protected function generateViewFile($sourceFile,$viewFile)
{
    static $regexRules=array(
        '<%=?\s*(.*?)\s*%>',        // PHP statements or expressions
        '<\/?(com|cache|clip):([\w\.]+)\s*((?:\s*\w+\s*=\s*\'.*?(?<!\\\\)\'|\s*\w+\s*=\s*".*?(?<!\\\\)"|\s*\w+\s*=\s*\{.*?\})*)\s*\/?>', // component tags
        '<!---.*?--->',    // template comments
    );
    $this->_sourceFile=$sourceFile;
    $this->_input=file_get_contents($sourceFile);
    $n=preg_match_all('/'.implode('|',$regexRules).'/msS',$this->_input,$matches,PREG_SET_ORDER|PREG_OFFSET_CAPTURE);
    $textStart=0;
    $this->_output="<?php /* source file: $sourceFile */ ?>\n";
    for($i=0;$i<$n;++$i)
    {
        $match=&$matches[$i];
        $str=$match[0][0];
        $matchStart=$match[0][1];
        $matchEnd=$matchStart+strlen($str)-1;

        if($matchStart>$textStart)
            $this->_output.=substr($this->_input,$textStart,$matchStart-$textStart);
        $textStart=$matchEnd+1;

        if(strpos($str,'<com:')===0)    // opening component tag
        {
            $type=$match[3][0];
            if($str[strlen($str)-2]!=='/')  // open tag
                $this->_output.=$this->processBeginWidget($type,$match[4][0],$match[2][1]);
            else
                $this->_output.=$this->processWidget($type,$match[4][0],$match[2][1]);
        }
        elseif(strpos($str,'</com:')===0)    // closing component tag
            $this->_output.=$this->processEndWidget($match[3][0],$match[2][1]);
        elseif(strpos($str,'<cache:')===0)    // opening cache tag
        {
            $id=$match[3][0];
            if($str[strlen($str)-2]!=='/')  // open tag
                $this->_output.=$this->processBeginCache($id,$match[4][0],$match[2][1]);
            else
                $this->_output.=$this->processCache($id,$match[4][0],$match[2][1]);
        }
        elseif(strpos($str,'</cache:')===0)    // closing cache tag
            $this->_output.=$this->processEndCache($match[3][0],$match[2][1]);
        elseif(strpos($str,'<clip:')===0)    // opening clip tag
        {
            $id=$match[3][0];
            if($str[strlen($str)-2]!=='/')  // open tag
                $this->_output.=$this->processBeginClip($id,$match[4][0],$match[2][1]);
            else
                $this->_output.=$this->processClip($id,$match[4][0],$match[2][1]);
        }
        elseif(strpos($str,'</clip:')===0)    // closing clip tag
            $this->_output.=$this->processEndClip($match[3][0],$match[2][1]);
        elseif(strpos($str,'<%=')===0)    // expression
            $this->_output.=$this->processExpression($match[1][0],$match[1][1]);
        elseif(strpos($str,'<%')===0)    // statement
            $this->_output.=$this->processStatement($match[1][0],$match[1][1]);
    }
    if($textStart<strlen($this->_input))
        $this->_output.=substr($this->_input,$textStart);

    file_put_contents($viewFile,$this->_output);
}