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lightning-sunbird  0.9+nobinonly
nsAccessibleEventData.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 2003
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Original Author: Aaron Leventhal (aaronl@netscape.com)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
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00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
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00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "nsAccessibleEventData.h"
00040 #include "nsIAccessibilityService.h"
00041 #include "nsIAccessNode.h"
00042 #include "nsIServiceManager.h"
00043 
00044 NS_IMPL_ISUPPORTS1(nsAccessibleEventData, nsIAccessibleEvent)
00045 
00046 nsAccessibleEventData::nsAccessibleEventData(PRUint32 aEventType, nsIAccessible *aAccessible, 
00047                                              nsIAccessibleDocument *aDocAccessible, 
00048                                              void *aEventData):
00049   mEventType(aEventType), mAccessible(aAccessible), mDocAccessible(aDocAccessible), 
00050   mEventData(aEventData)
00051 {
00052 }
00053 
00054 nsAccessibleEventData::nsAccessibleEventData(PRUint32 aEventType, nsIDOMNode *aDOMNode,
00055                                              nsIAccessibleDocument *aDocAccessible, 
00056                                              void *aEventData):
00057   mEventType(aEventType), mDOMNode(aDOMNode), mDocAccessible(aDocAccessible),
00058   mEventData(aEventData)
00059 {
00060 }
00061 
00062 NS_IMETHODIMP nsAccessibleEventData::GetAccessible(nsIAccessible **aAccessible) 
00063 {
00064   *aAccessible = nsnull;
00065   if (!mAccessible) {
00066     NS_ENSURE_TRUE(mDOMNode, NS_ERROR_FAILURE);
00067     nsCOMPtr<nsIAccessibilityService> accService = 
00068       do_GetService("@mozilla.org/accessibilityService;1");
00069     NS_ENSURE_TRUE(accService, NS_ERROR_FAILURE);
00070     accService->GetAccessibleFor(mDOMNode, getter_AddRefs(mAccessible));
00071     if (!mAccessible) {
00072       return NS_OK;
00073     }
00074   }
00075   NS_ADDREF(*aAccessible = mAccessible);
00076   return NS_OK;
00077 }
00078 
00079 NS_IMETHODIMP nsAccessibleEventData::GetDOMNode(nsIDOMNode **aDOMNode)
00080 {
00081   if (!mDOMNode) {
00082     nsCOMPtr<nsIAccessNode> accessNode(do_QueryInterface(mAccessible));
00083     NS_ENSURE_TRUE(accessNode, NS_ERROR_FAILURE);
00084     accessNode->GetDOMNode(getter_AddRefs(mDOMNode));
00085   }
00086   NS_ADDREF(*aDOMNode = mDOMNode);
00087   return NS_OK;
00088 }