让Kohana使用第三方模版引擎

<?php
namespace StuCampus\System;
class View extends \Kohana_View
{
	/**
	 * 模版引擎
	 * 
	 * @var \Blitz
	 */
	protected static $templateEngine = null;

	/**
	 * Returns a new View object. If you do not define the "file" parameter,
	 * you must call [View::set_filename].
	 *
	 *     $view = View::factory($file);
	 *
	 * @param   string  view filename
	 * @param   array   array of values
	 * @return  View
	 */
	public static function factory($file = NULL, array $data = NULL)
	{
		return new self($file, $data);
	}

	/**
	 * Captures the output that is generated when a view is included.
	 * The view data will be extracted to make local variables. This method
	 * is static to prevent object scope resolution.
	 *
	 *     $output = View::capture($file, $data);
	 *
	 * @param   string  filename
	 * @param   array   variables
	 * @return  string
	 */
	protected static function capture($kohana_view_filename, array $kohana_view_data)
	{
		// 覆写parent
		$params = array_merge($kohana_view_data, self::$_global_data);
		$output = self::$templateEngine->parse($params);
		return $output;
	}

	/**
	 * 设置视图的文件名
	 *
	 * @example $view->set_filename($file);
	 *
	 * @param   string  view filename
	 * @return  View
	 * @throws  \Kohana_View_Exception
	 */
	public function set_filename($file)
	{
		$return = parent::set_filename($file);
		
		// 初始化试图引擎
		self::$templateEngine = new \Blitz($this->_file);

		return $return;
	}

	/**
	 * 解析模板
	 * 
	 * @see Kohana_View::render()
	 */
	public function render($file = NULL)
	{
		// 这个方法和parent一样的，但是parent没有使用静态延迟绑定，所以只好重写一次= =#
		if ($file !== NULL)
		{
			$this->set_filename($file);
		}

		if (empty($this->_file))
		{
			throw new Kohana_View_Exception('You must set the file to use within your view before rendering');
		}

		// Combine local and global data and capture the output
		return View::capture($this->_file, $this->_data);
	}
	
}