,
eCompatibility_NavQuirks == quirkMode);
if (cascade) {
*cascadep = cascade;
CascadeEnumData data(aMedium);
mSheets->EnumerateForwards(CascadeSheetRulesInto, &data);
PutRulesInList(&data.mRuleArrays, cascade->mWeightedRules);
cascade->mWeightedRules->EnumerateBackwards(
BuildRuleHashAndStateSelectors, cascade);
}
}
return cascade;
}
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