110 lines
3.8 KiB
PHP
110 lines
3.8 KiB
PHP
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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) Fabien Potencier
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* (c) 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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namespace Twig\Node;
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use Twig\Attribute\YieldReady;
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use Twig\Compiler;
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use Twig\Node\Expression\AbstractExpression;
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use Twig\Node\Expression\AssignNameExpression;
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/**
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* Represents a for node.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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#[YieldReady]
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class ForNode extends Node
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{
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private $loop;
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public function __construct(AssignNameExpression $keyTarget, AssignNameExpression $valueTarget, AbstractExpression $seq, ?Node $ifexpr, Node $body, ?Node $else, int $lineno, ?string $tag = null)
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{
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$body = new Node([$body, $this->loop = new ForLoopNode($lineno, $tag)]);
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$nodes = ['key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body];
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if (null !== $else) {
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$nodes['else'] = $else;
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}
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parent::__construct($nodes, ['with_loop' => true], $lineno, $tag);
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}
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public function compile(Compiler $compiler): void
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{
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$compiler
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->addDebugInfo($this)
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->write("\$context['_parent'] = \$context;\n")
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->write("\$context['_seq'] = CoreExtension::ensureTraversable(")
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->subcompile($this->getNode('seq'))
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->raw(");\n")
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;
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if ($this->hasNode('else')) {
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$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'] = [\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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->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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$this->loop->setAttribute('else', $this->hasNode('else'));
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$this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
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$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($this->getNode('body'))
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->outdent()
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->write("}\n")
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;
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if ($this->hasNode('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_intersect_key(\$context, \$_parent) + \$_parent;\n");
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}
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}
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