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28d3ed91 | 1 | ;;; delsel.el --- delete selection if you insert |
76550a57 | 2 | |
69b3c6c7 | 3 | ;; Copyright (C) 1992, 1997, 1998 Free Software Foundation, Inc. |
76550a57 ER |
4 | |
5 | ;; Author: Matthieu Devin <devin@lucid.com> | |
4228277d | 6 | ;; Maintainer: FSF |
76550a57 | 7 | ;; Created: 14 Jul 92 |
b0dbaa21 | 8 | |
b578f267 | 9 | ;; This file is part of GNU Emacs. |
b0dbaa21 | 10 | |
b578f267 EN |
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. | |
b0dbaa21 | 15 | |
b578f267 EN |
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. | |
b0dbaa21 | 20 | |
b578f267 EN |
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 the | |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
b0dbaa21 | 25 | |
76550a57 | 26 | ;;; Commentary: |
b0dbaa21 | 27 | |
b578f267 EN |
28 | ;; This file makes the active region be pending delete, meaning that |
29 | ;; text inserted while the region is active will replace the region contents. | |
30 | ;; This is a popular behavior of personal computers text editors. | |
b0dbaa21 | 31 | |
69b3c6c7 DL |
32 | ;; Interface: |
33 | ||
34 | ;; Commands which will delete the selection need a 'delete-selection | |
35 | ;; property on their symbols; commands which insert text but don't | |
36 | ;; have this property won't delete the selction. It can be one of | |
37 | ;; the values: | |
38 | ;; 'yank | |
39 | ;; For commands which do a yank; ensures the region about to be | |
40 | ;; deleted isn't yanked. | |
41 | ;; 'supersede | |
42 | ;; Delete the active region and ignore the current command, | |
43 | ;; i.e. the command will just delete the region. | |
44 | ;; 'kill | |
45 | ;; `kill-region' is used on the selection, rather than | |
46 | ;; `delete-region'. (Text selected with the mouse will typically | |
47 | ;; be yankable anyhow.) | |
48 | ;; non-nil | |
49 | ;; The normal case: delete the active region prior to executing | |
50 | ;; the command which will insert replacement text. | |
76550a57 | 51 | |
69b3c6c7 | 52 | ;;; Code: |
7853929f SM |
53 | |
54 | ;;;###autoload | |
55 | (defalias 'pending-delete-mode 'delete-selection-mode) | |
56 | ||
57 | ;;;###autoload | |
58 | (defun delete-selection-mode (&optional arg) | |
59 | "Toggle Delete Selection mode. | |
69b3c6c7 DL |
60 | With prefix ARG, turn Delete Selection mode on if and only if ARG is |
61 | positive. | |
7853929f | 62 | |
69b3c6c7 DL |
63 | When Delete Selection mode is enabled, Transient Mark mode is also |
64 | enabled and typed text replaces the selection if the selection is | |
65 | active. Otherwise, typed text is just inserted at point regardless of | |
66 | any selection." | |
7853929f SM |
67 | (interactive "P") |
68 | (setq delete-selection-mode (if arg | |
69 | (> (prefix-numeric-value arg) 0) | |
70 | (not delete-selection-mode))) | |
71 | (if (not delete-selection-mode) | |
72 | (remove-hook 'pre-command-hook 'delete-selection-pre-hook) | |
73 | (add-hook 'pre-command-hook 'delete-selection-pre-hook) | |
74 | (transient-mark-mode t))) | |
75 | ||
76 | ;;;###autoload | |
77 | (defcustom delete-selection-mode nil | |
78 | "Toggle Delete Selection mode. | |
69b3c6c7 | 79 | See command `delete-selection-mode'. |
7853929f SM |
80 | You must modify via \\[customize] for this variable to have an effect." |
81 | :set (lambda (symbol value) | |
82 | (delete-selection-mode (or value 0))) | |
16be0abe | 83 | :initialize 'custom-initialize-default |
7853929f SM |
84 | :type 'boolean |
85 | :group 'editing-basics | |
86 | :require 'delsel) | |
af9157b9 | 87 | |
b0dbaa21 | 88 | (defun delete-active-region (&optional killp) |
af9157b9 RS |
89 | (if killp |
90 | (kill-region (point) (mark)) | |
91 | (delete-region (point) (mark))) | |
92 | (setq mark-active nil) | |
93 | (run-hooks 'deactivate-mark-hook) | |
94 | t) | |
b0dbaa21 | 95 | |
28d3ed91 | 96 | (defun delete-selection-pre-hook () |
7853929f SM |
97 | (when (and delete-selection-mode transient-mark-mode mark-active |
98 | (not buffer-read-only)) | |
99 | (let ((type (and (symbolp this-command) | |
100 | (get this-command 'delete-selection)))) | |
101 | (cond ((eq type 'kill) | |
102 | (delete-active-region t)) | |
103 | ((eq type 'yank) | |
104 | ;; Before a yank command, | |
105 | ;; make sure we don't yank the same region | |
106 | ;; that we are going to delete. | |
107 | ;; That would make yank a no-op. | |
108 | (when (string= (buffer-substring-no-properties (point) (mark)) | |
6b214411 | 109 | (car kill-ring)) |
7853929f | 110 | (current-kill 1)) |
69b3c6c7 | 111 | (delete-active-region)) |
7853929f | 112 | ((eq type 'supersede) |
69b3c6c7 DL |
113 | (delete-active-region) |
114 | (setq this-command 'ignore)) | |
7853929f | 115 | (type |
69b3c6c7 | 116 | (delete-active-region)))))) |
b0dbaa21 | 117 | |
28d3ed91 | 118 | (put 'self-insert-command 'delete-selection t) |
cc5ac2c6 | 119 | (put 'self-insert-iso 'delete-selection t) |
b0dbaa21 | 120 | |
6b214411 | 121 | (put 'yank 'delete-selection 'yank) |
b708f0ad | 122 | (put 'clipboard-yank 'delete-selection 'yank) |
d4df3279 | 123 | (put 'insert-register 'delete-selection t) |
b0dbaa21 | 124 | |
28d3ed91 RS |
125 | (put 'delete-backward-char 'delete-selection 'supersede) |
126 | (put 'backward-delete-char-untabify 'delete-selection 'supersede) | |
127 | (put 'delete-char 'delete-selection 'supersede) | |
b0dbaa21 | 128 | |
69b3c6c7 | 129 | (put 'newline-and-indent 'delete-selection t) |
28d3ed91 | 130 | (put 'newline 'delete-selection t) |
69b3c6c7 DL |
131 | (put 'open-line 'delete-selection 'kill) |
132 | ||
133 | (put 'insert-parentheses 'delete-selection t) | |
b0dbaa21 | 134 | |
b0dbaa21 RS |
135 | ;; This is very useful for cancelling a selection in the minibuffer without |
136 | ;; aborting the minibuffer. | |
b0dbaa21 RS |
137 | (defun minibuffer-keyboard-quit () |
138 | "Abort recursive edit. | |
69b3c6c7 DL |
139 | In Delete Selection mode, if the mark is active, just deactivate it; |
140 | then it takes a second \\[keyboard-quit] to abort the minibuffer." | |
b0dbaa21 | 141 | (interactive) |
d4df3279 RS |
142 | (if (and delete-selection-mode transient-mark-mode mark-active) |
143 | (setq deactivate-mark t) | |
b0dbaa21 RS |
144 | (abort-recursive-edit))) |
145 | ||
146 | (define-key minibuffer-local-map "\C-g" 'minibuffer-keyboard-quit) | |
28d3ed91 RS |
147 | (define-key minibuffer-local-ns-map "\C-g" 'minibuffer-keyboard-quit) |
148 | (define-key minibuffer-local-completion-map "\C-g" 'minibuffer-keyboard-quit) | |
149 | (define-key minibuffer-local-must-match-map "\C-g" 'minibuffer-keyboard-quit) | |
150 | (define-key minibuffer-local-isearch-map "\C-g" 'minibuffer-keyboard-quit) | |
b0dbaa21 | 151 | |
d4df3279 | 152 | (provide 'delsel) |
b0dbaa21 | 153 | |
16be0abe RS |
154 | ;; This is the standard way mechanism to put the mode into effect |
155 | ;; if delete-selection-mode has already been set to t | |
156 | ;; when this file is loaded. | |
157 | (when delete-selection-mode | |
158 | (delete-selection-mode t)) | |
159 | ||
d4df3279 | 160 | ;;; delsel.el ends here |