| 1 |
<?php declare(strict_types=1); |
| 2 |
|
| 3 |
namespace PhpParser\NodeVisitor; |
| 4 |
|
| 5 |
use PhpParser\Node; |
| 6 |
use PhpParser\NodeVisitorAbstract; |
| 7 |
|
| 8 |
/** |
| 9 |
* Visitor that connects a child node to its parent node |
| 10 |
* as well as its sibling nodes. |
| 11 |
* |
| 12 |
* On the child node, the parent node can be accessed through |
| 13 |
* <code>$node->getAttribute('parent')</code>, the previous |
| 14 |
* node can be accessed through <code>$node->getAttribute('previous')</code>, |
| 15 |
* and the next node can be accessed through <code>$node->getAttribute('next')</code>. |
| 16 |
*/ |
| 17 |
final class NodeConnectingVisitor extends NodeVisitorAbstract |
| 18 |
{ |
| 19 |
/** |
| 20 |
* @var Node[] |
| 21 |
*/ |
| 22 |
private $stack = []; |
| 23 |
|
| 24 |
/** |
| 25 |
* @var ?Node |
| 26 |
*/ |
| 27 |
private $previous; |
| 28 |
|
| 29 |
public function beforeTraverse(array $nodes) { |
| 30 |
$this->stack = []; |
| 31 |
$this->previous = null; |
| 32 |
} |
| 33 |
|
| 34 |
public function enterNode(Node $node) { |
| 35 |
if (!empty($this->stack)) { |
| 36 |
$node->setAttribute('parent', $this->stack[count($this->stack) - 1]); |
| 37 |
} |
| 38 |
|
| 39 |
if ($this->previous !== null && $this->previous->getAttribute('parent') === $node->getAttribute('parent')) { |
| 40 |
$node->setAttribute('previous', $this->previous); |
| 41 |
$this->previous->setAttribute('next', $node); |
| 42 |
} |
| 43 |
|
| 44 |
$this->stack[] = $node; |
| 45 |
} |
| 46 |
|
| 47 |
public function leaveNode(Node $node) { |
| 48 |
$this->previous = $node; |
| 49 |
|
| 50 |
array_pop($this->stack); |
| 51 |
} |
| 52 |
} |
| 53 |
|
