/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 Netscape are
 * Copyright (C) 2001 Netscape Communications Corporation. All
 * Rights Reserved.
 * 
 * Author:
 *   Adam Lock <adamlock@netscape.com>
 *
 * Contributor(s): 
 */
 
#include "nsISupports.idl"

interface nsIDOMNode;

/**
 * An interface implemented by a tooltip text provider service. This
 * service is called to discover what tooltip text is associated
 * with the node that the pointer is positioned over.
 *
 * Embedders may implement and register their own tooltip text provider
 * service if they wish to provide different tooltip text. 
 *
 * The default service returns the text stored in the TITLE
 * attribute of the node or a containing parent.
 *
 * @note
 * The tooltip text provider service is registered with the contract
 * defined in NS_TOOLTIPTEXTPROVIDER_CONTRACTID.
 *
 * @see nsITooltipListener
 * @see nsIComponentManager
 * @see nsIDOMNode
 *
 * @status FROZEN
 */
[uuid(b128a1e6-44f3-4331-8fbe-5af360ff21ee)]
interface nsITooltipTextProvider : nsISupports
{
    /**
     * Called to obtain the tooltip text for a node.
     *
     * @arg aNode The node to obtain the text from.
     * @arg aText The tooltip text.
     *
     * @return <CODE>PR_TRUE</CODE> if tooltip text is associated
     *         with the node and was returned in the aText argument;
     *         <CODE>PR_FALSE</CODE> otherwise.
     */
    boolean getNodeText(in nsIDOMNode aNode, out wstring aText);
};

%{ C++
#define NS_TOOLTIPTEXTPROVIDER_CONTRACTID \
"@mozilla.org/embedcomp/tooltiptextprovider;1"
%}