/* X Communication module for terminals which understand the X protocol.
Copyright (C) 1986, 1988, 1993, 1994, 1996, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005 Free Software Foundation, Inc.
+ 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GNU Emacs.
static void
init_menu_items ()
{
+ if (!NILP (menu_items_inuse))
+ error ("Trying to use a menu from within a menu-entry");
+
if (NILP (menu_items))
{
menu_items_allocated = 60;
menu_items = Fmake_vector (make_number (menu_items_allocated), Qnil);
}
- if (!NILP (menu_items_inuse))
- error ("Trying to use a menu from within a menu-entry");
menu_items_inuse = Qt;
menu_items_used = 0;
menu_items_n_panes = 0;
xassert (NILP (menu_items_inuse));
}
+/* This undoes save_menu_items, and it is called by the specpdl unwind
+ mechanism. */
+
+static Lisp_Object
+restore_menu_items (saved)
+ Lisp_Object saved;
+{
+ menu_items = XCAR (saved);
+ menu_items_inuse = (! NILP (menu_items) ? Qt : Qnil);
+ menu_items_allocated = (VECTORP (menu_items) ? ASIZE (menu_items) : 0);
+ saved = XCDR (saved);
+ menu_items_used = XINT (XCAR (saved));
+ saved = XCDR (saved);
+ menu_items_n_panes = XINT (XCAR (saved));
+ saved = XCDR (saved);
+ menu_items_submenu_depth = XINT (XCAR (saved));
+ return Qnil;
+}
+
+/* Push the whole state of menu_items processing onto the specpdl.
+ It will be restored when the specpdl is unwound. */
+
+static void
+save_menu_items ()
+{
+ Lisp_Object saved = list4 (!NILP (menu_items_inuse) ? menu_items : Qnil,
+ make_number (menu_items_used),
+ make_number (menu_items_n_panes),
+ make_number (menu_items_submenu_depth));
+ record_unwind_protect (restore_menu_items, saved);
+ menu_items_inuse = Qnil;
+ menu_items = Qnil;
+}
+\f
/* Make the menu_items vector twice as large. */
static void
old = menu_items;
menu_items_allocated *= 2;
+
menu_items = Fmake_vector (make_number (menu_items_allocated), Qnil);
bcopy (XVECTOR (old)->contents, XVECTOR (menu_items)->contents,
old_size * sizeof (Lisp_Object));
xpos += XINT (x);
ypos += XINT (y);
+
+ XSETFRAME (Vmenu_updating_frame, f);
}
- Vmenu_updating_frame = Qnil;
+ else
+ Vmenu_updating_frame = Qnil;
#endif /* HAVE_MENUS */
record_unwind_protect (unuse_menu_items, Qnil);
int i;
int submenu_depth = 0;
widget_value **submenu_stack;
+ int panes_seen = 0;
submenu_stack
= (widget_value **) alloca (menu_items_used * sizeof (widget_value *));
Lisp_Object pane_name, prefix;
char *pane_string;
+ panes_seen++;
+
pane_name = XVECTOR (menu_items)->contents[i + MENU_ITEMS_PANE_NAME];
prefix = XVECTOR (menu_items)->contents[i + MENU_ITEMS_PANE_PREFIX];
wv->enabled = 1;
wv->button_type = BUTTON_TYPE_NONE;
wv->help = Qnil;
+ save_wv = wv;
}
- save_wv = wv;
+ else
+ save_wv = first_wv;
+
prev_wv = 0;
i += MENU_ITEMS_PANE_LENGTH;
}
Lisp_Object item_name, enable, descrip, def, type, selected;
Lisp_Object help;
+ /* All items should be contained in panes. */
+ if (panes_seen == 0)
+ abort ();
+
item_name = AREF (menu_items, i + MENU_ITEMS_ITEM_NAME);
enable = AREF (menu_items, i + MENU_ITEMS_ITEM_ENABLE);
descrip = AREF (menu_items, i + MENU_ITEMS_ITEM_EQUIV_KEY);
specbind (Qdebug_on_next_call, Qnil);
record_unwind_save_match_data ();
- record_unwind_protect (unuse_menu_items, Qnil);
if (NILP (Voverriding_local_map_menu_flag))
{
specbind (Qoverriding_terminal_local_map, Qnil);
/* Fill in menu_items with the current menu bar contents.
This can evaluate Lisp code. */
+ save_menu_items ();
+
menu_items = f->menu_bar_vector;
menu_items_allocated = VECTORP (menu_items) ? ASIZE (menu_items) : 0;
submenu_start = (int *) alloca (XVECTOR (items)->size * sizeof (int *));
}
set_buffer_internal_1 (prev);
- unbind_to (specpdl_count, Qnil);
/* If there has been no change in the Lisp-level contents
of the menu bar, skip redisplaying it. Just exit. */
+ /* Compare the new menu items with the ones computed last time. */
for (i = 0; i < previous_menu_items_used; i++)
if (menu_items_used == i
|| (!EQ (previous_items[i], XVECTOR (menu_items)->contents[i])))
break;
if (i == menu_items_used && i == previous_menu_items_used && i != 0)
{
+ /* The menu items have not changed. Don't bother updating
+ the menus in any form, since it would be a no-op. */
free_menubar_widget_value_tree (first_wv);
discard_menu_items ();
-
+ unbind_to (specpdl_count, Qnil);
return;
}
+ /* The menu items are different, so store them in the frame. */
+ f->menu_bar_vector = menu_items;
+ f->menu_bar_items_used = menu_items_used;
+
+ /* This calls restore_menu_items to restore menu_items, etc.,
+ as they were outside. */
+ unbind_to (specpdl_count, Qnil);
+
/* Now GC cannot happen during the lifetime of the widget_value,
so it's safe to store data from a Lisp_String. */
wv = first_wv->contents;
wv = wv->next;
}
- f->menu_bar_vector = menu_items;
- f->menu_bar_items_used = menu_items_used;
- discard_menu_items ();
}
else
{
return Qnil;
}
+ /* Don't GC while we prepare and show the menu,
+ because we give the oldxmenu library pointers to the
+ contents of strings. */
+ inhibit_garbage_collection ();
+
#ifdef HAVE_X_WINDOWS
/* Adjust coordinates to relative to the outer (window manager) window. */
x += FRAME_OUTER_TO_INNER_DIFF_X (f);