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Annotation of 43BSD/contrib/emacs/lisp/underline.el, revision 1.1

1.1     ! root        1: ;; Insert or remove underlining (done by overstriking) in Emacs.
        !             2: ;; Copyright (C) 1985 Richard M. Stallman.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: 
        !            22: (defun underline-region (start end)
        !            23:   "Underline all nonblank characters in the region.
        !            24: Works by overstriking underscores.
        !            25: Called from program, takes two arguments START and END
        !            26: which specify the range to operate on."
        !            27:   (interactive "r")
        !            28:   (save-excursion
        !            29:    (let ((end1 (make-marker)))
        !            30:      (move-marker end1 (max start end))
        !            31:      (goto-char (min start end))
        !            32:      (while (< (point) end1)
        !            33:        (or (looking-at "[_\^@- ]")
        !            34:           (insert "_"))
        !            35:        (forward-char 1)))))
        !            36: 
        !            37: (defun ununderline-region (start end)
        !            38:   "Remove allunderlining (overstruck underscores) in the region.
        !            39: Called from program, takes two arguments START and END
        !            40: which specify the range to operate on."
        !            41:   (interactive "r")
        !            42:   (save-excursion
        !            43:    (let ((end1 (make-marker)))
        !            44:      (move-marker end1 (max start end))
        !            45:      (goto-char (min start end))
        !            46:      (while (search-forward "_" end1 t)
        !            47:        (delete-char -2)))))

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