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