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28d3ed91 | 1 | ;;; delsel.el --- delete selection if you insert |
76550a57 | 2 | |
b0dbaa21 | 3 | ;;; Copyright (C) 1992 Free Software Foundation, Inc. |
76550a57 ER |
4 | |
5 | ;; Author: Matthieu Devin <devin@lucid.com> | |
6 | ;; Created: 14 Jul 92 | |
7 | ;; Last change 18-Feb-93, devin. | |
b0dbaa21 RS |
8 | |
9 | ;;; This file is part of GNU Emacs. | |
10 | ||
11 | ;;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;;; it under the terms of the GNU General Public License as published by | |
13 | ;;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;;; any later version. | |
15 | ||
16 | ;;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;;; GNU General Public License for more details. | |
20 | ||
21 | ;;; You should have received a copy of the GNU General Public License | |
22 | ;;; along with GNU Emacs; see the file COPYING. If not, write to | |
23 | ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
76550a57 | 25 | ;;; Commentary: |
b0dbaa21 | 26 | |
76550a57 | 27 | ;;; This file makes the active region be pending delete, meaning that |
b0dbaa21 RS |
28 | ;;; text inserted while the region is active will replace the region contents. |
29 | ;;; This is a popular behavior of personal computers text editors. | |
30 | ||
76550a57 ER |
31 | ;;; Code: |
32 | ||
28d3ed91 RS |
33 | (defvar delete-selection-mode t |
34 | "*Non-nil means Delete Selection mode is enabled. | |
35 | In Delete Selection mode, when a region is highlighted, | |
af9157b9 RS |
36 | insertion commands first delete the region and then insert.") |
37 | ||
b0dbaa21 | 38 | (defun delete-active-region (&optional killp) |
af9157b9 RS |
39 | (if killp |
40 | (kill-region (point) (mark)) | |
41 | (delete-region (point) (mark))) | |
42 | (setq mark-active nil) | |
43 | (run-hooks 'deactivate-mark-hook) | |
44 | t) | |
b0dbaa21 | 45 | |
28d3ed91 RS |
46 | (defun delete-selection-pre-hook () |
47 | (if (and delete-selection-mode | |
af9157b9 RS |
48 | (not buffer-read-only) |
49 | transient-mark-mode mark-active) | |
50 | (let ((type (and (symbolp this-command) | |
28d3ed91 | 51 | (get this-command 'delete-selection)))) |
af9157b9 RS |
52 | (cond ((eq type 'kill) |
53 | (delete-active-region t)) | |
54 | ((eq type 'supersede) | |
d4df3279 | 55 | (if (delete-active-region nil) |
af9157b9 RS |
56 | (setq this-command '(lambda () (interactive))))) |
57 | (type | |
d4df3279 | 58 | (delete-active-region nil)))))) |
af9157b9 | 59 | |
28d3ed91 | 60 | (add-hook 'pre-command-hook 'delete-selection-pre-hook) |
b0dbaa21 | 61 | |
28d3ed91 | 62 | (put 'self-insert-command 'delete-selection t) |
cc5ac2c6 | 63 | (put 'self-insert-iso 'delete-selection t) |
b0dbaa21 | 64 | |
28d3ed91 | 65 | (put 'yank 'delete-selection t) |
d4df3279 | 66 | (put 'insert-register 'delete-selection t) |
b0dbaa21 | 67 | |
28d3ed91 RS |
68 | (put 'delete-backward-char 'delete-selection 'supersede) |
69 | (put 'backward-delete-char-untabify 'delete-selection 'supersede) | |
70 | (put 'delete-char 'delete-selection 'supersede) | |
b0dbaa21 | 71 | |
28d3ed91 RS |
72 | (put 'newline-and-indent 'delete-selection 't) |
73 | (put 'newline 'delete-selection t) | |
74 | (put 'open-line 'delete-selection t) | |
b0dbaa21 | 75 | |
d4df3279 | 76 | ;;;###autoload |
28d3ed91 | 77 | (defalias 'pending-delete-mode 'delete-selection-mode) |
d4df3279 | 78 | ;;;###autoload |
28d3ed91 RS |
79 | (defun delete-selection-mode (arg) |
80 | "Toggle Delete Selection mode. | |
b0dbaa21 RS |
81 | When ON, typed text replaces the selection if the selection is active. |
82 | When OFF, typed text is just inserted at point." | |
af9157b9 | 83 | (interactive "P") |
28d3ed91 RS |
84 | (setq delete-selection-mode |
85 | (if (null arg) (not delete-selection-mode) | |
af9157b9 | 86 | (> (prefix-numeric-value arg) 0))) |
2fc86734 | 87 | (force-mode-line-update)) |
b0dbaa21 | 88 | |
b0dbaa21 RS |
89 | ;; This is very useful for cancelling a selection in the minibuffer without |
90 | ;; aborting the minibuffer. | |
b0dbaa21 RS |
91 | (defun minibuffer-keyboard-quit () |
92 | "Abort recursive edit. | |
d4df3279 RS |
93 | In Delete Selection mode mode, if the mark is active, just deactivate it; |
94 | then it takes a second C-g to abort the minibuffer." | |
b0dbaa21 | 95 | (interactive) |
d4df3279 RS |
96 | (if (and delete-selection-mode transient-mark-mode mark-active) |
97 | (setq deactivate-mark t) | |
b0dbaa21 RS |
98 | (abort-recursive-edit))) |
99 | ||
100 | (define-key minibuffer-local-map "\C-g" 'minibuffer-keyboard-quit) | |
28d3ed91 RS |
101 | (define-key minibuffer-local-ns-map "\C-g" 'minibuffer-keyboard-quit) |
102 | (define-key minibuffer-local-completion-map "\C-g" 'minibuffer-keyboard-quit) | |
103 | (define-key minibuffer-local-must-match-map "\C-g" 'minibuffer-keyboard-quit) | |
104 | (define-key minibuffer-local-isearch-map "\C-g" 'minibuffer-keyboard-quit) | |
b0dbaa21 | 105 | |
d4df3279 | 106 | (provide 'delsel) |
b0dbaa21 | 107 | |
d4df3279 | 108 | ;;; delsel.el ends here |