| <?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 Twig\Node; |
| |
| use Twig\Compiler; |
| use Twig\Node\Expression\AbstractExpression; |
| use Twig\Node\Expression\AssignNameExpression; |
| |
| /** |
| * Represents a for node. |
| * |
| * @author Fabien Potencier <fabien@symfony.com> |
| */ |
| class ForNode extends Node |
| { |
| private $loop; |
| |
| public function __construct(AssignNameExpression $keyTarget, AssignNameExpression $valueTarget, AbstractExpression $seq, ?Node $ifexpr, Node $body, ?Node $else, int $lineno, string $tag = null) |
| { |
| $body = new Node([$body, $this->loop = new ForLoopNode($lineno, $tag)]); |
| |
| $nodes = ['key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body]; |
| if (null !== $else) { |
| $nodes['else'] = $else; |
| } |
| |
| parent::__construct($nodes, ['with_loop' => true], $lineno, $tag); |
| } |
| |
| public function compile(Compiler $compiler): void |
| { |
| $compiler |
| ->addDebugInfo($this) |
| ->write("\$context['_parent'] = \$context;\n") |
| ->write("\$context['_seq'] = twig_ensure_traversable(") |
| ->subcompile($this->getNode('seq')) |
| ->raw(");\n") |
| ; |
| |
| if ($this->hasNode('else')) { |
| $compiler->write("\$context['_iterated'] = false;\n"); |
| } |
| |
| if ($this->getAttribute('with_loop')) { |
| $compiler |
| ->write("\$context['loop'] = [\n") |
| ->write(" 'parent' => \$context['_parent'],\n") |
| ->write(" 'index0' => 0,\n") |
| ->write(" 'index' => 1,\n") |
| ->write(" 'first' => true,\n") |
| ->write("];\n") |
| ->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', $this->hasNode('else')); |
| $this->loop->setAttribute('with_loop', $this->getAttribute('with_loop')); |
| |
| $compiler |
| ->write("foreach (\$context['_seq'] as ") |
| ->subcompile($this->getNode('key_target')) |
| ->raw(' => ') |
| ->subcompile($this->getNode('value_target')) |
| ->raw(") {\n") |
| ->indent() |
| ->subcompile($this->getNode('body')) |
| ->outdent() |
| ->write("}\n") |
| ; |
| |
| if ($this->hasNode('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"); |
| } |
| } |