WebColors.cs

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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text.RegularExpressions;
using iTextSharp.text;
using System.util;
using iTextSharp.text.error_messages;

namespace iTextSharp.text.html {

    /**
    * This class is a HashMap that contains the names of colors as a key and the
    * corresponding Color as value. (Source: Wikipedia
    * http://en.wikipedia.org/wiki/Web_colors )
    * 
    * @author blowagie
    * @deprecated since 5.5.2
    */
    [Obsolete]
    public class WebColors : Dictionary<string,int[]> {

        public static WebColors NAMES = new WebColors();
        static WebColors() {
            NAMES["aliceblue"] = new int[] { 0xf0, 0xf8, 0xff, 0xff };
            NAMES["antiquewhite"] = new int[] { 0xfa, 0xeb, 0xd7, 0xff };
            NAMES["aqua"] = new int[] { 0x00, 0xff, 0xff, 0xff };
            NAMES["aquamarine"] = new int[] { 0x7f, 0xff, 0xd4, 0xff };
            NAMES["azure"] = new int[] { 0xf0, 0xff, 0xff, 0xff };
            NAMES["beige"] = new int[] { 0xf5, 0xf5, 0xdc, 0xff };
            NAMES["bisque"] = new int[] { 0xff, 0xe4, 0xc4, 0xff };
            NAMES["black"] = new int[] { 0x00, 0x00, 0x00, 0xff };
            NAMES["blanchedalmond"] = new int[] { 0xff, 0xeb, 0xcd, 0xff };
            NAMES["blue"] = new int[] { 0x00, 0x00, 0xff, 0xff };
            NAMES["blueviolet"] = new int[] { 0x8a, 0x2b, 0xe2, 0xff };
            NAMES["brown"] = new int[] { 0xa5, 0x2a, 0x2a, 0xff };
            NAMES["burlywood"] = new int[] { 0xde, 0xb8, 0x87, 0xff };
            NAMES["cadetblue"] = new int[] { 0x5f, 0x9e, 0xa0, 0xff };
            NAMES["chartreuse"] = new int[] { 0x7f, 0xff, 0x00, 0xff };
            NAMES["chocolate"] = new int[] { 0xd2, 0x69, 0x1e, 0xff };
            NAMES["coral"] = new int[] { 0xff, 0x7f, 0x50, 0xff };
            NAMES["cornflowerblue"] = new int[] { 0x64, 0x95, 0xed, 0xff };
            NAMES["cornsilk"] = new int[] { 0xff, 0xf8, 0xdc, 0xff };
            NAMES["crimson"] = new int[] { 0xdc, 0x14, 0x3c, 0xff };
            NAMES["cyan"] = new int[] { 0x00, 0xff, 0xff, 0xff };
            NAMES["darkblue"] = new int[] { 0x00, 0x00, 0x8b, 0xff };
            NAMES["darkcyan"] = new int[] { 0x00, 0x8b, 0x8b, 0xff };
            NAMES["darkgoldenrod"] = new int[] { 0xb8, 0x86, 0x0b, 0xff };
            NAMES["darkgray"] = new int[] { 0xa9, 0xa9, 0xa9, 0xff };
            NAMES["darkgreen"] = new int[] { 0x00, 0x64, 0x00, 0xff };
            NAMES["darkkhaki"] = new int[] { 0xbd, 0xb7, 0x6b, 0xff };
            NAMES["darkmagenta"] = new int[] { 0x8b, 0x00, 0x8b, 0xff };
            NAMES["darkolivegreen"] = new int[] { 0x55, 0x6b, 0x2f, 0xff };
            NAMES["darkorange"] = new int[] { 0xff, 0x8c, 0x00, 0xff };
            NAMES["darkorchid"] = new int[] { 0x99, 0x32, 0xcc, 0xff };
            NAMES["darkred"] = new int[] { 0x8b, 0x00, 0x00, 0xff };
            NAMES["darksalmon"] = new int[] { 0xe9, 0x96, 0x7a, 0xff };
            NAMES["darkseagreen"] = new int[] { 0x8f, 0xbc, 0x8f, 0xff };
            NAMES["darkslateblue"] = new int[] { 0x48, 0x3d, 0x8b, 0xff };
            NAMES["darkslategray"] = new int[] { 0x2f, 0x4f, 0x4f, 0xff };
            NAMES["darkturquoise"] = new int[] { 0x00, 0xce, 0xd1, 0xff };
            NAMES["darkviolet"] = new int[] { 0x94, 0x00, 0xd3, 0xff };
            NAMES["deeppink"] = new int[] { 0xff, 0x14, 0x93, 0xff };
            NAMES["deepskyblue"] = new int[] { 0x00, 0xbf, 0xff, 0xff };
            NAMES["dimgray"] = new int[] { 0x69, 0x69, 0x69, 0xff };
            NAMES["dodgerblue"] = new int[] { 0x1e, 0x90, 0xff, 0xff };
            NAMES["firebrick"] = new int[] { 0xb2, 0x22, 0x22, 0xff };
            NAMES["floralwhite"] = new int[] { 0xff, 0xfa, 0xf0, 0xff };
            NAMES["forestgreen"] = new int[] { 0x22, 0x8b, 0x22, 0xff };
            NAMES["fuchsia"] = new int[] { 0xff, 0x00, 0xff, 0xff };
            NAMES["gainsboro"] = new int[] { 0xdc, 0xdc, 0xdc, 0xff };
            NAMES["ghostwhite"] = new int[] { 0xf8, 0xf8, 0xff, 0xff };
            NAMES["gold"] = new int[] { 0xff, 0xd7, 0x00, 0xff };
            NAMES["goldenrod"] = new int[] { 0xda, 0xa5, 0x20, 0xff };
            NAMES["gray"] = new int[] { 0x80, 0x80, 0x80, 0xff };
            NAMES["green"] = new int[] { 0x00, 0x80, 0x00, 0xff };
            NAMES["greenyellow"] = new int[] { 0xad, 0xff, 0x2f, 0xff };
            NAMES["honeydew"] = new int[] { 0xf0, 0xff, 0xf0, 0xff };
            NAMES["hotpink"] = new int[] { 0xff, 0x69, 0xb4, 0xff };
            NAMES["indianred"] = new int[] { 0xcd, 0x5c, 0x5c, 0xff };
            NAMES["indigo"] = new int[] { 0x4b, 0x00, 0x82, 0xff };
            NAMES["ivory"] = new int[] { 0xff, 0xff, 0xf0, 0xff };
            NAMES["khaki"] = new int[] { 0xf0, 0xe6, 0x8c, 0xff };
            NAMES["lavender"] = new int[] { 0xe6, 0xe6, 0xfa, 0xff };
            NAMES["lavenderblush"] = new int[] { 0xff, 0xf0, 0xf5, 0xff };
            NAMES["lawngreen"] = new int[] { 0x7c, 0xfc, 0x00, 0xff };
            NAMES["lemonchiffon"] = new int[] { 0xff, 0xfa, 0xcd, 0xff };
            NAMES["lightblue"] = new int[] { 0xad, 0xd8, 0xe6, 0xff };
            NAMES["lightcoral"] = new int[] { 0xf0, 0x80, 0x80, 0xff };
            NAMES["lightcyan"] = new int[] { 0xe0, 0xff, 0xff, 0xff };
            NAMES["lightgoldenrodyellow"] = new int[] { 0xfa, 0xfa, 0xd2, 0xff };
            NAMES["lightgreen"] = new int[] { 0x90, 0xee, 0x90, 0xff };
            NAMES["lightgrey"] = new int[] { 0xd3, 0xd3, 0xd3, 0xff };
            NAMES["lightpink"] = new int[] { 0xff, 0xb6, 0xc1, 0xff };
            NAMES["lightsalmon"] = new int[] { 0xff, 0xa0, 0x7a, 0xff };
            NAMES["lightseagreen"] = new int[] { 0x20, 0xb2, 0xaa, 0xff };
            NAMES["lightskyblue"] = new int[] { 0x87, 0xce, 0xfa, 0xff };
            NAMES["lightslategray"] = new int[] { 0x77, 0x88, 0x99, 0xff };
            NAMES["lightsteelblue"] = new int[] { 0xb0, 0xc4, 0xde, 0xff };
            NAMES["lightyellow"] = new int[] { 0xff, 0xff, 0xe0, 0xff };
            NAMES["lime"] = new int[] { 0x00, 0xff, 0x00, 0xff };
            NAMES["limegreen"] = new int[] { 0x32, 0xcd, 0x32, 0xff };
            NAMES["linen"] = new int[] { 0xfa, 0xf0, 0xe6, 0xff };
            NAMES["magenta"] = new int[] { 0xff, 0x00, 0xff, 0xff };
            NAMES["maroon"] = new int[] { 0x80, 0x00, 0x00, 0xff };
            NAMES["mediumaquamarine"] = new int[] { 0x66, 0xcd, 0xaa, 0xff };
            NAMES["mediumblue"] = new int[] { 0x00, 0x00, 0xcd, 0xff };
            NAMES["mediumorchid"] = new int[] { 0xba, 0x55, 0xd3, 0xff };
            NAMES["mediumpurple"] = new int[] { 0x93, 0x70, 0xdb, 0xff };
            NAMES["mediumseagreen"] = new int[] { 0x3c, 0xb3, 0x71, 0xff };
            NAMES["mediumslateblue"] = new int[] { 0x7b, 0x68, 0xee, 0xff };
            NAMES["mediumspringgreen"] = new int[] { 0x00, 0xfa, 0x9a, 0xff };
            NAMES["mediumturquoise"] = new int[] { 0x48, 0xd1, 0xcc, 0xff };
            NAMES["mediumvioletred"] = new int[] { 0xc7, 0x15, 0x85, 0xff };
            NAMES["midnightblue"] = new int[] { 0x19, 0x19, 0x70, 0xff };
            NAMES["mintcream"] = new int[] { 0xf5, 0xff, 0xfa, 0xff };
            NAMES["mistyrose"] = new int[] { 0xff, 0xe4, 0xe1, 0xff };
            NAMES["moccasin"] = new int[] { 0xff, 0xe4, 0xb5, 0xff };
            NAMES["navajowhite"] = new int[] { 0xff, 0xde, 0xad, 0xff };
            NAMES["navy"] = new int[] { 0x00, 0x00, 0x80, 0xff };
            NAMES["oldlace"] = new int[] { 0xfd, 0xf5, 0xe6, 0xff };
            NAMES["olive"] = new int[] { 0x80, 0x80, 0x00, 0xff };
            NAMES["olivedrab"] = new int[] { 0x6b, 0x8e, 0x23, 0xff };
            NAMES["orange"] = new int[] { 0xff, 0xa5, 0x00, 0xff };
            NAMES["orangered"] = new int[] { 0xff, 0x45, 0x00, 0xff };
            NAMES["orchid"] = new int[] { 0xda, 0x70, 0xd6, 0xff };
            NAMES["palegoldenrod"] = new int[] { 0xee, 0xe8, 0xaa, 0xff };
            NAMES["palegreen"] = new int[] { 0x98, 0xfb, 0x98, 0xff };
            NAMES["paleturquoise"] = new int[] { 0xaf, 0xee, 0xee, 0xff };
            NAMES["palevioletred"] = new int[] { 0xdb, 0x70, 0x93, 0xff };
            NAMES["papayawhip"] = new int[] { 0xff, 0xef, 0xd5, 0xff };
            NAMES["peachpuff"] = new int[] { 0xff, 0xda, 0xb9, 0xff };
            NAMES["peru"] = new int[] { 0xcd, 0x85, 0x3f, 0xff };
            NAMES["pink"] = new int[] { 0xff, 0xc0, 0xcb, 0xff };
            NAMES["plum"] = new int[] { 0xdd, 0xa0, 0xdd, 0xff };
            NAMES["powderblue"] = new int[] { 0xb0, 0xe0, 0xe6, 0xff };
            NAMES["purple"] = new int[] { 0x80, 0x00, 0x80, 0xff };
            NAMES["red"] = new int[] { 0xff, 0x00, 0x00, 0xff };
            NAMES["rosybrown"] = new int[] { 0xbc, 0x8f, 0x8f, 0xff };
            NAMES["royalblue"] = new int[] { 0x41, 0x69, 0xe1, 0xff };
            NAMES["saddlebrown"] = new int[] { 0x8b, 0x45, 0x13, 0xff };
            NAMES["salmon"] = new int[] { 0xfa, 0x80, 0x72, 0xff };
            NAMES["sandybrown"] = new int[] { 0xf4, 0xa4, 0x60, 0xff };
            NAMES["seagreen"] = new int[] { 0x2e, 0x8b, 0x57, 0xff };
            NAMES["seashell"] = new int[] { 0xff, 0xf5, 0xee, 0xff };
            NAMES["sienna"] = new int[] { 0xa0, 0x52, 0x2d, 0xff };
            NAMES["silver"] = new int[] { 0xc0, 0xc0, 0xc0, 0xff };
            NAMES["skyblue"] = new int[] { 0x87, 0xce, 0xeb, 0xff };
            NAMES["slateblue"] = new int[] { 0x6a, 0x5a, 0xcd, 0xff };
            NAMES["slategray"] = new int[] { 0x70, 0x80, 0x90, 0xff };
            NAMES["snow"] = new int[] { 0xff, 0xfa, 0xfa, 0xff };
            NAMES["springgreen"] = new int[] { 0x00, 0xff, 0x7f, 0xff };
            NAMES["steelblue"] = new int[] { 0x46, 0x82, 0xb4, 0xff };
            NAMES["tan"] = new int[] { 0xd2, 0xb4, 0x8c, 0xff };
            NAMES["teal"] = new int[] { 0x00, 0x80, 0x80, 0xff };
            NAMES["thistle"] = new int[] { 0xd8, 0xbf, 0xd8, 0xff };
            NAMES["tomato"] = new int[] { 0xff, 0x63, 0x47, 0xff };
            NAMES["transparent"] = new int[] { 0xff, 0xff, 0xff, 0x00 };
            NAMES["turquoise"] = new int[] { 0x40, 0xe0, 0xd0, 0xff };
            NAMES["violet"] = new int[] { 0xee, 0x82, 0xee, 0xff };
            NAMES["wheat"] = new int[] { 0xf5, 0xde, 0xb3, 0xff };
            NAMES["white"] = new int[] { 0xff, 0xff, 0xff, 0xff };
            NAMES["whitesmoke"] = new int[] { 0xf5, 0xf5, 0xf5, 0xff };
            NAMES["yellow"] = new int[] { 0xff, 0xff, 0x00, 0xff };
            NAMES["yellowgreen"] = new int[] { 0x9a, 0xcd, 0x32, 0xff };
        }

        /**
         * A web color string without the leading # will be 3 or 6 characters long
         * and all those characters will be hex digits. NOTE: colStr must be all
         * lower case or the current hex letter test will fail.
         * 
         * @param colStr
         *            A non-null, lower case string that might describe an RGB color
         *            in hex.
         * @return Is this a web color hex string without the leading #?
         * @since 5.0.6
         */
        private static bool MissingHashColorFormat(String colStr) {
            int len = colStr.Length;
            if (len == 3 || len == 6) {
                // and it just contains hex chars 0-9, a-f, A-F
                Regex match = new Regex("[0-9a-f]{" + len + "}");
                return match.IsMatch(colStr);
            }
            return false;
        }

        /**
         * Gives you a BaseColor based on a name.
         *
         * @param name
         *            a name such as black, violet, cornflowerblue or #RGB or
         *            #RRGGBB or RGB or RRGGBB or rgb(R,G,B)
         * @return the corresponding BaseColor object. Never returns null.
         * @throws IllegalArgumentException
         *             if the String isn't a know representation of a color.
         */
        public static BaseColor GetRGBColor(String name) {
            int[] color = {0, 0, 0, 255};
            String colorName = name.ToLower();
            bool colorStrWithoutHash = MissingHashColorFormat(colorName);
            if (colorName.StartsWith("#") || colorStrWithoutHash) {
                if (!colorStrWithoutHash) {
                    // lop off the # to unify hex parsing.
                    colorName = colorName.Substring(1);
                }
                if (colorName.Length == 3) {
                    String red = colorName.Substring(0, 1);
                    color[0] = int.Parse(red + red, NumberStyles.HexNumber);
                    String green = colorName.Substring(1, 1);
                    color[1] = int.Parse(green + green, NumberStyles.HexNumber);
                    String blue = colorName.Substring(2);
                    color[2] = int.Parse(blue + blue, NumberStyles.HexNumber);
                    return new BaseColor(color[0], color[1], color[2], color[3]);
                }
                if (colorName.Length == 6) {
                    color[0] = int.Parse(colorName.Substring(0, 2), NumberStyles.HexNumber);
                    color[1] = int.Parse(colorName.Substring(2, 2), NumberStyles.HexNumber);
                    color[2] = int.Parse(colorName.Substring(4), NumberStyles.HexNumber);
                    return new BaseColor(color[0], color[1], color[2], color[3]);
                }
                throw new FormatException(
                    MessageLocalization
                        .GetComposedMessage("unknown.color.format.must.be.rgb.or.rrggbb"));
            }

            if (colorName.StartsWith("rgb(")) {
                String delim = "rgb(), \t\r\n\f";
                StringTokenizer tok = new StringTokenizer(colorName, delim);
                for (int k = 0; k < 3; ++k) {
                    if (tok.HasMoreTokens()) {
                        color[k] = GetRGBChannelValue(tok.NextToken());
                        color[k] = Math.Max(0, color[k]);
                        color[k] = Math.Min(255, color[k]);
                    }
                }
                return new BaseColor(color[0], color[1], color[2], color[3]);
            }

            if (colorName.StartsWith("rgba(")) {
			    const String delim = "rgba(), \t\r\n\f";
			    StringTokenizer tok = new StringTokenizer(colorName, delim);
			    for (int k = 0; k < 3; ++k) {
				    if (tok.HasMoreTokens()) {
					    color[k] = GetRGBChannelValue(tok.NextToken());
					    color[k] = Math.Max(0, color[k]);
					    color[k] = Math.Min(255, color[k]);
				    }
			    }
			    if (tok.HasMoreTokens()) {
				    color[3] = (int)(255 * float.Parse(tok.NextToken(), CultureInfo.InvariantCulture) + 0.5);
			    }
			    return new BaseColor(color[0], color[1], color[2], color[3]);
		}

            if (!NAMES.ContainsKey(colorName)) {
                throw new FormatException(
                    MessageLocalization.GetComposedMessage("color.not.found",
                        new String[] {colorName}));
            }
            color = NAMES[colorName];
            return new BaseColor(color[0], color[1], color[2], color[3]);
        }

        private static int GetRGBChannelValue(String rgbChannel) {
            if (rgbChannel.EndsWith("%")) {
                return int.Parse(rgbChannel.Substring(0,
                    rgbChannel.Length - 1))*255/100;
            } else {
                return int.Parse(rgbChannel);
            }
        }
    }
}