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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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* (c) 2009 Armin Ronacher
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Represents a for node.
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*
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* @package twig
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Twig_Node_For extends Twig_Node
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{
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protected $loop;
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public function __construct(Twig_Node_Expression_AssignName $keyTarget, Twig_Node_Expression_AssignName $valueTarget, Twig_Node_Expression $seq, Twig_Node_Expression $ifexpr = null, Twig_NodeInterface $body, Twig_NodeInterface $else = null, $lineno, $tag = null)
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{
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$body = new Twig_Node(array($body, $this->loop = new Twig_Node_ForLoop($lineno, $tag)));
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if (null !== $ifexpr) {
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$body = new Twig_Node_If(new Twig_Node(array($ifexpr, $body)), null, $lineno, $tag);
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}
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parent::__construct(array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body, 'else' => $else), array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
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}
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/**
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* Compiles the node to PHP.
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*
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* @param Twig_Compiler A Twig_Compiler instance
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*/
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public function compile(Twig_Compiler $compiler)
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{
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$compiler
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->addDebugInfo($this)
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// the (array) cast bypasses a PHP 5.2.6 bug
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->write("\$context['_parent'] = (array) \$context;\n")
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->write("\$context['_seq'] = twig_ensure_traversable(")
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->subcompile($this->getNode('seq'))
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->raw(");\n")
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;
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if (null !== $this->getNode('else')) {
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$compiler->write("\$context['_iterated'] = false;\n");
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}
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if ($this->getAttribute('with_loop')) {
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$compiler
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->write("\$context['loop'] = array(\n")
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->write(" 'parent' => \$context['_parent'],\n")
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->write(" 'index0' => 0,\n")
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->write(" 'index' => 1,\n")
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->write(" 'first' => true,\n")
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->write(");\n")
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;
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if (!$this->getAttribute('ifexpr')) {
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$compiler
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->write("if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {\n")
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->indent()
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->write("\$length = count(\$context['_seq']);\n")
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->write("\$context['loop']['revindex0'] = \$length - 1;\n")
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->write("\$context['loop']['revindex'] = \$length;\n")
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->write("\$context['loop']['length'] = \$length;\n")
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->write("\$context['loop']['last'] = 1 === \$length;\n")
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->outdent()
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->write("}\n")
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;
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}
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}
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$this->loop->setAttribute('else', null !== $this->getNode('else'));
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$this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
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$this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));
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$compiler
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->write("foreach (\$context['_seq'] as ")
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->subcompile($this->getNode('key_target'))
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->raw(" => ")
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->subcompile($this->getNode('value_target'))
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->raw(") {\n")
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->indent()
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->subcompile($this->getNode('body'))
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->outdent()
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->write("}\n")
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;
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if (null !== $this->getNode('else')) {
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$compiler
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->write("if (!\$context['_iterated']) {\n")
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->indent()
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->subcompile($this->getNode('else'))
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->outdent()
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->write("}\n")
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;
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}
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$compiler->write("\$_parent = \$context['_parent'];\n");
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// remove some "private" loop variables (needed for nested loops)
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$compiler->write('unset($context[\'_seq\'], $context[\'_iterated\'], $context[\''.$this->getNode('key_target')->getAttribute('name').'\'], $context[\''.$this->getNode('value_target')->getAttribute('name').'\'], $context[\'_parent\'], $context[\'loop\']);'."\n");
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// keep the values set in the inner context for variables defined in the outer context
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$compiler->write("\$context = array_merge(\$_parent, array_intersect_key(\$context, \$_parent));\n");
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}
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}
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