<?php
/*
 * Copyright 2008 Marc Mongenet
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

function process_output_element($econf, $in_elm, $out_elm) {
	$add_attr_value = get_w2ml_attribute_value($in_elm, 'add');
	$to_attr_value  = get_w2ml_attribute_value($in_elm, 'to');
	if ($add_attr_value !== NULL && $to_attr_value !== NULL) {
		log_error('<w2ml:output> has both add and to attributes', $econf->log);
	}
	elseif ($add_attr_value !== NULL) {
		process_output_add_element($econf, $out_elm, $add_attr_value);
	}
	elseif ($to_attr_value !== NULL) {
		process_output_to_element($econf, $out_elm, $to_attr_value);
	}
}


function process_output_add_element($econf, $out_elm, $add) {
	if ($add !== 'null') {
		log_error('Unknown <w2ml:output> attribute value add="'.$add.'"', $econf->log);
	}
}


function process_output_to_element($econf, $out_elm, $to) {
	if ($to === 'null') {
		output_to_null($out_elm);
	} else {
		log_error('Unknown <w2ml:output> attribute value to="'.$to.'"', $econf->log);
	}
}


function output_to_null($out_elm) {
	$out_elm->parentNode->removeChild($out_elm);
}

?>