[bpt/emacs.git] / lisp / misc.el

;;; misc.el --- some nonstandard basic editing commands for Emacs

;; Copyright (C) 1989 Free Software Foundation, Inc.

;; Maintainer: FSF
;; Keywords: convenience

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; Code:

(defun copy-from-above-command (&optional arg)
  "Copy characters from previous nonblank line, starting just above point.
Copy ARG characters, but not past the end of that line.
If no argument given, copy the entire rest of the line.
The characters copied are inserted in the buffer before point."
  (interactive "P")
  (let ((cc (current-column))
	n
	(string ""))
    (save-excursion
      (beginning-of-line)
      (backward-char 1)
      (skip-chars-backward "\ \t\n")
      (move-to-column cc)
      ;; Default is enough to copy the whole rest of the line.
      (setq n (if arg (prefix-numeric-value arg) (point-max)))
      ;; If current column winds up in middle of a tab,
      ;; copy appropriate number of "virtual" space chars.
      (if (< cc (current-column))
	  (if (= (preceding-char) ?\t)
	      (progn
		(setq string (make-string (min n (- (current-column) cc)) ?\ ))
		(setq n (- n (min n (- (current-column) cc)))))
	    ;; In middle of ctl char => copy that whole char.
	    (backward-char 1)))
      (setq string (concat string
			   (buffer-substring
			    (point)
			    (min (save-excursion (end-of-line) (point))
				 (+ n (point)))))))
    (insert string)))

(provide 'misc)

;;; misc.el ends here
Commit	Line	Data
896546cd	1	;;; misc.el --- some nonstandard basic editing commands for Emacs
6594deb0	2
0d20f9a0 JB	3	;; Copyright (C) 1989 Free Software Foundation, Inc.
0d20f9a0 JB	4
9750e079	5	;; Maintainer: FSF
30764597	6	;; Keywords: convenience
9750e079	7
0d20f9a0 JB	8	;; This file is part of GNU Emacs.
	9
	10	;; GNU Emacs is free software; you can redistribute it and/or modify
	11	;; it under the terms of the GNU General Public License as published by
e5167999	12	;; the Free Software Foundation; either version 2, or (at your option)
0d20f9a0 JB	13	;; any later version.
	14
	15	;; GNU Emacs is distributed in the hope that it will be useful,
	16	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	;; GNU General Public License for more details.
	19
	20	;; You should have received a copy of the GNU General Public License
b578f267 EN	21	;; along with GNU Emacs; see the file COPYING. If not, write to the
	22	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	23	;; Boston, MA 02111-1307, USA.
0d20f9a0	24
55535639 PJ	25	;;; Commentary:
55535639 PJ	26
e5167999	27	;;; Code:
0d20f9a0 JB	28
	29	(defun copy-from-above-command (&optional arg)
	30	"Copy characters from previous nonblank line, starting just above point.
	31	Copy ARG characters, but not past the end of that line.
	32	If no argument given, copy the entire rest of the line.
	33	The characters copied are inserted in the buffer before point."
	34	(interactive "P")
	35	(let ((cc (current-column))
	36	n
	37	(string ""))
	38	(save-excursion
	39	(beginning-of-line)
	40	(backward-char 1)
	41	(skip-chars-backward "\ \t\n")
	42	(move-to-column cc)
	43	;; Default is enough to copy the whole rest of the line.
	44	(setq n (if arg (prefix-numeric-value arg) (point-max)))
	45	;; If current column winds up in middle of a tab,
	46	;; copy appropriate number of "virtual" space chars.
	47	(if (< cc (current-column))
	48	(if (= (preceding-char) ?\t)
	49	(progn
	50	(setq string (make-string (min n (- (current-column) cc)) ?\ ))
	51	(setq n (- n (min n (- (current-column) cc)))))
	52	;; In middle of ctl char => copy that whole char.
	53	(backward-char 1)))
	54	(setq string (concat string
	55	(buffer-substring
	56	(point)
	57	(min (save-excursion (end-of-line) (point))
	58	(+ n (point)))))))
	59	(insert string)))
6594deb0	60
896546cd RS	61	(provide 'misc)
896546cd RS	62
6594deb0	63	;;; misc.el ends here