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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 |
f947a7fa | 8 | ;; Keywords: convenience emulations |
b0dbaa21 | 9 | |
b578f267 | 10 | ;; This file is part of GNU Emacs. |
b0dbaa21 | 11 | |
b578f267 EN |
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation; either version 2, or (at your option) | |
15 | ;; any later version. | |
b0dbaa21 | 16 | |
b578f267 EN |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
b0dbaa21 | 21 | |
b578f267 EN |
22 | ;; You should have received a copy of the GNU General Public License |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | ;; Boston, MA 02111-1307, USA. | |
b0dbaa21 | 26 | |
76550a57 | 27 | ;;; Commentary: |
b0dbaa21 | 28 | |
b578f267 EN |
29 | ;; This file makes the active region be pending delete, meaning that |
30 | ;; text inserted while the region is active will replace the region contents. | |
31 | ;; This is a popular behavior of personal computers text editors. | |
b0dbaa21 | 32 | |
69b3c6c7 DL |
33 | ;; Interface: |
34 | ||
35 | ;; Commands which will delete the selection need a 'delete-selection | |
36 | ;; property on their symbols; commands which insert text but don't | |
37 | ;; have this property won't delete the selction. It can be one of | |
38 | ;; the values: | |
39 | ;; 'yank | |
40 | ;; For commands which do a yank; ensures the region about to be | |
41 | ;; deleted isn't yanked. | |
42 | ;; 'supersede | |
43 | ;; Delete the active region and ignore the current command, | |
44 | ;; i.e. the command will just delete the region. | |
45 | ;; 'kill | |
46 | ;; `kill-region' is used on the selection, rather than | |
47 | ;; `delete-region'. (Text selected with the mouse will typically | |
48 | ;; be yankable anyhow.) | |
49 | ;; non-nil | |
50 | ;; The normal case: delete the active region prior to executing | |
51 | ;; the command which will insert replacement text. | |
76550a57 | 52 | |
69b3c6c7 | 53 | ;;; Code: |
7853929f SM |
54 | |
55 | ;;;###autoload | |
56 | (defalias 'pending-delete-mode 'delete-selection-mode) | |
57 | ||
58 | ;;;###autoload | |
59 | (defun delete-selection-mode (&optional arg) | |
60 | "Toggle Delete Selection mode. | |
69b3c6c7 DL |
61 | With prefix ARG, turn Delete Selection mode on if and only if ARG is |
62 | positive. | |
7853929f | 63 | |
69b3c6c7 DL |
64 | When Delete Selection mode is enabled, Transient Mark mode is also |
65 | enabled and typed text replaces the selection if the selection is | |
66 | active. Otherwise, typed text is just inserted at point regardless of | |
67 | any selection." | |
7853929f SM |
68 | (interactive "P") |
69 | (setq delete-selection-mode (if arg | |
70 | (> (prefix-numeric-value arg) 0) | |
71 | (not delete-selection-mode))) | |
72 | (if (not delete-selection-mode) | |
73 | (remove-hook 'pre-command-hook 'delete-selection-pre-hook) | |
74 | (add-hook 'pre-command-hook 'delete-selection-pre-hook) | |
75 | (transient-mark-mode t))) | |
76 | ||
77 | ;;;###autoload | |
78 | (defcustom delete-selection-mode nil | |
79 | "Toggle Delete Selection mode. | |
69b3c6c7 | 80 | See command `delete-selection-mode'. |
735cb9a3 DL |
81 | Setting this variable directly does not take effect; |
82 | use either \\[customize] or the function `delete-selection-mode'." | |
7853929f SM |
83 | :set (lambda (symbol value) |
84 | (delete-selection-mode (or value 0))) | |
16be0abe | 85 | :initialize 'custom-initialize-default |
7853929f SM |
86 | :type 'boolean |
87 | :group 'editing-basics | |
88 | :require 'delsel) | |
af9157b9 | 89 | |
b0dbaa21 | 90 | (defun delete-active-region (&optional killp) |
af9157b9 RS |
91 | (if killp |
92 | (kill-region (point) (mark)) | |
93 | (delete-region (point) (mark))) | |
94 | (setq mark-active nil) | |
95 | (run-hooks 'deactivate-mark-hook) | |
96 | t) | |
b0dbaa21 | 97 | |
28d3ed91 | 98 | (defun delete-selection-pre-hook () |
7853929f SM |
99 | (when (and delete-selection-mode transient-mark-mode mark-active |
100 | (not buffer-read-only)) | |
101 | (let ((type (and (symbolp this-command) | |
102 | (get this-command 'delete-selection)))) | |
103 | (cond ((eq type 'kill) | |
104 | (delete-active-region t)) | |
105 | ((eq type 'yank) | |
106 | ;; Before a yank command, | |
107 | ;; make sure we don't yank the same region | |
108 | ;; that we are going to delete. | |
109 | ;; That would make yank a no-op. | |
110 | (when (string= (buffer-substring-no-properties (point) (mark)) | |
6b214411 | 111 | (car kill-ring)) |
7853929f | 112 | (current-kill 1)) |
69b3c6c7 | 113 | (delete-active-region)) |
7853929f | 114 | ((eq type 'supersede) |
69b3c6c7 DL |
115 | (delete-active-region) |
116 | (setq this-command 'ignore)) | |
7853929f | 117 | (type |
69b3c6c7 | 118 | (delete-active-region)))))) |
b0dbaa21 | 119 | |
28d3ed91 | 120 | (put 'self-insert-command 'delete-selection t) |
cc5ac2c6 | 121 | (put 'self-insert-iso 'delete-selection t) |
b0dbaa21 | 122 | |
6b214411 | 123 | (put 'yank 'delete-selection 'yank) |
b708f0ad | 124 | (put 'clipboard-yank 'delete-selection 'yank) |
d4df3279 | 125 | (put 'insert-register 'delete-selection t) |
b0dbaa21 | 126 | |
28d3ed91 RS |
127 | (put 'delete-backward-char 'delete-selection 'supersede) |
128 | (put 'backward-delete-char-untabify 'delete-selection 'supersede) | |
129 | (put 'delete-char 'delete-selection 'supersede) | |
b0dbaa21 | 130 | |
69b3c6c7 | 131 | (put 'newline-and-indent 'delete-selection t) |
28d3ed91 | 132 | (put 'newline 'delete-selection t) |
69b3c6c7 DL |
133 | (put 'open-line 'delete-selection 'kill) |
134 | ||
135 | (put 'insert-parentheses 'delete-selection t) | |
b0dbaa21 | 136 | |
b0dbaa21 RS |
137 | ;; This is very useful for cancelling a selection in the minibuffer without |
138 | ;; aborting the minibuffer. | |
b0dbaa21 RS |
139 | (defun minibuffer-keyboard-quit () |
140 | "Abort recursive edit. | |
69b3c6c7 DL |
141 | In Delete Selection mode, if the mark is active, just deactivate it; |
142 | then it takes a second \\[keyboard-quit] to abort the minibuffer." | |
b0dbaa21 | 143 | (interactive) |
d4df3279 RS |
144 | (if (and delete-selection-mode transient-mark-mode mark-active) |
145 | (setq deactivate-mark t) | |
b0dbaa21 RS |
146 | (abort-recursive-edit))) |
147 | ||
148 | (define-key minibuffer-local-map "\C-g" 'minibuffer-keyboard-quit) | |
28d3ed91 RS |
149 | (define-key minibuffer-local-ns-map "\C-g" 'minibuffer-keyboard-quit) |
150 | (define-key minibuffer-local-completion-map "\C-g" 'minibuffer-keyboard-quit) | |
151 | (define-key minibuffer-local-must-match-map "\C-g" 'minibuffer-keyboard-quit) | |
152 | (define-key minibuffer-local-isearch-map "\C-g" 'minibuffer-keyboard-quit) | |
b0dbaa21 | 153 | |
d4df3279 | 154 | (provide 'delsel) |
b0dbaa21 | 155 | |
16be0abe RS |
156 | ;; This is the standard way mechanism to put the mode into effect |
157 | ;; if delete-selection-mode has already been set to t | |
158 | ;; when this file is loaded. | |
159 | (when delete-selection-mode | |
160 | (delete-selection-mode t)) | |
161 | ||
d4df3279 | 162 | ;;; delsel.el ends here |