public function visit(Node $visitable)
{
// node format
if ($visitable instanceof Terminal || $visitable instanceof Identifier) {
$this->leafFormatDecl .= " n{$this->currentNumber};";
} else {
$this->nodeFormatDecl .= " n{$this->currentNumber};";
}
// node decl
if ($visitable instanceof Terminal || $visitable instanceof Identifier) {
$label = "{{$visitable->getNodeName()}|" . addcslashes($visitable->value, '"{}|') . "}";
} else {
if ($visitable instanceof Rule) {
$label = "{{$visitable->getNodeName()}|{$visitable->name}}";
} else {
$label = $visitable->getNodeName();
}
}
$this->nodeDecl .= " n{$this->currentNumber} [label=\"{$label}\"];" . PHP_EOL;
// collect for edge decl
$this->idNodeMap[$this->currentNumber] = $visitable;
// next
$this->currentNumber++;
}
/**
* If as {@link Syntax} node comes around the visitor will be initializez.
* Which means that the depth property is read, the matrix and level properties
* will be initialized. All other {@link Node} types increment the level property.
*
* @param Node $visitable Visited node.
*
* @return void
*/
public function beforeVisit(Node $visitable)
{
if ($visitable instanceof Syntax) {
$this->depth = $visitable->depth();
$this->matrix = array();
$this->level = 0;
} else {
$this->level++;
}
// While we're visiting the output will change anyway.
$this->text = null;
}
/**
* Generates closing tags for composite nodes.
*
* @param Node $visitable Visited node.
*
* @return void
*/
public function afterVisit(Node $visitable)
{
if ($visitable instanceof Composite && $visitable->hasChildren()) {
$this->indentationLevel--;
$this->append("\n" . $this->indent() . self::createCloseTag($visitable->getNodeName()));
}
}
