public function compileTemplateSource()
    {
        if (!$this->source->recompiled) {
            $this->properties['file_dependency'] = array();
            if ($this->source->components) {
                // for the extends resource the compiler will fill it
                // uses real resource for file dependency
                // $source = end($this->source->components);
                // $this->properties['file_dependency'][$this->source->uid] = array($this->source->filepath, $this->source->timestamp, $source->type);
            } else {
                $this->properties['file_dependency'][$this->source->uid] = array($this->source->filepath, $this->source->timestamp, $this->source->type);
            }
        }
        // compile locking
        if ($this->smarty->compile_locking && !$this->source->recompiled) {
            if ($saved_timestamp = $this->compiled->timestamp) {
                touch($this->compiled->filepath);
            }
        }
        // call compiler
        try {
            $code = $this->compiler->compileTemplate($this);
        }
        catch (Exception $e) {
            // restore old timestamp in case of error
            if ($this->smarty->compile_locking && !$this->source->recompiled && $saved_timestamp) {
                touch($this->compiled->filepath, $saved_timestamp);
            }
            throw $e;
        }
        // compiling succeded
        if (!$this->source->recompiled && $this->compiler->write_compiled_code) {
            // write compiled template
            $_filepath = $this->compiled->filepath;
            if ($_filepath === false) {
                throw new SmartyException('getCompiledFilepath() did not return a destination to save the compiled template to');
            }
            Smarty_Internal_Write_File::writeFile($_filepath, $code, $this->smarty);
            $this->compiled->exists = true;
            $this->compiled->isCompiled = true;
        }
        // release compiler object to free memory
        unset($this->compiler);
    }