lib/scssphp/Colors.php

   1 <?php
   2 /**
   3  * SCSSPHP
   4  *
   5  * @copyright 2012-2019 Leaf Corcoran
   6  *
   7  * @license http://opensource.org/licenses/MIT MIT
   8  *
   9  * @link http://scssphp.github.io/scssphp
  10  */
  11
  12 namespace ScssPhp\ScssPhp;
  13
  14 /**
  15  * CSS Colors
  16  *
  17  * @author Leaf Corcoran <leafot@gmail.com>
  18  */
  19 class Colors
  20 {
  21     /**
  22      * CSS Colors
  23      *
  24      * @see http://www.w3.org/TR/css3-color
  25      *
  26      * @var array
  27      */
  28     protected static $cssColors = [
  29         'aliceblue' => '240,248,255',
  30         'antiquewhite' => '250,235,215',
  31         'aqua' => '0,255,255',
  32         'aquamarine' => '127,255,212',
  33         'azure' => '240,255,255',
  34         'beige' => '245,245,220',
  35         'bisque' => '255,228,196',
  36         'black' => '0,0,0',
  37         'blanchedalmond' => '255,235,205',
  38         'blue' => '0,0,255',
  39         'blueviolet' => '138,43,226',
  40         'brown' => '165,42,42',
  41         'burlywood' => '222,184,135',
  42         'cadetblue' => '95,158,160',
  43         'chartreuse' => '127,255,0',
  44         'chocolate' => '210,105,30',
  45         'coral' => '255,127,80',
  46         'cornflowerblue' => '100,149,237',
  47         'cornsilk' => '255,248,220',
  48         'crimson' => '220,20,60',
  49         'cyan' => '0,255,255',
  50         'darkblue' => '0,0,139',
  51         'darkcyan' => '0,139,139',
  52         'darkgoldenrod' => '184,134,11',
  53         'darkgray' => '169,169,169',
  54         'darkgreen' => '0,100,0',
  55         'darkgrey' => '169,169,169',
  56         'darkkhaki' => '189,183,107',
  57         'darkmagenta' => '139,0,139',
  58         'darkolivegreen' => '85,107,47',
  59         'darkorange' => '255,140,0',
  60         'darkorchid' => '153,50,204',
  61         'darkred' => '139,0,0',
  62         'darksalmon' => '233,150,122',
  63         'darkseagreen' => '143,188,143',
  64         'darkslateblue' => '72,61,139',
  65         'darkslategray' => '47,79,79',
  66         'darkslategrey' => '47,79,79',
  67         'darkturquoise' => '0,206,209',
  68         'darkviolet' => '148,0,211',
  69         'deeppink' => '255,20,147',
  70         'deepskyblue' => '0,191,255',
  71         'dimgray' => '105,105,105',
  72         'dimgrey' => '105,105,105',
  73         'dodgerblue' => '30,144,255',
  74         'firebrick' => '178,34,34',
  75         'floralwhite' => '255,250,240',
  76         'forestgreen' => '34,139,34',
  77         'fuchsia' => '255,0,255',
  78         'gainsboro' => '220,220,220',
  79         'ghostwhite' => '248,248,255',
  80         'gold' => '255,215,0',
  81         'goldenrod' => '218,165,32',
  82         'gray' => '128,128,128',
  83         'green' => '0,128,0',
  84         'greenyellow' => '173,255,47',
  85         'grey' => '128,128,128',
  86         'honeydew' => '240,255,240',
  87         'hotpink' => '255,105,180',
  88         'indianred' => '205,92,92',
  89         'indigo' => '75,0,130',
  90         'ivory' => '255,255,240',
  91         'khaki' => '240,230,140',
  92         'lavender' => '230,230,250',
  93         'lavenderblush' => '255,240,245',
  94         'lawngreen' => '124,252,0',
  95         'lemonchiffon' => '255,250,205',
  96         'lightblue' => '173,216,230',
  97         'lightcoral' => '240,128,128',
  98         'lightcyan' => '224,255,255',
  99         'lightgoldenrodyellow' => '250,250,210',
 100         'lightgray' => '211,211,211',
 101         'lightgreen' => '144,238,144',
 102         'lightgrey' => '211,211,211',
 103         'lightpink' => '255,182,193',
 104         'lightsalmon' => '255,160,122',
 105         'lightseagreen' => '32,178,170',
 106         'lightskyblue' => '135,206,250',
 107         'lightslategray' => '119,136,153',
 108         'lightslategrey' => '119,136,153',
 109         'lightsteelblue' => '176,196,222',
 110         'lightyellow' => '255,255,224',
 111         'lime' => '0,255,0',
 112         'limegreen' => '50,205,50',
 113         'linen' => '250,240,230',
 114         'magenta' => '255,0,255',
 115         'maroon' => '128,0,0',
 116         'mediumaquamarine' => '102,205,170',
 117         'mediumblue' => '0,0,205',
 118         'mediumorchid' => '186,85,211',
 119         'mediumpurple' => '147,112,219',
 120         'mediumseagreen' => '60,179,113',
 121         'mediumslateblue' => '123,104,238',
 122         'mediumspringgreen' => '0,250,154',
 123         'mediumturquoise' => '72,209,204',
 124         'mediumvioletred' => '199,21,133',
 125         'midnightblue' => '25,25,112',
 126         'mintcream' => '245,255,250',
 127         'mistyrose' => '255,228,225',
 128         'moccasin' => '255,228,181',
 129         'navajowhite' => '255,222,173',
 130         'navy' => '0,0,128',
 131         'oldlace' => '253,245,230',
 132         'olive' => '128,128,0',
 133         'olivedrab' => '107,142,35',
 134         'orange' => '255,165,0',
 135         'orangered' => '255,69,0',
 136         'orchid' => '218,112,214',
 137         'palegoldenrod' => '238,232,170',
 138         'palegreen' => '152,251,152',
 139         'paleturquoise' => '175,238,238',
 140         'palevioletred' => '219,112,147',
 141         'papayawhip' => '255,239,213',
 142         'peachpuff' => '255,218,185',
 143         'peru' => '205,133,63',
 144         'pink' => '255,192,203',
 145         'plum' => '221,160,221',
 146         'powderblue' => '176,224,230',
 147         'purple' => '128,0,128',
 148         'rebeccapurple' => '102,51,153',
 149         'red' => '255,0,0',
 150         'rosybrown' => '188,143,143',
 151         'royalblue' => '65,105,225',
 152         'saddlebrown' => '139,69,19',
 153         'salmon' => '250,128,114',
 154         'sandybrown' => '244,164,96',
 155         'seagreen' => '46,139,87',
 156         'seashell' => '255,245,238',
 157         'sienna' => '160,82,45',
 158         'silver' => '192,192,192',
 159         'skyblue' => '135,206,235',
 160         'slateblue' => '106,90,205',
 161         'slategray' => '112,128,144',
 162         'slategrey' => '112,128,144',
 163         'snow' => '255,250,250',
 164         'springgreen' => '0,255,127',
 165         'steelblue' => '70,130,180',
 166         'tan' => '210,180,140',
 167         'teal' => '0,128,128',
 168         'thistle' => '216,191,216',
 169         'tomato' => '255,99,71',
 170         'transparent' => '0,0,0,0',
 171         'turquoise' => '64,224,208',
 172         'violet' => '238,130,238',
 173         'wheat' => '245,222,179',
 174         'white' => '255,255,255',
 175         'whitesmoke' => '245,245,245',
 176         'yellow' => '255,255,0',
 177         'yellowgreen' => '154,205,50',
 178     ];
 179
 180     /**
 181      * Convert named color in a [r,g,b[,a]] array
 182      *
 183      * @param string $colorName
 184      *
 185      * @return array|null
 186      */
 187     public static function colorNameToRGBa($colorName)
 188     {
 189         if (is_string($colorName) && isset(static::$cssColors[$colorName])) {
 190             $rgba = explode(',', static::$cssColors[$colorName]);
 191
 192             // only case with opacity is transparent, with opacity=0, so we can intval on opacity also
 193             $rgba = array_map('intval', $rgba);
 194
 195             return $rgba;
 196         }
 197
 198         return null;
 199     }
 200
 201     /**
 202      * Reverse conversion : from RGBA to a color name if possible
 203      *
 204      * @param integer $r
 205      * @param integer $g
 206      * @param integer $b
 207      * @param integer $a
 208      *
 209      * @return string|null
 210      */
 211     public static function RGBaToColorName($r, $g, $b, $a = 1)
 212     {
 213         static $reverseColorTable = null;
 214
 215         if (! is_numeric($r) || ! is_numeric($g) || ! is_numeric($b) || ! is_numeric($a)) {
 216             return null;
 217         }
 218
 219         if ($a < 1) {
 220             # specific case we dont' revert according to spec
 221             #if (! $a && ! $r && ! $g && ! $b) {
 222             #    return 'transparent';
 223             #}
 224
 225             return null;
 226         }
 227
 228         if (is_null($reverseColorTable)) {
 229             $reverseColorTable = [];
 230
 231             foreach (static::$cssColors as $name => $rgb_str) {
 232                 $rgb_str = explode(',', $rgb_str);
 233
 234                 if (count($rgb_str) == 3) {
 235                     $reverseColorTable[intval($rgb_str[0])][intval($rgb_str[1])][intval($rgb_str[2])] = $name;
 236                 }
 237             }
 238         }
 239
 240         if (isset($reverseColorTable[intval($r)][intval($g)][intval($b)])) {
 241             return $reverseColorTable[intval($r)][intval($g)][intval($b)];
 242         }
 243
 244         return null;
 245     }
 246 }