private function CSSmin::shortenNamedColors in Advanced CSS/JS Aggregation 7.2

Shortens all named colors with a shorter HEX counterpart for a set of safe properties e.g. white -> #fff

Parameters

string $css:

Return value

string

1 call to CSSmin::shortenNamedColors()

CSSmin::minify in advagg_css_compress/yui/CSSMin.inc

Minifies the given input CSS string

File

advagg_css_compress/yui/CSSMin.inc, line 716

Class

CSSmin

Code

private function shortenNamedColors($css) {
  $patterns = array();
  $replacements = array();
  $longNamedColors = array(
    'aliceblue' => '#f0f8ff',
    'antiquewhite' => '#faebd7',
    'aquamarine' => '#7fffd4',
    'black' => '#000',
    'blanchedalmond' => '#ffebcd',
    'blueviolet' => '#8a2be2',
    'burlywood' => '#deb887',
    'cadetblue' => '#5f9ea0',
    'chartreuse' => '#7fff00',
    'chocolate' => '#d2691e',
    'cornflowerblue' => '#6495ed',
    'cornsilk' => '#fff8dc',
    'darkblue' => '#00008b',
    'darkcyan' => '#008b8b',
    'darkgoldenrod' => '#b8860b',
    'darkgray' => '#a9a9a9',
    'darkgreen' => '#006400',
    'darkgrey' => '#a9a9a9',
    'darkkhaki' => '#bdb76b',
    'darkmagenta' => '#8b008b',
    'darkolivegreen' => '#556b2f',
    'darkorange' => '#ff8c00',
    'darkorchid' => '#9932cc',
    'darksalmon' => '#e9967a',
    'darkseagreen' => '#8fbc8f',
    'darkslateblue' => '#483d8b',
    'darkslategray' => '#2f4f4f',
    'darkslategrey' => '#2f4f4f',
    'darkturquoise' => '#00ced1',
    'darkviolet' => '#9400d3',
    'deeppink' => '#ff1493',
    'deepskyblue' => '#00bfff',
    'dodgerblue' => '#1e90ff',
    'firebrick' => '#b22222',
    'floralwhite' => '#fffaf0',
    'forestgreen' => '#228b22',
    'fuchsia' => '#f0f',
    'gainsboro' => '#dcdcdc',
    'ghostwhite' => '#f8f8ff',
    'goldenrod' => '#daa520',
    'greenyellow' => '#adff2f',
    'honeydew' => '#f0fff0',
    'indianred' => '#cd5c5c',
    'lavender' => '#e6e6fa',
    'lavenderblush' => '#fff0f5',
    'lawngreen' => '#7cfc00',
    'lemonchiffon' => '#fffacd',
    'lightblue' => '#add8e6',
    'lightcoral' => '#f08080',
    'lightcyan' => '#e0ffff',
    'lightgoldenrodyellow' => '#fafad2',
    'lightgray' => '#d3d3d3',
    'lightgreen' => '#90ee90',
    'lightgrey' => '#d3d3d3',
    'lightpink' => '#ffb6c1',
    'lightsalmon' => '#ffa07a',
    'lightseagreen' => '#20b2aa',
    'lightskyblue' => '#87cefa',
    'lightslategray' => '#778899',
    'lightslategrey' => '#778899',
    'lightsteelblue' => '#b0c4de',
    'lightyellow' => '#ffffe0',
    'limegreen' => '#32cd32',
    'mediumaquamarine' => '#66cdaa',
    'mediumblue' => '#0000cd',
    'mediumorchid' => '#ba55d3',
    'mediumpurple' => '#9370db',
    'mediumseagreen' => '#3cb371',
    'mediumslateblue' => '#7b68ee',
    'mediumspringgreen' => '#00fa9a',
    'mediumturquoise' => '#48d1cc',
    'mediumvioletred' => '#c71585',
    'midnightblue' => '#191970',
    'mintcream' => '#f5fffa',
    'mistyrose' => '#ffe4e1',
    'moccasin' => '#ffe4b5',
    'navajowhite' => '#ffdead',
    'olivedrab' => '#6b8e23',
    'orangered' => '#ff4500',
    'palegoldenrod' => '#eee8aa',
    'palegreen' => '#98fb98',
    'paleturquoise' => '#afeeee',
    'palevioletred' => '#db7093',
    'papayawhip' => '#ffefd5',
    'peachpuff' => '#ffdab9',
    'powderblue' => '#b0e0e6',
    'rebeccapurple' => '#663399',
    'rosybrown' => '#bc8f8f',
    'royalblue' => '#4169e1',
    'saddlebrown' => '#8b4513',
    'sandybrown' => '#f4a460',
    'seagreen' => '#2e8b57',
    'seashell' => '#fff5ee',
    'slateblue' => '#6a5acd',
    'slategray' => '#708090',
    'slategrey' => '#708090',
    'springgreen' => '#00ff7f',
    'steelblue' => '#4682b4',
    'turquoise' => '#40e0d0',
    'white' => '#fff',
    'whitesmoke' => '#f5f5f5',
    'yellow' => '#ff0',
    'yellowgreen' => '#9acd32',
  );
  $propertiesWithColors = array(
    'color',
    'background(?:-color)?',
    'border(?:-(?:top|right|bottom|left|color)(?:-color)?)?',
    'outline(?:-color)?',
    '(?:text|box)-shadow',
  );
  $regStart = '/(;|\\{)(' . implode('|', $propertiesWithColors) . '):([^;}]*)\\b';
  $regEnd = '\\b/iS';
  foreach ($longNamedColors as $colorName => $colorCode) {
    $patterns[] = $regStart . $colorName . $regEnd;
    $replacements[] = '$1$2:$3' . $colorCode;
  }

  // Run at least 4 times to cover most cases (same color used several times for the same property)
  for ($i = 0; $i < 4; $i++) {
    $css = preg_replace($patterns, $replacements, $css);
  }
  return $css;
}