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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
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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  *   Scott MacGregor <mscott@mozilla.org>
00025  *   Josh Aas <josh@mozilla.com>
00026  *
00027  * Alternatively, the contents of this file may be used under the terms of
00028  * either the GNU General Public License Version 2 or later (the "GPL"), or
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00040 
00041 #ifndef nsIconChannel_h___
00042 #define nsIconChannel_h___
00043 
00044 #include "nsCOMPtr.h"
00045 #include "nsXPIDLString.h"
00046 #include "nsIChannel.h"
00047 #include "nsILoadGroup.h"
00048 #include "nsIInterfaceRequestor.h"
00049 #include "nsIInterfaceRequestorUtils.h"
00050 #include "nsIInputStreamPump.h"
00051 #include "nsIStreamListener.h"
00052 #include "nsIURI.h"
00053 
00054 class nsIFile;
00055 
00056 class nsIconChannel : public nsIChannel, public nsIStreamListener
00057 {
00058 public:
00059   NS_DECL_ISUPPORTS
00060   NS_DECL_NSIREQUEST
00061   NS_DECL_NSICHANNEL
00062   NS_DECL_NSIREQUESTOBSERVER
00063   NS_DECL_NSISTREAMLISTENER
00064 
00065   nsIconChannel();
00066   virtual ~nsIconChannel();
00067 
00068   nsresult Init(nsIURI* uri);
00069 
00070 protected:
00071   nsCOMPtr<nsIURI> mUrl;
00072   nsCOMPtr<nsIURI> mOriginalURI;
00073   PRInt32          mContentLength;
00074   nsCOMPtr<nsILoadGroup> mLoadGroup;
00075   nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
00076   nsCOMPtr<nsISupports>  mOwner; 
00077   
00078   nsCOMPtr<nsIInputStreamPump> mPump;
00079   nsCOMPtr<nsIStreamListener>  mListener;
00080   
00081   nsresult MakeInputStream(nsIInputStream** _retval, PRBool nonBlocking);
00082   
00083   nsresult ExtractIconInfoFromUrl(nsIFile ** aLocalFile, PRUint32 * aDesiredImageSize,
00084                            nsACString &aContentType, nsACString &aFileExtension);
00085 };
00086 
00087 #endif /* nsIconChannel_h___ */