<?php
class XenForo_Helper_Color
{
/**
* Named HTML / CSS colors and their hex values.
* Matches the list provided in color_picker.js
*
* @var array
*/
public static $colors = array(
'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',
'darkkhaki' => 'bdb76b',
'darkmagenta' => '8b008b',
'darkolivegreen' => '556b2f',
'darkorange' => 'ff8c00',
'darkorchid' => '9932cc',
'darkred' => '8b0000',
'darksalmon' => 'e9967a',
'darkseagreen' => '8fbc8f',
'darkslateblue' => '483d8b',
'darkslategray' => '2f4f4f',
'darkturquoise' => '00ced1',
'darkviolet' => '9400d3',
'deeppink' => 'ff1493',
'deepskyblue' => '00bfff',
'dimgray' => '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',
'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',
'lightgrey' => 'd3d3d3',
'lightgreen' => '90ee90',
'lightpink' => 'ffb6c1',
'lightsalmon' => 'ffa07a',
'lightseagreen' => '20b2aa',
'lightskyblue' => '87cefa',
'lightslategray' => '778899',
'lightsteelblue' => 'b0c4de',
'lightyellow' => 'ffffe0',
'lime' => '00ff00',
'limegreen' => '32cd32',
'linen' => 'faf0e6',
'magenta' => 'ff00ff',
'maroon' => '800000',
'mediumaquamarine' => '66cdaa',
'mediumblue' => '0000cd',
'mediumorchid' => 'ba55d3',
'mediumpurple' => '9370d8',
'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' => 'd87093',
'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',
'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'
);
/**
* Regular expression to match an RGB color.
* Components captured to 1=r, 2=g, 3=b.
*
* @var string
*/
public static $rgbRegex = '/^rgb\(\s*(\d+%?)\s*,\s*(\d+%?)\s*,\s*(\d+%?)\s*\)$/i';
/**
* Regular expression to match an RGBA color.
* Components captured to 1=r, 2=g, 3=b, 4=a.
*
* @var string
*/
public static $rgbaRegex = '/^rgba\(\s*(\d+%?)\s*,\s*(\d+%?)\s*,\s*(\d+%?)\s*,\s*([0-1](\.\d+)?)\s*\)$/i';
/**
* Converts a color (named, hex or rgb) into an RGBA string
* Supports namedcolor, #abc, #abcdef and rgb(0, 128, 255)
*
* @param string $color
* @param float $alpha
*
* @return string Returns the original color if an RGBA match cannot be made
*/
public static function rgba($color, $alpha)
{
if (!$color)
{
return $color;
}
$color = strtolower($color);
if (strpos($color, 'rgb') !== 0)
{
if ($color[0] == '#')
{
$color = substr($color, 1);
switch (strlen($color))
{
case 3:
$color = "$color[0]$color[0]$color[1]$color[1]$color[2]$color[2]";
break;
case 6:
// already ok
break;
default:
return '#' . $color;
}
}
else if (isset(self::$colors[$color]))
{
$color = self::$colors[$color];
}
else
{
return $color;
}
$rgb = array(
1 => hexdec(substr($color, 0, 2)),
2 => hexdec(substr($color, 2, 2)),
3 => hexdec(substr($color, 4, 2)),
);
}
else if (!preg_match(self::$rgbRegex, $color, $rgb))
{
return $color;
}
return sprintf('rgba(%s, %s, %s, %s)', $rgb[1], $rgb[2], $rgb[3], $alpha);
}
/**
* Converts a color into a non-alpha-transparent version.
* Supports named color, #abc, #abcdef and rgb(a)
*
* @param string $color
*
* @return string
*/
public static function unRgba($color)
{
if (substr(strtolower($color), 0, 4) == 'rgba' && preg_match(self::$rgbaRegex, $color, $rgba))
{
$color = sprintf('rgb(%s, %s, %s)', $rgba[1], $rgba[2], $rgba[3]);
}
return $color;
}
}