Java tutorial
/* 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; } } }