Lisp_Object Qmenu_select;
Lisp_Object Qmenu_escape;
+Lisp_Object Qself_insert_defer_undo;
+
/* this is in keymap.c */
extern Lisp_Object Fmake_keymap (Lisp_Object name);
static void
menu_move_up (void)
{
- widget_value *current, *prev;
- widget_value *entries;
+ widget_value *current = lw_get_entries (False);
+ widget_value *entries = lw_get_entries (True);
+ widget_value *prev = NULL;
- current = lw_get_entries (False);
- entries = lw_get_entries (True);
- prev = NULL;
- if (current != entries)
+ while (entries != current)
{
- while (entries != current)
- {
- if (entries->name /*&& entries->enabled*/) prev = entries;
- entries = entries->next;
- assert (entries);
- }
+ if (entries->name /*&& entries->enabled*/) prev = entries;
+ entries = entries->next;
+ assert (entries);
}
if (!prev)
static void
menu_move_down (void)
{
- widget_value *current;
- widget_value *new;
-
- current = lw_get_entries (False);
- new = current;
+ widget_value *current = lw_get_entries (False);
+ widget_value *new = current;
while (new->next)
{
int l = level;
widget_value *current;
- while (level >= 3)
- {
- --level;
- lw_pop_menu ();
- }
+ while (level-- >= 3)
+ lw_pop_menu ();
+
menu_move_up ();
current = lw_get_entries (False);
if (l > 2 && current->contents)
int l = level;
widget_value *current;
- while (level >= 3)
- {
- --level;
- lw_pop_menu ();
- }
+ while (level-- >= 3)
+ lw_pop_menu ();
+
menu_move_down ();
current = lw_get_entries (False);
if (l > 2 && current->contents)
}
else /* key sequence is bound to a command */
{
+ int magic_undo = 0;
+ int magic_undo_count = 20;
+
Vthis_command = leaf;
+
/* Don't push an undo boundary if the command set the prefix arg,
or if we are executing a keyboard macro, or if in the
minibuffer. If the command we are about to execute is
self-insert, it's tricky: up to 20 consecutive self-inserts may
be done without an undo boundary. This counter is reset as
soon as a command other than self-insert-command is executed.
- */
- if (! EQ (leaf, Qself_insert_command))
+
+ Programmers can also use the `self-insert-undo-magic'
+ property to install that behaviour on functions other
+ than `self-insert-command', or to change the magic
+ number 20 to something else. */
+
+ if (SYMBOLP (leaf))
+ {
+ Lisp_Object prop = Fget (leaf, Qself_insert_defer_undo, Qnil);
+ if (NATNUMP (prop))
+ magic_undo = 1, magic_undo_count = XINT (prop);
+ else if (!NILP (prop))
+ magic_undo = 1;
+ else if (EQ (leaf, Qself_insert_command))
+ magic_undo = 1;
+ }
+
+ if (!magic_undo)
command_builder->self_insert_countdown = 0;
if (NILP (XCONSOLE (console)->prefix_arg)
&& NILP (Vexecuting_macro)
&& command_builder->self_insert_countdown == 0)
Fundo_boundary ();
- if (EQ (leaf, Qself_insert_command))
+ if (magic_undo)
{
if (--command_builder->self_insert_countdown < 0)
- command_builder->self_insert_countdown = 20;
+ command_builder->self_insert_countdown = magic_undo_count;
}
execute_command_event
(command_builder,
Calling this function directs the translated event to replace
the original event, so that only one version of the event actually
-appears in the echo area and in the value of `this-command-keys.'.
+appears in the echo area and in the value of `this-command-keys'.
*/
())
{
{
Emchar ch = XCHAR (keysym);
Bufbyte str[MAX_EMCHAR_LEN];
- Bytecount len;
-
- len = set_charptr_emchar (str, ch);
+ Bytecount len = set_charptr_emchar (str, ch);
Lstream_write (XLSTREAM (Vdribble_file), str, len);
}
else if (string_char_length (XSYMBOL (keysym)->name) == 1)
defsymbol (&Qmenu_select, "menu-select");
defsymbol (&Qmenu_escape, "menu-escape");
+ defsymbol (&Qself_insert_defer_undo, "self-insert-defer-undo");
defsymbol (&Qcancel_mode_internal, "cancel-mode-internal");
}