Revert "Build Observatory with runtime"

runtime/observatory/lib/src/app/location_manager.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of app;
-
-abstract class LocationManager extends Observable {
-  final _initialPath = '/vm';
-  ObservatoryApplication _app;
-
-  String _lastUrl;
-
-  void _init(ObservatoryApplication app) {
-    // Called once.
-    assert(_app == null);
-    _app = app;
-    // Register for history events.
-    window.onPopState.listen(_onLocationChange);
-    _onStartup();
-  }
-
-  void _onStartup();
-  void _onLocationChange(PopStateEvent event);
-
-  void _pushUrl(String url) {
-    if (_lastUrl != url) {
-      Logger.root.info('Navigated to ${url}');
-      window.history.pushState(url, document.title, url);
-      _lastUrl = url;
-    }
-  }
-
-  /// Go to a specific url.
-  void go(String url) {
-    if ((url != makeLink('/vm-connect/')) && _app.vm == null) {
-      if (!window.confirm('Connection with VM has been lost. '
-                          'Proceeding will lose current page.')) {
-        return;
-      }
-      url = makeLink('/vm-connect/');
-    }
-    _pushUrl(url);
-    _go(url);
-  }
-
-  void _go(String url) {
-    // Chop off leading '#'.
-    if (url.startsWith('#')) {
-      url = url.substring(1);
-    }
-    // Fall through handles '#/'
-    // Chop off leading '/'.
-    if (url.startsWith('/')) {
-      url = url.substring(1);
-    }
-    var args;
-    // Parse out arguments.
-    if (url.contains('---')) {
-      var chunks = url.split('---');
-      url = chunks[0];
-      if ((chunks.length > 1) && (chunks[1] != '')) {
-        args = chunks[1];
-      }
-    }
-    _app._visit(url, args);
-  }
-
-  /// Go back.
-  void back() {
-    window.history.go(-1);
-  }
-
-  /// Go forward.
-  void forward() {
-    window.history.go(1);
-  }
-
-  /// Handle clicking on an application url link.
-  void onGoto(MouseEvent event, var detail, Element target) {
-    var href = target.attributes['href'];
-    if (event.button > 0 || event.metaKey || event.ctrlKey ||
-        event.shiftKey || event.altKey) {
-      // Not a left-click or a left-click with a modifier key:
-      // Let browser handle.
-      return;
-    }
-    go(href);
-    event.preventDefault();
-  }
-
-  /// Given an application url, generate a link.
-  String makeLink(String url);
-}
-
-/// Uses location.hash to encode application urls.
-class HashLocationManager extends LocationManager {
-  void _onStartup() {
-    String initialPath = '${window.location.hash}';
-    if ((window.location.hash == '') || (window.location.hash == '#')) {
-      initialPath = '#${_initialPath}';
-    }
-    window.history.pushState(initialPath, document.title, initialPath);
-    _go(window.location.hash);
-  }
-
-  void _onLocationChange(PopStateEvent _) {
-    _go(window.location.hash);
-  }
-
-  /// Given an application url, generate a link for an anchor tag.
-  String makeLink(String url) {
-    return '#$url';
-  }
-}
-
-/// Uses location.pathname to encode application urls. Requires server side
-/// rewriting to support copy and paste linking. pub serve makes this hard.
-/// STATUS: Work in progress.
-class LinkLocationManager extends LocationManager {
-  void _onStartup() {
-    Logger.root.warning('Using untested LinkLocationManager');
-    String initialPath = window.location.pathname;
-    if ((window.location.pathname == '/index.html') ||
-        (window.location.pathname == '/')) {
-      initialPath = '/vm';
-    }
-    window.history.replaceState(initialPath, document.title, initialPath);
-    _go(window.location.pathname);
-  }
-
-  void _onLocationChange(PopStateEvent _) {
-    _go(window.location.pathname);
-  }
-
-  /// Given an application url, generate a link for an anchor tag.
-  String makeLink(String url) => url;
-}