Bommels05/Mozilla
Bommels05/Mozilla
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Mozilla/mozilla/layout/style/nsCSSStyleSheet.cpp
bzbarsky%mit.edu dfe3e9b0bc Improve the CSSLoader API: make it clear which methods return results 
sync and which return async, move the handling of alternates more completely
into the CSSLoader, make it possible for observers to tell whether the load
actually succeeded.  Bug 293825, r+sr=peterv


git-svn-id: svn://10.0.0.236/trunk@180035 18797224-902f-48f8-a5cc-f745e15eee43
2005-09-12 18:41:15 +00:00

3914 lines
115 KiB
C++
Raw Blame History

/* -*- 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 "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),
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(),
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(),
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(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)
{
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->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->mDocument = 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)
{
nsCAutoString str;
// XXXldb The DOM spec says that this should be null for inline style sheets.
if (mInner && mInner->mSheetURI) {
mInner->mSheetURI->GetSpec(str);
}
CopyUTF8toUTF16(str, 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::SecurityManager()->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 aWasAlternate,
nsresult aStatus)
{
#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 && NS_SUCCEEDED(aStatus)) {
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);
if (mPreviousSiblingData)
mPreviousSiblingData->Destroy(mPresContext);
if (mParentData)
mParentData->Destroy(mPresContext);
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 {
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)) {
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;
}
Reference in New Issue View Git Blame Copy Permalink