gecko-dev/netwerk/base/public/nsIUnicharStreamLoader.idl
bzbarsky%mit.edu d9ea7f8f8f Bug 119321 and bug 80106. Create a generic nsIUnicharStreamLoader that
makes two callbacks -- one to determine the charset and one to provide
an nsIUnicharInputStream.  Use this in the CSSLoader instead of
allocating a single big buffer for the sheet.  Clean up the way we look
for the @charset charset in the sheet data.

r=rpotts for netwerk/, r=peterv for content/, r=smontagu for intl/,
sr=darin for the whole thing.
2002-08-27 23:47:25 +00:00

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/* -*- Mode: C++; tab-width: 4; 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) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@netscape.com> (original author)
*
* 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 nsIUnicharInputStream;
interface nsIUnicharStreamLoader;
interface nsIChannel;
[scriptable, uuid(e06e8b08-8cdd-4503-a0a0-6f3b943602af)]
interface nsIUnicharStreamLoaderObserver : nsISupports
{
/**
* Called when the first full segment of data if available.
*
* @param aLoader the unichar stream loader
* @param aContext the aContext parameter passed to the loader's init method
* @param aFirstSegment the raw bytes of the first full data segment
* @param aLength the length of aFirstSegment
*
* @return charset corresponding to this stream
*/
ACString onDetermineCharset(in nsIUnicharStreamLoader aLoader,
in nsISupports aContext,
[size_is(aLength)] in string aFirstSegment,
in unsigned long aLength);
/**
* Called when the entire stream has been loaded.
*
* @param aLoader the unichar stream loader
* @param aContext the aContext parameter passed to the loader's init method
* @param aStatus the status of the underlying channel
* @param aUnicharData the unichar input stream containing the data. This
* can be null in some failure conditions.
*/
void onStreamComplete(in nsIUnicharStreamLoader aLoader,
in nsISupports aContext,
in nsresult aStatus,
in nsIUnicharInputStream aUnicharData);
};
[scriptable, uuid(8a3eca16-167e-443d-9485-7e84ed822e95)]
interface nsIUnicharStreamLoader : nsISupports
{
const unsigned long DEFAULT_SEGMENT_SIZE = 4096;
/**
* Initializes the unichar stream loader
*
* @param aChannel the channel to read data from. This should _not_ be
* opened; the loader will open the channel itself.
* @param aObserver the observer to notify when a charset is needed and when
* the load is complete
* @param aContext an opaque context pointer
* @param aSegmentSize the size of the segments to use for the data, in bytes
*/
void init(in nsIChannel aChannel,
in nsIUnicharStreamLoaderObserver aObserver,
in nsISupports aContext,
in unsigned long aSegmentSize);
/**
* The channel attribute is only valid inside the onDetermineCharset
* and onStreamComplete callbacks. Otherwise it will be null.
*/
readonly attribute nsIChannel channel;
/**
* The charset that onDetermineCharset returned, if that's been
* called.
*/
readonly attribute ACString charset;
};