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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2017 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\CodeCleaner;
use PhpParser\Node\Name;
use PhpParser\Node\Stmt\Namespace_;
use Psy\CodeCleaner;
/**
* Provide implicit namespaces for subsequent execution.
*
* The namespace pass remembers the last standalone namespace line encountered:
*
* namespace Foo\Bar;
*
* ... which it then applies implicitly to all future evaluated code, until the
* namespace is replaced by another namespace. To reset to the top level
* namespace, enter `namespace {}`. This is a bit ugly, but it does the trick :)
*/
class NamespacePass extends CodeCleanerPass
{
private $namespace = null;
private $cleaner;
/**
* @param CodeCleaner $cleaner
*/
public function __construct(CodeCleaner $cleaner)
{
$this->cleaner = $cleaner;
}
/**
* If this is a standalone namespace line, remember it for later.
*
* Otherwise, apply remembered namespaces to the code until a new namespace
* is encountered.
*
* @param array $nodes
*/
public function beforeTraverse(array $nodes)
{
if (empty($nodes)) {
return $nodes;
}
$last = end($nodes);
if (!$last instanceof Namespace_) {
return $this->namespace ? array(new Namespace_($this->namespace, $nodes)) : $nodes;
}
$this->setNamespace($last->name);
return $nodes;
}
/**
* Remember the namespace and (re)set the namespace on the CodeCleaner as
* well.
*
* @param null|Name $namespace
*/
private function setNamespace($namespace)
{
$this->namespace = $namespace;
$this->cleaner->setNamespace($namespace === null ? null : $namespace->parts);
}
}