*: handle FocusIn events

Some programs call XSetInputFocus(), so we should select
FocusChangeEvent and handle FocusIn events, calling vwm_win_set_focus()
when appropriate.

It's rare, but SDL2 programs in particular seem to do this and vwm gets
in a pretty annoying state when it does occur.  This change should
improve the situation.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/xevent.c b/src/xevent.c
index e1b38e3..a14f37e 100644
--- a/src/xevent.c
+++ b/src/xevent.c
@@ -227,6 +227,19 @@ void vwm_xevent_handle_property_notify(vwm_t *vwm, XPropertyEvent *ev)
 }
 
 
+void vwm_xevent_handle_focusin(vwm_t *vwm, XFocusInEvent *ev)
+{
+	vwm_window_t	*vwin;
+
+	if (ev->mode != NotifyNormal)
+		return;
+
+	if ((vwin = vwm_win_lookup(vwm, ev->window)) &&
+	    (vwin != vwm_win_get_focused(vwm)))
+		vwm_win_set_focused(vwm, vwin);
+}
+
+
 void vwm_xevent_handle_mapping_notify(vwm_t *vwm, XMappingEvent *ev)
 {
 	XRefreshKeyboardMapping(ev);