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