(Fdelete_window): Handle deleting a parent of the selected window.

(Fdelete_window): Mostly undo last change which made `frame' a FRAME_PTR.
Don't initialize `frame' in the declaration.

1 files changed, 16 insertions, 3 deletions

diff --git a/src/window.c b/src/window.c
index e50a9bc7be5..d3baca1d8a2 100644
--- a/src/window.c
+++ b/src/window.c
@@ -700,9 +700,22 @@ DEFUN ("delete-window", Fdelete_window, Sdelete_window, 0, 1, "",
 
   /* Are we trying to delete any frame's selected window?  */
   {
-    FRAME_PTR frame = WINDOW_FRAME (XWINDOW (window));
+    Lisp_Object frame, pwindow;
 
-    if (EQ (window, FRAME_SELECTED_WINDOW (frame)))
+    /* See if the frame's selected window is either WINDOW
+       or any subwindow of it, by finding all that window's parents
+       and comparing each one with WINDOW.  */
+    frame = WINDOW_FRAME (XWINDOW (window));
+    pwindow = FRAME_SELECTED_WINDOW (XFRAME (frame));
+
+    while (!NILP (pwindow))
+      {
+        if (EQ (window, pwindow))
+          break;
+        pwindow = XWINDOW (pwindow)->parent;
+      }
+
+    if (EQ (window, pwindow))
       {
         Lisp_Object alternative = Fnext_window (window, Qlambda, Qnil);
 
@@ -714,7 +727,7 @@ DEFUN ("delete-window", Fdelete_window, Sdelete_window, 0, 1, "",
         if (EQ (window, selected_window))
           Fselect_window (alternative);
         else
-          FRAME_SELECTED_WINDOW (frame) = alternative;
+          FRAME_SELECTED_WINDOW (XFRAME (frame)) = alternative;
       }
   }