modules/libpr0n/src/imgLoader.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  *
   3  * ***** BEGIN LICENSE BLOCK *****
   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
   8  * the License. You may obtain a copy of the License at
   9  * http://www.mozilla.org/MPL/
  10  *
  11  * Software distributed under the License is distributed on an "AS IS" basis,
  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13  * for the specific language governing rights and limitations under the
  14  * License.
  15  *
  16  * The Original Code is mozilla.org code.
  17  *
  18  * The Initial Developer of the Original Code is
  19  * Netscape Communications Corporation.
  20  * Portions created by the Initial Developer are Copyright (C) 2001
  21  * the Initial Developer. All Rights Reserved.
  22  *
  23  * Contributor(s):
  24  *   Stuart Parmenter <pavlov@netscape.com>
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either the GNU General Public License Version 2 or later (the "GPL"), or
  28  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
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  34  * and other provisions required by the GPL or the LGPL. If you do not delete
  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39
  40 #include "imgILoader.h"
  41 #include "nsIContentSniffer.h"
  42
  43 #ifdef LOADER_THREADSAFE
  44 #include "prlock.h"
  45 #endif
  46
  47 class imgRequest;
  48 class imgRequestProxy;
  49 class imgIRequest;
  50 class imgIDecoderObserver;
  51 class nsILoadGroup;
  52
  53 #define NS_IMGLOADER_CID \
  54 { /* 9f6a0d2e-1dd1-11b2-a5b8-951f13c846f7 */         \
  55      0x9f6a0d2e,                                     \
  56      0x1dd1,                                         \
  57      0x11b2,                                         \
  58     {0xa5, 0xb8, 0x95, 0x1f, 0x13, 0xc8, 0x46, 0xf7} \
  59 }
  60
  61 class imgLoader : public imgILoader, public nsIContentSniffer
  62 {
  63 public:
  64   NS_DECL_ISUPPORTS
  65   NS_DECL_IMGILOADER
  66   NS_DECL_NSICONTENTSNIFFER
  67
  68   imgLoader();
  69   virtual ~imgLoader();
  70
  71   static nsresult GetMimeTypeFromContent(const char* aContents, PRUint32 aLength, nsACString& aContentType);
  72
  73 private:
  74   nsresult CreateNewProxyForRequest(imgRequest *aRequest, nsILoadGroup *aLoadGroup,
  75                                     imgIDecoderObserver *aObserver,
  76                                     nsLoadFlags aLoadFlags, imgIRequest *aRequestProxy,
  77                                     imgIRequest **_retval);
  78 };
  79
  80
  81
  82 /**
  83  * proxy stream listener class used to handle multipart/x-mixed-replace
  84  */
  85
  86 #include "nsCOMPtr.h"
  87 #include "nsIStreamListener.h"
  88
  89 class ProxyListener : public nsIStreamListener
  90 {
  91 public:
  92   ProxyListener(nsIStreamListener *dest);
  93   virtual ~ProxyListener();
  94
  95   /* additional members */
  96   NS_DECL_ISUPPORTS
  97   NS_DECL_NSISTREAMLISTENER
  98   NS_DECL_NSIREQUESTOBSERVER
  99
 100 private:
 101   nsCOMPtr<nsIStreamListener> mDestListener;
 102 };
 103
 104
 105 /**
 106  * validate checker
 107  */
 108
 109 #include "nsCOMArray.h"
 110
 111 class imgCacheValidator : public nsIStreamListener
 112 {
 113 public:
 114   imgCacheValidator(imgRequest *request, void *aContext);
 115   virtual ~imgCacheValidator();
 116
 117   void AddProxy(imgRequestProxy *aProxy);
 118
 119   /* additional members */
 120   NS_DECL_ISUPPORTS
 121   NS_DECL_NSISTREAMLISTENER
 122   NS_DECL_NSIREQUESTOBSERVER
 123
 124 private:
 125   nsCOMPtr<nsIStreamListener> mDestListener;
 126
 127   imgRequest *mRequest;
 128   nsCOMArray<imgIRequest> mProxies;
 129
 130   void *mContext;
 131 };