lib/scssphp/Colors.php

   1 <?php
   2
   3 /**
   4  * SCSSPHP
   5  *
   6  * @copyright 2012-2020 Leaf Corcoran
   7  *
   8  * @license http://opensource.org/licenses/MIT MIT
   9  *
  10  * @link http://scssphp.github.io/scssphp
  11  */
  12
  13 namespace ScssPhp\ScssPhp;
  14
  15 /**
  16  * CSS Colors
  17  *
  18  * @author Leaf Corcoran <leafot@gmail.com>
  19  *
  20  * @internal
  21  */
  22 class Colors
  23 {
  24     /**
  25      * CSS Colors
  26      *
  27      * @see http://www.w3.org/TR/css3-color
  28      *
  29      * @var array<string, string>
  30      */
  31     protected static $cssColors = [
  32         'aliceblue' => '240,248,255',
  33         'antiquewhite' => '250,235,215',
  34         'aqua' => '0,255,255',
  35         'cyan' => '0,255,255',
  36         'aquamarine' => '127,255,212',
  37         'azure' => '240,255,255',
  38         'beige' => '245,245,220',
  39         'bisque' => '255,228,196',
  40         'black' => '0,0,0',
  41         'blanchedalmond' => '255,235,205',
  42         'blue' => '0,0,255',
  43         'blueviolet' => '138,43,226',
  44         'brown' => '165,42,42',
  45         'burlywood' => '222,184,135',
  46         'cadetblue' => '95,158,160',
  47         'chartreuse' => '127,255,0',
  48         'chocolate' => '210,105,30',
  49         'coral' => '255,127,80',
  50         'cornflowerblue' => '100,149,237',
  51         'cornsilk' => '255,248,220',
  52         'crimson' => '220,20,60',
  53         'darkblue' => '0,0,139',
  54         'darkcyan' => '0,139,139',
  55         'darkgoldenrod' => '184,134,11',
  56         'darkgray' => '169,169,169',
  57         'darkgrey' => '169,169,169',
  58         'darkgreen' => '0,100,0',
  59         'darkkhaki' => '189,183,107',
  60         'darkmagenta' => '139,0,139',
  61         'darkolivegreen' => '85,107,47',
  62         'darkorange' => '255,140,0',
  63         'darkorchid' => '153,50,204',
  64         'darkred' => '139,0,0',
  65         'darksalmon' => '233,150,122',
  66         'darkseagreen' => '143,188,143',
  67         'darkslateblue' => '72,61,139',
  68         'darkslategray' => '47,79,79',
  69         'darkslategrey' => '47,79,79',
  70         'darkturquoise' => '0,206,209',
  71         'darkviolet' => '148,0,211',
  72         'deeppink' => '255,20,147',
  73         'deepskyblue' => '0,191,255',
  74         'dimgray' => '105,105,105',
  75         'dimgrey' => '105,105,105',
  76         'dodgerblue' => '30,144,255',
  77         'firebrick' => '178,34,34',
  78         'floralwhite' => '255,250,240',
  79         'forestgreen' => '34,139,34',
  80         'fuchsia' => '255,0,255',
  81         'magenta' => '255,0,255',
  82         'gainsboro' => '220,220,220',
  83         'ghostwhite' => '248,248,255',
  84         'gold' => '255,215,0',
  85         'goldenrod' => '218,165,32',
  86         'gray' => '128,128,128',
  87         'grey' => '128,128,128',
  88         'green' => '0,128,0',
  89         'greenyellow' => '173,255,47',
  90         'honeydew' => '240,255,240',
  91         'hotpink' => '255,105,180',
  92         'indianred' => '205,92,92',
  93         'indigo' => '75,0,130',
  94         'ivory' => '255,255,240',
  95         'khaki' => '240,230,140',
  96         'lavender' => '230,230,250',
  97         'lavenderblush' => '255,240,245',
  98         'lawngreen' => '124,252,0',
  99         'lemonchiffon' => '255,250,205',
 100         'lightblue' => '173,216,230',
 101         'lightcoral' => '240,128,128',
 102         'lightcyan' => '224,255,255',
 103         'lightgoldenrodyellow' => '250,250,210',
 104         'lightgray' => '211,211,211',
 105         'lightgrey' => '211,211,211',
 106         'lightgreen' => '144,238,144',
 107         'lightpink' => '255,182,193',
 108         'lightsalmon' => '255,160,122',
 109         'lightseagreen' => '32,178,170',
 110         'lightskyblue' => '135,206,250',
 111         'lightslategray' => '119,136,153',
 112         'lightslategrey' => '119,136,153',
 113         'lightsteelblue' => '176,196,222',
 114         'lightyellow' => '255,255,224',
 115         'lime' => '0,255,0',
 116         'limegreen' => '50,205,50',
 117         'linen' => '250,240,230',
 118         'maroon' => '128,0,0',
 119         'mediumaquamarine' => '102,205,170',
 120         'mediumblue' => '0,0,205',
 121         'mediumorchid' => '186,85,211',
 122         'mediumpurple' => '147,112,219',
 123         'mediumseagreen' => '60,179,113',
 124         'mediumslateblue' => '123,104,238',
 125         'mediumspringgreen' => '0,250,154',
 126         'mediumturquoise' => '72,209,204',
 127         'mediumvioletred' => '199,21,133',
 128         'midnightblue' => '25,25,112',
 129         'mintcream' => '245,255,250',
 130         'mistyrose' => '255,228,225',
 131         'moccasin' => '255,228,181',
 132         'navajowhite' => '255,222,173',
 133         'navy' => '0,0,128',
 134         'oldlace' => '253,245,230',
 135         'olive' => '128,128,0',
 136         'olivedrab' => '107,142,35',
 137         'orange' => '255,165,0',
 138         'orangered' => '255,69,0',
 139         'orchid' => '218,112,214',
 140         'palegoldenrod' => '238,232,170',
 141         'palegreen' => '152,251,152',
 142         'paleturquoise' => '175,238,238',
 143         'palevioletred' => '219,112,147',
 144         'papayawhip' => '255,239,213',
 145         'peachpuff' => '255,218,185',
 146         'peru' => '205,133,63',
 147         'pink' => '255,192,203',
 148         'plum' => '221,160,221',
 149         'powderblue' => '176,224,230',
 150         'purple' => '128,0,128',
 151         'red' => '255,0,0',
 152         'rosybrown' => '188,143,143',
 153         'royalblue' => '65,105,225',
 154         'saddlebrown' => '139,69,19',
 155         'salmon' => '250,128,114',
 156         'sandybrown' => '244,164,96',
 157         'seagreen' => '46,139,87',
 158         'seashell' => '255,245,238',
 159         'sienna' => '160,82,45',
 160         'silver' => '192,192,192',
 161         'skyblue' => '135,206,235',
 162         'slateblue' => '106,90,205',
 163         'slategray' => '112,128,144',
 164         'slategrey' => '112,128,144',
 165         'snow' => '255,250,250',
 166         'springgreen' => '0,255,127',
 167         'steelblue' => '70,130,180',
 168         'tan' => '210,180,140',
 169         'teal' => '0,128,128',
 170         'thistle' => '216,191,216',
 171         'tomato' => '255,99,71',
 172         'turquoise' => '64,224,208',
 173         'violet' => '238,130,238',
 174         'wheat' => '245,222,179',
 175         'white' => '255,255,255',
 176         'whitesmoke' => '245,245,245',
 177         'yellow' => '255,255,0',
 178         'yellowgreen' => '154,205,50',
 179         'rebeccapurple' => '102,51,153',
 180         'transparent' => '0,0,0,0',
 181     ];
 182
 183     /**
 184      * Convert named color in a [r,g,b[,a]] array
 185      *
 186      * @param string $colorName
 187      *
 188      * @return int[]|null
 189      */
 190     public static function colorNameToRGBa($colorName)
 191     {
 192         if (\is_string($colorName) && isset(static::$cssColors[$colorName])) {
 193             $rgba = explode(',', static::$cssColors[$colorName]);
 194
 195             // only case with opacity is transparent, with opacity=0, so we can intval on opacity also
 196             $rgba = array_map('intval', $rgba);
 197
 198             return $rgba;
 199         }
 200
 201         return null;
 202     }
 203
 204     /**
 205      * Reverse conversion : from RGBA to a color name if possible
 206      *
 207      * @param int       $r
 208      * @param int       $g
 209      * @param int       $b
 210      * @param int|float $a
 211      *
 212      * @return string|null
 213      */
 214     public static function RGBaToColorName($r, $g, $b, $a = 1)
 215     {
 216         static $reverseColorTable = null;
 217
 218         if (! is_numeric($r) || ! is_numeric($g) || ! is_numeric($b) || ! is_numeric($a)) {
 219             return null;
 220         }
 221
 222         if ($a < 1) {
 223             return null;
 224         }
 225
 226         if (\is_null($reverseColorTable)) {
 227             $reverseColorTable = [];
 228
 229             foreach (static::$cssColors as $name => $rgb_str) {
 230                 $rgb_str = explode(',', $rgb_str);
 231
 232                 if (
 233                     \count($rgb_str) == 3 &&
 234                     ! isset($reverseColorTable[\intval($rgb_str[0])][\intval($rgb_str[1])][\intval($rgb_str[2])])
 235                 ) {
 236                     $reverseColorTable[\intval($rgb_str[0])][\intval($rgb_str[1])][\intval($rgb_str[2])] = $name;
 237                 }
 238             }
 239         }
 240
 241         if (isset($reverseColorTable[\intval($r)][\intval($g)][\intval($b)])) {
 242             return $reverseColorTable[\intval($r)][\intval($g)][\intval($b)];
 243         }
 244
 245         return null;
 246     }
 247 }