1 /* CSSColor.java -- Converts CSS color values
2    Copyright (C) 2006 Free Software Foundation, Inc.
3 
4 This file is part of GNU Classpath.
5 
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10 
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 General Public License for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING.  If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301 USA.
20 
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library.  Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25 
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module.  An independent module is a module which is not derived from
33 or based on this library.  If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so.  If you do not wish to do so, delete this
36 exception statement from your version. */
37 
38 
39 package gnu.javax.swing.text.html.css;
40 
41 import java.awt.Color;
42 import java.util.HashMap;
43 import java.util.Iterator;
44 import java.util.Set;
45 
46 /**
47  * Converts CSS color values into AWT Color values.
48  *
49  * @author Roman Kennke (kennke@aicas.com)
50  */
51 public class CSSColor
52 {
53 
54   private static final HashMap COLOR_MAP;
55   static
56   {
57     COLOR_MAP = new HashMap();
58     COLOR_MAP.put("maroon", "#800000");
59     COLOR_MAP.put("red", "#ff0000");
60     COLOR_MAP.put("orange", "#ffa500");
61     COLOR_MAP.put("yellow", "#ffff00");
62     COLOR_MAP.put("olive", "#808000");
63     COLOR_MAP.put("purple", "#800080");
64     COLOR_MAP.put("fuchsia", "#ff00ff");
65     COLOR_MAP.put("white", "#ffffff");
66     COLOR_MAP.put("lime", "#00ff00");
67     COLOR_MAP.put("green", "#008000");
68     COLOR_MAP.put("navy", "#000080");
69     COLOR_MAP.put("blue", "#0000ff");
70     COLOR_MAP.put("aqua", "#00ffff");
71     COLOR_MAP.put("teal", "#008080");
72     COLOR_MAP.put("black", "#000000");
73     COLOR_MAP.put("silver", "#c0c0c0");
74     COLOR_MAP.put("gray", "#808080");
75   }
76 
77   /**
78    * The CSS value.
79    */
80   private String value;
81 
82   /**
83    * The converted color.
84    */
85   private Color color;
86 
87   /**
88    * Creates a new instance.
89    *
90    * @param val the CSS value
91    */
CSSColor(String val)92   public CSSColor(String val)
93   {
94     value = val;
95     color = convertValue(value);
96   }
97 
98   /**
99    * Converts a CSS color value to an AWT color.
100    *
101    * @param value the CSS color value
102    *
103    * @return the converted color value
104    */
convertValue(String value)105   public static Color convertValue(String value)
106   {
107     Color color;
108     String val1 = value.toLowerCase();
109     if (val1.charAt(0) != '#')
110       val1 = (String) COLOR_MAP.get(val1);
111     if (val1 != null)
112       {
113         String hexVal = val1.substring(1).trim();
114         try
115           {
116             int rgb = Integer.parseInt(hexVal, 16);
117             color = new Color(rgb);
118           }
119         catch (NumberFormatException ex)
120           {
121             color = Color.BLACK;
122           }
123       }
124     else
125       color = null;
126     return color;
127   }
128 
129   /**
130    * Returns the converted color.
131    *
132    * @return the converted color
133    */
getValue()134   public Color getValue()
135   {
136     return color;
137   }
138 
toString()139   public String toString()
140   {
141     return value;
142   }
143 
144   /**
145    * Returns <code>true</code> if the specified value is a valid color value,
146    * <code>false</code> otherwise.
147    *
148    * @param val the value to check
149    *
150    * @return <code>true</code> if the specified value is a valid color value,
151    *         <code>false</code> otherwise
152    */
isValidColor(String val)153   public static boolean isValidColor(String val)
154   {
155     boolean ret = false;
156     if (val.charAt(0) == '#')
157       ret = true;
158     else
159       {
160         Set colors = COLOR_MAP.keySet();
161         for (Iterator i = colors.iterator(); i.hasNext() && ret == false;)
162           {
163             String color = (String) i.next();
164             if (color.equalsIgnoreCase(val))
165               ret = true;
166           }
167       }
168     return ret;
169   }
170 }
171