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smarty_internal_templatecompilerbase.php
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smarty_internal_templatecompilerbase.php
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<?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
*/
/**
* Main compiler class
*/
class Smarty_Internal_TemplateCompilerBase {
// compile tag objects
static $_tag_objects = array();
// tag stack
public $_tag_stack = array();
// current template
public $template = null;
/**
* Initialize compiler
*/
public function __construct()
{
}
// abstract function doCompile($_content);
/**
* Methode to compile a Smarty template
*
* @param $template template object to compile
* @return bool true if compiling succeeded, false if it failed
*/
public function compileTemplate($template)
{
/* here is where the compiling takes place. Smarty
tags in the templates are replaces with PHP code,
then written to compiled files. */
if (!is_object($template->cacher_object)) {
$this->smarty->loadPlugin($template->cacher_class);
$template->cacher_object = new $template->cacher_class($this->smarty);
}
// flag for nochache sections
$this->nocache = false;
$this->tag_nocache = false;
// assume successfull compiling
$this->compile_error = false;
// save template object in compiler class
$this->template = $template;
$this->smarty->_current_file = $this->template->getTemplateFilepath();
// template header code
$template_header = '';
if (!$template->suppressHeader) {
$template_header .= "<?php /* Smarty version " . Smarty::$_version . ", created on " . strftime("%Y-%m-%d %H:%M:%S") . "\n";
$template_header .= " compiled from \"" . $this->template->getTemplateFilepath() . "\" */ ?>\n";
}
do {
// flag for aborting current and start recompile
$this->abort_and_recompile = false;
// get template source
$_content = $template->getTemplateSource();
// run prefilter if required
if (isset($this->smarty->autoload_filters['pre']) || isset($this->smarty->registered_filters['pre'])) {
$_content = $this->smarty->filter_handler->execute('pre', $_content);
}
// on empty template just return header
if ($_content == '') {
if ($template->suppressFileDependency) {
$template->compiled_template = '';
} else {
$template->compiled_template = $template->createPropertyHeader() . $template_header;
}
return true;
}
// init cacher plugin
$template->cacher_object->initCacher($this);
// call compiler
$_compiled_code = $this->doCompile($_content);
} while ($this->abort_and_recompile);
if (!$this->compile_error) {
// close cacher and return compiled template
if ($template->suppressFileDependency) {
$template->compiled_template = $template->cacher_object->closeCacher($this, $_compiled_code);
} else {
$template->compiled_template = $template->createPropertyHeader() . $template_header . $template->cacher_object->closeCacher($this, $_compiled_code);
}
// run postfilter if required
if (isset($this->smarty->autoload_filters['post']) || isset($this->smarty->registered_filters['post'])) {
$template->compiled_template = $this->smarty->filter_handler->execute('post', $template->compiled_template);
}
return true;
} else {
// compilation error
return false;
}
}
/**
* Compile Tag
*
* This is a call back from the lexer/parser
* It executes the required compile plugin for the Smarty tag
*
* @param string $tag tag name
* @param array $args array with tag attributes
* @return string compiled code
*/
public function compileTag($tag, $args)
{
// $args contains the attributes parsed and compiled by the lexer/parser
// assume that tag does compile into code, but creates no HTML output
$this->has_code = true;
$this->has_output = false;
// compile the smarty tag (required compile classes to compile the tag are autoloaded)
if (($_output = $this->generateCode($tag, $args)) === false) {
if (isset($this->smarty->template_functions[$tag])) {
// template defined by {template} tag
$args['name'] = $tag;
$tag = 'function_call';
$_output = $this->generateCode($tag, $args);
}
}
if ($_output !== false) {
if ($_output !== true) {
// did we get compiled code
if ($this->has_code) {
// Does it create output?
if ($this->has_output) {
$_output .= "\n";
}
// return compiled code
return $_output;
}
}
// tag did not produce compiled code
return '';
} else {
// not an internal compiler tag
// check if tag is a registered object
if (isset($this->smarty->registered_objects[$tag]) && isset($args['object_methode'])) {
$methode = $args['object_methode'];
unset ($args['object_methode']);
if (!in_array($methode, $this->smarty->registered_objects[$tag][3]) &&
(empty($this->smarty->registered_objects[$tag][1]) || in_array($methode, $this->smarty->registered_objects[$tag][1]))) {
return $this->generateCode('object_function',$args, $tag, $methode);
} elseif (in_array($methode, $this->smarty->registered_objects[$tag][3])) {
return $this->generateCode('object_block_function',$args, $tag, $methode);
} else {
return $this->trigger_template_error ('unallowed methode "' . $methode . '" in registered object "' . $tag . '"');
}
}
// check if tag is registered or is Smarty plugin
$this->smarty->plugin_handler->loadSmartyPlugin($tag, $this->smarty->plugin_search_order);
if (isset($this->smarty->registered_plugins[$tag])) {
// if compiler function plugin call it now
if ($this->smarty->registered_plugins[$tag][0] == 'compiler') {
if (!$this->smarty->registered_plugins[$tag][2]) {
$this->tag_nocache = true;
}
return call_user_func($this->smarty->registered_plugins[$tag][1], $args, $this);
}
// compile function or block plugin
$plugin_type = $this->smarty->registered_plugins[$tag][0] . '_plugin';
return $this->generateCode($plugin_type, $args, $tag);
}
// compile closing tag of block function
if (strlen($tag) > 5 && substr_compare($tag, 'close', -5, 5) == 0) {
$base_tag = substr($tag, 0, -5);
// check if closing tag is a registered object
if (isset($this->smarty->registered_objects[$base_tag]) && isset($args['object_methode'])) {
$methode = $args['object_methode'];
unset ($args['object_methode']);
if (in_array($methode, $this->smarty->registered_objects[$base_tag][3])) {
return $this->generateCode('object_block_function', $args, $tag, $methode);
} else {
return $this->trigger_template_error ('unallowed closing tag methode "' . $methode . '" in registered object "' . $base_tag . '"');
}
}
// plugin ?
if (isset($this->smarty->registered_plugins[$base_tag]) && $this->smarty->registered_plugins[$base_tag][0] == 'block') {
return $this->generateCode('block_plugin',$args, $tag);
}
}
$this->trigger_template_error ("unknown tag \"" . $tag . "\"");
}
}
/**
* lazy loads internal compile plugin for tag and calls the compile methode
*
* compile objects cached for reuse.
* class name format: Smarty_Internal_Compile_TagName
* plugin filename format: Smarty_Internal_Tagname.php
*
* @param $tag string tag name
* @param $args array with tag attributes
* @param $subtag optional tag name at plugins
* @param $method string optional method on object tags
* @return string compiled code
*/
public function generateCode($tag, $args, $subtag = null, $method = null)
{
// re-use object if already exists
if (isset(self::$_tag_objects[$tag])) {
// compile this tag
return call_user_func(array(self::$_tag_objects[$tag], 'compile'), $args, $this, $subtag, $method);
}
// lazy load internal compiler plugin
$class_name = 'Smarty_Internal_Compile_' . $tag;
if ($this->smarty->loadPlugin($class_name)) {
// use plugin if found
self::$_tag_objects[$tag] = new $class_name;
// compile this tag
return call_user_func(array(self::$_tag_objects[$tag], 'compile'), $args, $this, $subtag, $method);
}
// no internal compile plugin for this tag
return false;
}
/**
* display compiler error messages without dying
*
* If parameter $args is empty it is a parser detected syntax error.
* In this case the parser is called to obtain information about expected tokens.
*
* If parameter $args contains a string this is used as error message
*
* @todo output exact position of parse error in source line
* @param $args string individual error message or null
*/
public function trigger_template_error($args = null)
{
$this->lex = Smarty_Internal_Templatelexer::instance();
$this->parser = Smarty_Internal_Templateparser::instance();
// get template source line which has error
$line = $this->lex->line;
if (isset($args)) {
// $line--;
}
$match = preg_split("/\n/", $this->lex->data);
$error_text = 'Syntax Error in template "' . $this->template->getTemplateFilepath() . '" on line ' . $line . ' "' . $match[$line-1] . '" ';
if (isset($args)) {
// individual error message
$error_text .= $args;
} else {
// expected token from parser
foreach ($this->parser->yy_get_expected_tokens($this->parser->yymajor) as $token) {
$exp_token = $this->parser->yyTokenName[$token];
if (isset($this->lex->smarty_token_names[$exp_token])) {
// token type from lexer
$expect[] = '"' . $this->lex->smarty_token_names[$exp_token] . '"';
} else {
// otherwise internal token name
$expect[] = $this->parser->yyTokenName[$token];
}
}
// output parser error message
$error_text .= ' - Unexpected "' . $this->lex->value . '", expected one of: ' . implode(' , ', $expect);
}
echo '<br class="clear" /><pre>';
throw new Exception("<pre>$error_text</pre>");
// set error flag
$this->compile_error = true;
}
}
?>

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