Support/Comments for Hide Editor

//<?php
/**
 * @name       Hide Editor
 * @author     Timon Reinhard <[email protected]>
 *             Gildas         <[email protected]>
 *
 * @license    GNU General Public License
 * @version    0.3.3 - 03/04/07
 *
 * @purpose    Hides editor if active template contains no content var
 *             Listens to event 'OnDocFormRender'
 *
 * @history    [Gildas      - 0.3.1 - 01/12/06] Replace setAttribute() by style.cssText for IE compatibility
 *             [Gildas      - 0.3.2 - 01/12/06] Add support for Template load via an "Include" snippet
 *             [Kratos      - 0.3.2 - 03/03/07] Add support for Default Template when creating new document (http://modxcms.com/forums/index.php/topic,2151.msg84156.html#msg84156)
 *             [Gildas      - 0.3.3 - 03/04/07] Add support for [*content*] in a Chunk (http://modxcms.com/forums/index.php?topic=13613.msg89816#msg89816)
 * 
 * @install    - Copy and paste the plugin code (without the begin/end PHP tags)
 *             - Select the "OnDocFormRender" event
 *             - If your templates are load via an "Include" snippet then add the folowing virtual parameter "content=true"
 *             - If your templates contain the content tag in a Chunk add this comment : <!-- {content} -->
 *
 * @todo       - Try to use JQuery like "Customize Manager Fields" http://modxcms.com/forums/index.php?topic=12493
 *   
 * @see        http://www.quirksmode.org/bugreports/archives/2005/03/setAttribute_does_not_work_in_IE_when_used_with_th.html
 */
global $content, $default_template;

/*
 * Collect current MODx Event & Template ID
 */
$e      = &$modx->Event;
$tempid = (isset($content['template']) ? $content['template'] : $default_template);

/*
 * Check the Event and the document content
 */
if (($e->name == 'OnDocFormRender') && ($tempid > 0)) {
    /*
     * Load the document template 
     */
    if (($template = $modx->db->getValue("SELECT content FROM {$modx->db->config['table_prefix']}site_templates WHERE id = $tempid")) !== false) {
        /*
         * Check for a "content" tag in the template
         */
        if ((strpos($template, '[*content*]') === false) && (strpos($template, '[*#content*]') === false) && (strpos($template, 'content=true') === false) && (strpos($template, '<!-- {content} -->') === false)) {
            /*
             * Create the JS code to hide the "Document area"
             */
            $output = '<!-- HideEditor Plugin -->';
            $output.= '<script type="text/javascript">';
            $output.= 'document.getElementById(\'ta\').parentNode.parentNode.previousSibling.style.cssText = \'display:none\';';
            $output.= 'document.getElementById(\'ta\').parentNode.parentNode.style.cssText = \'display:none\';';
            $output.= '</script>';
            
            /*
             * Output the JS code 
             */
            $e->output($output);
        }
    }
}