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PhabricatorXHPASTViewTreeController.php
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			<?php

			final class PhabricatorXHPASTViewTreeController
			extends PhabricatorXHPASTViewPanelController {

			public function shouldAllowPublic() {
			return true;
			}

			public function handleRequest(AphrontRequest $request) {
			$storage = $this->getStorageTree();
			$input = $storage->getInput();
			$err = $storage->getReturnCode();
			$stdout = $storage->getStdout();
			$stderr = $storage->getStderr();

			try {
			$tree = XHPASTTree::newFromDataAndResolvedExecFuture(
			$input,
			array($err, $stdout, $stderr));
			} catch (XHPASTSyntaxErrorException $ex) {
			return $this->buildXHPASTViewPanelResponse($ex->getMessage());
			}

			$tree = phutil_tag('ul', array(), $this->buildTree($tree->getRootNode()));
			return $this->buildXHPASTViewPanelResponse($tree);
			}

			protected function buildTree($root) {
			try {
			$name = $root->getTypeName();
			$title = pht('Node %d: %s', $root->getID(), $name);
			} catch (Exception $ex) {
			$name = '???';
			$title = '???';
			}

			$tree = array();
			$tree[] = phutil_tag(
			'li',
			array(),
			phutil_tag(
			'span',
			array(
			'title' => $title,
			),
			$name));
			foreach ($root->getChildren() as $child) {
			$tree[] = phutil_tag('ul', array(), $this->buildTree($child));
			}
			return phutil_implode_html("\n", $tree);
			}

			}