smarty/libs/sysplugins/smarty_internal_smartytemplatecompiler.php

<?php
/**
 * Smarty Internal Plugin Smarty Template Compiler Base
 *
 * This file contains the basic classes and methodes for compiling Smarty templates with lexer/parser
 *
 * @package Smarty
 * @subpackage Compiler
 * @author Uwe Tews
 */

/**
 * @ignore
 */
include ("smarty_internal_parsetree.php");

/**
 * Class SmartyTemplateCompiler
 *
 * @package Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_SmartyTemplateCompiler extends Smarty_Internal_TemplateCompilerBase {

    /**
     * Lexer class name
     *
     * @var string
     */
    public $lexer_class;

    /**
     * Parser class name
     *
     * @var string
     */
    public $parser_class;

    /**
     * Lexer object
     *
     * @var object
     */
    public $lex;

    /**
     * Parser object
     *
     * @var object
     */
    public $parser;

    /**
     * Smarty object
     *
     * @var object
     */
    public $smarty;

    /**
     * array of vars which can be compiled in local scope
     *
     * @var array
     */
    public $local_var = array();

    /**
     * Initialize compiler
     *
     * @param string $lexer_class  class name
     * @param string $parser_class class name
     * @param Smarty $smarty       global instance
     */
    public function __construct($lexer_class, $parser_class, $smarty)
    {
        $this->smarty = $smarty;
        parent::__construct();
        // get required plugins
        $this->lexer_class = $lexer_class;
        $this->parser_class = $parser_class;
    }

    /**
     * Methode to compile a Smarty template
     *
     * @param  mixed $_content template source
     * @return bool true if compiling succeeded, false if it failed
     */
    protected function doCompile($_content)
    {
        /* here is where the compiling takes place. Smarty
          tags in the templates are replaces with PHP code,
          then written to compiled files. */
        // init the lexer/parser to compile the template
        $this->lex = new $this->lexer_class($_content, $this);
        $this->parser = new $this->parser_class($this->lex, $this);
        if ($this->smarty->_parserdebug)
            $this->parser->PrintTrace();
        // get tokens from lexer and parse them
        while ($this->lex->yylex() && !$this->abort_and_recompile) {
            if ($this->smarty->_parserdebug) {
                echo "<pre>Line {$this->lex->line} Parsing  {$this->parser->yyTokenName[$this->lex->token]} Token " .
                    htmlentities($this->lex->value) . "</pre>";
            }
            $this->parser->doParse($this->lex->token, $this->lex->value);
        }

        if ($this->abort_and_recompile) {
            // exit here on abort
            return false;
        }
        // finish parsing process
        $this->parser->doParse(0, 0);
        // check for unclosed tags
        if (count($this->_tag_stack) > 0) {
            // get stacked info
            list($openTag, $_data) = array_pop($this->_tag_stack);
            $this->trigger_template_error("unclosed {" . $openTag . "} tag");
        }
        // return compiled code
        // return str_replace(array("? >\n<?php","? ><?php"), array('',''), $this->parser->retvalue);
        return $this->parser->retvalue;
    }

}

?>