<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

defined('THINK_PATH') or exit();
/**
 * 系统行为扩展：模板内容输出替换
 * @category   Think
 * @package  Think
 * @subpackage  Behavior
 * @author   liu21st <liu21st@gmail.com>
 */
class ContentReplaceBehavior extends Behavior {
    // 行为参数定义
    protected $options   =  array(
        'TMPL_PARSE_STRING' =>  array(),
    );

    // 行为扩展的执行入口必须是run
    public function run(&$content){
        $content = $this->templateContentReplace($content);
    }

    /**
     * 模板内容替换
     * @access protected
     * @param string $content 模板内容
     * @return string
     */
    protected function templateContentReplace($content) {
        // 系统默认的特殊变量替换
        $replace =  array(
            '__TMPL__'      =>  APP_TMPL_PATH,  // 项目模板目录
            '__ROOT__'      =>  __ROOT__,       // 当前网站地址
            '__APP__'       =>  __APP__,        // 当前项目地址
            '__GROUP__'     =>  defined('GROUP_NAME')?__GROUP__:__APP__,
            '__ACTION__'    =>  __ACTION__,     // 当前操作地址
            '__SELF__'      =>  __SELF__,       // 当前页面地址
            '__URL__'       =>  __URL__,
            '../Public'     =>  APP_TMPL_PATH.'Public',// 项目公共模板目录
            '__PUBLIC__'    =>  __ROOT__.'/Public',// 站点公共目录
        );
        // 允许用户自定义模板的字符串替换
        if(is_array(C('TMPL_PARSE_STRING')) )
            $replace =  array_merge($replace,C('TMPL_PARSE_STRING'));
        $content = str_replace(array_keys($replace),array_values($replace),$content);
        return $content;
    }

}
