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RetroZilla/layout/style/nsCSSStyleSheet.cpp
Ryan Nematz 2f2ae146c0 first commit
2015-10-20 23:03:22 -04:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:tabstop=2:expandtab:shiftwidth=2:
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 of 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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCSSStyleSheet.h"
#define PL_ARENA_CONST_ALIGN_MASK 7
#define NS_RULEHASH_ARENA_BLOCK_SIZE (256)
#include "plarena.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 "nsCSSRuleProcessor.h"
#include "nsICSSStyleRule.h"
#include "nsICSSNameSpaceRule.h"
#include "nsICSSGroupRule.h"
#include "nsICSSImportRule.h"
#include "nsIMediaList.h"
#include "nsIStyledContent.h"
#include "nsIDocument.h"
#include "nsPresContext.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 "nsIDOMHTMLInputElement.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsIDOMStyleSheetList.h"
#include "nsIDOMCSSStyleSheet.h"
#include "nsIDOMCSSRule.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 "nsXMLNameSpaceMap.h"
#include "nsITextContent.h"
#include "prlog.h"
#include "nsCOMPtr.h"
#include "nsHashKeys.h"
#include "nsStyleUtil.h"
#include "nsQuickSort.h"
#include "nsContentUtils.h"
#include "nsIJSContextStack.h"
#include "nsIScriptSecurityManager.h"
#include "nsAttrValue.h"
struct RuleValue {
/**
* |RuleValue|s are constructed before they become part of the
* |RuleHash|, to act as rule/selector pairs. |Add| is called when
* they are added to the |RuleHash|, and can be considered the second
* half of the constructor.
*
* |RuleValue|s are added to the rule hash from highest weight/order
* to lowest (since this is the fast way to build a singly linked
* list), so the index used to remember the order is backwards.
*/
RuleValue(nsICSSStyleRule* aRule, nsCSSSelector* aSelector)
: mRule(aRule), mSelector(aSelector) {}
RuleValue* Add(PRInt32 aBackwardIndex, RuleValue *aNext)
{
mBackwardIndex = aBackwardIndex;
mNext = aNext;
return this;
}
// 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()
{
// 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;
nsCSSSelector* mSelector; // which of |mRule|'s selectors
PRInt32 mBackwardIndex; // 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 char *match_str, *entry_str;
match_atom->GetUTF8String(&match_str);
entry_atom->GetUTF8String(&entry_str);
return (nsCRT::strcasecmp(entry_str, match_str) == 0);
}
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->mSelector->mTag;
}
PR_STATIC_CALLBACK(const void*)
RuleHash_ClassTable_GetKey(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*, hdr);
return entry->mRules->mSelector->mClassList->mAtom;
}
PR_STATIC_CALLBACK(const void*)
RuleHash_IdTable_GetKey(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*, hdr);
return entry->mRules->mSelector->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->mSelector->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->mSelector->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,
nsCSSSelector* aSelector,
void *aData);
class RuleHash {
public:
RuleHash(PRBool aQuirksMode);
~RuleHash();
void PrependRule(RuleValue *aRuleInfo);
void EnumerateAllRules(PRInt32 aNameSpace, nsIAtom* aTag, nsIAtom* aID,
const nsAttrValue* aClassList,
RuleEnumFunc aFunc, void* aData);
void EnumerateTagRules(nsIAtom* aTag,
RuleEnumFunc aFunc, void* aData);
PLArenaPool& Arena() { return mArena; }
protected:
void PrependRuleToTable(PLDHashTable* aTable, const void* aKey,
RuleValue* aRuleInfo);
void PrependUniversalRule(RuleValue* aRuleInfo);
// 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()
{
#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();
nsCOMPtr<nsIStyleSheet> sheet;
value->mRule->GetStyleSheet(*getter_AddRefs(sheet));
nsCOMPtr<nsICSSStyleSheet> cssSheet = do_QueryInterface(sheet);
value->mSelector->ToString(selectorText, cssSheet);
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,
RuleValue* aRuleInfo)
{
// Get a new or existing entry.
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(aTable, aKey, PL_DHASH_ADD));
if (!entry)
return;
entry->mRules = aRuleInfo->Add(mRuleCount++, entry->mRules);
}
void RuleHash::PrependUniversalRule(RuleValue *aRuleInfo)
{
mUniversalRules = aRuleInfo->Add(mRuleCount++, mUniversalRules);
}
void RuleHash::PrependRule(RuleValue *aRuleInfo)
{
nsCSSSelector *selector = aRuleInfo->mSelector;
if (nsnull != selector->mIDList) {
PrependRuleToTable(&mIdTable, selector->mIDList->mAtom, aRuleInfo);
RULE_HASH_STAT_INCREMENT(mIdSelectors);
}
else if (nsnull != selector->mClassList) {
PrependRuleToTable(&mClassTable, selector->mClassList->mAtom, aRuleInfo);
RULE_HASH_STAT_INCREMENT(mClassSelectors);
}
else if (nsnull != selector->mTag) {
PrependRuleToTable(&mTagTable, selector->mTag, aRuleInfo);
RULE_HASH_STAT_INCREMENT(mTagSelectors);
}
else if (kNameSpaceID_Unknown != selector->mNameSpace) {
PrependRuleToTable(&mNameSpaceTable,
NS_INT32_TO_PTR(selector->mNameSpace), aRuleInfo);
RULE_HASH_STAT_INCREMENT(mNameSpaceSelectors);
}
else { // universal tag selector
PrependUniversalRule(aRuleInfo);
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 nsAttrValue* aClassList,
RuleEnumFunc aFunc, void* aData)
{
PRInt32 classCount = aClassList ? aClassList->GetAtomCount() : 0;
// 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) {
RuleHashTableEntry *entry = NS_STATIC_CAST(RuleHashTableEntry*,
PL_DHashTableOperate(&mClassTable, aClassList->AtomAt(index),
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]->mBackwardIndex;
for (PRInt32 index = 1; index < valueCount; ++index) {
PRInt32 ruleIndex = mEnumList[index]->mBackwardIndex;
if (ruleIndex > highestRuleIndex) {
valueIndex = index;
highestRuleIndex = ruleIndex;
}
}
RuleValue *cur = mEnumList[valueIndex];
(*aFunc)(cur->mRule, cur->mSelector, aData);
RuleValue *next = cur->mNext;
mEnumList[valueIndex] = next ? next : mEnumList[--valueCount];
}
// Fast loop over single value.
RuleValue* value = mEnumList[0];
do {
(*aFunc)(value->mRule, value->mSelector, 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, tagValue->mSelector, aData);
tagValue = tagValue->mNext;
} while (tagValue);
}
}
//--------------------------------
// Attribute selectors hash table.
struct AttributeSelectorEntry : public PLDHashEntryHdr {
nsIAtom *mAttribute;
nsVoidArray *mSelectors;
};
PR_STATIC_CALLBACK(void)
AttributeSelectorClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
AttributeSelectorEntry *entry = NS_STATIC_CAST(AttributeSelectorEntry*, hdr);
delete entry->mSelectors;
memset(entry, 0, table->entrySize);
}
static PLDHashTableOps AttributeSelectorOps = {
PL_DHashAllocTable,
PL_DHashFreeTable,
PL_DHashGetKeyStub,
PL_DHashVoidPtrKeyStub,
PL_DHashMatchEntryStub,
PL_DHashMoveEntryStub,
AttributeSelectorClearEntry,
PL_DHashFinalizeStub,
NULL
};
//--------------------------------
struct RuleCascadeData {
RuleCascadeData(nsIAtom *aMedium, PRBool aQuirksMode)
: mRuleHash(aQuirksMode),
mStateSelectors(),
mMedium(aMedium),
mNext(nsnull)
{
PL_DHashTableInit(&mAttributeSelectors, &AttributeSelectorOps, nsnull,
sizeof(AttributeSelectorEntry), 16);
}
~RuleCascadeData()
{
PL_DHashTableFinish(&mAttributeSelectors);
}
RuleHash mRuleHash;
nsVoidArray mStateSelectors;
nsVoidArray mClassSelectors;
nsVoidArray mIDSelectors;
PLDHashTable mAttributeSelectors; // nsIAtom* -> nsVoidArray*
// Looks up or creates the appropriate list in |mAttributeSelectors|.
// Returns null only on allocation failure.
nsVoidArray* AttributeListFor(nsIAtom* aAttribute);
nsCOMPtr<nsIAtom> mMedium;
RuleCascadeData* mNext; // for a different medium
};
nsVoidArray*
RuleCascadeData::AttributeListFor(nsIAtom* aAttribute)
{
AttributeSelectorEntry *entry = NS_STATIC_CAST(AttributeSelectorEntry*,
PL_DHashTableOperate(&mAttributeSelectors, aAttribute, PL_DHASH_ADD));
if (!entry)
return nsnull;
if (!entry->mSelectors) {
if (!(entry->mSelectors = new nsVoidArray)) {
PL_DHashTableRawRemove(&mAttributeSelectors, entry);
return nsnull;
}
entry->mAttribute = aAttribute;
}
return entry->mSelectors;
}
// -------------------------------
// Style Rule List for the DOM
//
class CSSRuleListImpl : public nsIDOMCSSRuleList
{
public:
CSSRuleListImpl(nsCSSStyleSheet *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();
nsCSSStyleSheet* mStyleSheet;
public:
PRBool mRulesAccessed;
};
CSSRuleListImpl::CSSRuleListImpl(nsCSSStyleSheet *aStyleSheet)
{
// 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 = rule->GetDOMRule(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;
}
NS_INTERFACE_MAP_BEGIN(nsMediaList)
NS_INTERFACE_MAP_ENTRY(nsIDOMMediaList)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(MediaList)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsMediaList)
NS_IMPL_RELEASE(nsMediaList)
nsMediaList::nsMediaList()
: mStyleSheet(nsnull)
{
}
nsMediaList::~nsMediaList()
{
}
nsresult
nsMediaList::GetText(nsAString& aMediaText)
{
aMediaText.Truncate();
for (PRInt32 i = 0, i_end = mArray.Count(); i < i_end; ++i) {
nsIAtom* medium = mArray[i];
NS_ENSURE_TRUE(medium, NS_ERROR_FAILURE);
nsAutoString buffer;
medium->ToString(buffer);
aMediaText.Append(buffer);
if (i + 1 < i_end) {
aMediaText.AppendLiteral(", ");
}
}
return NS_OK;
}
// XXXbz this is so ill-defined in the spec, it's not clear quite what
// it should be doing....
nsresult
nsMediaList::SetText(const nsAString& aMediaText)
{
nsCOMPtr<nsICSSParser> parser;
nsresult rv = NS_NewCSSParser(getter_AddRefs(parser));
NS_ENSURE_SUCCESS(rv, rv);
PRBool htmlMode = PR_FALSE;
nsCOMPtr<nsIDOMStyleSheet> domSheet =
do_QueryInterface(NS_STATIC_CAST(nsICSSStyleSheet*, mStyleSheet));
if (domSheet) {
nsCOMPtr<nsIDOMNode> node;
domSheet->GetOwnerNode(getter_AddRefs(node));
htmlMode = !!node;
}
return parser->ParseMediaList(nsString(aMediaText), nsnull, 0,
this, htmlMode);
}
/*
* 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"
*/
PRBool
nsMediaList::Matches(nsPresContext* aPresContext)
{
if (-1 != mArray.IndexOf(aPresContext->Medium()) ||
-1 != mArray.IndexOf(nsLayoutAtoms::all))
return PR_TRUE;
return mArray.Count() == 0;
}
nsresult
nsMediaList::SetStyleSheet(nsICSSStyleSheet *aSheet)
{
NS_ASSERTION(aSheet == mStyleSheet || !aSheet || !mStyleSheet,
"multiple style sheets competing for one media list");
mStyleSheet = NS_STATIC_CAST(nsCSSStyleSheet*, aSheet);
return NS_OK;
}
nsresult
nsMediaList::Clone(nsMediaList** aResult)
{
nsRefPtr<nsMediaList> result = new nsMediaList();
if (!result)
return NS_ERROR_OUT_OF_MEMORY;
if (!result->mArray.AppendObjects(mArray))
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult = result);
return NS_OK;
}
NS_IMETHODIMP
nsMediaList::GetMediaText(nsAString& aMediaText)
{
return GetText(aMediaText);
}
// "sheet" should be an nsCSSStyleSheet and "doc" should be an
// nsCOMPtr<nsIDocument>
#define BEGIN_MEDIA_CHANGE(sheet, doc) \
if (sheet) { \
rv = sheet->GetOwningDocument(*getter_AddRefs(doc)); \
NS_ENSURE_SUCCESS(rv, rv); \
} \
mozAutoDocUpdate updateBatch(doc, UPDATE_STYLE, PR_TRUE); \
if (sheet) { \
rv = sheet->WillDirty(); \
NS_ENSURE_SUCCESS(rv, rv); \
}
#define END_MEDIA_CHANGE(sheet, doc) \
if (sheet) { \
sheet->DidDirty(); \
} \
/* XXXldb Pass something meaningful? */ \
if (doc) { \
doc->StyleRuleChanged(sheet, nsnull, nsnull); \
}
NS_IMETHODIMP
nsMediaList::SetMediaText(const nsAString& aMediaText)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIDocument> doc;
BEGIN_MEDIA_CHANGE(mStyleSheet, doc)
rv = SetText(aMediaText);
if (NS_FAILED(rv))
return rv;
END_MEDIA_CHANGE(mStyleSheet, doc)
return rv;
}
NS_IMETHODIMP
nsMediaList::GetLength(PRUint32* aLength)
{
NS_ENSURE_ARG_POINTER(aLength);
*aLength = mArray.Count();
return NS_OK;
}
NS_IMETHODIMP
nsMediaList::Item(PRUint32 aIndex, nsAString& aReturn)
{
PRInt32 index = aIndex;
if (0 <= index && index < Count()) {
MediumAt(aIndex)->ToString(aReturn);
} else {
SetDOMStringToNull(aReturn);
}
return NS_OK;
}
NS_IMETHODIMP
nsMediaList::DeleteMedium(const nsAString& aOldMedium)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIDocument> doc;
BEGIN_MEDIA_CHANGE(mStyleSheet, doc)
rv = Delete(aOldMedium);
if (NS_FAILED(rv))
return rv;
END_MEDIA_CHANGE(mStyleSheet, doc)
return rv;
}
NS_IMETHODIMP
nsMediaList::AppendMedium(const nsAString& aNewMedium)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIDocument> doc;
BEGIN_MEDIA_CHANGE(mStyleSheet, doc)
rv = Append(aNewMedium);
if (NS_FAILED(rv))
return rv;
END_MEDIA_CHANGE(mStyleSheet, doc)
return rv;
}
nsresult
nsMediaList::Delete(const nsAString& aOldMedium)
{
if (aOldMedium.IsEmpty())
return NS_ERROR_DOM_NOT_FOUND_ERR;
nsCOMPtr<nsIAtom> old = do_GetAtom(aOldMedium);
NS_ENSURE_TRUE(old, NS_ERROR_OUT_OF_MEMORY);
PRInt32 indx = mArray.IndexOf(old);
if (indx < 0) {
return NS_ERROR_DOM_NOT_FOUND_ERR;
}
mArray.RemoveObjectAt(indx);
return NS_OK;
}
nsresult
nsMediaList::Append(const nsAString& aNewMedium)
{
if (aNewMedium.IsEmpty())
return NS_ERROR_DOM_NOT_FOUND_ERR;
nsCOMPtr<nsIAtom> media = do_GetAtom(aNewMedium);
NS_ENSURE_TRUE(media, NS_ERROR_OUT_OF_MEMORY);
PRInt32 indx = mArray.IndexOf(media);
if (indx >= 0) {
mArray.RemoveObjectAt(indx);
}
mArray.AppendObject(media);
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)
{
// 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 (mStyleSheet) {
nsCOMPtr<nsICSSStyleSheet> sheet;
result = mStyleSheet->GetStyleSheetAt(aIndex, *getter_AddRefs(sheet));
if (NS_SUCCEEDED(result)) {
result = CallQueryInterface(sheet, aReturn);
}
}
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;
}
nsCSSStyleSheetInner::nsCSSStyleSheetInner(nsICSSStyleSheet* aParentSheet)
: mSheets(),
mOrderedRules(nsnull),
mComplete(PR_FALSE)
{
MOZ_COUNT_CTOR(nsCSSStyleSheetInner);
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;
}
nsCSSStyleSheetInner::nsCSSStyleSheetInner(nsCSSStyleSheetInner& aCopy,
nsICSSStyleSheet* aParentSheet)
: mSheets(),
mSheetURI(aCopy.mSheetURI),
mOriginalSheetURI(aCopy.mOriginalSheetURI),
mBaseURI(aCopy.mBaseURI),
mComplete(aCopy.mComplete)
{
MOZ_COUNT_CTOR(nsCSSStyleSheetInner);
mSheets.AppendElement(aParentSheet);
if (aCopy.mOrderedRules) {
NS_NewISupportsArray(&mOrderedRules);
if (mOrderedRules) {
aCopy.mOrderedRules->EnumerateForwards(CloneRuleInto, mOrderedRules);
mOrderedRules->EnumerateForwards(SetStyleSheetReference, aParentSheet);
}
}
else {
mOrderedRules = nsnull;
}
RebuildNameSpaces();
}
nsCSSStyleSheetInner::~nsCSSStyleSheetInner()
{
MOZ_COUNT_DTOR(nsCSSStyleSheetInner);
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(SetStyleSheetReference, nsnull);
NS_RELEASE(mOrderedRules);
}
}
nsCSSStyleSheetInner*
nsCSSStyleSheetInner::CloneFor(nsICSSStyleSheet* aParentSheet)
{
return new nsCSSStyleSheetInner(*this, aParentSheet);
}
void
nsCSSStyleSheetInner::AddSheet(nsICSSStyleSheet* aParentSheet)
{
mSheets.AppendElement(aParentSheet);
}
void
nsCSSStyleSheetInner::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;
nsXMLNameSpaceMap *nameSpaceMap =
NS_STATIC_CAST(nsXMLNameSpaceMap*, aNameSpacePtr);
nsIAtom* prefix = nsnull;
nsAutoString urlSpec;
nameSpaceRule->GetPrefix(prefix);
nameSpaceRule->GetURLSpec(urlSpec);
nameSpaceMap->AddPrefix(prefix, urlSpec);
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
nsCSSStyleSheetInner::RebuildNameSpaces()
{
if (mNameSpaceMap) {
mNameSpaceMap->Clear();
} else {
mNameSpaceMap = nsXMLNameSpaceMap::Create();
if (!mNameSpaceMap) {
return; // out of memory
}
}
if (mOrderedRules) {
mOrderedRules->EnumerateForwards(CreateNameSpace, mNameSpaceMap);
}
}
// -------------------------------
// CSS Style Sheet
//
MOZ_DECL_CTOR_COUNTER(nsCSSStyleSheet)
nsCSSStyleSheet::nsCSSStyleSheet()
: nsICSSStyleSheet_MOZILLA_1_8_BRANCH(),
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)
{
mInner = new nsCSSStyleSheetInner(this);
}
nsCSSStyleSheet::nsCSSStyleSheet(const nsCSSStyleSheet& aCopy,
nsICSSStyleSheet* aParentToUse,
nsICSSImportRule* aOwnerRuleToUse,
nsIDocument* aDocumentToUse,
nsIDOMNode* aOwningNodeToUse)
: nsICSSStyleSheet_MOZILLA_1_8_BRANCH(),
mRefCnt(0),
mTitle(aCopy.mTitle),
mMedia(nsnull),
mFirstChild(nsnull),
mNext(nsnull),
mParent(aParentToUse),
mOwnerRule(aOwnerRuleToUse),
mImportsCollection(nsnull), // re-created lazily
mRuleCollection(nsnull), // re-created lazily
mDocument(aDocumentToUse),
mOwningNode(aOwningNodeToUse),
mDisabled(aCopy.mDisabled),
mDirty(PR_FALSE),
mInner(aCopy.mInner),
mRuleProcessors(nsnull)
{
mInner->AddSheet(this);
if (aCopy.mRuleCollection &&
aCopy.mRuleCollection->mRulesAccessed) { // CSSOM's been there, force full copy now
NS_ASSERTION(mInner->mComplete, "Why have rules been accessed on an incomplete sheet?");
EnsureUniqueInner();
}
if (aCopy.mMedia) {
aCopy.mMedia->Clone(getter_AddRefs(mMedia));
}
if (aCopy.mFirstChild) {
nsCSSStyleSheet* otherChild = aCopy.mFirstChild;
nsCSSStyleSheet** ourSlot = &mFirstChild;
do {
// XXX This is wrong; we should be keeping @import rules and
// sheets in sync!
nsCSSStyleSheet* child = new nsCSSStyleSheet(*otherChild,
this,
nsnull,
aDocumentToUse,
nsnull);
if (child) {
NS_ADDREF(child);
(*ourSlot) = child;
ourSlot = &(child->mNext);
}
otherChild = otherChild->mNext;
}
while (otherChild && ourSlot);
}
}
nsCSSStyleSheet::~nsCSSStyleSheet()
{
if (mFirstChild) {
nsCSSStyleSheet* child = mFirstChild;
do {
child->mParent = nsnull;
child->mDocument = 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->SetStyleSheet(nsnull);
mMedia = nsnull;
}
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 nsCSSStyleSheet
NS_INTERFACE_MAP_BEGIN(nsCSSStyleSheet)
NS_INTERFACE_MAP_ENTRY(nsICSSStyleSheet)
NS_INTERFACE_MAP_ENTRY(nsICSSStyleSheet_MOZILLA_1_8_BRANCH)
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(nsCSSStyleSheet)
NS_IMPL_RELEASE(nsCSSStyleSheet)
NS_IMETHODIMP
nsCSSStyleSheet::AddRuleProcessor(nsCSSRuleProcessor* aProcessor)
{
if (! mRuleProcessors) {
mRuleProcessors = new nsAutoVoidArray();
if (!mRuleProcessors)
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ASSERTION(-1 == mRuleProcessors->IndexOf(aProcessor),
"processor already registered");
mRuleProcessors->AppendElement(aProcessor); // weak ref
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::DropRuleProcessor(nsCSSRuleProcessor* aProcessor)
{
if (!mRuleProcessors)
return NS_ERROR_FAILURE;
return mRuleProcessors->RemoveElement(aProcessor)
? NS_OK
: NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetURIs(nsIURI* aSheetURI, nsIURI* aBaseURI)
{
return SetURIs18(aSheetURI, nsnull, aBaseURI);
}
NS_IMETHODIMP
nsCSSStyleSheet::SetURIs18(nsIURI* aSheetURI, nsIURI* aOriginalSheetURI,
nsIURI* aBaseURI)
{
NS_PRECONDITION(aSheetURI && aBaseURI, "null ptr");
if (! mInner) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ASSERTION(!mInner->mOrderedRules && !mInner->mComplete,
"Can't call SetURL on sheets that are complete or have rules");
mInner->mSheetURI = aSheetURI;
mInner->mOriginalSheetURI = aOriginalSheetURI;
mInner->mBaseURI = aBaseURI;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetSheetURI(nsIURI** aSheetURI) const
{
NS_IF_ADDREF(*aSheetURI = (mInner ? mInner->mSheetURI.get() : nsnull));
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetBaseURI(nsIURI** aBaseURI) const
{
NS_IF_ADDREF(*aBaseURI = (mInner ? mInner->mBaseURI.get() : nsnull));
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetTitle(const nsAString& aTitle)
{
mTitle = aTitle;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetType(nsString& aType) const
{
aType.AssignLiteral("text/css");
return NS_OK;
}
NS_IMETHODIMP_(PRBool)
nsCSSStyleSheet::UseForMedium(nsPresContext* aPresContext) const
{
if (mMedia) {
return mMedia->Matches(aPresContext);
}
return PR_TRUE;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetMedia(nsMediaList* aMedia)
{
mMedia = aMedia;
return NS_OK;
}
NS_IMETHODIMP_(PRBool)
nsCSSStyleSheet::HasRules() const
{
PRInt32 count;
StyleRuleCount(count);
return count != 0;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetApplicable(PRBool& aApplicable) const
{
aApplicable = !mDisabled && mInner && mInner->mComplete;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetEnabled(PRBool aEnabled)
{
return nsCSSStyleSheet::SetDisabled(!aEnabled);
}
NS_IMETHODIMP
nsCSSStyleSheet::GetComplete(PRBool& aComplete) const
{
aComplete = mInner && mInner->mComplete;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetComplete()
{
if (!mInner)
return NS_ERROR_UNEXPECTED;
NS_ASSERTION(!mDirty, "Can't set a dirty sheet complete!");
mInner->mComplete = PR_TRUE;
if (mDocument && !mDisabled) {
// Let the document know
mDocument->BeginUpdate(UPDATE_STYLE);
mDocument->SetStyleSheetApplicableState(this, PR_TRUE);
mDocument->EndUpdate(UPDATE_STYLE);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetParentSheet(nsIStyleSheet*& aParent) const
{
aParent = mParent;
NS_IF_ADDREF(aParent);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetOwningDocument(nsIDocument*& aDocument) const
{
aDocument = mDocument;
NS_IF_ADDREF(aDocument);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetOwningDocument(nsIDocument* aDocument)
{ // not ref counted
mDocument = aDocument;
// Now set the same document on all our child sheets....
for (nsCSSStyleSheet* child = mFirstChild; child; child = child->mNext) {
child->SetOwningDocument(aDocument);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetOwningNode(nsIDOMNode* aOwningNode)
{ // not ref counted
mOwningNode = aOwningNode;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetOwnerRule(nsICSSImportRule* aOwnerRule)
{ // not ref counted
mOwnerRule = aOwnerRule;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetOwnerRule(nsICSSImportRule** aOwnerRule)
{
*aOwnerRule = mOwnerRule;
NS_IF_ADDREF(*aOwnerRule);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::ContainsStyleSheet(nsIURI* aURL, PRBool& aContains, nsIStyleSheet** aTheChild /*=nsnull*/)
{
NS_PRECONDITION(nsnull != aURL, "null arg");
if (!mInner || !mInner->mSheetURI) {
// We're not yet far enough along in our load to know what our URL is (we
// may still get redirected and such). Assert (caller should really not be
// calling this on us at this stage) and return.
NS_ERROR("ContainsStyleSheet called on a sheet that's still loading");
aContains = PR_FALSE;
return NS_OK;
}
// first check ourself out
nsresult rv = mInner->mSheetURI->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 {
nsCSSStyleSheet* 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
nsCSSStyleSheet::AppendStyleSheet(nsICSSStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (NS_SUCCEEDED(WillDirty())) {
NS_ADDREF(aSheet);
nsCSSStyleSheet* sheet = (nsCSSStyleSheet*)aSheet;
if (! mFirstChild) {
mFirstChild = sheet;
}
else {
nsCSSStyleSheet* 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;
sheet->mDocument = mDocument;
DidDirty();
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::InsertStyleSheetAt(nsICSSStyleSheet* aSheet, PRInt32 aIndex)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
nsresult result = WillDirty();
if (NS_SUCCEEDED(result)) {
NS_ADDREF(aSheet);
nsCSSStyleSheet* sheet = (nsCSSStyleSheet*)aSheet;
nsCSSStyleSheet* 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;
sheet->mDocument = mDocument;
DidDirty();
}
return result;
}
NS_IMETHODIMP
nsCSSStyleSheet::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();
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::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->mNameSpaceMap) {
mInner->mNameSpaceMap = nsXMLNameSpaceMap::Create();
NS_ENSURE_TRUE(mInner->mNameSpaceMap, NS_ERROR_OUT_OF_MEMORY);
}
nsCOMPtr<nsICSSNameSpaceRule> nameSpaceRule(do_QueryInterface(aRule));
nsCOMPtr<nsIAtom> prefix;
nsAutoString urlSpec;
nameSpaceRule->GetPrefix(*getter_AddRefs(prefix));
nameSpaceRule->GetURLSpec(urlSpec);
mInner->mNameSpaceMap->AddPrefix(prefix, urlSpec);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::ReplaceStyleRule(nsICSSRule* aOld, nsICSSRule* aNew)
{
NS_PRECONDITION(mInner->mOrderedRules, "can't have old rule");
NS_PRECONDITION(mInner && mInner->mComplete,
"No replacing in an incomplete sheet!");
if (NS_SUCCEEDED(WillDirty())) {
PRInt32 index = mInner->mOrderedRules->IndexOf(aOld);
NS_ENSURE_TRUE(index != -1, NS_ERROR_UNEXPECTED);
mInner->mOrderedRules->ReplaceElementAt(aNew, index);
aNew->SetStyleSheet(this);
aOld->SetStyleSheet(nsnull);
DidDirty();
#ifdef DEBUG
PRInt32 type = nsICSSRule::UNKNOWN_RULE;
aNew->GetType(type);
NS_ASSERTION(nsICSSRule::NAMESPACE_RULE != type, "not yet implemented");
aOld->GetType(type);
NS_ASSERTION(nsICSSRule::NAMESPACE_RULE != type, "not yet implemented");
#endif
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::StyleRuleCount(PRInt32& aCount) const
{
aCount = 0;
if (mInner && mInner->mOrderedRules) {
PRUint32 cnt;
nsresult rv = ((nsCSSStyleSheet*)this)->mInner->mOrderedRules->Count(&cnt); // XXX bogus cast -- this method should not be const
aCount = (PRInt32)cnt;
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::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;
}
nsXMLNameSpaceMap*
nsCSSStyleSheet::GetNameSpaceMap() const
{
if (mInner)
return mInner->mNameSpaceMap;
return nsnull;
}
NS_IMETHODIMP
nsCSSStyleSheet::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 nsCSSStyleSheet* child = mFirstChild;
while (child) {
aCount++;
child = child->mNext;
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::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 nsCSSStyleSheet* child = mFirstChild;
while ((child) && (0 != aIndex)) {
--aIndex;
child = child->mNext;
}
aSheet = (nsICSSStyleSheet*)child;
NS_IF_ADDREF(aSheet);
}
return NS_OK;
}
nsresult
nsCSSStyleSheet::EnsureUniqueInner()
{
if (! mInner) {
return NS_ERROR_NOT_INITIALIZED;
}
if (1 < mInner->mSheets.Count()) {
nsCSSStyleSheetInner* clone = mInner->CloneFor(this);
if (clone) {
mInner->RemoveSheet(this);
mInner = clone;
}
else {
return NS_ERROR_OUT_OF_MEMORY;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::Clone(nsICSSStyleSheet* aCloneParent,
nsICSSImportRule* aCloneOwnerRule,
nsIDocument* aCloneDocument,
nsIDOMNode* aCloneOwningNode,
nsICSSStyleSheet** aClone) const
{
NS_PRECONDITION(aClone, "Null out param!");
nsCSSStyleSheet* clone = new nsCSSStyleSheet(*this,
aCloneParent,
aCloneOwnerRule,
aCloneDocument,
aCloneOwningNode);
if (clone) {
*aClone = NS_STATIC_CAST(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 nsCSSStyleSheet::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->mSheetURI->GetSpec(urlSpec);
if (NS_SUCCEEDED(rv) && !urlSpec.IsEmpty()) {
fputs(urlSpec.get(), out);
}
if (mMedia) {
fputs(" media: ", out);
nsAutoString buffer;
mMedia->GetText(buffer);
fputs(NS_ConvertUTF16toUTF8(buffer).get(), out);
}
fputs("\n", out);
const nsCSSStyleSheet* 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);
}
#endif
static PRBool PR_CALLBACK
EnumClearRuleCascades(void* aProcessor, void* aData)
{
nsCSSRuleProcessor* processor =
NS_STATIC_CAST(nsCSSRuleProcessor*, aProcessor);
processor->ClearRuleCascades();
return PR_TRUE;
}
void
nsCSSStyleSheet::ClearRuleCascades()
{
if (mRuleProcessors) {
mRuleProcessors->EnumerateForwards(EnumClearRuleCascades, nsnull);
}
if (mParent) {
nsCSSStyleSheet* parent = (nsCSSStyleSheet*)mParent;
parent->ClearRuleCascades();
}
}
nsresult
nsCSSStyleSheet::WillDirty()
{
if (mInner && !mInner->mComplete) {
// Do nothing
return NS_OK;
}
return EnsureUniqueInner();
}
void
nsCSSStyleSheet::DidDirty()
{
ClearRuleCascades();
mDirty = PR_TRUE;
}
NS_IMETHODIMP
nsCSSStyleSheet::IsModified(PRBool* aSheetModified) const
{
*aSheetModified = mDirty;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetModified(PRBool aModified)
{
mDirty = aModified;
return NS_OK;
}
// nsIDOMStyleSheet interface
NS_IMETHODIMP
nsCSSStyleSheet::GetType(nsAString& aType)
{
aType.AssignLiteral("text/css");
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetDisabled(PRBool* aDisabled)
{
*aDisabled = mDisabled;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetDisabled(PRBool aDisabled)
{
PRBool oldDisabled = mDisabled;
mDisabled = aDisabled;
if (mDocument && mInner && mInner->mComplete && oldDisabled != mDisabled) {
ClearRuleCascades();
mDocument->BeginUpdate(UPDATE_STYLE);
mDocument->SetStyleSheetApplicableState(this, !mDisabled);
mDocument->EndUpdate(UPDATE_STYLE);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetOwnerNode(nsIDOMNode** aOwnerNode)
{
*aOwnerNode = mOwningNode;
NS_IF_ADDREF(*aOwnerNode);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::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
nsCSSStyleSheet::GetHref(nsAString& aHref)
{
if (mInner && mInner->mOriginalSheetURI) {
nsCAutoString str;
mInner->mOriginalSheetURI->GetSpec(str);
CopyUTF8toUTF16(str, aHref);
} else {
SetDOMStringToNull(aHref);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetTitle(nsString& aTitle) const
{
aTitle = mTitle;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetTitle(nsAString& aTitle)
{
aTitle.Assign(mTitle);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetMedia(nsIDOMMediaList** aMedia)
{
NS_ENSURE_ARG_POINTER(aMedia);
*aMedia = nsnull;
if (!mMedia) {
mMedia = new nsMediaList();
NS_ENSURE_TRUE(mMedia, NS_ERROR_OUT_OF_MEMORY);
mMedia->SetStyleSheet(this);
}
*aMedia = mMedia;
NS_ADDREF(*aMedia);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetOwnerRule(nsIDOMCSSRule** aOwnerRule)
{
if (mOwnerRule) {
return mOwnerRule->GetDOMRule(aOwnerRule);
}
*aOwnerRule = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetCssRules(nsIDOMCSSRuleList** aCssRules)
{
// No doing this on incomplete sheets!
PRBool complete;
GetComplete(complete);
if (!complete) {
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
//-- 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
rv = nsContentUtils::GetSecurityManager()->CheckSameOrigin(cx,
mInner->mSheetURI);
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
nsCSSStyleSheet::InsertRule(const nsAString& aRule,
PRUint32 aIndex,
PRUint32* aReturn)
{
NS_ENSURE_TRUE(mInner, NS_ERROR_FAILURE);
// No doing this if the sheet is not complete!
PRBool complete;
GetComplete(complete);
if (!complete) {
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
if (aRule.IsEmpty()) {
// Nothing to do here
return NS_OK;
}
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;
// Hold strong ref to the CSSLoader in case the document update
// kills the document
nsCOMPtr<nsICSSLoader> loader;
if (mDocument) {
loader = mDocument->CSSLoader();
NS_ASSERTION(loader, "Document with no CSS loader!");
}
nsCOMPtr<nsICSSParser> css;
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;
mozAutoDocUpdate updateBatch(mDocument, UPDATE_STYLE, PR_TRUE);
nsCOMPtr<nsISupportsArray> rules;
result = css->ParseRule(aRule, mInner->mSheetURI, mInner->mBaseURI,
getter_AddRefs(rules));
if (NS_FAILED(result))
return result;
PRUint32 rulecount = 0;
rules->Count(&rulecount);
if (rulecount == 0) {
// Since we know aRule was not an empty string, just throw
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;
}
}
PRBool insertResult = mInner->mOrderedRules->InsertElementsAt(rules, aIndex);
NS_ENSURE_TRUE(insertResult, NS_ERROR_OUT_OF_MEMORY);
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->mNameSpaceMap) {
mInner->mNameSpaceMap = nsXMLNameSpaceMap::Create();
NS_ENSURE_TRUE(mInner->mNameSpaceMap, NS_ERROR_OUT_OF_MEMORY);
}
nsCOMPtr<nsICSSNameSpaceRule> nameSpaceRule(do_QueryInterface(cssRule));
nsCOMPtr<nsIAtom> prefix;
nsAutoString urlSpec;
nameSpaceRule->GetPrefix(*getter_AddRefs(prefix));
nameSpaceRule->GetURLSpec(urlSpec);
mInner->mNameSpaceMap->AddPrefix(prefix, urlSpec);
}
// 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) {
mDocument->StyleRuleAdded(this, cssRule);
}
}
if (loader) {
loader->RecycleParser(css);
}
*aReturn = aIndex;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::DeleteRule(PRUint32 aIndex)
{
nsresult result = NS_ERROR_DOM_INDEX_SIZE_ERR;
// No doing this if the sheet is not complete!
PRBool complete;
GetComplete(complete);
if (!complete) {
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
// XXX TBI: handle @rule types
if (mInner && mInner->mOrderedRules) {
mozAutoDocUpdate updateBatch(mDocument, UPDATE_STYLE, PR_TRUE);
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) {
mDocument->StyleRuleRemoved(this, rule);
}
}
}
}
return result;
}
NS_IMETHODIMP
nsCSSStyleSheet::DeleteRuleFromGroup(nsICSSGroupRule* aGroup, PRUint32 aIndex)
{
NS_ENSURE_ARG_POINTER(aGroup);
NS_ASSERTION(mInner && mInner->mComplete,
"No deleting from an incomplete sheet!");
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<nsIStyleSheet> ruleSheet;
rule->GetStyleSheet(*getter_AddRefs(ruleSheet));
if (this != ruleSheet) {
return NS_ERROR_INVALID_ARG;
}
mozAutoDocUpdate updateBatch(mDocument, UPDATE_STYLE, PR_TRUE);
result = WillDirty();
NS_ENSURE_SUCCESS(result, result);
result = aGroup->DeleteStyleRuleAt(aIndex);
NS_ENSURE_SUCCESS(result, result);
rule->SetStyleSheet(nsnull);
DidDirty();
if (mDocument) {
mDocument->StyleRuleRemoved(this, rule);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::InsertRuleIntoGroup(const nsAString & aRule,
nsICSSGroupRule* aGroup,
PRUint32 aIndex,
PRUint32* _retval)
{
nsresult result;
NS_ASSERTION(mInner && mInner->mComplete,
"No inserting into an incomplete sheet!");
// check that the group actually belongs to this sheet!
nsCOMPtr<nsIStyleSheet> groupSheet;
aGroup->GetStyleSheet(*getter_AddRefs(groupSheet));
if (this != groupSheet) {
return NS_ERROR_INVALID_ARG;
}
if (aRule.IsEmpty()) {
// Nothing to do here
return NS_OK;
}
// Hold strong ref to the CSSLoader in case the document update
// kills the document
nsCOMPtr<nsICSSLoader> loader;
if (mDocument) {
loader = mDocument->CSSLoader();
NS_ASSERTION(loader, "Document with no CSS loader!");
}
nsCOMPtr<nsICSSParser> css;
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
mozAutoDocUpdate updateBatch(mDocument, UPDATE_STYLE, PR_TRUE);
result = WillDirty();
NS_ENSURE_SUCCESS(result, result);
nsCOMPtr<nsISupportsArray> rules;
result = css->ParseRule(aRule, mInner->mSheetURI, mInner->mBaseURI,
getter_AddRefs(rules));
NS_ENSURE_SUCCESS(result, result);
PRUint32 rulecount = 0;
rules->Count(&rulecount);
if (rulecount == 0) {
// Since we know aRule was not an empty string, just throw
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));
if (mDocument) {
mDocument->StyleRuleAdded(this, rule);
}
}
if (loader) {
loader->RecycleParser(css);
}
*_retval = aIndex;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::ReplaceRuleInGroup(nsICSSGroupRule* aGroup,
nsICSSRule* aOld, nsICSSRule* aNew)
{
nsresult result;
NS_PRECONDITION(mInner && mInner->mComplete,
"No replacing in an incomplete sheet!");
#ifdef DEBUG
{
nsCOMPtr<nsIStyleSheet> groupSheet;
aGroup->GetStyleSheet(*getter_AddRefs(groupSheet));
NS_ASSERTION(this == groupSheet, "group doesn't belong to this sheet");
}
#endif
result = WillDirty();
NS_ENSURE_SUCCESS(result, result);
result = aGroup->ReplaceStyleRule(aOld, aNew);
DidDirty();
return result;
}
// nsICSSLoaderObserver implementation
NS_IMETHODIMP
nsCSSStyleSheet::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<nsICSSImportRule> ownerRule;
aSheet->GetOwnerRule(getter_AddRefs(ownerRule));
mozAutoDocUpdate updateBatch(mDocument, UPDATE_STYLE, PR_TRUE);
// XXXldb @import rules shouldn't even implement nsIStyleRule (but
// they do)!
nsCOMPtr<nsIStyleRule> styleRule(do_QueryInterface(ownerRule));
mDocument->StyleRuleAdded(this, styleRule);
}
return NS_OK;
}
nsresult
NS_NewCSSStyleSheet(nsICSSStyleSheet** aInstancePtrResult)
{
nsCSSStyleSheet *it = new nsCSSStyleSheet();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(it);
*aInstancePtrResult = it;
return NS_OK;
}
// -------------------------------
// CSS Style rule processor implementation
//
nsCSSRuleProcessor::nsCSSRuleProcessor(const nsCOMArray<nsICSSStyleSheet>& aSheets)
: mSheets(aSheets),
mRuleCascades(nsnull)
{
for (PRInt32 i = mSheets.Count() - 1; i >= 0; --i)
mSheets[i]->AddRuleProcessor(this);
}
nsCSSRuleProcessor::~nsCSSRuleProcessor()
{
for (PRInt32 i = mSheets.Count() - 1; i >= 0; --i)
mSheets[i]->DropRuleProcessor(this);
mSheets.Clear();
ClearRuleCascades();
}
NS_IMPL_ISUPPORTS1(nsCSSRuleProcessor, nsIStyleRuleProcessor)
MOZ_DECL_CTOR_COUNTER(RuleProcessorData)
RuleProcessorData::RuleProcessorData(nsPresContext* 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;
mLinkState = eLinkState_Unknown;
mEventState = 0;
mNameSpaceID = kNameSpaceID_Unknown;
mPreviousSiblingData = nsnull;
mParentData = nsnull;
mLanguage = nsnull;
// get the compat. mode (unless it is provided)
if(!aCompat) {
mCompatMode = mPresContext->CompatibilityMode();
} else {
mCompatMode = *aCompat;
}
if(aContent){
// we hold no ref to the content...
mContent = aContent;
// get the tag and parent
mContentTag = aContent->Tag();
mParentContent = aContent->GetParent();
// get the event state
mPresContext->EventStateManager()->GetContentState(aContent, mEventState);
// 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");
mContentID = mStyledContent->GetID();
}
// see if there are attributes for the content
mHasAttributes = aContent->GetAttrCount() > 0;
// check for HTMLContent and Link status
if (aContent->IsContentOfType(nsIContent::eHTML)) {
mIsHTMLContent = PR_TRUE;
// Note that we want to treat non-XML HTML content as XHTML for namespace
// purposes, since html.css has that namespace declared.
mNameSpaceID = kNameSpaceID_XHTML;
} else {
// get the namespace
mNameSpaceID = aContent->GetNameSpaceID();
}
// 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;
}
}
}
RuleProcessorData::~RuleProcessorData()
{
MOZ_COUNT_DTOR(RuleProcessorData);
// Destroy potentially long chains of previous sibling and parent data
// without more than one level of recursion.
if (mPreviousSiblingData || mParentData) {
nsAutoVoidArray destroyQueue;
destroyQueue.AppendElement(this);
do {
RuleProcessorData *d = NS_STATIC_CAST(RuleProcessorData*,
destroyQueue.FastElementAt(destroyQueue.Count() - 1));
destroyQueue.RemoveElementAt(destroyQueue.Count() - 1);
if (d->mPreviousSiblingData) {
destroyQueue.AppendElement(d->mPreviousSiblingData);
d->mPreviousSiblingData = nsnull;
}
if (d->mParentData) {
destroyQueue.AppendElement(d->mParentData);
d->mParentData = nsnull;
}
if (d != this)
d->Destroy(mPresContext);
} while (destroyQueue.Count());
}
NS_IF_RELEASE(mStyledContent);
delete mLanguage;
}
const nsString* RuleProcessorData::GetLang()
{
if (!mLanguage) {
mLanguage = new nsAutoString();
if (!mLanguage)
return nsnull;
for (nsIContent* content = mContent; content;
content = content->GetParent()) {
if (content->GetAttrCount() > 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;
}
}
}
}
return mLanguage;
}
static const PRUnichar kNullCh = PRUnichar('\0');
static PRBool ValueIncludes(const nsSubstring& aValueList,
const nsSubstring& aValue,
const nsStringComparator& aComparator)
{
const PRUnichar *p = aValueList.BeginReading(),
*p_end = aValueList.EndReading();
while (p < p_end) {
// skip leading space
while (p != p_end && nsCRT::IsAsciiSpace(*p))
++p;
const PRUnichar *val_start = p;
// look for space or end
while (p != p_end && !nsCRT::IsAsciiSpace(*p))
++p;
const PRUnichar *val_end = p;
if (val_start < val_end &&
aValue.Equals(Substring(val_start, val_end), aComparator))
return PR_TRUE;
++p; // we know the next character is not whitespace
}
return PR_FALSE;
}
inline PRBool IsEventPseudo(nsIAtom* aAtom)
{
return nsCSSPseudoClasses::active == aAtom ||
nsCSSPseudoClasses::mozDragOver == aAtom ||
nsCSSPseudoClasses::focus == aAtom ||
nsCSSPseudoClasses::hover == aAtom ||
nsCSSPseudoClasses::target == 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 aTextIsSignificant, PRBool aWhitespaceIsSignificant)
{
NS_ASSERTION(!aWhitespaceIsSignificant || aTextIsSignificant,
"Nonsensical arguments");
PRBool isText = aChild->IsContentOfType(nsIContent::eTEXT);
if (!isText && !aChild->IsContentOfType(nsIContent::eCOMMENT) &&
!aChild->IsContentOfType(nsIContent::ePROCESSING_INSTRUCTION)) {
return PR_TRUE;
}
if (aTextIsSignificant && isText) {
if (!aWhitespaceIsSignificant) {
nsCOMPtr<nsITextContent> text = do_QueryInterface(aChild);
if (text && !text->IsOnlyWhitespace())
return PR_TRUE;
}
else {
return PR_TRUE;
}
}
return PR_FALSE;
}
// This function is to be called once we have fetched a value for an attribute
// whose namespace and name match those of aAttrSelector. This function
// performs comparisons on the value only, based on aAttrSelector->mFunction.
static PRBool AttrMatchesValue(const nsAttrSelector* aAttrSelector,
const nsString& aValue)
{
NS_PRECONDITION(aAttrSelector, "Must have an attribute selector");
const nsDefaultStringComparator defaultComparator;
const nsCaseInsensitiveStringComparator ciComparator;
const nsStringComparator& comparator = aAttrSelector->mCaseSensitive
? NS_STATIC_CAST(const nsStringComparator&, defaultComparator)
: NS_STATIC_CAST(const nsStringComparator&, ciComparator);
switch (aAttrSelector->mFunction) {
case NS_ATTR_FUNC_EQUALS:
return aValue.Equals(aAttrSelector->mValue, comparator);
case NS_ATTR_FUNC_INCLUDES:
return ValueIncludes(aValue, aAttrSelector->mValue, comparator);
case NS_ATTR_FUNC_DASHMATCH:
return nsStyleUtil::DashMatchCompare(aValue, aAttrSelector->mValue, comparator);
case NS_ATTR_FUNC_ENDSMATCH:
return StringEndsWith(aValue, aAttrSelector->mValue, comparator);
case NS_ATTR_FUNC_BEGINSMATCH:
return StringBeginsWith(aValue, aAttrSelector->mValue, comparator);
case NS_ATTR_FUNC_CONTAINSMATCH:
return FindInReadable(aAttrSelector->mValue, aValue, comparator);
default:
NS_NOTREACHED("Shouldn't be ending up here");
return PR_FALSE;
}
}
#define STATE_CHECK(_state) \
((aStateMask & (_state)) || \
(localTrue == (0 != (data.mEventState & (_state)))))
// 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
nsIAtom* aAttribute, // attribute NOT to test
PRInt8 aNegationIndex)
{
// if we are dealing with negations, reverse the values of PR_TRUE and PR_FALSE
PRBool localFalse = 0 < aNegationIndex;
PRBool localTrue = 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;
// test for pseudo class match
// first-child, root, lang, active, focus, hover, link, visited...
// XXX disabled, enabled, selected, selection
for (nsAtomStringList* pseudoClass = aSelector->mPseudoClassList;
pseudoClass && result; pseudoClass = pseudoClass->mNext) {
if ((nsCSSPseudoClasses::firstChild == pseudoClass->mAtom) ||
(nsCSSPseudoClasses::firstNode == pseudoClass->mAtom) ) {
nsIContent *firstChild = nsnull;
nsIContent *parent = data.mParentContent;
if (parent) {
PRBool acceptNonWhitespace =
nsCSSPseudoClasses::firstNode == pseudoClass->mAtom;
PRInt32 index = -1;
do {
firstChild = parent->GetChildAt(++index);
// stop at first non-comment and non-whitespace node (and
// non-text node for firstChild)
} while (firstChild &&
!IsSignificantChild(firstChild, acceptNonWhitespace, PR_FALSE));
}
result = localTrue == (data.mContent == firstChild);
}
else if ((nsCSSPseudoClasses::lastChild == pseudoClass->mAtom) ||
(nsCSSPseudoClasses::lastNode == pseudoClass->mAtom)) {
nsIContent *lastChild = nsnull;
nsIContent *parent = data.mParentContent;
if (parent) {
PRBool acceptNonWhitespace =
nsCSSPseudoClasses::lastNode == pseudoClass->mAtom;
PRUint32 index = parent->GetChildCount();
do {
lastChild = parent->GetChildAt(--index);
// stop at first non-comment and non-whitespace node (and
// non-text node for lastChild)
} while (lastChild &&
!IsSignificantChild(lastChild, acceptNonWhitespace, PR_FALSE));
}
result = localTrue == (data.mContent == lastChild);
}
else if (nsCSSPseudoClasses::onlyChild == pseudoClass->mAtom) {
nsIContent *onlyChild = nsnull;
nsIContent *moreChild = nsnull;
nsIContent *parent = data.mParentContent;
if (parent) {
PRInt32 index = -1;
do {
onlyChild = parent->GetChildAt(++index);
// stop at first non-comment, non-whitespace and non-text node
} while (onlyChild &&
!IsSignificantChild(onlyChild, PR_FALSE, PR_FALSE));
if (data.mContent == onlyChild) {
// see if there's any more
do {
moreChild = parent->GetChildAt(++index);
} while (moreChild && !IsSignificantChild(moreChild, PR_FALSE, PR_FALSE));
}
}
result = localTrue == (data.mContent == onlyChild &&
moreChild == nsnull);
}
else if (nsCSSPseudoClasses::empty == pseudoClass->mAtom ||
nsCSSPseudoClasses::mozOnlyWhitespace == pseudoClass->mAtom) {
nsIContent *child = nsnull;
nsIContent *element = data.mContent;
PRBool isWhitespaceSignificant =
nsCSSPseudoClasses::empty == pseudoClass->mAtom;
PRInt32 index = -1;
do {
child = element->GetChildAt(++index);
// stop at first non-comment (and non-whitespace for
// :-moz-only-whitespace) node
} while (child && !IsSignificantChild(child, PR_TRUE, isWhitespaceSignificant));
result = localTrue == (child == nsnull);
}
else if (nsCSSPseudoClasses::root == pseudoClass->mAtom) {
if (data.mParentContent) {
result = localFalse;
}
else {
result = localTrue;
}
}
else if (nsCSSPseudoClasses::mozBoundElement == pseudoClass->mAtom) {
// XXXldb How do we know where the selector came from? And what
// if there are multiple bindings, and we should be matching the
// outer one?
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 == nsStyleUtil::DashMatchCompare(*lang,
nsDependentString(pseudoClass->mString),
nsCaseInsensitiveStringComparator());
}
else {
nsIDocument* doc = data.mContent->GetDocument();
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;
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 (nsStyleUtil::DashMatchCompare(Substring(language, begin, end-begin),
langString,
nsCaseInsensitiveStringComparator())) {
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 (but don't check .class):
!aSelector->mTag && !aSelector->mIDList && !aSelector->mAttrList &&
// This (or the other way around) both make :not() asymmetric
// in quirks mode (and it's hard to work around since we're
// testing the current mNegations, not the first
// (unnegated)). This at least makes it closer to the spec.
aNegationIndex == 0 &&
// :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".
result = localFalse;
} else {
if (nsCSSPseudoClasses::active == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_ACTIVE);
}
else if (nsCSSPseudoClasses::focus == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_FOCUS);
}
else if (nsCSSPseudoClasses::hover == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_HOVER);
}
else if (nsCSSPseudoClasses::mozDragOver == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_DRAGOVER);
}
else if (nsCSSPseudoClasses::target == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_URLTARGET);
}
}
}
else if (IsLinkPseudo(pseudoClass->mAtom)) {
if (data.mIsHTMLLink || data.mIsSimpleXLink) {
if (nsCSSPseudoClasses::mozAnyLink == pseudoClass->mAtom) {
result = localTrue;
}
else if (nsCSSPseudoClasses::link == pseudoClass->mAtom) {
result = (aStateMask & NS_EVENT_STATE_VISITED) ||
localTrue == (eLinkState_Unvisited == data.mLinkState);
}
else if (nsCSSPseudoClasses::visited == pseudoClass->mAtom) {
result = (aStateMask & NS_EVENT_STATE_VISITED) ||
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>
result = STATE_CHECK(NS_EVENT_STATE_CHECKED);
}
else if (nsCSSPseudoClasses::enabled == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_ENABLED);
}
else if (nsCSSPseudoClasses::disabled == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_DISABLED);
}
else if (nsCSSPseudoClasses::required == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_REQUIRED);
}
else if (nsCSSPseudoClasses::optional == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_OPTIONAL);
}
else if (nsCSSPseudoClasses::valid == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_VALID);
}
else if (nsCSSPseudoClasses::invalid == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_INVALID);
}
else if (nsCSSPseudoClasses::inRange == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_INRANGE);
}
else if (nsCSSPseudoClasses::outOfRange == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_OUTOFRANGE);
}
else if (nsCSSPseudoClasses::mozReadOnly == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_MOZ_READONLY);
}
else if (nsCSSPseudoClasses::mozReadWrite == pseudoClass->mAtom) {
result = STATE_CHECK(NS_EVENT_STATE_MOZ_READWRITE);
}
else if (nsCSSPseudoClasses::mozIsHTML == pseudoClass->mAtom) {
result =
(data.mIsHTMLContent &&
data.mContent->GetNameSpaceID() == kNameSpaceID_None) ? localTrue :
localFalse;
}
else {
NS_ERROR("CSS parser parsed a pseudo-class that we do not handle");
result = PR_FALSE; // unknown pseudo class
}
}
// namespace/tag match
if (result && aSelector->mAttrList) {
// test for attribute match
if (!data.mHasAttributes && !aAttribute) {
// if no attributes on the content, no match
result = localFalse;
} else {
result = localTrue;
nsAttrSelector* attr = aSelector->mAttrList;
do {
if (attr->mAttr == aAttribute) {
// XXX we should really have a namespace, not just an attr
// name, in HasAttributeDependentStyle!
result = PR_TRUE;
}
else if (attr->mNameSpace == kNameSpaceID_Unknown) {
// Attr selector with a wildcard namespace. We have to examine all
// the attributes on our content node.... This sort of selector is
// essentially a boolean OR, over all namespaces, of equivalent attr
// selectors with those namespaces. So to evaluate whether it
// matches, evaluate for each namespace (the only namespaces that
// have a chance at matching, of course, are ones that the element
// actually has attributes in), short-circuiting if we ever match.
// Then deal with the localFalse/localTrue stuff.
PRUint32 attrCount = data.mContent->GetAttrCount();
PRInt32 nameSpaceID;
nsCOMPtr<nsIAtom> name;
nsCOMPtr<nsIAtom> prefix;
PRBool attrSelectorMatched = PR_FALSE;
for (PRUint32 i = 0; i < attrCount; ++i) {
#ifdef DEBUG
nsresult attrState =
#endif
data.mContent->GetAttrNameAt(i, &nameSpaceID,
getter_AddRefs(name),
getter_AddRefs(prefix));
NS_ASSERTION(NS_SUCCEEDED(attrState),
"GetAttrCount lied or GetAttrNameAt failed");
if (name != attr->mAttr) {
continue;
}
if (attr->mFunction == NS_ATTR_FUNC_SET) {
attrSelectorMatched = PR_TRUE;
} else {
nsAutoString value;
#ifdef DEBUG
attrState =
#endif
data.mContent->GetAttr(nameSpaceID, name, value);
NS_ASSERTION(NS_SUCCEEDED(attrState) &&
NS_CONTENT_ATTR_NOT_THERE != attrState,
"GetAttrNameAt lied or GetAttr failed");
attrSelectorMatched = AttrMatchesValue(attr, value);
}
// At this point |attrSelectorMatched| has been set by us
// explicitly in this loop. If it's PR_FALSE, we may still match
// -- the content may have another attribute with the same name but
// in a different namespace. But if it's PR_TRUE, we are done (we
// can short-circuit the boolean OR described above).
if (attrSelectorMatched) {
break;
}
}
// Now adjust for a possible negation
result = localTrue == attrSelectorMatched;
}
else 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");
result = localTrue == AttrMatchesValue(attr, value);
}
attr = attr->mNext;
} while (attr && result);
}
}
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 ||
(aAttribute && aAttribute == data.mContent->GetIDAttributeName())) {
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 char* id1Str;
data.mContentID->GetUTF8String(&id1Str);
nsDependentCString id1(id1Str);
do {
const char* id2Str;
IDList->mAtom->GetUTF8String(&id2Str);
nsDependentCString id2(id2Str);
if (localTrue !=
id1.Equals(id2, nsCaseInsensitiveCStringComparator())) {
result = PR_FALSE;
break;
}
IDList = IDList->mNext;
} while (IDList);
}
}
if (result &&
(!aAttribute || aAttribute != data.mStyledContent->GetClassAttributeName())) {
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,
aAttribute, aNegationIndex+1);
}
return result;
}
#undef STATE_CHECK
// Right now, there are four operators:
// PRUnichar(0), the descendent combinator, is greedy
// '~', the indirect adjacent sibling combinator, is greedy
// '+' and '>', the direct adjacent sibling and child combinators, are not
#define NS_IS_GREEDY_OPERATOR(ch) (ch == PRUnichar(0) || ch == PRUnichar('~'))
static PRBool SelectorMatchesTree(RuleProcessorData& aPrevData,
nsCSSSelector* aSelector)
{
nsCSSSelector* selector = aSelector;
RuleProcessorData* prevdata = &aPrevData;
while (selector) { // check compound selectors
// If we don't already have a RuleProcessorData for the next
// appropriate content (whether parent or previous sibling), create
// one.
// for adjacent sibling combinators, the content to test against the
// selector is the previous sibling *element*
RuleProcessorData* data;
if (PRUnichar('+') == selector->mOperator ||
PRUnichar('~') == selector->mOperator) {
data = prevdata->mPreviousSiblingData;
if (!data) {
nsIContent* content = prevdata->mContent;
nsIContent* parent = content->GetParent();
if (parent) {
PRInt32 index = parent->IndexOf(content);
while (0 <= --index) {
content = parent->GetChildAt(index);
if (content->IsContentOfType(nsIContent::eELEMENT)) {
data = new (prevdata->mPresContext)
RuleProcessorData(prevdata->mPresContext, content,
prevdata->mRuleWalker,
&prevdata->mCompatMode);
prevdata->mPreviousSiblingData = data;
break;
}
}
}
}
}
// for descendant combinators and child combinators, the content
// to test against is the parent
else {
data = prevdata->mParentData;
if (!data) {
nsIContent *content = prevdata->mContent->GetParent();
if (content) {
data = new (prevdata->mPresContext)
RuleProcessorData(prevdata->mPresContext, content,
prevdata->mRuleWalker,
&prevdata->mCompatMode);
prevdata->mParentData = data;
}
}
}
if (! data) {
return PR_FALSE;
}
if (SelectorMatches(*data, selector, 0, nsnull, 0)) {
// to avoid greedy matching, we need to recur 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 in that when it recurs
// 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(*data, selector)) {
return PR_TRUE;
}
}
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)) {
return PR_FALSE; // parent was required to match
}
}
prevdata = data;
}
return PR_TRUE; // all the selectors matched.
}
static void ContentEnumFunc(nsICSSStyleRule* aRule, nsCSSSelector* aSelector,
void* aData)
{
ElementRuleProcessorData* data = (ElementRuleProcessorData*)aData;
if (SelectorMatches(*data, aSelector, 0, nsnull, 0)) {
nsCSSSelector *next = aSelector->mNext;
if (!next || SelectorMatchesTree(*data, next)) {
// 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
nsCSSRuleProcessor::RulesMatching(ElementRuleProcessorData *aData)
{
NS_PRECONDITION(aData->mContent->IsContentOfType(nsIContent::eELEMENT),
"content must be element");
RuleCascadeData* cascade = GetRuleCascade(aData->mPresContext);
if (cascade) {
nsIStyledContent* styledContent = aData->mStyledContent;
const nsAttrValue* classes = nsnull;
if (styledContent)
classes = styledContent->GetClasses();
cascade->mRuleHash.EnumerateAllRules(aData->mNameSpaceID,
aData->mContentTag,
aData->mContentID,
classes,
ContentEnumFunc,
aData);
}
return NS_OK;
}
static void PseudoEnumFunc(nsICSSStyleRule* aRule, nsCSSSelector* aSelector,
void* aData)
{
PseudoRuleProcessorData* data = (PseudoRuleProcessorData*)aData;
NS_ASSERTION(aSelector->mTag == data->mPseudoTag, "RuleHash failure");
PRBool matches = PR_TRUE;
if (data->mComparator)
data->mComparator->PseudoMatches(data->mPseudoTag, aSelector, &matches);
if (matches) {
nsCSSSelector *selector = aSelector->mNext;
if (selector) { // test next selector specially
if (PRUnichar('+') == selector->mOperator) {
return; // not valid here, can't match
}
if (SelectorMatches(*data, selector, 0, nsnull, 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
nsCSSRuleProcessor::RulesMatching(PseudoRuleProcessorData* aData)
{
NS_PRECONDITION(!aData->mContent ||
aData->mContent->IsContentOfType(nsIContent::eELEMENT),
"content (if present) must be element");
RuleCascadeData* cascade = GetRuleCascade(aData->mPresContext);
if (cascade) {
cascade->mRuleHash.EnumerateTagRules(aData->mPseudoTag,
PseudoEnumFunc, aData);
}
return NS_OK;
}
inline PRBool
IsSiblingOperator(PRUnichar oper)
{
return oper == PRUnichar('+') || oper == PRUnichar('~');
}
struct StateEnumData {
StateEnumData(StateRuleProcessorData *aData)
: data(aData), change(nsReStyleHint(0)) {}
StateRuleProcessorData *data;
nsReStyleHint change;
};
PR_STATIC_CALLBACK(PRBool) StateEnumFunc(void* aSelector, void* aData)
{
StateEnumData *enumData = NS_STATIC_CAST(StateEnumData*, aData);
StateRuleProcessorData *data = enumData->data;
nsCSSSelector* selector = NS_STATIC_CAST(nsCSSSelector*, aSelector);
if (SelectorMatches(*data, selector, data->mStateMask, nsnull, 0) &&
SelectorMatchesTree(*data, selector->mNext)) {
if (IsSiblingOperator(selector->mOperator))
enumData->change = nsReStyleHint(enumData->change | eReStyle_LaterSiblings);
else
enumData->change = nsReStyleHint(enumData->change | eReStyle_Self);
}
return PR_TRUE;
}
NS_IMETHODIMP
nsCSSRuleProcessor::HasStateDependentStyle(StateRuleProcessorData* aData,
nsReStyleHint* aResult)
{
NS_PRECONDITION(aData->mContent->IsContentOfType(nsIContent::eELEMENT),
"content must be element");
RuleCascadeData* cascade = GetRuleCascade(aData->mPresContext);
// 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|.
StateEnumData data(aData);
if (cascade)
cascade->mStateSelectors.EnumerateForwards(StateEnumFunc, &data);
*aResult = data.change;
return NS_OK;
}
struct AttributeEnumData {
AttributeEnumData(AttributeRuleProcessorData *aData)
: data(aData), change(nsReStyleHint(0)) {}
AttributeRuleProcessorData *data;
nsReStyleHint change;
};
PR_STATIC_CALLBACK(PRBool) AttributeEnumFunc(void* aSelector, void* aData)
{
AttributeEnumData *enumData = NS_STATIC_CAST(AttributeEnumData*, aData);
AttributeRuleProcessorData *data = enumData->data;
nsCSSSelector* selector = NS_STATIC_CAST(nsCSSSelector*, aSelector);
if (SelectorMatches(*data, selector, 0, data->mAttribute, 0) &&
SelectorMatchesTree(*data, selector->mNext)) {
if (IsSiblingOperator(selector->mOperator))
enumData->change = nsReStyleHint(enumData->change | eReStyle_LaterSiblings);
else
enumData->change = nsReStyleHint(enumData->change | eReStyle_Self);
}
return PR_TRUE;
}
NS_IMETHODIMP
nsCSSRuleProcessor::HasAttributeDependentStyle(AttributeRuleProcessorData* aData,
nsReStyleHint* aResult)
{
NS_PRECONDITION(aData->mContent->IsContentOfType(nsIContent::eELEMENT),
"content must be element");
NS_ASSERTION(aData->mStyledContent,
"elements must implement nsIStyledContent");
AttributeEnumData data(aData);
// Since we always have :-moz-any-link (and almost always have :link
// and :visited rules from prefs), rather than hacking AddRule below
// to add |href| to the hash, we'll just handle it here.
if (aData->mAttribute == nsHTMLAtoms::href &&
aData->mIsHTMLContent &&
(aData->mContentTag == nsHTMLAtoms::a ||
aData->mContentTag == nsHTMLAtoms::area ||
aData->mContentTag == nsHTMLAtoms::link)) {
data.change = nsReStyleHint(data.change | eReStyle_Self);
}
// XXX What about XLinks?
RuleCascadeData* cascade = GetRuleCascade(aData->mPresContext);
// We do the same thing for attributes that we do for state selectors
// (see HasStateDependentStyle), except that instead of one big list
// we have a hashtable with a per-attribute list.
if (cascade) {
if (aData->mAttribute == aData->mContent->GetIDAttributeName()) {
cascade->mIDSelectors.EnumerateForwards(AttributeEnumFunc, &data);
}
if (aData->mAttribute == aData->mStyledContent->GetClassAttributeName()) {
cascade->mClassSelectors.EnumerateForwards(AttributeEnumFunc, &data);
}
AttributeSelectorEntry *entry = NS_STATIC_CAST(AttributeSelectorEntry*,
PL_DHashTableOperate(&cascade->mAttributeSelectors, aData->mAttribute,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
entry->mSelectors->EnumerateForwards(AttributeEnumFunc, &data);
}
}
*aResult = data.change;
return NS_OK;
}
nsresult
nsCSSRuleProcessor::ClearRuleCascades()
{
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)
{
for (nsAtomStringList* pseudoClass = aSelector.mPseudoClassList;
pseudoClass; pseudoClass = pseudoClass->mNext) {
if ((pseudoClass->mAtom == nsCSSPseudoClasses::active) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::checked) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::mozDragOver) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::focus) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::hover) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::target) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::link) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::visited) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::enabled) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::disabled) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::required) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::optional) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::valid) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::invalid) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::inRange) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::outOfRange) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::mozReadOnly) ||
(pseudoClass->mAtom == nsCSSPseudoClasses::mozReadWrite)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
PR_STATIC_CALLBACK(PRBool)
AddRule(void* aRuleInfo, void* aCascade)
{
RuleValue* ruleInfo = NS_STATIC_CAST(RuleValue*, aRuleInfo);
RuleCascadeData *cascade = NS_STATIC_CAST(RuleCascadeData*, aCascade);
// Build the rule hash.
cascade->mRuleHash.PrependRule(ruleInfo);
nsVoidArray* stateArray = &cascade->mStateSelectors;
nsVoidArray* classArray = &cascade->mClassSelectors;
nsVoidArray* idArray = &cascade->mIDSelectors;
for (nsCSSSelector* selector = ruleInfo->mSelector;
selector; selector = selector->mNext) {
// It's worth noting that this loop over negations isn't quite
// optimal for two reasons. One, we could add something to one of
// these lists twice, which means we'll check it twice, but I don't
// think that's worth worrying about. (We do the same for multiple
// attribute selectors on the same attribute.) Two, we don't really
// need to check negations past the first in the current
// implementation (and they're rare as well), but that might change
// in the future if :not() is extended.
for (nsCSSSelector* negation = selector; negation;
negation = negation->mNegations) {
// Build mStateSelectors.
if (IsStateSelector(*negation))
stateArray->AppendElement(selector);
// Build mIDSelectors
if (negation->mIDList) {
idArray->AppendElement(selector);
}
// Build mClassSelectors
if (negation->mClassList) {
classArray->AppendElement(selector);
}
// Build mAttributeSelectors.
for (nsAttrSelector *attr = negation->mAttrList; attr;
attr = attr->mNext) {
nsVoidArray *array = cascade->AttributeListFor(attr->mAttr);
if (!array)
return PR_FALSE;
array->AppendElement(selector);
}
}
}
return PR_TRUE;
}
PR_STATIC_CALLBACK(PRIntn)
RuleArraysDestroy(nsHashKey *aKey, void *aData, void *aClosure)
{
delete NS_STATIC_CAST(nsAutoVoidArray*, aData);
return PR_TRUE;
}
struct CascadeEnumData {
CascadeEnumData(nsPresContext* aPresContext, PLArenaPool& aArena)
: mPresContext(aPresContext),
mRuleArrays(nsnull, nsnull, RuleArraysDestroy, nsnull, 64),
mArena(aArena)
{
}
nsPresContext* mPresContext;
nsObjectHashtable mRuleArrays; // of nsAutoVoidArray
PLArenaPool& mArena;
};
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;
for (nsCSSSelectorList *sel = styleRule->Selector();
sel; sel = sel->mNext) {
PRInt32 weight = sel->mWeight;
nsPRUint32Key key(weight);
nsAutoVoidArray *rules =
NS_STATIC_CAST(nsAutoVoidArray*, data->mRuleArrays.Get(&key));
if (!rules) {
rules = new nsAutoVoidArray();
if (!rules) return PR_FALSE; // out of memory
data->mRuleArrays.Put(&key, rules);
}
RuleValue *info =
new (data->mArena) RuleValue(styleRule, sel->mSelectors);
rules->AppendElement(info);
}
}
else if (nsICSSRule::MEDIA_RULE == type ||
nsICSSRule::DOCUMENT_RULE == type) {
nsICSSGroupRule* groupRule = (nsICSSGroupRule*)rule;
if (groupRule->UseForPresentation(data->mPresContext))
groupRule->EnumerateRulesForwards(InsertRuleByWeight, aData);
}
return PR_TRUE;
}
static PRBool
CascadeSheetRulesInto(nsICSSStyleSheet* aSheet, void* aData)
{
nsCSSStyleSheet* sheet = NS_STATIC_CAST(nsCSSStyleSheet*, aSheet);
CascadeEnumData* data = NS_STATIC_CAST(CascadeEnumData*, aData);
PRBool bSheetApplicable = PR_TRUE;
sheet->GetApplicable(bSheetApplicable);
if (bSheetApplicable && sheet->UseForMedium(data->mPresContext)) {
nsCSSStyleSheet* child = sheet->mFirstChild;
while (child) {
CascadeSheetRulesInto(child, data);
child = child->mNext;
}
if (sheet->mInner && sheet->mInner->mOrderedRules) {
sheet->mInner->mOrderedRules->EnumerateForwards(InsertRuleByWeight, data);
}
}
return PR_TRUE;
}
struct RuleArrayData {
PRInt32 mWeight;
nsVoidArray* 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);
nsVoidArray* weightArray = NS_STATIC_CAST(nsVoidArray*, 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(nsObjectHashtable* aRuleArrays,
nsVoidArray* 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*
nsCSSRuleProcessor::GetRuleCascade(nsPresContext* aPresContext)
{
// Having RuleCascadeData objects be per-medium works for now since
// nsCSSRuleProcessor objects are per-document. (For a given set
// of stylesheets they can vary based on medium (@media) or document
// (@-moz-document).) Things will get a little more complicated if
// we implement media queries, though.
RuleCascadeData **cascadep = &mRuleCascades;
RuleCascadeData *cascade;
nsIAtom *medium = aPresContext->Medium();
while ((cascade = *cascadep)) {
if (cascade->mMedium == medium)
return cascade;
cascadep = &cascade->mNext;
}
if (mSheets.Count() != 0) {
cascade = new RuleCascadeData(medium,
eCompatibility_NavQuirks == aPresContext->CompatibilityMode());
if (cascade) {
CascadeEnumData data(aPresContext, cascade->mRuleHash.Arena());
mSheets.EnumerateForwards(CascadeSheetRulesInto, &data);
nsVoidArray weightedRules;
PutRulesInList(&data.mRuleArrays, &weightedRules);
// Put things into the rule hash backwards because it's easier to
// build a singly linked list lowest-first that way.
if (!weightedRules.EnumerateBackwards(AddRule, cascade)) {
delete cascade;
cascade = nsnull;
}
*cascadep = cascade;
}
}
return cascade;
}
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