[gnome-characters: 7/10] Use ES6 classes

[Daiki Ueno <dueno src gnome org>]

commit 265258d0bc0e7dd592514ef7306df8eeb4cf6ed2
Author: tommy <tommyshem485 gmail com>
Date:   Mon Jun 18 23:13:38 2018 +0100

    Use ES6 classes

 src/service.js | 38 ++++++++++++++++++--------------------
 1 file changed, 18 insertions(+), 20 deletions(-)
---
diff --git a/src/service.js b/src/service.js
index 22e5606..8ef912b 100644
--- a/src/service.js
+++ b/src/service.js
@@ -27,7 +27,7 @@ pkg.require({ 'Gio': '2.0',
 const Gio = imports.gi.Gio;
 const GLib = imports.gi.GLib;
 const Gtk = imports.gi.Gtk;
-const Lang = imports.lang;
+const GObject = imports.gi.GObject;
 
 const Util = imports.util;
 const SearchProvider = imports.searchProvider;
@@ -38,53 +38,51 @@ function initEnvironment() {
     };
 }
 
-const BackgroundService = new Lang.Class({
-    Name: 'CharactersBackgroundService',
+const BackgroundService = GObject.registerClass({
     // This needs to be a Gtk.Application instead of Gio.Application,
     // to get Gtk.Clipboard working.
-    Extends: Gtk.Application,
-
-    _init: function() {
-        this.parent({ application_id: pkg.name,
+}, class BackgroundService extends Gtk.Application {
+    _init() {
+        super._init({ application_id: pkg.name,
                       flags: Gio.ApplicationFlags.IS_SERVICE,
                       inactivity_timeout: 30000 });
         GLib.set_application_name(_("Characters"));
 
         this._searchProvider = new SearchProvider.SearchProvider(this);
-    },
+    }
 
-    _onQuit: function() {
+    _onQuit() {
         this.quit();
-    },
+    }
 
-    vfunc_dbus_register: function(connection, path) {
-        this.parent(connection, path);
+    vfunc_dbus_register(connection, path) {
+        super.vfunc_dbus_register(connection, path);
 
         this._searchProvider.export(connection, path);
         return true;
-    },
+    }
 
 /*
   Can't do until GApplication is fixed.
 
-    vfunc_dbus_unregister: function(connection, path) {
+    vfunc_dbus_unregister(connection, path) {
         this._searchProvider.unexport(connection);
 
-        this.parent(connection, path);
+        super.vfunc_dbus_unregister(connection, path);
     },
 */
 
-    vfunc_startup: function() {
-        this.parent();
+    vfunc_startup() {
+        super.vfunc_startup();
 
         Util.initActions(this,
                          [{ name: 'quit',
                             activate: this._onQuit }]);
-    },
+    }
 
-    vfunc_activate: function() {
+    vfunc_activate() {
         // do nothing, this is a background service
-    },
+    }
 });
 
 function main(argv) {