mirror of
https://github.com/ezyang/htmlpurifier.git
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314a48373c
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@308 48356398-32a2-884e-a903-53898d9a118a
56 lines
1.7 KiB
PHP
56 lines
1.7 KiB
PHP
<?php
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require_once 'HTMLPurifier/AttrDef.php';
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require_once 'HTMLPurifier/AttrDef/Number.php';
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/**
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* Represents a Length as defined by CSS.
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* @warning Be sure not to confuse this with HTMLPurifier_AttrDef_Length!
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*/
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class HTMLPurifier_AttrDef_CSSLength extends HTMLPurifier_AttrDef
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{
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/**
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* Valid unit lookup table.
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* @warning The code assumes all units are two characters long. Be careful
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* if we have to change this behavior!
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*/
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var $units = array('em' => true, 'ex' => true, 'px' => true, 'in' => true,
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'cm' => true, 'mm' => true, 'pt' => true, 'pc' => true);
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/**
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* Instance of HTMLPurifier_AttrDef_Number to defer number validation to
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*/
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var $number_def;
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/**
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* @param $non_negative Bool indication whether or not negative values are
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* allowed.
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*/
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function HTMLPurifier_AttrDef_CSSLength($non_negative = false) {
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$this->number_def = new HTMLPurifier_AttrDef_Number($non_negative);
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}
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function validate($length, $config, &$context) {
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$length = $this->parseCDATA($length);
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if ($length === '') return false;
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if ($length === '0') return '0';
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$strlen = strlen($length);
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if ($strlen === 1) return false; // impossible!
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// we assume all units are two characters
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$unit = substr($length, $strlen - 2);
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$number = substr($length, 0, $strlen - 2);
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if (!isset($this->units[$unit])) return false;
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$number = $this->number_def->validate($number, $config, $context);
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if ($number === false) return false;
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return $number . $unit;
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}
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}
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?>
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