/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* ***** 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
 * Sun Microsystems, Inc.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Bolian Yin (bolian.yin@sun.com)
 *
 * 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
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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
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "InterfaceInitFuncs.h"

#include "Accessible-inl.h"
#include "nsMai.h"
#include "Role.h"

#include "nsString.h"

using namespace mozilla::a11y;

extern "C" {

static gboolean
doActionCB(AtkAction *aAction, gint aActionIndex)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aAction));
    if (!accWrap)
        return FALSE;
 
    nsresult rv = accWrap->DoAction(aActionIndex);
    return (NS_FAILED(rv)) ? FALSE : TRUE;
}

static gint
getActionCountCB(AtkAction *aAction)
{
  nsAccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aAction));
  return accWrap ? accWrap->ActionCount() : 0;
}

static const gchar*
getActionDescriptionCB(AtkAction *aAction, gint aActionIndex)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aAction));
    if (!accWrap)
        return nsnull;

    nsAutoString description;
    nsresult rv = accWrap->GetActionDescription(aActionIndex, description);
    NS_ENSURE_SUCCESS(rv, nsnull);
    return nsAccessibleWrap::ReturnString(description);
}

static const gchar*
getActionNameCB(AtkAction *aAction, gint aActionIndex)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aAction));
    if (!accWrap)
        return nsnull;

    nsAutoString autoStr;
    nsresult rv = accWrap->GetActionName(aActionIndex, autoStr);
    NS_ENSURE_SUCCESS(rv, nsnull);
    return nsAccessibleWrap::ReturnString(autoStr);
}

static const gchar*
getKeyBindingCB(AtkAction *aAction, gint aActionIndex)
{
  nsAccessibleWrap* acc = GetAccessibleWrap(ATK_OBJECT(aAction));
  if (!acc)
    return nsnull;

  // Return all key bindings including access key and keyboard shortcut.
  nsAutoString keyBindingsStr;

  // Get access key.
  KeyBinding keyBinding = acc->AccessKey();
  if (!keyBinding.IsEmpty()) {
    keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat);

    nsAccessible* parent = acc->Parent();
    roles::Role role = parent ? parent->Role() : roles::NOTHING;
    if (role == roles::PARENT_MENUITEM || role == roles::MENUITEM ||
        role == roles::RADIO_MENU_ITEM || role == roles::CHECK_MENU_ITEM) {
      // It is submenu, expose keyboard shortcuts from menu hierarchy like
      // "s;<Alt>f:s"
      nsAutoString keysInHierarchyStr = keyBindingsStr;
      do {
        KeyBinding parentKeyBinding = parent->AccessKey();
        if (!parentKeyBinding.IsEmpty()) {
          nsAutoString str;
          parentKeyBinding.ToString(str, KeyBinding::eAtkFormat);
          str.Append(':');

          keysInHierarchyStr.Insert(str, 0);
        }
      } while ((parent = parent->Parent()) && parent->Role() != roles::MENUBAR);

      keyBindingsStr.Append(';');
      keyBindingsStr.Append(keysInHierarchyStr);
    }
  } else {
    // No access key, add ';' to point this.
    keyBindingsStr.Append(';');
  }

  // Get keyboard shortcut.
  keyBindingsStr.Append(';');
  keyBinding = acc->KeyboardShortcut();
  if (!keyBinding.IsEmpty()) {
    keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat);
  }

  return nsAccessibleWrap::ReturnString(keyBindingsStr);
}
}

void
actionInterfaceInitCB(AtkActionIface* aIface)
{
  NS_ASSERTION(aIface, "Invalid aIface");
  if (NS_UNLIKELY(!aIface))
    return;

  aIface->do_action = doActionCB;
  aIface->get_n_actions = getActionCountCB;
  aIface->get_description = getActionDescriptionCB;
  aIface->get_keybinding = getKeyBindingCB;
  aIface->get_name = getActionNameCB;
}
