Refactored web-app

remoting/webapp/me2mom/modal.js

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview

[garykac, 2011/10/27 22:32:39]

nit: something like 'appmode.js' sounds more descriptive than 'modal.js'

[Jamie, 2011/10/27 22:51:37]

Done. I went with ui_mode.js, since the relevant tag in html is data-ui-mode.

+ * Functions related to controlling the modal ui state of the app.
+ */
+
+'use strict';
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+/** @enum {string} */
+remoting.AppMode = {
+  HOME: 'home',
+  UNAUTHENTICATED: 'auth',
+  CLIENT: 'client',
+    CLIENT_UNCONNECTED: 'client.unconnected',
+    CLIENT_CONNECTING: 'client.connecting',
+    CLIENT_CONNECT_FAILED: 'client.connect-failed',
+    CLIENT_SESSION_FINISHED: 'client.session-finished',
+  HOST: 'host',
+    HOST_WAITING_FOR_CODE: 'host.waiting-for-code',
+    HOST_WAITING_FOR_CONNECTION: 'host.waiting-for-connection',
+    HOST_SHARED: 'host.shared',
+    HOST_SHARE_FAILED: 'host.share-failed',
+    HOST_SHARE_FINISHED: 'host.share-finished',
+  IN_SESSION: 'in-session'
+};
+
+/**
+ * @type {remoting.AppMode} The current app mode
+ */
+remoting.currentMode;
+
+/**
+ * Change the app's modal state to |mode|, which is considered to be a dotted
+ * hierachy of modes. For example, setMode('host.shared') will show any modal
+ * elements with an data-ui-mode attribute of 'host' or 'host.shared' and hide
+ * all others.
+ *
+ * @param {remoting.AppMode} mode The new modal state, expressed as a dotted
+ * hiearchy.
+ */
+remoting.setMode = function(mode) {
+  var modes = mode.split('.');
+  for (var i = 1; i < modes.length; ++i)
+    modes[i] = modes[i - 1] + '.' + modes[i];
+  var elements = document.querySelectorAll('[data-ui-mode]');
+  for (var i = 0; i < elements.length; ++i) {
+    var element = /** @type {Element} */ elements[i];
+    var hidden = true;
+    for (var m = 0; m < modes.length; ++m) {
+      if (hasClass(element.getAttribute('data-ui-mode'), modes[m])) {
+        hidden = false;
+        break;
+      }
+    }
+    element.hidden = hidden;
+  }
+  remoting.debug.log('App mode: ' + mode);
+  remoting.currentMode = mode;
+  if (mode == remoting.AppMode.IN_SESSION) {
+    document.removeEventListener('keydown', remoting.DebugLog.onKeydown, false);
+  } else {
+    document.addEventListener('keydown', remoting.DebugLog.onKeydown, false);
+  }
+};
+
+/**
+ * Get the major mode that the app is running in.
+ * @return {string} The app's current major mode.
+ */
+remoting.getMajorMode = function() {
+  return remoting.currentMode.split('.')[0];
+};