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nsIconChannel.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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  * Brian Ryner.
00020  * Portions created by the Initial Developer are Copyright (C) 2000
00021  * the Initial Developer. All Rights Reserved.
00022  *
00023  * Contributor(s):
00024  *   Scott MacGregor <mscott@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
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00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 #ifndef nsIconChannel_h___
00041 #define nsIconChannel_h___
00042 
00043 #include "nsCOMPtr.h"
00044 #include "nsXPIDLString.h"
00045 #include "nsIChannel.h"
00046 #include "nsILoadGroup.h"
00047 #include "nsIInterfaceRequestor.h"
00048 #include "nsIInterfaceRequestorUtils.h"
00049 #include "nsIURI.h"
00050 #include "nsIInputStreamPump.h"
00051 #include "nsIStreamListener.h"
00052 
00053 class nsIFile;
00054 
00055 class nsIconChannel : public nsIChannel, public nsIStreamListener
00056 {
00057 public:
00058   NS_DECL_ISUPPORTS
00059   NS_DECL_NSIREQUEST
00060   NS_DECL_NSICHANNEL
00061   NS_DECL_NSIREQUESTOBSERVER
00062   NS_DECL_NSISTREAMLISTENER
00063 
00064   nsIconChannel();
00065   ~nsIconChannel();
00066 
00067   nsresult Init(nsIURI* uri);
00068 
00069 protected:
00070   nsCOMPtr<nsIURI> mUrl;
00071   nsCOMPtr<nsIURI> mOriginalURI;
00072   PRInt32          mContentLength;
00073   nsCOMPtr<nsILoadGroup> mLoadGroup;
00074   nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
00075   nsCOMPtr<nsISupports>  mOwner; 
00076 
00077   nsCOMPtr<nsIInputStreamPump> mPump;
00078   nsCOMPtr<nsIStreamListener>  mListener;
00079 
00080   nsresult ExtractIconInfoFromUrl(nsIFile ** aLocalFile, PRUint32 * aDesiredImageSize, nsACString &aContentType, nsACString &aFileExtension);
00081   nsresult MakeInputStream(nsIInputStream** _retval, PRBool nonBlocking);
00082 };
00083 
00084 #endif /* nsIconChannel_h___ */