Flatpak: Create Autostart File Via Background Portal

data/io.elementary.calendar.appdata.xml.in

@@ -11,6 +11,15 @@
     <p>A slim, lightweight calendar app that syncs and manages multiple calendars in one place, like Google Calendar, Outlook and CalDAV.</p>
   </description>
   <releases>
+    <release version="6.2.0" date="2023-05-23" urgency="medium">
+      <description>
+        <p>Minor Updates:</p>
+          <ul>
+            <li>Ask the user's permission to run in background if required</li>
+          </ul>
+      </description>
+    </release>
+
     <release version="6.1.3" date="2023-05-15" urgency="medium">
       <description>
         <p>Minor Updates:</p>

data/meson.build

@@ -13,12 +13,6 @@ foreach i : icon_sizes
     )
 endforeach
 
-install_data(
-    'daemon.desktop',
-    rename: meson.project_name() + '-daemon.desktop',
-    install_dir: join_paths(get_option('sysconfdir'), 'xdg', 'autostart')
-)
-
 install_data(
     meson.project_name() + '.gschema.xml',
     install_dir: join_paths(get_option('prefix'), get_option('datadir'), 'glib-2.0', 'schemas')

io.elementary.calendar.yml

@@ -120,6 +120,17 @@ modules:
         url: https://gitlab.gnome.org/GNOME/geocode-glib.git
         tag: '3.26.2'
 
+  - name: libportal
+    buildsystem: meson
+    config-opts:
+      - "-Dbackends=['gtk3']"
+      - '-Ddocs=false'
+      - '-Dtests=false'
+    sources:
+      - type: git
+        url: https://github.com/flatpak/libportal.git
+        tag: '0.6'
+
   - name: calendar
     buildsystem: meson
     sources:

meson.build

@@ -52,6 +52,8 @@ folks_dep = dependency('folks')
 gclue_dep = dependency('libgeoclue-2.0')
 libecal_dep = dependency('libecal-2.0')
 libical_dep = dependency('libical-glib')
+libportal_dep = [ dependency('libportal'), dependency('libportal-gtk3') ]
+
 add_project_arguments('-DLIBICAL_GLIB_UNSTABLE_API=1', language: 'c')
 
 m_dep = meson.get_compiler('c').find_library('m', required : false)

src/Application.vala

@@ -1,6 +1,6 @@
 // -*- Mode: vala; indent-tabs-mode: nil; tab-width: 4 -*-
 /*-
- * Copyright (c) 2011-2018 elementary, Inc. (https://elementary.io)
+ * Copyright (c) 2011-2023 elementary, Inc. (https://elementary.io)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,6 +28,8 @@ namespace Maya {
         private static bool add_event = false;
         private static string show_day = null;
 
+        private Xdp.Portal? portal = null;
+
         private const OptionEntry[] APP_OPTIONS = {
             { "add-event", 'a', 0, OptionArg.NONE, out add_event, N_("Create an event"), null },
             { "show-day", 's', 0, OptionArg.STRING, out show_day, N_("Focus the given day"), N_("date") },
@@ -61,10 +63,17 @@ namespace Maya {
         }
 
         protected override void activate () {
+            new Calendar.TodayEventMonitor ();
             if (run_in_background) {
                 run_in_background = false;
-                new Calendar.TodayEventMonitor ();
                 hold ();
+
+                ask_for_background.begin ((obj, res) => {
+                    if (!ask_for_background.end (res)) {
+                        release ();
+                    }
+                });
+
                 return;
             }
 
@@ -166,6 +175,31 @@ namespace Maya {
             Calendar.EventStore.get_default ().delete_trashed_calendars ();
         }
 
+        public async bool ask_for_background () {
+            const string[] DAEMON_COMMAND = { "io.elementary.calendar", "--background" };
+            if (portal == null) {
+                portal = new Xdp.Portal ();
+            }
+
+            string reason = _(
+                "Calendar will automatically start when this device turns on " +
+                "and run when its window is closed so that it can send event notifications."
+            );
+            var command = new GenericArray<unowned string> (2);
+            foreach (unowned var arg in DAEMON_COMMAND) {
+                command.add (arg);
+            }
+
+            var window = Xdp.parent_new_gtk (active_window);
+
+            try {
+                return yield portal.request_background (window, reason, command, AUTOSTART, null);
+            } catch (Error e) {
+                warning ("Error during portal request: %s", e.message);
+                return e is IOError.FAILED;
+            }
+        }
+
         public static DateTime get_selected_datetime () {
             var selected_day = saved_state.get_string ("selected-day");
             if (selected_day == null || selected_day == "") {

src/MainWindow.vala

@@ -1,6 +1,6 @@
 // -*- Mode: vala; indent-tabs-mode: nil; tab-width: 4 -*-
 /*-
- * Copyright (c) 2011-2020 elementary, Inc. (https://elementary.io)
+ * Copyright (c) 2011-2023 elementary, Inc. (https://elementary.io)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -182,4 +182,17 @@ public class Maya.MainWindow : Hdy.ApplicationWindow {
 
         return base.configure_event (event);
     }
+
+    public override bool delete_event (Gdk.EventAny event) {
+        ((Application) application).ask_for_background.begin ((obj, res) => {
+            unowned var app = (Application) obj;
+            if (app.ask_for_background.end (res)) {
+                hide ();
+            } else {
+                destroy ();
+            }
+        });
+
+        return Gdk.EVENT_STOP;
+    }
 }

src/TodayEventMonitor.vala

@@ -16,6 +16,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+[SingleInstance]
 public class Calendar.TodayEventMonitor : GLib.Object {
     private Gee.HashMultiMap<ECal.Component, string> event_uids;
 

src/meson.build

@@ -61,7 +61,8 @@ calendar_deps = [
     clutter_gtk_dep,
     folks_dep,
     geocode_glib_dep,
-    gclue_dep
+    gclue_dep,
+    libportal_dep
 ]
 
 executable(