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<?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. */ namespace WPML\Core\Twig\TokenParser; use WPML\Core\Twig\Error\SyntaxError; use WPML\Core\Twig\Node\Expression\AssignNameExpression; use WPML\Core\Twig\Node\Expression\ConstantExpression; use WPML\Core\Twig\Node\Expression\GetAttrExpression; use WPML\Core\Twig\Node\Expression\NameExpression; use WPML\Core\Twig\Node\ForNode; use WPML\Core\Twig\Token; use WPML\Core\Twig\TokenStream; /** * Loops over each item of a sequence. * * <ul> * {% for user in users %} * <li>{{ user.username|e }}</li> * {% endfor %} * </ul> * * @final */ class ForTokenParser extends \WPML\Core\Twig\TokenParser\AbstractTokenParser { public function parse(\WPML\Core\Twig\Token $token) { $lineno = $token->getLine(); $stream = $this->parser->getStream(); $targets = $this->parser->getExpressionParser()->parseAssignmentExpression(); $stream->expect(\WPML\Core\Twig\Token::OPERATOR_TYPE, 'in'); $seq = $this->parser->getExpressionParser()->parseExpression(); $ifexpr = null; if ($stream->nextIf(\WPML\Core\Twig\Token::NAME_TYPE, 'if')) { $ifexpr = $this->parser->getExpressionParser()->parseExpression(); } $stream->expect(\WPML\Core\Twig\Token::BLOCK_END_TYPE); $body = $this->parser->subparse([$this, 'decideForFork']); if ('else' == $stream->next()->getValue()) { $stream->expect(\WPML\Core\Twig\Token::BLOCK_END_TYPE); $else = $this->parser->subparse([$this, 'decideForEnd'], \true); } else { $else = null; } $stream->expect(\WPML\Core\Twig\Token::BLOCK_END_TYPE); if (\count($targets) > 1) { $keyTarget = $targets->getNode(0); $keyTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression($keyTarget->getAttribute('name'), $keyTarget->getTemplateLine()); $valueTarget = $targets->getNode(1); $valueTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression($valueTarget->getAttribute('name'), $valueTarget->getTemplateLine()); } else { $keyTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression('_key', $lineno); $valueTarget = $targets->getNode(0); $valueTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression($valueTarget->getAttribute('name'), $valueTarget->getTemplateLine()); } if ($ifexpr) { $this->checkLoopUsageCondition($stream, $ifexpr); $this->checkLoopUsageBody($stream, $body); } return new \WPML\Core\Twig\Node\ForNode($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, $lineno, $this->getTag()); } public function decideForFork(\WPML\Core\Twig\Token $token) { return $token->test(['else', 'endfor']); } public function decideForEnd(\WPML\Core\Twig\Token $token) { return $token->test('endfor'); } // the loop variable cannot be used in the condition protected function checkLoopUsageCondition(\WPML\Core\Twig\TokenStream $stream, \WPML\Core\Twig_NodeInterface $node) { if ($node instanceof \WPML\Core\Twig\Node\Expression\GetAttrExpression && $node->getNode('node') instanceof \WPML\Core\Twig\Node\Expression\NameExpression && 'loop' == $node->getNode('node')->getAttribute('name')) { throw new \WPML\Core\Twig\Error\SyntaxError('The "loop" variable cannot be used in a looping condition.', $node->getTemplateLine(), $stream->getSourceContext()); } foreach ($node as $n) { if (!$n) { continue; } $this->checkLoopUsageCondition($stream, $n); } } // check usage of non-defined loop-items // it does not catch all problems (for instance when a for is included into another or when the variable is used in an include) protected function checkLoopUsageBody(\WPML\Core\Twig\TokenStream $stream, \WPML\Core\Twig_NodeInterface $node) { if ($node instanceof \WPML\Core\Twig\Node\Expression\GetAttrExpression && $node->getNode('node') instanceof \WPML\Core\Twig\Node\Expression\NameExpression && 'loop' == $node->getNode('node')->getAttribute('name')) { $attribute = $node->getNode('attribute'); if ($attribute instanceof \WPML\Core\Twig\Node\Expression\ConstantExpression && \in_array($attribute->getAttribute('value'), ['length', 'revindex0', 'revindex', 'last'])) { throw new \WPML\Core\Twig\Error\SyntaxError(\sprintf('The "loop.%s" variable is not defined when looping with a condition.', $attribute->getAttribute('value')), $node->getTemplateLine(), $stream->getSourceContext()); } } // should check for parent.loop.XXX usage if ($node instanceof \WPML\Core\Twig\Node\ForNode) { return; } foreach ($node as $n) { if (!$n) { continue; } $this->checkLoopUsageBody($stream, $n); } } public function getTag() { return 'for'; } } \class_alias('WPML\\Core\\Twig\\TokenParser\\ForTokenParser', 'WPML\\Core\\Twig_TokenParser_For');
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