seat: forward UTERM_REFRESH events to sessions

On UTERM_REFRESH events we now forward the event to all sessions on the
bound seat. Sessions can then react to it and repaint the screen.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>

3 files changed, 49 insertions, 0 deletions

diff --git a/src/kmscon_main.c b/src/kmscon_main.c
index c3c94ca..cc7f3ed 100644
--- a/src/kmscon_main.c
+++ b/src/kmscon_main.c
@@ -265,6 +265,11 @@ static void app_seat_video_event(struct uterm_video *video,
 	case UTERM_GONE:
 		kmscon_seat_remove_display(vid->seat->seat, ev->display);
 		break;
+	case UTERM_REFRESH:
+		if (!vid->seat->app->exiting)
+			kmscon_seat_refresh_display(vid->seat->seat,
+						    ev->display);
+		break;
 	}
 }
 
diff --git a/src/kmscon_seat.c b/src/kmscon_seat.c
index 9565f49..5efa17b 100644
--- a/src/kmscon_seat.c
+++ b/src/kmscon_seat.c
@@ -139,6 +139,12 @@ static void session_call_display_gone(struct kmscon_session *sess,
 	session_call(sess, KMSCON_SESSION_DISPLAY_GONE, disp);
 }
 
+static void session_call_display_refresh(struct kmscon_session *sess,
+					 struct uterm_display *disp)
+{
+	session_call(sess, KMSCON_SESSION_DISPLAY_REFRESH, disp);
+}
+
 static void activate_display(struct kmscon_display *d)
 {
 	int ret;
@@ -513,6 +519,22 @@ static void seat_remove_display(struct kmscon_seat *seat,
 	free(d);
 }
 
+static void seat_refresh_display(struct kmscon_seat *seat,
+				 struct kmscon_display *d)
+{
+	struct shl_dlist *iter;
+	struct kmscon_session *s;
+
+	log_debug("refresh display %p from seat %s", d->disp, seat->name);
+
+	if (d->activated) {
+		shl_dlist_for_each(iter, &seat->sessions) {
+			s = shl_dlist_entry(iter, struct kmscon_session, list);
+			session_call_display_refresh(s, d->disp);
+		}
+	}
+}
+
 static int seat_vt_event(struct uterm_vt *vt, struct uterm_vt_event *ev,
 			 void *data)
 {
@@ -843,6 +865,25 @@ void kmscon_seat_remove_display(struct kmscon_seat *seat,
 	}
 }
 
+void kmscon_seat_refresh_display(struct kmscon_seat *seat,
+				 struct uterm_display *disp)
+{
+	struct shl_dlist *iter;
+	struct kmscon_display *d;
+
+	if (!seat || !disp)
+		return;
+
+	shl_dlist_for_each(iter, &seat->displays) {
+		d = shl_dlist_entry(iter, struct kmscon_display, list);
+		if (d->disp != disp)
+			continue;
+
+		seat_refresh_display(seat, d);
+		break;
+	}
+}
+
 int kmscon_seat_add_input(struct kmscon_seat *seat, const char *node)
 {
 	if (!seat || !node)
diff --git a/src/kmscon_seat.h b/src/kmscon_seat.h
index 9c20eef..8116968 100644
--- a/src/kmscon_seat.h
+++ b/src/kmscon_seat.h
@@ -58,6 +58,7 @@ typedef int (*kmscon_seat_cb_t) (struct kmscon_seat *seat,
 enum kmscon_session_event_type {
 	KMSCON_SESSION_DISPLAY_NEW,
 	KMSCON_SESSION_DISPLAY_GONE,
+	KMSCON_SESSION_DISPLAY_REFRESH,
 	KMSCON_SESSION_ACTIVATE,
 	KMSCON_SESSION_DEACTIVATE,
 	KMSCON_SESSION_UNREGISTER,
@@ -87,6 +88,8 @@ int kmscon_seat_add_display(struct kmscon_seat *seat,
 			    struct uterm_display *disp);
 void kmscon_seat_remove_display(struct kmscon_seat *seat,
 				struct uterm_display *disp);
+void kmscon_seat_refresh_display(struct kmscon_seat *seat,
+				 struct uterm_display *disp);
 int kmscon_seat_add_input(struct kmscon_seat *seat, const char *node);
 void kmscon_seat_remove_input(struct kmscon_seat *seat, const char *node);