Extended Content Vote Code

<?php
/**
* @version      $Revision: 1.3$
* @package      Joomla
* @license      GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

// no direct access
defined( '_JEXEC' ) or die( 'Restricted access' );

jimport( 'joomla.plugin.plugin' );

define('VOTEEXT_PATH', dirname(__FILE__).DS.'voteext');

class plgContentVoteExt extends JPlugin
{
    function plgContentVoteExt(&$subject, $params)
    {
        parent::__construct($subject, $params);
        $this->loadLanguage();
    }
    
    function onAfterDisplayTitle(&$article, &$params, $limitstart)
    {
        if (3 == $this->params->get('display_at', 1)) {
            return $this->render($article, $params, $limitstart);
        }
        return '';
    }
    
    function onBeforeDisplayContent(&$article, &$params, $limitstart)
    {
        if (1 == $this->params->get('display_at', 1)) {
            return $this->render($article, $params, $limitstart);
        }
        return '';
    }
    
    function onAfterDisplayContent(&$article, &$params, $limitstart)
    {
        if (2 == $this->params->get('display_at', 1)) {
            return $this->render($article, $params, $limitstart);
        }
        return '';
    }
    
    /**
     * $html = current($mainframe->triggerEvent('onContentVote', array(&$this->article, &$this->params, 1)));
     * echo $html;     
     */         
    function onContentVote(&$article, &$params, $limitstart)
    {
        return $this->render($article, $params, $limitstart);
    }
    
    function render( &$row, &$params, $page=0 )
    {
        $uri = & JFactory::getURI();
    
        $id     = $row->id;
        $html   = '';
    
        if ($params->get( 'show_vote' ) && !$params->get( 'popup' ))
        {
            global $mainframe;
            $override = JPATH_SITE.DS.'templates'.DS.$mainframe->getTemplate().DS.'html'.DS.'plg_content_voteext'.DS.'default.php';
            ob_start();
            if (is_readable($override)) {
                include($override);
            }
            else if (is_readable(VOTEEXT_PATH.DS.'tmpl'.DS.'default.php')) {
                include(VOTEEXT_PATH.DS.'tmpl'.DS.'default.php');
            }
            else {
                JError::raiseError(500, JText::_('Failed to load default.php'));
            }
            $html = ob_get_clean();
        }
        return $html;
    }
}