php 让Kohana使用第三方模版引擎

Kohana的视图层很简单，变量数据放在$_data数组中。所以继承Kohana_View类并覆写部分方法，就可以非常轻松的使用第三方模版引擎作为视图层。这里的例子是使用Blitz Template，如果要用Smarty之类的也可以类似修改。文件在application/classes/stucampus/system/view.php下，可以修改，但是修改要和命名空间对应。至于如何支持命名空间，见这里

view.php

<?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);
    }

}