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<?php
/**
* SCSSPHP
*
* @copyright 2012-2020 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://scssphp.github.io/scssphp
*/
namespace ScssPhp\ScssPhp;
/**
* CSS Colors
*
* @author Leaf Corcoran <leafot@gmail.com>
*
* @internal
*/
class Colors
{
/**
* CSS Colors
*
* @see http://www.w3.org/TR/css3-color
*
* @var array<string, string>
*/
protected static $cssColors = [
'aliceblue' => '240,248,255',
'antiquewhite' => '250,235,215',
'aqua' => '0,255,255',
'cyan' => '0,255,255',
'aquamarine' => '127,255,212',
'azure' => '240,255,255',
'beige' => '245,245,220',
'bisque' => '255,228,196',
'black' => '0,0,0',
'blanchedalmond' => '255,235,205',
'blue' => '0,0,255',
'blueviolet' => '138,43,226',
'brown' => '165,42,42',
'burlywood' => '222,184,135',
'cadetblue' => '95,158,160',
'chartreuse' => '127,255,0',
'chocolate' => '210,105,30',
'coral' => '255,127,80',
'cornflowerblue' => '100,149,237',
'cornsilk' => '255,248,220',
'crimson' => '220,20,60',
'darkblue' => '0,0,139',
'darkcyan' => '0,139,139',
'darkgoldenrod' => '184,134,11',
'darkgray' => '169,169,169',
'darkgrey' => '169,169,169',
'darkgreen' => '0,100,0',
'darkkhaki' => '189,183,107',
'darkmagenta' => '139,0,139',
'darkolivegreen' => '85,107,47',
'darkorange' => '255,140,0',
'darkorchid' => '153,50,204',
'darkred' => '139,0,0',
'darksalmon' => '233,150,122',
'darkseagreen' => '143,188,143',
'darkslateblue' => '72,61,139',
'darkslategray' => '47,79,79',
'darkslategrey' => '47,79,79',
'darkturquoise' => '0,206,209',
'darkviolet' => '148,0,211',
'deeppink' => '255,20,147',
'deepskyblue' => '0,191,255',
'dimgray' => '105,105,105',
'dimgrey' => '105,105,105',
'dodgerblue' => '30,144,255',
'firebrick' => '178,34,34',
'floralwhite' => '255,250,240',
'forestgreen' => '34,139,34',
'fuchsia' => '255,0,255',
'magenta' => '255,0,255',
'gainsboro' => '220,220,220',
'ghostwhite' => '248,248,255',
'gold' => '255,215,0',
'goldenrod' => '218,165,32',
'gray' => '128,128,128',
'grey' => '128,128,128',
'green' => '0,128,0',
'greenyellow' => '173,255,47',
'honeydew' => '240,255,240',
'hotpink' => '255,105,180',
'indianred' => '205,92,92',
'indigo' => '75,0,130',
'ivory' => '255,255,240',
'khaki' => '240,230,140',
'lavender' => '230,230,250',
'lavenderblush' => '255,240,245',
'lawngreen' => '124,252,0',
'lemonchiffon' => '255,250,205',
'lightblue' => '173,216,230',
'lightcoral' => '240,128,128',
'lightcyan' => '224,255,255',
'lightgoldenrodyellow' => '250,250,210',
'lightgray' => '211,211,211',
'lightgrey' => '211,211,211',
'lightgreen' => '144,238,144',
'lightpink' => '255,182,193',
'lightsalmon' => '255,160,122',
'lightseagreen' => '32,178,170',
'lightskyblue' => '135,206,250',
'lightslategray' => '119,136,153',
'lightslategrey' => '119,136,153',
'lightsteelblue' => '176,196,222',
'lightyellow' => '255,255,224',
'lime' => '0,255,0',
'limegreen' => '50,205,50',
'linen' => '250,240,230',
'maroon' => '128,0,0',
'mediumaquamarine' => '102,205,170',
'mediumblue' => '0,0,205',
'mediumorchid' => '186,85,211',
'mediumpurple' => '147,112,219',
'mediumseagreen' => '60,179,113',
'mediumslateblue' => '123,104,238',
'mediumspringgreen' => '0,250,154',
'mediumturquoise' => '72,209,204',
'mediumvioletred' => '199,21,133',
'midnightblue' => '25,25,112',
'mintcream' => '245,255,250',
'mistyrose' => '255,228,225',
'moccasin' => '255,228,181',
'navajowhite' => '255,222,173',
'navy' => '0,0,128',
'oldlace' => '253,245,230',
'olive' => '128,128,0',
'olivedrab' => '107,142,35',
'orange' => '255,165,0',
'orangered' => '255,69,0',
'orchid' => '218,112,214',
'palegoldenrod' => '238,232,170',
'palegreen' => '152,251,152',
'paleturquoise' => '175,238,238',
'palevioletred' => '219,112,147',
'papayawhip' => '255,239,213',
'peachpuff' => '255,218,185',
'peru' => '205,133,63',
'pink' => '255,192,203',
'plum' => '221,160,221',
'powderblue' => '176,224,230',
'purple' => '128,0,128',
'red' => '255,0,0',
'rosybrown' => '188,143,143',
'royalblue' => '65,105,225',
'saddlebrown' => '139,69,19',
'salmon' => '250,128,114',
'sandybrown' => '244,164,96',
'seagreen' => '46,139,87',
'seashell' => '255,245,238',
'sienna' => '160,82,45',
'silver' => '192,192,192',
'skyblue' => '135,206,235',
'slateblue' => '106,90,205',
'slategray' => '112,128,144',
'slategrey' => '112,128,144',
'snow' => '255,250,250',
'springgreen' => '0,255,127',
'steelblue' => '70,130,180',
'tan' => '210,180,140',
'teal' => '0,128,128',
'thistle' => '216,191,216',
'tomato' => '255,99,71',
'turquoise' => '64,224,208',
'violet' => '238,130,238',
'wheat' => '245,222,179',
'white' => '255,255,255',
'whitesmoke' => '245,245,245',
'yellow' => '255,255,0',
'yellowgreen' => '154,205,50',
'rebeccapurple' => '102,51,153',
'transparent' => '0,0,0,0',
];
/**
* Convert named color in a [r,g,b[,a]] array
*
* @param string $colorName
*
* @return int[]|null
*/
public static function colorNameToRGBa($colorName)
{
if (\is_string($colorName) && isset(static::$cssColors[$colorName])) {
$rgba = explode(',', static::$cssColors[$colorName]);
// only case with opacity is transparent, with opacity=0, so we can intval on opacity also
$rgba = array_map('intval', $rgba);
return $rgba;
}
return null;
}
/**
* Reverse conversion : from RGBA to a color name if possible
*
* @param int $r
* @param int $g
* @param int $b
* @param int|float $a
*
* @return string|null
*/
public static function RGBaToColorName($r, $g, $b, $a = 1)
{
static $reverseColorTable = null;
if (! is_numeric($r) || ! is_numeric($g) || ! is_numeric($b) || ! is_numeric($a)) {
return null;
}
if ($a < 1) {
return null;
}
if (\is_null($reverseColorTable)) {
$reverseColorTable = [];
foreach (static::$cssColors as $name => $rgb_str) {
$rgb_str = explode(',', $rgb_str);
if (
\count($rgb_str) == 3 &&
! isset($reverseColorTable[\intval($rgb_str[0])][\intval($rgb_str[1])][\intval($rgb_str[2])])
) {
$reverseColorTable[\intval($rgb_str[0])][\intval($rgb_str[1])][\intval($rgb_str[2])] = $name;
}
}
}
if (isset($reverseColorTable[\intval($r)][\intval($g)][\intval($b)])) {
return $reverseColorTable[\intval($r)][\intval($g)][\intval($b)];
}
return null;
}
}