<?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.
*/
/**
* Represents a for node.
*
* @author Fabien Potencier <[email protected]>
*/
class Twig_Node_For extends Twig_Node
{
protected $loop;
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)
{
$body = new Twig_Node(array($body, $this->loop = new Twig_Node_ForLoop($lineno, $tag)));
if (null !== $ifexpr) {
$body = new Twig_Node_If(new Twig_Node(array($ifexpr, $body)), null, $lineno, $tag);
}
parent::__construct(array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body, 'else' => $else), array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
}
/**
* Compiles the node to PHP.
*
* @param Twig_Compiler A Twig_Compiler instance
*/
public function compile(Twig_Compiler $compiler)
{
$compiler
->addDebugInfo($this)
// the (array) cast bypasses a PHP 5.2.6 bug
->write("\$context['_parent'] = (array) \$context;\n")
->write("\$context['_seq'] = twig_ensure_traversable(")
->subcompile($this->getNode('seq'))
->raw(");\n")
;
if (null !== $this->getNode('else')) {
$compiler->write("\$context['_iterated'] = false;\n");
}
if ($this->getAttribute('with_loop')) {
$compiler
->write("\$context['loop'] = array(\n")
->write(" 'parent' => \$context['_parent'],\n")
->write(" 'index0' => 0,\n")
->write(" 'index' => 1,\n")
->write(" 'first' => true,\n")
->write(");\n")
;
if (!$this->getAttribute('ifexpr')) {
$compiler
->write("if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {\n")
->indent()
->write("\$length = count(\$context['_seq']);\n")
->write("\$context['loop']['revindex0'] = \$length - 1;\n")
->write("\$context['loop']['revindex'] = \$length;\n")
->write("\$context['loop']['length'] = \$length;\n")
->write("\$context['loop']['last'] = 1 === \$length;\n")
->outdent()
->write("}\n")
;
}
}
$this->loop->setAttribute('else', null !== $this->getNode('else'));
$this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
$this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));
$compiler
->write("foreach (\$context['_seq'] as ")
->subcompile($this->getNode('key_target'))
->raw(" => ")
->subcompile($this->getNode('value_target'))
->raw(") {\n")
->indent()
->subcompile($this->getNode('body'))
->outdent()
->write("}\n")
;
if (null !== $this->getNode('else')) {
$compiler
->write("if (!\$context['_iterated']) {\n")
->indent()
->subcompile($this->getNode('else'))
->outdent()
->write("}\n")
;
}
$compiler->write("\$_parent = \$context['_parent'];\n");
// remove some "private" loop variables (needed for nested loops)
$compiler->write('unset($context[\'_seq\'], $context[\'_iterated\'], $context[\''.$this->getNode('key_target')->getAttribute('name').'\'], $context[\''.$this->getNode('value_target')->getAttribute('name').'\'], $context[\'_parent\'], $context[\'loop\']);'."\n");
// keep the values set in the inner context for variables defined in the outer context
$compiler->write("\$context = array_intersect_key(\$context, \$_parent) + \$_parent;\n");
}
}