--- /dev/null
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ * (c) 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();
+
+ public function __construct(Twig_Environment $env)
+ {
+ $this->env = $env;
+ }
+
+ /**
+ * @deprecated since 1.27 (to be removed in 2.0)
+ */
+ public function getEnvironment()
+ {
+ @trigger_error('The '.__METHOD__.' method is deprecated since version 1.27 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+ return $this->env;
+ }
+
+ public function getVarName()
+ {
+ return sprintf('__internal_%s', hash('sha256', uniqid(mt_rand(), true), false));
+ }
+
+ /**
+ * @deprecated since 1.27 (to be removed in 2.0). Use $parser->getStream()->getSourceContext()->getPath() instead.
+ */
+ public function getFilename()
+ {
+ @trigger_error(sprintf('The "%s" method is deprecated since version 1.27 and will be removed in 2.0. Use $parser->getStream()->getSourceContext()->getPath() instead.', __METHOD__), E_USER_DEPRECATED);
+
+ return $this->stream->getSourceContext()->getName();
+ }
+
+ 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
+ // This hack can be removed when min version if PHP 7.0
+ $vars = array();
+ foreach ($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);
+ }
+
+ $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->getSourceContext()) {
+ $e->setSourceContext($this->stream->getSourceContext());
+ }
+
+ 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, $stream->getSourceContext());
+
+ $traverser = new Twig_NodeTraverser($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->stream->getSourceContext());
+ }
+
+ 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(), $this->stream->getSourceContext());
+
+ if (is_array($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->stream->getSourceContext());
+ $e->addSuggestions($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.', $this->getCurrentToken()->getLine(), $this->stream->getSourceContext());
+ }
+ }
+
+ if (1 === count($rv)) {
+ return $rv[0];
+ }
+
+ return new Twig_Node($rv, array(), $lineno);
+ }
+
+ /**
+ * @deprecated since 1.27 (to be removed in 2.0)
+ */
+ public function addHandler($name, $class)
+ {
+ @trigger_error('The '.__METHOD__.' method is deprecated since version 1.27 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+ $this->handlers[$name] = $class;
+ }
+
+ /**
+ * @deprecated since 1.27 (to be removed in 2.0)
+ */
+ public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
+ {
+ @trigger_error('The '.__METHOD__.' method is deprecated since version 1.27 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+ $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(), $value->getTemplateLine());
+ }
+
+ public function hasMacro($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->getTemplateLine(), $this->stream->getSourceContext());
+ }
+
+ $this->macros[$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);
+ }
+
+ /**
+ * @return Twig_ExpressionParser
+ */
+ public function getExpressionParser()
+ {
+ return $this->expressionParser;
+ }
+
+ public function getParent()
+ {
+ return $this->parent;
+ }
+
+ public function setParent($parent)
+ {
+ $this->parent = $parent;
+ }
+
+ /**
+ * @return Twig_TokenStream
+ */
+ public function getStream()
+ {
+ return $this->stream;
+ }
+
+ /**
+ * @return Twig_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 start with a byte order mark (BOM); it must be removed.', $node->getTemplateLine(), $this->stream->getSourceContext());
+ }
+
+ throw new Twig_Error_Syntax('A template that extends another one cannot include contents outside Twig blocks. Did you forget to put the contents inside a {% block %} tag?', $node->getTemplateLine(), $this->stream->getSourceContext());
+ }
+
+ // bypass nodes that will "capture" the output
+ if ($node instanceof Twig_NodeCaptureInterface) {
+ 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;
+ }
+}
projects / yaffs-website / blobdiff