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AASTNodeList.php
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Fri, Feb 7, 08:35

AASTNodeList.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @group aast
*/
final class AASTNodeList implements Iterator, Countable {
protected $list;
protected $tree;
protected $ids;
protected $pos;
public function count() {
return count($this->ids);
}
public function current() {
return $this->list[$this->key()];
}
public function rewind() {
$this->pos = 0;
}
public function valid() {
return $this->pos < count($this->ids);
}
public function next() {
$this->pos++;
}
public function key() {
return $this->ids[$this->pos];
}
public static function newFromTreeAndNodes(AASTTree $tree, array $nodes) {
$obj = new AASTNodeList();
$obj->tree = $tree;
$obj->list = $nodes;
$obj->ids = array_keys($nodes);
return $obj;
}
public static function newFromTree(AASTTree $tree) {
$obj = new AASTNodeList();
$obj->tree = $tree;
$obj->list = array(0 => $tree->getRootNode());
$obj->ids = array(0 => 0);
return $obj;
}
protected function __construct() {
}
public function getDescription() {
if (empty($this->list)) {
return 'an empty node list';
}
$desc = array();
$desc[] = "a list of ".count($this->list)." nodes:";
foreach ($this->list as $node) {
$desc[] = ' '.$node->getDescription().";";
}
return implode("\n", $desc);
}
protected function newList(array $nodes) {
return AASTNodeList::newFromTreeAndNodes(
$this->tree,
$nodes);
}
public function selectDescendantsOfType($type_name) {
$results = array();
foreach ($this->list as $id => $node) {
$results += $node->selectDescendantsOfType($type_name)->getRawNodes();
}
return $this->newList($results);
}
public function selectDescendantsOfTypes(array $type_names) {
$results = array();
foreach ($type_names as $type_name) {
foreach ($this->list as $id => $node) {
$results += $node->selectDescendantsOfType($type_name)->getRawNodes();
}
}
return $this->newList($results);
}
public function getChildrenByIndex($index) {
$results = array();
foreach ($this->list as $id => $node) {
$child = $node->getChildByIndex($index);
$results[$child->getID()] = $child;
}
return $this->newList($results);
}
public function add(AASTNodeList $list) {
foreach ($list->list as $id => $node) {
$this->list[$id] = $node;
}
$this->ids = array_keys($this->list);
return $this;
}
protected function executeSelectDescendantsOfType($node, $type) {
$results = array();
foreach ($node->getChildren() as $id => $child) {
if ($child->getTypeID() == $type) {
$results[$id] = $child;
} else {
$results += $this->executeSelectDescendantsOfType($child, $type);
}
}
return $results;
}
public function getTokens() {
$tokens = array();
foreach ($this->list as $node) {
$tokens += $node->getTokens();
}
return $tokens;
}
public function getRawNodes() {
return $this->list;
}
}

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