Fix hiding tty cursor for overlapping children

* src/dispnew.c (is_cursor_obscured): If selected frame is in the
z-order of the root frame, use that, otherwise use the root frame.

(cherry picked from commit 42f1318e6579f94b90ef101f3f03ca65fb229262)

diff --git a/src/dispnew.c b/src/dispnew.c
index 627a9daf0bbd3bebd8504ae8f3962bad9fe62907..3328b197b07029d8b7e255a65ab67d277c9ba81c 100644 (file)
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -3906,10 +3906,12 @@ frame_selected_window_frame (struct frame *f)
 static bool
 is_cursor_obscured (struct frame *root)
 {
-  /* Determine in which frame on ROOT the cursor could be.  */
-  struct frame *sf = frame_selected_window_frame (root);
-  if (sf == NULL)
-    return false;
+  /* Which frame contains the cursor?  If the selected frame is in
+     root's z-order, it's the selected frame.  Otherwise fall back to
+     the root itself.  */
+  struct frame *sf = (frame_ancestor_p (root, SELECTED_FRAME ())
+                     ? SELECTED_FRAME ()
+                     : root);
 
   /* Give up if we can't tell where the cursor currently is.  */
   int x, y;