/* Primitives for work of the "widget" library.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of XEmacs.
XEmacs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
XEmacs is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with XEmacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Synched up with: Not in FSF. */
/* In an ideal world, this file would not have been necessary.
However, elisp function calls being as slow as they are, it turns
out that some functions in the widget library (wid-edit.el) are the
bottleneck of Widget operation. Here is their translation to C,
for the sole reason of efficiency. */
DEFUN ("widget-plist-member", Fwidget_plist_member, 2, 2, 0, /*
Like `plist-get', but returns the tail of PLIST whose car is PROP.
while (!NILP (plist) && !EQ (Fcar (plist), prop))
/* Check for QUIT, so a circular plist doesn't lock up the
plist = Fcdr (Fcdr (plist));
DEFUN ("widget-put", Fwidget_put, 3, 3, 0, /*
In WIDGET set PROPERTY to VALUE.
The value can later be retrieved with `widget-get'.
(widget, property, value))
XCDR (widget) = Fplist_put (XCDR (widget), property, value);
DEFUN ("widget-get", Fwidget_get, 2, 2, 0, /*
In WIDGET, get the value of PROPERTY.
The value could either be specified when the widget was created, or
later with `widget-put'.
Lisp_Object value = Qnil;
Lisp_Object tmp = Fwidget_plist_member (Fcdr (widget), property);
if (!NILP (tmp))
value = Fcar (Fcdr (tmp));
tmp = Fcar (widget);
if (!NILP (tmp))
widget = Fget (tmp, Qwidget_type, Qnil);
DEFUN ("widget-apply", Fwidget_apply, 2, MANY, 0, /*
Apply the value of WIDGET's PROPERTY to the widget itself.
ARGS are passed as extra arguments to the function.
(int nargs, Lisp_Object *args))
/* This function can GC */
struct gcpro gcpro1;
newargs = Fwidget_get (args, args);
newargs = args;
newargs = Flist (nargs - 2, args + 2);
RETURN_UNGCPRO (Fapply (3, newargs));
defsymbol (&Qwidget_type, "widget-type");