*: 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, 10 insertions, 1 deletions

diff --git a/src/vwm.c b/src/vwm.c
index 179b1dc..c2c3027 100644
--- a/src/vwm.c
+++ b/src/vwm.c
@@ -126,7 +126,7 @@ static vwm_t * vwm_startup(void)
 #undef color
 
 	XSelectInput(VWM_XDISPLAY(vwm), VWM_XROOT(vwm),
-		     PropertyChangeMask | SubstructureNotifyMask | SubstructureRedirectMask | PointerMotionMask | ButtonPressMask | ButtonReleaseMask);
+		     FocusChangeMask | PropertyChangeMask | SubstructureNotifyMask | SubstructureRedirectMask | PointerMotionMask | ButtonPressMask | ButtonReleaseMask);
 	XGrabKey(VWM_XDISPLAY(vwm), AnyKey, WM_GRAB_MODIFIER, VWM_XROOT(vwm), False, GrabModeAsync, GrabModeAsync);
 
 	XFlush(VWM_XDISPLAY(vwm));
@@ -259,6 +259,15 @@ void vwm_process_event(vwm_t *vwm)
 			vwm_xevent_handle_property_notify(vwm, &event.xproperty);
 			break;
 
+		case FocusIn:
+			VWM_TRACE("focusin");
+			vwm_xevent_handle_focusin(vwm, &event.xfocus);
+			break;
+
+		case FocusOut:
+			VWM_TRACE("focusout");
+			break;
+
 		case MappingNotify:
 			VWM_TRACE("mapping notify");
 			vwm_xevent_handle_mapping_notify(vwm, &event.xmapping);