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gecko-dev/layout/style/nsCSSStyleSheet.cpp
bzbarsky%mit.edu 867068ef8a Implement the proposed Web Apps 1.0 API for changing the selected style sheet 
set, querying the available sets, etc.  Bug 200930, r=sicking, sr=dbaron
2007-01-11 19:32:31 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:tabstop=2:expandtab:shiftwidth=2:
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* L. David Baron <dbaron@dbaron.org>
* 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 ***** */
/* representation of a CSS style sheet */
#include "nsCSSStyleSheet.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIServiceManager.h"
#include "nsCSSRuleProcessor.h"
#include "nsICSSStyleRule.h"
#include "nsICSSNameSpaceRule.h"
#include "nsICSSGroupRule.h"
#include "nsICSSImportRule.h"
#include "nsIMediaList.h"
#include "nsIDocument.h"
#include "nsPresContext.h"
#include "nsLayoutAtoms.h"
#include "nsString.h"
#include "nsVoidArray.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 "nsICSSParser.h"
#include "nsICSSLoader.h"
#include "nsICSSLoaderObserver.h"
#include "nsINameSpaceManager.h"
#include "nsXMLNameSpaceMap.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsIJSContextStack.h"
#include "nsIScriptSecurityManager.h"
// -------------------------------
// 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(nsGkAtoms::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(nsICSSRule* aRule, void* aSheet)
{
if (aRule) {
aRule->SetStyleSheet((nsICSSStyleSheet*)aSheet);
}
return PR_TRUE;
}
nsCSSStyleSheetInner::nsCSSStyleSheetInner(nsICSSStyleSheet* aParentSheet)
: mSheets(),
mComplete(PR_FALSE)
{
MOZ_COUNT_CTOR(nsCSSStyleSheetInner);
mSheets.AppendElement(aParentSheet);
}
static PRBool
CloneRuleInto(nsICSSRule* aRule, void* aArray)
{
nsICSSRule* clone = nsnull;
aRule->Clone(clone);
if (clone) {
NS_STATIC_CAST(nsCOMArray<nsICSSRule>*, aArray)->AppendObject(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);
aCopy.mOrderedRules.EnumerateForwards(CloneRuleInto, &mOrderedRules);
mOrderedRules.EnumerateForwards(SetStyleSheetReference, aParentSheet);
RebuildNameSpaces();
}
nsCSSStyleSheetInner::~nsCSSStyleSheetInner()
{
MOZ_COUNT_DTOR(nsCSSStyleSheetInner);
mOrderedRules.EnumerateForwards(SetStyleSheetReference, nsnull);
}
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");
mOrderedRules.EnumerateForwards(SetStyleSheetReference,
(nsICSSStyleSheet*)mSheets.ElementAt(0));
}
else {
mSheets.RemoveElement(aParentSheet);
}
}
static PRBool
CreateNameSpace(nsICSSRule* aRule, void* aNameSpacePtr)
{
PRInt32 type = nsICSSRule::UNKNOWN_RULE;
aRule->GetType(type);
if (nsICSSRule::NAMESPACE_RULE == type) {
nsICSSNameSpaceRule* nameSpaceRule = (nsICSSNameSpaceRule*)aRule;
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
}
}
mOrderedRules.EnumerateForwards(CreateNameSpace, mNameSpaceMap);
}
// -------------------------------
// CSS Style Sheet
//
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, "destructing 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.Count() == 0 && !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)
{
// Internal method, so callers must handle BeginUpdate/EndUpdate
PRBool oldDisabled = mDisabled;
mDisabled = !aEnabled;
if (mDocument && mInner && mInner->mComplete && oldDisabled != mDisabled) {
ClearRuleCascades();
mDocument->SetStyleSheetApplicableState(this, !mDisabled);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetComplete(PRBool& aComplete) const
{
aComplete = mInner && mInner->mComplete;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetComplete()
{
if (!mInner)
return NS_ERROR_UNEXPECTED;
NS_ASSERTION(!mDirty, "Can't set a dirty sheet complete!");
mInner->mComplete = PR_TRUE;
if (mDocument && !mDisabled) {
// Let the document know
mDocument->BeginUpdate(UPDATE_STYLE);
mDocument->SetStyleSheetApplicableState(this, PR_TRUE);
mDocument->EndUpdate(UPDATE_STYLE);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetParentSheet(nsIStyleSheet*& aParent) const
{
aParent = mParent;
NS_IF_ADDREF(aParent);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetOwningDocument(nsIDocument*& aDocument) const
{
aDocument = mDocument;
NS_IF_ADDREF(aDocument);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetOwningDocument(nsIDocument* aDocument)
{ // not ref counted
mDocument = aDocument;
// Now set the same document on all our child sheets....
for (nsCSSStyleSheet* child = mFirstChild; child; child = child->mNext) {
child->SetOwningDocument(aDocument);
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetOwningNode(nsIDOMNode* aOwningNode)
{ // not ref counted
mOwningNode = aOwningNode;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::SetOwnerRule(nsICSSImportRule* aOwnerRule)
{ // not ref counted
mOwnerRule = aOwnerRule;
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::GetOwnerRule(nsICSSImportRule** aOwnerRule)
{
*aOwnerRule = mOwnerRule;
NS_IF_ADDREF(*aOwnerRule);
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::ContainsStyleSheet(nsIURI* aURL, PRBool& aContains, nsIStyleSheet** aTheChild /*=nsnull*/)
{
NS_PRECONDITION(nsnull != aURL, "null arg");
if (!mInner || !mInner->mSheetURI) {
// We're not yet far enough along in our load to know what our URL is (we
// may still get redirected and such). Assert (caller should really not be
// calling this on us at this stage) and return.
NS_ERROR("ContainsStyleSheet called on a sheet that's still loading");
aContains = PR_FALSE;
return NS_OK;
}
// first check ourself out
nsresult rv = mInner->mSheetURI->Equals(aURL, &aContains);
if (NS_FAILED(rv)) aContains = PR_FALSE;
if (aContains) {
// if we found it and the out-param is there, set it and addref
if (aTheChild) {
rv = QueryInterface( NS_GET_IID(nsIStyleSheet), (void **)aTheChild);
}
} else {
nsCSSStyleSheet* child = mFirstChild;
// now check the chil'ins out (recursively)
while ((PR_FALSE == aContains) && (nsnull != child)) {
child->ContainsStyleSheet(aURL, aContains, aTheChild);
if (aContains) {
break;
} else {
child = child->mNext;
}
}
}
// NOTE: if there are errors in the above we are handling them locally
// and not promoting them to the caller
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::AppendStyleSheet(nsICSSStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
if (NS_SUCCEEDED(WillDirty())) {
NS_ADDREF(aSheet);
nsCSSStyleSheet* sheet = (nsCSSStyleSheet*)aSheet;
if (! mFirstChild) {
mFirstChild = sheet;
}
else {
nsCSSStyleSheet* child = mFirstChild;
while (child->mNext) {
child = child->mNext;
}
child->mNext = sheet;
}
// This is not reference counted. Our parent tells us when
// it's going away.
sheet->mParent = this;
sheet->mDocument = mDocument;
DidDirty();
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSStyleSheet::InsertStyleSheetAt(nsICSSStyleSheet* aSheet, PRInt32 aIndex)
{
NS_PRECONDITION(nsnull != aSheet, "null arg");
nsresult result = WillDirty();
if (NS_SUCCEEDED(result)) {
NS_ADDREF(aSheet);
nsCSSStyleSheet* sheet = (nsCSSStyleSheet*)aSheet;
nsCSSStyleSheet* child = mFirstChild;
if (aIndex && child) {
while ((0 < --aIndex) && child->mNext) {
child = child->mNext;
}
sheet->mNext = child->mNext;
child->mNext = sheet;
}
else {
sheet->mNext = mFirstChild;
mFirstChild = sheet;
}
// This is not reference counted. Our parent tells us when
// it's going away.
sheet->mParent = this;
sheet->mDocument = mDocument;
DidDirty();
}
return result;
}
NS_IMETHODIMP
nsCSSStyleSheet::PrependStyleRule(nsICSSRule* aRule)
{
NS_PRECONDITION(nsnull != aRule, "null arg");
if (NS_SUCCEEDED(WillDirty())) {
mInner->mOrderedRules.InsertObjectAt(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())) {
mInner->mOrderedRules.AppendObject(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.Count() != 0, "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.ReplaceObjectAt(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) {
aCount = mInner->mOrderedRules.Count();
}
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) {
NS_IF_ADDREF(aRule = mInner->mOrderedRules.SafeObjectAt(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(const nsCOMArray<nsICSSRule>& aRules, FILE* aOut, PRInt32 aIndent)
{
for (PRInt32 index = aRules.Count() - 1; index >= 0; --index) {
aRules.ObjectAt(index)->List(aOut, aIndent);
}
}
struct ListEnumData {
ListEnumData(FILE* aOut, PRInt32 aIndent)
: mOut(aOut),
mIndent(aIndent)
{
}
FILE* mOut;
PRInt32 mIndent;
};
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)
{
// DOM method, so handle BeginUpdate/EndUpdate
MOZ_AUTO_DOC_UPDATE(mDocument, UPDATE_STYLE, PR_TRUE);
nsresult rv = nsCSSStyleSheet::SetEnabled(!aDisabled);
return rv;
}
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
nsIScriptSecurityManager *securityManager =
nsContentUtils::GetSecurityManager();
rv = 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 (aIndex > PRUint32(mInner->mOrderedRules.Count()))
return NS_ERROR_DOM_INDEX_SIZE_ERR;
NS_ASSERTION(PRUint32(mInner->mOrderedRules.Count()) <= PR_INT32_MAX,
"Too many style rules!");
// 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);
nsCOMArray<nsICSSRule> rules;
result = css->ParseRule(aRule, mInner->mSheetURI, mInner->mBaseURI, rules);
if (NS_FAILED(result))
return result;
PRInt32 rulecount = rules.Count();
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
PRInt32 nextType = nsICSSRule::UNKNOWN_RULE;
nsICSSRule* nextRule = mInner->mOrderedRules.SafeObjectAt(aIndex);
if (nextRule) {
nextRule->GetType(nextType);
if (nextType == nsICSSRule::CHARSET_RULE) {
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
// check last rule in list
nsICSSRule* lastRule = rules.ObjectAt(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
nsICSSRule* firstRule = rules.ObjectAt(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;
}
nsICSSRule* prevRule = mInner->mOrderedRules.SafeObjectAt(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.InsertObjectsAt(rules, aIndex);
NS_ENSURE_TRUE(insertResult, NS_ERROR_OUT_OF_MEMORY);
DidDirty();
for (PRInt32 counter = 0; counter < rulecount; counter++) {
nsICSSRule* cssRule = rules.ObjectAt(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) {
mozAutoDocUpdate updateBatch(mDocument, UPDATE_STYLE, PR_TRUE);
result = WillDirty();
if (NS_SUCCEEDED(result)) {
if (aIndex >= PRUint32(mInner->mOrderedRules.Count()))
return NS_ERROR_DOM_INDEX_SIZE_ERR;
NS_ASSERTION(PRUint32(mInner->mOrderedRules.Count()) <= PR_INT32_MAX,
"Too many style rules!");
// Hold a strong ref to the rule so it doesn't die when we RemoveObjectAt
nsCOMPtr<nsICSSRule> rule = mInner->mOrderedRules.ObjectAt(aIndex);
if (rule) {
mInner->mOrderedRules.RemoveObjectAt(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);
nsCOMArray<nsICSSRule> rules;
result = css->ParseRule(aRule, mInner->mSheetURI, mInner->mBaseURI, rules);
NS_ENSURE_SUCCESS(result, result);
PRInt32 rulecount = rules.Count();
if (rulecount == 0) {
// Since we know aRule was not an empty string, just throw
return NS_ERROR_DOM_SYNTAX_ERR;
}
PRInt32 counter;
nsICSSRule* rule;
for (counter = 0; counter < rulecount; counter++) {
// Only rulesets are allowed in a group as of CSS2
PRInt32 type = nsICSSRule::UNKNOWN_RULE;
rule = rules.ObjectAt(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 = rules.ObjectAt(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;
}
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