master c184033: Have X builds handle VisibilityNotify events (Bug#48268, Bug#48413)

[Martin Rudalics]

branch: master
commit c18403302df3f07a7f94c3984d65b808fb40e8c1
Author: Martin Rudalics <rudalics@gmx.at>
Commit: Martin Rudalics <rudalics@gmx.at>

    Have X builds handle VisibilityNotify events (Bug#48268, Bug#48413)
    
    * src/xterm.c (handle_one_xevent): Handle VisibilityNotify
    events (Bug#48268, Bug#48413).
---
 src/xterm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/xterm.c b/src/xterm.c
index bdf0804..1887c32 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -9343,6 +9343,11 @@ handle_one_xevent (struct x_display_info *dpyinfo,
       goto OTHER;
 
     case VisibilityNotify:
+      f = x_top_window_to_frame (dpyinfo, event->xvisibility.window);
+      if (f && (event->xvisibility.state == VisibilityUnobscured
+               || event->xvisibility.state == VisibilityPartiallyObscured))
+       SET_FRAME_VISIBLE (f, 1);
+
       goto OTHER;
 
     case MappingNotify: