author Michael Wu <>
Sat, 28 May 2011 00:15:25 -0700
changeset 70979 20a9cf3dc3a7033ef19c3cd5154ceab42c4713f1
parent 70968 eaa69ae330abb50bb8d68971a29d070228826dba
child 71883 59d282cf2d86ef320474ce3dd23600768fd9cd45
permissions -rw-r--r--
Backed out changeset eaa69ae330ab (bug 592943) for extensions bustage

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 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 Communicator client code.
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 *   Chris Waterson <>
 *   Brendan Eich <>
 *   Ben Goodger <>
 *   Benjamin Smedberg <>
 *   Mark Hammond <>
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

#ifndef nsXULPrototypeCache_h__
#define nsXULPrototypeCache_h__

#include "nsCOMPtr.h"
#include "nsIObserver.h"
#include "nsXBLDocumentInfo.h"
#include "nsIXULPrototypeCache.h"
#include "nsDataHashtable.h"
#include "nsInterfaceHashtable.h"
#include "nsRefPtrHashtable.h"
#include "nsURIHashKey.h"
#include "nsXULPrototypeDocument.h"

class nsIFastLoadService;
class nsCSSStyleSheet;

struct CacheScriptEntry
    PRUint32    mScriptTypeID; // the script language ID.
    void*       mScriptObject; // the script object.

 * The XUL prototype cache can be used to store and retrieve shared data for
 * XUL documents, style sheets, XBL, and scripts.
 * The cache has two levels:
 *  1. In-memory hashtables
 *  2. The on-disk fastload file.
class nsXULPrototypeCache : public nsIXULPrototypeCache,
    // nsISupports

    // nsIXULPrototypeCache
    virtual PRBool IsCached(nsIURI* aURI) {
        return GetPrototype(aURI) != nsnull;
    virtual void AbortFastLoads();

     * Whether the prototype cache is enabled.
    PRBool IsEnabled();

     * Flush the cache; remove all XUL prototype documents, style
     * sheets, and scripts.
    void Flush();

     * Remove a XUL document from the set of loading documents.
    void RemoveFromFastLoadSet(nsIURI* aDocumentURI);

     * Write the XUL prototype document to fastload file. The proto must be
     * fully loaded.
    nsresult WritePrototype(nsXULPrototypeDocument* aPrototypeDocument);

    // The following methods are used to put and retrive various items into and
    // from the cache.

    nsXULPrototypeDocument* GetPrototype(nsIURI* aURI);
    nsresult PutPrototype(nsXULPrototypeDocument* aDocument);

    void* GetScript(nsIURI* aURI, PRUint32* langID);
    nsresult PutScript(nsIURI* aURI, PRUint32 langID, void* aScriptObject);

    nsXBLDocumentInfo* GetXBLDocumentInfo(nsIURI* aURL) {
        return mXBLDocTable.GetWeak(aURL);
    nsresult PutXBLDocumentInfo(nsXBLDocumentInfo* aDocumentInfo);

     * Get a style sheet by URI. If the style sheet is not in the cache,
     * returns nsnull.
    nsCSSStyleSheet* GetStyleSheet(nsIURI* aURI) {
        return mStyleSheetTable.GetWeak(aURI);

     * Store a style sheet in the cache. The key, style sheet's URI is obtained
     * from the style sheet itself.
    nsresult PutStyleSheet(nsCSSStyleSheet* aStyleSheet);

    static nsXULPrototypeCache* GetInstance();
    static nsIFastLoadService* GetFastLoadService();

    static void ReleaseGlobals()

    friend nsresult
    NS_NewXULPrototypeCache(nsISupports* aOuter, REFNSIID aIID, void** aResult);

    virtual ~nsXULPrototypeCache();

    static nsXULPrototypeCache* sInstance;

    void FlushScripts();
    void FlushSkinFiles();

    nsRefPtrHashtable<nsURIHashKey,nsXULPrototypeDocument>  mPrototypeTable; // owns the prototypes
    nsRefPtrHashtable<nsURIHashKey,nsCSSStyleSheet>        mStyleSheetTable;
    nsDataHashtable<nsURIHashKey,CacheScriptEntry>         mScriptTable;
    nsRefPtrHashtable<nsURIHashKey,nsXBLDocumentInfo>  mXBLDocTable;

    // FastLoad
    // this is really a hash set, with a dummy data parameter
    nsDataHashtable<nsURIHashKey,PRUint32> mFastLoadURITable;

    static nsIFastLoadService*    gFastLoadService;
    static nsIFile*               gFastLoadFile;

    // Bootstrap FastLoad Service
    nsresult StartFastLoad(nsIURI* aDocumentURI);
    nsresult StartFastLoadingURI(nsIURI* aURI, PRInt32 aDirectionFlags);

#endif // nsXULPrototypeCache_h__