| 1: | <?php
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| 6: | class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
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| 7: | {
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| 15: | public function validate($string, $config, $context)
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| 16: | {
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| 17: | static $colors = null;
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| 18: | if ($colors === null) {
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| 19: | $colors = $config->get('Core.ColorKeywords');
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| 20: | }
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| 21: |
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| 22: | $string = trim($string);
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| 23: |
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| 24: | if (empty($string)) {
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| 25: | return false;
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| 26: | }
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| 27: | $lower = strtolower($string);
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| 28: | if (isset($colors[$lower])) {
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| 29: | return $colors[$lower];
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| 30: | }
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| 31: | if ($string[0] === '#') {
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| 32: | $hex = substr($string, 1);
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| 33: | } else {
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| 34: | $hex = $string;
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| 35: | }
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| 36: |
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| 37: | $length = strlen($hex);
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| 38: | if ($length !== 3 && $length !== 6) {
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| 39: | return false;
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| 40: | }
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| 41: | if (!ctype_xdigit($hex)) {
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| 42: | return false;
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| 43: | }
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| 44: | if ($length === 3) {
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| 45: | $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
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| 46: | }
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| 47: | return "#$hex";
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| 48: | }
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| 49: | }
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