121 lines
4.9 KiB
PHP
121 lines
4.9 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Definition for list containers ul and ol.
|
|
*/
|
|
class HTMLPurifier_ChildDef_List extends HTMLPurifier_ChildDef
|
|
{
|
|
public $type = 'list';
|
|
// lying a little bit, so that we can handle ul and ol ourselves
|
|
// XXX: This whole business with 'wrap' is all a bit unsatisfactory
|
|
public $elements = array('li' => true, 'ul' => true, 'ol' => true);
|
|
public function validateChildren($tokens_of_children, $config, $context) {
|
|
// Flag for subclasses
|
|
$this->whitespace = false;
|
|
|
|
// if there are no tokens, delete parent node
|
|
if (empty($tokens_of_children)) return false;
|
|
|
|
// the new set of children
|
|
$result = array();
|
|
|
|
// current depth into the nest
|
|
$nesting = 0;
|
|
|
|
// a little sanity check to make sure it's not ALL whitespace
|
|
$all_whitespace = true;
|
|
|
|
$seen_li = false;
|
|
$need_close_li = false;
|
|
|
|
foreach ($tokens_of_children as $token) {
|
|
if (!empty($token->is_whitespace)) {
|
|
$result[] = $token;
|
|
continue;
|
|
}
|
|
$all_whitespace = false; // phew, we're not talking about whitespace
|
|
|
|
if ($nesting == 1 && $need_close_li) {
|
|
$result[] = new HTMLPurifier_Token_End('li');
|
|
$nesting--;
|
|
$need_close_li = false;
|
|
}
|
|
|
|
$is_child = ($nesting == 0);
|
|
|
|
if ($token instanceof HTMLPurifier_Token_Start) {
|
|
$nesting++;
|
|
} elseif ($token instanceof HTMLPurifier_Token_End) {
|
|
$nesting--;
|
|
}
|
|
|
|
if ($is_child) {
|
|
if ($token->name === 'li') {
|
|
// good
|
|
$seen_li = true;
|
|
} elseif ($token->name === 'ul' || $token->name === 'ol') {
|
|
// we want to tuck this into the previous li
|
|
$need_close_li = true;
|
|
$nesting++;
|
|
if (!$seen_li) {
|
|
// create a new li element
|
|
$result[] = new HTMLPurifier_Token_Start('li');
|
|
} else {
|
|
// backtrack until </li> found
|
|
while(true) {
|
|
$t = array_pop($result);
|
|
if ($t instanceof HTMLPurifier_Token_End) {
|
|
// XXX actually, these invariants could very plausibly be violated
|
|
// if we are doing silly things with modifying the set of allowed elements.
|
|
// FORTUNATELY, it doesn't make a difference, since the allowed
|
|
// elements are hard-coded here!
|
|
if ($t->name !== 'li') {
|
|
trigger_error("Only li present invariant violated in List ChildDef", E_USER_ERROR);
|
|
return false;
|
|
}
|
|
break;
|
|
} elseif ($t instanceof HTMLPurifier_Token_Empty) { // bleagh
|
|
if ($t->name !== 'li') {
|
|
trigger_error("Only li present invariant violated in List ChildDef", E_USER_ERROR);
|
|
return false;
|
|
}
|
|
// XXX this should have a helper for it...
|
|
$result[] = new HTMLPurifier_Token_Start('li', $t->attr, $t->line, $t->col, $t->armor);
|
|
break;
|
|
} else {
|
|
if (!$t->is_whitespace) {
|
|
trigger_error("Only whitespace present invariant violated in List ChildDef", E_USER_ERROR);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// start wrapping (this doesn't precisely mimic
|
|
// browser behavior, but what browsers do is kind of
|
|
// hard to mimic in a standards compliant way
|
|
// XXX Actually, this has no impact in practice,
|
|
// because this gets handled earlier. Arguably,
|
|
// we should rip out all of that processing
|
|
$result[] = new HTMLPurifier_Token_Start('li');
|
|
$nesting++;
|
|
$seen_li = true;
|
|
$need_close_li = true;
|
|
}
|
|
}
|
|
$result[] = $token;
|
|
}
|
|
if ($need_close_li) {
|
|
$result[] = new HTMLPurifier_Token_End('li');
|
|
}
|
|
if (empty($result)) return false;
|
|
if ($all_whitespace) {
|
|
return false;
|
|
}
|
|
if ($tokens_of_children == $result) return true;
|
|
return $result;
|
|
}
|
|
}
|
|
|
|
// vim: et sw=4 sts=4
|