<?php require_once 'HTMLPurifier/ChildDef.php'; /** * Definition that allows a set of elements, but disallows empty children. */ class HTMLPurifier_ChildDef_Required extends HTMLPurifier_ChildDef { /** * Lookup table of allowed elements. * @public */ var $elements = array(); /** * @param $elements List of allowed element names (lowercase). */ function HTMLPurifier_ChildDef_Required($elements) { if (is_string($elements)) { $elements = str_replace(' ', '', $elements); $elements = explode('|', $elements); } $keys = array_keys($elements); if ($keys == array_keys($keys)) { $elements = array_flip($elements); foreach ($elements as $i => $x) { $elements[$i] = true; if (empty($i)) unset($elements[$i]); } } $this->elements = $elements; $this->gen = new HTMLPurifier_Generator(); } var $allow_empty = false; var $type = 'required'; function validateChildren($tokens_of_children, $config, &$context) { // if there are no tokens, delete parent node if (empty($tokens_of_children)) return false; // the new set of children $result = array(); // current depth into the nest $nesting = 0; // whether or not we're deleting a node $is_deleting = false; // whether or not parsed character data is allowed // this controls whether or not we silently drop a tag // or generate escaped HTML from it $pcdata_allowed = isset($this->elements['#PCDATA']); // a little sanity check to make sure it's not ALL whitespace $all_whitespace = true; // some configuration $escape_invalid_children = $config->get('Core', 'EscapeInvalidChildren'); foreach ($tokens_of_children as $token) { if (!empty($token->is_whitespace)) { $result[] = $token; continue; } $all_whitespace = false; // phew, we're not talking about whitespace $is_child = ($nesting == 0); if ($token->type == 'start') { $nesting++; } elseif ($token->type == 'end') { $nesting--; } if ($is_child) { $is_deleting = false; if (!isset($this->elements[$token->name])) { $is_deleting = true; if ($pcdata_allowed && $token->type == 'text') { $result[] = $token; } elseif ($pcdata_allowed && $escape_invalid_children) { $result[] = new HTMLPurifier_Token_Text( $this->gen->generateFromToken($token, $config) ); } continue; } } if (!$is_deleting || ($pcdata_allowed && $token->type == 'text')) { $result[] = $token; } elseif ($pcdata_allowed && $escape_invalid_children) { $result[] = new HTMLPurifier_Token_Text( $this->gen->generateFromToken( $token, $config ) ); } else { // drop silently } } if (empty($result)) return false; if ($all_whitespace) return false; if ($tokens_of_children == $result) return true; return $result; } } ?>