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bc511a64f6
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
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, 2001-2017 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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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 3 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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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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(provide 'underline)
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;;; underline.el ends here
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