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- ;;; tabify.el --- tab conversion commands for XEmacs
-
- ;; Copyright (C) 1985, 1994 Free Software Foundation, Inc.
-
- ;; Maintainer: FSF
-
- ;; This file is part of XEmacs.
-
- ;; XEmacs 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.
-
- ;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
- ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- ;; 02111-1307, USA.
-
- ;;; Synched up with: FSF 19.34.
-
- ;;; Commentary:
-
- ;; Commands to optimize spaces to tabs or expand tabs to spaces in a region
- ;; (`tabify' and `untabify'). The variable tab-width does the obvious.
-
- ;;; Code:
-
- ;;;###autoload
- (defun untabify (start end)
- "Convert all tabs in region to multiple spaces, preserving columns.
- 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)
- (let ((percent 5))
- (while (search-forward "\t" nil t) ; faster than re-search
- (let ((tab-beg (point))
- (column (current-column))
- (indent-tabs-mode nil))
- (skip-chars-backward "\t" start)
- (delete-region tab-beg (point))
- ;; XEmacs change -- show progress
- (indent-to column)
- (if (> (/ (* 100 (- (point) start)) (- (point-max) start)) percent)
- (progn
- (message "untabify: %d%% ..." percent)
- (setq percent (+ 5 percent)))))))
- (message "untabify: done")))
- nil)
-
- ;;;###autoload
- (defun tabify (start end)
- "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.
- 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
- ;; Include the beginning of the line in the narrowing
- ;; since otherwise it will throw off current-column.
- (goto-char start)
- (beginning-of-line)
- (narrow-to-region (point) end)
- (goto-char start)
- (let ((percent 5))
- (while (re-search-forward "[ \t][ \t][ \t]*" nil t)
- (let ((column (current-column))
- (indent-tabs-mode t))
- (delete-region (match-beginning 0) (point))
- ;; XEmacs change -- show progress
- (indent-to column)
- (if (> (/ (* 100 (- (point) start)) (- (point-max) start)) percent)
- (progn
- (message "tabify: %d%% ..." percent)
- (setq percent (+ 5 percent)))))))
- (message "tabify: done"))))
-
- (provide 'tabify)
-
- ;;; tabify.el ends here
-