pjs/layout/style/nsStyleSet.cpp

861 строка
30 KiB
C++
Исходник Обычный вид История

1998-04-14 00:24:54 +04:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsCOMPtr.h"
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#include "nsIStyleSet.h"
#include "nsIStyleSheet.h"
#include "nsIStyleRule.h"
#include "nsIStyleContext.h"
#include "nsISupportsArray.h"
#include "nsIFrame.h"
//#include "nsHashtable.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIStyleFrameConstruction.h"
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#include "nsLayoutAtoms.h"
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// XXX Temporary fix to make sure that ua.css only gets applied
// to HTML content. When this removed, remember to get rid of
// the include dependency in the makefile.
#include "nsIHTMLContent.h"
static NS_DEFINE_IID(kIHTMLContentIID, NS_IHTMLCONTENT_IID);
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static NS_DEFINE_IID(kIStyleSetIID, NS_ISTYLE_SET_IID);
static NS_DEFINE_IID(kIStyleFrameConstructionIID, NS_ISTYLE_FRAME_CONSTRUCTION_IID);
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class StyleSetImpl : public nsIStyleSet {
public:
StyleSetImpl();
NS_DECL_ISUPPORTS
virtual void AppendOverrideStyleSheet(nsIStyleSheet* aSheet);
virtual void InsertOverrideStyleSheetAfter(nsIStyleSheet* aSheet,
nsIStyleSheet* aAfterSheet);
virtual void InsertOverrideStyleSheetBefore(nsIStyleSheet* aSheet,
nsIStyleSheet* aBeforeSheet);
virtual void RemoveOverrideStyleSheet(nsIStyleSheet* aSheet);
virtual PRInt32 GetNumberOfOverrideStyleSheets();
virtual nsIStyleSheet* GetOverrideStyleSheetAt(PRInt32 aIndex);
virtual void AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument);
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virtual void RemoveDocStyleSheet(nsIStyleSheet* aSheet);
virtual PRInt32 GetNumberOfDocStyleSheets();
virtual nsIStyleSheet* GetDocStyleSheetAt(PRInt32 aIndex);
virtual void AppendBackstopStyleSheet(nsIStyleSheet* aSheet);
virtual void InsertBackstopStyleSheetAfter(nsIStyleSheet* aSheet,
nsIStyleSheet* aAfterSheet);
virtual void InsertBackstopStyleSheetBefore(nsIStyleSheet* aSheet,
nsIStyleSheet* aBeforeSheet);
virtual void RemoveBackstopStyleSheet(nsIStyleSheet* aSheet);
virtual PRInt32 GetNumberOfBackstopStyleSheets();
virtual nsIStyleSheet* GetBackstopStyleSheetAt(PRInt32 aIndex);
virtual nsIStyleContext* ResolveStyleFor(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aParentContext,
PRBool aForceUnique = PR_FALSE);
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virtual nsIStyleContext* ResolvePseudoStyleFor(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
PRBool aForceUnique = PR_FALSE);
virtual nsIStyleContext* ProbePseudoStyleFor(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
PRBool aForceUnique = PR_FALSE);
NS_IMETHOD ConstructRootFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame*& aFrameSubTree);
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NS_IMETHOD ReconstructFrames(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
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nsIFrame* aFrameSubTree);
NS_IMETHOD ContentAppended(nsIPresContext* aPresContext,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer);
NS_IMETHOD ContentInserted(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer);
NS_IMETHOD ContentReplaced(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer);
NS_IMETHOD ContentRemoved(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer);
NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
nsIContent* aContent,
nsISupports* aSubContent);
NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsIAtom* aAttribute,
PRInt32 aHint); // See nsStyleConsts fot hint values
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// xxx style rules enumeration
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// Style change notifications
NS_IMETHOD StyleRuleChanged(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint); // See nsStyleConsts fot hint values
NS_IMETHOD StyleRuleAdded(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
NS_IMETHOD StyleRuleRemoved(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
// Notification that we were unable to render a replaced element.
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame);
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virtual void List(FILE* out = stdout, PRInt32 aIndent = 0);
private:
// These are not supported and are not implemented!
StyleSetImpl(const StyleSetImpl& aCopy);
StyleSetImpl& operator=(const StyleSetImpl& aCopy);
protected:
virtual ~StyleSetImpl();
PRBool EnsureArray(nsISupportsArray** aArray);
nsIStyleContext* GetContext(nsIPresContext* aPresContext, nsIStyleContext* aParentContext,
nsIAtom* aPseudoTag, nsISupportsArray* aRules, PRBool aForceUnique,
PRBool& aUsedRules);
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PRInt32 RulesMatching(nsISupportsArray* aSheets,
nsIPresContext* aPresContext,
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nsIAtom* aMedium,
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nsIContent* aContent,
nsIStyleContext* aParentContext,
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nsISupportsArray* aResults);
PRInt32 RulesMatching(nsISupportsArray* aSheets,
nsIPresContext* aPresContext,
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nsIAtom* aMedium,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults);
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void List(FILE* out, PRInt32 aIndent, nsISupportsArray* aSheets);
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void ListContexts(nsIStyleContext* aRootContext, FILE* out, PRInt32 aIndent);
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nsISupportsArray* mOverrideSheets;
nsISupportsArray* mDocSheets;
nsISupportsArray* mBackstopSheets;
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nsISupportsArray* mRecycler;
nsIStyleFrameConstruction* mFrameConstructor;
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};
StyleSetImpl::StyleSetImpl()
: mOverrideSheets(nsnull),
mDocSheets(nsnull),
mBackstopSheets(nsnull),
mRecycler(nsnull),
mFrameConstructor(nsnull)
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{
NS_INIT_REFCNT();
}
StyleSetImpl::~StyleSetImpl()
{
NS_IF_RELEASE(mOverrideSheets);
NS_IF_RELEASE(mDocSheets);
NS_IF_RELEASE(mBackstopSheets);
NS_IF_RELEASE(mFrameConstructor);
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NS_IF_RELEASE(mRecycler);
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}
NS_IMPL_ISUPPORTS(StyleSetImpl, kIStyleSetIID)
PRBool StyleSetImpl::EnsureArray(nsISupportsArray** aArray)
{
if (nsnull == *aArray) {
if (NS_OK != NS_NewISupportsArray(aArray)) {
return PR_FALSE;
}
}
return PR_TRUE;
}
// ----- Override sheets
void StyleSetImpl::AppendOverrideStyleSheet(nsIStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (EnsureArray(&mOverrideSheets)) {
mOverrideSheets->RemoveElement(aSheet);
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mOverrideSheets->AppendElement(aSheet);
}
}
void StyleSetImpl::InsertOverrideStyleSheetAfter(nsIStyleSheet* aSheet,
nsIStyleSheet* aAfterSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (EnsureArray(&mOverrideSheets)) {
mOverrideSheets->RemoveElement(aSheet);
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PRInt32 index = mOverrideSheets->IndexOf(aAfterSheet);
mOverrideSheets->InsertElementAt(aSheet, ++index);
}
}
void StyleSetImpl::InsertOverrideStyleSheetBefore(nsIStyleSheet* aSheet,
nsIStyleSheet* aBeforeSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (EnsureArray(&mOverrideSheets)) {
mOverrideSheets->RemoveElement(aSheet);
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PRInt32 index = mOverrideSheets->IndexOf(aBeforeSheet);
mOverrideSheets->InsertElementAt(aSheet, ((-1 < index) ? index : 0));
}
}
void StyleSetImpl::RemoveOverrideStyleSheet(nsIStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (nsnull != mOverrideSheets) {
mOverrideSheets->RemoveElement(aSheet);
}
}
PRInt32 StyleSetImpl::GetNumberOfOverrideStyleSheets()
{
if (nsnull != mOverrideSheets) {
return mOverrideSheets->Count();
}
return 0;
}
nsIStyleSheet* StyleSetImpl::GetOverrideStyleSheetAt(PRInt32 aIndex)
{
nsIStyleSheet* sheet = nsnull;
if (nsnull == mOverrideSheets) {
sheet = (nsIStyleSheet*)mOverrideSheets->ElementAt(aIndex);
}
return sheet;
}
// -------- Doc Sheets
void StyleSetImpl::AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument)
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{
NS_PRECONDITION((nsnull != aSheet) && (nsnull != aDocument), "null arg");
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if (EnsureArray(&mDocSheets)) {
mDocSheets->RemoveElement(aSheet);
// lowest index last
PRInt32 newDocIndex = aDocument->GetIndexOfStyleSheet(aSheet);
PRInt32 count = mDocSheets->Count();
PRInt32 index;
for (index = 0; index < count; index++) {
nsIStyleSheet* sheet = (nsIStyleSheet*)mDocSheets->ElementAt(index);
PRInt32 sheetDocIndex = aDocument->GetIndexOfStyleSheet(sheet);
if (sheetDocIndex < newDocIndex) {
mDocSheets->InsertElementAt(aSheet, index);
index = count; // break loop
}
NS_RELEASE(sheet);
}
if (mDocSheets->Count() == count) { // didn't insert it
mDocSheets->AppendElement(aSheet);
}
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if (nsnull == mFrameConstructor) {
aSheet->QueryInterface(kIStyleFrameConstructionIID, (void **)&mFrameConstructor);
}
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}
}
void StyleSetImpl::RemoveDocStyleSheet(nsIStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (nsnull != mDocSheets) {
mDocSheets->RemoveElement(aSheet);
}
}
PRInt32 StyleSetImpl::GetNumberOfDocStyleSheets()
{
if (nsnull != mDocSheets) {
return mDocSheets->Count();
}
return 0;
}
nsIStyleSheet* StyleSetImpl::GetDocStyleSheetAt(PRInt32 aIndex)
{
nsIStyleSheet* sheet = nsnull;
if (nsnull != mDocSheets) {
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sheet = (nsIStyleSheet*)mDocSheets->ElementAt(aIndex);
}
return sheet;
}
// ------ backstop sheets
void StyleSetImpl::AppendBackstopStyleSheet(nsIStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (EnsureArray(&mBackstopSheets)) {
mBackstopSheets->RemoveElement(aSheet);
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mBackstopSheets->AppendElement(aSheet);
}
}
void StyleSetImpl::InsertBackstopStyleSheetAfter(nsIStyleSheet* aSheet,
nsIStyleSheet* aAfterSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (EnsureArray(&mBackstopSheets)) {
mBackstopSheets->RemoveElement(aSheet);
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PRInt32 index = mBackstopSheets->IndexOf(aAfterSheet);
mBackstopSheets->InsertElementAt(aSheet, ++index);
}
}
void StyleSetImpl::InsertBackstopStyleSheetBefore(nsIStyleSheet* aSheet,
nsIStyleSheet* aBeforeSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (EnsureArray(&mBackstopSheets)) {
mBackstopSheets->RemoveElement(aSheet);
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PRInt32 index = mBackstopSheets->IndexOf(aBeforeSheet);
mBackstopSheets->InsertElementAt(aSheet, ((-1 < index) ? index : 0));
}
}
void StyleSetImpl::RemoveBackstopStyleSheet(nsIStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (nsnull != mBackstopSheets) {
mBackstopSheets->RemoveElement(aSheet);
}
}
PRInt32 StyleSetImpl::GetNumberOfBackstopStyleSheets()
{
if (nsnull != mBackstopSheets) {
return mBackstopSheets->Count();
}
return 0;
}
nsIStyleSheet* StyleSetImpl::GetBackstopStyleSheetAt(PRInt32 aIndex)
{
nsIStyleSheet* sheet = nsnull;
if (nsnull == mBackstopSheets) {
sheet = (nsIStyleSheet*)mBackstopSheets->ElementAt(aIndex);
}
return sheet;
}
PRInt32 StyleSetImpl::RulesMatching(nsISupportsArray* aSheets,
nsIPresContext* aPresContext,
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nsIAtom* aMedium,
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nsIContent* aContent,
nsIStyleContext* aParentContext,
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nsISupportsArray* aResults)
{
PRInt32 ruleCount = 0;
if (nsnull != aSheets) {
PRInt32 index = aSheets->Count();
while (0 < index--) {
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nsIStyleSheet* sheet = (nsIStyleSheet*)aSheets->ElementAt(index);
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PRBool mediumOK = PR_FALSE;
PRInt32 mediumCount;
sheet->GetMediumCount(mediumCount);
if (0 < mediumCount) {
PRInt32 index = 0;
nsIAtom* medium;
while ((PR_FALSE == mediumOK) && (index < mediumCount)) {
sheet->GetMediumAt(index++, medium);
if ((medium == nsLayoutAtoms::all) || (medium == aMedium)) {
mediumOK = PR_TRUE;
}
NS_RELEASE(medium);
}
}
else {
mediumOK = PR_TRUE;
}
if (mediumOK) {
ruleCount += sheet->RulesMatching(aPresContext, aContent, aParentContext,
aResults);
}
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NS_RELEASE(sheet);
}
}
return ruleCount;
}
nsIStyleContext* StyleSetImpl::GetContext(nsIPresContext* aPresContext,
nsIStyleContext* aParentContext, nsIAtom* aPseudoTag,
nsISupportsArray* aRules,
PRBool aForceUnique, PRBool& aUsedRules)
{
nsIStyleContext* result = nsnull;
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aUsedRules = PR_FALSE;
if ((PR_FALSE == aForceUnique) &&
(nsnull != aParentContext) && (nsnull == aRules) &&
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(0 == aParentContext->GetStyleRuleCount())) {
nsIAtom* parentTag = nsnull;
aParentContext->GetPseudoType(parentTag);
if (parentTag == aPseudoTag) {
// this and parent are empty, and compatible
result = aParentContext;
NS_ADDREF(result); // add ref for the caller
}
NS_IF_RELEASE(parentTag);
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//fprintf(stdout, ".");
}
if (nsnull == result) {
if ((PR_FALSE == aForceUnique) && (nsnull != aParentContext)) {
aParentContext->FindChildWithRules(aPseudoTag, aRules, result);
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}
if (nsnull == result) {
if (NS_OK == NS_NewStyleContext(&result, aParentContext, aPseudoTag, aRules, aPresContext)) {
if (PR_TRUE == aForceUnique) {
result->ForceUnique();
}
aUsedRules = PRBool(nsnull != aRules);
}
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//fprintf(stdout, "+");
}
else {
//fprintf(stdout, "-");
}
}
return result;
}
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// XXX for now only works for strength 0 & 1
static void SortRulesByStrength(nsISupportsArray* aRules, PRInt32& aBackstopRuleCount)
{
PRInt32 count = aRules->Count();
if (1 < count) {
PRInt32 index;
PRInt32 strength;
for (index = 0; index < count; ) {
nsIStyleRule* rule = (nsIStyleRule*)aRules->ElementAt(index);
rule->GetStrength(strength);
if (0 < strength) {
aRules->RemoveElementAt(index);
aRules->AppendElement(rule);
count--;
if (index < aBackstopRuleCount) {
aBackstopRuleCount--;
}
}
else {
index++;
}
NS_RELEASE(rule);
}
}
}
#ifdef NS_DEBUG
#define NS_ASSERT_REFCOUNT(ptr,cnt,msg) { \
nsrefcnt count = ptr->AddRef(); \
ptr->Release(); \
NS_ASSERTION(--count == cnt, msg); \
}
#else
#define NS_ASSERT_REFCOUNT(ptr,cnt,msg) {}
#endif
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nsIStyleContext* StyleSetImpl::ResolveStyleFor(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aParentContext,
PRBool aForceUnique)
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{
nsIStyleContext* result = nsnull;
// want to check parent frame's context for cached child context first
if ((nsnull != aParentContext) && (nsnull != aContent)) {
//XXX Disabled this for the dom, as per peter's note
//XXX result = aParentContext->FindChildWithContent(aContent);
}
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if (nsnull == result) {
// then do a brute force rule search
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nsISupportsArray* rules = mRecycler;
mRecycler = nsnull;
if (nsnull == rules) {
NS_NewISupportsArray(&rules);
}
if (nsnull != rules) {
nsCOMPtr<nsIAtom> medium;
aPresContext->GetMedium(getter_AddRefs(medium));
// XXX Stop-gap fix to prevent ua.css rules from being applied
// to XML elements
nsIHTMLContent *htmlContent;
nsresult rv = aContent->QueryInterface(kIHTMLContentIID, (void **)&htmlContent);
PRInt32 ruleCount = 0;
if (NS_SUCCEEDED(rv)) {
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ruleCount += RulesMatching(mBackstopSheets, aPresContext, medium, aContent, aParentContext, rules);
NS_RELEASE(htmlContent);
}
PRInt32 backstopRules = ruleCount;
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ruleCount += RulesMatching(mDocSheets, aPresContext, medium, aContent, aParentContext, rules);
ruleCount += RulesMatching(mOverrideSheets, aPresContext, medium, aContent, aParentContext, rules);
PRBool usedRules = PR_FALSE;
if (0 < ruleCount) {
SortRulesByStrength(rules, backstopRules);
result = GetContext(aPresContext, aParentContext, nsnull, rules, aForceUnique, usedRules);
if (usedRules) {
NS_ASSERT_REFCOUNT(rules, 2, "rules array was used elsewhere");
NS_RELEASE(rules);
}
else {
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
rules->Clear();
mRecycler = rules;
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}
}
else {
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
mRecycler = rules;
result = GetContext(aPresContext, aParentContext, nsnull, nsnull, aForceUnique, usedRules);
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}
}
}
return result;
}
PRInt32 StyleSetImpl::RulesMatching(nsISupportsArray* aSheets,
nsIPresContext* aPresContext,
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nsIAtom* aMedium,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
nsISupportsArray* aResults)
{
PRInt32 ruleCount = 0;
if (nsnull != aSheets) {
PRInt32 index = aSheets->Count();
while (0 < index--) {
nsIStyleSheet* sheet = (nsIStyleSheet*)aSheets->ElementAt(index);
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PRBool mediumOK = PR_FALSE;
PRInt32 mediumCount;
sheet->GetMediumCount(mediumCount);
if (0 < mediumCount) {
PRInt32 index = 0;
nsIAtom* medium;
while ((PR_FALSE == mediumOK) && (index < mediumCount)) {
sheet->GetMediumAt(index++, medium);
if ((medium == nsLayoutAtoms::all) || (medium == aMedium)) {
mediumOK = PR_TRUE;
}
NS_RELEASE(medium);
}
}
else {
mediumOK = PR_TRUE;
}
if (mediumOK) {
ruleCount += sheet->RulesMatching(aPresContext, aParentContent, aPseudoTag,
aParentContext, aResults);
}
NS_RELEASE(sheet);
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}
}
return ruleCount;
}
nsIStyleContext* StyleSetImpl::ResolvePseudoStyleFor(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
PRBool aForceUnique)
{
nsIStyleContext* result = nsnull;
// want to check parent frame's context for cached child context first
// then do a brute force rule search
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nsISupportsArray* rules = mRecycler;
mRecycler = nsnull;
if (nsnull == rules) {
NS_NewISupportsArray(&rules);
}
if (nsnull != rules) {
nsCOMPtr<nsIAtom> medium;
aPresContext->GetMedium(getter_AddRefs(medium));
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PRInt32 ruleCount = RulesMatching(mBackstopSheets, aPresContext, medium,
aParentContent, aPseudoTag,
aParentContext, rules);
PRInt32 backstopRules = ruleCount;
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ruleCount += RulesMatching(mDocSheets, aPresContext, medium,
aParentContent, aPseudoTag,
aParentContext, rules);
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ruleCount += RulesMatching(mOverrideSheets, aPresContext, medium,
aParentContent, aPseudoTag,
aParentContext, rules);
PRBool usedRules = PR_FALSE;
if (0 < ruleCount) {
SortRulesByStrength(rules, backstopRules);
result = GetContext(aPresContext, aParentContext, aPseudoTag, rules, aForceUnique, usedRules);
if (usedRules) {
NS_ASSERT_REFCOUNT(rules, 2, "rules array was used elsewhere");
NS_RELEASE(rules);
}
else {
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
rules->Clear();
mRecycler = rules;
}
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}
else {
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
mRecycler = rules;
result = GetContext(aPresContext, aParentContext, aPseudoTag, nsnull, aForceUnique, usedRules);
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}
}
return result;
}
nsIStyleContext* StyleSetImpl::ProbePseudoStyleFor(nsIPresContext* aPresContext,
nsIContent* aParentContent,
nsIAtom* aPseudoTag,
nsIStyleContext* aParentContext,
PRBool aForceUnique)
{
nsIStyleContext* result = nsnull;
// want to check parent frame's context for cached child context first
// then do a brute force rule search
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nsISupportsArray* rules = mRecycler;
mRecycler = nsnull;
if (nsnull == rules) {
NS_NewISupportsArray(&rules);
}
if (nsnull != rules) {
nsCOMPtr<nsIAtom> medium;
aPresContext->GetMedium(getter_AddRefs(medium));
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PRInt32 ruleCount = RulesMatching(mBackstopSheets, aPresContext, medium,
aParentContent, aPseudoTag,
aParentContext, rules);
PRInt32 backstopRules = ruleCount;
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ruleCount += RulesMatching(mDocSheets, aPresContext, medium,
aParentContent, aPseudoTag,
aParentContext, rules);
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ruleCount += RulesMatching(mOverrideSheets, aPresContext, medium,
aParentContent, aPseudoTag,
aParentContext, rules);
PRBool usedRules = PR_FALSE;
if (0 < ruleCount) {
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SortRulesByStrength(rules, backstopRules);
result = GetContext(aPresContext, aParentContext, aPseudoTag, rules, aForceUnique, usedRules);
if (usedRules) {
NS_ASSERT_REFCOUNT(rules, 2, "rules array was used elsewhere");
NS_RELEASE(rules);
}
else {
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
rules->Clear();
mRecycler = rules;
}
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}
else {
NS_ASSERT_REFCOUNT(rules, 1, "rules array was used elsewhere");
mRecycler = rules;
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}
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}
return result;
}
NS_IMETHODIMP StyleSetImpl::ConstructRootFrame(nsIPresContext* aPresContext,
nsIContent* aDocElement,
nsIFrame*& aFrameSubTree)
{
return mFrameConstructor->ConstructRootFrame(aPresContext, aDocElement,
aFrameSubTree);
}
NS_IMETHODIMP
StyleSetImpl::ReconstructFrames(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIFrame* aFrameSubTree)
{
return mFrameConstructor->ReconstructFrames(aPresContext, aContent,
aParentFrame, aFrameSubTree);
}
NS_IMETHODIMP StyleSetImpl::ContentAppended(nsIPresContext* aPresContext,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
return mFrameConstructor->ContentAppended(aPresContext,
aContainer, aNewIndexInContainer);
}
NS_IMETHODIMP StyleSetImpl::ContentInserted(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
return mFrameConstructor->ContentInserted(aPresContext, aContainer,
aChild, aIndexInContainer);
}
NS_IMETHODIMP StyleSetImpl::ContentReplaced(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer)
{
return mFrameConstructor->ContentReplaced(aPresContext, aContainer,
aOldChild, aNewChild, aIndexInContainer);
}
NS_IMETHODIMP StyleSetImpl::ContentRemoved(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
return mFrameConstructor->ContentRemoved(aPresContext, aContainer,
aChild, aIndexInContainer);
}
NS_IMETHODIMP
StyleSetImpl::ContentChanged(nsIPresContext* aPresContext,
nsIContent* aContent,
nsISupports* aSubContent)
{
return mFrameConstructor->ContentChanged(aPresContext,
aContent, aSubContent);
}
NS_IMETHODIMP
StyleSetImpl::AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIAtom* aAttribute,
PRInt32 aHint)
{
return mFrameConstructor->AttributeChanged(aPresContext, aContent,
aAttribute, aHint);
}
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// Style change notifications
NS_IMETHODIMP
StyleSetImpl::StyleRuleChanged(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint)
{
return mFrameConstructor->StyleRuleChanged(aPresContext, aStyleSheet, aStyleRule, aHint);
}
NS_IMETHODIMP
StyleSetImpl::StyleRuleAdded(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
return mFrameConstructor->StyleRuleAdded(aPresContext, aStyleSheet, aStyleRule);
}
NS_IMETHODIMP
StyleSetImpl::StyleRuleRemoved(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
return mFrameConstructor->StyleRuleRemoved(aPresContext, aStyleSheet, aStyleRule);
}
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NS_IMETHODIMP
StyleSetImpl::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
return mFrameConstructor->CantRenderReplacedElement(aPresContext, aFrame);
}
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void StyleSetImpl::List(FILE* out, PRInt32 aIndent, nsISupportsArray* aSheets)
{
PRInt32 count = ((nsnull != aSheets) ? aSheets->Count() : 0);
for (PRInt32 index = 0; index < count; index++) {
nsIStyleSheet* sheet = (nsIStyleSheet*)aSheets->ElementAt(index);
sheet->List(out, aIndent);
fputs("\n", out);
NS_RELEASE(sheet);
}
}
void StyleSetImpl::List(FILE* out, PRInt32 aIndent)
{
List(out, aIndent, mOverrideSheets);
List(out, aIndent, mDocSheets);
List(out, aIndent, mBackstopSheets);
}
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void StyleSetImpl::ListContexts(nsIStyleContext* aRootContext, FILE* out, PRInt32 aIndent)
{
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aRootContext->List(out, aIndent);
}
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NS_LAYOUT nsresult
NS_NewStyleSet(nsIStyleSet** aInstancePtrResult)
{
if (aInstancePtrResult == nsnull) {
return NS_ERROR_NULL_POINTER;
}
StyleSetImpl *it = new StyleSetImpl();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(kIStyleSetIID, (void **) aInstancePtrResult);
}