1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     4 

     5 package org.chromium.debug.ui.editors;

     6 

     7 import java.util.HashMap;

     8 import java.util.Map;

     9 

    10 import org.eclipse.swt.graphics.Color;

    11 import org.eclipse.swt.graphics.RGB;

    12 import org.eclipse.swt.widgets.Display;

    13 

    14 /**

    15  * Converts RGB to Color, reuses the existing Color instances.

    16  * A singleton.

    17  */

    18 public class EditorColors {

    19 

    20   private static final Map<Integer, Color> intToColor = new HashMap<Integer, Color>();

    21 

    22   public static Color getColor(RGB rgb) {

    23     Integer colorInt = rgbToInteger(rgb);

    24     Color color = intToColor.get(colorInt);

    25     if (color == null) {

    26       color = new Color(Display.getDefault(), rgb);

    27       intToColor.put(colorInt, color);

    28     }

    29     return color;

    30   }

    31 

    32   private static Integer rgbToInteger(RGB rgb) {

    33     return

    34         ((rgb.red & 0xFF) << 16) +

    35         ((rgb.green & 0xFF) << 8) +

    36         (rgb.blue & 0xFF);

    37   }

    38 }