335 lines
9.5 KiB
PHP
335 lines
9.5 KiB
PHP
|
<?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.
|
||
|
|
*
|
||
|
|
* @package twig
|
||
|
|
* @author Fabien Potencier <fabien@symfony.com>
|
||
|
|
*/
|
||
|
|
class Twig_Parser implements Twig_ParserInterface
|
||
|
|
{
|
||
|
|
protected $stream;
|
||
|
|
protected $parent;
|
||
|
|
protected $handlers;
|
||
|
|
protected $visitors;
|
||
|
|
protected $expressionParser;
|
||
|
|
protected $blocks;
|
||
|
|
protected $blockStack;
|
||
|
|
protected $macros;
|
||
|
|
protected $env;
|
||
|
|
protected $reservedMacroNames;
|
||
|
|
protected $importedFunctions;
|
||
|
|
protected $tmpVarCount;
|
||
|
|
protected $traits;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Constructor.
|
||
|
|
*
|
||
|
|
* @param Twig_Environment $env A Twig_Environment instance
|
||
|
|
*/
|
||
|
|
public function __construct(Twig_Environment $env)
|
||
|
|
{
|
||
|
|
$this->env = $env;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getVarName()
|
||
|
|
{
|
||
|
|
return sprintf('__internal_%s_%d', substr($this->env->getTemplateClass($this->stream->getFilename()), strlen($this->env->getTemplateClassPrefix())), ++$this->tmpVarCount);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts a token stream to a node tree.
|
||
|
|
*
|
||
|
|
* @param Twig_TokenStream $stream A token stream instance
|
||
|
|
*
|
||
|
|
* @return Twig_Node_Module A node tree
|
||
|
|
*/
|
||
|
|
public function parse(Twig_TokenStream $stream)
|
||
|
|
{
|
||
|
|
$this->tmpVarCount = 0;
|
||
|
|
|
||
|
|
// tag handlers
|
||
|
|
$this->handlers = $this->env->getTokenParsers();
|
||
|
|
$this->handlers->setParser($this);
|
||
|
|
|
||
|
|
// node 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->importedFunctions = array(array());
|
||
|
|
|
||
|
|
try {
|
||
|
|
$body = $this->subparse(null);
|
||
|
|
|
||
|
|
if (null !== $this->parent) {
|
||
|
|
if (null === $body = $this->filterBodyNodes($body)) {
|
||
|
|
$body = new Twig_Node();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} catch (Twig_Error_Syntax $e) {
|
||
|
|
if (null === $e->getTemplateFile()) {
|
||
|
|
$e->setTemplateFile($this->stream->getFilename());
|
||
|
|
}
|
||
|
|
|
||
|
|
throw $e;
|
||
|
|
}
|
||
|
|
|
||
|
|
$node = new Twig_Node_Module($body, $this->parent, new Twig_Node($this->blocks), new Twig_Node($this->macros), new Twig_Node($this->traits), $this->stream->getFilename());
|
||
|
|
|
||
|
|
$traverser = new Twig_NodeTraverser($this->env, $this->visitors);
|
||
|
|
|
||
|
|
return $traverser->traverse($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->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) {
|
||
|
|
throw new Twig_Error_Syntax(sprintf('Unexpected tag name "%s" (expecting closing tag for the "%s" tag defined near line %s)', $token->getValue(), $test[0]->getTag(), $lineno), $token->getLine(), $this->stream->getFilename());
|
||
|
|
}
|
||
|
|
|
||
|
|
throw new Twig_Error_Syntax(sprintf('Unknown tag name "%s"', $token->getValue()), $token->getLine(), $this->stream->getFilename());
|
||
|
|
}
|
||
|
|
|
||
|
|
$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.', -1, $this->stream->getFilename());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (1 === count($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 setBlock($name, $value)
|
||
|
|
{
|
||
|
|
$this->blocks[$name] = $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function hasMacro($name)
|
||
|
|
{
|
||
|
|
return isset($this->macros[$name]);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function setMacro($name, Twig_Node_Macro $node)
|
||
|
|
{
|
||
|
|
if (null === $this->reservedMacroNames) {
|
||
|
|
$this->reservedMacroNames = array();
|
||
|
|
$r = new ReflectionClass($this->env->getBaseTemplateClass());
|
||
|
|
foreach ($r->getMethods() as $method) {
|
||
|
|
$this->reservedMacroNames[] = $method->getName();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (in_array($name, $this->reservedMacroNames)) {
|
||
|
|
throw new Twig_Error_Syntax(sprintf('"%s" cannot be used as a macro name as it is a reserved keyword', $name), $node->getLine());
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->macros[$name] = $node;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function addTrait($trait)
|
||
|
|
{
|
||
|
|
$this->traits[] = $trait;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function addImportedFunction($alias, $name, Twig_Node_Expression $node)
|
||
|
|
{
|
||
|
|
$this->importedFunctions[0][$alias] = array('name' => $name, 'node' => $node);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getImportedFunction($alias)
|
||
|
|
{
|
||
|
|
foreach ($this->importedFunctions as $functions) {
|
||
|
|
if (isset($functions[$alias])) {
|
||
|
|
return $functions[$alias];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public function isMainScope()
|
||
|
|
{
|
||
|
|
return 1 === count($this->importedFunctions);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function pushLocalScope()
|
||
|
|
{
|
||
|
|
array_unshift($this->importedFunctions, array());
|
||
|
|
}
|
||
|
|
|
||
|
|
public function popLocalScope()
|
||
|
|
{
|
||
|
|
array_shift($this->importedFunctions);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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)
|
||
|
|
) {
|
||
|
|
throw new Twig_Error_Syntax('A template that extends another one cannot have a body.', $node->getLine(), $this->stream->getFilename());
|
||
|
|
}
|
||
|
|
|
||
|
|
// bypass "set" nodes as they "capture" the output
|
||
|
|
if ($node instanceof Twig_Node_Set) {
|
||
|
|
return $node;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($node instanceof Twig_NodeOutputInterface) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ($node as $k => $n) {
|
||
|
|
if (null !== $n && null === $n = $this->filterBodyNodes($n)) {
|
||
|
|
$node->removeNode($k);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $node;
|
||
|
|
}
|
||
|
|
}
|