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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