mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-25 01:01:52 +00:00
7f8f4fdbfc
fine job of handling it, and this way the chrome registry only needs to clear that one cache on skin switches. Bug 185891, r=sicking, sr=roc+moz
2241 lines
70 KiB
C++
2241 lines
70 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Boris Zbarsky <bzbarsky@mit.edu>
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*
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* This Original Code has been modified by IBM Corporation. Modifications made by IBM
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* described herein are Copyright (c) International Business Machines Corporation, 2000.
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* Modifications to Mozilla code or documentation identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 04/20/2000 IBM Corp. OS/2 VisualAge build.
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*/
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#include "nsICSSLoader.h"
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#include "nsICSSLoaderObserver.h"
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#include "nsICSSParser.h"
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#include "nsICSSStyleSheet.h"
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#include "nsIParser.h"
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#include "nsIContent.h"
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#include "nsIDOMNode.h"
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#include "nsIStyleSheetLinkingElement.h"
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#include "nsIDocument.h"
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#include "nsINameSpaceManager.h"
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#include "nsIUnicharStreamLoader.h"
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#include "nsIUnicharInputStream.h"
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#include "nsIConverterInputStream.h"
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#include "nsICharsetAlias.h"
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#include "nsUnicharUtils.h"
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#include "nsHashtable.h"
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#include "nsIURL.h"
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#include "nsIURL.h"
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#include "nsIServiceManager.h"
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#include "nsNetUtil.h"
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#include "nsCRT.h"
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#include "nsCOMArray.h"
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#include "nsCOMPtr.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsITimelineService.h"
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#include "nsIHttpChannel.h"
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#include "nsIConsoleService.h"
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#include "nsIScriptError.h"
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#include "nsIStringBundle.h"
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#include "nsMimeTypes.h"
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#include "nsIAtom.h"
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#ifdef INCLUDE_XUL
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#include "nsIXULPrototypeCache.h"
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#endif
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#include "nsIDOMMediaList.h"
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#include "nsIDOMStyleSheet.h"
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#include "nsIDOMCSSStyleSheet.h"
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#include "nsIDOMCSSImportRule.h"
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#ifdef MOZ_LOGGING
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// #define FORCE_PR_LOG /* Allow logging in the release build */
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#endif /* MOZ_LOGGING */
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#include "prlog.h"
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#ifdef PR_LOGGING
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static PRLogModuleInfo *gLoaderLog = PR_NewLogModule("nsCSSLoader");
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#endif /* PR_LOGGING */
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#define LOG_FORCE(args) PR_LOG(gLoaderLog, PR_LOG_ALWAYS, args)
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#define LOG_ERROR(args) PR_LOG(gLoaderLog, PR_LOG_ERROR, args)
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#define LOG_WARN(args) PR_LOG(gLoaderLog, PR_LOG_WARNING, args)
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#define LOG_DEBUG(args) PR_LOG(gLoaderLog, PR_LOG_DEBUG, args)
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#define LOG(args) LOG_DEBUG(args)
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#define LOG_FORCE_ENABLED() PR_LOG_TEST(gLoaderLog, PR_LOG_ALWAYS)
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#define LOG_ERROR_ENABLED() PR_LOG_TEST(gLoaderLog, PR_LOG_ERROR)
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#define LOG_WARN_ENABLED() PR_LOG_TEST(gLoaderLog, PR_LOG_WARNING)
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#define LOG_DEBUG_ENABLED() PR_LOG_TEST(gLoaderLog, PR_LOG_DEBUG)
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#define LOG_ENABLED() LOG_DEBUG_ENABLED()
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#ifdef PR_LOGGING
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#define LOG_URI(format, uri) \
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PR_BEGIN_MACRO \
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NS_ASSERTION(uri, "Logging null uri"); \
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if (LOG_ENABLED()) { \
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nsCAutoString _logURISpec; \
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uri->GetSpec(_logURISpec); \
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LOG((format, _logURISpec.get())); \
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} \
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PR_END_MACRO
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#else // PR_LOGGING
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#define LOG_URI(format, uri)
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#endif // PR_LOGGING
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static NS_DEFINE_CID(kCStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
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class CSSLoaderImpl;
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/**
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* OVERALL ARCHITECTURE
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*
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* The CSS Loader gets requests to load various sorts of style sheets:
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* inline style from <style> elements, linked style, @import-ed child
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* sheets, agent sheets. The loader handles the following tasks:
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*
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* 1) Creation of the actual style sheet objects: CreateSheet()
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* 2) setting of the right media, title, enabled state, etc on the
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* sheet: PrepareSheet()
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* 3) Insertion of the sheet in the proper cascade order:
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* InsertSheetInDoc() and InsertChildSheet()
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* 4) Load of the sheet: LoadSheet()
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* 5) Parsing of the sheet: ParseSheet()
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* 6) Cleanup: SheetComplete()
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*
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* The detailed documentation for these functions is found with the
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* function implementations.
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*
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* The following helper objects are used:
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* A) URLKey -- a nsHashKey implementation that uses an nsIURI as the key
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* B) SheetLoadData -- a small class that is used to store all the
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* information needed for the loading of a sheet;
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* this class handles listening for the stream
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* loader completion and also handles charset
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* determination.
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*/
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/************************************
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* URLKey class used for hashtables *
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************************************/
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MOZ_DECL_CTOR_COUNTER(URLKey)
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class URLKey: public nsHashKey {
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public:
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URLKey(nsIURI* aURL)
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: mURL(aURL)
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{
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MOZ_COUNT_CTOR(URLKey);
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mHashValue = 0;
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nsCAutoString spec;
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mURL->GetSpec(spec);
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if (!spec.IsEmpty()) {
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mHashValue = nsCRT::HashCode(spec.get());
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}
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}
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URLKey(const URLKey& aKey)
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: mURL(aKey.mURL),
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mHashValue(aKey.mHashValue)
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{
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MOZ_COUNT_CTOR(URLKey);
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}
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virtual ~URLKey(void)
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{
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MOZ_COUNT_DTOR(URLKey);
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}
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virtual PRUint32 HashCode(void) const
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{
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return mHashValue;
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}
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virtual PRBool Equals(const nsHashKey* aKey) const
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{
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URLKey* key = (URLKey*)aKey;
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PRBool equals = PR_FALSE;
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nsresult result = mURL->Equals(key->mURL, &equals);
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return (NS_SUCCEEDED(result) && equals);
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}
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virtual nsHashKey *Clone(void) const
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{
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return new URLKey(*this);
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}
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nsCOMPtr<nsIURI> mURL;
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PRUint32 mHashValue;
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};
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/*********************************************
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* Data needed to properly load a stylesheet *
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*********************************************/
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class SheetLoadData : public nsIUnicharStreamLoaderObserver
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{
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public:
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virtual ~SheetLoadData(void);
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// Data for loading a sheet linked from a document
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SheetLoadData(CSSLoaderImpl* aLoader,
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const nsAString& aTitle,
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nsIParser* aParserToUnblock,
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nsIURI* aURI,
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nsICSSStyleSheet* aSheet,
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nsIStyleSheetLinkingElement* aOwningElement,
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nsICSSLoaderObserver* aObserver);
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// Data for loading a sheet linked from an @import rule
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SheetLoadData(CSSLoaderImpl* aLoader,
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nsIURI* aURI,
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nsICSSStyleSheet* aSheet,
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SheetLoadData* aParentData,
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nsICSSLoaderObserver* aObserver);
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// Data for loading an agent sheet
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SheetLoadData(CSSLoaderImpl* aLoader,
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nsIURI* aURI,
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nsICSSStyleSheet* aSheet,
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PRBool aSyncLoad,
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nsICSSLoaderObserver* aObserver);
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NS_DECL_ISUPPORTS
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NS_DECL_NSIUNICHARSTREAMLOADEROBSERVER
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// Hold a ref to the CSSLoader so we can call back to it to let it
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// know the load finished
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CSSLoaderImpl* mLoader; // strong ref
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// Title needed to pull datas out of the pending datas table when
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// the preferred title is changed
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nsString mTitle;
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// Parser to be told to continue parsing once the load completes
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nsCOMPtr<nsIParser> mParserToUnblock;
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// URI we're loading. Null for inline sheets
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nsCOMPtr<nsIURI> mURI;
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// The sheet we're loading data for
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nsCOMPtr<nsICSSStyleSheet> mSheet;
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// Linked list of datas for the same URI as us
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SheetLoadData* mNext; // strong ref
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// Load data for the sheet that @import-ed us if we were @import-ed
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// during the parse
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SheetLoadData* mParentData; // strong ref
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// Number of sheets we @import-ed that are still loading
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PRUint32 mPendingChildren;
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// mSyncLoad is true when the load needs to be synchronous -- right
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// now only for LoadAgentSheet with no observer
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PRPackedBool mSyncLoad;
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// mIsAgent is true if the load was triggered by LoadAgentSheet or
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// an @import from an agent sheet. Agent loads can proceed even if
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// we have no document.
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PRPackedBool mIsAgent;
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// mIsLoading is true from the moment we are placed in the loader's
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// "loading datas" table (right after the async channel is opened)
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// to the moment we are removed from said table (due to the load
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// completing or being cancelled).
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PRPackedBool mIsLoading; // Set once the data is in the "loading" table
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// mIsCancelled is set to true when a sheet load is stopped by
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// Stop() or StopLoadingSheet(). SheetLoadData::OnStreamComplete()
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// checks this to avoid parsing sheets that have been cancelled and
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// such.
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PRPackedBool mIsCancelled;
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// This is the element that imported the sheet. Needed to get the
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// charset set on it.
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nsCOMPtr<nsIStyleSheetLinkingElement> mOwningElement;
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// The observer that wishes to be notified of load completion
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nsCOMPtr<nsICSSLoaderObserver> mObserver;
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};
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NS_IMPL_ISUPPORTS1(SheetLoadData, nsIUnicharStreamLoaderObserver);
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/***********************************************************************
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* Enum that describes the state of the sheet returned by CreateSheet. *
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***********************************************************************/
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enum StyleSheetState {
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eSheetStateUnknown = 0,
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eSheetNeedsParser,
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eSheetPending,
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eSheetLoading,
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eSheetComplete
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};
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// And some convenience strings...
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#ifdef PR_LOGGING
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static const char* const gStateStrings[] = {
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"eSheetStateUnknown",
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"eSheetNeedsParser",
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"eSheetPending",
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"eSheetLoading",
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"eSheetComplete"
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};
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#endif
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/**********************
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* Loader Declaration *
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**********************/
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class CSSLoaderImpl : public nsICSSLoader
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{
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public:
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CSSLoaderImpl(void);
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virtual ~CSSLoaderImpl(void);
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NS_DECL_ISUPPORTS
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// nsICSSLoader methods
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NS_IMETHOD Init(nsIDocument* aDocument);
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NS_IMETHOD DropDocumentReference(void);
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NS_IMETHOD SetCaseSensitive(PRBool aCaseSensitive);
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NS_IMETHOD SetCompatibilityMode(nsCompatibility aCompatMode);
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NS_IMETHOD SetPreferredSheet(const nsAString& aTitle);
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NS_IMETHOD GetParserFor(nsICSSStyleSheet* aSheet,
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nsICSSParser** aParser);
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NS_IMETHOD RecycleParser(nsICSSParser* aParser);
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NS_IMETHOD LoadInlineStyle(nsIContent* aElement,
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nsIUnicharInputStream* aIn,
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const nsAString& aTitle,
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const nsAString& aMedia,
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PRInt32 aDefaultNameSpaceID,
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nsIParser* aParserToUnblock,
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PRBool& aCompleted,
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nsICSSLoaderObserver* aObserver);
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NS_IMETHOD LoadStyleLink(nsIContent* aElement,
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nsIURI* aURL,
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const nsAString& aTitle,
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const nsAString& aMedia,
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PRInt32 aDefaultNameSpaceID,
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nsIParser* aParserToUnblock,
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PRBool& aCompleted,
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nsICSSLoaderObserver* aObserver);
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NS_IMETHOD LoadChildSheet(nsICSSStyleSheet* aParentSheet,
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nsIURI* aURL,
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const nsAString& aMedia,
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PRInt32 aDefaultNameSpaceID,
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nsICSSImportRule* aRule);
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NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSStyleSheet** aSheet);
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NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSLoaderObserver* aObserver);
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// stop loading all sheets
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NS_IMETHOD Stop(void);
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// stop loading one sheet
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NS_IMETHOD StopLoadingSheet(nsIURI* aURL);
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/**
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* Is the loader enabled or not.
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* When disabled, processing of new styles is disabled and an attempt
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* to do so will fail with a return code of
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* NS_ERROR_NOT_AVAILABLE. Note that this DOES NOT disable
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* currently loading styles or already processed styles.
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*/
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NS_IMETHOD GetEnabled(PRBool *aEnabled);
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NS_IMETHOD SetEnabled(PRBool aEnabled);
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// local helper methods (some are public for access from statics)
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PRBool IsAlternate(const nsAString& aTitle);
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private:
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nsresult CreateSheet(nsIURI* aURI,
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PRUint32 aDefaultNameSpaceID,
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PRBool aSyncLoad,
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StyleSheetState& aSheetState,
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nsICSSStyleSheet** aSheet);
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nsresult PrepareSheet(nsICSSStyleSheet* aSheet,
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const nsAString& aTitle,
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const nsAString& aMedia);
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nsresult InsertSheetInDoc(nsICSSStyleSheet* aSheet,
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nsIContent* aLinkingElement,
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nsIDocument* aDocument);
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nsresult InsertChildSheet(nsICSSStyleSheet* aSheet,
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nsICSSStyleSheet* aParentSheet,
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nsICSSImportRule* aParentRule);
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nsresult InternalLoadAgentSheet(nsIURI* aURL,
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nsICSSStyleSheet** aSheet,
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nsICSSLoaderObserver* aObserver);
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public:
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nsresult LoadSheet(SheetLoadData* aLoadData, StyleSheetState aSheetState);
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protected:
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friend class SheetLoadData;
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// Protected functions and members are ones that SheetLoadData needs
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// access to
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nsresult ParseSheet(nsIUnicharInputStream* aStream,
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SheetLoadData* aLoadData,
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PRBool& aCompleted);
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public:
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void SheetComplete(SheetLoadData* aLoadData, PRBool aSucceeded);
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protected:
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// the load data needs access to the document...
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nsIDocument* mDocument; // the document we live for
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#ifdef DEBUG
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PRPackedBool mSyncCallback;
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#endif
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private:
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PRPackedBool mCaseSensitive; // is document CSS case sensitive
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PRPackedBool mEnabled; // is enabled to load new styles
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nsCompatibility mCompatMode;
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nsString mPreferredSheet; // title of preferred sheet
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nsCOMArray<nsICSSParser> mParsers; // array of CSS parsers
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nsSupportsHashtable mCompleteSheets;
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nsHashtable mLoadingDatas; // weak refs
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nsHashtable mPendingDatas; // weak refs
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// We're not likely to have many levels of @import... But likely to have
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// some. Allocate some storage, what the hell.
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nsAutoVoidArray mParsingDatas;
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};
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|
|
/********************************
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|
* SheetLoadData implementation *
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|
********************************/
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SheetLoadData::SheetLoadData(CSSLoaderImpl* aLoader,
|
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const nsAString& aTitle,
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nsIParser* aParserToUnblock,
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nsIURI* aURI,
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|
nsICSSStyleSheet* aSheet,
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nsIStyleSheetLinkingElement* aOwningElement,
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nsICSSLoaderObserver* aObserver)
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|
: mLoader(aLoader),
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|
mTitle(aTitle),
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|
mParserToUnblock(aParserToUnblock),
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|
mURI(aURI),
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|
mSheet(aSheet),
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|
mNext(nsnull),
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|
mParentData(nsnull),
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|
mPendingChildren(0),
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|
mSyncLoad(PR_FALSE),
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|
mIsAgent(PR_FALSE),
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|
mIsLoading(PR_FALSE),
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|
mIsCancelled(PR_FALSE),
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|
mOwningElement(aOwningElement),
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|
mObserver(aObserver)
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|
{
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|
NS_PRECONDITION(mLoader, "Must have a loader!");
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|
NS_ADDREF(mLoader);
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|
}
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|
SheetLoadData::SheetLoadData(CSSLoaderImpl* aLoader,
|
|
nsIURI* aURI,
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|
nsICSSStyleSheet* aSheet,
|
|
SheetLoadData* aParentData,
|
|
nsICSSLoaderObserver* aObserver)
|
|
: mLoader(aLoader),
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|
mParserToUnblock(nsnull),
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|
mURI(aURI),
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|
mSheet(aSheet),
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|
mNext(nsnull),
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|
mParentData(aParentData),
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|
mPendingChildren(0),
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|
mSyncLoad(PR_FALSE),
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|
mIsAgent(PR_FALSE),
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|
mIsLoading(PR_FALSE),
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|
mIsCancelled(PR_FALSE),
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mOwningElement(nsnull),
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mObserver(aObserver)
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{
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NS_PRECONDITION(mLoader, "Must have a loader!");
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NS_ADDREF(mLoader);
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if (mParentData) {
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NS_ADDREF(mParentData);
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mSyncLoad = mParentData->mSyncLoad;
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mIsAgent = mParentData->mIsAgent;
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++(mParentData->mPendingChildren);
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}
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}
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SheetLoadData::SheetLoadData(CSSLoaderImpl* aLoader,
|
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nsIURI* aURI,
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nsICSSStyleSheet* aSheet,
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PRBool aSyncLoad,
|
|
nsICSSLoaderObserver* aObserver)
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|
: mLoader(aLoader),
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|
mParserToUnblock(nsnull),
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|
mURI(aURI),
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|
mSheet(aSheet),
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|
mNext(nsnull),
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|
mParentData(nsnull),
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|
mPendingChildren(0),
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|
mSyncLoad(aSyncLoad),
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|
mIsAgent(PR_TRUE),
|
|
mIsLoading(PR_FALSE),
|
|
mIsCancelled(PR_FALSE),
|
|
mOwningElement(nsnull),
|
|
mObserver(aObserver)
|
|
{
|
|
|
|
NS_PRECONDITION(mLoader, "Must have a loader!");
|
|
NS_ADDREF(mLoader);
|
|
}
|
|
|
|
SheetLoadData::~SheetLoadData()
|
|
{
|
|
NS_RELEASE(mLoader);
|
|
NS_IF_RELEASE(mParentData);
|
|
NS_IF_RELEASE(mNext);
|
|
}
|
|
|
|
/*************************
|
|
* Loader Implementation *
|
|
*************************/
|
|
|
|
CSSLoaderImpl::CSSLoaderImpl(void)
|
|
: mDocument(nsnull),
|
|
mCaseSensitive(PR_FALSE),
|
|
mEnabled(PR_TRUE),
|
|
mCompatMode(eCompatibility_FullStandards)
|
|
{
|
|
}
|
|
|
|
CSSLoaderImpl::~CSSLoaderImpl(void)
|
|
{
|
|
NS_ASSERTION(mLoadingDatas.Count() == 0,
|
|
"How did we get destroyed when there are loading data?");
|
|
NS_ASSERTION(mPendingDatas.Count() == 0,
|
|
"How did we get destroyed when there are pending data?");
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS1(CSSLoaderImpl, nsICSSLoader)
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::Init(nsIDocument* aDocument)
|
|
{
|
|
NS_ASSERTION(! mDocument, "already initialized");
|
|
if (! mDocument) {
|
|
mDocument = aDocument;
|
|
return NS_OK;
|
|
}
|
|
return NS_ERROR_ALREADY_INITIALIZED;
|
|
}
|
|
|
|
PR_STATIC_CALLBACK(PRIntn)
|
|
StartAlternateLoads(nsHashKey *aKey, void *aData, void* aClosure)
|
|
{
|
|
SheetLoadData* data = NS_STATIC_CAST(SheetLoadData*, aData);
|
|
CSSLoaderImpl* loader = NS_STATIC_CAST(CSSLoaderImpl*, aClosure);
|
|
|
|
loader->LoadSheet(data, eSheetNeedsParser);
|
|
return kHashEnumerateRemove;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::DropDocumentReference(void)
|
|
{
|
|
mDocument = nsnull;
|
|
// Flush out pending datas just so we don't leak by accident. These
|
|
// loads should short-circuit through the mDocument check in
|
|
// LoadSheet and just end up in SheetComplete immediately
|
|
mPendingDatas.Enumerate(StartAlternateLoads, this);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::SetCaseSensitive(PRBool aCaseSensitive)
|
|
{
|
|
mCaseSensitive = aCaseSensitive;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::SetCompatibilityMode(nsCompatibility aCompatMode)
|
|
{
|
|
mCompatMode = aCompatMode;
|
|
return NS_OK;
|
|
}
|
|
|
|
PR_STATIC_CALLBACK(PRIntn)
|
|
StartNonAlternates(nsHashKey *aKey, void *aData, void* aClosure)
|
|
{
|
|
NS_PRECONDITION(aData, "Must have a data");
|
|
NS_PRECONDITION(aClosure, "Must have a loader");
|
|
|
|
SheetLoadData* data = NS_STATIC_CAST(SheetLoadData*, aData);
|
|
CSSLoaderImpl* loader = NS_STATIC_CAST(CSSLoaderImpl*, aClosure);
|
|
if (loader->IsAlternate(data->mTitle)) {
|
|
return kHashEnumerateNext;
|
|
}
|
|
|
|
// Need to start the load
|
|
loader->LoadSheet(data, eSheetNeedsParser);
|
|
return kHashEnumerateRemove;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::SetPreferredSheet(const nsAString& aTitle)
|
|
{
|
|
mPreferredSheet = aTitle;
|
|
|
|
// start any pending alternates that aren't alternates anymore
|
|
mPendingDatas.Enumerate(StartNonAlternates, this);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::GetParserFor(nsICSSStyleSheet* aSheet,
|
|
nsICSSParser** aParser)
|
|
{
|
|
NS_ASSERTION(aParser, "null pointer");
|
|
if (! aParser) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
nsresult result = NS_OK;
|
|
|
|
*aParser = nsnull;
|
|
PRInt32 count = mParsers.Count();
|
|
if (0 < count--) {
|
|
*aParser = mParsers[count];
|
|
NS_ADDREF(*aParser);
|
|
mParsers.RemoveObjectAt(count);
|
|
}
|
|
|
|
if (! *aParser) {
|
|
result = NS_NewCSSParser(aParser);
|
|
}
|
|
|
|
if (*aParser) {
|
|
(*aParser)->SetCaseSensitive(mCaseSensitive);
|
|
(*aParser)->SetQuirkMode(mCompatMode == eCompatibility_NavQuirks);
|
|
if (aSheet) {
|
|
(*aParser)->SetStyleSheet(aSheet);
|
|
}
|
|
(*aParser)->SetChildLoader(this);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::RecycleParser(nsICSSParser* aParser)
|
|
{
|
|
NS_PRECONDITION(aParser, "Recycle only good parsers, please");
|
|
|
|
if (!mParsers.AppendObject(aParser)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// XXX We call this function a good bit. Consider caching the service
|
|
// in a static global or something?
|
|
static nsresult ResolveCharset(const nsAString& aCharsetAlias,
|
|
nsAString& aCharset)
|
|
{
|
|
nsresult rv = NS_ERROR_NOT_AVAILABLE;
|
|
if (! aCharsetAlias.IsEmpty()) {
|
|
nsCOMPtr<nsICharsetAlias> calias(do_GetService(kCharsetAliasCID, &rv));
|
|
NS_ASSERTION(calias, "cannot find charset alias service");
|
|
if (calias)
|
|
{
|
|
rv = calias->GetPreferred(aCharsetAlias, aCharset);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static const char kCharsetSym[] = "@charset";
|
|
|
|
static nsresult GetCharsetFromData(const unsigned char* aStyleSheetData,
|
|
PRUint32 aDataLength,
|
|
nsAString& aCharset)
|
|
{
|
|
aCharset.Truncate();
|
|
if (aDataLength <= sizeof(kCharsetSym) - 1)
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
PRUint32 step = 1;
|
|
PRUint32 pos = 0;
|
|
// Determine the encoding type
|
|
if (*aStyleSheetData == 0x40 && *(aStyleSheetData+1) == 0x63 /* '@c' */ ) {
|
|
// 1-byte ASCII-based encoding (ISO-8859-*, UTF-8, etc)
|
|
step = 1;
|
|
pos = 0;
|
|
}
|
|
else if (*aStyleSheetData == 0xEF &&
|
|
*(aStyleSheetData+1) == 0xBB &&
|
|
*(aStyleSheetData+2) == 0xBF) {
|
|
// UTF-8 BOM
|
|
step = 1;
|
|
pos = 3;
|
|
}
|
|
else if (*aStyleSheetData == 0xFE && *(aStyleSheetData+1) == 0xFF) {
|
|
// big-endian 2-byte encoding BOM
|
|
step = 2;
|
|
pos = 3;
|
|
}
|
|
else if (*aStyleSheetData == 0xFF && *(aStyleSheetData+1) == 0xFE) {
|
|
// little-endian 2-byte encoding BOM
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 2;
|
|
pos = 2;
|
|
}
|
|
else if (*aStyleSheetData == 0x00 &&
|
|
*(aStyleSheetData+1) == 0x00 &&
|
|
*(aStyleSheetData+2) == 0xFE &&
|
|
*(aStyleSheetData+3) == 0xFF) {
|
|
// big-endian 4-byte encoding BOM
|
|
step = 4;
|
|
pos = 7;
|
|
}
|
|
else if (*aStyleSheetData == 0xFF &&
|
|
*(aStyleSheetData+1) == 0xFE &&
|
|
*(aStyleSheetData+2) == 0x00 &&
|
|
*(aStyleSheetData+3) == 0x00) {
|
|
// little-endian 4-byte encoding BOM
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 4;
|
|
pos = 4;
|
|
}
|
|
else if (*aStyleSheetData == 0x00 &&
|
|
*(aStyleSheetData+1) == 0x00 &&
|
|
*(aStyleSheetData+2) == 0xFF &&
|
|
*(aStyleSheetData+3) == 0xFE) {
|
|
// 4-byte encoding BOM in 2143 order
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 4;
|
|
pos = 6;
|
|
}
|
|
else if (*aStyleSheetData == 0xFE &&
|
|
*(aStyleSheetData+1) == 0xFF &&
|
|
*(aStyleSheetData+2) == 0x00 &&
|
|
*(aStyleSheetData+3) == 0x00) {
|
|
// 4-byte encoding BOM in 3412 order
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 4;
|
|
pos = 5;
|
|
}
|
|
else if (*aStyleSheetData == 0x00 &&
|
|
*(aStyleSheetData+1) == 0x00 &&
|
|
*(aStyleSheetData+2) == 0x00 &&
|
|
*(aStyleSheetData+3) == 0x40) {
|
|
// big-endian 4-byte encoding, no BOM
|
|
step = 4;
|
|
pos = 3;
|
|
}
|
|
else if (*aStyleSheetData == 0x40 &&
|
|
*(aStyleSheetData+1) == 0x00 &&
|
|
*(aStyleSheetData+2) == 0x00 &&
|
|
*(aStyleSheetData+3) == 0x00) {
|
|
// little-encoding 4-byte encoding, no BOM
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 4;
|
|
pos = 0;
|
|
}
|
|
else if (*aStyleSheetData == 0x00 &&
|
|
*(aStyleSheetData+1) == 0x00 &&
|
|
*(aStyleSheetData+2) == 0x40 &&
|
|
*(aStyleSheetData+3) == 0x00) {
|
|
// 4-byte encoding in 2143 order, no BOM
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 4;
|
|
pos = 2;
|
|
}
|
|
else if (*aStyleSheetData == 0x00 &&
|
|
*(aStyleSheetData+1) == 0x40 &&
|
|
*(aStyleSheetData+2) == 0x00 &&
|
|
*(aStyleSheetData+3) == 0x00) {
|
|
// 4-byte encoding in 3412 order, no BOM
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 4;
|
|
pos = 1;
|
|
}
|
|
else if (*aStyleSheetData == 0x00 &&
|
|
*(aStyleSheetData+1) == 0x40 &&
|
|
*(aStyleSheetData+2) == 0x00 &&
|
|
*(aStyleSheetData+3) == 0x00) {
|
|
// 4-byte encoding in 3412 order, no BOM
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 4;
|
|
pos = 1;
|
|
}
|
|
else if (*aStyleSheetData == 0x00 &&
|
|
*(aStyleSheetData+1) == 0x40 &&
|
|
*(aStyleSheetData+2) == 0x00 &&
|
|
*(aStyleSheetData+3) == 0x63) {
|
|
// 2-byte big-endian encoding, no BOM
|
|
step = 2;
|
|
pos = 1;
|
|
}
|
|
else if (*aStyleSheetData == 0x40 &&
|
|
*(aStyleSheetData+1) == 0x00 &&
|
|
*(aStyleSheetData+2) == 0x63 &&
|
|
*(aStyleSheetData+3) == 0x00) {
|
|
// 2-byte big-endian encoding, no BOM
|
|
NS_WARNING("Our unicode decoders aren't likely to deal with this one");
|
|
step = 2;
|
|
pos = 0;
|
|
}
|
|
else {
|
|
// no clue what this is
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
PRUint32 index = 0;
|
|
while (pos < aDataLength && index < sizeof(kCharsetSym) - 1) {
|
|
if (aStyleSheetData[pos] != kCharsetSym[index]) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
++index;
|
|
pos += step;
|
|
}
|
|
|
|
while (pos < aDataLength && nsCRT::IsAsciiSpace(aStyleSheetData[pos])) {
|
|
pos += step;
|
|
}
|
|
|
|
if (pos >= aDataLength ||
|
|
(aStyleSheetData[pos] != '"' && aStyleSheetData[pos] != '\'')) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
char quote = aStyleSheetData[pos];
|
|
pos += step;
|
|
while (pos < aDataLength) {
|
|
if (aStyleSheetData[pos] == '\\') {
|
|
pos += step;
|
|
if (pos >= aDataLength) {
|
|
break;
|
|
}
|
|
} else if (aStyleSheetData[pos] == quote) {
|
|
break;
|
|
}
|
|
|
|
aCharset.Append(PRUnichar(aStyleSheetData[pos]));
|
|
pos += step;
|
|
}
|
|
|
|
// Check for the ending ';'
|
|
pos += step;
|
|
while (pos < aDataLength && nsCRT::IsAsciiSpace(aStyleSheetData[pos])) {
|
|
pos += step;
|
|
}
|
|
|
|
if (pos >= aDataLength || aStyleSheetData[pos] != ';') {
|
|
aCharset.Truncate();
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
SheetLoadData::OnDetermineCharset(nsIUnicharStreamLoader* aLoader,
|
|
nsISupports* aContext,
|
|
const char* aData,
|
|
PRUint32 aDataLength,
|
|
nsACString& aCharset)
|
|
{
|
|
nsCOMPtr<nsIChannel> channel;
|
|
nsresult result = aLoader->GetChannel(getter_AddRefs(channel));
|
|
if (NS_FAILED(result))
|
|
channel = nsnull;
|
|
|
|
/*
|
|
* First determine the charset (if one is indicated)
|
|
* 1) Check nsIChannel::contentCharset
|
|
* 2) Check @charset rules in the data
|
|
* 3) Check "charset" attribute of the <LINK> or <?xml-stylesheet?>
|
|
*
|
|
* If all these fail to give us a charset, fall back on our
|
|
* default (document charset or ISO-8859-1 if we have no document
|
|
* charset)
|
|
*/
|
|
nsAutoString charset;
|
|
nsAutoString charsetCandidate;
|
|
if (channel) {
|
|
nsCAutoString charsetVal;
|
|
channel->GetContentCharset(charsetVal);
|
|
CopyASCIItoUCS2(charsetVal, charsetCandidate);
|
|
}
|
|
|
|
result = NS_ERROR_NOT_AVAILABLE;
|
|
if (! charsetCandidate.IsEmpty()) {
|
|
#ifdef DEBUG_bzbarsky
|
|
fprintf(stderr, "Setting from HTTP to: %s\n", NS_ConvertUCS2toUTF8(charsetCandidate).get());
|
|
#endif
|
|
result = ResolveCharset(charsetCandidate, charset);
|
|
}
|
|
|
|
if (NS_FAILED(result)) {
|
|
// We have no charset or the HTTP charset is not recognized.
|
|
// Try @charset rule
|
|
result = GetCharsetFromData((const unsigned char*)aData,
|
|
aDataLength, charsetCandidate);
|
|
if (NS_SUCCEEDED(result)) {
|
|
#ifdef DEBUG_bzbarsky
|
|
fprintf(stderr, "Setting from @charset rule: %s\n",
|
|
NS_ConvertUCS2toUTF8(charsetCandidate).get());
|
|
#endif
|
|
result = ResolveCharset(charsetCandidate, charset);
|
|
}
|
|
}
|
|
|
|
if (NS_FAILED(result)) {
|
|
// Now try the charset on the <link> or processing instruction
|
|
// that loaded us
|
|
if (mOwningElement) {
|
|
mOwningElement->GetCharset(charsetCandidate);
|
|
if (! charsetCandidate.IsEmpty()) {
|
|
#ifdef DEBUG_bzbarsky
|
|
fprintf(stderr, "Setting from property on element: %s\n",
|
|
NS_ConvertUCS2toUTF8(charsetCandidate).get());
|
|
#endif
|
|
result = ResolveCharset(charsetCandidate, charset);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NS_FAILED(result) && mLoader->mDocument) {
|
|
// no useful data on charset. Try the document charset.
|
|
// That needs no resolution, since it's already fully resolved
|
|
mLoader->mDocument->GetDocumentCharacterSet(charset);
|
|
#ifdef DEBUG_bzbarsky
|
|
fprintf(stderr, "Set from document: %s\n",
|
|
NS_ConvertUCS2toUTF8(charset).get());
|
|
#endif
|
|
}
|
|
|
|
if (charset.IsEmpty()) {
|
|
NS_WARNING("Unable to determine charset for sheet, using ISO-8859-1!");
|
|
charset = NS_LITERAL_STRING("ISO-8859-1");
|
|
}
|
|
|
|
aCharset = NS_ConvertUCS2toUTF8(charset);
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Report an error to the error console.
|
|
* @param aErrorName The name of a string in css.properties.
|
|
* @param aParams The parameters for that string in css.properties.
|
|
* @param aParamsLength The length of aParams.
|
|
* @param aErrorFlags Error/warning flag to pass to nsIScriptError::Init.
|
|
*
|
|
* XXX This should be a static method on a class called something like
|
|
* nsCSSUtils, since it's a general way of accessing css.properties and
|
|
* will be useful for localizability work on CSS parser error reporting.
|
|
* However, it would need some way of reporting source file name, text,
|
|
* line, and column information.
|
|
*/
|
|
static nsresult
|
|
ReportToConsole(const PRUnichar* aMessageName, const PRUnichar **aParams,
|
|
PRUint32 aParamsLength, PRUint32 aErrorFlags)
|
|
{
|
|
nsresult rv;
|
|
nsCOMPtr<nsIConsoleService> consoleService =
|
|
do_GetService(NS_CONSOLESERVICE_CONTRACTID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
nsCOMPtr<nsIScriptError> errorObject =
|
|
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
nsCOMPtr<nsIStringBundleService> stringBundleService =
|
|
do_GetService(kCStringBundleServiceCID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
nsCOMPtr<nsIStringBundle> bundle;
|
|
rv = stringBundleService->CreateBundle(
|
|
"chrome://global/locale/css.properties", getter_AddRefs(bundle));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsXPIDLString errorText;
|
|
rv = bundle->FormatStringFromName(aMessageName, aParams, aParamsLength,
|
|
getter_Copies(errorText));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
rv = errorObject->Init(errorText.get(),
|
|
NS_LITERAL_STRING("").get(), /* file name */
|
|
NS_LITERAL_STRING("").get(), /* source line */
|
|
0, /* line number */
|
|
0, /* column number */
|
|
aErrorFlags,
|
|
"CSS Loader");
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
consoleService->LogMessage(errorObject);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/*
|
|
* Here we need to check that the load did not give us an http error
|
|
* page and check the mimetype on the channel to make sure we're not
|
|
* loading non-text/css data in standards mode.
|
|
*/
|
|
NS_IMETHODIMP
|
|
SheetLoadData::OnStreamComplete(nsIUnicharStreamLoader* aLoader,
|
|
nsISupports* aContext,
|
|
nsresult aStatus,
|
|
nsIUnicharInputStream* aDataStream)
|
|
{
|
|
LOG(("SheetLoadData::OnStreamComplete"));
|
|
NS_ASSERTION(!mLoader->mSyncCallback, "Synchronous callback from necko");
|
|
|
|
if (mIsCancelled) {
|
|
// Just return. Don't call SheetComplete -- it's already been
|
|
// called and calling it again will lead to an extra NS_RELEASE on
|
|
// this data and a likely crash.
|
|
return NS_OK;
|
|
}
|
|
|
|
if (!mLoader->mDocument && !mIsAgent) {
|
|
// Sorry, we don't care about this load anymore
|
|
LOG_WARN((" No document and not agent sheet; dropping load"));
|
|
mLoader->SheetComplete(this, PR_FALSE);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIChannel> channel;
|
|
nsresult result = aLoader->GetChannel(getter_AddRefs(channel));
|
|
if (NS_FAILED(result))
|
|
channel = nsnull;
|
|
|
|
#ifdef MOZ_TIMELINE
|
|
NS_TIMELINE_OUTDENT();
|
|
NS_TIMELINE_MARK_CHANNEL("SheetLoadData::OnStreamComplete(%s)", channel);
|
|
#endif // MOZ_TIMELINE
|
|
|
|
// If it's an HTTP channel, we want to make sure this is not an
|
|
// error document we got.
|
|
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
|
|
if (httpChannel) {
|
|
PRBool requestSucceeded;
|
|
result = httpChannel->GetRequestSucceeded(&requestSucceeded);
|
|
if (NS_SUCCEEDED(result) && !requestSucceeded) {
|
|
LOG((" Load returned an error page"));
|
|
mLoader->SheetComplete(this, PR_FALSE);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
if (aDataStream) {
|
|
nsCAutoString contentType;
|
|
if (channel) {
|
|
channel->GetContentType(contentType);
|
|
}
|
|
|
|
PRBool validType = contentType.Equals(NS_LITERAL_CSTRING("text/css")) ||
|
|
contentType.Equals(NS_LITERAL_CSTRING(UNKNOWN_CONTENT_TYPE)) ||
|
|
contentType.IsEmpty();
|
|
|
|
if (mLoader->mCompatMode == eCompatibility_NavQuirks || validType) {
|
|
if (!validType) {
|
|
nsCAutoString spec;
|
|
if (channel) {
|
|
nsCOMPtr<nsIURI> uri;
|
|
channel->GetURI(getter_AddRefs(uri));
|
|
if (uri)
|
|
uri->GetSpec(spec);
|
|
}
|
|
|
|
const nsAFlatString& specUCS2 = NS_ConvertUTF8toUCS2(spec);
|
|
const nsAFlatString& ctypeUCS2 = NS_ConvertASCIItoUCS2(contentType);
|
|
const PRUnichar *strings[] = { specUCS2.get(), ctypeUCS2.get() };
|
|
|
|
ReportToConsole(NS_LITERAL_STRING("MimeNotCssWarn").get(), strings, 2,
|
|
nsIScriptError::warningFlag);
|
|
}
|
|
} else {
|
|
// Drop the data stream so that we do not load it
|
|
aDataStream = nsnull;
|
|
|
|
nsCAutoString spec;
|
|
if (channel) {
|
|
nsCOMPtr<nsIURI> uri;
|
|
channel->GetURI(getter_AddRefs(uri));
|
|
if (uri)
|
|
uri->GetSpec(spec);
|
|
}
|
|
|
|
const nsAFlatString& specUCS2 = NS_ConvertUTF8toUCS2(spec);
|
|
const nsAFlatString& ctypeUCS2 = NS_ConvertASCIItoUCS2(contentType);
|
|
const PRUnichar *strings[] = { specUCS2.get(), ctypeUCS2.get() };
|
|
|
|
ReportToConsole(NS_LITERAL_STRING("MimeNotCss").get(), strings, 2,
|
|
nsIScriptError::errorFlag);
|
|
}
|
|
}
|
|
|
|
if (NS_FAILED(aStatus) || !aDataStream) {
|
|
LOG_WARN((" Load failed: status %u, data stream %p",
|
|
aStatus, aDataStream));
|
|
mLoader->SheetComplete(this, PR_FALSE);
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool completed;
|
|
return mLoader->ParseSheet(aDataStream, this, completed);
|
|
}
|
|
|
|
#ifdef INCLUDE_XUL
|
|
static PRBool IsChromeURI(nsIURI* aURI)
|
|
{
|
|
NS_ASSERTION(aURI, "Have to pass in a URI");
|
|
PRBool isChrome = PR_FALSE;
|
|
aURI->SchemeIs("chrome", &isChrome);
|
|
return isChrome;
|
|
}
|
|
#endif
|
|
|
|
typedef nsresult (*nsStringEnumFunc)(const nsAString& aSubString, void *aData);
|
|
|
|
static nsresult EnumerateMediaString(const nsAString& aStringList, nsStringEnumFunc aFunc, void* aData)
|
|
{
|
|
nsresult status = NS_OK;
|
|
|
|
nsAutoString stringList(aStringList); // copy to work buffer
|
|
nsAutoString subStr;
|
|
|
|
stringList.Append(kNullCh); // put an extra null at the end
|
|
|
|
PRUnichar* start = (PRUnichar*)(const PRUnichar*)stringList.get();
|
|
PRUnichar* end = start;
|
|
|
|
while (NS_SUCCEEDED(status) && (kNullCh != *start)) {
|
|
PRBool quoted = PR_FALSE;
|
|
|
|
while ((kNullCh != *start) && nsCRT::IsAsciiSpace(*start)) { // skip leading space
|
|
start++;
|
|
}
|
|
|
|
if ((kApostrophe == *start) || (kQuote == *start)) { // quoted string
|
|
PRUnichar quote = *start++;
|
|
quoted = PR_TRUE;
|
|
end = start;
|
|
while (kNullCh != *end) {
|
|
if (quote == *end) { // found closing quote
|
|
*end++ = kNullCh; // end string here
|
|
while ((kNullCh != *end) && (kComma != *end)) { // keep going until comma
|
|
end++;
|
|
}
|
|
break;
|
|
}
|
|
end++;
|
|
}
|
|
}
|
|
else { // non-quoted string or ended
|
|
end = start;
|
|
|
|
while ((kNullCh != *end) && (kComma != *end)) { // look for comma
|
|
end++;
|
|
}
|
|
*end = kNullCh; // end string here
|
|
}
|
|
|
|
// truncate at first non letter, digit or hyphen
|
|
PRUnichar* test = start;
|
|
while (test <= end) {
|
|
if ((PR_FALSE == nsCRT::IsAsciiAlpha(*test)) &&
|
|
(PR_FALSE == nsCRT::IsAsciiDigit(*test)) && (kMinus != *test)) {
|
|
*test = kNullCh;
|
|
break;
|
|
}
|
|
test++;
|
|
}
|
|
subStr = start;
|
|
|
|
if (PR_FALSE == quoted) {
|
|
subStr.CompressWhitespace(PR_FALSE, PR_TRUE);
|
|
}
|
|
|
|
if (!subStr.IsEmpty()) {
|
|
status = (*aFunc)(subStr, aData);
|
|
}
|
|
|
|
start = ++end;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static nsresult MediumEnumFunc(const nsAString& aSubString, void* aData)
|
|
{
|
|
nsCOMPtr<nsIAtom> medium = do_GetAtom(aSubString);
|
|
NS_ENSURE_TRUE(medium, NS_ERROR_OUT_OF_MEMORY);
|
|
((nsICSSStyleSheet*)aData)->AppendMedium(medium);
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
CSSLoaderImpl::IsAlternate(const nsAString& aTitle)
|
|
{
|
|
if (!aTitle.IsEmpty()) {
|
|
return PRBool(! aTitle.Equals(mPreferredSheet, nsCaseInsensitiveStringComparator()));
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/**
|
|
* CreateSheet() creates an nsICSSStyleSheet object for the given URI,
|
|
* if any. If there is no URI given, we just create a new style sheet
|
|
* object. Otherwise, we check for an existing style sheet object for
|
|
* that uri in various caches and clone it if we find it. Cloned
|
|
* sheets will have the title/media/enabled state of the sheet they
|
|
* are clones off; make sure to call PrepareSheet() on the result of
|
|
* CreateSheet().
|
|
*/
|
|
nsresult
|
|
CSSLoaderImpl::CreateSheet(nsIURI* aURI,
|
|
PRUint32 aDefaultNameSpaceID,
|
|
PRBool aSyncLoad,
|
|
StyleSheetState& aSheetState,
|
|
nsICSSStyleSheet** aSheet)
|
|
{
|
|
LOG(("CSSLoaderImpl::CreateSheet"));
|
|
NS_PRECONDITION(aSheet, "Null out param!");
|
|
|
|
nsresult rv = NS_OK;
|
|
*aSheet = nsnull;
|
|
aSheetState = eSheetStateUnknown;
|
|
|
|
if (aURI) {
|
|
aSheetState = eSheetComplete;
|
|
nsCOMPtr<nsICSSStyleSheet> sheet;
|
|
|
|
// First, the XUL cache
|
|
#ifdef INCLUDE_XUL
|
|
if (IsChromeURI(aURI)) {
|
|
nsCOMPtr<nsIXULPrototypeCache> cache(do_GetService("@mozilla.org/xul/xul-prototype-cache;1"));
|
|
if (cache) {
|
|
PRBool enabled;
|
|
cache->GetEnabled(&enabled);
|
|
if (enabled) {
|
|
cache->GetStyleSheet(aURI, getter_AddRefs(sheet));
|
|
LOG((" From XUL cache: %p", sheet.get()));
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (!sheet) {
|
|
// Then complete sheets
|
|
URLKey key(aURI);
|
|
sheet = dont_AddRef(NS_STATIC_CAST(nsICSSStyleSheet*,
|
|
mCompleteSheets.Get(&key)));
|
|
LOG((" From completed: %p", sheet.get()));
|
|
|
|
// Then loading sheets
|
|
if (!sheet && !aSyncLoad) {
|
|
aSheetState = eSheetLoading;
|
|
SheetLoadData* loadData =
|
|
NS_STATIC_CAST(SheetLoadData*, mLoadingDatas.Get(&key));
|
|
if (loadData) {
|
|
sheet = loadData->mSheet;
|
|
LOG((" From loading: %p", sheet.get()));
|
|
}
|
|
|
|
// Then alternate sheets
|
|
if (!sheet) {
|
|
aSheetState = eSheetPending;
|
|
SheetLoadData* loadData =
|
|
NS_STATIC_CAST(SheetLoadData*, mPendingDatas.Get(&key));
|
|
if (loadData) {
|
|
sheet = loadData->mSheet;
|
|
LOG((" From pending: %p", sheet.get()));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (sheet) {
|
|
// We can use this cached sheet if it's either incomplete or unmodified
|
|
PRBool modified = PR_TRUE;
|
|
sheet->IsModified(&modified);
|
|
PRBool complete = PR_FALSE;
|
|
sheet->GetComplete(complete);
|
|
if (!modified || !complete) {
|
|
// Proceed on failures; at worst we'll try to create one below
|
|
sheet->Clone(*aSheet);
|
|
NS_ASSERTION(complete || aSheetState != eSheetComplete,
|
|
"Sheet thinks it's not complete while we think it is");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!*aSheet) {
|
|
aSheetState = eSheetNeedsParser;
|
|
nsCOMPtr<nsIURI> sheetURI = aURI;
|
|
// Need to create one now
|
|
if (!sheetURI) {
|
|
// Inline style. Use the document's base URL so that @import in
|
|
// the inline sheet picks up the right base.
|
|
NS_ASSERTION(mDocument, "How did we get in here without a document?");
|
|
mDocument->GetBaseURL(*getter_AddRefs(sheetURI));
|
|
}
|
|
|
|
rv = NS_NewCSSStyleSheet(aSheet, sheetURI);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
(*aSheet)->SetDefaultNameSpaceID(aDefaultNameSpaceID);
|
|
}
|
|
|
|
NS_ASSERTION(*aSheet, "We should have a sheet by now!");
|
|
NS_ASSERTION(aSheetState != eSheetStateUnknown, "Have to set a state!");
|
|
LOG((" State: %s", gStateStrings[aSheetState]));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* PrepareSheet() handles setting the media and title on the sheet, as
|
|
* well as setting the enabled state based on the title
|
|
*/
|
|
nsresult
|
|
CSSLoaderImpl::PrepareSheet(nsICSSStyleSheet* aSheet,
|
|
const nsAString& aTitle,
|
|
const nsAString& aMedia)
|
|
{
|
|
NS_PRECONDITION(aSheet, "Must have a sheet!");
|
|
|
|
nsresult rv = NS_OK;
|
|
aSheet->ClearMedia();
|
|
if (!aMedia.IsEmpty()) {
|
|
rv = EnumerateMediaString(aMedia, MediumEnumFunc, aSheet);
|
|
}
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
aSheet->SetTitle(aTitle);
|
|
aSheet->SetEnabled(! IsAlternate(aTitle));
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* InsertSheetInDoc handles ordering of sheets in the document. Here
|
|
* we have two types of sheets -- those with linking elements and
|
|
* those without. The latter are loaded by Link: headers.
|
|
* The following constraints are observed:
|
|
* 1) Any sheet with a linking element comes after all sheets without
|
|
* linking elements
|
|
* 2) Sheets without linking elements are inserted in the order in
|
|
* which the inserting requests come in, since all of these are
|
|
* inserted during header data processing in the content sink
|
|
* 3) Sheets with linking elements are ordered based on document order
|
|
* as determined by CompareDocumentPosition.
|
|
*/
|
|
nsresult
|
|
CSSLoaderImpl::InsertSheetInDoc(nsICSSStyleSheet* aSheet,
|
|
nsIContent* aLinkingElement,
|
|
nsIDocument* aDocument)
|
|
{
|
|
LOG(("CSSLoaderImpl::InsertSheetInDoc"));
|
|
NS_PRECONDITION(aSheet, "Nothing to insert");
|
|
NS_PRECONDITION(aDocument, "Must have a document to insert into");
|
|
|
|
// all nodes that link in sheets should be implementing nsIDOM3Node
|
|
nsresult rv = NS_OK;
|
|
nsCOMPtr<nsIDOM3Node> linkingNode = do_QueryInterface(aLinkingElement);
|
|
NS_ASSERTION(linkingNode || !aLinkingElement,
|
|
"Need to implement nsIDOM3Node to get insertion order right");
|
|
|
|
// XXX Need to cancel pending sheet loads for this element, if any
|
|
|
|
PRInt32 sheetCount;
|
|
aDocument->GetNumberOfStyleSheets(PR_FALSE, &sheetCount);
|
|
|
|
/*
|
|
* Start the walk at the _end_ of the list, since in the typical
|
|
* case we'll just want to append anyway. We want to break out of
|
|
* the loop when insertionPoint points to just before the index we
|
|
* want to insert at. In other words, when we leave the loop
|
|
* insertionPoint is the index of the stylesheet that immediately
|
|
* precedes the one we're inserting.
|
|
*/
|
|
PRInt32 insertionPoint;
|
|
for (insertionPoint = sheetCount - 1; insertionPoint >= 0; --insertionPoint) {
|
|
nsCOMPtr<nsIStyleSheet> curSheet;
|
|
aDocument->GetStyleSheetAt(insertionPoint, PR_FALSE,
|
|
getter_AddRefs(curSheet));
|
|
NS_ASSERTION(curSheet, "There must be a sheet here!");
|
|
nsCOMPtr<nsIDOMStyleSheet> domSheet = do_QueryInterface(curSheet);
|
|
NS_ASSERTION(domSheet, "All the \"normal\" sheets implement nsIDOMStyleSheet");
|
|
nsCOMPtr<nsIDOMNode> sheetOwner;
|
|
domSheet->GetOwnerNode(getter_AddRefs(sheetOwner));
|
|
if (sheetOwner && !linkingNode) {
|
|
// Keep moving; all sheets with a sheetOwner come after all
|
|
// sheets without a linkingNode
|
|
continue;
|
|
}
|
|
|
|
if (!sheetOwner) {
|
|
// Aha! The current sheet has no sheet owner, so we want to
|
|
// insert after it no matter whether we have a linkingNode
|
|
break;
|
|
}
|
|
|
|
// Have to compare
|
|
PRUint16 comparisonFlags = 0;
|
|
rv = linkingNode->CompareDocumentPosition(sheetOwner, &comparisonFlags);
|
|
// If we can't get the order right, just bail...
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ASSERTION(!(comparisonFlags & nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED),
|
|
"Why are these elements in different documents?");
|
|
#ifdef DEBUG
|
|
{
|
|
PRBool sameNode = PR_FALSE;
|
|
linkingNode->IsSameNode(sheetOwner, &sameNode);
|
|
NS_ASSERTION(!sameNode, "Why do we still have our old sheet?");
|
|
}
|
|
#endif // DEBUG
|
|
if (comparisonFlags & nsIDOMNode::DOCUMENT_POSITION_PRECEDING) {
|
|
// The current sheet comes before us, and it better be the first
|
|
// such, because now we break
|
|
break;
|
|
}
|
|
}
|
|
|
|
++insertionPoint; // adjust the index to the spot we want to insert in
|
|
|
|
// XXX <meta> elements do not implement nsIStyleSheetLinkingElement;
|
|
// need to fix this for them to be ordered correctly.
|
|
nsCOMPtr<nsIStyleSheetLinkingElement>
|
|
linkingElement = do_QueryInterface(aLinkingElement);
|
|
if (linkingElement) {
|
|
linkingElement->SetStyleSheet(aSheet); // This sets the ownerNode on the sheet
|
|
}
|
|
|
|
aDocument->InsertStyleSheetAt(aSheet, insertionPoint);
|
|
LOG((" Inserting into document at position %d", insertionPoint));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* InsertChildSheet handles ordering of @import-ed sheet in their
|
|
* parent sheets. Here we want to just insert based on order of the
|
|
* @import rules that imported the sheets. In theory we can't just
|
|
* append to the end because the CSSOM can insert @import rules. In
|
|
* practice, we get the call to load the child sheet before the CSSOM
|
|
* has finished inserting the @import rule, so we have no idea where
|
|
* to put it anyway. So just append for now.
|
|
*/
|
|
nsresult
|
|
CSSLoaderImpl::InsertChildSheet(nsICSSStyleSheet* aSheet,
|
|
nsICSSStyleSheet* aParentSheet,
|
|
nsICSSImportRule* aParentRule)
|
|
{
|
|
LOG(("CSSLoaderImpl::InsertChildSheet"));
|
|
NS_PRECONDITION(aSheet, "Nothing to insert");
|
|
NS_PRECONDITION(aParentSheet, "Need a parent to insert into");
|
|
NS_PRECONDITION(aParentSheet, "How did we get imported?");
|
|
|
|
// child sheets should always start out enabled, even if they got
|
|
// cloned off of top-level sheets which were disabled
|
|
aSheet->SetEnabled(PR_TRUE);
|
|
|
|
aParentSheet->AppendStyleSheet(aSheet);
|
|
aParentRule->SetSheet(aSheet); // This sets the ownerRule on the sheet
|
|
|
|
LOG((" Inserting into parent sheet"));
|
|
// LOG((" Inserting into parent sheet at position %d", insertionPoint));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* LoadSheet handles the actual load of a sheet. If the load is
|
|
* supposed to be synchronous it just opens a channel synchronously
|
|
* using the given uri, wraps the resulting stream in a converter
|
|
* stream and calls ParseSheet. Otherwise it tries to look for an
|
|
* existing load for this URI and piggyback on it. Failing all that,
|
|
* a new load is kicked off asynchronously.
|
|
*/
|
|
nsresult
|
|
CSSLoaderImpl::LoadSheet(SheetLoadData* aLoadData, StyleSheetState aSheetState)
|
|
{
|
|
LOG(("CSSLoaderImpl::LoadSheet"));
|
|
NS_PRECONDITION(aLoadData, "Need a load data");
|
|
NS_PRECONDITION(aLoadData->mURI, "Need a URI to load");
|
|
NS_PRECONDITION(aLoadData->mSheet, "Need a sheet to load into");
|
|
NS_PRECONDITION(aSheetState != eSheetComplete, "Why bother?");
|
|
|
|
LOG_URI(" Load from: '%s'", aLoadData->mURI);
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
if (!mDocument && !aLoadData->mIsAgent) {
|
|
// No point starting the load; just release all the data and such.
|
|
LOG_WARN((" No document and not agent sheet; pre-dropping load"));
|
|
SheetComplete(aLoadData, PR_FALSE);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aLoadData->mSyncLoad) {
|
|
LOG((" Synchronous load"));
|
|
NS_ASSERTION(aSheetState == eSheetNeedsParser,
|
|
"Sync loads can't reuse existing async loads");
|
|
|
|
// Just load it
|
|
nsCOMPtr<nsIInputStream> stream;
|
|
rv = NS_OpenURI(getter_AddRefs(stream), aLoadData->mURI);
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to open URI synchronously"));
|
|
SheetComplete(aLoadData, PR_FALSE);
|
|
return rv;
|
|
}
|
|
|
|
nsCOMPtr<nsIConverterInputStream> converterStream =
|
|
do_CreateInstance("@mozilla.org/intl/converter-input-stream;1", &rv);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to create converter stream"));
|
|
SheetComplete(aLoadData, PR_FALSE);
|
|
return rv;
|
|
}
|
|
|
|
// This forces UA sheets to be UTF-8. We should really look for
|
|
// @charset rules here via ReadSegments on the raw stream...
|
|
|
|
// 8192 is a nice magic number that happens to be what a lot of
|
|
// other things use for buffer sizes.
|
|
rv = converterStream->Init(stream, NS_LITERAL_STRING("UTF-8").get(),
|
|
8192, PR_TRUE);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to initialize converter stream"));
|
|
SheetComplete(aLoadData, PR_FALSE);
|
|
return rv;
|
|
}
|
|
|
|
PRBool completed;
|
|
rv = ParseSheet(converterStream, aLoadData, completed);
|
|
NS_ASSERTION(completed, "sync load did not complete");
|
|
return rv;
|
|
}
|
|
|
|
URLKey key(aLoadData->mURI);
|
|
SheetLoadData* existingData = nsnull;
|
|
|
|
if (aSheetState == eSheetLoading) {
|
|
existingData = NS_STATIC_CAST(SheetLoadData*, mLoadingDatas.Get(&key));
|
|
NS_ASSERTION(existingData, "CreateSheet lied about the state");
|
|
}
|
|
else if (aSheetState == eSheetPending){
|
|
existingData = NS_STATIC_CAST(SheetLoadData*, mPendingDatas.Get(&key));
|
|
NS_ASSERTION(existingData, "CreateSheet lied about the state");
|
|
}
|
|
|
|
if (existingData) {
|
|
LOG((" Glomming on to existing load"));
|
|
SheetLoadData* data = existingData;
|
|
while (data->mNext) {
|
|
data = data->mNext;
|
|
}
|
|
data->mNext = aLoadData; // transfer ownership
|
|
if (aSheetState == eSheetPending && !IsAlternate(aLoadData->mTitle)) {
|
|
// Kick the load off; someone cares about it right away
|
|
#ifdef DEBUG
|
|
SheetLoadData* removedData =
|
|
#endif
|
|
NS_STATIC_CAST(SheetLoadData*, mPendingDatas.Remove(&key));
|
|
NS_ASSERTION(removedData == existingData, "Broken pending table");
|
|
|
|
LOG((" Forcing load of pending data"));
|
|
LoadSheet(existingData, eSheetNeedsParser);
|
|
}
|
|
// All done here; once the load completes we'll be marked complete
|
|
// automatically
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
mSyncCallback = PR_TRUE;
|
|
#endif
|
|
nsCOMPtr<nsILoadGroup> loadGroup;
|
|
if (mDocument) {
|
|
mDocument->GetDocumentLoadGroup(getter_AddRefs(loadGroup));
|
|
NS_ASSERTION(loadGroup,
|
|
"No loadgroup for stylesheet; onload will fire early");
|
|
}
|
|
|
|
#ifdef MOZ_TIMELINE
|
|
NS_TIMELINE_MARK_URI("Loading style sheet: %s", aLoadData->mURI);
|
|
NS_TIMELINE_INDENT();
|
|
#endif
|
|
|
|
nsCOMPtr<nsIChannel> channel;
|
|
rv = NS_NewChannel(getter_AddRefs(channel),
|
|
aLoadData->mURI, nsnull, loadGroup,
|
|
nsnull, nsIChannel::LOAD_NORMAL);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to create channel"));
|
|
SheetComplete(aLoadData, PR_FALSE);
|
|
return rv;
|
|
}
|
|
|
|
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
|
|
if (httpChannel) {
|
|
// send a minimal Accept header for text/css
|
|
httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("Accept"),
|
|
NS_LITERAL_CSTRING("text/css,*/*;q=0.1"),
|
|
PR_FALSE);
|
|
if (mDocument) {
|
|
nsCOMPtr<nsIURI> documentURI;
|
|
mDocument->GetDocumentURL(getter_AddRefs(documentURI));
|
|
NS_ASSERTION(documentURI, "Null document uri is bad!");
|
|
if (documentURI) {
|
|
httpChannel->SetReferrer(documentURI);
|
|
}
|
|
}
|
|
}
|
|
|
|
// We don't have to hold on to the stream loader. The ownership
|
|
// model is: Necko owns the stream loader, which owns the load data,
|
|
// which owns us
|
|
nsCOMPtr<nsIUnicharStreamLoader> streamLoader;
|
|
rv = NS_NewUnicharStreamLoader(getter_AddRefs(streamLoader),
|
|
channel, aLoadData);
|
|
|
|
#ifdef DEBUG
|
|
mSyncCallback = PR_FALSE;
|
|
#endif
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to create stream loader"));
|
|
SheetComplete(aLoadData, PR_FALSE);
|
|
return rv;
|
|
}
|
|
|
|
mLoadingDatas.Put(&key, aLoadData);
|
|
aLoadData->mIsLoading = PR_TRUE;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* ParseSheet handles parsing the data stream. The main idea here is
|
|
* to push the current load data onto the parse stack before letting
|
|
* the CSS parser at the data stream. That lets us handle @import
|
|
* correctly.
|
|
*/
|
|
nsresult
|
|
CSSLoaderImpl::ParseSheet(nsIUnicharInputStream* aStream,
|
|
SheetLoadData* aLoadData,
|
|
PRBool& aCompleted)
|
|
{
|
|
LOG(("CSSLoaderImpl::ParseSheet"));
|
|
NS_PRECONDITION(aStream, "Must have data to parse");
|
|
NS_PRECONDITION(aLoadData, "Must have load data");
|
|
NS_PRECONDITION(aLoadData->mSheet, "Must have sheet to parse into");
|
|
|
|
aCompleted = PR_FALSE;
|
|
|
|
nsresult rv;
|
|
nsCOMPtr<nsICSSParser> parser;
|
|
rv = GetParserFor(aLoadData->mSheet, getter_AddRefs(parser));
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to get CSS parser"));
|
|
SheetComplete(aLoadData, PR_FALSE);
|
|
return rv;
|
|
}
|
|
|
|
// The parser insists on passing out a strong ref to the sheet it
|
|
// parsed. We don't care.
|
|
nsCOMPtr<nsICSSStyleSheet> dummySheet;
|
|
// Push our load data on the stack so any kids can pick it up
|
|
mParsingDatas.AppendElement(aLoadData);
|
|
nsCOMPtr<nsIURI> uri = aLoadData->mURI;
|
|
if (!uri) {
|
|
aLoadData->mSheet->GetURL(*getter_AddRefs(uri));
|
|
}
|
|
rv = parser->Parse(aStream, uri, *getter_AddRefs(dummySheet));
|
|
mParsingDatas.RemoveElementAt(mParsingDatas.Count() - 1);
|
|
RecycleParser(parser);
|
|
|
|
NS_ASSERTION(aLoadData->mPendingChildren == 0 || !aLoadData->mSyncLoad,
|
|
"Sync load has leftover pending children!");
|
|
|
|
if (aLoadData->mPendingChildren == 0) {
|
|
LOG((" No pending kids from parse"));
|
|
aCompleted = PR_TRUE;
|
|
if (!aLoadData->mURI) {
|
|
// inline sheet and we're all done with no kids, so we will not
|
|
// be blocking the parser
|
|
LOG((" Inline sheet with no pending kids; nulling out parser"));
|
|
aLoadData->mParserToUnblock = nsnull;
|
|
}
|
|
SheetComplete(aLoadData, PR_TRUE);
|
|
}
|
|
// Otherwise, the children are holding strong refs to the data and
|
|
// will call SheetComplete() on it when they complete.
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* SheetComplete is the do-it-all cleanup function. It removes the
|
|
* load data from the "loading" hashtable, adds the sheet to the
|
|
* "completed" hashtable, massages the XUL cache, handles siblings of
|
|
* the load data (other loads for the same URI, handles unblocking
|
|
* blocked parent loads as needed, and most importantly calls
|
|
* NS_RELEASE on the load data to destroy the whole mess.
|
|
*/
|
|
void
|
|
CSSLoaderImpl::SheetComplete(SheetLoadData* aLoadData, PRBool aSucceeded)
|
|
{
|
|
LOG(("CSSLoaderImpl::SheetComplete"));
|
|
NS_PRECONDITION(aLoadData, "Must have a load data!");
|
|
NS_PRECONDITION(aLoadData->mSheet, "Must have a sheet");
|
|
|
|
LOG(("Load completed: %d", aSucceeded));
|
|
|
|
// Twiddle the hashtables
|
|
if (aLoadData->mURI) {
|
|
LOG_URI(" Finished loading: '%s'", aLoadData->mURI);
|
|
// Remove the data from the list of loading datas
|
|
URLKey key(aLoadData->mURI);
|
|
if (aLoadData->mIsLoading) {
|
|
|
|
#ifdef DEBUG
|
|
SheetLoadData* loadingData =
|
|
#endif
|
|
NS_STATIC_CAST(SheetLoadData*, mLoadingDatas.Remove(&key));
|
|
NS_ASSERTION(loadingData == aLoadData, "Broken loading table");
|
|
aLoadData->mIsLoading = PR_FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
// This is a mess. If we have a document.write() that writes out
|
|
// two <link> elements pointing to the same url, we will actually
|
|
// end up blocking the same parser twice. This seems very wrong --
|
|
// if we blocked it the first time, why is more stuff getting
|
|
// written?? In any case, we only want to unblock it once.
|
|
// Otherwise we get icky things like crashes in layout... We need
|
|
// to stop blocking the parser. We really do.
|
|
PRBool seenParser = PR_FALSE;
|
|
|
|
// Go through and deal with the whole linked list.
|
|
SheetLoadData* data = aLoadData;
|
|
while (data) {
|
|
|
|
data->mSheet->SetModified(PR_FALSE); // it's clean
|
|
data->mSheet->SetComplete();
|
|
if (data->mObserver) {
|
|
data->mObserver->StyleSheetLoaded(data->mSheet, PR_TRUE);
|
|
}
|
|
|
|
if (data->mParserToUnblock) {
|
|
LOG(("Parser to unblock: %p", data->mParserToUnblock.get()));
|
|
if (!seenParser) {
|
|
LOG(("Unblocking parser: %p", data->mParserToUnblock.get()));
|
|
seenParser = PR_TRUE;
|
|
data->mParserToUnblock->ContinueParsing();
|
|
}
|
|
data->mParserToUnblock = nsnull; // drop the ref, just in case
|
|
}
|
|
|
|
NS_ASSERTION(!data->mParentData ||
|
|
data->mParentData->mPendingChildren != 0,
|
|
"Broken pending child count on our parent");
|
|
|
|
// If we have a parent, our parent is no longer being parsed, and
|
|
// we are the last pending child, then our load completion
|
|
// completes the parent too. Note that the parent _can_ still be
|
|
// being parsed (eg if the child (us) failed to open the channel
|
|
// or some such).
|
|
if (data->mParentData &&
|
|
--(data->mParentData->mPendingChildren) == 0 &&
|
|
mParsingDatas.IndexOf(data->mParentData) == -1) {
|
|
SheetComplete(data->mParentData, aSucceeded);
|
|
}
|
|
|
|
data = data->mNext;
|
|
}
|
|
|
|
// Now that it's marked complete, put the sheet in our cache
|
|
if (aSucceeded && aLoadData->mURI) {
|
|
#ifdef INCLUDE_XUL
|
|
if (IsChromeURI(aLoadData->mURI)) {
|
|
nsCOMPtr<nsIXULPrototypeCache> cache(do_GetService("@mozilla.org/xul/xul-prototype-cache;1"));
|
|
if (cache) {
|
|
PRBool enabled;
|
|
cache->GetEnabled(&enabled);
|
|
if (enabled) {
|
|
nsCOMPtr<nsICSSStyleSheet> sheet;
|
|
cache->GetStyleSheet(aLoadData->mURI, getter_AddRefs(sheet));
|
|
if (!sheet) {
|
|
LOG((" Putting sheet in XUL prototype cache"));
|
|
cache->PutStyleSheet(aLoadData->mSheet);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
#endif
|
|
URLKey key(aLoadData->mURI);
|
|
mCompleteSheets.Put(&key, aLoadData->mSheet);
|
|
#ifdef INCLUDE_XUL
|
|
}
|
|
#endif
|
|
}
|
|
|
|
NS_RELEASE(aLoadData); // this will release parents and siblings and all that
|
|
if (mLoadingDatas.Count() == 0 && mPendingDatas.Count() > 0) {
|
|
LOG((" No more loading sheets; starting alternates"));
|
|
mPendingDatas.Enumerate(StartAlternateLoads, this);
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::LoadInlineStyle(nsIContent* aElement,
|
|
nsIUnicharInputStream* aStream,
|
|
const nsAString& aTitle,
|
|
const nsAString& aMedia,
|
|
PRInt32 aDefaultNameSpaceID,
|
|
nsIParser* aParserToUnblock,
|
|
PRBool& aCompleted,
|
|
nsICSSLoaderObserver* aObserver)
|
|
{
|
|
LOG(("CSSLoaderImpl::LoadInlineStyle"));
|
|
NS_PRECONDITION(aStream, "Must have a stream to parse!");
|
|
NS_ASSERTION(mParsingDatas.Count() == 0, "We're in the middle of a parse?");
|
|
|
|
aCompleted = PR_TRUE;
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
NS_ENSURE_TRUE(mDocument, NS_ERROR_NOT_INITIALIZED);
|
|
|
|
nsCOMPtr<nsIStyleSheetLinkingElement> owningElement(do_QueryInterface(aElement));
|
|
NS_ASSERTION(owningElement, "Element is not a style linking element!");
|
|
|
|
StyleSheetState state;
|
|
nsCOMPtr<nsICSSStyleSheet> sheet;
|
|
nsresult rv = CreateSheet(nsnull, aDefaultNameSpaceID, PR_FALSE, state,
|
|
getter_AddRefs(sheet));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ASSERTION(state == eSheetNeedsParser,
|
|
"Inline sheets should not be cached");
|
|
|
|
rv = PrepareSheet(sheet, aTitle, aMedia);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = InsertSheetInDoc(sheet, aElement, mDocument);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
SheetLoadData* data = new SheetLoadData(this, aTitle, aParserToUnblock,
|
|
nsnull, sheet, owningElement,
|
|
aObserver);
|
|
|
|
if (!data) {
|
|
sheet->SetComplete();
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(data);
|
|
// Parse completion releases the load data
|
|
return ParseSheet(aStream, data, aCompleted);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::LoadStyleLink(nsIContent* aElement,
|
|
nsIURI* aURL,
|
|
const nsAString& aTitle,
|
|
const nsAString& aMedia,
|
|
PRInt32 aDefaultNameSpaceID,
|
|
nsIParser* aParserToUnblock,
|
|
PRBool& aCompleted,
|
|
nsICSSLoaderObserver* aObserver)
|
|
{
|
|
LOG(("CSSLoaderImpl::LoadStyleLink"));
|
|
NS_PRECONDITION(aURL, "Must have URL to load");
|
|
NS_ASSERTION(mParsingDatas.Count() == 0, "We're in the middle of a parse?");
|
|
|
|
LOG_URI(" Link uri: '%s'", aURL);
|
|
|
|
aCompleted = PR_TRUE;
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
NS_ENSURE_TRUE(mDocument, NS_ERROR_NOT_INITIALIZED);
|
|
|
|
//-- Make sure this page is allowed to load this URL
|
|
nsresult rv;
|
|
nsCOMPtr<nsIScriptSecurityManager> secMan =
|
|
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
|
|
if (NS_FAILED(rv)) return rv;
|
|
nsCOMPtr<nsIURI> docURI;
|
|
rv = mDocument->GetDocumentURL(getter_AddRefs(docURI));
|
|
if (NS_FAILED(rv) || !docURI) return NS_ERROR_FAILURE;
|
|
rv = secMan->CheckLoadURI(docURI, aURL, nsIScriptSecurityManager::ALLOW_CHROME);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
LOG((" Passed security check"));
|
|
|
|
StyleSheetState state;
|
|
nsCOMPtr<nsICSSStyleSheet> sheet;
|
|
rv = CreateSheet(aURL, aDefaultNameSpaceID, PR_FALSE, state,
|
|
getter_AddRefs(sheet));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = PrepareSheet(sheet, aTitle, aMedia);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = InsertSheetInDoc(sheet, aElement, mDocument);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (state == eSheetComplete) {
|
|
LOG((" Sheet already complete"));
|
|
// We're completely done; this sheet is fully loaded, clean, and so forth
|
|
if (aObserver) {
|
|
aObserver->StyleSheetLoaded(sheet, PR_TRUE);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIStyleSheetLinkingElement> owningElement(do_QueryInterface(aElement));
|
|
|
|
// Now we need to actually load it
|
|
SheetLoadData* data = new SheetLoadData(this, aTitle, aParserToUnblock, aURL,
|
|
sheet, owningElement, aObserver);
|
|
if (!data) {
|
|
sheet->SetComplete();
|
|
if (aObserver) {
|
|
aObserver->StyleSheetLoaded(sheet, PR_TRUE);
|
|
}
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(data);
|
|
|
|
// Caller gets to wait for the sheet to load.
|
|
aCompleted = PR_FALSE;
|
|
|
|
// If we have to parse and it's an alternate non-inline, defer it
|
|
if (aURL && state == eSheetNeedsParser && mLoadingDatas.Count() != 0 &&
|
|
IsAlternate(aTitle)) {
|
|
LOG((" Deferring alternate sheet load"));
|
|
URLKey key(aURL);
|
|
mPendingDatas.Put(&key, data);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Load completion will free the data
|
|
return LoadSheet(data, state);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::LoadChildSheet(nsICSSStyleSheet* aParentSheet,
|
|
nsIURI* aURL,
|
|
const nsAString& aMedia,
|
|
PRInt32 aDefaultNameSpaceID,
|
|
nsICSSImportRule* aParentRule)
|
|
{
|
|
LOG(("CSSLoaderImpl::LoadChildSheet"));
|
|
NS_PRECONDITION(aURL, "Must have a URI to load");
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
LOG_URI(" Child uri: '%s'", aURL);
|
|
|
|
//-- Make sure this page is allowed to load this URL
|
|
nsresult rv;
|
|
nsCOMPtr<nsIScriptSecurityManager> secMan =
|
|
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
|
|
if (NS_FAILED(rv)) return rv;
|
|
nsCOMPtr<nsIURI> sheetURI;
|
|
rv = aParentSheet->GetURL(*getter_AddRefs(sheetURI));
|
|
if (NS_FAILED(rv) || !sheetURI) return NS_ERROR_FAILURE;
|
|
rv = secMan->CheckLoadURI(sheetURI, aURL, nsIScriptSecurityManager::ALLOW_CHROME);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
LOG((" Passed security check"));
|
|
|
|
SheetLoadData* parentData = nsnull;
|
|
nsCOMPtr<nsICSSLoaderObserver> observer;
|
|
|
|
PRInt32 count = mParsingDatas.Count();
|
|
if (count > 0) {
|
|
LOG((" Have a parent load"));
|
|
parentData = NS_STATIC_CAST(SheetLoadData*,
|
|
mParsingDatas.ElementAt(count - 1));
|
|
// Check for cycles
|
|
SheetLoadData* data = parentData;
|
|
while (data && data->mURI) {
|
|
PRBool equal;
|
|
if (NS_SUCCEEDED(data->mURI->Equals(aURL, &equal)) && equal) {
|
|
// Houston, we have a loop, blow off this child and pretend this never
|
|
// happened
|
|
LOG_ERROR((" @import cycle detected, dropping load"));
|
|
return NS_OK;
|
|
}
|
|
data = data->mParentData;
|
|
}
|
|
|
|
NS_ASSERTION(parentData->mSheet = aParentSheet,
|
|
"Unexpected call to LoadChildSheet");
|
|
} else {
|
|
LOG((" No parent load; must be CSSOM"));
|
|
// No parent load data, so the sheet will need to be notified when
|
|
// we finish, if it can be, if we do the load asynchronously.
|
|
observer = do_QueryInterface(aParentSheet);
|
|
}
|
|
|
|
// Now that we know it's safe to load this (passes security check and not a
|
|
// loop) do so
|
|
nsCOMPtr<nsICSSStyleSheet> sheet;
|
|
StyleSheetState state;
|
|
rv = CreateSheet(aURL, aDefaultNameSpaceID,
|
|
parentData ? parentData->mSyncLoad : PR_FALSE,
|
|
state, getter_AddRefs(sheet));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = PrepareSheet(sheet, NS_LITERAL_STRING(""), aMedia);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = InsertChildSheet(sheet, aParentSheet, aParentRule);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (state == eSheetComplete) {
|
|
LOG((" Sheet already complete"));
|
|
// We're completely done. No need to notify, even, since the
|
|
// @import rule addition/modification will trigger the right style
|
|
// changes automatically.
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
SheetLoadData* data = new SheetLoadData(this, aURL, sheet, parentData,
|
|
observer);
|
|
|
|
if (!data) {
|
|
sheet->SetComplete();
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(data);
|
|
|
|
// Load completion will release the data
|
|
return LoadSheet(data, state);
|
|
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::LoadAgentSheet(nsIURI* aURL,
|
|
nsICSSStyleSheet** aSheet)
|
|
{
|
|
LOG(("CSSLoaderImpl::LoadAgentSheet synchronous"));
|
|
return InternalLoadAgentSheet(aURL, aSheet, nsnull);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::LoadAgentSheet(nsIURI* aURL,
|
|
nsICSSLoaderObserver* aObserver)
|
|
{
|
|
LOG(("CSSLoaderImpl::LoadAgentSheet asynchronous"));
|
|
return InternalLoadAgentSheet(aURL, nsnull, aObserver);
|
|
}
|
|
|
|
nsresult
|
|
CSSLoaderImpl::InternalLoadAgentSheet(nsIURI* aURL,
|
|
nsICSSStyleSheet** aSheet,
|
|
nsICSSLoaderObserver* aObserver)
|
|
{
|
|
NS_PRECONDITION(aURL, "Must have a URI to load");
|
|
NS_PRECONDITION((!aSheet || !aObserver) && (aSheet || aObserver),
|
|
"One or the other please, at most one");
|
|
NS_ASSERTION(mParsingDatas.Count() == 0, "We're in the middle of a parse?");
|
|
|
|
LOG_URI(" Agent uri: '%s'", aURL);
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
StyleSheetState state;
|
|
nsCOMPtr<nsICSSStyleSheet> sheet;
|
|
PRBool syncLoad = (aObserver == nsnull);
|
|
|
|
nsresult rv = CreateSheet(aURL, kNameSpaceID_Unknown, syncLoad, state,
|
|
getter_AddRefs(sheet));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
NS_NAMED_LITERAL_STRING(empty, "");
|
|
rv = PrepareSheet(sheet, empty, empty);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (aSheet) {
|
|
*aSheet = nsnull;
|
|
}
|
|
|
|
if (state == eSheetComplete) {
|
|
LOG((" Sheet already complete"));
|
|
if (aSheet) {
|
|
*aSheet = sheet;
|
|
NS_ADDREF(*aSheet);
|
|
} else {
|
|
aObserver->StyleSheetLoaded(sheet, PR_TRUE);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
SheetLoadData* data = new SheetLoadData(this, aURL, sheet, syncLoad, aObserver);
|
|
|
|
if (!data) {
|
|
sheet->SetComplete();
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(data);
|
|
rv = LoadSheet(data, state);
|
|
|
|
if (NS_SUCCEEDED(rv) && aSheet) {
|
|
*aSheet = sheet;
|
|
NS_ADDREF(*aSheet);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult NS_NewCSSLoader(nsIDocument* aDocument, nsICSSLoader** aLoader)
|
|
{
|
|
CSSLoaderImpl* it = new CSSLoaderImpl();
|
|
|
|
NS_ENSURE_TRUE(it, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
it->Init(aDocument);
|
|
return CallQueryInterface(it, aLoader);
|
|
}
|
|
|
|
nsresult NS_NewCSSLoader(nsICSSLoader** aLoader)
|
|
{
|
|
CSSLoaderImpl* it = new CSSLoaderImpl();
|
|
|
|
NS_ENSURE_TRUE(it, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
return CallQueryInterface(it, aLoader);
|
|
}
|
|
|
|
PR_STATIC_CALLBACK(PRIntn)
|
|
StopLoadingSheetCallback(nsHashKey* aKey, void* aData, void* aClosure)
|
|
{
|
|
NS_PRECONDITION(aData, "Must have a data!");
|
|
NS_PRECONDITION(aClosure, "Must have a loader");
|
|
|
|
SheetLoadData* data = NS_STATIC_CAST(SheetLoadData*, aData);
|
|
CSSLoaderImpl* loader = NS_STATIC_CAST(CSSLoaderImpl*, aClosure);
|
|
|
|
data->mIsLoading = PR_FALSE; // we will handle the removal right here
|
|
data->mIsCancelled = PR_TRUE;
|
|
|
|
loader->SheetComplete(data, PR_FALSE);
|
|
|
|
return kHashEnumerateRemove;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::Stop()
|
|
{
|
|
if (mLoadingDatas.Count() > 0) {
|
|
mLoadingDatas.Enumerate(StopLoadingSheetCallback, this);
|
|
}
|
|
if (mPendingDatas.Count() > 0) {
|
|
mPendingDatas.Enumerate(StopLoadingSheetCallback, this);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::StopLoadingSheet(nsIURI* aURL)
|
|
{
|
|
NS_ENSURE_TRUE(aURL, NS_ERROR_NULL_POINTER);
|
|
if (mLoadingDatas.Count() > 0 || mPendingDatas.Count() > 0) {
|
|
URLKey key(aURL);
|
|
SheetLoadData* loadData =
|
|
NS_STATIC_CAST(SheetLoadData*, mLoadingDatas.Get(&key));
|
|
if (!loadData) {
|
|
loadData = NS_STATIC_CAST(SheetLoadData*, mPendingDatas.Get(&key));
|
|
if (loadData) {
|
|
// have to remove from mPendingDatas ourselves, since
|
|
// SheetComplete won't do that.
|
|
mPendingDatas.Remove(&key);
|
|
}
|
|
}
|
|
|
|
if (loadData) {
|
|
loadData->mIsCancelled = PR_TRUE;
|
|
SheetComplete(loadData, PR_FALSE);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::GetEnabled(PRBool *aEnabled)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aEnabled);
|
|
*aEnabled = mEnabled;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CSSLoaderImpl::SetEnabled(PRBool aEnabled)
|
|
{
|
|
mEnabled = aEnabled;
|
|
return NS_OK;
|
|
}
|