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/plugins/vjCommentPlugin/lib/tools/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Nmtokens.php

https://bitbucket.org/Kudlaty/360kdw
PHP | 52 lines | 22 code | 11 blank | 19 comment | 2 complexity | 8face464a844799e3aab2e9f4f918868 MD5 | raw file
 1<?php
 2
 3/**
 4 * Validates contents based on NMTOKENS attribute type.
 5 */
 6class HTMLPurifier_AttrDef_HTML_Nmtokens extends HTMLPurifier_AttrDef
 7{
 8
 9    public function validate($string, $config, $context) {
10
11        $string = trim($string);
12
13        // early abort: '' and '0' (strings that convert to false) are invalid
14        if (!$string) return false;
15
16        $tokens = $this->split($string, $config, $context);
17        $tokens = $this->filter($tokens, $config, $context);
18        if (empty($tokens)) return false;
19        return implode(' ', $tokens);
20
21    }
22
23    /**
24     * Splits a space separated list of tokens into its constituent parts.
25     */
26    protected function split($string, $config, $context) {
27        // OPTIMIZABLE!
28        // do the preg_match, capture all subpatterns for reformulation
29
30        // we don't support U+00A1 and up codepoints or
31        // escaping because I don't know how to do that with regexps
32        // and plus it would complicate optimization efforts (you never
33        // see that anyway).
34        $pattern = '/(?:(?<=\s)|\A)'. // look behind for space or string start
35                   '((?:--|-?[A-Za-z_])[A-Za-z_\-0-9]*)'.
36                   '(?:(?=\s)|\z)/'; // look ahead for space or string end
37        preg_match_all($pattern, $string, $matches);
38        return $matches[1];
39    }
40
41    /**
42     * Template method for removing certain tokens based on arbitrary criteria.
43     * @note If we wanted to be really functional, we'd do an array_filter
44     *       with a callback. But... we're not.
45     */
46    protected function filter($tokens, $config, $context) {
47        return $tokens;
48    }
49
50}
51
52// vim: et sw=4 sts=4