smarty/libs/sysplugins/smarty_internal_smartytemplatecompiler.php

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


/**
 * 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;

    /**
     * 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;
    }

    /**
     * method to compile a Smarty template
     *
     * @param  mixed $_content template source
     * @param bool   $isTemplateSource
     *
     * @return bool true if compiling succeeded, false if it failed
     * @throws \SmartyCompilerException
     */
    protected function doCompile($_content, $isTemplateSource = false)
    {
        /* 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(str_replace(array("\r\n", "\r"), "\n", $_content), $this);
        $this->parser = new $this->parser_class($this->lex, $this);
        if ($isTemplateSource) {
            $this->parser->insertPhpCode("<?php\n\$_smarty_tpl->properties['nocache_hash'] = '{$this->nocache_hash}';\n?>\n");
        }
        if ($this->inheritance_child) {
            // start state on child templates
            $this->lex->yypushstate(Smarty_Internal_Templatelexer::CHILDBODY);
        }
        if (function_exists('mb_internal_encoding') && ((int) ini_get('mbstring.func_overload')) & 2) {
            $mbEncoding = mb_internal_encoding();
            mb_internal_encoding('ASCII');
        } else {
            $mbEncoding = null;
        }

        if ($this->smarty->_parserdebug) {
            $this->parser->PrintTrace();
            $this->lex->PrintTrace();
        }
        // get tokens from lexer and parse them
        while ($this->lex->yylex()) {
            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);
        }

        // finish parsing process
        $this->parser->doParse(0, 0);
        if ($mbEncoding) {
            mb_internal_encoding($mbEncoding);
        }
        // check for unclosed tags
        if (count($this->_tag_stack) > 0) {
            // get stacked info
            list($openTag, $_data) = array_pop($this->_tag_stack);
            $this->trigger_template_error("unclosed {$this->smarty->left_delimiter}" . $openTag . "{$this->smarty->right_delimiter} tag");
        }
        // return compiled code
        return $this->parser->retvalue;
    }
}