mirror of https://github.com/friendica/friendica
57 lines
1.6 KiB
PHP
57 lines
1.6 KiB
PHP
<?php
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/**
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* Decorator which enables !important to be used in CSS values.
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*/
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class HTMLPurifier_AttrDef_CSS_ImportantDecorator extends HTMLPurifier_AttrDef
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{
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/**
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* @type HTMLPurifier_AttrDef
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*/
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public $def;
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/**
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* @type bool
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*/
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public $allow;
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/**
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* @param HTMLPurifier_AttrDef $def Definition to wrap
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* @param bool $allow Whether or not to allow !important
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*/
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public function __construct($def, $allow = false)
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{
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$this->def = $def;
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$this->allow = $allow;
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}
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/**
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* Intercepts and removes !important if necessary
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* @param string $string
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return bool|string
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*/
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public function validate($string, $config, $context)
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{
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// test for ! and important tokens
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$string = trim($string);
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$is_important = false;
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// :TODO: optimization: test directly for !important and ! important
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if (strlen($string) >= 9 && substr($string, -9) === 'important') {
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$temp = rtrim(substr($string, 0, -9));
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// use a temp, because we might want to restore important
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if (strlen($temp) >= 1 && substr($temp, -1) === '!') {
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$string = rtrim(substr($temp, 0, -1));
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$is_important = true;
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}
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}
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$string = $this->def->validate($string, $config, $context);
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if ($this->allow && $is_important) {
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$string .= ' !important';
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}
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return $string;
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}
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}
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// vim: et sw=4 sts=4
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