/* -*- 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 IBM code.
 *
 * The Initial Developer of the Original Code is
 * IBM.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Simon Montagu
 *   Asaf Romano <mozilla.mano@sent.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
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 * decision by deleting the provisions above and replace them with the notice
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 * ***** END LICENSE BLOCK ***** */

#include "nsBidiKeyboard.h"
#include "nsObjCExceptions.h"

#import <Carbon/Carbon.h>

NS_IMPL_ISUPPORTS1(nsBidiKeyboard, nsIBidiKeyboard)

nsBidiKeyboard::nsBidiKeyboard() : nsIBidiKeyboard()
{
}

nsBidiKeyboard::~nsBidiKeyboard()
{
}

NS_IMETHODIMP nsBidiKeyboard::IsLangRTL(PRBool *aIsRTL)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  *aIsRTL = PR_FALSE;
  nsresult rv = NS_ERROR_FAILURE;

  OSStatus err;
  KeyboardLayoutRef currentKeyboard;

  err = ::KLGetCurrentKeyboardLayout(&currentKeyboard);
  if (err == noErr) {
    const void* currentKeyboardResID;
    err = ::KLGetKeyboardLayoutProperty(currentKeyboard, kKLIdentifier,
                                        &currentKeyboardResID);
    if (err == noErr) {
      // Check if the resource id is BiDi associated (Arabic, Persian, Hebrew)
      // (Persian is included in the Arabic range)
      // http://developer.apple.com/documentation/mac/Text/Text-534.html#HEADING534-0
      // Note: these ^^ values are negative on Mac OS X
      *aIsRTL = ((SInt32)currentKeyboardResID >= -18943 &&
                 (SInt32)currentKeyboardResID <= -17920);
      rv = NS_OK;
    }
  }

  return rv;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

NS_IMETHODIMP nsBidiKeyboard::SetLangFromBidiLevel(PRUint8 aLevel)
{
  // XXX Insert platform specific code to set keyboard language
  return NS_OK;
}
