/*
 * SVG Salamander
 * Copyright (c) 2004, Mark McKay
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 *   - Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the following
 *     disclaimer.
 *   - Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials 
 *     provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 * 
 * Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
 * projects can be found at http://www.kitfox.com
 *
 * Created on January 26, 2004, 4:34 AM
 */

package com.kitfox.svg.xml;

import java.awt.*;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author Mark McKay
 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
 */
public class ColorTable 
{

    static final Map<String, Color> colorTable;
    static {
        HashMap<String, Color> table = new HashMap<String, Color>();

	//We really should be interpreting the currentColor keyword as 
        // a reference to the referring node's color, but this quick hack 
        // will stop the program from crashing.
        table.put("currentcolor", new Color(0x0));

        table.put("aliceblue", new Color(0xf0f8ff));
        table.put("antiquewhite", new Color(0xfaebd7));
        table.put("aqua", new Color(0x00ffff));
        table.put("aquamarine", new Color(0x7fffd4));
        table.put("azure", new Color(0xf0ffff));
        table.put("beige", new Color(0xf5f5dc));
        table.put("bisque", new Color(0xffe4c4));
        table.put("black", new Color(0x000000));
        table.put("blanchedalmond", new Color(0xffebcd));
        table.put("blue", new Color(0x0000ff));
        table.put("blueviolet", new Color(0x8a2be2));
        table.put("brown", new Color(0xa52a2a));
        table.put("burlywood", new Color(0xdeb887));
        table.put("cadetblue", new Color(0x5f9ea0));
        table.put("chartreuse", new Color(0x7fff00));
        table.put("chocolate", new Color(0xd2691e));
        table.put("coral", new Color(0xff7f50));
        table.put("cornflowerblue", new Color(0x6495ed));
        table.put("cornsilk", new Color(0xfff8dc));
        table.put("crimson", new Color(0xdc143c));
        table.put("cyan", new Color(0x00ffff));
        table.put("darkblue", new Color(0x00008b));
        table.put("darkcyan", new Color(0x008b8b));
        table.put("darkgoldenrod", new Color(0xb8860b));
        table.put("darkgray", new Color(0xa9a9a9));
        table.put("darkgreen", new Color(0x006400));
        table.put("darkkhaki", new Color(0xbdb76b));
        table.put("darkmagenta", new Color(0x8b008b));
        table.put("darkolivegreen", new Color(0x556b2f));
        table.put("darkorange", new Color(0xff8c00));
        table.put("darkorchid", new Color(0x9932cc));
        table.put("darkred", new Color(0x8b0000));
        table.put("darksalmon", new Color(0xe9967a));
        table.put("darkseagreen", new Color(0x8fbc8f));
        table.put("darkslateblue", new Color(0x483d8b));
        table.put("darkslategray", new Color(0x2f4f4f));
        table.put("darkturquoise", new Color(0x00ced1));
        table.put("darkviolet", new Color(0x9400d3));
        table.put("deeppink", new Color(0xff1493));
        table.put("deepskyblue", new Color(0x00bfff));
        table.put("dimgray", new Color(0x696969));
        table.put("dodgerblue", new Color(0x1e90ff));
        table.put("feldspar", new Color(0xd19275));
        table.put("firebrick", new Color(0xb22222));
        table.put("floralwhite", new Color(0xfffaf0));
        table.put("forestgreen", new Color(0x228b22));
        table.put("fuchsia", new Color(0xff00ff));
        table.put("gainsboro", new Color(0xdcdcdc));
        table.put("ghostwhite", new Color(0xf8f8ff));
        table.put("gold", new Color(0xffd700));
        table.put("goldenrod", new Color(0xdaa520));
        table.put("gray", new Color(0x808080));
        table.put("green", new Color(0x008000));
        table.put("greenyellow", new Color(0xadff2f));
        table.put("honeydew", new Color(0xf0fff0));
        table.put("hotpink", new Color(0xff69b4));
        table.put("indianred", new Color(0xcd5c5c));
        table.put("indigo", new Color(0x4b0082));
        table.put("ivory", new Color(0xfffff0));
        table.put("khaki", new Color(0xf0e68c));
        table.put("lavender", new Color(0xe6e6fa));
        table.put("lavenderblush", new Color(0xfff0f5));
        table.put("lawngreen", new Color(0x7cfc00));
        table.put("lemonchiffon", new Color(0xfffacd));
        table.put("lightblue", new Color(0xadd8e6));
        table.put("lightcoral", new Color(0xf08080));
        table.put("lightcyan", new Color(0xe0ffff));
        table.put("lightgoldenrodyellow", new Color(0xfafad2));
        table.put("lightgrey", new Color(0xd3d3d3));
        table.put("lightgreen", new Color(0x90ee90));
        table.put("lightpink", new Color(0xffb6c1));
        table.put("lightsalmon", new Color(0xffa07a));
        table.put("lightseagreen", new Color(0x20b2aa));
        table.put("lightskyblue", new Color(0x87cefa));
        table.put("lightslateblue", new Color(0x8470ff));
        table.put("lightslategray", new Color(0x778899));
        table.put("lightsteelblue", new Color(0xb0c4de));
        table.put("lightyellow", new Color(0xffffe0));
        table.put("lime", new Color(0x00ff00));
        table.put("limegreen", new Color(0x32cd32));
        table.put("linen", new Color(0xfaf0e6));
        table.put("magenta", new Color(0xff00ff));
        table.put("maroon", new Color(0x800000));
        table.put("mediumaquamarine", new Color(0x66cdaa));
        table.put("mediumblue", new Color(0x0000cd));
        table.put("mediumorchid", new Color(0xba55d3));
        table.put("mediumpurple", new Color(0x9370d8));
        table.put("mediumseagreen", new Color(0x3cb371));
        table.put("mediumslateblue", new Color(0x7b68ee));
        table.put("mediumspringgreen", new Color(0x00fa9a));
        table.put("mediumturquoise", new Color(0x48d1cc));
        table.put("mediumvioletred", new Color(0xc71585));
        table.put("midnightblue", new Color(0x191970));
        table.put("mintcream", new Color(0xf5fffa));
        table.put("mistyrose", new Color(0xffe4e1));
        table.put("moccasin", new Color(0xffe4b5));
        table.put("navajowhite", new Color(0xffdead));
        table.put("navy", new Color(0x000080));
        table.put("oldlace", new Color(0xfdf5e6));
        table.put("olive", new Color(0x808000));
        table.put("olivedrab", new Color(0x6b8e23));
        table.put("orange", new Color(0xffa500));
        table.put("orangered", new Color(0xff4500));
        table.put("orchid", new Color(0xda70d6));
        table.put("palegoldenrod", new Color(0xeee8aa));
        table.put("palegreen", new Color(0x98fb98));
        table.put("paleturquoise", new Color(0xafeeee));
        table.put("palevioletred", new Color(0xd87093));
        table.put("papayawhip", new Color(0xffefd5));
        table.put("peachpuff", new Color(0xffdab9));
        table.put("peru", new Color(0xcd853f));
        table.put("pink", new Color(0xffc0cb));
        table.put("plum", new Color(0xdda0dd));
        table.put("powderblue", new Color(0xb0e0e6));
        table.put("purple", new Color(0x800080));
        table.put("red", new Color(0xff0000));
        table.put("rosybrown", new Color(0xbc8f8f));
        table.put("royalblue", new Color(0x4169e1));
        table.put("saddlebrown", new Color(0x8b4513));
        table.put("salmon", new Color(0xfa8072));
        table.put("sandybrown", new Color(0xf4a460));
        table.put("seagreen", new Color(0x2e8b57));
        table.put("seashell", new Color(0xfff5ee));
        table.put("sienna", new Color(0xa0522d));
        table.put("silver", new Color(0xc0c0c0));
        table.put("skyblue", new Color(0x87ceeb));
        table.put("slateblue", new Color(0x6a5acd));
        table.put("slategray", new Color(0x708090));
        table.put("snow", new Color(0xfffafa));
        table.put("springgreen", new Color(0x00ff7f));
        table.put("steelblue", new Color(0x4682b4));
        table.put("tan", new Color(0xd2b48c));
        table.put("teal", new Color(0x008080));
        table.put("thistle", new Color(0xd8bfd8));
        table.put("tomato", new Color(0xff6347));
        table.put("turquoise", new Color(0x40e0d0));
        table.put("violet", new Color(0xee82ee));
        table.put("violetred", new Color(0xd02090));
        table.put("wheat", new Color(0xf5deb3));
        table.put("white", new Color(0xffffff));
        table.put("whitesmoke", new Color(0xf5f5f5));
        table.put("yellow", new Color(0xffff00));
        table.put("yellowgreen", new Color(0x9acd32));
        
        colorTable = Collections.unmodifiableMap(table);
    }

    static ColorTable singleton = new ColorTable();

    /** Creates a new instance of ColorTable */
    protected ColorTable() {
//        buildColorList();
    }

    static public ColorTable instance() { return singleton; }

    public Color lookupColor(String name) {
        return colorTable.get(name.toLowerCase());
    }

    public static Color parseColor(String val)
    {
        Color retVal = null;

        if ("".equals(val))
        {
            return null;
        }
        
        if (val.charAt(0) == '#')
        {
            String hexStrn = val.substring(1);
            
            if (hexStrn.length() == 3)
            {
                hexStrn = "" + hexStrn.charAt(0) + hexStrn.charAt(0) + hexStrn.charAt(1) + hexStrn.charAt(1) + hexStrn.charAt(2) + hexStrn.charAt(2);
            }
            int hexVal = parseHex(hexStrn);

            retVal = new Color(hexVal);
        }
        else
        {
            final String number = "\\s*(((\\d+)(\\.\\d*)?)|(\\.\\d+))(%)?\\s*";
            final Matcher rgbMatch = Pattern.compile("rgb\\(" + number + "," + number + "," + number + "\\)", Pattern.CASE_INSENSITIVE).matcher("");

            rgbMatch.reset(val);
            if (rgbMatch.matches())
            {
                float rr = Float.parseFloat(rgbMatch.group(1));
                float gg = Float.parseFloat(rgbMatch.group(7));
                float bb = Float.parseFloat(rgbMatch.group(13));
                rr /= "%".equals(rgbMatch.group(6)) ? 100 : 255;
                gg /= "%".equals(rgbMatch.group(12)) ? 100 : 255;
                bb /= "%".equals(rgbMatch.group(18)) ? 100 : 255;
                retVal = new Color(rr, gg, bb);
            }
            else
            {
                Color lookupCol = ColorTable.instance().lookupColor(val);
                if (lookupCol != null) retVal = lookupCol;
            }
        }

        return retVal;
    }

    public static int parseHex(String val)
    {
        int retVal = 0;
        
        for (int i = 0; i < val.length(); i++)
        {
            retVal <<= 4;
            
            char ch = val.charAt(i);
            if (ch >= '0' && ch <= '9')
            {
                retVal |= ch - '0';
            }
            else if (ch >= 'a' && ch <= 'z')
            {
                retVal |= ch - 'a' + 10;
            }
            else if (ch >= 'A' && ch <= 'Z')
            {
                retVal |= ch - 'A' + 10;
            }
            else throw new RuntimeException();
        }
        
        return retVal;
    }

}
