[gnome-remote-desktop] session: Add methods to notify subclasses of updated kbd lock states

[Jonas Ådahl <jadahl src gnome org>]

commit dde507f1fb09854d2e32ab23285590984ff080a3
Author: Pascal Nowack <Pascal Nowack gmx de>
Date:   Tue Feb 23 09:53:56 2021 +0100

    session: Add methods to notify subclasses of updated kbd lock states
    
    Add member functions for grd-session, which will be called, when the
    keyboard lock states caps-lock or num-lock have changed on the mutter
    side.
    This allows the RDP backend to synchronize the keyboard lock states,
    when necessary.

 src/grd-session.c | 40 ++++++++++++++++++++++++++++++++++++++++
 src/grd-session.h |  5 +++++
 2 files changed, 45 insertions(+)
---
diff --git a/src/grd-session.c b/src/grd-session.c
index 69f3819..de3fff2 100644
--- a/src/grd-session.c
+++ b/src/grd-session.c
@@ -697,6 +697,36 @@ on_remote_desktop_session_selection_transfer (GrdDBusRemoteDesktopSession *sessi
   g_free (data);
 }
 
+static void
+on_caps_lock_state_changed (GrdDBusRemoteDesktopSession *session_proxy,
+                            GParamSpec                  *param_spec,
+                            GrdSession                  *session)
+{
+  GrdSessionClass *klass = GRD_SESSION_GET_CLASS (session);
+  gboolean state;
+
+  state = grd_dbus_remote_desktop_session_get_caps_lock_state (session_proxy);
+  g_debug ("Caps lock state: %s", state ? "locked" : "unlocked");
+
+  if (klass->on_caps_lock_state_changed)
+    klass->on_caps_lock_state_changed (session, state);
+}
+
+static void
+on_num_lock_state_changed (GrdDBusRemoteDesktopSession *session_proxy,
+                           GParamSpec                  *param_spec,
+                           GrdSession                  *session)
+{
+  GrdSessionClass *klass = GRD_SESSION_GET_CLASS (session);
+  gboolean state;
+
+  state = grd_dbus_remote_desktop_session_get_num_lock_state (session_proxy);
+  g_debug ("Num lock state: %s", state ? "locked" : "unlocked");
+
+  if (klass->on_num_lock_state_changed)
+    klass->on_num_lock_state_changed (session, state);
+}
+
 static void
 on_remote_desktop_session_proxy_acquired (GObject      *object,
                                           GAsyncResult *result,
@@ -756,8 +786,18 @@ on_remote_desktop_session_proxy_acquired (GObject      *object,
                                             on_screen_cast_session_created,
                                             session);
 
+  g_signal_connect (session_proxy, "notify::caps-lock-state",
+                    G_CALLBACK (on_caps_lock_state_changed),
+                    session);
+  g_signal_connect (session_proxy, "notify::num-lock-state",
+                    G_CALLBACK (on_num_lock_state_changed),
+                    session);
+
   if (klass->remote_desktop_session_ready)
     klass->remote_desktop_session_ready (session);
+
+  on_caps_lock_state_changed (session_proxy, NULL, session);
+  on_num_lock_state_changed (session_proxy, NULL, session);
 }
 
 static void
diff --git a/src/grd-session.h b/src/grd-session.h
index e3e1c11..f4457e3 100644
--- a/src/grd-session.h
+++ b/src/grd-session.h
@@ -67,6 +67,11 @@ struct _GrdSessionClass
   void (*stream_ready) (GrdSession *session,
                         GrdStream  *stream);
   void (*stop) (GrdSession *session);
+
+  void (*on_caps_lock_state_changed) (GrdSession *session,
+                                      gboolean    state);
+  void (*on_num_lock_state_changed) (GrdSession *session,
+                                     gboolean    state);
 };
 
 GrdContext *grd_session_get_context (GrdSession *session);