/*******************************************************************************
 * Copyright (c) 2000, 2007 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
 *******************************************************************************/
module dwt.widgets.FontDialog;

import dwt.dwthelper.utils;

 
import dwt.DWT;
import dwt.DWTException;
import dwt.graphics.Font;
import dwt.graphics.FontData;
import dwt.graphics.PaletteData;
import dwt.graphics.RGB;
import dwt.internal.cocoa.NSApplication;
import dwt.internal.cocoa.NSFont;
import dwt.internal.cocoa.NSFontManager;
import dwt.internal.cocoa.NSFontPanel;
import dwt.internal.cocoa.NSString;
import dwt.internal.cocoa.OS;
import dwt.internal.cocoa.SWTPanelDelegate;

/**
 * Instances of this class allow the user to select a font
 * from all available fonts in the system.
 * <dl>
 * <dt><b>Styles:</b></dt>
 * <dd>(none)</dd>
 * <dt><b>Events:</b></dt>
 * <dd>(none)</dd>
 * </dl>
 * <p>
 * IMPORTANT: This class is intended to be subclassed <em>only</em>
 * within the DWT implementation.
 * </p>
 */
public class FontDialog extends Dialog {
    FontData fontData;
    RGB rgb;
    bool open;
    int fontID, fontSize;

/**
 * Constructs a new instance of this class given only its parent.
 *
 * @param parent a shell which will be the parent of the new instance
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
 * </ul>
 * @exception DWTException <ul>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
 *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
 * </ul>
 */
public FontDialog (Shell parent) {
    this (parent, DWT.APPLICATION_MODAL);
}

/**
 * Constructs a new instance of this class given its parent
 * and a style value describing its behavior and appearance.
 * <p>
 * The style value is either one of the style constants defined in
 * class <code>DWT</code> which is applicable to instances of this
 * class, or must be built by <em>bitwise OR</em>'ing together 
 * (that is, using the <code>int</code> "|" operator) two or more
 * of those <code>DWT</code> style constants. The class description
 * lists the style constants that are applicable to the class.
 * Style bits are also inherited from superclasses.
 * </p>
 *
 * @param parent a shell which will be the parent of the new instance
 * @param style the style of dialog to construct
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
 * </ul>
 * @exception DWTException <ul>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
 *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
 * </ul>
 */
public FontDialog (Shell parent, int style) {
    super (parent, style);
    checkSubclass ();
}

void changeFont(int arg0) {
}

/**
 * Returns a FontData object describing the font that was
 * selected in the dialog, or null if none is available.
 * 
 * @return the FontData for the selected font, or null
 * @deprecated use #getFontList ()
 */
public FontData getFontData () {
    return fontData;
}

/**
 * Returns a FontData set describing the font that was
 * selected in the dialog, or null if none is available.
 * 
 * @return the FontData for the selected font, or null
 * @since 2.1.1
 */
public FontData [] getFontList () {
    if (fontData is null) return null;
    FontData [] result = new FontData [1];
    result [0] = fontData;
    return result;
}

/**
 * Returns an RGB describing the color that was selected
 * in the dialog, or null if none is available.
 *
 * @return the RGB value for the selected color, or null
 *
 * @see PaletteData#getRGBs
 * 
 * @since 2.1
 */
public RGB getRGB () {
    return rgb;
}

//int fontProc (int nextHandler, int theEvent, int userData) {
//  int kind = OS.GetEventKind (theEvent);
//  switch (kind) {
//      case OS.kEventFontPanelClosed:
//          open = false;
//          break;
//      case OS.kEventFontSelection:
//          int [] fontID = new int [1];
//          if (OS.GetEventParameter (theEvent, OS.kEventParamATSUFontID, OS.typeUInt32, null, 4, null, fontID) is OS.noErr) {
//              this.fontID = fontID [0];
//          }
//          int [] fontSize = new int [1];
//          if (OS.GetEventParameter (theEvent, OS.kEventParamATSUFontSize, OS.typeFixed, null, 4, null, fontSize) is OS.noErr) {
//              this.fontSize = fontSize [0];
//          }
//          RGBColor color = new RGBColor ();
//          int [] actualSize = new int [1];
//          if (OS.GetEventParameter (theEvent, OS.kEventParamFontColor, OS.typeRGBColor, null, RGBColor.sizeof, actualSize, color) is OS.noErr) {
//              int red = (color.red >> 8) & 0xFF;
//              int green = (color.green >> 8) & 0xFF;
//              int blue =  (color.blue >> 8) & 0xFF;
//              rgb = new RGB (red, green, blue);
//          } else {
//              int [] dict = new int [1];
//              if (OS.GetEventParameter (theEvent, OS.kEventParamDictionary, OS.typeCFDictionaryRef, null, 4, actualSize, dict) is OS.noErr) {
//                  int [] attrib = new int [1];
//                  if (OS.CFDictionaryGetValueIfPresent (dict [0], OS.kFontPanelAttributesKey (), attrib)) {
//                      int [] tags = new int [1];
//                      int [] sizes = new int [1];
//                      int [] values = new int [1];
//                      if (OS.CFDictionaryGetValueIfPresent (attrib [0], OS.kFontPanelAttributeTagsKey (), tags) &&
//                          OS.CFDictionaryGetValueIfPresent (attrib [0], OS.kFontPanelAttributeSizesKey (), sizes) &&
//                          OS.CFDictionaryGetValueIfPresent (attrib [0], OS.kFontPanelAttributeValuesKey (), values)
//                      ) {
//                          int count = OS.CFDataGetLength (tags [0]) / 4;
//                          int tagPtr = OS.CFDataGetBytePtr (tags[0]);
//                            int sizePtr = OS.CFDataGetBytePtr (sizes [0]);
//                            int [] tag = new int [1];
//                            int [] size = new int [1];
//                            int valueOffset = 0;
//                            for (int i = 0 ; i < count ; i++) {
//                              OS.memmove (tag, tagPtr + (i * 4), 4);
//                              OS.memmove (size, sizePtr + (i * 4), 4);
//                                if (tag [0] is OS.kATSUColorTag && size[0] is RGBColor.sizeof) {
//                                    int valuePtr = OS.CFDataGetBytePtr (values [0]);
//                                  OS.memmove (color, valuePtr + valueOffset, RGBColor.sizeof);
//                                  int red = (color.red >> 8) & 0xFF;
//                                  int green = (color.green >> 8) & 0xFF;
//                                  int blue =  (color.blue >> 8) & 0xFF;
//                                  rgb = new RGB (red, green, blue);
//                                    break ;
//                                }
//                                valueOffset = size[0];
//                            }
//                      }
//                  }
//              }
//          }
//          break;
//  }
//  return OS.noErr;
//}
    
/**
 * Makes the dialog visible and brings it to the front
 * of the display.
 *
 * @return a FontData object describing the font that was selected,
 *         or null if the dialog was cancelled or an error occurred
 *
 * @exception DWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
 * </ul>
 */
public FontData open () {
    Display display = parent !is null ? parent.display : Display.getCurrent ();
    
    NSFontPanel panel = NSFontPanel.sharedFontPanel();
    panel.setTitle(NSString.stringWith(title !is null ? title : ""));
    if (fontData !is null) {
        Font font = new Font(display, fontData);
        NSFontManager.sharedFontManager().setSelectedFont(font.handle, false);
        font.dispose();
    }
    SWTPanelDelegate delegate = (SWTPanelDelegate)new SWTPanelDelegate().alloc().init();
    int jniRef = OS.NewGlobalRef(this);
    if (jniRef is 0) DWT.error(DWT.ERROR_NO_HANDLES);
    delegate.setTag(jniRef);
    panel.setDelegate(delegate);
    fontData = null;
    panel.orderFront(null);
    NSApplication.sharedApplication().runModalForWindow_(panel);
    panel.setDelegate(null);
    delegate.release();
    OS.DeleteGlobalRef(jniRef);
    NSFont font = NSFontManager.sharedFontManager().selectedFont();
    if (font !is null) {
        //TODO - this does work
        fontData = Font.cocoa_new(display, font).getFontData()[0];
    }
    return fontData;
}

/**
 * Sets a FontData object describing the font to be
 * selected by default in the dialog, or null to let
 * the platform choose one.
 * 
 * @param fontData the FontData to use initially, or null
 * @deprecated use #setFontList (FontData [])
 */
public void setFontData (FontData fontData) {
    this.fontData = fontData;
}

/**
 * Sets the set of FontData objects describing the font to
 * be selected by default in the dialog, or null to let
 * the platform choose one.
 * 
 * @param fontData the set of FontData objects to use initially, or null
 *        to let the platform select a default when open() is called
 *
 * @see Font#getFontData
 * 
 * @since 2.1.1
 */
public void setFontList (FontData [] fontData) {
    if (fontData !is null && fontData.length > 0) {
        this.fontData = fontData [0];
    } else {
        this.fontData = null;
    }
}

/**
 * Sets the RGB describing the color to be selected by default
 * in the dialog, or null to let the platform choose one.
 *
 * @param rgb the RGB value to use initially, or null to let
 *        the platform select a default when open() is called
 *
 * @see PaletteData#getRGBs
 * 
 * @since 2.1
 */
public void setRGB (RGB rgb) {
    this.rgb = rgb;
}

void windowWillClose(int sender) {
    NSApplication.sharedApplication().stop(null);
}

}