1 /*
   2  * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package javafx.css.converter;
  27 
  28 import javafx.css.ParsedValue;
  29 import javafx.css.StyleConverter;
  30 import javafx.scene.paint.Color;
  31 import javafx.scene.text.Font;
  32 
  33 /**
  34  * @since 9
  35  */
  36 public final class ColorConverter extends StyleConverter<String, Color> {
  37 
  38     private static class Holder {
  39         static final ColorConverter COLOR_INSTANCE = new ColorConverter();
  40     }
  41 
  42     // lazy, thread-safe instatiation
  43     public static StyleConverter<String, Color> getInstance() {
  44         return Holder.COLOR_INSTANCE;
  45     }
  46 
  47     private ColorConverter() {
  48         super();
  49     }
  50 
  51     @Override
  52     public Color convert(ParsedValue<String, Color> value, Font font) {
  53         Object val = value.getValue();
  54         if (val == null) {
  55             return null;
  56         }
  57         if (val instanceof Color) {
  58             return (Color)val;
  59         }
  60         if (val instanceof String) {
  61             String str = (String)val;
  62             if (str.isEmpty() || "null".equals(str)) {
  63                 return null;
  64             }
  65             try {
  66                 return Color.web((String)val);
  67             } catch (IllegalArgumentException iae) {
  68                 // fall through pending RT-34551
  69             }
  70         }
  71         // pending RT-34551
  72         System.err.println("not a color: " + value);
  73         return Color.BLACK;
  74     }
  75 
  76     @Override
  77     public String toString() {
  78         return "ColorConverter";
  79     }
  80 }