Import buffer-display-count, buffer-display-time; thank you, Jeff Sparkes. man/ChangeLog addition: 2010-05-17 Jeff Sparkes <jsparkes@gmail.com> * lispref/windows.texi (Buffers and Windows): Document buffer-display-count and buffer-display-time with descriptions from GNU emacs lispref. * lispref/locals.texi (Standard Buffer-Local Variables): Add buffer-display-count and buffer-display-time. src/ChangeLog addition: 2010-05-17 Jeff Sparkes <jsparkes@gmail.com> * buffer.c (complex_vars_of_buffer): Add buffer local variables buffer-display-count and buffer-display-time. (common_init_complex_vars_of_buffer): Initialize them here. * bufslots.h: Add slots for buffer-display-count and buffer-display-time. * window.c (Fset_window_buffer): Update buffer-display-count and buffer-display-time whenever a buffer is displayed.

--- a/src/window.c	Mon May 24 10:43:29 2010 +0200
+++ b/src/window.c	Fri May 28 13:48:22 2010 +0100
@@ -3757,6 +3757,11 @@
 
       Fset_buffer (buffer);
     }
+  if (NILP (XBUFFER (buffer)->display_count))
+    XBUFFER (buffer)->display_count = make_int (1);
+  else
+    XBUFFER (buffer)->display_count = make_int (1 + XINT (XBUFFER (buffer)->display_count));
+  XBUFFER (buffer)->display_time = Fcurrent_time();
   return Qnil;
 }