[7238] | 1 | ;;; inv-18.el --- invisible feature implementation for Emacs 18 |
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| 2 | |
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| 3 | ;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
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| 4 | |
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| 5 | ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp> |
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| 6 | ;; Keywords: invisible, text-property, region, Emacs 18 |
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| 7 | |
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| 8 | ;; This file is part of APEL (A Portable Emacs Library). |
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| 9 | |
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| 10 | ;; This program is free software; you can redistribute it and/or |
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| 11 | ;; modify it under the terms of the GNU General Public License as |
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| 12 | ;; published by the Free Software Foundation; either version 2, or (at |
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| 13 | ;; your option) any later version. |
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| 14 | |
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| 15 | ;; This program is distributed in the hope that it will be useful, but |
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| 16 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | ;; General Public License for more details. |
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| 19 | |
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| 20 | ;; You should have received a copy of the GNU General Public License |
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| 21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
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| 22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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| 23 | ;; Boston, MA 02111-1307, USA. |
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| 24 | |
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| 25 | ;;; Code: |
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| 26 | |
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| 27 | (require 'poe) |
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| 28 | |
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| 29 | (defun enable-invisible () |
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| 30 | (make-local-variable 'original-selective-display) |
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| 31 | (setq original-selective-display selective-display) |
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| 32 | (setq selective-display t)) |
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| 33 | |
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| 34 | (defun disable-invisible () |
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| 35 | (setq selective-display |
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| 36 | (and (boundp 'original-selective-display) |
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| 37 | original-selective-display))) |
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| 38 | (defalias 'end-of-invisible 'disable-invisible) |
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| 39 | (make-obsolete 'end-of-invisible 'disable-invisible) |
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| 40 | |
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| 41 | (defun invisible-region (start end) |
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| 42 | (let ((buffer-read-only nil) |
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| 43 | (modp (buffer-modified-p))) |
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| 44 | (if (save-excursion |
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| 45 | (goto-char (1- end)) |
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| 46 | (eq (following-char) ?\n)) |
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| 47 | (setq end (1- end))) |
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| 48 | (unwind-protect |
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| 49 | (subst-char-in-region start end ?\n ?\r t) |
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| 50 | (set-buffer-modified-p modp)))) |
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| 51 | |
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| 52 | (defun visible-region (start end) |
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| 53 | (let ((buffer-read-only nil) |
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| 54 | (modp (buffer-modified-p))) |
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| 55 | (unwind-protect |
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| 56 | (subst-char-in-region start end ?\r ?\n t) |
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| 57 | (set-buffer-modified-p modp)))) |
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| 58 | |
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| 59 | (defun invisible-p (pos) |
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| 60 | (save-excursion |
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| 61 | (goto-char pos) |
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| 62 | (eq (following-char) ?\r))) |
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| 63 | |
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| 64 | (defun next-visible-point (pos) |
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| 65 | (save-excursion |
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| 66 | (goto-char pos) |
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| 67 | (end-of-line) |
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| 68 | (if (eq (following-char) ?\n) |
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| 69 | (forward-char)) |
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| 70 | (point))) |
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| 71 | |
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| 72 | |
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| 73 | ;;; @ end |
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| 74 | ;;; |
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| 75 | |
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| 76 | (require 'product) |
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| 77 | (product-provide (provide 'inv-18) (require 'apel-ver)) |
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| 78 | |
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| 79 | ;;; inv-18.el ends here |
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