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55535639 | 1 | ;;; underline.el --- insert/remove underlining (done by overstriking) in Emacs |
d501f516 | 2 | |
58142744 ER |
3 | ;; Copyright (C) 1985 Free Software Foundation, Inc. |
4 | ||
e5167999 | 5 | ;; Maintainer: FSF |
d7b4d18f | 6 | ;; Keywords: wp |
e5167999 | 7 | |
a2535589 JA |
8 | ;; This file is part of GNU Emacs. |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
a2535589 JA |
13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
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. | |
a2535589 | 24 | |
c91c4e6d ER |
25 | ;;; Commentary: |
26 | ||
27 | ;; This package deals with the primitive form of underlining | |
28 | ;; consisting of prefixing each character with "_\^h". The entry | |
29 | ;; point `underline-region' performs such underlining on a region. | |
30 | ;; The entry point `ununderline-region' removes it. | |
31 | ||
e5167999 | 32 | ;;; Code: |
a2535589 | 33 | |
f9f9507e | 34 | ;;;###autoload |
a2535589 JA |
35 | (defun underline-region (start end) |
36 | "Underline all nonblank characters in the region. | |
37 | Works by overstriking underscores. | |
38 | Called from program, takes two arguments START and END | |
39 | which specify the range to operate on." | |
8371c2f2 | 40 | (interactive "*r") |
a2535589 JA |
41 | (save-excursion |
42 | (let ((end1 (make-marker))) | |
43 | (move-marker end1 (max start end)) | |
44 | (goto-char (min start end)) | |
45 | (while (< (point) end1) | |
46 | (or (looking-at "[_\^@- ]") | |
af282089 | 47 | (insert "_\b")) |
a2535589 JA |
48 | (forward-char 1))))) |
49 | ||
f9f9507e | 50 | ;;;###autoload |
a2535589 JA |
51 | (defun ununderline-region (start end) |
52 | "Remove all underlining (overstruck underscores) in the region. | |
53 | Called from program, takes two arguments START and END | |
54 | which specify the range to operate on." | |
8371c2f2 | 55 | (interactive "*r") |
a2535589 JA |
56 | (save-excursion |
57 | (let ((end1 (make-marker))) | |
58 | (move-marker end1 (max start end)) | |
59 | (goto-char (min start end)) | |
af282089 | 60 | (while (re-search-forward "_\b\\|\b_" end1 t) |
a2535589 | 61 | (delete-char -2))))) |
d501f516 | 62 | |
896546cd RS |
63 | (provide 'underline) |
64 | ||
d501f516 | 65 | ;;; underline.el ends here |