Added connection history (minus the history data)

remoting/webapp/connection_history.js

Index: remoting/webapp/connection_history.js
diff --git a/remoting/webapp/connection_history.js b/remoting/webapp/connection_history.js
new file mode 100644
index 0000000000000000000000000000000000000000..459fddfa4754298d359b8aad2f2ee372376d022c
--- /dev/null
+++ b/remoting/webapp/connection_history.js
@@ -0,0 +1,208 @@
+// Copyright (c) 2012 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
+ * Class to track of connections to and from this computer and display them.
+ */
+
+'use strict';
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+/** @constructor */
+remoting.ConnectionHistory = function() {
+  /** @type {HTMLElement} @private */
+  this.viewAll_ = document.getElementById('history-view-all');
+  /** @type {HTMLElement} @private */
+  this.viewOutgoing_ = document.getElementById('history-view-outgoing');
+  /** @type {HTMLElement} @private */
+  this.viewIncoming_ = document.getElementById('history-view-incoming');
+  /** @type {HTMLElement} @private */
+  this.clear_ = document.getElementById('clear-connection-history');
+  /** @type {HTMLElement} @private */
+  this.historyEntries_ = document.getElementById('connection-history-entries');
+  /** @type {remoting.ConnectionHistory.Filter} @private */
+  this.filter_ = remoting.ConnectionHistory.Filter.VIEW_ALL;
+
+  /** @type {remoting.ConnectionHistory} */
+  var that = this;
+  var closeButton = document.getElementById('close-connection-history');
+  closeButton.addEventListener('click', function() { that.hide(); }, false);
+  /** @param {Event} event Event identifying which button was clicked. */
+  var setFilter = function(event) { that.setFilter_(event.target); };
+  var clearHistory = function() { that.clearHistory_(); };
+  this.viewAll_.addEventListener('click', setFilter, false);
+  this.viewOutgoing_.addEventListener('click', setFilter, false);
+  this.viewIncoming_.addEventListener('click', setFilter, false);
+  this.clear_.addEventListener('click', clearHistory, false);
+};
+
+/** @enum {string} */
+remoting.ConnectionHistory.Filter = {
+  VIEW_ALL: 'history-view-all',
+  VIEW_OUTGOING: 'history-view-outgoing',
+  VIEW_INCOMING: 'history-view-incoming'
+};
+
+/** Show the dialog and refresh its contents */
+remoting.ConnectionHistory.prototype.show = function() {
+  this.load();
+  remoting.setMode(remoting.AppMode.HISTORY);
+};
+
+/** Hide the dialog */
+remoting.ConnectionHistory.prototype.hide = function() {
+  remoting.setMode(remoting.AppMode.HOME);
+};
+
+/**
+ * A saved entry in the connection history.
+ * @param {Object} object A Javascript object, which may or may not be of the
+ *     correct type.
+ * @constructor
+ */
+remoting.ConnectionHistory.Entry = function(object) {
+  this.valid =
+      'date' in object && typeof(object['date']) == 'number' &&
+      'from' in object && typeof(object['from']) == 'string' &&
+      'to' in object && typeof(object['to']) == 'string' &&
+      'duration' in object && typeof(object['duration']) == 'number';
+  if (this.valid) {
+    /** @type {Date} */
+    this.date = new Date(object['date']);
+    /** @type {string} */
+    this.from = object['from'];
+    /** @type {string} */
+    this.to = object['to'];
+    /** @type {number} */
+    this.duration = object['duration'];
+  }
+};
+
+/**
+ * @return {string} The connection duration, formatted as a string, or 'Not
+ *     available' if there is no duration stored.
+ * @private
+ */
+remoting.ConnectionHistory.Entry.prototype.durationString_ = function() {
+  var secs = this.duration % 60;
+  var mins = ((this.duration - secs) / 60) % 60;
+  var hours = (this.duration - secs - 60 * mins) / 3600;
+  if (secs < 10) {
+    secs = '0' + secs;
+  }
+  var result = mins + ':' + secs;
+  if (hours > 0) {
+    if (mins < 10) {
+      result = '0' + result;
+    }
+    result = hours + ':' + result;
+  }
+  return result;
+};
+
+/**
+ * @return {{summary: Element, detail: Element}} Two table rows containing the
+ *     summary and detail information, respectively, for the connection.
+ */
+remoting.ConnectionHistory.Entry.prototype.createTableRows = function() {
+  var summary = document.createElement('tr');
+  addClass(summary, 'connection-history-summary');
+  var zippy = document.createElement('td');
+  addClass(zippy, 'zippy');
+  summary.appendChild(zippy);
+  // TODO(jamiewalch): Find a way of combining date and time such both align
+  // vertically without being considered separate columns, which puts too much
+  // space between them.

[garykac, 2012/03/02 00:53:56]

For the 2-column case, shouldn't the space between them be controlled by the
<td> padding and margin?

[Jamie, 2012/03/02 01:11:05]

<td> has no margin IIRC. I tried your suggestion of setting the widths of these
columns to 1px, which works as far as ensuring that the gap between them is
controllable, but you end up with too narrow a gap between the second and third
columns. A solution involving flexboxes in the first column is probably feasible
but doesn't seem worth it at this stage.

+  var date = document.createElement('td');
+  // TODO(jamiewalch): Use a shorter localized version of the date.
+  date.innerText = this.date.toLocaleDateString();
+  summary.appendChild(date);
+  var time = document.createElement('td');
+  time.innerText = this.date.toLocaleTimeString();
+  summary.appendChild(time);
+  var from = document.createElement('td');
+  from.innerText = this.from;
+  summary.appendChild(from);
+  var to = document.createElement('td');
+  to.innerText = this.to;
+  summary.appendChild(to);
+  var duration = document.createElement('td');
+  duration.innerText = this.durationString_();
+  summary.appendChild(duration);
+  // TODO(jamiewalch): Fill out the detail row correctly.
+  var detail = document.createElement('tr');
+  addClass(detail, 'connection-history-detail');
+  for (var i = 0; i < summary.childElementCount; ++i) {
+    var td = document.createElement('td');
+    if (i != 0) {
+      // The inner div allows the details rows to be hidden without changing
+      // the column widths.
+      var div = document.createElement('div');
+      div.innerText = 'Nothing to see here';
+      td.appendChild(div);
+    }
+    detail.appendChild(td);
+  }
+  /** @param {Element} node The summary row. */
+  var toggleDetail = function(node) {
+    if (hasClass(node.className, 'expanded')) {
+      removeClass(node, 'expanded');
+    } else {
+      addClass(node, 'expanded');
+    }
+  };
+  summary.addEventListener('click',
+                           function() { toggleDetail(summary); },
+                           false);
+  detail.addEventListener('click',
+                          function() { toggleDetail(summary); },
+                          false);
+  return { 'summary': summary, 'detail': detail };
+};
+
+/** Refresh the contents of the connection history table */
+remoting.ConnectionHistory.prototype.load = function() {
+  // TODO(jamiewalch): Load connection history data when it's available.
+  var history = [];
+  // Remove existing entries from the DOM and repopulate.
+  // TODO(jamiewalch): Enforce the filter.
+  this.historyEntries_.innerHTML = '';
+  for (var i in history) {
+    var connection = new remoting.ConnectionHistory.Entry(history[i]);
+    if (connection.valid) {
+      var rows = connection.createTableRows();
+      this.historyEntries_.appendChild(rows.summary);
+      this.historyEntries_.appendChild(rows.detail);
+    }
+  }
+};
+
+/**
+ * @param {EventTarget} element The element that was clicked.
+ * @private
+ */
+remoting.ConnectionHistory.prototype.setFilter_ = function(element) {
+  for (var i in remoting.ConnectionHistory.Filter) {
+    var link = document.getElementById(remoting.ConnectionHistory.Filter[i]);
+    if (element == link) {
+      addClass(link, 'no-link');
+      this.filter_ = /** @type {remoting.ConnectionHistory.Filter} */ (i);
+    } else {
+      removeClass(link, 'no-link');
+    }
+  }
+};
+
+/**
+ * @private
+ */
+remoting.ConnectionHistory.prototype.clearHistory_ = function() {
+  // TODO(jamiewalch): Implement once we store users' connection histories.
+};
+
+/** @type {remoting.ConnectionHistory} */
+remoting.ConnectionHistory.connectionHistory = null;