<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2010 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id$

/**
 +------------------------------------------------------------------------------
 * ThinkPHP内置模板引擎类
 * 支持XML标签和普通标签的模板解析
 * 编译型模板引擎 支持动态缓存
 +------------------------------------------------------------------------------
 * @category   Think
 * @package  Think
 * @subpackage  Template
 * @author liu21st <liu21st@gmail.com>
 * @version  $Id$
 +------------------------------------------------------------------------------
 */
class  ThinkTemplate extends Think
{//类定义开始

    // 模板页面中引入的标签库列表
    protected $tagLib          =  array();
    // 当前模板文件
    protected $templateFile  =  '';
    // 模板变量
    public $tVar                 = array();
    public $config  =  array();
    private   $literal = array();

    /**
     +----------------------------------------------------------
     * 取得模板实例对象
     * 静态方法
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return ThinkTemplate
     +----------------------------------------------------------
     */
    static public function  getInstance()
    {
        return get_instance_of(__CLASS__);
    }

    /**
     +----------------------------------------------------------
     * 架构函数
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param array $config 模板引擎配置数组
     +----------------------------------------------------------
     */
    public function __construct(){
        $this->config['cache_path']        =  C('CACHE_PATH');
        $this->config['template_suffix']   =  C('TMPL_TEMPLATE_SUFFIX');
        $this->config['cache_suffix']       =  C('TMPL_CACHFILE_SUFFIX');
        $this->config['tmpl_cache']        =  C('TMPL_CACHE_ON');
        $this->config['cache_time']        =  C('TMPL_CACHE_TIME');
        $this->config['taglib_begin']        =  $this->stripPreg(C('TAGLIB_BEGIN'));
        $this->config['taglib_end']          =  $this->stripPreg(C('TAGLIB_END'));
        $this->config['tmpl_begin']         =  $this->stripPreg(C('TMPL_L_DELIM'));
        $this->config['tmpl_end']           =  $this->stripPreg(C('TMPL_R_DELIM'));
        $this->config['default_tmpl']       =  C('TMPL_FILE_NAME');
        $this->config['tag_level']            =  C('TAG_NESTED_LEVEL');
    }

    private function stripPreg($str) {
        $str = str_replace(array('{','}','(',')','|','[',']'),array('\{','\}','\(','\)','\|','\[','\]'),$str);
        return $str;
    }

    // 模板变量获取和设置
    public function get($name) {
        if(isset($this->tVar[$name]))
            return $this->tVar[$name];
        else
            return false;
    }

    public function set($name,$value) {
        $this->tVar[$name]= $value;
    }

    // 加载模板
    public function load($templateFile,$templateVar,$charset) {
        $this->tVar = $templateVar;
        $templateCacheFile  =  $this->loadTemplate($templateFile);
        // 模板阵列变量分解成为独立变量
        extract($templateVar, EXTR_OVERWRITE);
        //载入模版缓存文件
        include $templateCacheFile;
    }

    /**
     +----------------------------------------------------------
     * 加载主模板并缓存
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $tmplTemplateFile 模板文件
     * @param string $varPrefix  模板变量前缀
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     * @throws ThinkExecption
     +----------------------------------------------------------
     */
    public function loadTemplate ($tmplTemplateFile='')
    {
        if(empty($tmplTemplateFile))    $tmplTemplateFile = $this->config['default_tmpl'];
        if(!is_file($tmplTemplateFile)){
            $tmplTemplateFile =  dirname($this->config['default_tmpl']).'/'.$tmplTemplateFile.$this->config['template_suffix'];
            if(!is_file($tmplTemplateFile))
                throw_exception(L('_TEMPLATE_NOT_EXIST_'));
        }
        $this->templateFile    =  $tmplTemplateFile;

        //根据模版文件名定位缓存文件
        $tmplCacheFile = $this->config['cache_path'].md5($tmplTemplateFile).$this->config['cache_suffix'];
        $tmplContent = '';
        // 检查Cache文件是否需要更新
        if (!$this->checkCache($tmplTemplateFile)) {
            // 需要更新模版 读出原模板内容
            $tmplContent = file_get_contents($tmplTemplateFile);
            //编译模板内容
            $tmplContent = $this->compiler($tmplContent);
            // 检测分组目录
            if(!is_dir($this->config['cache_path']))
                mk_dir($this->config['cache_path']);
            //重写Cache文件
            if( false === file_put_contents($tmplCacheFile,trim($tmplContent)))
                throw_exception(L('_CACHE_WRITE_ERROR_'));
        }
        return $tmplCacheFile;
    }

    /**
     +----------------------------------------------------------
     * 编译模板文件内容
     +----------------------------------------------------------
     * @access protected
     +----------------------------------------------------------
     * @param mixed $tmplContent 模板内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    protected function compiler( $tmplContent)
    {
        //模板解析
        $tmplContent = $this->parse($tmplContent);
        if(ini_get('short_open_tag'))
            // 开启短标签的情况要将<?标签用echo方式输出 否则无法正常输出xml标识
            $tmplContent = preg_replace('/(<\?(?!php|=|$))/i', '<?php echo \'\\1\'; ?>'."\n", $tmplContent );
        // 还原被替换的Literal标签
        $tmplContent = preg_replace('/<!--###literal(\d)###-->/eis',"\$this->restoreLiteral('\\1')",$tmplContent);
        // 添加安全代码
        $tmplContent  =  '<?php if (!defined(\'THINK_PATH\')) exit();?>'.$tmplContent;
        if(C('TMPL_STRIP_SPACE')) {
            /* 去除html空格与换行 */
            $find     = array("~>\s+<~","~>(\s+\n|\r)~");
            $replace  = array("><",">");
            $tmplContent = preg_replace($find, $replace, $tmplContent);
        }
        return trim($tmplContent);
    }

    /**
     +----------------------------------------------------------
     * 检查缓存文件是否有效
     * 如果无效则需要重新更新
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $tmplTemplateFile  模板文件名
     +----------------------------------------------------------
     * @return boolen
     +----------------------------------------------------------
     */
    protected function checkCache($tmplTemplateFile)
    {
        if (!$this->config['tmpl_cache']) // 优先对配置检测
            return false;
        $tmplCacheFile = $this->config['cache_path'].md5($tmplTemplateFile).$this->config['cache_suffix'];
        if(!is_file($tmplCacheFile)){
            return false;
        }elseif (filemtime($tmplTemplateFile) > filemtime($tmplCacheFile)) {
            // 模板文件如果有更新则缓存需要更新
            return false;
        }elseif ($this->config['cache_time'] != -1 && time() > filemtime($tmplCacheFile)+$this->config['cache_time']) {
            // 缓存是否在有效期
            return false;
        }
        //缓存有效
        return true;
    }

    /**
     +----------------------------------------------------------
     * 模板解析入口
     * 支持普通标签和TagLib解析 支持自定义标签库
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $content 要解析的模板内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parse($content)
    {
        $begin = $this->config['taglib_begin'];
        $end   = $this->config['taglib_end'];
        // 首先替换literal标签内容
        $content = preg_replace('/'.$begin.'literal'.$end.'(.*?)'.$begin.'\/literal'.$end.'/eis',"\$this->parseLiteral('\\1')",$content);

        // 获取需要引入的标签库列表
        // 标签库只需要定义一次，允许引入多个一次
        // 一般放在文件的最前面
        // 格式：<taglib name="html,mytag..." />
        // 当TAGLIB_LOAD配置为true时才会进行检测
        if(C('TAGLIB_LOAD')) {
            $this->getIncludeTagLib($content);
            if(!empty($this->tagLib)) {
                // 对导入的TagLib进行解析
                $_taglibs = C('_taglibs_');
                foreach($this->tagLib as $tagLibName) {
                    // 内置标签库
                    $tagLibName   = strtolower($tagLibName);
                    if(!import('Think.Template.TagLib.TagLib'.ucwords($tagLibName))) {
                        // 扩展标签库
                        if($_taglibs && isset($_taglibs[$tagLibName]))
                            // 'tagLibName'=>'importPath'
                            import($_taglibs[$tagLibName]);
                        else
                            throw_exception($tagLibName.L('_TAGLIB_NOT_EXIST_'));
                    }
                    $this->parseTagLib($tagLibName,$content);
                }
            }
        }
        // 预先加载的标签库 无需在每个模板中使用taglib标签加载
        if(C('TAGLIB_PRE_LOAD')) {
            $tagLibs =  explode(',',C('TAGLIB_PRE_LOAD'));
            foreach ($tagLibs as $tag){
                $this->parseTagLib($tag,$content);
            }
        }
        // 内置标签库 无需使用taglib标签导入就可以使用
        $tagLibs =  explode(',',C('TAGLIB_BUILD_IN'));
        foreach ($tagLibs as $tag){
            $this->parseTagLib($tag,$content,true);
        }
        //解析普通模板标签 {tagName:}
        $content = preg_replace('/('.$this->config['tmpl_begin'].')(\S.+?)('.$this->config['tmpl_end'].')/eis',"\$this->parseTag('\\2')",$content);
        return $content;
    }

    /**
     +----------------------------------------------------------
     * 替换页面中的literal标签
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $content  模板内容
     +----------------------------------------------------------
     * @return string|false
     +----------------------------------------------------------
     */
    function parseLiteral($content) {
        if(trim($content)=='')
            return '';
        $content = stripslashes($content);
        $i  =   count($this->literal);
        $parseStr   =   "<!--###literal{$i}###-->";
        $this->literal[$i]  = $content;
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * 还原被替换的literal标签
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $tag  literal标签序号
     +----------------------------------------------------------
     * @return string|false
     +----------------------------------------------------------
     */
    function restoreLiteral($tag) {
        // 还原literal标签
        $parseStr   =  $this->literal[$tag];
        // 销毁literal记录
        unset($this->literal[$tag]);
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * 搜索模板页面中包含的TagLib库
     * 并返回列表
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $content  模板内容
     +----------------------------------------------------------
     * @return string|false
     +----------------------------------------------------------
     */
    public function getIncludeTagLib(& $content)
    {
        //搜索是否有TagLib标签
        $find = preg_match('/'.$this->config['taglib_begin'].'taglib\s(.+?)(\s*?)\/'.$this->config['taglib_end'].'\W/is',$content,$matches);
        if($find) {
            //替换TagLib标签
            $content = str_replace($matches[0],'',$content);
            //解析TagLib标签
            $tagLibs = $matches[1];
            $xml =  '<tpl><tag '.$tagLibs.' /></tpl>';
            $xml = simplexml_load_string($xml);
            if(!$xml)
                throw_exception(L('_XML_TAG_ERROR_'));
            $xml = (array)($xml->tag->attributes());
            $array = array_change_key_case($xml['@attributes']);
            $this->tagLib = explode(',',$array['name']);
        }
        return;
    }

    /**
     +----------------------------------------------------------
     * TagLib库解析
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $tagLib 要解析的标签库
     * @param string $content 要解析的模板内容
     * @param boolen $hide 是否隐藏标签库前缀
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parseTagLib($tagLib,&$content,$hide=false)
    {
        $begin = $this->config['taglib_begin'];
        $end   = $this->config['taglib_end'];
        $tLib =  Think::instance('TagLib'.ucwords(strtolower($tagLib)));
        foreach ($tLib->tags as $name=>$val){
            $tags = array();
            if(isset($val['alias'])) {// 别名设置
                $tags = explode(',',$val['alias']);
                $tags[]  =  $name;
            }else{
                $tags[] = $name;
            }
            $level = isset($val['level'])?$val['level']:1;
            $closeTag = isset($val['close'])?$val['close']:true;
            foreach ($tags as $tag){
                // 实际要解析的标签名称
                $parseTag = !$hide?$tagLib.':'.$tag:$tag;
                if(empty($val['attr'])){
                    // 无属性标签
                    if(!$closeTag) {
                        $content = preg_replace('/'.$begin.$parseTag.'(\s*?)\/(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','')",$content);
                    }else{
                        for($i=0;$i<$level;$i++)
                            $content = preg_replace('/'.$begin.$parseTag.'(\s*?)'.$end.'(.*?)'.$begin.'\/'.$parseTag.'(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','\\2')",$content);
                    }
                }else{
                    if(!$closeTag) {
                        $content = preg_replace('/'.$begin.$parseTag.'\s(.*?)\/(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','')",$content);
                    }else{
                        for($i=0;$i<$level;$i++)
                            $content = preg_replace('/'.$begin.$parseTag.'\s(.*?)'.$end.'(.*?)'.$begin.'\/'.$parseTag.'(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','\\2')",$content);
                    }
                }
            }
        }
    }

    /**
     +----------------------------------------------------------
     * 解析标签库的标签
     * 需要调用对应的标签库文件解析类
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $tagLib  标签库名称
     * @param string $tag  标签名
     * @param string $attr  标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string|false
     +----------------------------------------------------------
     */
    public function parseXmlTag($tagLib,$tag,$attr,$content)
    {
        //if (MAGIC_QUOTES_GPC) {
            $attr = stripslashes($attr);
            $content = stripslashes($content);
        //}
        if(ini_get('magic_quotes_sybase'))
            $attr =  str_replace('\"','\'',$attr);
        $tLib =  get_instance_of('TagLib'.ucwords(strtolower($tagLib)));
        $parse = '_'.$tag;
        $content = trim($content);
        return $tLib->$parse($attr,$content);
    }

    /**
     +----------------------------------------------------------
     * 模板标签解析
     * 格式： {TagName:args [|content] }
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $tagStr 标签内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parseTag($tagStr){
        //if (MAGIC_QUOTES_GPC) {
            $tagStr = stripslashes($tagStr);
        //}
        //还原非模板标签
        if(preg_match('/^[\s|\d]/is',$tagStr))
            //过滤空格和数字打头的标签
            return C('TMPL_L_DELIM') . $tagStr .C('TMPL_R_DELIM');
        $flag =  substr($tagStr,0,1);
        $name   = substr($tagStr,1);
        if('$' == $flag){
            //解析模板变量 格式 {$varName}
            return $this->parseVar($name);
        }elseif(':' == $flag){
            // 输出某个函数的结果
            return  '<?php echo '.$name.';?>';
        }elseif('~' == $flag){
            // 执行某个函数
            return  '<?php '.$name.';?>';
        }elseif('&' == $flag){
            // 输出配置参数
            return '<?php echo C("'.$name.'");?>';
        }elseif('%' == $flag){
            // 输出语言变量
            return '<?php echo L("'.$name.'");?>';
		}elseif('@' == $flag){
			// 输出SESSION变量
            if(strpos($name,'.')) {
                $array   =  explode('.',$name);
	    		return '<?php echo $_SESSION["'.$array[0].'"]["'.$array[1].'"];?>';
            }else{
    			return '<?php echo $_SESSION["'.$name.'"];?>';
            }
		}elseif('#' == $flag){
			// 输出COOKIE变量
            if(strpos($name,'.')) {
                $array   =  explode('.',$name);
	    		return '<?php echo $_COOKIE["'.$array[0].'"]["'.$array[1].'"];?>';
            }else{
    			return '<?php echo $_COOKIE["'.$name.'"];?>';
            }
		}elseif('.' == $flag){
            // 输出GET变量
            return '<?php echo $_GET["'.$name.'"];?>';
        }elseif('^' == $flag){
            // 输出POST变量
            return '<?php echo $_POST["'.$name.'"];?>';
        }elseif('*' == $flag){
            // 输出常量
            return '<?php echo constant("'.$name.'");?>';
        }

        $tagStr = trim($tagStr);
        if(substr($tagStr,0,2)=='//' || (substr($tagStr,0,2)=='/*' && substr($tagStr,-2)=='*/'))
            //注释标签
            return '';

        //解析其它标签
        //统一标签格式 {TagName:args [|content]}
        $pos =  strpos($tagStr,':');
        $tag  =  substr($tagStr,0,$pos);
        $args = trim(substr($tagStr,$pos+1));

        //解析标签内容
        if(!empty($args)) {
            $tag  =  strtolower($tag);
            switch($tag){
                case 'include':
                    return $this->parseInclude($args);
                    break;
                case 'load':
                    return $this->parseLoad($args);
                    break;
                //这里扩展其它标签
                //…………
                default:
                    if(C('TAG_EXTEND_PARSE')) {
                        $method = C('TAG_EXTEND_PARSE');
                        if(array_key_exists($tag,$method))
                            return $method[$tag]($args);
                    }
            }
        }
        return C('TMPL_L_DELIM') . $tagStr .C('TMPL_R_DELIM');
    }


    /**
     +----------------------------------------------------------
     * 加载js或者css文件
     * {load:__PUBLIC__/Js/Think/ThinkAjax.js} 加载js文件
     * {load:__PUBLIC__/Css/style.css} 加载css文件
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $params  参数
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parseLoad($str) {
        $type       = strtolower(substr(strrchr($str, '.'),1));
        $parseStr = '';
        if($type=='js') {
            $parseStr .= '<script type="text/javascript" src="'.$str.'"></script>';
        }elseif($type=='css') {
            $parseStr .= '<link rel="stylesheet" type="text/css" href="'.$str.'" />';
        }
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * 模板变量解析,支持使用函数
     * 格式： {$varname|function1|function2=arg1,arg2}
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $varStr 变量数据
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parseVar($varStr){
        $varStr = trim($varStr);
        static $_varParseList = array();
        //如果已经解析过该变量字串，则直接返回变量值
        if(isset($_varParseList[$varStr])) return $_varParseList[$varStr];
        $parseStr ='';
        $varExists = true;
        if(!empty($varStr)){
            $varArray = explode('|',$varStr);
            //取得变量名称
            $var = array_shift($varArray);
            //非法变量过滤 不允许在变量里面使用 ->
            //TODO：还需要继续完善
            if(preg_match('/->/is',$var))
                return '';
            if('Think.' == substr($var,0,6)){
                // 所有以Think.打头的以特殊变量对待 无需模板赋值就可以输出
                $name = $this->parseThinkVar($var);
            }
            elseif( false !== strpos($var,'.')) {
                //支持 {$var.property}
                $vars = explode('.',$var);
                $var  =  array_shift($vars);
                switch(strtolower(C('TMPL_VAR_IDENTIFY'))) {
                    case 'array': // 识别为数组
                        $name = '$'.$var;
                        foreach ($vars as $key=>$val)
                            $name .= '["'.$val.'"]';
                        break;
                    case 'obj':  // 识别为对象
                        $name = '$'.$var;
                        foreach ($vars as $key=>$val)
                            $name .= '->'.$val;
                        break;
                    default:  // 自动判断数组或对象 只支持二维
                        $name = 'is_array($'.$var.')?$'.$var.'["'.$vars[0].'"]:$'.$var.'->'.$vars[0];
                }
            }
            elseif(false !==strpos($var,'::')){
                //支持 {$var:property} 方式输出对象的属性
                $vars = explode('::',$var);
                $var  =  str_replace('::','->',$var);
                $name = "$".$var;
                $var  = $vars[0];
            }
            elseif(false !== strpos($var,'[')) {
                //支持 {$var['key']} 方式输出数组
                $name = "$".$var;
                preg_match('/(.+?)\[(.+?)\]/is',$var,$match);
                $var = $match[1];
            }
            else {
                $name = "$$var";
            }
            //对变量使用函数
            if(count($varArray)>0)
                $name = $this->parseVarFunction($name,$varArray);
            $parseStr = '<?php echo ('.$name.'); ?>';
        }
        $_varParseList[$varStr] = $parseStr;
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * 对模板变量使用函数
     * 格式 {$varname|function1|function2=arg1,arg2}
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $name 变量名
     * @param array $varArray  函数列表
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parseVarFunction($name,$varArray){
        //对变量使用函数
        $length = count($varArray);
        //取得模板禁止使用函数列表
        $template_deny_funs = explode(',',C('TMPL_DENY_FUNC_LIST'));
        for($i=0;$i<$length ;$i++ ){
            if (0===stripos($varArray[$i],'default='))
                $args = explode('=',$varArray[$i],2);
            else
                $args = explode('=',$varArray[$i]);
            //模板函数过滤
            $args[0] = trim($args[0]);
            switch(strtolower($args[0])) {
            case 'default':  // 特殊模板函数
                $name   = '('.$name.')?('.$name.'):'.$args[1];
                break;
            default:  // 通用模板函数
                if(!in_array($args[0],$template_deny_funs)){
                    if(isset($args[1])){
                        if(strstr($args[1],'###')){
                            $args[1] = str_replace('###',$name,$args[1]);
                            $name = "$args[0]($args[1])";
                        }else{
                            $name = "$args[0]($name,$args[1])";
                        }
                    }else if(!empty($args[0])){
                        $name = "$args[0]($name)";
                    }
                }
            }
        }
        return $name;
    }

    /**
     +----------------------------------------------------------
     * 特殊模板变量解析
     * 格式 以 $Think. 打头的变量属于特殊模板变量
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $varStr  变量字符串
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parseThinkVar($varStr){
        $vars = explode('.',$varStr);
        $vars[1] = strtoupper(trim($vars[1]));
        $parseStr = '';
        if(count($vars)>=3){
            $vars[2] = trim($vars[2]);
            switch($vars[1]){
                case 'SERVER':
                    $parseStr = '$_SERVER[\''.strtoupper($vars[2]).'\']';break;
                case 'GET':
                    $parseStr = '$_GET[\''.$vars[2].'\']';break;
                case 'POST':
                    $parseStr = '$_POST[\''.$vars[2].'\']';break;
                case 'COOKIE':
                    if(isset($vars[3])) {
                        $parseStr = '$_COOKIE[\''.$vars[2].'\'][\''.$vars[3].'\']';
                    }else{
                        $parseStr = '$_COOKIE[\''.$vars[2].'\']';
                    }break;
                case 'SESSION':
                    if(isset($vars[3])) {
                        $parseStr = '$_SESSION[\''.$vars[2].'\'][\''.$vars[3].'\']';
                    }else{
                        $parseStr = '$_SESSION[\''.$vars[2].'\']';
                    }
                    break;
                case 'ENV':
                    $parseStr = '$_ENV[\''.$vars[2].'\']';break;
                case 'REQUEST':
                    $parseStr = '$_REQUEST[\''.$vars[2].'\']';break;
                case 'CONST':
                    $parseStr = strtoupper($vars[2]);break;
                case 'LANG':
                    $parseStr = 'L("'.$vars[2].'")';break;
				case 'CONFIG':
                    if(isset($vars[3])) {
                        $vars[2] .= '.'.$vars[3];
                    }
                    $parseStr = 'C("'.$vars[2].'")';break;
                default:break;
            }
        }else if(count($vars)==2){
            switch($vars[1]){
                case 'NOW':
                    $parseStr = "date('Y-m-d g:i a',time())";
                    break;
                case 'VERSION':
                    $parseStr = 'THINK_VERSION';
                    break;
                case 'TEMPLATE':
                    $parseStr = 'C("TMPL_FILE_NAME")';
                    break;
                case 'LDELIM':
                    $parseStr = 'C("TMPL_L_DELIM")';
                    break;
                case 'RDELIM':
                    $parseStr = 'C("TMPL_R_DELIM")';
                    break;
                default:
                    if(defined($vars[1]))
                        $parseStr = $vars[1];
            }
        }
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * 加载公共模板并缓存 和当前模板在同一路径，否则使用相对路径
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $tmplPublicName  公共模板文件名
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function parseInclude($tmplPublicName){
        if(substr($tmplPublicName,0,1)=='$')
            //支持加载变量文件名
            $tmplPublicName = $this->get(substr($tmplPublicName,1));

        if(is_file($tmplPublicName)) {
            // 直接包含文件
            $parseStr = file_get_contents($tmplPublicName);
        }else {
            $tmplPublicName  = str_replace(array('@',':'),'/',$tmplPublicName);
            $count   =  substr_count($tmplPublicName,'/'); 
            $path   = dirname(C('TMPL_FILE_NAME'));
            for($i=0;$i<$count;$i++)
                $path   = dirname($path);
            $templateFile =  $path.'/'.$tmplPublicName.$this->config['template_suffix'];
            $parseStr = file_get_contents($templateFile);
        }
        //再次对包含文件进行模板分析
        return $this->parse($parseStr);
    }

}//类定义结束
?>