(Fdisplay_buffer): If largest or LRU window is the

only window, split it even if it is not eligible for splitting.
This restores the original behavior broken by the 2007-07-15
change.

1 files changed, 10 insertions, 9 deletions

diff --git a/src/window.c b/src/window.c
index c32b1a34f7d..8e75ef7f5d2 100644
--- a/src/window.c
+++ b/src/window.c
@@ -3738,12 +3738,13 @@ displayed.  */)
       else
         window = Fget_largest_window (frames, Qt);
 
-      /* If we got a tall enough full-width window that can be split,
-         split it.  */
+      /* If the largest window is tall enough, full-width, and either eligible
+         for splitting or the only window, split it.  */
       if (!NILP (window)
           && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame))
           && WINDOW_FULL_WIDTH_P (XWINDOW (window))
-          && window_height (window) >= split_height_threshold
+          && (window_height (window) >= split_height_threshold
+              || (NILP (XWINDOW (window)->parent)))
           && (window_height (window)
               >= (2 * window_min_size_2 (XWINDOW (window), 0))))
         window = Fsplit_window (window, Qnil, Qnil);
@@ -3752,13 +3753,13 @@ displayed.  */)
           Lisp_Object upper, lower, other;
 
           window = Fget_lru_window (frames, Qt);
-          /* If the LRU window is selected, and big enough,
-             and can be split, split it.  */
+          /* If the LRU window is tall enough, and either eligible for splitting
+          and selected or the only window, split it.  */
           if (!NILP (window)
               && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame))
-              && (EQ (window, selected_window)
-                  || NILP (XWINDOW (window)->parent))
-              && window_height (window) >= split_height_threshold
+              && ((EQ (window, selected_window)
+                   && window_height (window) >= split_height_threshold)
+                  || (NILP (XWINDOW (window)->parent)))
               && (window_height (window)
                   >= (2 * window_min_size_2 (XWINDOW (window), 0))))
             window = Fsplit_window (window, Qnil, Qnil);
@@ -7601,4 +7602,4 @@ keys_of_window ()
 }
 
 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
-   (do not change this comment) */
+   (do not change thisc omment) */