Proyectos de Subversion Moodle

<?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;

    }

}