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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsIURI;
interface nsIRequest;
/**
* nsIProgressEventSink
*
* This interface is used to asynchronously convey channel status and progress
* information that is generally not critical to the processing of the channel.
* The information is intended to be displayed to the user in some meaningful
* way.
*
* An implementation of this interface can be passed to a channel via the
* channel's notificationCallbacks attribute. See nsIChannel for more info.
*
* The channel will begin passing notifications to the progress event sink
* after its asyncOpen method has been called. Notifications will cease once
* the channel calls its listener's onStopRequest method or once the channel
* is canceled (via nsIRequest::cancel).
*
* NOTE: This interface is actually not specific to channels and may be used
* with other implementations of nsIRequest.
*/
[scriptable, uuid(87d55fba-cb7e-4f38-84c1-5c6c2b2a55e9)]
interface nsIProgressEventSink : nsISupports
{
/**
* Called to notify the event sink that progress has occurred for the
* given request.
*
* @param aRequest
* the request being observed (may QI to nsIChannel).
* @param aProgress
* numeric value in the range 0 to aProgressMax indicating the
* number of bytes transfered thus far.
* @param aProgressMax
* numeric value indicating maximum number of bytes that will be
* transfered (or -1 if total is unknown).
*/
void onProgress(in nsIRequest aRequest,
in long long aProgress,
in long long aProgressMax);
/**
* Called to notify the event sink with a status message for the given
* request.
*
* @param aRequest
* the request being observed (may QI to nsIChannel).
* @param aStatus
* status code (not necessarily an error code) indicating the
* state of the channel (usually the state of the underlying
* transport). see nsISocketTransport for socket specific status
* codes.
* @param aStatusArg
* status code argument to be used with the string bundle service
* to convert the status message into localized, human readable
* text. the meaning of this parameter is specific to the value
* of the status code. for socket status codes, this parameter
* indicates the host:port associated with the status code.
*/
void onStatus(in nsIRequest aRequest,
in nsresult aStatus,
in wstring aStatusArg);
};