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8f797be836
- can be used via html class like:
$clean_html = html::purify($html);
- using it now in eTemplate to remove malicious code from html:
a) when displaying "formatted text"
b) when "formatted text" get's input by the user
143 lines
5.4 KiB
PHP
Executable File
143 lines
5.4 KiB
PHP
Executable File
<?php
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/**
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* Definition for tables
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*/
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class HTMLPurifier_ChildDef_Table extends HTMLPurifier_ChildDef
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{
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public $allow_empty = false;
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public $type = 'table';
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public $elements = array('tr' => true, 'tbody' => true, 'thead' => true,
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'tfoot' => true, 'caption' => true, 'colgroup' => true, 'col' => true);
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public function __construct() {}
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public function validateChildren($tokens_of_children, $config, $context) {
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if (empty($tokens_of_children)) return false;
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// this ensures that the loop gets run one last time before closing
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// up. It's a little bit of a hack, but it works! Just make sure you
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// get rid of the token later.
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$tokens_of_children[] = false;
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// only one of these elements is allowed in a table
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$caption = false;
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$thead = false;
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$tfoot = false;
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// as many of these as you want
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$cols = array();
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$content = array();
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$nesting = 0; // current depth so we can determine nodes
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$is_collecting = false; // are we globbing together tokens to package
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// into one of the collectors?
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$collection = array(); // collected nodes
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$tag_index = 0; // the first node might be whitespace,
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// so this tells us where the start tag is
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foreach ($tokens_of_children as $token) {
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$is_child = ($nesting == 0);
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if ($token === false) {
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// terminating sequence started
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} elseif ($token instanceof HTMLPurifier_Token_Start) {
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$nesting++;
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} elseif ($token instanceof HTMLPurifier_Token_End) {
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$nesting--;
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}
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// handle node collection
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if ($is_collecting) {
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if ($is_child) {
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// okay, let's stash the tokens away
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// first token tells us the type of the collection
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switch ($collection[$tag_index]->name) {
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case 'tr':
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case 'tbody':
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$content[] = $collection;
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break;
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case 'caption':
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if ($caption !== false) break;
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$caption = $collection;
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break;
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case 'thead':
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case 'tfoot':
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// access the appropriate variable, $thead or $tfoot
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$var = $collection[$tag_index]->name;
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if ($$var === false) {
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$$var = $collection;
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} else {
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// transmutate the first and less entries into
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// tbody tags, and then put into content
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$collection[$tag_index]->name = 'tbody';
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$collection[count($collection)-1]->name = 'tbody';
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$content[] = $collection;
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}
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break;
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case 'colgroup':
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$cols[] = $collection;
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break;
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}
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$collection = array();
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$is_collecting = false;
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$tag_index = 0;
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} else {
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// add the node to the collection
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$collection[] = $token;
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}
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}
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// terminate
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if ($token === false) break;
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if ($is_child) {
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// determine what we're dealing with
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if ($token->name == 'col') {
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// the only empty tag in the possie, we can handle it
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// immediately
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$cols[] = array_merge($collection, array($token));
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$collection = array();
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$tag_index = 0;
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continue;
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}
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switch($token->name) {
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case 'caption':
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case 'colgroup':
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case 'thead':
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case 'tfoot':
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case 'tbody':
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case 'tr':
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$is_collecting = true;
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$collection[] = $token;
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continue;
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default:
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if (!empty($token->is_whitespace)) {
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$collection[] = $token;
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$tag_index++;
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}
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continue;
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}
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}
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}
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if (empty($content)) return false;
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$ret = array();
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if ($caption !== false) $ret = array_merge($ret, $caption);
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if ($cols !== false) foreach ($cols as $token_array) $ret = array_merge($ret, $token_array);
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if ($thead !== false) $ret = array_merge($ret, $thead);
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if ($tfoot !== false) $ret = array_merge($ret, $tfoot);
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foreach ($content as $token_array) $ret = array_merge($ret, $token_array);
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if (!empty($collection) && $is_collecting == false){
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// grab the trailing space
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$ret = array_merge($ret, $collection);
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}
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array_pop($tokens_of_children); // remove phantom token
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return ($ret === $tokens_of_children) ? true : $ret;
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}
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}
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// vim: et sw=4 sts=4
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