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lightning-sunbird  0.9+nobinonly
nsBidiKeyboard.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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00011  * Software distributed under the License is distributed on an "AS IS" basis,
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00015  *
00016  * The Original Code is IBM code.
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00018  * The Initial Developer of the Original Code is
00019  * IBM. Portions created by IBM are Copyright (C) International Business Machines Corporation, 2000.  All Rights Reserved.
00020  * Portions created by the Initial Developer are Copyright (C) 2001
00021  * the Initial Developer. All Rights Reserved.
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00023  * Contributor(s):
00024  *   Simon Montagu
00025  *   Asaf Romano <mozilla.mano@sent.com>
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00027  * Alternatively, the contents of this file may be used under the terms of
00028  * either the GNU General Public License Version 2 or later (the "GPL"), or
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00040 
00041 #include "nsBidiKeyboard.h"
00042 
00043 NS_IMPL_ISUPPORTS1(nsBidiKeyboard, nsIBidiKeyboard)
00044 
00045 nsBidiKeyboard::nsBidiKeyboard() : nsIBidiKeyboard()
00046 {
00047 }
00048 
00049 nsBidiKeyboard::~nsBidiKeyboard()
00050 {
00051 }
00052 
00053 NS_IMETHODIMP nsBidiKeyboard::IsLangRTL(PRBool *aIsRTL)
00054 {
00055   *aIsRTL = PR_FALSE;
00056   nsresult rv = NS_ERROR_FAILURE;
00057 
00058   OSStatus err;
00059   KeyboardLayoutRef currentKeyboard;
00060 
00061   err = ::KLGetCurrentKeyboardLayout(&currentKeyboard);
00062   if (err == noErr)
00063   {
00064     const void* currentKeyboardResID;
00065     err = ::KLGetKeyboardLayoutProperty(currentKeyboard, kKLIdentifier,
00066                                         &currentKeyboardResID);
00067     if (err == noErr)
00068     {
00069       rv = NS_OK;
00070       *aIsRTL = IsRTLLanguage((SInt32)currentKeyboardResID);
00071     }
00072   }
00073 
00074   return rv;
00075 }
00076 
00077 NS_IMETHODIMP nsBidiKeyboard::SetLangFromBidiLevel(PRUint8 aLevel)
00078 {
00079   // XXX Insert platform specific code to set keyboard language
00080   return NS_OK;
00081 }
00082 
00083 PRBool nsBidiKeyboard::IsRTLLanguage(SInt32 aKeyboardResID)
00084 {
00085   // Check if the resource id is BiDi associated (Arabic, Persian, Hebrew)
00086   // (Persian is included in the Arabic range)
00087   // http://developer.apple.com/documentation/mac/Text/Text-534.html#HEADING534-0
00088   // Note: these ^^ values are negative on Mac OS X
00089   return (aKeyboardResID >= -18943 && aKeyboardResID <= -17920);
00090 }