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PhabricatorXHPASTViewPanelController.php
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			<?php

			abstract class PhabricatorXHPASTViewPanelController
			extends PhabricatorXHPASTViewController {

			private $id;
			private $storageTree;

			public function shouldAllowPublic() {
			return true;
			}

			public function willProcessRequest(array $data) {
			$this->id = $data['id'];
			$this->storageTree = id(new PhabricatorXHPASTParseTree())
			->load($this->id);

			if (!$this->storageTree) {
			throw new Exception(pht('No such AST!'));
			}
			}

			protected function getStorageTree() {
			return $this->storageTree;
			}

			protected function buildXHPASTViewPanelResponse($content) {
			$content = hsprintf(
			'<!DOCTYPE html>'.
			'<html>'.
			'<head>'.
			'<style type="text/css">
			body {
			white-space: pre;
			font: 10px "Monaco";
			cursor: pointer;
			}

			.token {
			padding: 2px 4px;
			margin: 2px 2px;
			border: 1px solid #bbbbbb;
			line-height: 24px;
			}

			ul {
			margin: 0 0 0 1em;
			padding: 0;
			list-style: none;
			line-height: 1em;
			}

			li {
			margin: 0;
			padding: 0;
			}

			li span {
			background: #dddddd;
			padding: 3px 6px;
			}

			</style>'.
			'</head>'.
			'<body>%s</body>'.
			'</html>',
			$content);

			return id(new AphrontWebpageResponse())
			->setFrameable(true)
			->setContent($content);
			}

			}