; Merge branch 'fix/no-undo-boundary-on-secondary-buffer-change'

Conflicts:
	src/cmds.c
	src/keyboard.c

1 files changed, 14 insertions, 42 deletions

diff --git a/src/cmds.c b/src/cmds.c
index 0afc023e681..167ebb74302 100644
--- a/src/cmds.c
+++ b/src/cmds.c
@@ -218,36 +218,6 @@ to t.  */)
   return Qnil;
 }
 
-static int nonundocount;
-
-static void
-remove_excessive_undo_boundaries (void)
-{
-  bool remove_boundary = true;
-
-  if (!EQ (Vthis_command, KVAR (current_kboard, Vlast_command)))
-    nonundocount = 0;
-
-  if (NILP (Vexecuting_kbd_macro))
-    {
-      if (nonundocount <= 0 || nonundocount >= 20)
-	{
-	  remove_boundary = false;
-	  nonundocount = 0;
-	}
-      nonundocount++;
-    }
-
-  if (remove_boundary
-      && CONSP (BVAR (current_buffer, undo_list))
-      && NILP (XCAR (BVAR (current_buffer, undo_list)))
-      /* Only remove auto-added boundaries, not boundaries
-	 added by explicit calls to undo-boundary.  */
-      && EQ (BVAR (current_buffer, undo_list), last_undo_boundary))
-    /* Remove the undo_boundary that was just pushed.  */
-    bset_undo_list (current_buffer, XCDR (BVAR (current_buffer, undo_list)));
-}
-
 DEFUN ("delete-char", Fdelete_char, Sdelete_char, 1, 2, "p\nP",
        doc: /* Delete the following N characters (previous if N is negative).
 Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).
@@ -263,7 +233,7 @@ because it respects values of `delete-active-region' and `overwrite-mode'.  */)
   CHECK_NUMBER (n);
 
   if (eabs (XINT (n)) < 2)
-    remove_excessive_undo_boundaries ();
+    call0 (Qundo_auto__amalgamate);
 
   pos = PT + XINT (n);
   if (NILP (killflag))
@@ -309,20 +279,19 @@ At the end, it runs `post-self-insert-hook'.  */)
     error ("Negative repetition argument %"pI"d", XINT (n));
 
   if (XFASTINT (n) < 2)
-    remove_excessive_undo_boundaries ();
+    call0 (Qundo_auto__amalgamate);
 
   /* Barf if the key that invoked this was not a character.  */
   if (!CHARACTERP (last_command_event))
     bitch_at_user ();
-  else
-    {
-      int character = translate_char (Vtranslation_table_for_input,
-				      XINT (last_command_event));
-      int val = internal_self_insert (character, XFASTINT (n));
-      if (val == 2)
-	nonundocount = 0;
-      frame_make_pointer_invisible (SELECTED_FRAME ());
-    }
+  else {
+    int character = translate_char (Vtranslation_table_for_input,
+				    XINT (last_command_event));
+    int val = internal_self_insert (character, XFASTINT (n));
+    if (val == 2)
+      Fset (Qundo_auto__this_command_amalgamating, Qnil);
+    frame_make_pointer_invisible (SELECTED_FRAME ());
+  }
 
   return Qnil;
 }
@@ -525,6 +494,10 @@ internal_self_insert (int c, EMACS_INT n)
 void
 syms_of_cmds (void)
 {
+  DEFSYM (Qundo_auto__amalgamate, "undo-auto--amalgamate");
+  DEFSYM (Qundo_auto__this_command_amalgamating,
+          "undo-auto--this-command-amalgamating");
+
   DEFSYM (Qkill_forward_chars, "kill-forward-chars");
 
   /* A possible value for a buffer's overwrite-mode variable.  */
@@ -554,7 +527,6 @@ keys_of_cmds (void)
 {
   int n;
 
-  nonundocount = 0;
   initial_define_key (global_map, Ctl ('I'), "self-insert-command");
   for (n = 040; n < 0177; n++)
     initial_define_key (global_map, n, "self-insert-command");