dedecms调用指定模板源码分析

function GetTempletFile()
    {
        global $cfg_basedir,$cfg_templets_dir,$cfg_df_style;
        $cid = $this->ChannelUnit->ChannelInfos['nid'];
        if(!empty($this->Fields['templet']))
        {
            $filetag = MfTemplet($this->Fields['templet']);
          //  if( !preg_match("#\/#", $filetag) ) $filetag = $GLOBALS['cfg_df_style'].'/'.$filetag;
        }
        else
        {
            $filetag = MfTemplet($this->TypeLink->TypeInfos["temparticle"]);

        }
        $tid = $this->Fields['typeid'];
        $filetag = str_replace('{cid}', $cid,$filetag);
        $filetag = str_replace('{tid}', $tid,$filetag);
        $tmpfile = $cfg_basedir.$cfg_templets_dir.'/'.$filetag;
        if($cid=='spec')
        {
            if( !empty($this->Fields['templet']) )
            {
                $tmpfile = $cfg_basedir.$cfg_templets_dir.'/'.$filetag;
            }
            else
            {
                $tmpfile = $cfg_basedir.$cfg_templets_dir."/{$cfg_df_style}/article_spec.htm";
            }
        }
        if(!file_exists($tmpfile))
        {
            $tmpfile = $cfg_basedir.$cfg_templets_dir."/{$cfg_df_style}/".($cid=='spec' ? 'article_spec.htm' : 'article_default.htm');
        }
        if (!preg_match("#.htm$#", $tmpfile)) return FALSE;
        return $tmpfile;
    }