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1
24 package org.riotfamily.common.util;
25
26 import java.awt.Color  ;
27 import java.util.HashMap ;
28 import java.util.regex.Matcher ;
29 import java.util.regex.Pattern ;
30
31
35 public final class ColorUtils {
36
37 private static final Pattern RGB_PATTERN = Pattern.compile(
38 "rgb\\(\\s?(\\d{1,3})%?\\s?,\\s?(\\d{1,3})%?\\s?," +
39 "\\s?(\\d{1,3})(%?)\\s?\\)");
40
41 private static HashMap namedColors = new HashMap ();
42
43 static {
44 namedColors.put("aliceblue", new Color (0xf0, 0xf8, 0xff));
45 namedColors.put("antiquewhite", new Color (0xfa, 0xeb, 0xd7));
46 namedColors.put("aqua", new Color (0x00, 0xff, 0xff));
47 namedColors.put("aquamarine", new Color (0x7f, 0xff, 0xd4));
48 namedColors.put("azure", new Color (0xf0, 0xff, 0xff));
49 namedColors.put("beige", new Color (0xf5, 0xf5, 0xdc));
50 namedColors.put("bisque", new Color (0xff, 0xe4, 0xc4));
51 namedColors.put("black", new Color (0x00, 0x00, 0x00));
52 namedColors.put("blanchedalmond", new Color (0xff, 0xeb, 0xcd));
53 namedColors.put("blue", new Color (0x00, 0x00, 0xff));
54 namedColors.put("blueviolet", new Color (0x8a, 0x2b, 0xe2));
55 namedColors.put("brown", new Color (0xa5, 0x2a, 0x2a));
56 namedColors.put("burlywood", new Color (0xde, 0xb8, 0x87));
57 namedColors.put("cadetblue", new Color (0x5f, 0x9e, 0xa0));
58 namedColors.put("chartreuse", new Color (0x7f, 0xff, 0x00));
59 namedColors.put("chocolate", new Color (0xd2, 0x69, 0x1e));
60 namedColors.put("coral", new Color (0xff, 0x7f, 0x50));
61 namedColors.put("cornflowerblue", new Color (0x64, 0x95, 0xed));
62 namedColors.put("cornsilk", new Color (0xff, 0xf8, 0xdc));
63 namedColors.put("crimson", new Color (0xdc, 0x14, 0x3c));
64 namedColors.put("cyan", new Color (0x00, 0xff, 0xff));
65 namedColors.put("darkblue", new Color (0x00, 0x00, 0x8b));
66 namedColors.put("darkcyan", new Color (0x00, 0x8b, 0x8b));
67 namedColors.put("darkgoldenrod", new Color (0xb8, 0x86, 0x0b));
68 namedColors.put("darkgray", new Color (0xa9, 0xa9, 0xa9));
69 namedColors.put("darkgrey", new Color (0xa9, 0xa9, 0xa9));
70 namedColors.put("darkgreen", new Color (0x00, 0x64, 0x00));
71 namedColors.put("darkkhaki", new Color (0xbd, 0xb7, 0x6b));
72 namedColors.put("darkmagenta", new Color (0x8b, 0x00, 0x8b));
73 namedColors.put("darkolivegreen", new Color (0x55, 0x6b, 0x2f));
74 namedColors.put("darkorange", new Color (0xff, 0x8c, 0x00));
75 namedColors.put("darkorchid", new Color (0x99, 0x32, 0xcc));
76 namedColors.put("darkred", new Color (0x8b, 0x00, 0x00));
77 namedColors.put("darksalmon", new Color (0xe9, 0x96, 0x7a));
78 namedColors.put("darkseagreen", new Color (0x8f, 0xbc, 0x8f));
79 namedColors.put("darkslateblue", new Color (0x48, 0x3d, 0x8b));
80 namedColors.put("darkslategray", new Color (0x2f, 0x4f, 0x4f));
81 namedColors.put("darkslategrey", new Color (0x2f, 0x4f, 0x4f));
82 namedColors.put("darkturquoise", new Color (0x00, 0xce, 0xd1));
83 namedColors.put("darkviolet", new Color (0x94, 0x00, 0xd3));
84 namedColors.put("deeppink", new Color (0xff, 0x14, 0x93));
85 namedColors.put("deepskyblue", new Color (0x00, 0xbf, 0xff));
86 namedColors.put("dimgray", new Color (0x69, 0x69, 0x69));
87 namedColors.put("dimgrey", new Color (0x69, 0x69, 0x69));
88 namedColors.put("dodgerblue", new Color (0x1e, 0x90, 0xff));
89 namedColors.put("firebrick", new Color (0xb2, 0x22, 0x22));
90 namedColors.put("floralwhite", new Color (0xff, 0xfa, 0xf0));
91 namedColors.put("forestgreen", new Color (0x22, 0x8b, 0x22));
92 namedColors.put("fuchsia", new Color (0xff, 0x00, 0xff));
93 namedColors.put("gainsboro", new Color (0xdc, 0xdc, 0xdc));
94 namedColors.put("ghostwhite", new Color (0xf8, 0xf8, 0xff));
95 namedColors.put("gold", new Color (0xff, 0xd7, 0x00));
96 namedColors.put("goldenrod", new Color (0xda, 0xa5, 0x20));
97 namedColors.put("gray", new Color (0x80, 0x80, 0x80));
98 namedColors.put("grey", new Color (0x80, 0x80, 0x80));
99 namedColors.put("green", new Color (0x00, 0x80, 0x00));
100 namedColors.put("greenyellow", new Color (0xad, 0xff, 0x2f));
101 namedColors.put("honeydew", new Color (0xf0, 0xff, 0xf0));
102 namedColors.put("hotpink", new Color (0xff, 0x69, 0xb4));
103 namedColors.put("indianred", new Color (0xcd, 0x5c, 0x5c));
104 namedColors.put("indigo", new Color (0x4b, 0x00, 0x82));
105 namedColors.put("ivory", new Color (0xff, 0xff, 0xf0));
106 namedColors.put("khaki", new Color (0xf0, 0xe6, 0x8c));
107 namedColors.put("lavender", new Color (0xe6, 0xe6, 0xfa));
108 namedColors.put("lavenderblush", new Color (0xff, 0xf0, 0xf5));
109 namedColors.put("lawngreen", new Color (0x7c, 0xfc, 0x00));
110 namedColors.put("lemonchiffon", new Color (0xff, 0xfa, 0xcd));
111 namedColors.put("lightblue", new Color (0xad, 0xd8, 0xe6));
112 namedColors.put("lightcoral", new Color (0xf0, 0x80, 0x80));
113 namedColors.put("lightcyan", new Color (0xe0, 0xff, 0xff));
114 namedColors.put("lightgoldenrodyellow", new Color (0xfa, 0xfa, 0xd2));
115 namedColors.put("lightgray", new Color (0xd3, 0xd3, 0xd3));
116 namedColors.put("lightgrey", new Color (0xd3, 0xd3, 0xd3));
117 namedColors.put("lightgreen", new Color (0x90, 0xee, 0x90));
118 namedColors.put("lightpink", new Color (0xff, 0xb6, 0xc1));
119 namedColors.put("lightsalmon", new Color (0xff, 0xa0, 0x7a));
120 namedColors.put("lightseagreen", new Color (0x20, 0xb2, 0xaa));
121 namedColors.put("lightskyblue", new Color (0x87, 0xce, 0xfa));
122 namedColors.put("lightslategray", new Color (0x77, 0x88, 0x99));
123 namedColors.put("lightslategrey", new Color (0x77, 0x88, 0x99));
124 namedColors.put("lightsteelblue", new Color (0xb0, 0xc4, 0xde));
125 namedColors.put("lightyellow", new Color (0xff, 0xff, 0xe0));
126 namedColors.put("lime", new Color (0x00, 0xff, 0x00));
127 namedColors.put("limegreen", new Color (0x32, 0xcd, 0x32));
128 namedColors.put("linen", new Color (0xfa, 0xf0, 0xe6));
129 namedColors.put("magenta", new Color (0xff, 0x00, 0xff));
130 namedColors.put("maroon", new Color (0x80, 0x00, 0x00));
131 namedColors.put("mediumaquamarine", new Color (0x66, 0xcd, 0xaa));
132 namedColors.put("mediumblue", new Color (0x00, 0x00, 0xcd));
133 namedColors.put("mediumorchid", new Color (0xba, 0x55, 0xd3));
134 namedColors.put("mediumpurple", new Color (0x93, 0x70, 0xd8));
135 namedColors.put("mediumseagreen", new Color (0x3c, 0xb3, 0x71));
136 namedColors.put("mediumslateblue", new Color (0x7b, 0x68, 0xee));
137 namedColors.put("mediumspringgreen", new Color (0x00, 0xfa, 0x9a));
138 namedColors.put("mediumturquoise", new Color (0x48, 0xd1, 0xcc));
139 namedColors.put("mediumvioletred", new Color (0xc7, 0x15, 0x85));
140 namedColors.put("midnightblue", new Color (0x19, 0x19, 0x70));
141 namedColors.put("mintcream", new Color (0xf5, 0xff, 0xfa));
142 namedColors.put("mistyrose", new Color (0xff, 0xe4, 0xe1));
143 namedColors.put("moccasin", new Color (0xff, 0xe4, 0xb5));
144 namedColors.put("navajowhite", new Color (0xff, 0xde, 0xad));
145 namedColors.put("navy", new Color (0x00, 0x00, 0x80));
146 namedColors.put("oldlace", new Color (0xfd, 0xf5, 0xe6));
147 namedColors.put("olive", new Color (0x80, 0x80, 0x00));
148 namedColors.put("olivedrab", new Color (0x6b, 0x8e, 0x23));
149 namedColors.put("orange", new Color (0xff, 0xa5, 0x00));
150 namedColors.put("orangered", new Color (0xff, 0x45, 0x00));
151 namedColors.put("orchid", new Color (0xda, 0x70, 0xd6));
152 namedColors.put("palegoldenrod", new Color (0xee, 0xe8, 0xaa));
153 namedColors.put("palegreen", new Color (0x98, 0xfb, 0x98));
154 namedColors.put("paleturquoise", new Color (0xaf, 0xee, 0xee));
155 namedColors.put("palevioletred", new Color (0xd8, 0x70, 0x93));
156 namedColors.put("papayawhip", new Color (0xff, 0xef, 0xd5));
157 namedColors.put("peachpuff", new Color (0xff, 0xda, 0xb9));
158 namedColors.put("peru", new Color (0xcd, 0x85, 0x3f));
159 namedColors.put("pink", new Color (0xff, 0xc0, 0xcb));
160 namedColors.put("plum", new Color (0xdd, 0xa0, 0xdd));
161 namedColors.put("powderblue", new Color (0xb0, 0xe0, 0xe6));
162 namedColors.put("purple", new Color (0x80, 0x00, 0x80));
163 namedColors.put("red", new Color (0xff, 0x00, 0x00));
164 namedColors.put("rosybrown", new Color (0xbc, 0x8f, 0x8f));
165 namedColors.put("royalblue", new Color (0x41, 0x69, 0xe1));
166 namedColors.put("saddlebrown", new Color (0x8b, 0x45, 0x13));
167 namedColors.put("salmon", new Color (0xfa, 0x80, 0x72));
168 namedColors.put("sandybrown", new Color (0xf4, 0xa4, 0x60));
169 namedColors.put("seagreen", new Color (0x2e, 0x8b, 0x57));
170 namedColors.put("seashell", new Color (0xff, 0xf5, 0xee));
171 namedColors.put("sienna", new Color (0xa0, 0x52, 0x2d));
172 namedColors.put("silver", new Color (0xc0, 0xc0, 0xc0));
173 namedColors.put("skyblue", new Color (0x87, 0xce, 0xeb));
174 namedColors.put("slateblue", new Color (0x6a, 0x5a, 0xcd));
175 namedColors.put("slategray", new Color (0x70, 0x80, 0x90));
176 namedColors.put("slategrey", new Color (0x70, 0x80, 0x90));
177 namedColors.put("snow", new Color (0xff, 0xfa, 0xfa));
178 namedColors.put("springgreen", new Color (0x00, 0xff, 0x7f));
179 namedColors.put("steelblue", new Color (0x46, 0x82, 0xb4));
180 namedColors.put("tan", new Color (0xd2, 0xb4, 0x8c));
181 namedColors.put("teal", new Color (0x00, 0x80, 0x80));
182 namedColors.put("thistle", new Color (0xd8, 0xbf, 0xd8));
183 namedColors.put("tomato", new Color (0xff, 0x63, 0x47));
184 namedColors.put("turquoise", new Color (0x40, 0xe0, 0xd0));
185 namedColors.put("violet", new Color (0xee, 0x82, 0xee));
186 namedColors.put("wheat", new Color (0xf5, 0xde, 0xb3));
187 namedColors.put("white", new Color (0xff, 0xff, 0xff));
188 namedColors.put("whitesmoke", new Color (0xf5, 0xf5, 0xf5));
189 namedColors.put("yellow", new Color (0xff, 0xff, 0x00));
190 namedColors.put("yellowgreen", new Color (0x9a, 0xcd, 0x32));
191 }
192
193
204 public static Color parseColor(String s) throws IllegalArgumentException {
205 int r, g, b;
206 if (s.startsWith("#")) {
207 if (s.length() == 4) {
208 r = Integer.parseInt(s.substring(1, 2) + s.charAt(1), 16);
209 g = Integer.parseInt(s.substring(2, 3) + s.charAt(2), 16);
210 b = Integer.parseInt(s.substring(3) + s.charAt(3), 16);
211 return new Color (r, g, b);
212 }
213 if (s.length() == 7) {
214 r = Integer.parseInt(s.substring(1, 3), 16);
215 g = Integer.parseInt(s.substring(3, 5), 16);
216 b = Integer.parseInt(s.substring(5), 16);
217 return new Color (r, g, b);
218 }
219 }
220 else {
221 Matcher m = RGB_PATTERN.matcher(s);
222 if (m.matches()) {
223 r = Integer.parseInt(m.group(1));
224 g = Integer.parseInt(m.group(2));
225 b = Integer.parseInt(m.group(3));
226 if ("%".equals(m.group(4))) {
227 r = 255 * (r / 100);
228 g = 255 * (g / 100);
229 b = 255 * (b / 100);
230 }
231 return new Color (r, g, b);
232 }
233 else {
234 Color color = (Color ) namedColors.get(s.toLowerCase());
235 if (color != null) {
236 return color;
237 }
238 }
239 }
240 throw new IllegalArgumentException ("Invalid color format.");
241 }
242
243
248 public static Color brightness(Color c, float scale) {
249 int r = c.getRed();
250 int g = c.getGreen();
251 int b = c.getBlue();
252 if (r == 0 && g == 0 && b == 0 && scale > 0) {
253 r = g = b = Math.min(255, (int) (255 * scale));
254 }
255 else {
256 r = Math.max(0, (int) (r * scale));
257 g = Math.max(0, (int) (g * scale));
258 b = Math.max(0, (int) (b * scale));
259 if (r > 255 || g > 255 || b > 255) {
260 return c;
261 }
262 }
263 return new Color (r, g, b);
264 }
265
266
271 public static Color saturation(Color c, float scale) {
272 int r = c.getRed();
273 int g = c.getGreen();
274 int b = c.getBlue();
275 float[] hsb = Color.RGBtoHSB(r, g, b, null);
276 float s = hsb[1] * scale;
277 if (s < 0) {
278 s = 0;
279 };
280 if (s > 1) {
281 s = 1;
282 };
283 return Color.getHSBColor(hsb[0], s, hsb[2]);
284 }
285
286 public static String toHex(Color color) {
287 String r = Integer.toHexString(color.getRed());
288 String g = Integer.toHexString(color.getGreen());
289 String b = Integer.toHexString(color.getBlue());
290 if (r.length() == 1) {
291 r = "0" + r;
292 }
293 if (g.length() == 1) {
294 g = "0" + g;
295 }
296 if (b.length() == 1) {
297 b = "0" + b;
298 }
299 return ("#" + r + g + b).toUpperCase();
300 }
301 }
302
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