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;;; inv-18.el --- invisible feature implementation for Emacs 18
;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Keywords: invisible, text-property, region, Emacs 18
;; This file is part of APEL (A Portable Emacs Library).
;; This program 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 later version.
;; This program 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 GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(require 'poe)
(defun enable-invisible ()
(make-local-variable 'original-selective-display)
(setq original-selective-display selective-display)
(setq selective-display t))
(defun disable-invisible ()
(setq selective-display
(and (boundp 'original-selective-display)
original-selective-display)))
(defalias 'end-of-invisible 'disable-invisible)
(make-obsolete 'end-of-invisible 'disable-invisible)
(defun invisible-region (start end)
(let ((buffer-read-only nil)
(modp (buffer-modified-p)))
(if (save-excursion
(goto-char (1- end))
(eq (following-char) ?\n))
(setq end (1- end)))
(unwind-protect
(subst-char-in-region start end ?\n ?\r t)
(set-buffer-modified-p modp))))
(defun visible-region (start end)
(let ((buffer-read-only nil)
(modp (buffer-modified-p)))
(unwind-protect
(subst-char-in-region start end ?\r ?\n t)
(set-buffer-modified-p modp))))
(defun invisible-p (pos)
(save-excursion
(goto-char pos)
(eq (following-char) ?\r)))
(defun next-visible-point (pos)
(save-excursion
(goto-char pos)
(end-of-line)
(if (eq (following-char) ?\n)
(forward-char))
(point)))
;;; @ end
;;;
(require 'product)
(product-provide (provide 'inv-18) (require 'apel-ver))
;;; inv-18.el ends here
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