Implement apps v2 custom window frame.

remoting/webapp/window_frame.js

+// Copyright 2014 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
+ * Apps v2 custom title bar implementation
+ */
+
+'use strict';
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+/**
+ * @param {HTMLElement} titleBar The root node of the title-bar DOM hierarchy.
+ * @constructor
+ */
+remoting.WindowFrame = function(titleBar) {
+  /**
+   * @type {boolean}
+   * @private
+   */
+  this.isConnected_ = false;
+
+  /**
+   * @type {HTMLElement}
+   * @private
+   */
+  this.titleBar_ = titleBar;
+
+  /**
+   * @type {HTMLElement}
+   * @private
+   */
+  this.hoverTarget_ = /** @type {HTMLElement} */
+      (titleBar.querySelector('.window-controls-hover-target'));
+  base.debug.assert(this.hoverTarget_ != null);
+
+  /**
+   * @type {HTMLElement}
+   * @private
+   */
+  this.maximizeRestoreControl_ = /** @type {HTMLElement} */
+      (titleBar.querySelector('.window-maximize-restore'));
+  base.debug.assert(this.maximizeRestoreControl_ != null);
+
+  /**
+   * @type {Array.<{cls:string, fn: function()}>}
+   */
+  var handlers = [
+    { cls: 'window-disconnect', fn: this.disconnectSession_.bind(this) },
+    { cls: 'window-maximize-restore',
+      fn: this.maximizeOrRestoreWindow_.bind(this) },
+    { cls: 'window-minimize', fn: this.minimizeWindow_.bind(this) },
+    { cls: 'window-close', fn: window.close.bind(window) },
+    { cls: 'window-controls-stub', fn: this.toggleWindowControls_.bind(this) }
+  ];
+  for (var i = 0; i < handlers.length; ++i) {
+    var element = titleBar.querySelector('.' + handlers[i].cls);
+    base.debug.assert(element != null);
+    element.addEventListener('click', handlers[i].fn, false);
+  }
+
+  // Ensure that tool-tips are always correct.
+  this.updateMaximizeOrRestoreIconTitle_();
+  chrome.app.window.current().onMaximized.addListener(
+      this.updateMaximizeOrRestoreIconTitle_.bind(this));
+  chrome.app.window.current().onRestored.addListener(
+      this.updateMaximizeOrRestoreIconTitle_.bind(this));
+  chrome.app.window.current().onFullscreened.addListener(
+      this.updateMaximizeOrRestoreIconTitle_.bind(this));
+};
+
+/**
+ * @param {boolean} isConnected True if there is a connection active.
+ */
+remoting.WindowFrame.prototype.setConnected = function(isConnected) {
+  this.isConnected_ = isConnected;
+  if (this.isConnected_) {
+    document.body.classList.add('connected');
+  } else {
+    document.body.classList.remove('connected');
+  }
+  this.updateMaximizeOrRestoreIconTitle_();
+};
+
+/**
+ * @return {{width: number, height: number}} The size of the window, ignoring
+ *     the title-bar and window borders, if visible.
+ */
+remoting.WindowFrame.prototype.getClientArea = function() {
+  if (chrome.app.window.current().isFullscreen()) {
+    return { 'height': window.innerHeight, 'width': window.innerWidth };
+  } else {
+    var kBorderWidth = 1;
+    var titleHeight = this.titleBar_.clientHeight;
+    return {
+      'height': window.innerHeight - titleHeight - 2 * kBorderWidth,
+      'width': window.innerWidth - 2 * kBorderWidth
+    };
+  }
+};
+
+/**
+ * @private
+ */
+remoting.WindowFrame.prototype.disconnectSession_ = function() {
+  // When the user disconnects, exit full-screen mode. This should not be
+  // necessary, as we do the same thing in client_session.js when the plugin
+  // is removed. However, there seems to be a bug in chrome.AppWindow.restore
+  // that causes it to get stuck in full-screen mode without this.
+  if (chrome.app.window.current().isFullscreen()) {
+    chrome.app.window.current().restore();
+    chrome.app.window.current().restore();
+  }
+  remoting.disconnect();
+};
+
+/**
+ * @private
+ */
+remoting.WindowFrame.prototype.maximizeOrRestoreWindow_ = function() {
+  /** @type {boolean} */
+  var restore =
+      chrome.app.window.current().isFullscreen() ||
+      chrome.app.window.current().isMaximized();
+  if (restore) {
+    // Restore twice: once to exit full-screen and once to exit maximized.
+    // If the app is not full-screen, or went full-screen without first
+    // being maximized, then the second restore has no effect.
+    chrome.app.window.current().restore();
+    chrome.app.window.current().restore();
+  } else {
+    chrome.app.window.current().maximize();
+  }
+};
+
+/**
+ * @private
+ */
+remoting.WindowFrame.prototype.minimizeWindow_ = function() {
+  chrome.app.window.current().minimize();
+};
+
+/**
+ * @private
+ */
+remoting.WindowFrame.prototype.toggleWindowControls_ = function() {
+  this.hoverTarget_.classList.toggle('opened');
+};
+
+/**
+ * Update the tool-top for the maximize/full-screen/restore icon to reflect
+ * its current behaviour.
+ *
+ * @private
+ */
+remoting.WindowFrame.prototype.updateMaximizeOrRestoreIconTitle_ = function() {
+  /** @type {string} */
+  var tag = '';
+  if (chrome.app.window.current().isFullscreen()) {
+    tag = /*i18n-content*/'EXIT_FULL_SCREEN';
+  } else if (chrome.app.window.current().isMaximized()) {
+    tag = /*i18n-content*/'RESTORE_WINDOW';
+  } else if (this.isConnected_) {
+    tag = /*i18n-content*/'FULL_SCREEN';
+  } else {
+    tag = /*i18n-content*/'MAXIMIZE_WINDOW';
+  }
+  this.maximizeRestoreControl_.title = l10n.getTranslationOrError(tag);
+};
+
+/** @type {remoting.WindowFrame} */
+remoting.windowFrame = null;