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1 ;;; misc.el --- miscellaneous functions for XEmacs
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2
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3 ;; Copyright (C) 1989 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: FSF
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software; you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; XEmacs is distributed in the hope that it will be useful, but
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15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ;; General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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21 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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22
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23 ;;; Synched up with: FSF 19.30.
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24
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25 ;;; Code:
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26
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27 (defun copy-from-above-command (&optional arg)
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28 "Copy characters from previous nonblank line, starting just above point.
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29 Copy ARG characters, but not past the end of that line.
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30 If no argument given, copy the entire rest of the line.
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31 The characters copied are inserted in the buffer before point."
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32 (interactive "P")
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33 (let ((cc (current-column))
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34 n
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35 (string ""))
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36 (save-excursion
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37 (beginning-of-line)
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38 (backward-char 1)
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39 (skip-chars-backward "\ \t\n")
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40 (move-to-column cc)
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41 ;; Default is enough to copy the whole rest of the line.
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42 (setq n (if arg (prefix-numeric-value arg) (point-max)))
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43 ;; If current column winds up in middle of a tab,
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44 ;; copy appropriate number of "virtual" space chars.
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45 (if (< cc (current-column))
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46 (if (= (preceding-char) ?\t)
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47 (progn
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48 (setq string (make-string (min n (- (current-column) cc)) ?\ ))
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49 (setq n (- n (min n (- (current-column) cc)))))
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50 ;; In middle of ctl char => copy that whole char.
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51 (backward-char 1)))
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52 (setq string (concat string
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53 (buffer-substring
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54 (point)
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55 (min (save-excursion (end-of-line) (point))
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56 (+ n (point)))))))
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57 (insert string)))
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58
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59 ;;; misc.el ends here
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