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Make the parser recycling list in the loader a class static. Bug 190658,

Browse Source 
r=sicking, sr=peterv
This commit is contained in:
bzbarsky%mit.edu 2003-02-22 19:36:32 +00:00
parent 3f21e0e694
commit 9c70577820
5 changed files with 798 additions and 692 deletions
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375
content/html/style/src/nsCSSLoader.cpp
View File

@ -27,25 +27,16 @@
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
#include "nsICSSLoader.h"
#include "nsICSSLoaderObserver.h"
#include "nsICSSParser.h"
#include "nsICSSStyleSheet.h"
#include "nsIParser.h"
#include "nsIContent.h"
#include "nsIDOMNode.h"
#include "nsIStyleSheetLinkingElement.h"
#include "nsIDocument.h"
#include "nsINameSpaceManager.h"
#include "nsIUnicharStreamLoader.h"
#include "nsIUnicharInputStream.h"
#include "nsIConverterInputStream.h"
#include "nsICharsetAlias.h"
#include "nsUnicharUtils.h"
#include "nsHashtable.h"
#include "nsIURL.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsNetUtil.h"
#include "nsCRT.h"
@ -59,6 +50,7 @@
#include "nsIStringBundle.h"
#include "nsMimeTypes.h"
#include "nsIAtom.h"
#include "nsCSSLoader.h"
#ifdef INCLUDE_XUL
#include "nsIXULPrototypeCache.h"
@ -106,195 +98,6 @@ static PRLogModuleInfo *gLoaderLog = PR_NewLogModule("nsCSSLoader");
static NS_DEFINE_CID(kCStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
class CSSLoaderImpl;
/**
* OVERALL ARCHITECTURE
*
* The CSS Loader gets requests to load various sorts of style sheets:
* inline style from <style> elements, linked style, @import-ed child
* sheets, agent sheets. The loader handles the following tasks:
*
* 1) Creation of the actual style sheet objects: CreateSheet()
* 2) setting of the right media, title, enabled state, etc on the
* sheet: PrepareSheet()
* 3) Insertion of the sheet in the proper cascade order:
* InsertSheetInDoc() and InsertChildSheet()
* 4) Load of the sheet: LoadSheet()
* 5) Parsing of the sheet: ParseSheet()
* 6) Cleanup: SheetComplete()
*
* The detailed documentation for these functions is found with the
* function implementations.
*
* The following helper objects are used:
* A) URLKey -- a nsHashKey implementation that uses an nsIURI as the key
* B) SheetLoadData -- a small class that is used to store all the
* information needed for the loading of a sheet;
* this class handles listening for the stream
* loader completion and also handles charset
* determination.
*/
/************************************
* URLKey class used for hashtables *
************************************/
MOZ_DECL_CTOR_COUNTER(URLKey)
class URLKey: public nsHashKey {
public:
URLKey(nsIURI* aURL)
: mURL(aURL)
{
MOZ_COUNT_CTOR(URLKey);
mHashValue = 0;
nsCAutoString spec;
mURL->GetSpec(spec);
if (!spec.IsEmpty()) {
mHashValue = nsCRT::HashCode(spec.get());
}
}
URLKey(const URLKey& aKey)
: mURL(aKey.mURL),
mHashValue(aKey.mHashValue)
{
MOZ_COUNT_CTOR(URLKey);
}
virtual ~URLKey(void)
{
MOZ_COUNT_DTOR(URLKey);
}
virtual PRUint32 HashCode(void) const
{
return mHashValue;
}
virtual PRBool Equals(const nsHashKey* aKey) const
{
URLKey* key = (URLKey*)aKey;
PRBool equals = PR_FALSE;
nsresult result = mURL->Equals(key->mURL, &equals);
return (NS_SUCCEEDED(result) && equals);
}
virtual nsHashKey *Clone(void) const
{
return new URLKey(*this);
}
nsCOMPtr<nsIURI> mURL;
PRUint32 mHashValue;
};
/*********************************************
* Data needed to properly load a stylesheet *
*********************************************/
class SheetLoadData : public nsIUnicharStreamLoaderObserver
{
public:
virtual ~SheetLoadData(void);
// Data for loading a sheet linked from a document
SheetLoadData(CSSLoaderImpl* aLoader,
const nsAString& aTitle,
nsIParser* aParserToUnblock,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
nsIStyleSheetLinkingElement* aOwningElement,
nsICSSLoaderObserver* aObserver);
// Data for loading a sheet linked from an @import rule
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
SheetLoadData* aParentData,
nsICSSLoaderObserver* aObserver);
// Data for loading an agent sheet
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
PRBool aSyncLoad,
nsICSSLoaderObserver* aObserver);
NS_DECL_ISUPPORTS
NS_DECL_NSIUNICHARSTREAMLOADEROBSERVER
// Hold a ref to the CSSLoader so we can call back to it to let it
// know the load finished
CSSLoaderImpl* mLoader; // strong ref
// Title needed to pull datas out of the pending datas table when
// the preferred title is changed
nsString mTitle;
// Parser to be told to continue parsing once the load completes
nsCOMPtr<nsIParser> mParserToUnblock;
// URI we're loading. Null for inline sheets
nsCOMPtr<nsIURI> mURI;
// The sheet we're loading data for
nsCOMPtr<nsICSSStyleSheet> mSheet;
// Linked list of datas for the same URI as us
SheetLoadData* mNext; // strong ref
// Load data for the sheet that @import-ed us if we were @import-ed
// during the parse
SheetLoadData* mParentData; // strong ref
// Number of sheets we @import-ed that are still loading
PRUint32 mPendingChildren;
// mSyncLoad is true when the load needs to be synchronous -- right
// now only for LoadAgentSheet with no observer
PRPackedBool mSyncLoad;
// mIsAgent is true if the load was triggered by LoadAgentSheet or
// an @import from an agent sheet. Agent loads can proceed even if
// we have no document.
PRPackedBool mIsAgent;
// mIsLoading is true from the moment we are placed in the loader's
// "loading datas" table (right after the async channel is opened)
// to the moment we are removed from said table (due to the load
// completing or being cancelled).
PRPackedBool mIsLoading; // Set once the data is in the "loading" table
// mIsCancelled is set to true when a sheet load is stopped by
// Stop() or StopLoadingSheet(). SheetLoadData::OnStreamComplete()
// checks this to avoid parsing sheets that have been cancelled and
// such.
PRPackedBool mIsCancelled;
// This is the element that imported the sheet. Needed to get the
// charset set on it.
nsCOMPtr<nsIStyleSheetLinkingElement> mOwningElement;
// The observer that wishes to be notified of load completion
nsCOMPtr<nsICSSLoaderObserver> mObserver;
};
NS_IMPL_ISUPPORTS1(SheetLoadData, nsIUnicharStreamLoaderObserver);
/***********************************************************************
* Enum that describes the state of the sheet returned by CreateSheet. *
***********************************************************************/
enum StyleSheetState {
eSheetStateUnknown = 0,
eSheetNeedsParser,
eSheetPending,
eSheetLoading,
eSheetComplete
};
// And some convenience strings...
#ifdef PR_LOGGING
static const char* const gStateStrings[] = {
@ -306,144 +109,10 @@ static const char* const gStateStrings[] = {
};
#endif
/**********************
* Loader Declaration *
**********************/
class CSSLoaderImpl : public nsICSSLoader
{
public:
CSSLoaderImpl(void);
virtual ~CSSLoaderImpl(void);
NS_DECL_ISUPPORTS
// nsICSSLoader methods
NS_IMETHOD Init(nsIDocument* aDocument);
NS_IMETHOD DropDocumentReference(void);
NS_IMETHOD SetCaseSensitive(PRBool aCaseSensitive);
NS_IMETHOD SetCompatibilityMode(nsCompatibility aCompatMode);
NS_IMETHOD SetPreferredSheet(const nsAString& aTitle);
NS_IMETHOD GetParserFor(nsICSSStyleSheet* aSheet,
nsICSSParser** aParser);
NS_IMETHOD RecycleParser(nsICSSParser* aParser);
NS_IMETHOD LoadInlineStyle(nsIContent* aElement,
nsIUnicharInputStream* aIn,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadStyleLink(nsIContent* aElement,
nsIURI* aURL,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadChildSheet(nsICSSStyleSheet* aParentSheet,
nsIURI* aURL,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsICSSImportRule* aRule);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSStyleSheet** aSheet);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSLoaderObserver* aObserver);
// stop loading all sheets
NS_IMETHOD Stop(void);
// stop loading one sheet
NS_IMETHOD StopLoadingSheet(nsIURI* aURL);
/**
* Is the loader enabled or not.
* When disabled, processing of new styles is disabled and an attempt
* to do so will fail with a return code of
* NS_ERROR_NOT_AVAILABLE. Note that this DOES NOT disable
* currently loading styles or already processed styles.
*/
NS_IMETHOD GetEnabled(PRBool *aEnabled);
NS_IMETHOD SetEnabled(PRBool aEnabled);
// local helper methods (some are public for access from statics)
PRBool IsAlternate(const nsAString& aTitle);
private:
nsresult CreateSheet(nsIURI* aURI,
PRUint32 aDefaultNameSpaceID,
PRBool aSyncLoad,
StyleSheetState& aSheetState,
nsICSSStyleSheet** aSheet);
nsresult PrepareSheet(nsICSSStyleSheet* aSheet,
const nsAString& aTitle,
const nsAString& aMedia);
nsresult InsertSheetInDoc(nsICSSStyleSheet* aSheet,
nsIContent* aLinkingElement,
nsIDocument* aDocument);
nsresult InsertChildSheet(nsICSSStyleSheet* aSheet,
nsICSSStyleSheet* aParentSheet,
nsICSSImportRule* aParentRule);
nsresult InternalLoadAgentSheet(nsIURI* aURL,
nsICSSStyleSheet** aSheet,
nsICSSLoaderObserver* aObserver);
public:
nsresult LoadSheet(SheetLoadData* aLoadData, StyleSheetState aSheetState);
protected:
friend class SheetLoadData;
// Protected functions and members are ones that SheetLoadData needs
// access to
nsresult ParseSheet(nsIUnicharInputStream* aStream,
SheetLoadData* aLoadData,
PRBool& aCompleted);
public:
void SheetComplete(SheetLoadData* aLoadData, PRBool aSucceeded);
protected:
// the load data needs access to the document...
nsIDocument* mDocument; // the document we live for
#ifdef DEBUG
PRPackedBool mSyncCallback;
#endif
private:
PRPackedBool mCaseSensitive; // is document CSS case sensitive
PRPackedBool mEnabled; // is enabled to load new styles
nsCompatibility mCompatMode;
nsString mPreferredSheet; // title of preferred sheet
nsCOMArray<nsICSSParser> mParsers; // array of CSS parsers
nsSupportsHashtable mCompleteSheets;
nsHashtable mLoadingDatas; // weak refs
nsHashtable mPendingDatas; // weak refs
// We're not likely to have many levels of @import... But likely to have
// some. Allocate some storage, what the hell.
nsAutoVoidArray mParsingDatas;
};
/********************************
* SheetLoadData implementation *
********************************/
NS_IMPL_ISUPPORTS1(SheetLoadData, nsIUnicharStreamLoaderObserver);
SheetLoadData::SheetLoadData(CSSLoaderImpl* aLoader,
const nsAString& aTitle,
@ -537,6 +206,9 @@ SheetLoadData::~SheetLoadData()
* Loader Implementation *
*************************/
// static
nsCOMArray<nsICSSParser>* CSSLoaderImpl::gParsers = nsnull;
CSSLoaderImpl::CSSLoaderImpl(void)
: mDocument(nsnull),
mCaseSensitive(PR_FALSE),
@ -555,6 +227,12 @@ CSSLoaderImpl::~CSSLoaderImpl(void)
NS_IMPL_ISUPPORTS1(CSSLoaderImpl, nsICSSLoader)
void
CSSLoaderImpl::Shutdown()
{
delete gParsers;
}
NS_IMETHODIMP
CSSLoaderImpl::Init(nsIDocument* aDocument)
{
@ -632,21 +310,25 @@ NS_IMETHODIMP
CSSLoaderImpl::GetParserFor(nsICSSStyleSheet* aSheet,
nsICSSParser** aParser)
{
NS_ASSERTION(aParser, "null pointer");
if (! aParser) {
return NS_ERROR_NULL_POINTER;
NS_PRECONDITION(aParser, "Null out param");
*aParser = nsnull;
if (!gParsers) {
gParsers = new nsCOMArray<nsICSSParser>;
if (!gParsers) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
PRInt32 count = gParsers->Count();
if (0 < count--) {
*aParser = gParsers->ObjectAt(count);
NS_ADDREF(*aParser);
gParsers->RemoveObjectAt(count);
}
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);
}
@ -666,8 +348,9 @@ NS_IMETHODIMP
CSSLoaderImpl::RecycleParser(nsICSSParser* aParser)
{
NS_PRECONDITION(aParser, "Recycle only good parsers, please");
NS_ENSURE_TRUE(gParsers, NS_ERROR_UNEXPECTED);
if (!mParsers.AppendObject(aParser)) {
if (!gParsers->AppendObject(aParser)) {
return NS_ERROR_FAILURE;
}

369
content/html/style/src/nsCSSLoader.h Normal file
View File

@ -0,0 +1,369 @@
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (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/NPL/
*
* 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 Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Boris Zbarsky <bzbarsky@mit.edu>
*
* This Original Code has been modified by IBM Corporation. Modifications made by IBM
* described herein are Copyright (c) International Business Machines Corporation, 2000.
* Modifications to Mozilla code or documentation identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
#ifndef nsCSSLoader_h__
#define nsCSSLoader_h__
class CSSLoaderImpl;
#include "nsIURI.h"
#include "nsIParser.h"
#include "nsICSSStyleSheet.h"
#include "nsIStyleSheetLinkingElement.h"
#include "nsICSSLoaderObserver.h"
#include "nsICSSLoader.h"
#include "nsICSSParser.h"
#include "nsIUnicharStreamLoader.h"
/**
* OVERALL ARCHITECTURE
*
* The CSS Loader gets requests to load various sorts of style sheets:
* inline style from <style> elements, linked style, @import-ed child
* sheets, agent sheets. The loader handles the following tasks:
*
* 1) Creation of the actual style sheet objects: CreateSheet()
* 2) setting of the right media, title, enabled state, etc on the
* sheet: PrepareSheet()
* 3) Insertion of the sheet in the proper cascade order:
* InsertSheetInDoc() and InsertChildSheet()
* 4) Load of the sheet: LoadSheet()
* 5) Parsing of the sheet: ParseSheet()
* 6) Cleanup: SheetComplete()
*
* The detailed documentation for these functions is found with the
* function implementations.
*
* The following helper objects are used:
* A) URLKey -- a nsHashKey implementation that uses an nsIURI as the key
* B) SheetLoadData -- a small class that is used to store all the
* information needed for the loading of a sheet;
* this class handles listening for the stream
* loader completion and also handles charset
* determination.
*/
/************************************
* URLKey class used for hashtables *
************************************/
MOZ_DECL_CTOR_COUNTER(URLKey)
class URLKey: public nsHashKey {
public:
URLKey(nsIURI* aURL)
: mURL(aURL)
{
MOZ_COUNT_CTOR(URLKey);
mHashValue = 0;
nsCAutoString spec;
mURL->GetSpec(spec);
if (!spec.IsEmpty()) {
mHashValue = nsCRT::HashCode(spec.get());
}
}
URLKey(const URLKey& aKey)
: mURL(aKey.mURL),
mHashValue(aKey.mHashValue)
{
MOZ_COUNT_CTOR(URLKey);
}
virtual ~URLKey(void)
{
MOZ_COUNT_DTOR(URLKey);
}
virtual PRUint32 HashCode(void) const
{
return mHashValue;
}
virtual PRBool Equals(const nsHashKey* aKey) const
{
URLKey* key = (URLKey*)aKey;
PRBool equals = PR_FALSE;
nsresult result = mURL->Equals(key->mURL, &equals);
return (NS_SUCCEEDED(result) && equals);
}
virtual nsHashKey *Clone(void) const
{
return new URLKey(*this);
}
nsCOMPtr<nsIURI> mURL;
PRUint32 mHashValue;
};
/*********************************************
* Data needed to properly load a stylesheet *
*********************************************/
class SheetLoadData : public nsIUnicharStreamLoaderObserver
{
public:
virtual ~SheetLoadData(void);
// Data for loading a sheet linked from a document
SheetLoadData(CSSLoaderImpl* aLoader,
const nsAString& aTitle,
nsIParser* aParserToUnblock,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
nsIStyleSheetLinkingElement* aOwningElement,
nsICSSLoaderObserver* aObserver);
// Data for loading a sheet linked from an @import rule
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
SheetLoadData* aParentData,
nsICSSLoaderObserver* aObserver);
// Data for loading an agent sheet
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
PRBool aSyncLoad,
nsICSSLoaderObserver* aObserver);
NS_DECL_ISUPPORTS
NS_DECL_NSIUNICHARSTREAMLOADEROBSERVER
// Hold a ref to the CSSLoader so we can call back to it to let it
// know the load finished
CSSLoaderImpl* mLoader; // strong ref
// Title needed to pull datas out of the pending datas table when
// the preferred title is changed
nsString mTitle;
// Parser to be told to continue parsing once the load completes
nsCOMPtr<nsIParser> mParserToUnblock;
// URI we're loading. Null for inline sheets
nsCOMPtr<nsIURI> mURI;
// The sheet we're loading data for
nsCOMPtr<nsICSSStyleSheet> mSheet;
// Linked list of datas for the same URI as us
SheetLoadData* mNext; // strong ref
// Load data for the sheet that @import-ed us if we were @import-ed
// during the parse
SheetLoadData* mParentData; // strong ref
// Number of sheets we @import-ed that are still loading
PRUint32 mPendingChildren;
// mSyncLoad is true when the load needs to be synchronous -- right
// now only for LoadAgentSheet with no observer
PRPackedBool mSyncLoad;
// mIsAgent is true if the load was triggered by LoadAgentSheet or
// an @import from an agent sheet. Agent loads can proceed even if
// we have no document.
PRPackedBool mIsAgent;
// mIsLoading is true from the moment we are placed in the loader's
// "loading datas" table (right after the async channel is opened)
// to the moment we are removed from said table (due to the load
// completing or being cancelled).
PRPackedBool mIsLoading; // Set once the data is in the "loading" table
// mIsCancelled is set to true when a sheet load is stopped by
// Stop() or StopLoadingSheet(). SheetLoadData::OnStreamComplete()
// checks this to avoid parsing sheets that have been cancelled and
// such.
PRPackedBool mIsCancelled;
// This is the element that imported the sheet. Needed to get the
// charset set on it.
nsCOMPtr<nsIStyleSheetLinkingElement> mOwningElement;
// The observer that wishes to be notified of load completion
nsCOMPtr<nsICSSLoaderObserver> mObserver;
};
/***********************************************************************
* Enum that describes the state of the sheet returned by CreateSheet. *
***********************************************************************/
enum StyleSheetState {
eSheetStateUnknown = 0,
eSheetNeedsParser,
eSheetPending,
eSheetLoading,
eSheetComplete
};
/**********************
* Loader Declaration *
**********************/
class CSSLoaderImpl : public nsICSSLoader
{
public:
CSSLoaderImpl(void);
virtual ~CSSLoaderImpl(void);
NS_DECL_ISUPPORTS
static void Shutdown(); // called at app shutdown
// nsICSSLoader methods
NS_IMETHOD Init(nsIDocument* aDocument);
NS_IMETHOD DropDocumentReference(void);
NS_IMETHOD SetCaseSensitive(PRBool aCaseSensitive);
NS_IMETHOD SetCompatibilityMode(nsCompatibility aCompatMode);
NS_IMETHOD SetPreferredSheet(const nsAString& aTitle);
NS_IMETHOD GetParserFor(nsICSSStyleSheet* aSheet,
nsICSSParser** aParser);
NS_IMETHOD RecycleParser(nsICSSParser* aParser);
NS_IMETHOD LoadInlineStyle(nsIContent* aElement,
nsIUnicharInputStream* aIn,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadStyleLink(nsIContent* aElement,
nsIURI* aURL,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadChildSheet(nsICSSStyleSheet* aParentSheet,
nsIURI* aURL,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsICSSImportRule* aRule);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSStyleSheet** aSheet);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSLoaderObserver* aObserver);
// stop loading all sheets
NS_IMETHOD Stop(void);
// stop loading one sheet
NS_IMETHOD StopLoadingSheet(nsIURI* aURL);
/**
* Is the loader enabled or not.
* When disabled, processing of new styles is disabled and an attempt
* to do so will fail with a return code of
* NS_ERROR_NOT_AVAILABLE. Note that this DOES NOT disable
* currently loading styles or already processed styles.
*/
NS_IMETHOD GetEnabled(PRBool *aEnabled);
NS_IMETHOD SetEnabled(PRBool aEnabled);
// local helper methods (some are public for access from statics)
PRBool IsAlternate(const nsAString& aTitle);
private:
nsresult CreateSheet(nsIURI* aURI,
PRUint32 aDefaultNameSpaceID,
PRBool aSyncLoad,
StyleSheetState& aSheetState,
nsICSSStyleSheet** aSheet);
nsresult PrepareSheet(nsICSSStyleSheet* aSheet,
const nsAString& aTitle,
const nsAString& aMedia);
nsresult InsertSheetInDoc(nsICSSStyleSheet* aSheet,
nsIContent* aLinkingElement,
nsIDocument* aDocument);
nsresult InsertChildSheet(nsICSSStyleSheet* aSheet,
nsICSSStyleSheet* aParentSheet,
nsICSSImportRule* aParentRule);
nsresult InternalLoadAgentSheet(nsIURI* aURL,
nsICSSStyleSheet** aSheet,
nsICSSLoaderObserver* aObserver);
public:
nsresult LoadSheet(SheetLoadData* aLoadData, StyleSheetState aSheetState);
protected:
friend class SheetLoadData;
// Protected functions and members are ones that SheetLoadData needs
// access to
nsresult ParseSheet(nsIUnicharInputStream* aStream,
SheetLoadData* aLoadData,
PRBool& aCompleted);
public:
void SheetComplete(SheetLoadData* aLoadData, PRBool aSucceeded);
static nsCOMArray<nsICSSParser>* gParsers; // array of idle CSS parsers
protected:
// the load data needs access to the document...
nsIDocument* mDocument; // the document we live for
#ifdef DEBUG
PRPackedBool mSyncCallback;
#endif
private:
PRPackedBool mCaseSensitive; // is document CSS case sensitive
PRPackedBool mEnabled; // is enabled to load new styles
nsCompatibility mCompatMode;
nsString mPreferredSheet; // title of preferred sheet
nsSupportsHashtable mCompleteSheets;
nsHashtable mLoadingDatas; // weak refs
nsHashtable mPendingDatas; // weak refs
// We're not likely to have many levels of @import... But likely to have
// some. Allocate some storage, what the hell.
nsAutoVoidArray mParsingDatas;
};
#endif // nsCSSLoader_h__

2
layout/build/nsLayoutModule.cpp
View File

@ -126,6 +126,7 @@
#include "nsIPrintContext.h"
#include "nsIAutoCopy.h"
#include "nsIPrintPreviewContext.h"
#include "nsCSSLoader.h"
class nsIDocumentLoaderFactory;
@ -268,6 +269,7 @@ Shutdown(nsIModule* aSelf)
nsEventListenerManager::Shutdown();
nsContentList::Shutdown();
nsComputedDOMStyle::Shutdown();
CSSLoaderImpl::Shutdown();
// Release all of our atoms
nsColorNames::ReleaseTable();

375
layout/style/nsCSSLoader.cpp
View File

@ -27,25 +27,16 @@
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
#include "nsICSSLoader.h"
#include "nsICSSLoaderObserver.h"
#include "nsICSSParser.h"
#include "nsICSSStyleSheet.h"
#include "nsIParser.h"
#include "nsIContent.h"
#include "nsIDOMNode.h"
#include "nsIStyleSheetLinkingElement.h"
#include "nsIDocument.h"
#include "nsINameSpaceManager.h"
#include "nsIUnicharStreamLoader.h"
#include "nsIUnicharInputStream.h"
#include "nsIConverterInputStream.h"
#include "nsICharsetAlias.h"
#include "nsUnicharUtils.h"
#include "nsHashtable.h"
#include "nsIURL.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsNetUtil.h"
#include "nsCRT.h"
@ -59,6 +50,7 @@
#include "nsIStringBundle.h"
#include "nsMimeTypes.h"
#include "nsIAtom.h"
#include "nsCSSLoader.h"
#ifdef INCLUDE_XUL
#include "nsIXULPrototypeCache.h"
@ -106,195 +98,6 @@ static PRLogModuleInfo *gLoaderLog = PR_NewLogModule("nsCSSLoader");
static NS_DEFINE_CID(kCStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
class CSSLoaderImpl;
/**
* OVERALL ARCHITECTURE
*
* The CSS Loader gets requests to load various sorts of style sheets:
* inline style from <style> elements, linked style, @import-ed child
* sheets, agent sheets. The loader handles the following tasks:
*
* 1) Creation of the actual style sheet objects: CreateSheet()
* 2) setting of the right media, title, enabled state, etc on the
* sheet: PrepareSheet()
* 3) Insertion of the sheet in the proper cascade order:
* InsertSheetInDoc() and InsertChildSheet()
* 4) Load of the sheet: LoadSheet()
* 5) Parsing of the sheet: ParseSheet()
* 6) Cleanup: SheetComplete()
*
* The detailed documentation for these functions is found with the
* function implementations.
*
* The following helper objects are used:
* A) URLKey -- a nsHashKey implementation that uses an nsIURI as the key
* B) SheetLoadData -- a small class that is used to store all the
* information needed for the loading of a sheet;
* this class handles listening for the stream
* loader completion and also handles charset
* determination.
*/
/************************************
* URLKey class used for hashtables *
************************************/
MOZ_DECL_CTOR_COUNTER(URLKey)
class URLKey: public nsHashKey {
public:
URLKey(nsIURI* aURL)
: mURL(aURL)
{
MOZ_COUNT_CTOR(URLKey);
mHashValue = 0;
nsCAutoString spec;
mURL->GetSpec(spec);
if (!spec.IsEmpty()) {
mHashValue = nsCRT::HashCode(spec.get());
}
}
URLKey(const URLKey& aKey)
: mURL(aKey.mURL),
mHashValue(aKey.mHashValue)
{
MOZ_COUNT_CTOR(URLKey);
}
virtual ~URLKey(void)
{
MOZ_COUNT_DTOR(URLKey);
}
virtual PRUint32 HashCode(void) const
{
return mHashValue;
}
virtual PRBool Equals(const nsHashKey* aKey) const
{
URLKey* key = (URLKey*)aKey;
PRBool equals = PR_FALSE;
nsresult result = mURL->Equals(key->mURL, &equals);
return (NS_SUCCEEDED(result) && equals);
}
virtual nsHashKey *Clone(void) const
{
return new URLKey(*this);
}
nsCOMPtr<nsIURI> mURL;
PRUint32 mHashValue;
};
/*********************************************
* Data needed to properly load a stylesheet *
*********************************************/
class SheetLoadData : public nsIUnicharStreamLoaderObserver
{
public:
virtual ~SheetLoadData(void);
// Data for loading a sheet linked from a document
SheetLoadData(CSSLoaderImpl* aLoader,
const nsAString& aTitle,
nsIParser* aParserToUnblock,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
nsIStyleSheetLinkingElement* aOwningElement,
nsICSSLoaderObserver* aObserver);
// Data for loading a sheet linked from an @import rule
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
SheetLoadData* aParentData,
nsICSSLoaderObserver* aObserver);
// Data for loading an agent sheet
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
PRBool aSyncLoad,
nsICSSLoaderObserver* aObserver);
NS_DECL_ISUPPORTS
NS_DECL_NSIUNICHARSTREAMLOADEROBSERVER
// Hold a ref to the CSSLoader so we can call back to it to let it
// know the load finished
CSSLoaderImpl* mLoader; // strong ref
// Title needed to pull datas out of the pending datas table when
// the preferred title is changed
nsString mTitle;
// Parser to be told to continue parsing once the load completes
nsCOMPtr<nsIParser> mParserToUnblock;
// URI we're loading. Null for inline sheets
nsCOMPtr<nsIURI> mURI;
// The sheet we're loading data for
nsCOMPtr<nsICSSStyleSheet> mSheet;
// Linked list of datas for the same URI as us
SheetLoadData* mNext; // strong ref
// Load data for the sheet that @import-ed us if we were @import-ed
// during the parse
SheetLoadData* mParentData; // strong ref
// Number of sheets we @import-ed that are still loading
PRUint32 mPendingChildren;
// mSyncLoad is true when the load needs to be synchronous -- right
// now only for LoadAgentSheet with no observer
PRPackedBool mSyncLoad;
// mIsAgent is true if the load was triggered by LoadAgentSheet or
// an @import from an agent sheet. Agent loads can proceed even if
// we have no document.
PRPackedBool mIsAgent;
// mIsLoading is true from the moment we are placed in the loader's
// "loading datas" table (right after the async channel is opened)
// to the moment we are removed from said table (due to the load
// completing or being cancelled).
PRPackedBool mIsLoading; // Set once the data is in the "loading" table
// mIsCancelled is set to true when a sheet load is stopped by
// Stop() or StopLoadingSheet(). SheetLoadData::OnStreamComplete()
// checks this to avoid parsing sheets that have been cancelled and
// such.
PRPackedBool mIsCancelled;
// This is the element that imported the sheet. Needed to get the
// charset set on it.
nsCOMPtr<nsIStyleSheetLinkingElement> mOwningElement;
// The observer that wishes to be notified of load completion
nsCOMPtr<nsICSSLoaderObserver> mObserver;
};
NS_IMPL_ISUPPORTS1(SheetLoadData, nsIUnicharStreamLoaderObserver);
/***********************************************************************
* Enum that describes the state of the sheet returned by CreateSheet. *
***********************************************************************/
enum StyleSheetState {
eSheetStateUnknown = 0,
eSheetNeedsParser,
eSheetPending,
eSheetLoading,
eSheetComplete
};
// And some convenience strings...
#ifdef PR_LOGGING
static const char* const gStateStrings[] = {
@ -306,144 +109,10 @@ static const char* const gStateStrings[] = {
};
#endif
/**********************
* Loader Declaration *
**********************/
class CSSLoaderImpl : public nsICSSLoader
{
public:
CSSLoaderImpl(void);
virtual ~CSSLoaderImpl(void);
NS_DECL_ISUPPORTS
// nsICSSLoader methods
NS_IMETHOD Init(nsIDocument* aDocument);
NS_IMETHOD DropDocumentReference(void);
NS_IMETHOD SetCaseSensitive(PRBool aCaseSensitive);
NS_IMETHOD SetCompatibilityMode(nsCompatibility aCompatMode);
NS_IMETHOD SetPreferredSheet(const nsAString& aTitle);
NS_IMETHOD GetParserFor(nsICSSStyleSheet* aSheet,
nsICSSParser** aParser);
NS_IMETHOD RecycleParser(nsICSSParser* aParser);
NS_IMETHOD LoadInlineStyle(nsIContent* aElement,
nsIUnicharInputStream* aIn,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadStyleLink(nsIContent* aElement,
nsIURI* aURL,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadChildSheet(nsICSSStyleSheet* aParentSheet,
nsIURI* aURL,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsICSSImportRule* aRule);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSStyleSheet** aSheet);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSLoaderObserver* aObserver);
// stop loading all sheets
NS_IMETHOD Stop(void);
// stop loading one sheet
NS_IMETHOD StopLoadingSheet(nsIURI* aURL);
/**
* Is the loader enabled or not.
* When disabled, processing of new styles is disabled and an attempt
* to do so will fail with a return code of
* NS_ERROR_NOT_AVAILABLE. Note that this DOES NOT disable
* currently loading styles or already processed styles.
*/
NS_IMETHOD GetEnabled(PRBool *aEnabled);
NS_IMETHOD SetEnabled(PRBool aEnabled);
// local helper methods (some are public for access from statics)
PRBool IsAlternate(const nsAString& aTitle);
private:
nsresult CreateSheet(nsIURI* aURI,
PRUint32 aDefaultNameSpaceID,
PRBool aSyncLoad,
StyleSheetState& aSheetState,
nsICSSStyleSheet** aSheet);
nsresult PrepareSheet(nsICSSStyleSheet* aSheet,
const nsAString& aTitle,
const nsAString& aMedia);
nsresult InsertSheetInDoc(nsICSSStyleSheet* aSheet,
nsIContent* aLinkingElement,
nsIDocument* aDocument);
nsresult InsertChildSheet(nsICSSStyleSheet* aSheet,
nsICSSStyleSheet* aParentSheet,
nsICSSImportRule* aParentRule);
nsresult InternalLoadAgentSheet(nsIURI* aURL,
nsICSSStyleSheet** aSheet,
nsICSSLoaderObserver* aObserver);
public:
nsresult LoadSheet(SheetLoadData* aLoadData, StyleSheetState aSheetState);
protected:
friend class SheetLoadData;
// Protected functions and members are ones that SheetLoadData needs
// access to
nsresult ParseSheet(nsIUnicharInputStream* aStream,
SheetLoadData* aLoadData,
PRBool& aCompleted);
public:
void SheetComplete(SheetLoadData* aLoadData, PRBool aSucceeded);
protected:
// the load data needs access to the document...
nsIDocument* mDocument; // the document we live for
#ifdef DEBUG
PRPackedBool mSyncCallback;
#endif
private:
PRPackedBool mCaseSensitive; // is document CSS case sensitive
PRPackedBool mEnabled; // is enabled to load new styles
nsCompatibility mCompatMode;
nsString mPreferredSheet; // title of preferred sheet
nsCOMArray<nsICSSParser> mParsers; // array of CSS parsers
nsSupportsHashtable mCompleteSheets;
nsHashtable mLoadingDatas; // weak refs
nsHashtable mPendingDatas; // weak refs
// We're not likely to have many levels of @import... But likely to have
// some. Allocate some storage, what the hell.
nsAutoVoidArray mParsingDatas;
};
/********************************
* SheetLoadData implementation *
********************************/
NS_IMPL_ISUPPORTS1(SheetLoadData, nsIUnicharStreamLoaderObserver);
SheetLoadData::SheetLoadData(CSSLoaderImpl* aLoader,
const nsAString& aTitle,
@ -537,6 +206,9 @@ SheetLoadData::~SheetLoadData()
* Loader Implementation *
*************************/
// static
nsCOMArray<nsICSSParser>* CSSLoaderImpl::gParsers = nsnull;
CSSLoaderImpl::CSSLoaderImpl(void)
: mDocument(nsnull),
mCaseSensitive(PR_FALSE),
@ -555,6 +227,12 @@ CSSLoaderImpl::~CSSLoaderImpl(void)
NS_IMPL_ISUPPORTS1(CSSLoaderImpl, nsICSSLoader)
void
CSSLoaderImpl::Shutdown()
{
delete gParsers;
}
NS_IMETHODIMP
CSSLoaderImpl::Init(nsIDocument* aDocument)
{
@ -632,21 +310,25 @@ NS_IMETHODIMP
CSSLoaderImpl::GetParserFor(nsICSSStyleSheet* aSheet,
nsICSSParser** aParser)
{
NS_ASSERTION(aParser, "null pointer");
if (! aParser) {
return NS_ERROR_NULL_POINTER;
NS_PRECONDITION(aParser, "Null out param");
*aParser = nsnull;
if (!gParsers) {
gParsers = new nsCOMArray<nsICSSParser>;
if (!gParsers) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
PRInt32 count = gParsers->Count();
if (0 < count--) {
*aParser = gParsers->ObjectAt(count);
NS_ADDREF(*aParser);
gParsers->RemoveObjectAt(count);
}
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);
}
@ -666,8 +348,9 @@ NS_IMETHODIMP
CSSLoaderImpl::RecycleParser(nsICSSParser* aParser)
{
NS_PRECONDITION(aParser, "Recycle only good parsers, please");
NS_ENSURE_TRUE(gParsers, NS_ERROR_UNEXPECTED);
if (!mParsers.AppendObject(aParser)) {
if (!gParsers->AppendObject(aParser)) {
return NS_ERROR_FAILURE;
}

369
layout/style/nsCSSLoader.h Normal file
View File

@ -0,0 +1,369 @@
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (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/NPL/
*
* 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 Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Boris Zbarsky <bzbarsky@mit.edu>
*
* This Original Code has been modified by IBM Corporation. Modifications made by IBM
* described herein are Copyright (c) International Business Machines Corporation, 2000.
* Modifications to Mozilla code or documentation identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
#ifndef nsCSSLoader_h__
#define nsCSSLoader_h__
class CSSLoaderImpl;
#include "nsIURI.h"
#include "nsIParser.h"
#include "nsICSSStyleSheet.h"
#include "nsIStyleSheetLinkingElement.h"
#include "nsICSSLoaderObserver.h"
#include "nsICSSLoader.h"
#include "nsICSSParser.h"
#include "nsIUnicharStreamLoader.h"
/**
* OVERALL ARCHITECTURE
*
* The CSS Loader gets requests to load various sorts of style sheets:
* inline style from <style> elements, linked style, @import-ed child
* sheets, agent sheets. The loader handles the following tasks:
*
* 1) Creation of the actual style sheet objects: CreateSheet()
* 2) setting of the right media, title, enabled state, etc on the
* sheet: PrepareSheet()
* 3) Insertion of the sheet in the proper cascade order:
* InsertSheetInDoc() and InsertChildSheet()
* 4) Load of the sheet: LoadSheet()
* 5) Parsing of the sheet: ParseSheet()
* 6) Cleanup: SheetComplete()
*
* The detailed documentation for these functions is found with the
* function implementations.
*
* The following helper objects are used:
* A) URLKey -- a nsHashKey implementation that uses an nsIURI as the key
* B) SheetLoadData -- a small class that is used to store all the
* information needed for the loading of a sheet;
* this class handles listening for the stream
* loader completion and also handles charset
* determination.
*/
/************************************
* URLKey class used for hashtables *
************************************/
MOZ_DECL_CTOR_COUNTER(URLKey)
class URLKey: public nsHashKey {
public:
URLKey(nsIURI* aURL)
: mURL(aURL)
{
MOZ_COUNT_CTOR(URLKey);
mHashValue = 0;
nsCAutoString spec;
mURL->GetSpec(spec);
if (!spec.IsEmpty()) {
mHashValue = nsCRT::HashCode(spec.get());
}
}
URLKey(const URLKey& aKey)
: mURL(aKey.mURL),
mHashValue(aKey.mHashValue)
{
MOZ_COUNT_CTOR(URLKey);
}
virtual ~URLKey(void)
{
MOZ_COUNT_DTOR(URLKey);
}
virtual PRUint32 HashCode(void) const
{
return mHashValue;
}
virtual PRBool Equals(const nsHashKey* aKey) const
{
URLKey* key = (URLKey*)aKey;
PRBool equals = PR_FALSE;
nsresult result = mURL->Equals(key->mURL, &equals);
return (NS_SUCCEEDED(result) && equals);
}
virtual nsHashKey *Clone(void) const
{
return new URLKey(*this);
}
nsCOMPtr<nsIURI> mURL;
PRUint32 mHashValue;
};
/*********************************************
* Data needed to properly load a stylesheet *
*********************************************/
class SheetLoadData : public nsIUnicharStreamLoaderObserver
{
public:
virtual ~SheetLoadData(void);
// Data for loading a sheet linked from a document
SheetLoadData(CSSLoaderImpl* aLoader,
const nsAString& aTitle,
nsIParser* aParserToUnblock,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
nsIStyleSheetLinkingElement* aOwningElement,
nsICSSLoaderObserver* aObserver);
// Data for loading a sheet linked from an @import rule
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
SheetLoadData* aParentData,
nsICSSLoaderObserver* aObserver);
// Data for loading an agent sheet
SheetLoadData(CSSLoaderImpl* aLoader,
nsIURI* aURI,
nsICSSStyleSheet* aSheet,
PRBool aSyncLoad,
nsICSSLoaderObserver* aObserver);
NS_DECL_ISUPPORTS
NS_DECL_NSIUNICHARSTREAMLOADEROBSERVER
// Hold a ref to the CSSLoader so we can call back to it to let it
// know the load finished
CSSLoaderImpl* mLoader; // strong ref
// Title needed to pull datas out of the pending datas table when
// the preferred title is changed
nsString mTitle;
// Parser to be told to continue parsing once the load completes
nsCOMPtr<nsIParser> mParserToUnblock;
// URI we're loading. Null for inline sheets
nsCOMPtr<nsIURI> mURI;
// The sheet we're loading data for
nsCOMPtr<nsICSSStyleSheet> mSheet;
// Linked list of datas for the same URI as us
SheetLoadData* mNext; // strong ref
// Load data for the sheet that @import-ed us if we were @import-ed
// during the parse
SheetLoadData* mParentData; // strong ref
// Number of sheets we @import-ed that are still loading
PRUint32 mPendingChildren;
// mSyncLoad is true when the load needs to be synchronous -- right
// now only for LoadAgentSheet with no observer
PRPackedBool mSyncLoad;
// mIsAgent is true if the load was triggered by LoadAgentSheet or
// an @import from an agent sheet. Agent loads can proceed even if
// we have no document.
PRPackedBool mIsAgent;
// mIsLoading is true from the moment we are placed in the loader's
// "loading datas" table (right after the async channel is opened)
// to the moment we are removed from said table (due to the load
// completing or being cancelled).
PRPackedBool mIsLoading; // Set once the data is in the "loading" table
// mIsCancelled is set to true when a sheet load is stopped by
// Stop() or StopLoadingSheet(). SheetLoadData::OnStreamComplete()
// checks this to avoid parsing sheets that have been cancelled and
// such.
PRPackedBool mIsCancelled;
// This is the element that imported the sheet. Needed to get the
// charset set on it.
nsCOMPtr<nsIStyleSheetLinkingElement> mOwningElement;
// The observer that wishes to be notified of load completion
nsCOMPtr<nsICSSLoaderObserver> mObserver;
};
/***********************************************************************
* Enum that describes the state of the sheet returned by CreateSheet. *
***********************************************************************/
enum StyleSheetState {
eSheetStateUnknown = 0,
eSheetNeedsParser,
eSheetPending,
eSheetLoading,
eSheetComplete
};
/**********************
* Loader Declaration *
**********************/
class CSSLoaderImpl : public nsICSSLoader
{
public:
CSSLoaderImpl(void);
virtual ~CSSLoaderImpl(void);
NS_DECL_ISUPPORTS
static void Shutdown(); // called at app shutdown
// nsICSSLoader methods
NS_IMETHOD Init(nsIDocument* aDocument);
NS_IMETHOD DropDocumentReference(void);
NS_IMETHOD SetCaseSensitive(PRBool aCaseSensitive);
NS_IMETHOD SetCompatibilityMode(nsCompatibility aCompatMode);
NS_IMETHOD SetPreferredSheet(const nsAString& aTitle);
NS_IMETHOD GetParserFor(nsICSSStyleSheet* aSheet,
nsICSSParser** aParser);
NS_IMETHOD RecycleParser(nsICSSParser* aParser);
NS_IMETHOD LoadInlineStyle(nsIContent* aElement,
nsIUnicharInputStream* aIn,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadStyleLink(nsIContent* aElement,
nsIURI* aURL,
const nsAString& aTitle,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsIParser* aParserToUnblock,
PRBool& aCompleted,
nsICSSLoaderObserver* aObserver);
NS_IMETHOD LoadChildSheet(nsICSSStyleSheet* aParentSheet,
nsIURI* aURL,
const nsAString& aMedia,
PRInt32 aDefaultNameSpaceID,
nsICSSImportRule* aRule);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSStyleSheet** aSheet);
NS_IMETHOD LoadAgentSheet(nsIURI* aURL, nsICSSLoaderObserver* aObserver);
// stop loading all sheets
NS_IMETHOD Stop(void);
// stop loading one sheet
NS_IMETHOD StopLoadingSheet(nsIURI* aURL);
/**
* Is the loader enabled or not.
* When disabled, processing of new styles is disabled and an attempt
* to do so will fail with a return code of
* NS_ERROR_NOT_AVAILABLE. Note that this DOES NOT disable
* currently loading styles or already processed styles.
*/
NS_IMETHOD GetEnabled(PRBool *aEnabled);
NS_IMETHOD SetEnabled(PRBool aEnabled);
// local helper methods (some are public for access from statics)
PRBool IsAlternate(const nsAString& aTitle);
private:
nsresult CreateSheet(nsIURI* aURI,
PRUint32 aDefaultNameSpaceID,
PRBool aSyncLoad,
StyleSheetState& aSheetState,
nsICSSStyleSheet** aSheet);
nsresult PrepareSheet(nsICSSStyleSheet* aSheet,
const nsAString& aTitle,
const nsAString& aMedia);
nsresult InsertSheetInDoc(nsICSSStyleSheet* aSheet,
nsIContent* aLinkingElement,
nsIDocument* aDocument);
nsresult InsertChildSheet(nsICSSStyleSheet* aSheet,
nsICSSStyleSheet* aParentSheet,
nsICSSImportRule* aParentRule);
nsresult InternalLoadAgentSheet(nsIURI* aURL,
nsICSSStyleSheet** aSheet,
nsICSSLoaderObserver* aObserver);
public:
nsresult LoadSheet(SheetLoadData* aLoadData, StyleSheetState aSheetState);
protected:
friend class SheetLoadData;
// Protected functions and members are ones that SheetLoadData needs
// access to
nsresult ParseSheet(nsIUnicharInputStream* aStream,
SheetLoadData* aLoadData,
PRBool& aCompleted);
public:
void SheetComplete(SheetLoadData* aLoadData, PRBool aSucceeded);
static nsCOMArray<nsICSSParser>* gParsers; // array of idle CSS parsers
protected:
// the load data needs access to the document...
nsIDocument* mDocument; // the document we live for
#ifdef DEBUG
PRPackedBool mSyncCallback;
#endif
private:
PRPackedBool mCaseSensitive; // is document CSS case sensitive
PRPackedBool mEnabled; // is enabled to load new styles
nsCompatibility mCompatMode;
nsString mPreferredSheet; // title of preferred sheet
nsSupportsHashtable mCompleteSheets;
nsHashtable mLoadingDatas; // weak refs
nsHashtable mPendingDatas; // weak refs
// We're not likely to have many levels of @import... But likely to have
// some. Allocate some storage, what the hell.
nsAutoVoidArray mParsingDatas;
};
#endif // nsCSSLoader_h__