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Annotation of 43BSD/contrib/emacs/lisp/underline.el, revision 1.1.1.1

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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