gecko/modules/libpr0n/public/imgILoader.idl

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** 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
* http://www.mozilla.org/MPL/
*
* 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Stuart Parmenter <pavlov@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 ***** */
#include "nsISupports.idl"
interface imgIDecoderObserver;
interface imgIRequest;
interface nsIChannel;
interface nsILoadGroup;
interface nsIStreamListener;
interface nsIURI;
interface nsISimpleEnumerator;
#include "nsIRequest.idl" // for nsLoadFlags
/**
* imgILoader interface
*
* @author Stuart Parmenter <pavlov@netscape.com>
* @version 0.3
* @see imagelib2
*/
[scriptable, uuid(a32826ff-9e56-4425-a811-97a8dba64ff5)]
interface imgILoader : nsISupports
{
/**
* Start the load and decode of an image.
* @param aURI the URI to load
* @param aInitialDocumentURI the URI that 'initiated' the load -- used for 3rd party cookie blocking
* @param aReferrerURI the 'referring' URI
* @param aLoadGroup Loadgroup to put the image load into
* @param aObserver the observer
* @param aCX some random data
* @param aLoadFlags Load flags for the request
* @param aCacheKey cache key to use for a load if the original
* image came from a request that had post data
* @param aRequest A newly created, unused imgIRequest object or NULL for one to
be created for you.
* libpr0n does NOT keep a strong ref to the observer; this prevents
* reference cycles. This means that callers of loadImage should
* make sure to Cancel() the resulting request before the observer
* goes away.
*/
imgIRequest loadImage(in nsIURI aURI,
in nsIURI aInitialDocumentURL,
in nsIURI aReferrerURI,
in nsILoadGroup aLoadGroup,
in imgIDecoderObserver aObserver,
in nsISupports aCX,
in nsLoadFlags aLoadFlags,
in nsISupports cacheKey,
in imgIRequest aRequest);
/**
* Start the load and decode of an image.
* @param aChannel the channel to load the image from. This must
* already be opened before ths method is called, and there
* must have been no OnDataAvailable calls for it yet.
* @param aObserver the observer
* @param cx some random data
* @param aListener [out]
* A listener that should receive the data. Can be null, in which
* case imagelib has found a cached image and is not interested in
* the data. The caller needs not cancel the channel in this case.
*
* libpr0n does NOT keep a strong ref to the observer; this prevents
* reference cycles. This means that callers of loadImageWithChannel should
* make sure to Cancel() the resulting request before the observer goes away.
*/
imgIRequest loadImageWithChannel(in nsIChannel aChannel, in imgIDecoderObserver aObserver, in nsISupports cx, out nsIStreamListener aListener);
/**
* Checks if a decoder for the an image with the given mime type is available
* @param mimeType The type to find a decoder for
* @return true if a decoder is available, false otherwise
*/
boolean supportImageWithMimeType(in string mimeType);
};