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63 lines
2.1 KiB
EmacsLisp
63 lines
2.1 KiB
EmacsLisp
;;; underline.el --- insert/remove underlining (done by overstriking) in Emacs.
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;; Copyright (C) 1985 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: wp
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;; This package deals with the primitive form of underlining
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;; consisting of prefixing each character with "_\^h". The entry
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;; point `underline-region' performs such underlining on a region.
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;; The entry point `ununderline-region' removes it.
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;;; Code:
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;;;###autoload
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(defun underline-region (start end)
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"Underline all nonblank characters in the region.
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Works by overstriking underscores.
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Called from program, takes two arguments START and END
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which specify the range to operate on."
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(interactive "r")
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(save-excursion
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(let ((end1 (make-marker)))
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(move-marker end1 (max start end))
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(goto-char (min start end))
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(while (< (point) end1)
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(or (looking-at "[_\^@- ]")
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(insert "_\b"))
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(forward-char 1)))))
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;;;###autoload
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(defun ununderline-region (start end)
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"Remove all underlining (overstruck underscores) in the region.
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Called from program, takes two arguments START and END
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which specify the range to operate on."
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(interactive "r")
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(save-excursion
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(let ((end1 (make-marker)))
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(move-marker end1 (max start end))
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(goto-char (min start end))
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(while (re-search-forward "_\b\\|\b_" end1 t)
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(delete-char -2)))))
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;;; underline.el ends here
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