NMWirelessDialog: show an informative message when airplane mode is on

Rather than just showing "No networks", inform the user if airplane
mode is on or if wifi is off, and allow the user to change that
from the dialog (if possible).

https://bugzilla.gnome.org/show_bug.cgi?id=709128

data/theme/gnome-shell.css

@@ -289,6 +289,20 @@ StScrollBar StButton#vhandle:active {
     spacing: 10px;
 }
 
+.nm-dialog-airplane-box {
+    spacing: 12px;
+}
+
+.nm-dialog-airplane-headline {
+    font-size: 1.1em;
+    font-weight: bold;
+    text-align: center;
+}
+
+.nm-dialog-airplane-text {
+    color: #999999;
+}
+
 .nm-dialog-header-icon {
     icon-size: 32px;
 }
@@ -1453,6 +1467,10 @@ StScrollBar StButton#vhandle:active {
     color: #999999;
 }
 
+.no-networks-box {
+    spacing: 12px;
+}
+
 .notification {
     border-radius: 10px 10px 0px 0px;
     background: rgba(0,0,0,0.9);

js/ui/status/network.js

@@ -11,12 +11,14 @@ const NMGtk = imports.gi.NMGtk;
 const Signals = imports.signals;
 const St = imports.gi.St;
 
+const Animation = imports.ui.animation;
 const Main = imports.ui.main;
 const PanelMenu = imports.ui.panelMenu;
 const PopupMenu = imports.ui.popupMenu;
 const MessageTray = imports.ui.messageTray;
 const ModalDialog = imports.ui.modalDialog;
 const ModemManager = imports.misc.modemManager;
+const Rfkill = imports.ui.status.rfkill;
 const Util = imports.misc.util;
 
 const NMConnectionCategory = {
@@ -651,6 +653,13 @@ const NMWirelessDialog = new Lang.Class({
         this._client = client;
         this._device = device;
 
+        this._wirelessEnabledChangedId = this._client.connect('notify::wireless-enabled',
+                                                              Lang.bind(this, this._syncView));
+
+        this._rfkill = Rfkill.getRfkillManager();
+        this._airplaneModeChangedId = this._rfkill.connect('airplane-mode-changed',
+                                                           Lang.bind(this, this._syncView));
+
         this._networks = [];
         this._buildLayout();
 
@@ -669,6 +678,7 @@ const NMWirelessDialog = new Lang.Class({
         this._selectedNetwork = null;
         this._activeApChanged();
         this._updateSensitivity();
+        this._syncView();
 
         if (accessPoints.length == 0) {
             /* If there are no visible access points, request a scan */
@@ -689,6 +699,14 @@ const NMWirelessDialog = new Lang.Class({
             GObject.Object.prototype.disconnect.call(this._device, this._activeApChangedId);
             this._activeApChangedId = 0;
         }
+        if (this._wirelessEnabledChangedId) {
+            this._client.disconnect(this._wirelessEnabledChangedId);
+            this._wirelessEnabledChangedId = 0;
+        }
+        if (this._airplaneModeChangedId) {
+            this._rfkill.disconnect(this._airplaneModeChangedId);
+            this._airplaneModeChangedId = 0;
+        }
 
         this.parent();
     },
@@ -710,13 +728,44 @@ const NMWirelessDialog = new Lang.Class({
     },
 
     _updateSensitivity: function() {
-        let connectSensitive = this._selectedNetwork && (this._selectedNetwork != this._activeNetwork);
+        let connectSensitive = this._client.wireless_enabled && this._selectedNetwork && (this._selectedNetwork != this._activeNetwork);
         this._connectButton.reactive = connectSensitive;
         this._connectButton.can_focus = connectSensitive;
     },
 
-    _updateVisibility: function() {
+    _syncView: function() {
-        this._noNetworksLabel.visible = (this._networks.length == 0);
+        if (this._rfkill.airplaneMode) {
+            this._airplaneBox.show();
+
+            this._airplaneIcon.icon_name = 'airplane-mode-symbolic';
+            this._airplaneHeadline.text = _("Airplane Mode is On");
+            this._airplaneText.text = _("Wi-Fi is disabled when airplane mode is on.");
+            this._airplaneButton.label = _("Turn Off Airplane Mode");
+
+            this._airplaneButton.visible = !this._rfkill.hwAirplaneMode;
+            this._airplaneInactive.visible = this._rfkill.hwAirplaneMode;
+            this._noNetworksBox.hide();
+        } else if (!this._client.wireless_enabled) {
+            this._airplaneBox.show();
+
+            this._airplaneIcon.icon_name = 'dialog-information-symbolic';
+            this._airplaneHeadline.text = _("Wi-Fi is Off");
+            this._airplaneText.text = _("Wi-Fi needs to be turned on in order to connect to a network.");
+            this._airplaneButton.label = _("Turn On Wi-Fi");
+
+            this._airplaneButton.show();
+            this._airplaneInactive.hide();
+            this._noNetworksBox.hide();
+        } else {
+            this._airplaneBox.hide();
+
+            this._noNetworksBox.visible = (this._networks.length == 0);
+        }
+
+        if (this._noNetworksBox.visible)
+            this._noNetworksSpinner.play();
+        else
+            this._noNetworksSpinner.stop();
     },
 
     _buildLayout: function() {
@@ -750,11 +799,43 @@ const NMWirelessDialog = new Lang.Class({
         this._scrollView.add_actor(this._itemBox);
         this._stack.add_child(this._scrollView);
 
-        this._noNetworksLabel = new St.Label({ style_class: 'no-networks-label',
+        this._noNetworksBox = new St.BoxLayout({ vertical: true,
+                                                 style_class: 'no-networks-box',
+                                                 x_align: Clutter.ActorAlign.CENTER,
+                                                 y_align: Clutter.ActorAlign.CENTER });
+
+        this._noNetworksSpinner = new Animation.AnimatedIcon(global.datadir + '/theme/process-working.svg', 24, 24);
+        this._noNetworksBox.add_actor(this._noNetworksSpinner.actor);
+        this._noNetworksBox.add_actor(new St.Label({ style_class: 'no-networks-label',
+                                                     text: _("No Networks") }));
+        this._stack.add_child(this._noNetworksBox);
+
+        this._airplaneBox = new St.BoxLayout({ vertical: true,
+                                               style_class: 'nm-dialog-airplane-box',
                                                x_align: Clutter.ActorAlign.CENTER,
-                                               y_align: Clutter.ActorAlign.CENTER,
+                                               y_align: Clutter.ActorAlign.CENTER });
-                                               text: _("No Networks") });
+        this._airplaneIcon = new St.Icon({ icon_size: 48 });
-        this._stack.add_child(this._noNetworksLabel);
+        this._airplaneHeadline = new St.Label({ style_class: 'nm-dialog-airplane-headline' });
+        this._airplaneText = new St.Label({ style_class: 'nm-dialog-airplane-text' });
+
+        let airplaneSubStack = new St.Widget({ layout_manager: new Clutter.BinLayout });
+        this._airplaneButton = new St.Button({ style_class: 'modal-dialog-button' });
+        this._airplaneButton.connect('clicked', Lang.bind(this, function() {
+            if (this._rfkill.airplaneMode)
+                this._rfkill.airplaneMode = false;
+            else
+                this._client.wireless_enabled = true;
+        }));
+        airplaneSubStack.add_actor(this._airplaneButton);
+        this._airplaneInactive = new St.Label({ style_class: 'nm-dialog-airplane-text',
+                                                text: _("Use hardware switch to turn off") });
+        airplaneSubStack.add_actor(this._airplaneInactive);
+
+        this._airplaneBox.add(this._airplaneIcon, { x_align: St.Align.MIDDLE });
+        this._airplaneBox.add(this._airplaneHeadline, { x_align: St.Align.MIDDLE });
+        this._airplaneBox.add(this._airplaneText, { x_align: St.Align.MIDDLE });
+        this._airplaneBox.add(airplaneSubStack, { x_align: St.Align.MIDDLE });
+        this._stack.add_child(this._airplaneBox);
 
         this.contentLayout.add(this._stack, { expand: true });
 
@@ -947,7 +1028,7 @@ const NMWirelessDialog = new Lang.Class({
             this._itemBox.insert_child_at_index(network.item.actor, newPos);
         }
 
-        this._updateVisibility();
+        this._syncView();
     },
 
     _accessPointRemoved: function(device, accessPoint) {
@@ -969,7 +1050,7 @@ const NMWirelessDialog = new Lang.Class({
             this._resortItems();
         }
 
-        this._updateVisibility();
+        this._syncView();
     },
 
     _resortItems: function() {