4 * This file is part of Twig.
9 * For the full copyright and license information, please view the LICENSE
10 * file that was distributed with this source code.
14 * Represents a for node.
16 * @author Fabien Potencier <fabien@symfony.com>
18 class Twig_Node_For extends Twig_Node
22 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)
24 $body = new Twig_Node(array($body, $this->loop = new Twig_Node_ForLoop($lineno, $tag)));
26 if (null !== $ifexpr) {
27 $body = new Twig_Node_If(new Twig_Node(array($ifexpr, $body)), null, $lineno, $tag);
30 $nodes = array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body);
32 $nodes['else'] = $else;
35 parent::__construct($nodes, array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
38 public function compile(Twig_Compiler $compiler)
42 ->write("\$context['_parent'] = \$context;\n")
43 ->write("\$context['_seq'] = twig_ensure_traversable(")
44 ->subcompile($this->getNode('seq'))
48 if ($this->hasNode('else')) {
49 $compiler->write("\$context['_iterated'] = false;\n");
52 if ($this->getAttribute('with_loop')) {
54 ->write("\$context['loop'] = array(\n")
55 ->write(" 'parent' => \$context['_parent'],\n")
56 ->write(" 'index0' => 0,\n")
57 ->write(" 'index' => 1,\n")
58 ->write(" 'first' => true,\n")
62 if (!$this->getAttribute('ifexpr')) {
64 ->write("if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {\n")
66 ->write("\$length = count(\$context['_seq']);\n")
67 ->write("\$context['loop']['revindex0'] = \$length - 1;\n")
68 ->write("\$context['loop']['revindex'] = \$length;\n")
69 ->write("\$context['loop']['length'] = \$length;\n")
70 ->write("\$context['loop']['last'] = 1 === \$length;\n")
77 $this->loop->setAttribute('else', $this->hasNode('else'));
78 $this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
79 $this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));
82 ->write("foreach (\$context['_seq'] as ")
83 ->subcompile($this->getNode('key_target'))
85 ->subcompile($this->getNode('value_target'))
88 ->subcompile($this->getNode('body'))
93 if ($this->hasNode('else')) {
95 ->write("if (!\$context['_iterated']) {\n")
97 ->subcompile($this->getNode('else'))
103 $compiler->write("\$_parent = \$context['_parent'];\n");
105 // remove some "private" loop variables (needed for nested loops)
106 $compiler->write('unset($context[\'_seq\'], $context[\'_iterated\'], $context[\''.$this->getNode('key_target')->getAttribute('name').'\'], $context[\''.$this->getNode('value_target')->getAttribute('name').'\'], $context[\'_parent\'], $context[\'loop\']);'."\n");
108 // keep the values set in the inner context for variables defined in the outer context
109 $compiler->write("\$context = array_intersect_key(\$context, \$_parent) + \$_parent;\n");
113 class_alias('Twig_Node_For', 'Twig\Node\ForNode', false);