gecko/accessible/src/base/nsAccessibleEventData.cpp

/* -*- Mode: C++; 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Original Author: Aaron Leventhal (aaronl@netscape.com)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 "nsAccessibleEventData.h"
#include "nsIAccessibilityService.h"
#include "nsIAccessNode.h"
#include "nsIServiceManager.h"

NS_IMPL_ISUPPORTS1(nsAccEvent, nsIAccessibleEvent)

nsAccEvent::nsAccEvent(PRUint32 aEventType, nsIAccessible *aAccessible,
                       void *aEventData):
  mEventType(aEventType), mAccessible(aAccessible), mEventData(aEventData)
{
}

nsAccEvent::nsAccEvent(PRUint32 aEventType, nsIDOMNode *aDOMNode,
                       void *aEventData):
  mEventType(aEventType), mDOMNode(aDOMNode), mEventData(aEventData)
{
}

NS_IMETHODIMP
nsAccEvent::GetEventType(PRUint32 *aEventType)
{
  *aEventType = mEventType;
  return NS_OK;
}

NS_IMETHODIMP
nsAccEvent::GetAccessible(nsIAccessible **aAccessible)
{
  NS_ENSURE_ARG_POINTER(aAccessible);
  *aAccessible = nsnull;

  if (!mAccessible) {
    NS_ENSURE_TRUE(mDOMNode, NS_ERROR_FAILURE);
    nsCOMPtr<nsIAccessibilityService> accService = 
      do_GetService("@mozilla.org/accessibilityService;1");
    NS_ENSURE_TRUE(accService, NS_ERROR_FAILURE);
    accService->GetAccessibleFor(mDOMNode, getter_AddRefs(mAccessible));
    if (!mAccessible) {
      return NS_OK;
    }
  }
  NS_IF_ADDREF(*aAccessible = mAccessible);
  return NS_OK;
}

NS_IMETHODIMP
nsAccEvent::GetDOMNode(nsIDOMNode **aDOMNode)
{
  NS_ENSURE_ARG_POINTER(aDOMNode);
  *aDOMNode = nsnull;

  if (!mDOMNode) {
    nsCOMPtr<nsIAccessNode> accessNode(do_QueryInterface(mAccessible));
    NS_ENSURE_TRUE(accessNode, NS_ERROR_FAILURE);
    accessNode->GetDOMNode(getter_AddRefs(mDOMNode));
  }

  NS_IF_ADDREF(*aDOMNode = mDOMNode);
  return NS_OK;
}

NS_IMETHODIMP
nsAccEvent::GetAccessibleDocument(nsIAccessibleDocument **aDocAccessible)
{
  NS_ENSURE_ARG_POINTER(aDocAccessible);
  *aDocAccessible = nsnull;

  if (!mDocAccessible) {
    if (!mAccessible) {
      nsCOMPtr<nsIAccessible> accessible;
      GetAccessible(getter_AddRefs(accessible));
    }

    nsCOMPtr<nsIAccessNode> accessNode(do_QueryInterface(mAccessible));
    NS_ENSURE_TRUE(accessNode, NS_ERROR_FAILURE);
    accessNode->GetAccessibleDocument(getter_AddRefs(mDocAccessible));
  }

  NS_IF_ADDREF(*aDocAccessible = mDocAccessible);
  return NS_OK;
}


// nsAccStateChangeEvent
NS_IMPL_ISUPPORTS_INHERITED1(nsAccStateChangeEvent, nsAccEvent,
                             nsIAccessibleStateChangeEvent)

nsAccStateChangeEvent::
  nsAccStateChangeEvent(nsIAccessible *aAccessible,
                        PRUint32 aState, PRBool aIsExtraState,
                        PRBool aIsEnabled):
  nsAccEvent(::nsIAccessibleEvent::EVENT_STATE_CHANGE, aAccessible, nsnull),
  mState(aState), mIsExtraState(aIsExtraState), mIsEnabled(aIsEnabled)
{
}

nsAccStateChangeEvent::
  nsAccStateChangeEvent(nsIDOMNode *aNode,
                        PRUint32 aState, PRBool aIsExtraState,
                        PRBool aIsEnabled):
  nsAccEvent(::nsIAccessibleEvent::EVENT_STATE_CHANGE, aNode, nsnull),
  mState(aState), mIsExtraState(aIsExtraState), mIsEnabled(aIsEnabled)
{
}

nsAccStateChangeEvent::
  nsAccStateChangeEvent(nsIDOMNode *aNode,
                        PRUint32 aState, PRBool aIsExtraState):
  nsAccEvent(::nsIAccessibleEvent::EVENT_STATE_CHANGE, aNode, nsnull),
  mState(aState), mIsExtraState(aIsExtraState)
{
  nsCOMPtr<nsIAccessible> accessible;
  GetAccessible(getter_AddRefs(accessible));
  if (accessible) {
    PRUint32 state = 0, extraState = 0;
    accessible->GetFinalState(&state, &extraState);
    mIsEnabled = ((mIsExtraState ? extraState : state) & mState) != 0;
  } else {
    mIsEnabled = PR_FALSE;
  }
}

NS_IMETHODIMP
nsAccStateChangeEvent::GetState(PRUint32 *aState)
{
  *aState = mState;
  return NS_OK;
}

NS_IMETHODIMP
nsAccStateChangeEvent::IsExtraState(PRBool *aIsExtraState)
{
  *aIsExtraState = mIsExtraState;
  return NS_OK;
}

NS_IMETHODIMP
nsAccStateChangeEvent::IsEnabled(PRBool *aIsEnabled)
{
  *aIsEnabled = mIsEnabled;
  return NS_OK;
}


// nsAccStateChangeEvent
NS_IMPL_ISUPPORTS_INHERITED1(nsAccTextChangeEvent, nsAccEvent,
                             nsIAccessibleTextChangeEvent)

nsAccTextChangeEvent::
  nsAccTextChangeEvent(nsIAccessible *aAccessible,
                       PRInt32 aStart, PRUint32 aLength, PRBool aIsInserted):
  nsAccEvent(::nsIAccessibleEvent::EVENT_TEXT_CHANGED, aAccessible, nsnull),
  mStart(aStart), mLength(aLength), mIsInserted(mIsInserted)
{
}

NS_IMETHODIMP
nsAccTextChangeEvent::GetStart(PRInt32 *aStart)
{
  *aStart = mStart;
  return NS_OK;
}

NS_IMETHODIMP
nsAccTextChangeEvent::GetLength(PRUint32 *aLength)
{
  *aLength = mLength;
  return NS_OK;
}

NS_IMETHODIMP
nsAccTextChangeEvent::IsInserted(PRBool *aIsInserted)
{
  *aIsInserted = mIsInserted;
  return NS_OK;
}