/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     
 * Port to the D Programming language:
 *     Jacob Carlborg <jacob.carlborg@gmail.com>
 *******************************************************************************/
module dwt.internal.BidiUtil;

import dwt.dwthelper.Runnable;
import dwt.dwthelper.utils;
import dwt.graphics.GC;
import dwt.widgets.Control;

/*
 * This class is supplied so that the StyledText code that supports bidi text (supported
 * for win platforms) is not platform dependent.  Bidi text is not implemented on 
 * emulated platforms.
 */
public class BidiUtil
{
    // Keyboard language types
    public static const int KEYBOARD_NON_BIDI = 0;
    public static const int KEYBOARD_BIDI = 1;

    // bidi rendering input flag constants, not used
    // on emulated platforms
    public static const int CLASSIN = 1;
    public static const int LINKBEFORE = 2;
    public static const int LINKAFTER = 4;

    // bidi rendering/ordering constants, not used on 
    // emulated platforms
    public static const int CLASS_HEBREW = 2;
    public static const int CLASS_ARABIC = 2;
    public static const int CLASS_LOCALNUMBER = 4;
    public static const int CLASS_LATINNUMBER = 5;
    public static const int REORDER = 0;
    public static const int LIGATE = 0;
    public static const int GLYPHSHAPE = 0;

    /*
     * Not implemented.
     */
    public static void addLanguageListener (int /*long*/hwnd,
            Runnable runnable)
    {
    }

    public static void addLanguageListener (Control control, Runnable runnable)
    {
    }

    /*
     * Not implemented.
     *
     */
    public static void drawGlyphs (GC gc, char[] renderBuffer, int[] renderDx,
            int x, int y)
    {
    }

    /*
     * Bidi not supported on emulated platforms.
     *
     */
    public static bool isBidiPlatform ()
    {
        return false;
    }

    /*
     * Not implemented.
     */
    public static bool isKeyboardBidi ()
    {
        return false;
    }

    /*
     * Not implemented.
     */
    public static int getFontBidiAttributes (GC gc)
    {
        return 0;
    }

    /*
     *  Not implemented.
     *
     */
    public static void getOrderInfo (GC gc, String text, int[] order,
            byte[] classBuffer, int flags, int[] offsets)
    {
    }

    /*
     *  Not implemented. Returns null.
     *
     */
    public static char[] getRenderInfo (GC gc, String text, int[] order,
            byte[] classBuffer, int[] dx, int flags, int[] offsets)
    {
        return null;
    }

    /*
     * Not implemented. Returns 0.
     */
    public static int getKeyboardLanguage ()
    {
        return 0;
    }

    /*
     * Not implemented.
     */
    public static void removeLanguageListener (int /*long*/hwnd)
    {
    }

    public static void removeLanguageListener (Control control)
    {
    }

    /*
     * Not implemented.
     */
    public static void setKeyboardLanguage (int language)
    {
    }

    /*
     * Not implemented.
     */
    public static bool setOrientation (int /*long*/hwnd, int orientation)
    {
        return false;
    }

    public static bool setOrientation (Control control, int orientation)
    {
        return false;
    }
}