;;; tabify.el --- tab conversion commands for Emacs
-;; Copyright (C) 1985, 1994, 2001, 2002, 2003, 2004,
-;; 2005, 2006, 2007 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1994, 2001-2016 Free Software Foundation, Inc.
-;; Maintainer: FSF
+;; Maintainer: emacs-devel@gnu.org
+;; Package: emacs
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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 3, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, 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
;; 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., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
;;;###autoload
-(defun untabify (start end)
+(defun untabify (start end &optional _arg)
"Convert all tabs in region to multiple spaces, preserving columns.
+If called interactively with prefix ARG, convert for the entire
+buffer.
+
Called non-interactively, the region is specified by arguments
START and END, rather than by the position of point and mark.
The variable `tab-width' controls the spacing of tab stops."
- (interactive "r")
- (save-excursion
- (save-restriction
- (narrow-to-region (point-min) end)
- (goto-char start)
- (while (search-forward "\t" nil t) ; faster than re-search
- (forward-char -1)
- (let ((tab-beg (point))
- (indent-tabs-mode nil)
- column)
- (skip-chars-forward "\t")
- (setq column (current-column))
- (delete-region tab-beg (point))
- (indent-to column))))))
+ (interactive (if current-prefix-arg
+ (list (point-min) (point-max) current-prefix-arg)
+ (list (region-beginning) (region-end) nil)))
+ (let ((c (current-column)))
+ (save-excursion
+ (save-restriction
+ (narrow-to-region (point-min) end)
+ (goto-char start)
+ (while (search-forward "\t" nil t) ; faster than re-search
+ (forward-char -1)
+ (let ((tab-beg (point))
+ (indent-tabs-mode nil)
+ column)
+ (skip-chars-forward "\t")
+ (setq column (current-column))
+ (delete-region tab-beg (point))
+ (indent-to column)))))
+ (move-to-column c)))
(defvar tabify-regexp " [ \t]+"
"Regexp matching whitespace that tabify should consider.
\"^\\t* [ \\t]+\" is also useful, for tabifying only initial whitespace.")
;;;###autoload
-(defun tabify (start end)
+(defun tabify (start end &optional _arg)
"Convert multiple spaces in region to tabs when possible.
A group of spaces is partially replaced by tabs
when this can be done without changing the column they end at.
+If called interactively with prefix ARG, convert for the entire
+buffer.
+
Called non-interactively, the region is specified by arguments
START and END, rather than by the position of point and mark.
The variable `tab-width' controls the spacing of tab stops."
- (interactive "r")
+ (interactive (if current-prefix-arg
+ (list (point-min) (point-max) current-prefix-arg)
+ (list (region-beginning) (region-end) nil)))
(save-excursion
(save-restriction
;; Include the beginning of the line in the narrowing
(provide 'tabify)
-;; arch-tag: c83893b1-e0cc-4e57-8a09-73fd03466416
;;; tabify.el ends here