shop.balmet.com

Parser.php (12410B)

---

 <?php
 
 /*
  * This file is part of Twig.
  *
  * (c) 2009 Fabien Potencier
  * (c) 2009 Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
 /**
  * Default parser implementation.
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
 class Twig_Parser implements Twig_ParserInterface
 {
     protected $stack = array();
     protected $stream;
     protected $parent;
     protected $handlers;
     protected $visitors;
     protected $expressionParser;
     protected $blocks;
     protected $blockStack;
     protected $macros;
     protected $env;
     protected $reservedMacroNames;
     protected $importedSymbols;
     protected $traits;
     protected $embeddedTemplates = array();
 
     /**
      * Constructor.
      *
      * @param Twig_Environment $env A Twig_Environment instance
      */
     public function __construct(Twig_Environment $env)
     {
         $this->env = $env;
     }
 
     public function getEnvironment()
     {
         return $this->env;
     }
 
     public function getVarName()
     {
         return sprintf('__internal_%s', hash('sha256', uniqid(mt_rand(), true), false));
     }
 
     public function getFilename()
     {
         return $this->stream->getFilename();
     }
 
     /**
      * {@inheritdoc}
      */
     public function parse(Twig_TokenStream $stream, $test = null, $dropNeedle = false)
     {
         // push all variables into the stack to keep the current state of the parser
         // using get_object_vars() instead of foreach would lead to https://bugs.php.net/71336
         $vars = array();
         foreach ($this as $k => $v) {
             $vars[$k] = $v;
         }
 
         unset($vars['stack'], $vars['env'], $vars['handlers'], $vars['visitors'], $vars['expressionParser'], $vars['reservedMacroNames']);
         $this->stack[] = $vars;
 
         // tag handlers
         if (null === $this->handlers) {
             $this->handlers = $this->env->getTokenParsers();
             $this->handlers->setParser($this);
         }
 
         // node visitors
         if (null === $this->visitors) {
             $this->visitors = $this->env->getNodeVisitors();
         }
 
         if (null === $this->expressionParser) {
             $this->expressionParser = new Twig_ExpressionParser($this, $this->env->getUnaryOperators(), $this->env->getBinaryOperators());
         }
 
         $this->stream = $stream;
         $this->parent = null;
         $this->blocks = array();
         $this->macros = array();
         $this->traits = array();
         $this->blockStack = array();
         $this->importedSymbols = array(array());
         $this->embeddedTemplates = array();
 
         try {
             $body = $this->subparse($test, $dropNeedle);
 
             if (null !== $this->parent && null === $body = $this->filterBodyNodes($body)) {
                 $body = new Twig_Node();
             }
         } catch (Twig_Error_Syntax $e) {
             if (!$e->getTemplateFile()) {
                 $e->setTemplateFile($this->getFilename());
             }
 
             if (!$e->getTemplateLine()) {
                 $e->setTemplateLine($this->stream->getCurrent()->getLine());
             }
 
             throw $e;
         }
 
         $node = new Twig_Node_Module(new Twig_Node_Body(array($body)), $this->parent, new Twig_Node($this->blocks), new Twig_Node($this->macros), new Twig_Node($this->traits), $this->embeddedTemplates, $this->getFilename());
 
         $traverser = new Twig_NodeTraverser($this->env, $this->visitors);
 
         $node = $traverser->traverse($node);
 
         // restore previous stack so previous parse() call can resume working
         foreach (array_pop($this->stack) as $key => $val) {
             $this->$key = $val;
         }
 
         return $node;
     }
 
     public function subparse($test, $dropNeedle = false)
     {
         $lineno = $this->getCurrentToken()->getLine();
         $rv = array();
         while (!$this->stream->isEOF()) {
             switch ($this->getCurrentToken()->getType()) {
                 case Twig_Token::TEXT_TYPE:
                     $token = $this->stream->next();
                     $rv[] = new Twig_Node_Text($token->getValue(), $token->getLine());
                     break;
 
                 case Twig_Token::VAR_START_TYPE:
                     $token = $this->stream->next();
                     $expr = $this->expressionParser->parseExpression();
                     $this->stream->expect(Twig_Token::VAR_END_TYPE);
                     $rv[] = new Twig_Node_Print($expr, $token->getLine());
                     break;
 
                 case Twig_Token::BLOCK_START_TYPE:
                     $this->stream->next();
                     $token = $this->getCurrentToken();
 
                     if ($token->getType() !== Twig_Token::NAME_TYPE) {
                         throw new Twig_Error_Syntax('A block must start with a tag name.', $token->getLine(), $this->getFilename());
                     }
 
                     if (null !== $test && call_user_func($test, $token)) {
                         if ($dropNeedle) {
                             $this->stream->next();
                         }
 
                         if (1 === count($rv)) {
                             return $rv[0];
                         }
 
                         return new Twig_Node($rv, array(), $lineno);
                     }
 
                     $subparser = $this->handlers->getTokenParser($token->getValue());
                     if (null === $subparser) {
                         if (null !== $test) {
                             $e = new Twig_Error_Syntax(sprintf('Unexpected "%s" tag', $token->getValue()), $token->getLine(), $this->getFilename());
 
                             if (is_array($test) && isset($test[0]) && $test[0] instanceof Twig_TokenParserInterface) {
                                 $e->appendMessage(sprintf(' (expecting closing tag for the "%s" tag defined near line %s).', $test[0]->getTag(), $lineno));
                             }
                         } else {
                             $e = new Twig_Error_Syntax(sprintf('Unknown "%s" tag.', $token->getValue()), $token->getLine(), $this->getFilename());
                             $e->addSuggestions($token->getValue(), array_keys($this->env->getTags()));
                         }
 
                         throw $e;
                     }
 
                     $this->stream->next();
 
                     $node = $subparser->parse($token);
                     if (null !== $node) {
                         $rv[] = $node;
                     }
                     break;
 
                 default:
                     throw new Twig_Error_Syntax('Lexer or parser ended up in unsupported state.', 0, $this->getFilename());
             }
         }
 
         if (1 === count($rv)) {
             return $rv[0];
         }
 
         return new Twig_Node($rv, array(), $lineno);
     }
 
     public function addHandler($name, $class)
     {
         $this->handlers[$name] = $class;
     }
 
     public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
     {
         $this->visitors[] = $visitor;
     }
 
     public function getBlockStack()
     {
         return $this->blockStack;
     }
 
     public function peekBlockStack()
     {
         return $this->blockStack[count($this->blockStack) - 1];
     }
 
     public function popBlockStack()
     {
         array_pop($this->blockStack);
     }
 
     public function pushBlockStack($name)
     {
         $this->blockStack[] = $name;
     }
 
     public function hasBlock($name)
     {
         return isset($this->blocks[$name]);
     }
 
     public function getBlock($name)
     {
         return $this->blocks[$name];
     }
 
     public function setBlock($name, Twig_Node_Block $value)
     {
         $this->blocks[$name] = new Twig_Node_Body(array($value), array(), $value->getLine());
     }
 
     public function hasMacro($name)
     {
         return isset($this->macros[$name]);
     }
 
     public function setMacro($name, Twig_Node_Macro $node)
     {
         if ($this->isReservedMacroName($name)) {
             throw new Twig_Error_Syntax(sprintf('"%s" cannot be used as a macro name as it is a reserved keyword.', $name), $node->getLine(), $this->getFilename());
         }
 
         $this->macros[$name] = $node;
     }
 
     public function isReservedMacroName($name)
     {
         if (null === $this->reservedMacroNames) {
             $this->reservedMacroNames = array();
             $r = new ReflectionClass($this->env->getBaseTemplateClass());
             foreach ($r->getMethods() as $method) {
                 $methodName = strtolower($method->getName());
 
                 if ('get' === substr($methodName, 0, 3) && isset($methodName[3])) {
                     $this->reservedMacroNames[] = substr($methodName, 3);
                 }
             }
         }
 
         return in_array(strtolower($name), $this->reservedMacroNames);
     }
 
     public function addTrait($trait)
     {
         $this->traits[] = $trait;
     }
 
     public function hasTraits()
     {
         return count($this->traits) > 0;
     }
 
     public function embedTemplate(Twig_Node_Module $template)
     {
         $template->setIndex(mt_rand());
 
         $this->embeddedTemplates[] = $template;
     }
 
     public function addImportedSymbol($type, $alias, $name = null, Twig_Node_Expression $node = null)
     {
         $this->importedSymbols[0][$type][$alias] = array('name' => $name, 'node' => $node);
     }
 
     public function getImportedSymbol($type, $alias)
     {
         foreach ($this->importedSymbols as $functions) {
             if (isset($functions[$type][$alias])) {
                 return $functions[$type][$alias];
             }
         }
     }
 
     public function isMainScope()
     {
         return 1 === count($this->importedSymbols);
     }
 
     public function pushLocalScope()
     {
         array_unshift($this->importedSymbols, array());
     }
 
     public function popLocalScope()
     {
         array_shift($this->importedSymbols);
     }
 
     /**
      * Gets the expression parser.
      *
      * @return Twig_ExpressionParser The expression parser
      */
     public function getExpressionParser()
     {
         return $this->expressionParser;
     }
 
     public function getParent()
     {
         return $this->parent;
     }
 
     public function setParent($parent)
     {
         $this->parent = $parent;
     }
 
     /**
      * Gets the token stream.
      *
      * @return Twig_TokenStream The token stream
      */
     public function getStream()
     {
         return $this->stream;
     }
 
     /**
      * Gets the current token.
      *
      * @return Twig_Token The current token
      */
     public function getCurrentToken()
     {
         return $this->stream->getCurrent();
     }
 
     protected function filterBodyNodes(Twig_NodeInterface $node)
     {
         // check that the body does not contain non-empty output nodes
         if (
             ($node instanceof Twig_Node_Text && !ctype_space($node->getAttribute('data')))
             ||
             (!$node instanceof Twig_Node_Text && !$node instanceof Twig_Node_BlockReference && $node instanceof Twig_NodeOutputInterface)
         ) {
             if (false !== strpos((string) $node, chr(0xEF).chr(0xBB).chr(0xBF))) {
                 throw new Twig_Error_Syntax('A template that extends another one cannot have a body but a byte order mark (BOM) has been detected; it must be removed.', $node->getLine(), $this->getFilename());
             }
 
             throw new Twig_Error_Syntax('A template that extends another one cannot have a body.', $node->getLine(), $this->getFilename());
         }
 
         // bypass "set" nodes as they "capture" the output
         if ($node instanceof Twig_Node_Set) {
             return $node;
         }
 
         if ($node instanceof Twig_NodeOutputInterface) {
             return;
         }
 
         foreach ($node as $k => $n) {
             if (null !== $n && null === $this->filterBodyNodes($n)) {
                 $node->removeNode($k);
             }
         }
 
         return $node;
     }
 }