[gnome-flashback] screensaver: lock screen if systemd LockedHint is true

[Alberts Muktupāvels <muktupavels src gnome org>]

commit b8992fc9fe10730fa514cea72f916a75f97c1051
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Feb 12 19:34:49 2020 +0200

    screensaver: lock screen if systemd LockedHint is true
    
    Re-lock screen on startup if systemd LockedHint is set to true. This
    might happen if gnome-flashback crashed while lock screen was active.

 dbus/org.freedesktop.login1.Session.xml      | 2 ++
 gnome-flashback/libscreensaver/gf-listener.c | 6 ++++++
 2 files changed, 8 insertions(+)
---
diff --git a/dbus/org.freedesktop.login1.Session.xml b/dbus/org.freedesktop.login1.Session.xml
index 028dada..d3d07bb 100644
--- a/dbus/org.freedesktop.login1.Session.xml
+++ b/dbus/org.freedesktop.login1.Session.xml
@@ -7,6 +7,8 @@
 
     <property name="Active" type="b" access="read" />
 
+    <property name="LockedHint" type="b" access="read" />
+
     <method name="SetLockedHint">
       <arg direction="in" type="b" />
     </method>
diff --git a/gnome-flashback/libscreensaver/gf-listener.c b/gnome-flashback/libscreensaver/gf-listener.c
index df5698b..63641bc 100644
--- a/gnome-flashback/libscreensaver/gf-listener.c
+++ b/gnome-flashback/libscreensaver/gf-listener.c
@@ -363,6 +363,12 @@ login_session_ready_cb (GObject      *object,
 
   g_signal_connect (self->login_session, "notify::active",
                     G_CALLBACK (notify_active_cb), self);
+
+  if (gf_login_session_gen_get_locked_hint (self->login_session))
+    {
+      g_debug ("systemd LockedHint=True");
+      g_signal_emit (self, listener_signals[LOCK], 0);
+    }
 }
 
 static void