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<?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();
/**
* array of callbacks called when the normal compile process of template is finished
*
* @var array
*/
public $postCompileCallbacks = array();
/**
* prefix code
*
* @var string
*/
public $prefixCompiledCode = '';
/**
* postfix code
*
* @var string
*/
public $postfixCompiledCode = '';
/**
* 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 $smarty)
{
parent::__construct($smarty);
// 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->parser =
new $this->parser_class(new $this->lexer_class(str_replace(array("\r\n", "\r"), "\n", $_content), $this),
$this);
if ($isTemplateSource && $this->template->caching) {
$this->parser->insertPhpCode("<?php\n\$_smarty_tpl->compiled->nocache_hash = '{$this->nocache_hash}';\n?>\n");
}
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();
$this->parser->lex->PrintTrace();
}
// get tokens from lexer and parse them
while ($this->parser->lex->yylex()) {
if ($this->smarty->_parserdebug) {
echo "<pre>Line {$this->parser->lex->line} Parsing {$this->parser->yyTokenName[$this->parser->lex->token]} Token " .
htmlentities($this->parser->lex->value) . "</pre>";
}
$this->parser->doParse($this->parser->lex->token, $this->parser->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");
}
// call post compile callbacks
foreach ($this->postCompileCallbacks as $cb) {
$parameter = $cb;
$parameter[0] = $this;
call_user_func_array($cb[0], $parameter);
}
// return compiled code
return $this->prefixCompiledCode . $this->parser->retvalue . $this->postfixCompiledCode;
}
/**
* Register a post compile callback
* - when the callback is called after template compiling the compiler object will be inserted as first parameter
*
* @param callback $callback
* @param array $parameter optional parameter array
* @param string $key optional key for callback
* @param bool $replace if true replace existing keyed callback
*/
public function registerPostCompileCallback($callback, $parameter = array(), $key = null, $replace = false)
{
array_unshift($parameter, $callback);
if (isset($key)) {
if ($replace || !isset($this->postCompileCallbacks[$key])) {
$this->postCompileCallbacks[$key] = $parameter;
}
} else {
$this->postCompileCallbacks[] = $parameter;
}
}
/**
* Remove a post compile callback
*
* @param string $key callback key
*/
public function unregisterPostCompileCallback($key)
{
unset($this->postCompileCallbacks[$key]);
}
}
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