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Annotation of GNUtools/emacs/lisp/tabify.el, revision 1.1

1.1     ! root        1: ;; Tab conversion commands for Emacs
        !             2: ;; Copyright (C) 1985 Free Software Foundation, Inc.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is free software; you can redistribute it and/or modify
        !             7: ;; it under the terms of the GNU General Public License as published by
        !             8: ;; the Free Software Foundation; either version 1, or (at your option)
        !             9: ;; any later version.
        !            10: 
        !            11: ;; GNU Emacs is distributed in the hope that it will be useful,
        !            12: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: ;; GNU General Public License for more details.
        !            15: 
        !            16: ;; You should have received a copy of the GNU General Public License
        !            17: ;; along with GNU Emacs; see the file COPYING.  If not, write to
        !            18: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
        !            19: 
        !            20: 
        !            21: (defun untabify (start end)
        !            22:   "Convert all tabs in region to multiple spaces, preserving columns.
        !            23: The variable tab-width controls the action."
        !            24:   (interactive "r")
        !            25:   (save-excursion
        !            26:     (save-restriction
        !            27:       (narrow-to-region start end)
        !            28:       (goto-char start)
        !            29:       (while (search-forward "\t" nil t)       ; faster than re-search
        !            30:        (let ((start (point))
        !            31:              (column (current-column))
        !            32:              (indent-tabs-mode nil))
        !            33:          (skip-chars-backward "\t")
        !            34:          (delete-region start (point))
        !            35:          (indent-to column))))))
        !            36: 
        !            37: (defun tabify (start end)
        !            38:   "Convert multiple spaces in region to tabs when possible.
        !            39: A group of spaces is partially replaced by tabs
        !            40: when this can be done without changing the column they end at.
        !            41: The variable tab-width controls the action."
        !            42:   (interactive "r")
        !            43:   (save-excursion
        !            44:     (save-restriction
        !            45:       (narrow-to-region start end)
        !            46:       (goto-char start)
        !            47:       (while (re-search-forward "[ \t][ \t][ \t]*" nil t)
        !            48:        (let ((column (current-column))
        !            49:              (indent-tabs-mode t))
        !            50:          (delete-region (match-beginning 0) (point))
        !            51:          (indent-to column))))))

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