gecko-dev/content/xtf/public/nsIXTFAttributeHandler.idl

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/* -*- Mode: IDL; 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 the Mozilla XTF project.
*
* The Initial Developer of the Original Code is
* Alex Fritze.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Alex Fritze <alex@croczilla.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 nsIAtom;
[scriptable, uuid(72152f7f-7e8d-43fd-8477-3f29ae8d240d)]
interface nsIXTFAttributeHandler : nsISupports
{
// If 'false' the given attribute will be handled by the wrapper.
// Namespaced attributes will always be handled by the wrapper. The
// set of attributes handled by the attribute handler should remain
// constant for its complete lifetime.
boolean handlesAttribute(in nsIAtom name);
void setAttribute(in nsIAtom name, in AString newValue);
void removeAttribute(in nsIAtom name);
// If the attribute 'name' is unknown the implementation should mark
// the returned string as being 'null' (i.e. return 'null' in JS;
// call SetIsVoid(PR_TRUE) in C++) rather than throw an exception.
// A 'void' result will be translated into the attribute missing
// by the wrapper. An empty result will be translated into
// the attribute having no value.
AString getAttribute(in nsIAtom name);
boolean hasAttribute(in nsIAtom name);
unsigned long getAttributeCount();
// note that this method should return an *atom* not a string.
nsIAtom getAttributeNameAt(in unsigned long index);
};