(x_erase_phys_cursor): Don't erase cursor if cursor row

is invisible.  This can happen if cursor is on top line of a
window, and we switch to a buffer with a header line.

3 files changed, 14 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 24df4986e42..57e508f9f27 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -4,6 +4,8 @@
         is invisible.  This can happen if cursor is on top line of a
         window, and we switch to a buffer with a header line.
 
+        * w32term.c (x_erase_phys_cursor): ditto.
+
 2002-01-16  Pavel Jan,Bm(Bk  <Pavel@Janik.cz>
 
         * xterm.c (XTread_socket) [!USE_X_TOOLKIT]: Compute the value of
diff --git a/src/w32term.c b/src/w32term.c
index 9fe40866edc..af83ae53a2a 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -9462,6 +9462,12 @@ x_erase_phys_cursor (w)
   if (!cursor_row->enabled_p)
     goto mark_cursor_off;
   
+  /* If row is completely invisible, don't attempt to delete a cursor which
+     isn't there.  This may happen if cursor is at top of window, and
+     we switch to a buffer with a header line in that window.  */
+  if (cursor_row->visible_height <= 0)
+    goto mark_cursor_off;
+  
   /* This can happen when the new row is shorter than the old one.
      In this case, either x_draw_glyphs or clear_end_of_line
      should have cleared the cursor.  Note that we wouldn't be
diff --git a/src/xterm.c b/src/xterm.c
index 77860842d57..a428b4af8a6 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -11396,6 +11396,12 @@ x_erase_phys_cursor (w)
   if (!cursor_row->enabled_p)
     goto mark_cursor_off;
   
+  /* If row is completely invisible, don't attempt to delete a cursor which
+     isn't there.  This can happen if cursor is at top of a window, and
+     we switch to a buffer with a header line in that window.  */
+  if (cursor_row->visible_height <= 0)
+    goto mark_cursor_off;
+  
   /* This can happen when the new row is shorter than the old one.
      In this case, either x_draw_glyphs or clear_end_of_line
      should have cleared the cursor.  Note that we wouldn't be