function process(&$tree, $data, &$pipeline)
{
if (is_a($tree, 'TextBox')) {
// Ignore completely empty text boxes
if (count($tree->words) == 0) {
return;
}
switch ($tree->words[0]) {
case '##PAGE##':
$parent =& $tree->parent;
$field = BoxTextFieldPageNo::from_box($tree);
$parent->insert_before($field, $tree);
$parent->remove($tree);
break;
case '##PAGES##':
$parent =& $tree->parent;
$field = BoxTextFieldPages::from_box($tree);
$parent->insert_before($field, $tree);
$parent->remove($tree);
break;
case '##FILENAME##':
if (is_null($this->filename)) {
$tree->words[0] = $data->get_uri();
} else {
$tree->words[0] = $this->filename;
}
break;
case '##FILESIZE##':
if (is_null($this->filesize)) {
$tree->words[0] = strlen($data->get_content());
} else {
$tree->words[0] = $this->filesize;
}
break;
case '##TIMESTAMP##':
$tree->words[0] = $this->_timestamp;
break;
}
} elseif (is_a($tree, 'GenericContainerBox')) {
for ($i = 0; $i < count($tree->content); $i++) {
$this->process($tree->content[$i], $data, $pipeline);
}
}
}