/* Set up data in menu_items for a menu bar item
whose event type is ITEM_KEY (with string ITEM_NAME)
and whose contents come from the list of keymaps MAPS. */
bool
parse_single_submenu (Lisp_Object item_key, Lisp_Object item_name,
Lisp_Object maps)
{
Lisp_Object length;
EMACS_INT len;
Lisp_Object *mapvec;
ptrdiff_t i;
bool top_level_items = 0;
USE_SAFE_ALLOCA;
length = Flength (maps);
len = XINT (length);
/* Convert the list MAPS into a vector MAPVEC. */
SAFE_ALLOCA_LISP (mapvec, len);
for (i = 0; i < len; i++)
{
mapvec[i] = Fcar (maps);
maps = Fcdr (maps);
}
/* Loop over the given keymaps, making a pane for each map.
But don't make a pane that is empty--ignore that map instead. */
for (i = 0; i < len; i++)
{
if (!KEYMAPP (mapvec[i]))
{
/* Here we have a command at top level in the menu bar
as opposed to a submenu. */
top_level_items = 1;
push_menu_pane (Qnil, Qnil);
push_menu_item (item_name, Qt, item_key, mapvec[i],
Qnil, Qnil, Qnil, Qnil);
}
else
{
Lisp_Object prompt;
prompt = Fkeymap_prompt (mapvec[i]);
single_keymap_panes (mapvec[i],
!NILP (prompt) ? prompt : item_name,
item_key, 10);
}
}
SAFE_FREE ();
return top_level_items;
}
static emacs_value
module_funcall (emacs_env *env, emacs_value fun, ptrdiff_t nargs,
emacs_value args[])
{
MODULE_FUNCTION_BEGIN (module_nil);
/* Make a new Lisp_Object array starting with the function as the
first arg, because that's what Ffuncall takes. */
Lisp_Object *newargs;
USE_SAFE_ALLOCA;
SAFE_ALLOCA_LISP (newargs, nargs + 1);
newargs[0] = value_to_lisp (fun);
for (ptrdiff_t i = 0; i < nargs; i++)
newargs[1 + i] = value_to_lisp (args[i]);
emacs_value result = lisp_to_value (Ffuncall (nargs + 1, newargs));
SAFE_FREE ();
return result;
}
/* As above, but return the menu selection instead of storing in kb buffer.
If KEYMAPS, return full prefixes to selection. */
Lisp_Object
find_and_return_menu_selection (struct frame *f, bool keymaps, void *client_data)
{
Lisp_Object prefix, entry;
int i;
Lisp_Object *subprefix_stack;
int submenu_depth = 0;
USE_SAFE_ALLOCA;
prefix = entry = Qnil;
i = 0;
SAFE_ALLOCA_LISP (subprefix_stack, menu_items_used);
while (i < menu_items_used)
{
if (EQ (AREF (menu_items, i), Qnil))
{
subprefix_stack[submenu_depth++] = prefix;
prefix = entry;
i++;
}
else if (EQ (AREF (menu_items, i), Qlambda))
{
prefix = subprefix_stack[--submenu_depth];
i++;
}
else if (EQ (AREF (menu_items, i), Qt))
{
prefix
= AREF (menu_items, i + MENU_ITEMS_PANE_PREFIX);
i += MENU_ITEMS_PANE_LENGTH;
}
/* Ignore a nil in the item list.
It's meaningful only for dialog boxes. */
else if (EQ (AREF (menu_items, i), Qquote))
i += 1;
else
{
entry
= AREF (menu_items, i + MENU_ITEMS_ITEM_VALUE);
if (aref_addr (menu_items, i) == client_data)
{
if (keymaps)
{
int j;
entry = list1 (entry);
if (!NILP (prefix))
entry = Fcons (prefix, entry);
for (j = submenu_depth - 1; j >= 0; j--)
if (!NILP (subprefix_stack[j]))
entry = Fcons (subprefix_stack[j], entry);
}
SAFE_FREE ();
return entry;
}
i += MENU_ITEMS_ITEM_LENGTH;
}
}
SAFE_FREE ();
return Qnil;
}