mirror of
https://github.com/ezyang/htmlpurifier.git
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59 lines
1.7 KiB
PHP
59 lines
1.7 KiB
PHP
<?php
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/**
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* Framework class for strings that involve multiple values.
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*
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* Certain CSS properties such as border-width and margin allow multiple
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* lengths to be specified. This class can take a vanilla border-width
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* definition and multiply it, usually into a max of four.
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*
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* @note Even though the CSS specification isn't clear about it, inherit
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* can only be used alone: it will never manifest as part of a multi
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* shorthand declaration. Thus, this class does not allow inherit.
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*/
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class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
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{
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/**
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* Instance of component definition to defer validation to.
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* @todo Make protected
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*/
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public $single;
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/**
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* Max number of values allowed.
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* @todo Make protected
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*/
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public $max;
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/**
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* @param $single HTMLPurifier_AttrDef to multiply
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* @param $max Max number of values allowed (usually four)
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*/
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public function __construct($single, $max = 4) {
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$this->single = $single;
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$this->max = $max;
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}
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public function validate($string, $config, $context) {
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$string = $this->parseCDATA($string);
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if ($string === '') return false;
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$parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
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$length = count($parts);
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$final = '';
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for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
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if (ctype_space($parts[$i])) continue;
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$result = $this->single->validate($parts[$i], $config, $context);
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if ($result !== false) {
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$final .= $result . ' ';
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$num++;
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}
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}
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if ($final === '') return false;
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return rtrim($final);
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}
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}
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// vim: et sw=4 sts=4
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