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lightning-sunbird  0.9+nobinonly
imgLoader.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
00002  *
00003  * ***** BEGIN LICENSE BLOCK *****
00004  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00005  *
00006  * The contents of this file are subject to the Mozilla Public License Version
00007  * 1.1 (the "License"); you may not use this file except in compliance with
00008  * the License. You may obtain a copy of the License at
00009  * http://www.mozilla.org/MPL/
00010  *
00011  * Software distributed under the License is distributed on an "AS IS" basis,
00012  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013  * for the specific language governing rights and limitations under the
00014  * License.
00015  *
00016  * The Original Code is mozilla.org code.
00017  *
00018  * The Initial Developer of the Original Code is
00019  * Netscape Communications Corporation.
00020  * Portions created by the Initial Developer are Copyright (C) 2001
00021  * the Initial Developer. All Rights Reserved.
00022  *
00023  * Contributor(s):
00024  *   Stuart Parmenter <pavlov@netscape.com>
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either the GNU General Public License Version 2 or later (the "GPL"), or
00028  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00029  * in which case the provisions of the GPL or the LGPL are applicable instead
00030  * of those above. If you wish to allow use of your version of this file only
00031  * under the terms of either the GPL or the LGPL, and not to allow others to
00032  * use your version of this file under the terms of the MPL, indicate your
00033  * decision by deleting the provisions above and replace them with the notice
00034  * and other provisions required by the GPL or the LGPL. If you do not delete
00035  * the provisions above, a recipient may use your version of this file under
00036  * the terms of any one of the MPL, the GPL or the LGPL.
00037  *
00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 #include "imgILoader.h"
00041 #include "nsIContentSniffer.h"
00042 
00043 #ifdef LOADER_THREADSAFE
00044 #include "prlock.h"
00045 #endif
00046 
00047 class imgRequest;
00048 class imgRequestProxy;
00049 class imgIRequest;
00050 class imgIDecoderObserver;
00051 class nsILoadGroup;
00052 
00053 #define NS_IMGLOADER_CID \
00054 { /* 9f6a0d2e-1dd1-11b2-a5b8-951f13c846f7 */         \
00055      0x9f6a0d2e,                                     \
00056      0x1dd1,                                         \
00057      0x11b2,                                         \
00058     {0xa5, 0xb8, 0x95, 0x1f, 0x13, 0xc8, 0x46, 0xf7} \
00059 }
00060 
00061 class imgLoader : public imgILoader, public nsIContentSniffer
00062 {
00063 public:
00064   NS_DECL_ISUPPORTS
00065   NS_DECL_IMGILOADER
00066   NS_DECL_NSICONTENTSNIFFER
00067 
00068   imgLoader();
00069   virtual ~imgLoader();
00070 
00071   static nsresult GetMimeTypeFromContent(const char* aContents, PRUint32 aLength, nsACString& aContentType);
00072 
00073 private:
00074   nsresult CreateNewProxyForRequest(imgRequest *aRequest, nsILoadGroup *aLoadGroup,
00075                                     imgIDecoderObserver *aObserver,
00076                                     nsLoadFlags aLoadFlags, imgIRequest *aRequestProxy,
00077                                     imgIRequest **_retval);
00078 };
00079 
00080 
00081 
00086 #include "nsCOMPtr.h"
00087 #include "nsIStreamListener.h"
00088 
00089 class ProxyListener : public nsIStreamListener
00090 {
00091 public:
00092   ProxyListener(nsIStreamListener *dest);
00093   virtual ~ProxyListener();
00094 
00095   /* additional members */
00096   NS_DECL_ISUPPORTS
00097   NS_DECL_NSISTREAMLISTENER
00098   NS_DECL_NSIREQUESTOBSERVER
00099 
00100 private:
00101   nsCOMPtr<nsIStreamListener> mDestListener;
00102 };
00103 
00104 
00109 #include "nsCOMArray.h"
00110 
00111 class imgCacheValidator : public nsIStreamListener
00112 {
00113 public:
00114   imgCacheValidator(imgRequest *request, void *aContext);
00115   virtual ~imgCacheValidator();
00116 
00117   void AddProxy(imgRequestProxy *aProxy);
00118 
00119   /* additional members */
00120   NS_DECL_ISUPPORTS
00121   NS_DECL_NSISTREAMLISTENER
00122   NS_DECL_NSIREQUESTOBSERVER
00123 
00124 private:
00125   nsCOMPtr<nsIStreamListener> mDestListener;
00126 
00127   imgRequest *mRequest;
00128   nsCOMArray<imgIRequest> mProxies;
00129 
00130   void *mContext;
00131 };