Mercurial > hg > xemacs-beta
comparison lisp/prim/tabify.el @ 0:376386a54a3c r19-14
Import from CVS: tag r19-14
| author | cvs |
|---|---|
| date | Mon, 13 Aug 2007 08:45:50 +0200 |
| parents | |
| children | ac2d302a0011 |
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| -1:000000000000 | 0:376386a54a3c |
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| 1 ;;; tabify.el --- tab conversion commands for XEmacs | |
| 2 | |
| 3 ;; Copyright (C) 1985, 1994 Free Software Foundation, Inc. | |
| 4 | |
| 5 ;; Maintainer: FSF | |
| 6 | |
| 7 ;; This file is part of XEmacs. | |
| 8 | |
| 9 ;; XEmacs is free software; you can redistribute it and/or modify it | |
| 10 ;; under the terms of the GNU General Public License as published by | |
| 11 ;; the Free Software Foundation; either version 2, or (at your option) | |
| 12 ;; any later version. | |
| 13 | |
| 14 ;; XEmacs is distributed in the hope that it will be useful, but | |
| 15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 17 ;; General Public License for more details. | |
| 18 | |
| 19 ;; You should have received a copy of the GNU General Public License | |
| 20 ;; along with XEmacs; see the file COPYING. If not, write to the Free | |
| 21 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 22 | |
| 23 ;;; Synched up with: FSF 19.30. | |
| 24 | |
| 25 ;;; Commentary: | |
| 26 | |
| 27 ;; Commands to optimize spaces to tabs or expand tabs to spaces in a region | |
| 28 ;; (`tabify' and `untabify'). The variable tab-width does the obvious. | |
| 29 | |
| 30 ;;; Code: | |
| 31 | |
| 32 ;;;###autoload | |
| 33 (defun untabify (start end) | |
| 34 "Convert all tabs in region to multiple spaces, preserving columns. | |
| 35 Called non-interactively, the region is specified by arguments | |
| 36 START and END, rather than by the position of point and mark. | |
| 37 The variable `tab-width' controls the spacing of tab stops." | |
| 38 (interactive "r") | |
| 39 (save-excursion | |
| 40 (save-restriction | |
| 41 (narrow-to-region (point-min) end) | |
| 42 (goto-char start) | |
| 43 (let ((percent 5)) | |
| 44 (while (search-forward "\t" nil t) ; faster than re-search | |
| 45 (let ((tab-beg (point)) | |
| 46 (column (current-column)) | |
| 47 (indent-tabs-mode nil)) | |
| 48 (skip-chars-backward "\t" start) | |
| 49 (delete-region tab-beg (point)) | |
| 50 (indent-to column) | |
| 51 (if (> (/ (* 100 (- (point) start)) (- (point-max) start)) percent) | |
| 52 (progn | |
| 53 (message "untabify: %d%% ..." percent) | |
| 54 (setq percent (+ 5 percent))))))) | |
| 55 (message "untabify: done")))) | |
| 56 | |
| 57 ;;;###autoload | |
| 58 (defun tabify (start end) | |
| 59 "Convert multiple spaces in region to tabs when possible. | |
| 60 A group of spaces is partially replaced by tabs | |
| 61 when this can be done without changing the column they end at. | |
| 62 Called non-interactively, the region is specified by arguments | |
| 63 START and END, rather than by the position of point and mark. | |
| 64 The variable `tab-width' controls the spacing of tab stops." | |
| 65 (interactive "r") | |
| 66 (save-excursion | |
| 67 (save-restriction | |
| 68 ;; Include the beginning of the line in the narrowing | |
| 69 ;; since otherwise it will throw off current-column. | |
| 70 (goto-char start) | |
| 71 (beginning-of-line) | |
| 72 (narrow-to-region (point) end) | |
| 73 (goto-char start) | |
| 74 (let ((percent 5)) | |
| 75 (while (re-search-forward "[ \t][ \t][ \t]*" nil t) | |
| 76 (let ((column (current-column)) | |
| 77 (indent-tabs-mode t)) | |
| 78 (delete-region (match-beginning 0) (point)) | |
| 79 (indent-to column) | |
| 80 (if (> (/ (* 100 (- (point) start)) (- (point-max) start)) percent) | |
| 81 (progn | |
| 82 (message "tabify: %d%% ..." percent) | |
| 83 (setq percent (+ 5 percent))))))) | |
| 84 (message "tabify: done")))) | |
| 85 | |
| 86 (provide 'tabify) | |
| 87 | |
| 88 ;;; tabify.el ends here |