1 ;;; inv-19.el --- invisible feature implementation for Emacs 19 or later
3 ;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Keywords: invisible, text-property, region, Emacs 19
8 ;; This file is part of APEL (A Portable Emacs Library).
10 ;; This program is free software; you can redistribute it and/or
11 ;; modify it under the terms of the GNU General Public License as
12 ;; published by the Free Software Foundation; either version 2, or (at
13 ;; your option) any later version.
15 ;; This program is distributed in the hope that it will be useful, but
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 (defmacro enable-invisible ())
29 (defmacro end-of-invisible ())
31 (defun invisible-region (start end)
34 (eq (following-char) ?\n)
38 (put-text-property start end 'invisible t)
41 (defun visible-region (start end)
42 (put-text-property start end 'invisible nil)
45 (defun invisible-p (pos)
46 (get-text-property pos 'invisible)
49 (defun next-visible-point (pos)
53 (eq (following-char) ?\n))
56 (or (next-single-property-change pos 'invisible)
65 ;;; inv-19.el ends here