[gnome-maps/wip/mlundblad/es6: 5/5] WIP: Use ES6 classes with GObject extensions



commit 254e2432085214a2edd3982d1ba2eeb2eca46008
Author: Marcus Lundblad <ml update uu se>
Date:   Mon Nov 20 21:27:49 2017 +0100

    WIP: Use ES6 classes with GObject extensions

 src/accountListBox.js   |   26 ++++++--------
 src/application.js      |   88 +++++++++++++++++++++++------------------------
 src/busyMarker.js       |    8 ++---
 src/checkIn.js          |   55 +++++++++++++----------------
 src/checkInDialog.js    |   58 +++++++++++++++----------------
 src/contactPlace.js     |   16 ++++-----
 src/contextMenu.js      |   48 ++++++++++++-------------
 src/exportViewDialog.js |   40 ++++++++++-----------
 src/facebookBackend.js  |   52 +++++++++++++--------------
 src/serviceBackend.js   |   44 ++++++++++++------------
 10 files changed, 206 insertions(+), 229 deletions(-)
---
diff --git a/src/accountListBox.js b/src/accountListBox.js
index e45a21e..e829535 100644
--- a/src/accountListBox.js
+++ b/src/accountListBox.js
@@ -21,25 +21,23 @@
 
 const Gio = imports.gi.Gio;
 const Goa = imports.gi.Goa;
+const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
-const Lang = imports.lang;
 
 const Application = imports.application;
 
-var AccountRow = new Lang.Class({
-    Name: 'AccountRow',
-    Extends: Gtk.ListBoxRow,
+var AccountRow = GObject.registerClass({
     Template: 'resource:///org/gnome/Maps/ui/account-row.ui',
     InternalChildren: [ 'providerLabel',
                         'identityLabel',
                         'providerImage',
                         'attentionNeededImage' ],
-
-    _init: function(params) {
+}, class AccountRow extends Gtk.ListBoxRow {
+    _init(params) {
         this.account = params.account;
         delete params.account;
 
-        this.parent(params);
+        super._init(params);
 
         let account = this.account.get_account();
 
@@ -50,16 +48,14 @@ var AccountRow = new Lang.Class({
     }
 });
 
-var AccountListBox = new Lang.Class({
-    Name: 'AccountListBox',
-    Extends: Gtk.ListBox,
+var AccountListBox = GObject.registerClass({
     Signals: {
         'account-selected': { param_types: [Goa.Object] }
     },
-
-    _init: function(params) {
+}, class AccountListBox extends Gtk.ListBox {
+    _init(params) {
         params.activate_on_single_click = true;
-        this.parent(params);
+        super._init(params);
 
         Application.checkInManager.connect('accounts-refreshed', () => { this.refresh(); });
 
@@ -67,9 +63,9 @@ var AccountListBox = new Lang.Class({
                      (list, row) => { this.emit('account-selected', row.account); });
 
         this.refresh();
-    },
+    }
 
-    refresh: function() {
+    refresh() {
         let accounts = Application.checkInManager.accounts;
 
         this.forall(function(row) {
diff --git a/src/application.js b/src/application.js
index c155ba3..6e2fb9f 100644
--- a/src/application.js
+++ b/src/application.js
@@ -25,7 +25,6 @@ const GObject = imports.gi.GObject;
 const Gio = imports.gi.Gio;
 const Gtk = imports.gi.Gtk;
 const GtkClutter = imports.gi.GtkClutter;
-const Lang = imports.lang;
 const WebKit2 = imports.gi.WebKit2;
 
 const CheckIn = imports.checkIn;
@@ -62,9 +61,7 @@ var routeQuery = null;
 const _ensuredTypes = [WebKit2.WebView,
                        OSMTypeSearchEntry.OSMTypeSearchEntry];
 
-var Application = new Lang.Class({
-    Name: 'Application',
-    Extends: Gtk.Application,
+var Application = GObject.registerClass({
     Properties: {
         'connected': GObject.ParamSpec.boolean('connected',
                                                '',
@@ -72,24 +69,25 @@ var Application = new Lang.Class({
                                                GObject.ParamFlags.READABLE |
                                                GObject.ParamFlags.WRITABLE)
     },
+}, class Application extends Gtk.Application {
 
     set connected(p) {
         this._connected = p;
         this.notify('connected');
-    },
+    }
 
     get connected() {
         return this._connected;
-    },
+    }
 
-    _init: function() {
+    _init() {
         /* Translators: This is the program name. */
         GLib.set_application_name(_("Maps"));
 
         /* Needed to be able to use in UI files */
         _ensuredTypes.forEach((type) => { GObject.type_ensure(type); });
 
-        this.parent({ application_id: 'org.gnome.Maps',
+        super._init({ application_id: 'org.gnome.Maps',
                       flags: Gio.ApplicationFlags.HANDLES_OPEN });
         this._connected = false;
 
@@ -118,13 +116,13 @@ var Application = new Lang.Class({
 
             return -1;
         });
-    },
+    }
 
-    _checkNetwork: function() {
+    _checkNetwork() {
         this.connected = networkMonitor.connectivity === Gio.NetworkConnectivity.FULL;
-    },
+    }
 
-    _showContact: function(id) {
+    _showContact(id) {
         contactStore.lookup(id, (contact) => {
             this._mainWindow.markBusy();
             if (!contact) {
@@ -136,9 +134,9 @@ var Application = new Lang.Class({
                 this._mainWindow.mapView.showContact(contact);
             });
         });
-    },
+    }
 
-    _onShowContactActivate: function(action, parameter) {
+    _onShowContactActivate(action, parameter) {
         this._createWindow();
         this._checkNetwork();
         this._mainWindow.present();
@@ -153,20 +151,20 @@ var Application = new Lang.Class({
                     this._showContact(id);
             });
         }
-    },
+    }
 
-    _onQuitActivate: function() {
+    _onQuitActivate() {
         this._mainWindow.destroy();
-    },
+    }
 
-    _onOsmAccountSetupActivate: function() {
+    _onOsmAccountSetupActivate() {
         let dialog = osmEdit.createAccountDialog(this._mainWindow, false);
 
         dialog.show();
         dialog.connect('response', () => { dialog.destroy(); });
-    },
+    }
 
-    _addContacts: function() {
+    _addContacts() {
         contactStore.get_contacts().forEach((contact) => {
             contact.geocode(function() {
                 contact.get_places().forEach((p) => {
@@ -180,9 +178,9 @@ var Application = new Lang.Class({
                 });
             });
         });
-    },
+    }
 
-    _initPlaceStore: function() {
+    _initPlaceStore() {
         placeStore = new PlaceStore.PlaceStore({
             recentPlacesLimit: settings.get('recent-places-limit'),
             recentRoutesLimit: settings.get('recent-routes-limit')
@@ -202,18 +200,18 @@ var Application = new Lang.Class({
                     this._addContacts();
             });
         }
-    },
+    }
 
-    _initAppMenu: function() {
+    _initAppMenu() {
         let builder = new Gtk.Builder();
         builder.add_from_resource('/org/gnome/Maps/ui/app-menu.ui');
 
         let menu = builder.get_object('app-menu');
         this.set_app_menu(menu);
-    },
+    }
 
-    vfunc_startup: function() {
-        this.parent();
+    vfunc_startup() {
+        super.vfunc_startup();
 
         GtkClutter.init(null);
 
@@ -237,9 +235,9 @@ var Application = new Lang.Class({
                                                                              'icons']));
         this._initPlaceStore();
         this._initAppMenu();
-    },
+    }
 
-    _initServices: function() {
+    _initServices() {
         settings         = Settings.getSettings('org.gnome.Maps');
         routeQuery       = new RouteQuery.RouteQuery();
         routingDelegator = new RoutingDelegator.RoutingDelegator({ query: routeQuery });
@@ -252,9 +250,9 @@ var Application = new Lang.Class({
         contactStore = new Maps.ContactStore();
         contactStore.load();
         osmEdit = new OSMEdit.OSMEdit();
-    },
+    }
 
-    _createWindow: function() {
+    _createWindow() {
         if (this._mainWindow)
             return;
 
@@ -268,24 +266,24 @@ var Application = new Lang.Class({
                 log('* focus widget: %s'.format(widget));
             });
         }
-    },
+    }
 
-    vfunc_dbus_register: function(connection, path) {
-        this.parent(connection, path);
+    vfunc_dbus_register(connection, path) {
+        super.vfunc_dbus_register(connection, path);
         return true;
-    },
+    }
 
-    vfunc_dbus_unregister: function(connection, path) {
-        this.parent(connection, path);
-    },
+    vfunc_dbus_unregister(connection, path) {
+        super.vfunc_dbus_register(connection, path);
+    }
 
-    vfunc_activate: function() {
+    vfunc_activate() {
         this._createWindow();
         this._checkNetwork();
         this._mainWindow.present();
-    },
+    }
 
-    _openInternal: function(files) {
+    _openInternal(files) {
         if (!this._mainWindow || !this._mainWindow.mapView.view.realized)
             return;
 
@@ -298,9 +296,9 @@ var Application = new Lang.Class({
         } else {
             this._mainWindow.mapView.openShapeLayers(files);
         }
-    },
+    }
 
-    vfunc_open: function(files) {
+    vfunc_open(files) {
         normalStartup = false;
         this.activate();
 
@@ -310,9 +308,9 @@ var Application = new Lang.Class({
         else
             mapView.view.connect('notify::realized',
                                  this._openInternal.bind(this, files));
-    },
+    }
 
-    _onWindowDestroy: function(window) {
+    _onWindowDestroy(window) {
         this._mainWindow = null;
     }
 });
diff --git a/src/busyMarker.js b/src/busyMarker.js
index b53962d..3f99c3d 100644
--- a/src/busyMarker.js
+++ b/src/busyMarker.js
@@ -18,10 +18,8 @@
  */
 
 const Gtk = imports.gi.Gtk;
-const Lang = imports.lang;
+const GObject = imports.gi.GObject;
 
-var BusyMarker = new Lang.Class({
-    Name: 'BusyMarker',
-    Extends: Gtk.Frame,
+var BusyMarker = GObject.registerClass({
     Template: 'resource:///org/gnome/Maps/ui/busy-marker.ui'
-});
+}, class BusyMarker extends Gtk.Frame {});
diff --git a/src/checkIn.js b/src/checkIn.js
index d75d492..e314da7 100644
--- a/src/checkIn.js
+++ b/src/checkIn.js
@@ -22,15 +22,12 @@
 const GObject = imports.gi.GObject;
 const Goa = imports.gi.Goa;
 const Gtk = imports.gi.Gtk;
-const Lang = imports.lang;
 
 const CheckInDialog = imports.checkInDialog;
 const FacebookBackend = imports.facebookBackend;
 const FoursquareBackend = imports.foursquareBackend;
 
-var CheckInManager = new Lang.Class({
-    Name: 'CheckInManager',
-    Extends: GObject.Object,
+var CheckInManager = GObject.registerClass({
     Signals: {
         'accounts-refreshed': { }
     },
@@ -39,10 +36,10 @@ var CheckInManager = new Lang.Class({
                                                 '',
                                                 '',
                                                 GObject.ParamFlags.READABLE)
-    },
-
-    _init: function() {
-        this.parent();
+    }
+}, class CheckInManager extends GObject.Object {
+    _init() {
+        super._init();
 
         try {
             this._goaClient = Goa.Client.new_sync(null);
@@ -66,17 +63,17 @@ var CheckInManager = new Lang.Class({
         }
 
         this._refreshGoaAccounts();
-    },
+    }
 
-    _initBackends: function() {
+    _initBackends() {
         let facebookBackend = new FacebookBackend.FacebookBackend();
         this._backends[facebookBackend.name] = facebookBackend;
 
         let foursquareBackend = new FoursquareBackend.FoursquareBackend();
         this._backends[foursquareBackend.name] = foursquareBackend;
-    },
+    }
 
-    _refreshGoaAccounts: function() {
+    _refreshGoaAccounts() {
         if (!this._goaClient)
             return;
         let accounts = this._goaClient.get_accounts();
@@ -99,39 +96,39 @@ var CheckInManager = new Lang.Class({
 
         this.emit('accounts-refreshed');
         this.notify('hasCheckIn');
-    },
+    }
 
     get client() {
         return this._goaClient;
-    },
+    }
 
     get accounts() {
         return this._accounts;
-    },
+    }
 
     get hasCheckIn() {
         return this._accounts.length > 0;
-    },
+    }
 
-    _getAuthorizer: function(account) {
+    _getAuthorizer(account) {
         return this._authorizers[account.get_account().id];
-    },
+    }
 
-    _getBackend: function(account) {
+    _getBackend(account) {
         return this._backends[account.get_account().provider_type];
-    },
+    }
 
-    performCheckIn: function(account, checkIn, callback, cancellable) {
+    performCheckIn(account, checkIn, callback, cancellable) {
         this._getBackend(account)
             .performCheckIn(this._getAuthorizer(account), checkIn, callback, cancellable);
-    },
+    }
 
-    findPlaces: function(account, latitude, longitude, distance, callback, cancellable) {
+    findPlaces(account, latitude, longitude, distance, callback, cancellable) {
         this._getBackend(account)
             .findPlaces(this._getAuthorizer(account), latitude, longitude, distance, callback, cancellable);
-    },
+    }
 
-    showCheckInDialog: function(parentWindow, place, matchPlace) {
+    showCheckInDialog(parentWindow, place, matchPlace) {
         let dialog = new CheckInDialog.CheckInDialog({ transient_for: parentWindow,
                                                        matchPlace: matchPlace,
                                                        place: place });
@@ -170,14 +167,12 @@ var CheckInManager = new Lang.Class({
     }
 });
 
-var CheckIn = new Lang.Class({
-    Name: 'CheckIn',
-
-    _init: function() {
+var CheckIn = class {
+    _init() {
         this.message = null;
         this.place = null;
         this.privacy = null;
         this.broadcastFacebook = false;
         this.broadcastTwitter = false;
     }
-});
+};
diff --git a/src/checkInDialog.js b/src/checkInDialog.js
index 66dd6e9..371465b 100644
--- a/src/checkInDialog.js
+++ b/src/checkInDialog.js
@@ -20,8 +20,8 @@
  */
 
 const Gio = imports.gi.Gio;
+const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
-const Lang = imports.lang;
 const Mainloop = imports.mainloop;
 
 const AccountListBox = imports.accountListBox;
@@ -39,9 +39,7 @@ var Response = {
     FAILURE_CHECKIN_DISABLED: 5
 };
 
-var CheckInDialog = new Lang.Class({
-    Name: 'CheckInDialog',
-    Extends: Gtk.Dialog,
+var CheckInDialog = GObject.registerClass({
     Template: 'resource:///org/gnome/Maps/ui/check-in-dialog.ui',
     InternalChildren: [ 'cancelButton',
                         'okButton',
@@ -59,8 +57,8 @@ var CheckInDialog = new Lang.Class({
                         'foursquareOptionsPrivacyComboBox',
                         'foursquareOptionsBroadcastFacebookCheckButton',
                         'foursquareOptionsBroadcastTwitterCheckButton' ],
-
-    _init: function(params) {
+}, class CheckInDialog extends Gtk.Dialog {
+    _init(params) {
         this._place = params.place;
         delete params.place;
 
@@ -70,7 +68,7 @@ var CheckInDialog = new Lang.Class({
         // This is a construct-only property and cannot be set by GtkBuilder
         params.use_header_bar = true;
 
-        this.parent(params);
+        super._init(params);
 
         this._account = null;
         this._checkIn = new CheckIn.CheckIn();
@@ -86,16 +84,16 @@ var CheckInDialog = new Lang.Class({
 
         this._initHeaderBar();
         this._initWidgets();
-    },
+    }
 
-    _initHeaderBar: function() {
+    _initHeaderBar() {
         this._cancelButton.connect('clicked',
                                    () => { this._cancellable.cancel(); });
 
         this._okButton.connect('clicked', () => { this._startCheckInStep(); });
-    },
+    }
 
-    _initWidgets: function() {
+    _initWidgets() {
         // Limitations in Gjs means we can't do this in UI files yet
         this._accountListBox = new AccountListBox.AccountListBox({ visible: true });
         this._accountFrame.add(this._accountListBox);
@@ -128,14 +126,14 @@ var CheckInDialog = new Lang.Class({
             this._checkIn.place = place;
             this._startMessageStep();
         });
-    },
+    }
 
-    vfunc_show: function() {
+    vfunc_show() {
         this._startup();
-        this.parent();
-    },
+        super.vfunc_show();
+    }
 
-    _startup: function() {
+    _startup() {
         let accounts = Application.checkInManager.accounts;
 
         if (accounts.length > 1)
@@ -148,9 +146,9 @@ var CheckInDialog = new Lang.Class({
                 this.response(Response.FAILURE_CHECKIN_DISABLED);
             });
         }
-    },
+    }
 
-    _onAccountRefreshed: function() {
+    _onAccountRefreshed() {
         let accounts = Application.checkInManager.accounts;
 
         if (!Application.checkInManager.hasCheckIn)
@@ -163,14 +161,14 @@ var CheckInDialog = new Lang.Class({
 
             this.response(Response.FAILURE_ACCOUNT_DISABLED);
         }
-    },
+    }
 
-    _startAccountStep: function() {
+    _startAccountStep() {
         this.set_title(_("Select an account"));
         this._stack.set_visible_child_name('account');
-    },
+    }
 
-    _startPlaceStep: function() {
+    _startPlaceStep() {
         this.set_title(_("Loading"));
         this._stack.set_visible_child_name('loading');
 
@@ -180,9 +178,9 @@ var CheckInDialog = new Lang.Class({
                                               100,
                                               this._onFindPlacesFinished.bind(this),
                                               this._cancellable);
-    },
+    }
 
-    _onFindPlacesFinished: function(account, places, error) {
+    _onFindPlacesFinished(account, places, error) {
         if (!error) {
             if (places.length === 0) {
                 this.response(Response.FAILURE_NO_PLACES);
@@ -212,9 +210,9 @@ var CheckInDialog = new Lang.Class({
             this.error = error;
             this.response(Response.FAILURE_GET_PLACES);
         }
-    },
+    }
 
-    _startMessageStep: function() {
+    _startMessageStep() {
         /* Translators: %s is the name of the place to check in.
          */
         this.set_title(_("Check in to %s").format(this._checkIn.place.name));
@@ -240,9 +238,9 @@ var CheckInDialog = new Lang.Class({
                 optionsGrids[provider].show();
             else
                 optionsGrids[provider].hide();
-    },
+    }
 
-    _startCheckInStep: function() {
+    _startCheckInStep() {
         this.set_title(_("Loading"));
         this._stack.set_visible_child_name('loading');
 
@@ -268,9 +266,9 @@ var CheckInDialog = new Lang.Class({
                                                   this._checkIn,
                                                   this._onPerformCheckInFinished.bind(this),
                                                   this._cancellable);
-    },
+    }
 
-    _onPerformCheckInFinished: function (account, data, error) {
+    _onPerformCheckInFinished(account, data, error) {
         if (!error)
             this.response(Response.SUCCESS);
         else {
diff --git a/src/contactPlace.js b/src/contactPlace.js
index b2d8876..961ea29 100644
--- a/src/contactPlace.js
+++ b/src/contactPlace.js
@@ -19,25 +19,23 @@
  * Author: Jonas Danielsson <jonas threetimestwo org>
  */
 
-const Lang = imports.lang;
+const GObject = imports.gi.GObject;
 
 const Place = imports.place;
 
-var ContactPlace = new Lang.Class({
-    Name: 'ContactPlace',
-    Extends: Place.Place,
-
-    _init: function(params) {
+var ContactPlace = GObject.registerClass({},
+class ContactPlace extends Place.Place {
+    _init(params) {
         this._contact = params.contact;
         delete params.contact;
 
         params.store = false;
-        this.parent(params);
-    },
+        super._init(params);
+    }
 
     get icon() {
         return this._contact.icon;
-    },
+    }
 
     get uniqueID() {
         return [this.name,
diff --git a/src/contextMenu.js b/src/contextMenu.js
index c80b42b..d604991 100644
--- a/src/contextMenu.js
+++ b/src/contextMenu.js
@@ -22,12 +22,12 @@
 const Champlain = imports.gi.Champlain;
 const Gdk = imports.gi.Gdk;
 const Geocode = imports.gi.GeocodeGlib;
+const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
 const Mainloop = imports.mainloop;
 
 const Application = imports.application;
 const ExportViewDialog = imports.exportViewDialog;
-const Lang = imports.lang;
 const Location = imports.location;
 const OSMAccountDialog = imports.osmAccountDialog;
 const OSMEdit = imports.osmEdit;
@@ -36,24 +36,22 @@ const Place = imports.place;
 const Utils = imports.utils;
 const ZoomInNotification = imports.zoomInNotification;
 
-var ContextMenu = new Lang.Class({
-    Name: 'ContextMenu',
-    Extends: Gtk.Menu,
+var ContextMenu = GObject.registerClass({
     Template: 'resource:///org/gnome/Maps/ui/context-menu.ui',
     InternalChildren: [ 'whatsHereItem',
                         'geoURIItem',
                         'exportItem',
                         'addOSMLocationItem',
                         'routeItem' ],
-
-    _init: function(params) {
+}, class ContextMenu extends Gtk.Menu {
+    _init(params) {
         this._mapView = params.mapView;
         delete params.mapView;
 
         this._mainWindow = params.mainWindow;
         delete params.mainWindow;
 
-        this.parent(params);
+        super._init(params);
 
         this._mapView.connect('button-release-event',
                               this._onButtonReleaseEvent.bind(this));
@@ -72,9 +70,9 @@ var ContextMenu = new Lang.Class({
                                        this._routingUpdate.bind(this));
         this._routeItem.visible = false;
         this._routingUpdate();
-    },
+    }
 
-    _onButtonReleaseEvent: function(widget, event) {
+    _onButtonReleaseEvent(widget, event) {
         let [, button] = event.get_button();
         let [, x, y] = event.get_coords();
         this._longitude = this._mapView.view.x_to_longitude(x);
@@ -84,9 +82,9 @@ var ContextMenu = new Lang.Class({
             // Need idle to avoid Clutter dead-lock on re-entrance
             Mainloop.idle_add(() => { this.popup_at_pointer(event); });
         }
-    },
+    }
 
-    _routingUpdate: function() {
+    _routingUpdate() {
         let query = Application.routeQuery;
 
         if (query.points.length === 0)
@@ -100,9 +98,9 @@ var ContextMenu = new Lang.Class({
         } else {
             this._routeItem.label = _("Route to here");
         }
-    },
+    }
 
-    _onRouteActivated: function() {
+    _onRouteActivated() {
         let query = Application.routeQuery;
         let location = new Location.Location({ latitude: this._latitude,
                                                longitude: this._longitude,
@@ -116,9 +114,9 @@ var ContextMenu = new Lang.Class({
         } else {
             query.points[query.points.length - 1].place = place;
         }
-    },
+    }
 
-    _onWhatsHereActivated: function() {
+    _onWhatsHereActivated() {
         let location = new Location.Location({ latitude: this._latitude,
                                                longitude: this._longitude,
                                                accuracy: 0 });
@@ -131,9 +129,9 @@ var ContextMenu = new Lang.Class({
                 Application.notificationManager.showMessage(msg);
             }
         });
-    },
+    }
 
-    _onGeoURIActivated: function() {
+    _onGeoURIActivated() {
         let location = new Location.Location({ latitude: this._latitude,
                                                longitude: this._longitude,
                                                accuracy: 0 });
@@ -142,9 +140,9 @@ var ContextMenu = new Lang.Class({
         let uri = location.to_uri(Geocode.LocationURIScheme.GEO);
 
         clipboard.set_text(uri, uri.length);
-    },
+    }
 
-    _onAddOSMLocationActivated: function() {
+    _onAddOSMLocationActivated() {
         let osmEdit = Application.osmEdit;
         /* if the user is not alread signed in, show the account dialog */
         if (!osmEdit.isSignedIn) {
@@ -161,9 +159,9 @@ var ContextMenu = new Lang.Class({
         }
 
         this._addOSMLocation();
-    },
+    }
 
-    _addOSMLocation: function() {
+    _addOSMLocation() {
         let osmEdit = Application.osmEdit;
 
         if (this._mapView.view.get_zoom_level() < OSMEdit.MIN_ADD_LOCATION_ZOOM_LEVEL) {
@@ -187,9 +185,9 @@ var ContextMenu = new Lang.Class({
                     _("Location was added to the map, note that it may take a while before it shows on the 
map and in search results."));
             }
         });
-    },
+    }
 
-    _activateExport: function() {
+    _activateExport() {
         let view = this._mapView.view;
         let surface = view.to_surface(true);
         let bbox = view.get_bounding_box();
@@ -206,9 +204,9 @@ var ContextMenu = new Lang.Class({
 
         dialog.connect('response', () => { dialog.destroy(); });
         dialog.show_all();
-    },
+    }
 
-    _onExportActivated: function() {
+    _onExportActivated() {
         if (this._mapView.view.state === Champlain.State.DONE) {
             this._activateExport();
         } else {
diff --git a/src/exportViewDialog.js b/src/exportViewDialog.js
index c946563..55295dc 100644
--- a/src/exportViewDialog.js
+++ b/src/exportViewDialog.js
@@ -21,8 +21,8 @@ const Cairo = imports.cairo;
 const Gdk = imports.gi.Gdk;
 const GLib = imports.gi.GLib;
 const Gio = imports.gi.Gio;
+const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
-const Lang = imports.lang;
 
 const Utils = imports.utils;
 
@@ -33,9 +33,7 @@ var Response = {
 
 const _PREVIEW_WIDTH = 150;
 
-var ExportViewDialog = new Lang.Class({
-    Name: 'ExportViewDialog',
-    Extends: Gtk.Dialog,
+var ExportViewDialog = GObject.registerClass({
     Template: 'resource:///org/gnome/Maps/ui/export-view-dialog.ui',
     InternalChildren: [ 'exportButton',
                         'cancelButton',
@@ -43,8 +41,8 @@ var ExportViewDialog = new Lang.Class({
                         'fileChooserButton',
                         'previewArea',
                         'layersCheckButton' ],
-
-    _init: function(params) {
+}, class ExportViewDialog extends Gtk.Dialog {
+    _init(params) {
         this._surface = params.surface;
         delete params.surface;
 
@@ -58,7 +56,7 @@ var ExportViewDialog = new Lang.Class({
         delete params.mapView;
 
         params.use_header_bar = true;
-        this.parent(params);
+        super._init(params);
 
         this._cancelButton.connect('clicked', () => { this.response(Response.CANCEL); });
         this._exportButton.connect('clicked', () => { this._exportView(); });
@@ -74,18 +72,18 @@ var ExportViewDialog = new Lang.Class({
         this._filenameEntry.text = this._fileName = this._getName();
         this._fileChooserButton.set_current_folder(this._folder);
         this._setupPreviewArea();
-    },
+    }
 
-    _getName: function() {
+    _getName() {
         /* Translators: This is a format string for a PNG filename for an
          * exported image with coordinates. The .png extension should be kept
          * intact in the translated string.
          */
         return _("Maps at %f, %f.png").format(this._latitude.toFixed(2),
                                               this._longitude.toFixed(2));
-    },
+    }
 
-    _setupPreviewArea: function() {
+    _setupPreviewArea() {
         let [surfaceWidth, surfaceHeight] = this._mapView.view.get_size();
 
         let width = _PREVIEW_WIDTH;
@@ -95,9 +93,9 @@ var ExportViewDialog = new Lang.Class({
         this._previewArea.set_size_request(width, height);
         this._previewArea.connect('draw',
                                   (w, cr) => { this._drawPreview(w, cr); });
-    },
+    }
 
-    _drawPreview: function(widget, cr) {
+    _drawPreview(widget, cr) {
         cr.setOperator(Cairo.Operator.CLEAR);
         cr.paint();
         cr.setOperator(Cairo.Operator.OVER);
@@ -105,9 +103,9 @@ var ExportViewDialog = new Lang.Class({
         cr.scale(this._scaleFactor, this._scaleFactor);
         cr.setSourceSurface(this._surface, 0, 0);
         cr.paint();
-    },
+    }
 
-    _onFileNameChanged: function() {
+    _onFileNameChanged() {
         let name = GLib.filename_from_utf8(this._filenameEntry.text, -1)[0];
         name = name.toString();
         if (!name) {
@@ -122,9 +120,9 @@ var ExportViewDialog = new Lang.Class({
         } catch(e) {
             this._exportButton.sensitive = false;
         }
-    },
+    }
 
-    _onFolderChanged: function() {
+    _onFolderChanged() {
         let folder = this._fileChooserButton.get_filename();
 
         if (!GLib.file_test(folder, GLib.FileTest.IS_DIR)) {
@@ -138,9 +136,9 @@ var ExportViewDialog = new Lang.Class({
 
         this._exportButton.sensitive = true;
         this._folder = folder;
-    },
+    }
 
-    _exportView: function() {
+    _exportView() {
         let [width, height] = this._mapView.view.get_size();
         let pixbuf = Gdk.pixbuf_get_from_surface(this._surface, 0, 0, width, height);
         let path = GLib.build_filenamev([this._folder, this._fileName]);
@@ -174,9 +172,9 @@ var ExportViewDialog = new Lang.Class({
             dialog.connect('response', () => { dialog.destroy(); });
             dialog.show_all();
         }
-    },
+    }
 
-    _includeLayersChanged: function() {
+    _includeLayersChanged() {
         let includeLayers = this._layersCheckButton.get_active();
 
         this._surface = this._mapView.view.to_surface(includeLayers);
diff --git a/src/facebookBackend.js b/src/facebookBackend.js
index c01306f..9bf0f7d 100644
--- a/src/facebookBackend.js
+++ b/src/facebookBackend.js
@@ -20,43 +20,41 @@
  */
 
 const GFBGraph = imports.gi.GFBGraph;
-const Lang = imports.lang;
+const GObject = imports.gi.GObject;
 
 const ServiceBackend = imports.serviceBackend;
 const SocialPlace = imports.socialPlace;
 
 const _PLACE_LINK_FORMAT = 'https://www.facebook.com/%s';
 
-var FacebookBackend = new Lang.Class({
-    Name: 'SocialServiceFacebookBackend',
-    Extends: ServiceBackend.ServiceBackend,
-
+var FacebookBackend = GObject.registerClass({},
+class FacebookBackend extends ServiceBackend.ServiceBackend {
     get name() {
         return 'facebook';
-    },
+    }
 
-    createRestCall: function(authorizer) {
+    createRestCall(authorizer) {
         return GFBGraph.new_rest_call(authorizer);
-    },
+    }
 
-    refreshAuthorization: function(authorizer, cancellable) {
+    refreshAuthorization(authorizer, cancellable) {
         return authorizer.refresh_authorization(cancellable);
-    },
+    }
 
-    getAuthorizerAccount: function(authorizer) {
+    getAuthorizerAccount(authorizer) {
         return authorizer.goa_object;
-    },
+    }
 
-    createAuthorizer: function(account) {
+    createAuthorizer(account) {
         return new GFBGraph.GoaAuthorizer({ goa_object: account });
-    },
+    }
 
-    isTokenInvalid: function(restCall, data) {
+    isTokenInvalid(restCall, data) {
         return data.error &&
                (data.error.code === 2500 || data.error.code === 104 || data.error.code === 190);
-    },
+    }
 
-    isInvalidCall: function(restCall, data) {
+    isInvalidCall(restCall, data) {
         if (!data) {
             return true;
         } else if (data.error) {
@@ -64,21 +62,21 @@ var FacebookBackend = new Lang.Class({
         } else {
             return false;
         }
-    },
+    }
 
-    getCallResultCode: function(restCall, data) {
+    getCallResultCode(restCall, data) {
         return data ?
             (data.error ? data.error.code : null) :
             restCall.get_status_code();
-    },
+    }
 
-    getCallResultMessage: function(restCall, data) {
+    getCallResultMessage(restCall, data) {
         return data ?
             (data.error ? data.error.message : null) :
             restCall.get_status_message();
-    },
+    }
 
-    _realPerformCheckIn: function(authorizer, checkIn, callback, cancellable) {
+    _realPerformCheckIn(authorizer, checkIn, callback, cancellable) {
         this.callAsync(authorizer,
                        'POST',
                        'me/feed',
@@ -89,9 +87,9 @@ var FacebookBackend = new Lang.Class({
                        },
                        callback,
                        cancellable);
-    },
+    }
 
-    _realFindPlaces: function(authorizer, latitude, longitude, distance, callback, cancellable) {
+    _realFindPlaces(authorizer, latitude, longitude, distance, callback, cancellable) {
         this.callAsync(authorizer,
                        'GET',
                        'search',
@@ -102,9 +100,9 @@ var FacebookBackend = new Lang.Class({
                        },
                        callback,
                        cancellable);
-    },
+    }
 
-    createPlaces: function(rawData) {
+    createPlaces(rawData) {
         return rawData.data.map(function(place) {
             let link = _PLACE_LINK_FORMAT.format(place.id);
 
diff --git a/src/serviceBackend.js b/src/serviceBackend.js
index bbe7165..edcfdeb 100644
--- a/src/serviceBackend.js
+++ b/src/serviceBackend.js
@@ -19,42 +19,42 @@
  * Author: Damián Nohales <damiannohales gmail com>
  */
 
-const Lang = imports.lang;
+const GObject = imports.gi.GObject;
 
 const Utils = imports.utils;
 
-var ServiceBackend = new Lang.Class({
-    Name: 'SocialServiceServiceBackend',
-    Abstract: true,
+var ServiceBackend = GObject.registerClass({
+    Abstract: true
+}, class ServiceBackend extends GObject.Object {
 
     //Abstract
-    get name() { },
+    get name() { }
 
     //Abstract
-    createRestCall: function(authorizer) { },
+    createRestCall(authorizer) { }
 
     //Abstract
-    refreshAuthorization: function(authorizer, cancellable) { },
+    refreshAuthorization(authorizer, cancellable) { }
 
     //Abstract
-    getAuthorizerAccount: function(authorizer) { },
+    getAuthorizerAccount(authorizer) { }
 
     //Abstract
-    createAuthorizer: function(account) { },
+    createAuthorizer(account) { }
 
     //Abstract
-    isTokenInvalid: function(restCall, parsedPayload) { },
+    isTokenInvalid(restCall, parsedPayload) { }
 
     //Abstract
-    isInvalidCall: function(restCall, parsedPayload) { },
+    isInvalidCall(restCall, parsedPayload) { }
 
     //Abstract
-    getCallResultCode: function(restCall, parsedPayload) { },
+    getCallResultCode(restCall, parsedPayload) { }
 
     //Abstract
-    getCallResultMessage: function(restCall, parsedPayload) { },
+    getCallResultMessage(restCall, parsedPayload) { }
 
-    callAsync: function(authorizer, method, func, params, callback, cancellable, mustRefreshToken) {
+    callAsync(authorizer, method, func, params, callback, cancellable, mustRefreshToken) {
         mustRefreshToken = mustRefreshToken || true;
         cancellable = cancellable || null;
 
@@ -94,17 +94,17 @@ var ServiceBackend = new Lang.Class({
             else
                 callback(account, data, null);
         });
-    },
+    }
 
-    performCheckIn: function(authorizer, checkIn, callback, cancellable) {
+    performCheckIn(authorizer, checkIn, callback, cancellable) {
         callback = callback || function() {};
         this._realPerformCheckIn(authorizer, checkIn, callback, cancellable);
-    },
+    }
 
     //Abstract
-    _realPerformCheckIn: function(authorizer, checkIn, callback, cancellable) { },
+    _realPerformCheckIn(authorizer, checkIn, callback, cancellable) { }
 
-    findPlaces: function(authorizer, latitude, longitude, distance, callback, cancellable) {
+    findPlaces(authorizer, latitude, longitude, distance, callback, cancellable) {
         callback = callback || function() {};
         this._realFindPlaces(authorizer,
                              latitude,
@@ -117,11 +117,11 @@ var ServiceBackend = new Lang.Class({
                                      callback(account, [], error);
                              },
                              cancellable);
-    },
+    }
 
     //Abstract
-    _realFindPlaces: function(authorizer, latitude, longitude, distance, callback, cancellable) { },
+    _realFindPlaces(authorizer, latitude, longitude, distance, callback, cancellable) { }
 
     //Abstract
-    createPlaces: function(rawData) { }
+    createPlaces(rawData) { }
 });


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