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File: Color.php
<?php /** * @package dompdf * @link https://github.com/dompdf/dompdf * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License */ namespace Dompdf\Css; use Dompdf\Helpers; class Color { static $cssColorNames = [ "aliceblue" => "F0F8FF", "antiquewhite" => "FAEBD7", "aqua" => "00FFFF", "aquamarine" => "7FFFD4", "azure" => "F0FFFF", "beige" => "F5F5DC", "bisque" => "FFE4C4", "black" => "000000", "blanchedalmond" => "FFEBCD", "blue" => "0000FF", "blueviolet" => "8A2BE2", "brown" => "A52A2A", "burlywood" => "DEB887", "cadetblue" => "5F9EA0", "chartreuse" => "7FFF00", "chocolate" => "D2691E", "coral" => "FF7F50", "cornflowerblue" => "6495ED", "cornsilk" => "FFF8DC", "crimson" => "DC143C", "cyan" => "00FFFF", "darkblue" => "00008B", "darkcyan" => "008B8B", "darkgoldenrod" => "B8860B", "darkgray" => "A9A9A9", "darkgreen" => "006400", "darkgrey" => "A9A9A9", "darkkhaki" => "BDB76B", "darkmagenta" => "8B008B", "darkolivegreen" => "556B2F", "darkorange" => "FF8C00", "darkorchid" => "9932CC", "darkred" => "8B0000", "darksalmon" => "E9967A", "darkseagreen" => "8FBC8F", "darkslateblue" => "483D8B", "darkslategray" => "2F4F4F", "darkslategrey" => "2F4F4F", "darkturquoise" => "00CED1", "darkviolet" => "9400D3", "deeppink" => "FF1493", "deepskyblue" => "00BFFF", "dimgray" => "696969", "dimgrey" => "696969", "dodgerblue" => "1E90FF", "firebrick" => "B22222", "floralwhite" => "FFFAF0", "forestgreen" => "228B22", "fuchsia" => "FF00FF", "gainsboro" => "DCDCDC", "ghostwhite" => "F8F8FF", "gold" => "FFD700", "goldenrod" => "DAA520", "gray" => "808080", "green" => "008000", "greenyellow" => "ADFF2F", "grey" => "808080", "honeydew" => "F0FFF0", "hotpink" => "FF69B4", "indianred" => "CD5C5C", "indigo" => "4B0082", "ivory" => "FFFFF0", "khaki" => "F0E68C", "lavender" => "E6E6FA", "lavenderblush" => "FFF0F5", "lawngreen" => "7CFC00", "lemonchiffon" => "FFFACD", "lightblue" => "ADD8E6", "lightcoral" => "F08080", "lightcyan" => "E0FFFF", "lightgoldenrodyellow" => "FAFAD2", "lightgray" => "D3D3D3", "lightgreen" => "90EE90", "lightgrey" => "D3D3D3", "lightpink" => "FFB6C1", "lightsalmon" => "FFA07A", "lightseagreen" => "20B2AA", "lightskyblue" => "87CEFA", "lightslategray" => "778899", "lightslategrey" => "778899", "lightsteelblue" => "B0C4DE", "lightyellow" => "FFFFE0", "lime" => "00FF00", "limegreen" => "32CD32", "linen" => "FAF0E6", "magenta" => "FF00FF", "maroon" => "800000", "mediumaquamarine" => "66CDAA", "mediumblue" => "0000CD", "mediumorchid" => "BA55D3", "mediumpurple" => "9370DB", "mediumseagreen" => "3CB371", "mediumslateblue" => "7B68EE", "mediumspringgreen" => "00FA9A", "mediumturquoise" => "48D1CC", "mediumvioletred" => "C71585", "midnightblue" => "191970", "mintcream" => "F5FFFA", "mistyrose" => "FFE4E1", "moccasin" => "FFE4B5", "navajowhite" => "FFDEAD", "navy" => "000080", "oldlace" => "FDF5E6", "olive" => "808000", "olivedrab" => "6B8E23", "orange" => "FFA500", "orangered" => "FF4500", "orchid" => "DA70D6", "palegoldenrod" => "EEE8AA", "palegreen" => "98FB98", "paleturquoise" => "AFEEEE", "palevioletred" => "DB7093", "papayawhip" => "FFEFD5", "peachpuff" => "FFDAB9", "peru" => "CD853F", "pink" => "FFC0CB", "plum" => "DDA0DD", "powderblue" => "B0E0E6", "purple" => "800080", "red" => "FF0000", "rosybrown" => "BC8F8F", "royalblue" => "4169E1", "saddlebrown" => "8B4513", "salmon" => "FA8072", "sandybrown" => "F4A460", "seagreen" => "2E8B57", "seashell" => "FFF5EE", "sienna" => "A0522D", "silver" => "C0C0C0", "skyblue" => "87CEEB", "slateblue" => "6A5ACD", "slategray" => "708090", "slategrey" => "708090", "snow" => "FFFAFA", "springgreen" => "00FF7F", "steelblue" => "4682B4", "tan" => "D2B48C", "teal" => "008080", "thistle" => "D8BFD8", "tomato" => "FF6347", "turquoise" => "40E0D0", "violet" => "EE82EE", "wheat" => "F5DEB3", "white" => "FFFFFF", "whitesmoke" => "F5F5F5", "yellow" => "FFFF00", "yellowgreen" => "9ACD32", ]; /** * @param array|string|null $color * @return array|string|null */ static function parse($color) { if ($color === null) { return null; } if (is_array($color)) { // Assume the array has the right format... // FIXME: should/could verify this. return $color; } static $cache = []; $color = strtolower($color); if (isset($cache[$color])) { return $cache[$color]; } if ($color === "transparent") { return $cache[$color] = $color; } if (isset(self::$cssColorNames[$color])) { return $cache[$color] = self::getArray(self::$cssColorNames[$color]); } // https://www.w3.org/TR/css-color-4/#hex-notation if (mb_substr($color, 0, 1) === "#") { $length = mb_strlen($color); $alpha = 1.0; // #rgb format if ($length === 4) { return $cache[$color] = self::getArray($color[1] . $color[1] . $color[2] . $color[2] . $color[3] . $color[3]); } // #rgba format if ($length === 5) { if (ctype_xdigit($color[4])) { $alpha = round(hexdec($color[4] . $color[4])/255, 2); } return $cache[$color] = self::getArray($color[1] . $color[1] . $color[2] . $color[2] . $color[3] . $color[3], $alpha); } // #rrggbb format if ($length === 7) { return $cache[$color] = self::getArray(mb_substr($color, 1, 6)); } // #rrggbbaa format if ($length === 9) { if (ctype_xdigit(mb_substr($color, 7, 2))) { $alpha = round(hexdec(mb_substr($color, 7, 2))/255, 2); } return $cache[$color] = self::getArray(mb_substr($color, 1, 6), $alpha); } return null; } // rgb( r g b [/α] ) / rgb( r,g,b[,α] ) format and alias rgba() // https://www.w3.org/TR/css-color-4/#rgb-functions if (mb_substr($color, 0, 4) === "rgb(" || mb_substr($color, 0, 5) === "rgba(") { $i = mb_strpos($color, "("); $j = mb_strpos($color, ")"); // Bad color value if ($i === false || $j === false) { return null; } $value_decl = trim(mb_substr($color, $i + 1, $j - $i - 1)); if (mb_strpos($value_decl, ",") === false) { // Space-separated values syntax `r g b` or `r g b / α` $parts = preg_split("/\s*\/\s*/", $value_decl); $triplet = preg_split("/\s+/", $parts[0]); $alpha = $parts[1] ?? 1.0; } else { // Comma-separated values syntax `r, g, b` or `r, g, b, α` $parts = preg_split("/\s*,\s*/", $value_decl); $triplet = array_slice($parts, 0, 3); $alpha = $parts[3] ?? 1.0; } if (count($triplet) !== 3) { return null; } // Parse alpha value if (Helpers::is_percent($alpha)) { $alpha = (float) $alpha / 100; } else { $alpha = (float) $alpha; } $alpha = max(0.0, min($alpha, 1.0)); foreach ($triplet as &$c) { if (Helpers::is_percent($c)) { $c = round((float) $c * 2.55); } } return $cache[$color] = self::getArray(vsprintf("%02X%02X%02X", $triplet), $alpha); } // cmyk( c,m,y,k ) format // http://www.w3.org/TR/css3-gcpm/#cmyk-colors if (mb_substr($color, 0, 5) === "cmyk(") { $i = mb_strpos($color, "("); $j = mb_strpos($color, ")"); // Bad color value if ($i === false || $j === false) { return null; } $values = explode(",", mb_substr($color, $i + 1, $j - $i - 1)); if (count($values) != 4) { return null; } $values = array_map(function ($c) { return min(1.0, max(0.0, floatval(trim($c)))); }, $values); return $cache[$color] = self::getArray($values); } // Invalid or unsupported color format return null; } /** * @param array|string $color * @param float $alpha * @return array */ static function getArray($color, $alpha = 1.0) { $c = [null, null, null, null, "alpha" => $alpha, "hex" => null]; if (is_array($color)) { $c = $color; $c["c"] = $c[0]; $c["m"] = $c[1]; $c["y"] = $c[2]; $c["k"] = $c[3]; $c["alpha"] = $alpha; $c["hex"] = "cmyk($c[0],$c[1],$c[2],$c[3])"; } else { if (ctype_xdigit($color) === false || mb_strlen($color) !== 6) { // invalid color value ... expected 6-character hex return $c; } $c[0] = hexdec(mb_substr($color, 0, 2)) / 0xff; $c[1] = hexdec(mb_substr($color, 2, 2)) / 0xff; $c[2] = hexdec(mb_substr($color, 4, 2)) / 0xff; $c["r"] = $c[0]; $c["g"] = $c[1]; $c["b"] = $c[2]; $c["alpha"] = $alpha; $c["hex"] = sprintf("#%s%02X", $color, round($alpha * 255)); } return $c; } }
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