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1 | ;;; misc.el --- basic editing commands for Emacs |
2 | ||
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3 | ;; Copyright (C) 1989 Free Software Foundation, Inc. |
4 | ||
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5 | ;; Maintainer: FSF |
6 | ||
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7 | ;; This file is part of GNU Emacs. |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 11 | ;; the Free Software Foundation; either version 2, or (at your option) |
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12 | ;; any later version. |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
21 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
e5167999 | 23 | ;;; Code: |
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24 | |
25 | (defun copy-from-above-command (&optional arg) | |
26 | "Copy characters from previous nonblank line, starting just above point. | |
27 | Copy ARG characters, but not past the end of that line. | |
28 | If no argument given, copy the entire rest of the line. | |
29 | The characters copied are inserted in the buffer before point." | |
30 | (interactive "P") | |
31 | (let ((cc (current-column)) | |
32 | n | |
33 | (string "")) | |
34 | (save-excursion | |
35 | (beginning-of-line) | |
36 | (backward-char 1) | |
37 | (skip-chars-backward "\ \t\n") | |
38 | (move-to-column cc) | |
39 | ;; Default is enough to copy the whole rest of the line. | |
40 | (setq n (if arg (prefix-numeric-value arg) (point-max))) | |
41 | ;; If current column winds up in middle of a tab, | |
42 | ;; copy appropriate number of "virtual" space chars. | |
43 | (if (< cc (current-column)) | |
44 | (if (= (preceding-char) ?\t) | |
45 | (progn | |
46 | (setq string (make-string (min n (- (current-column) cc)) ?\ )) | |
47 | (setq n (- n (min n (- (current-column) cc))))) | |
48 | ;; In middle of ctl char => copy that whole char. | |
49 | (backward-char 1))) | |
50 | (setq string (concat string | |
51 | (buffer-substring | |
52 | (point) | |
53 | (min (save-excursion (end-of-line) (point)) | |
54 | (+ n (point))))))) | |
55 | (insert string))) | |
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56 | |
57 | ;;; misc.el ends here |