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/* ***** 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
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.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
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 * 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
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 *
 * ***** END LICENSE BLOCK ***** */

#include "nsHyperTextAccessibleWrap.h"

NS_IMPL_ISUPPORTS_INHERITED0(nsHyperTextAccessibleWrap,
                             nsHyperTextAccessible)

IMPL_IUNKNOWN_INHERITED2(nsHyperTextAccessibleWrap,
                         nsAccessibleWrap,
                         CAccessibleHypertext,
                         CAccessibleEditableText);

NS_IMETHODIMP
nsHyperTextAccessibleWrap::FireAccessibleEvent(nsIAccessibleEvent *aEvent)
{
  PRUint32 eventType;
  aEvent->GetEventType(&eventType);

  if (eventType == nsIAccessibleEvent::EVENT_TEXT_REMOVED ||
      eventType == nsIAccessibleEvent::EVENT_TEXT_INSERTED) {
    nsCOMPtr<nsIAccessible> accessible;
    aEvent->GetAccessible(getter_AddRefs(accessible));
    if (accessible) {
      nsCOMPtr<nsIWinAccessNode> winAccessNode(do_QueryInterface(accessible));
      if (winAccessNode) {
        void *instancePtr = NULL;
        nsresult rv = winAccessNode->QueryNativeInterface(IID_IAccessibleText,
                                                          &instancePtr);
        if (NS_SUCCEEDED(rv)) {
          NS_IF_RELEASE(gTextEvent);

          CallQueryInterface(aEvent, &gTextEvent);
          (static_cast<IUnknown*>(instancePtr))->Release();
        }
      }
    }
  }

  return nsHyperTextAccessible::FireAccessibleEvent(aEvent);
}

nsresult
nsHyperTextAccessibleWrap::GetModifiedText(PRBool aGetInsertedText,
                                           nsAString& aText,
                                           PRUint32 *aStartOffset,
                                           PRUint32 *aEndOffset)
{
  aText.Truncate();
  *aStartOffset = 0;
  *aEndOffset = 0;

  if (!gTextEvent)
    return NS_OK;
    
  PRBool isInserted;
  gTextEvent->IsInserted(&isInserted);
  if (aGetInsertedText != isInserted)
    return NS_OK;

  nsCOMPtr<nsIAccessible> targetAcc;
  gTextEvent->GetAccessible(getter_AddRefs(targetAcc));
  if (targetAcc != this)
    return NS_OK;

  PRInt32 offset;
  PRUint32 length;

  gTextEvent->GetStart(&offset);
  gTextEvent->GetLength(&length);
  *aStartOffset = offset;
  *aEndOffset = offset + length;
  return gTextEvent->GetModifiedText(aText);
}