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Color Factory

/*     GNU LESSER GENERAL PUBLIC LICENSE     Copyright (C) 2006 The Lobo Project     This library is free software; you can redistribute it and/or     modify it under the terms of the GNU Lesser General Public     License as published by the Free Software Foundation; either     version 2.1 of the License, or (at your option) any later version.     This library is distributed in the hope that it will be useful,     but WITHOUT ANY WARRANTY; without even the implied warranty of     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     Lesser General Public License for more details.     You should have received a copy of the GNU Lesser General Public     License along with this library; if not, write to the Free Software     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA     Contact info: lobochief@users.sourceforge.net */ /*  * Created on Apr 17, 2005  */ import java.util.*; import java.util.logging.*; import java.awt.*; /**  * @author J. H. S.  */ public class ColorFactory {   private static final Logger logger = Logger.getLogger(ColorFactory.class.getName());   public static final Color TRANSPARENT = new Color(0, 0, 0, 0);   private static ColorFactory instance;   private final Map colorMap = new HashMap(256);      private ColorFactory() {     Map colorMap = this.colorMap;     synchronized(this) {             colorMap.put("transparent", TRANSPARENT);       //http://www.w3schools.com/css/css_colornames.asp       colorMap.put("aliceblue", new Color(0xf0f8ff));       colorMap.put("antiquewhite", new Color(0xfaebd7));       colorMap.put("aqua", new Color(0x00ffff));       colorMap.put("aquamarine", new Color(0x7fffd4));       colorMap.put("azure", new Color(0xf0ffff));       colorMap.put("beige", new Color(0xf5f5dc));       colorMap.put("bisque", new Color(0xffe4c4));       colorMap.put("black", new Color(0x000000));       colorMap.put("blanchedalmond", new Color(0xffebcd));       colorMap.put("blue", new Color(0x0000ff));       colorMap.put("blueviolet", new Color(0x8a2be2));       colorMap.put("brown", new Color(0xa52a2a));       colorMap.put("burlywood", new Color(0xdeb887));       colorMap.put("cadetblue", new Color(0x5f9ea0));       colorMap.put("chartreuse", new Color(0x7fff00));       colorMap.put("chocolate", new Color(0xd2691e));       colorMap.put("coral", new Color(0xff7f50));       colorMap.put("cornflowerblue", new Color(0x6495ed));       colorMap.put("cornsilk", new Color(0xfff8dc));       colorMap.put("crimson", new Color(0xdc143c));       colorMap.put("cyan", new Color(0x00ffff));       colorMap.put("darkblue", new Color(0x00008b));       colorMap.put("darkcyan", new Color(0x008b8b));       colorMap.put("darkgoldenrod", new Color(0xb8860b));       colorMap.put("darkgray", new Color(0xa9a9a9));       colorMap.put("darkgrey", new Color(0xa9a9a9));       colorMap.put("darkgreen", new Color(0x006400));       colorMap.put("darkkhaki", new Color(0xbdb76b));       colorMap.put("darkmagenta", new Color(0x8b008b));       colorMap.put("darkolivegreen", new Color(0x556b2f));       colorMap.put("darkorange", new Color(0xff8c00));       colorMap.put("darkorchid", new Color(0x9932cc));       colorMap.put("darkred", new Color(0x8b0000));       colorMap.put("darksalmon", new Color(0xe9967a));       colorMap.put("darkseagreen", new Color(0x8fbc8f));       colorMap.put("darkslateblue", new Color(0x483d8b));       colorMap.put("darkslategray", new Color(0x2f4f4f));       colorMap.put("darkslategrey", new Color(0x2f4f4f));       colorMap.put("darkturquoise", new Color(0x00ced1));       colorMap.put("darkviolet", new Color(0x9400d3));       colorMap.put("deeppink", new Color(0xff1493));       colorMap.put("deepskyblue", new Color(0x00bfff));       colorMap.put("dimgray", new Color(0x696969));       colorMap.put("dimgrey", new Color(0x696969));       colorMap.put("dodgerblue", new Color(0x1e90ff));       colorMap.put("firebrick", new Color(0xb22222));       colorMap.put("floralwhite", new Color(0xfffaf0));       colorMap.put("forestgreen", new Color(0x228b22));       colorMap.put("fuchsia", new Color(0xff00ff));       colorMap.put("gainsboro", new Color(0xdcdcdc));       colorMap.put("ghostwhite", new Color(0xf8f8ff));       colorMap.put("gold", new Color(0xffd700));       colorMap.put("goldenrod", new Color(0xdaa520));       colorMap.put("gray", new Color(0x808080));       colorMap.put("grey", new Color(0x808080));       colorMap.put("green", new Color(0x008000));       colorMap.put("greenyellow", new Color(0xadff2f));       colorMap.put("honeydew", new Color(0xf0fff0));       colorMap.put("hotpink", new Color(0xff69b4));       colorMap.put("indianred", new Color(0xcd5c5c));       colorMap.put("indigo", new Color(0x4b0082));       colorMap.put("ivory", new Color(0xfffff0));       colorMap.put("khaki", new Color(0xf0e68c));       colorMap.put("lavender", new Color(0xe6e6fa));       colorMap.put("lavenderblush", new Color(0xfff0f5));       colorMap.put("lawngreen", new Color(0x7cfc00));       colorMap.put("lemonchiffon", new Color(0xfffacd));       colorMap.put("lightblue", new Color(0xadd8e6));       colorMap.put("lightcoral", new Color(0xf08080));       colorMap.put("lightcyan", new Color(0xe0ffff));       colorMap.put("lightgoldenrodyellow", new Color(0xfafad2));       colorMap.put("lightgray", new Color(0xd3d3d3));       colorMap.put("lightgrey", new Color(0xd3d3d3));       colorMap.put("lightgreen", new Color(0x90ee90));       colorMap.put("lightpink", new Color(0xffb6c1));       colorMap.put("lightsalmon", new Color(0xffa07a));       colorMap.put("lightseagreen", new Color(0x20b2aa));       colorMap.put("lightskyblue", new Color(0x87cefa));       colorMap.put("lightslategray", new Color(0x778899));       colorMap.put("lightslategrey", new Color(0x778899));       colorMap.put("lightsteelblue", new Color(0xb0c4de));       colorMap.put("lightyellow", new Color(0xffffe0));       colorMap.put("lime", new Color(0x00ff00));       colorMap.put("limegreen", new Color(0x32cd32));       colorMap.put("linen", new Color(0xfaf0e6));       colorMap.put("magenta", new Color(0xff00ff));       colorMap.put("maroon", new Color(0x800000));       colorMap.put("mediumaquamarine", new Color(0x66cdaa));       colorMap.put("mediumblue", new Color(0x0000cd));       colorMap.put("mediumorchid", new Color(0xba55d3));       colorMap.put("mediumpurple", new Color(0x9370d8));       colorMap.put("mediumseagreen", new Color(0x3cb371));       colorMap.put("mediumslateblue", new Color(0x7b68ee));       colorMap.put("mediumspringgreen", new Color(0x00fa9a));       colorMap.put("mediumturquoise", new Color(0x48d1cc));       colorMap.put("mediumvioletred", new Color(0xc71585));       colorMap.put("midnightblue", new Color(0x191970));       colorMap.put("mintcream", new Color(0xf5fffa));       colorMap.put("mistyrose", new Color(0xffe4e1));       colorMap.put("moccasin", new Color(0xffe4b5));       colorMap.put("navajowhite", new Color(0xffdead));       colorMap.put("navy", new Color(0x000080));       colorMap.put("oldlace", new Color(0xfdf5e6));       colorMap.put("olive", new Color(0x808000));       colorMap.put("olivedrab", new Color(0x6b8e23));       colorMap.put("orange", new Color(0xffa500));       colorMap.put("orangered", new Color(0xff4500));       colorMap.put("orchid", new Color(0xda70d6));       colorMap.put("palegoldenrod", new Color(0xeee8aa));       colorMap.put("palegreen", new Color(0x98fb98));       colorMap.put("paleturquoise", new Color(0xafeeee));       colorMap.put("palevioletred", new Color(0xd87093));       colorMap.put("papayawhip", new Color(0xffefd5));       colorMap.put("peachpuff", new Color(0xffdab9));       colorMap.put("peru", new Color(0xcd853f));       colorMap.put("pink", new Color(0xffc0cb));       colorMap.put("plum", new Color(0xdda0dd));       colorMap.put("powderblue", new Color(0xb0e0e6));       colorMap.put("purple", new Color(0x800080));       colorMap.put("red", new Color(0xff0000));       colorMap.put("rosybrown", new Color(0xbc8f8f));       colorMap.put("royalblue", new Color(0x4169e1));       colorMap.put("saddlebrown", new Color(0x8b4513));       colorMap.put("salmon", new Color(0xfa8072));       colorMap.put("sandybrown", new Color(0xf4a460));       colorMap.put("seagreen", new Color(0x2e8b57));       colorMap.put("seashell", new Color(0xfff5ee));       colorMap.put("sienna", new Color(0xa0522d));       colorMap.put("silver", new Color(0xc0c0c0));       colorMap.put("skyblue", new Color(0x87ceeb));       colorMap.put("slateblue", new Color(0x6a5acd));       colorMap.put("slategray", new Color(0x708090));       colorMap.put("slategrey", new Color(0x708090));       colorMap.put("snow", new Color(0xfffafa));       colorMap.put("springgreen", new Color(0x00ff7f));       colorMap.put("steelblue", new Color(0x4682b4));       colorMap.put("tan", new Color(0xd2b48c));       colorMap.put("teal", new Color(0x008080));       colorMap.put("thistle", new Color(0xd8bfd8));       colorMap.put("tomato", new Color(0xff6347));       colorMap.put("turquoise", new Color(0x40e0d0));       colorMap.put("violet", new Color(0xee82ee));       colorMap.put("wheat", new Color(0xf5deb3));       colorMap.put("white", new Color(0xffffff));       colorMap.put("whitesmoke", new Color(0xf5f5f5));       colorMap.put("yellow", new Color(0xffff00));       colorMap.put("yellowgreen", new Color(0x9acd32));     }   }    public static final ColorFactory getInstance() {     if(instance == null) {       synchronized(ColorFactory.class) {         if(instance == null) {           instance = new ColorFactory();         }       }     }     return instance;   }      private static final String RGB_START = "rgb(";      public boolean isColor(String colorSpec) {     if(colorSpec.startsWith("#")) {       return true;     }     String normalSpec = colorSpec.toLowerCase();     if(normalSpec.startsWith(RGB_START)) {       return true;     }     synchronized(this) {       return colorMap.containsKey(normalSpec);     }   }      public Color getColor(String colorSpec) {     String normalSpec = colorSpec.toLowerCase();     synchronized(this) {       Color color = (Color) colorMap.get(normalSpec);       if(color == null) {         if(normalSpec.startsWith(RGB_START)) {           // CssParser produces this format.                     int endIdx = normalSpec.lastIndexOf(')');           String commaValues = endIdx == -1 ? normalSpec.substring(RGB_START.length()) : normalSpec.substring(RGB_START.length(), endIdx);           StringTokenizer tok = new StringTokenizer(commaValues, ",");           int r = 0, g = 0, b = 0;           if(tok.hasMoreTokens()) {             String rstr = tok.nextToken().trim();             try {               r = Integer.parseInt(rstr);             } catch(NumberFormatException nfe) {               // ignore             }             if(tok.hasMoreTokens()) {               String gstr = tok.nextToken().trim();               try {                 g = Integer.parseInt(gstr);               } catch(NumberFormatException nfe) {                 // ignore               }               if(tok.hasMoreTokens()) {                 String bstr = tok.nextToken().trim();                 try {                   b = Integer.parseInt(bstr);                 } catch(NumberFormatException nfe) {                   // ignore                 }               }             }           }           color = new Color(r, g, b);         }         else if(normalSpec.startsWith("#")) {           //TODO: OPTIMIZE: It would be more efficient to           //create new Color(hex), but CssParser doesn't           //give us values formatted with "#" either way.           int len = normalSpec.length();           int[] rgba = new int[4];           rgba[3] = 255;           for(int i = 0; i < rgba.length; i++)            {             int idx = 2 * i + 1;             if(idx < len)              {               String hexText = normalSpec.substring(idx, idx + Math.min(2, len - idx));               try {                 rgba[i] = Integer.parseInt(hexText, 16);               } catch(NumberFormatException nfe) {                 // Ignore               }             }           }                  color = new Color(rgba[0], rgba[1], rgba[2], rgba[3]);         }         else {           if(logger.isLoggable(Level.INFO)) {             logger.warning("getColor(): Color spec [" + normalSpec + "] unknown.");           }           return Color.RED;         }         colorMap.put(normalSpec, color);       }       return color;     }   }       }