NumNode * eval(Node * a)
{
switch (a->type) {
case E : return Eeval(a);
case E1 : return E1eval(a);
case T : return Teval(a);
case T1 : return T1eval(a);
case F : return Feval(a);
default : return TerminalEval(a);
}
}
/* This does the dirty work. gc_currently_forbidden is 1 when this is called.
*/
int
button_item_to_widget_value(Lisp_Object gui_object_instance,
Lisp_Object gui_item, widget_value * wv,
int allow_text_field_p, int no_keys_p,
int menu_entry_p, int accel_p)
{
/* This function cannot GC because gc_currently_forbidden is set when
it's called */
Lisp_Gui_Item *pgui = 0;
/* degenerate case */
if (STRINGP(gui_item)) {
wv->type = TEXT_TYPE;
if (accel_p)
wv->name = add_accel_and_to_external(gui_item);
else
LISP_STRING_TO_EXTERNAL_MALLOC(gui_item, wv->name,
Qlwlib_encoding);
return 1;
} else if (!GUI_ITEMP(gui_item))
syntax_error("need a string or a gui_item here", gui_item);
pgui = XGUI_ITEM(gui_item);
if (!NILP(pgui->filter))
syntax_error(":filter keyword not permitted on leaf nodes",
gui_item);
#ifdef HAVE_MENUBARS
if (menu_entry_p
&& !gui_item_included_p(gui_item, Vmenubar_configuration)) {
/* the include specification says to ignore this item. */
return 0;
}
#endif /* HAVE_MENUBARS */
if (!STRINGP(pgui->name))
pgui->name = Feval(pgui->name);
CHECK_STRING(pgui->name);
if (accel_p) {
Lisp_Object tmp = gui_item_accelerator(gui_item);
wv->name = add_accel_and_to_external(pgui->name);
wv->accel = LISP_TO_VOID(tmp);
} else {
LISP_STRING_TO_EXTERNAL_MALLOC(pgui->name, wv->name,
Qlwlib_encoding);
wv->accel = LISP_TO_VOID(Qnil);
}
if (!NILP(pgui->suffix)) {
Lisp_Object suffix2;
/* Shortcut to avoid evaluating suffix each time */
if (STRINGP(pgui->suffix))
suffix2 = pgui->suffix;
else {
suffix2 = Feval(pgui->suffix);
CHECK_STRING(suffix2);
}
LISP_STRING_TO_EXTERNAL_MALLOC(suffix2, wv->value,
Qlwlib_encoding);
}
wv_set_evalable_slot(wv->enabled, pgui->active);
wv_set_evalable_slot(wv->selected, pgui->selected);
if (!NILP(pgui->callback) || !NILP(pgui->callback_ex)) {
Lisp_Object tmp = cons3(gui_object_instance,
pgui->callback, pgui->callback_ex);
wv->call_data = LISP_TO_VOID(tmp);
}
if (no_keys_p
#ifdef HAVE_MENUBARS
|| (menu_entry_p && !menubar_show_keybindings)
#endif
) {
wv->key = 0;
} else if (!NILP(pgui->keys)) {
/* Use this string to generate key bindings */
CHECK_STRING(pgui->keys);
pgui->keys = Fsubstitute_command_keys(pgui->keys);
if (XSTRING_LENGTH(pgui->keys) > 0)
LISP_STRING_TO_EXTERNAL_MALLOC(pgui->keys, wv->key,
Qlwlib_encoding);
else
wv->key = 0;
} else if (SYMBOLP(pgui->callback)) { /* Show the binding of this command. */
char buf[1024]; /* #### */
/* #### Warning, dependency here on current_buffer and point */
where_is_to_char(pgui->callback, buf);
if (buf[0])
C_STRING_TO_EXTERNAL_MALLOC(buf, wv->key,
Qlwlib_encoding);
else
wv->key = 0;
}
CHECK_SYMBOL(pgui->style);
if (NILP(pgui->style)) {
Bufbyte *intname = NULL;
Bytecount intlen;
/* If the callback is nil, treat this item like unselectable text.
This way, dashes will show up as a separator. */
if (!wv->enabled)
wv->type = BUTTON_TYPE;
TO_INTERNAL_FORMAT(C_STRING, wv->name,
ALLOCA, (intname, intlen), Qlwlib_encoding);
if (intname != NULL && separator_string_p(intname)) {
wv->type = SEPARATOR_TYPE;
wv->value =
menu_separator_style_and_to_external(intname);
} else {
#if 0
/* #### - this is generally desirable for menubars, but it breaks
a package that uses dialog boxes and next_command_event magic
to use the callback slot in dialog buttons for data instead of
a real callback.
Code is data, right? The beauty of LISP abuse. --Stig */
if (NILP(callback))
wv->type = TEXT_TYPE;
else
#endif
wv->type = BUTTON_TYPE;
}
} else if (EQ(pgui->style, Qbutton))
wv->type = BUTTON_TYPE;
else if (EQ(pgui->style, Qtoggle))
wv->type = TOGGLE_TYPE;
else if (EQ(pgui->style, Qradio))
wv->type = RADIO_TYPE;
else if (EQ(pgui->style, Qtext)) {
wv->type = TEXT_TYPE;
#if 0
wv->value = wv->name;
wv->name = "value";
#endif
} else
syntax_error_2("Unknown style", pgui->style, gui_item);
if (!allow_text_field_p && (wv->type == TEXT_TYPE))
syntax_error("Text field not allowed in this context",
gui_item);
if (!NILP(pgui->selected) && EQ(pgui->style, Qtext))
syntax_error
(":selected only makes sense with :style toggle, radio or button",
gui_item);
return 1;
}
