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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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/*
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 * This file is part of Psy Shell.
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 *
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 * (c) 2012-2023 Justin Hileman
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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 Psy\CodeCleaner;
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use PhpParser\Node;
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use PhpParser\Node\Name;
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use PhpParser\Node\Stmt\Namespace_;
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use Psy\CodeCleaner;
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/**
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 * Provide implicit namespaces for subsequent execution.
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 *
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 * The namespace pass remembers the last standalone namespace line encountered:
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 *
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 *     namespace Foo\Bar;
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 *
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 * ... which it then applies implicitly to all future evaluated code, until the
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 * namespace is replaced by another namespace. To reset to the top level
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 * namespace, enter `namespace {}`. This is a bit ugly, but it does the trick :)
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 */
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class NamespacePass extends CodeCleanerPass
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{
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    private $namespace = null;
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    private $cleaner;
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    /**
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     * @param CodeCleaner $cleaner
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     */
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    public function __construct(CodeCleaner $cleaner)
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    {
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        $this->cleaner = $cleaner;
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    }
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    /**
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     * If this is a standalone namespace line, remember it for later.
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     *
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     * Otherwise, apply remembered namespaces to the code until a new namespace
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     * is encountered.
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     *
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     * @param array $nodes
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     *
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     * @return Node[]|null Array of nodes
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     */
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    public function beforeTraverse(array $nodes)
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    {
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        if (empty($nodes)) {
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            return $nodes;
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        }
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        $last = \end($nodes);
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        if ($last instanceof Namespace_) {
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            $kind = $last->getAttribute('kind');
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            // Treat all namespace statements pre-PHP-Parser v3.1.2 as "open",
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            // even though we really have no way of knowing.
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            if ($kind === null || $kind === Namespace_::KIND_SEMICOLON) {
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                // Save the current namespace for open namespaces
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                $this->setNamespace($last->name);
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            } else {
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                // Clear the current namespace after a braced namespace
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                $this->setNamespace(null);
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            }
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            return $nodes;
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        }
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        return $this->namespace ? [new Namespace_($this->namespace, $nodes)] : $nodes;
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    }
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    /**
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     * Remember the namespace and (re)set the namespace on the CodeCleaner as
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     * well.
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     *
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     * @param Name|null $namespace
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     */
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    private function setNamespace($namespace)
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    {
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        $this->namespace = $namespace;
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        $this->cleaner->setNamespace($namespace === null ? null : $namespace->parts);
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    }
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}