mail-boxes-etc / lib / dompdf / src / Css / Color.php

Color.php in MBE eShip trunk, at lib/dompdf/src/Css/Color.php

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1	<?php
2
3	/**
4	* @package dompdf
5	* @link https://github.com/dompdf/dompdf
6	* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
7	*/
8	namespace Dompdf\Css;
9
10	use Dompdf\Helpers;
11
12	class Color
13	{
14	static $cssColorNames = [
15	"aliceblue" => "F0F8FF",
16	"antiquewhite" => "FAEBD7",
17	"aqua" => "00FFFF",
18	"aquamarine" => "7FFFD4",
19	"azure" => "F0FFFF",
20	"beige" => "F5F5DC",
21	"bisque" => "FFE4C4",
22	"black" => "000000",
23	"blanchedalmond" => "FFEBCD",
24	"blue" => "0000FF",
25	"blueviolet" => "8A2BE2",
26	"brown" => "A52A2A",
27	"burlywood" => "DEB887",
28	"cadetblue" => "5F9EA0",
29	"chartreuse" => "7FFF00",
30	"chocolate" => "D2691E",
31	"coral" => "FF7F50",
32	"cornflowerblue" => "6495ED",
33	"cornsilk" => "FFF8DC",
34	"crimson" => "DC143C",
35	"cyan" => "00FFFF",
36	"darkblue" => "00008B",
37	"darkcyan" => "008B8B",
38	"darkgoldenrod" => "B8860B",
39	"darkgray" => "A9A9A9",
40	"darkgreen" => "006400",
41	"darkgrey" => "A9A9A9",
42	"darkkhaki" => "BDB76B",
43	"darkmagenta" => "8B008B",
44	"darkolivegreen" => "556B2F",
45	"darkorange" => "FF8C00",
46	"darkorchid" => "9932CC",
47	"darkred" => "8B0000",
48	"darksalmon" => "E9967A",
49	"darkseagreen" => "8FBC8F",
50	"darkslateblue" => "483D8B",
51	"darkslategray" => "2F4F4F",
52	"darkslategrey" => "2F4F4F",
53	"darkturquoise" => "00CED1",
54	"darkviolet" => "9400D3",
55	"deeppink" => "FF1493",
56	"deepskyblue" => "00BFFF",
57	"dimgray" => "696969",
58	"dimgrey" => "696969",
59	"dodgerblue" => "1E90FF",
60	"firebrick" => "B22222",
61	"floralwhite" => "FFFAF0",
62	"forestgreen" => "228B22",
63	"fuchsia" => "FF00FF",
64	"gainsboro" => "DCDCDC",
65	"ghostwhite" => "F8F8FF",
66	"gold" => "FFD700",
67	"goldenrod" => "DAA520",
68	"gray" => "808080",
69	"green" => "008000",
70	"greenyellow" => "ADFF2F",
71	"grey" => "808080",
72	"honeydew" => "F0FFF0",
73	"hotpink" => "FF69B4",
74	"indianred" => "CD5C5C",
75	"indigo" => "4B0082",
76	"ivory" => "FFFFF0",
77	"khaki" => "F0E68C",
78	"lavender" => "E6E6FA",
79	"lavenderblush" => "FFF0F5",
80	"lawngreen" => "7CFC00",
81	"lemonchiffon" => "FFFACD",
82	"lightblue" => "ADD8E6",
83	"lightcoral" => "F08080",
84	"lightcyan" => "E0FFFF",
85	"lightgoldenrodyellow" => "FAFAD2",
86	"lightgray" => "D3D3D3",
87	"lightgreen" => "90EE90",
88	"lightgrey" => "D3D3D3",
89	"lightpink" => "FFB6C1",
90	"lightsalmon" => "FFA07A",
91	"lightseagreen" => "20B2AA",
92	"lightskyblue" => "87CEFA",
93	"lightslategray" => "778899",
94	"lightslategrey" => "778899",
95	"lightsteelblue" => "B0C4DE",
96	"lightyellow" => "FFFFE0",
97	"lime" => "00FF00",
98	"limegreen" => "32CD32",
99	"linen" => "FAF0E6",
100	"magenta" => "FF00FF",
101	"maroon" => "800000",
102	"mediumaquamarine" => "66CDAA",
103	"mediumblue" => "0000CD",
104	"mediumorchid" => "BA55D3",
105	"mediumpurple" => "9370DB",
106	"mediumseagreen" => "3CB371",
107	"mediumslateblue" => "7B68EE",
108	"mediumspringgreen" => "00FA9A",
109	"mediumturquoise" => "48D1CC",
110	"mediumvioletred" => "C71585",
111	"midnightblue" => "191970",
112	"mintcream" => "F5FFFA",
113	"mistyrose" => "FFE4E1",
114	"moccasin" => "FFE4B5",
115	"navajowhite" => "FFDEAD",
116	"navy" => "000080",
117	"oldlace" => "FDF5E6",
118	"olive" => "808000",
119	"olivedrab" => "6B8E23",
120	"orange" => "FFA500",
121	"orangered" => "FF4500",
122	"orchid" => "DA70D6",
123	"palegoldenrod" => "EEE8AA",
124	"palegreen" => "98FB98",
125	"paleturquoise" => "AFEEEE",
126	"palevioletred" => "DB7093",
127	"papayawhip" => "FFEFD5",
128	"peachpuff" => "FFDAB9",
129	"peru" => "CD853F",
130	"pink" => "FFC0CB",
131	"plum" => "DDA0DD",
132	"powderblue" => "B0E0E6",
133	"purple" => "800080",
134	"red" => "FF0000",
135	"rosybrown" => "BC8F8F",
136	"royalblue" => "4169E1",
137	"saddlebrown" => "8B4513",
138	"salmon" => "FA8072",
139	"sandybrown" => "F4A460",
140	"seagreen" => "2E8B57",
141	"seashell" => "FFF5EE",
142	"sienna" => "A0522D",
143	"silver" => "C0C0C0",
144	"skyblue" => "87CEEB",
145	"slateblue" => "6A5ACD",
146	"slategray" => "708090",
147	"slategrey" => "708090",
148	"snow" => "FFFAFA",
149	"springgreen" => "00FF7F",
150	"steelblue" => "4682B4",
151	"tan" => "D2B48C",
152	"teal" => "008080",
153	"thistle" => "D8BFD8",
154	"tomato" => "FF6347",
155	"turquoise" => "40E0D0",
156	"violet" => "EE82EE",
157	"wheat" => "F5DEB3",
158	"white" => "FFFFFF",
159	"whitesmoke" => "F5F5F5",
160	"yellow" => "FFFF00",
161	"yellowgreen" => "9ACD32",
162	];
163
164	/**
165	* @param array\|string\|null $color
166	* @return array\|string\|null
167	*/
168	static function parse($color)
169	{
170	if ($color === null) {
171	return null;
172	}
173
174	if (is_array($color)) {
175	// Assume the array has the right format...
176	// FIXME: should/could verify this.
177	return $color;
178	}
179
180	static $cache = [];
181
182	$color = strtolower($color);
183
184	if (isset($cache[$color])) {
185	return $cache[$color];
186	}
187
188	if ($color === "transparent") {
189	return $cache[$color] = $color;
190	}
191
192	if (isset(self::$cssColorNames[$color])) {
193	return $cache[$color] = self::getArray(self::$cssColorNames[$color]);
194	}
195
196	// https://www.w3.org/TR/css-color-4/#hex-notation
197	if (mb_substr($color, 0, 1) === "#") {
198	$length = mb_strlen($color);
199	$alpha = 1.0;
200
201	// #rgb format
202	if ($length === 4) {
203	return $cache[$color] = self::getArray($color[1] . $color[1] . $color[2] . $color[2] . $color[3] . $color[3]);
204	}
205
206	// #rgba format
207	if ($length === 5) {
208	if (ctype_xdigit($color[4])) {
209	$alpha = round(hexdec($color[4] . $color[4])/255, 2);
210	}
211	return $cache[$color] = self::getArray($color[1] . $color[1] . $color[2] . $color[2] . $color[3] . $color[3], $alpha);
212	}
213
214	// #rrggbb format
215	if ($length === 7) {
216	return $cache[$color] = self::getArray(mb_substr($color, 1, 6));
217	}
218
219	// #rrggbbaa format
220	if ($length === 9) {
221	if (ctype_xdigit(mb_substr($color, 7, 2))) {
222	$alpha = round(hexdec(mb_substr($color, 7, 2))/255, 2);
223	}
224	return $cache[$color] = self::getArray(mb_substr($color, 1, 6), $alpha);
225	}
226
227	return null;
228	}
229
230	// rgb( r g b [/α] ) / rgb( r,g,b[,α] ) format and alias rgba()
231	// https://www.w3.org/TR/css-color-4/#rgb-functions
232	if (mb_substr($color, 0, 4) === "rgb(" \|\| mb_substr($color, 0, 5) === "rgba(") {
233	$i = mb_strpos($color, "(");
234	$j = mb_strpos($color, ")");
235
236	// Bad color value
237	if ($i === false \|\| $j === false) {
238	return null;
239	}
240
241	$value_decl = trim(mb_substr($color, $i + 1, $j - $i - 1));
242
243	if (mb_strpos($value_decl, ",") === false) {
244	// Space-separated values syntax `r g b` or `r g b / α`
245	$parts = preg_split("/\s\/\s/", $value_decl);
246	$triplet = preg_split("/\s+/", $parts[0]);
247	$alpha = $parts[1] ?? 1.0;
248	} else {
249	// Comma-separated values syntax `r, g, b` or `r, g, b, α`
250	$parts = preg_split("/\s,\s/", $value_decl);
251	$triplet = array_slice($parts, 0, 3);
252	$alpha = $parts[3] ?? 1.0;
253	}
254
255	if (count($triplet) !== 3) {
256	return null;
257	}
258
259	// Parse alpha value
260	if (Helpers::is_percent($alpha)) {
261	$alpha = (float) $alpha / 100;
262	} else {
263	$alpha = (float) $alpha;
264	}
265
266	$alpha = max(0.0, min($alpha, 1.0));
267
268	foreach ($triplet as &$c) {
269	if (Helpers::is_percent($c)) {
270	$c = round((float) $c * 2.55);
271	}
272	}
273
274	return $cache[$color] = self::getArray(vsprintf("%02X%02X%02X", $triplet), $alpha);
275	}
276
277	// cmyk( c,m,y,k ) format
278	// http://www.w3.org/TR/css3-gcpm/#cmyk-colors
279	if (mb_substr($color, 0, 5) === "cmyk(") {
280	$i = mb_strpos($color, "(");
281	$j = mb_strpos($color, ")");
282
283	// Bad color value
284	if ($i === false \|\| $j === false) {
285	return null;
286	}
287
288	$values = explode(",", mb_substr($color, $i + 1, $j - $i - 1));
289
290	if (count($values) != 4) {
291	return null;
292	}
293
294	$values = array_map(function ($c) {
295	return min(1.0, max(0.0, floatval(trim($c))));
296	}, $values);
297
298	return $cache[$color] = self::getArray($values);
299	}
300
301	// Invalid or unsupported color format
302	return null;
303	}
304
305	/**
306	* @param array\|string $color
307	* @param float $alpha
308	* @return array
309	*/
310	static function getArray($color, $alpha = 1.0)
311	{
312	$c = [null, null, null, null, "alpha" => $alpha, "hex" => null];
313
314	if (is_array($color)) {
315	$c = $color;
316	$c["c"] = $c[0];
317	$c["m"] = $c[1];
318	$c["y"] = $c[2];
319	$c["k"] = $c[3];
320	$c["alpha"] = $alpha;
321	$c["hex"] = "cmyk($c[0],$c[1],$c[2],$c[3])";
322	} else {
323	if (ctype_xdigit($color) === false \|\| mb_strlen($color) !== 6) {
324	// invalid color value ... expected 6-character hex
325	return $c;
326	}
327	$c[0] = hexdec(mb_substr($color, 0, 2)) / 0xff;
328	$c[1] = hexdec(mb_substr($color, 2, 2)) / 0xff;
329	$c[2] = hexdec(mb_substr($color, 4, 2)) / 0xff;
330	$c["r"] = $c[0];
331	$c["g"] = $c[1];
332	$c["b"] = $c[2];
333	$c["alpha"] = $alpha;
334	$c["hex"] = sprintf("#%s%02X", $color, round($alpha * 255));
335	}
336
337	return $c;
338	}
339	}
340