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28d3ed91 | 1 | ;;; delsel.el --- delete selection if you insert |
76550a57 | 2 | |
0d30b337 | 3 | ;; Copyright (C) 1992, 1997, 1998, 2001, 2002, 2003, 2004, |
d7a0267c | 4 | ;; 2005, 2006, 2007 Free Software Foundation, Inc. |
76550a57 ER |
5 | |
6 | ;; Author: Matthieu Devin <devin@lucid.com> | |
4228277d | 7 | ;; Maintainer: FSF |
76550a57 | 8 | ;; Created: 14 Jul 92 |
f947a7fa | 9 | ;; Keywords: convenience emulations |
b0dbaa21 | 10 | |
b578f267 | 11 | ;; This file is part of GNU Emacs. |
b0dbaa21 | 12 | |
b578f267 EN |
13 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
14 | ;; it under the terms of the GNU General Public License as published by | |
b4aa6026 | 15 | ;; the Free Software Foundation; either version 3, or (at your option) |
b578f267 | 16 | ;; any later version. |
b0dbaa21 | 17 | |
b578f267 EN |
18 | ;; GNU Emacs is distributed in the hope that it will be useful, |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
b0dbaa21 | 22 | |
b578f267 EN |
23 | ;; You should have received a copy of the GNU General Public License |
24 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
086add15 LK |
25 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
26 | ;; Boston, MA 02110-1301, USA. | |
b0dbaa21 | 27 | |
76550a57 | 28 | ;;; Commentary: |
b0dbaa21 | 29 | |
b578f267 EN |
30 | ;; This file makes the active region be pending delete, meaning that |
31 | ;; text inserted while the region is active will replace the region contents. | |
32 | ;; This is a popular behavior of personal computers text editors. | |
b0dbaa21 | 33 | |
69b3c6c7 DL |
34 | ;; Interface: |
35 | ||
36 | ;; Commands which will delete the selection need a 'delete-selection | |
37 | ;; property on their symbols; commands which insert text but don't | |
38 | ;; have this property won't delete the selction. It can be one of | |
39 | ;; the values: | |
40 | ;; 'yank | |
41 | ;; For commands which do a yank; ensures the region about to be | |
42 | ;; deleted isn't yanked. | |
43 | ;; 'supersede | |
44 | ;; Delete the active region and ignore the current command, | |
45 | ;; i.e. the command will just delete the region. | |
46 | ;; 'kill | |
47 | ;; `kill-region' is used on the selection, rather than | |
48 | ;; `delete-region'. (Text selected with the mouse will typically | |
49 | ;; be yankable anyhow.) | |
50 | ;; non-nil | |
51 | ;; The normal case: delete the active region prior to executing | |
52 | ;; the command which will insert replacement text. | |
76550a57 | 53 | |
69b3c6c7 | 54 | ;;; Code: |
7853929f SM |
55 | |
56 | ;;;###autoload | |
57 | (defalias 'pending-delete-mode 'delete-selection-mode) | |
58 | ||
59 | ;;;###autoload | |
ad03cafc | 60 | (define-minor-mode delete-selection-mode |
7853929f | 61 | "Toggle Delete Selection mode. |
69b3c6c7 DL |
62 | With prefix ARG, turn Delete Selection mode on if and only if ARG is |
63 | positive. | |
7853929f | 64 | |
69b3c6c7 DL |
65 | When Delete Selection mode is enabled, Transient Mark mode is also |
66 | enabled and typed text replaces the selection if the selection is | |
67 | active. Otherwise, typed text is just inserted at point regardless of | |
68 | any selection." | |
82fdafde | 69 | :global t :group 'editing-basics |
7853929f SM |
70 | (if (not delete-selection-mode) |
71 | (remove-hook 'pre-command-hook 'delete-selection-pre-hook) | |
72 | (add-hook 'pre-command-hook 'delete-selection-pre-hook) | |
73 | (transient-mark-mode t))) | |
74 | ||
b0dbaa21 | 75 | (defun delete-active-region (&optional killp) |
af9157b9 RS |
76 | (if killp |
77 | (kill-region (point) (mark)) | |
78 | (delete-region (point) (mark))) | |
af9157b9 | 79 | t) |
b0dbaa21 | 80 | |
28d3ed91 | 81 | (defun delete-selection-pre-hook () |
7853929f SM |
82 | (when (and delete-selection-mode transient-mark-mode mark-active |
83 | (not buffer-read-only)) | |
84 | (let ((type (and (symbolp this-command) | |
85 | (get this-command 'delete-selection)))) | |
f13e84fa RS |
86 | (condition-case data |
87 | (cond ((eq type 'kill) | |
88 | (delete-active-region t)) | |
89 | ((eq type 'yank) | |
195d88f4 JL |
90 | ;; Before a yank command, make sure we don't yank the |
91 | ;; head of the kill-ring that really comes from the | |
67755cc4 JL |
92 | ;; currently active region we are going to delete. |
93 | ;; That would make yank a no-op. | |
195d88f4 JL |
94 | (when (and (string= (buffer-substring-no-properties (point) (mark)) |
95 | (car kill-ring)) | |
614a773a | 96 | (fboundp 'mouse-region-match) |
67755cc4 | 97 | (mouse-region-match)) |
f13e84fa RS |
98 | (current-kill 1)) |
99 | (delete-active-region)) | |
100 | ((eq type 'supersede) | |
101 | (let ((empty-region (= (point) (mark)))) | |
102 | (delete-active-region) | |
103 | (unless empty-region | |
104 | (setq this-command 'ignore)))) | |
105 | (type | |
ec08e2f4 JL |
106 | (delete-active-region) |
107 | (if (and overwrite-mode (eq this-command 'self-insert-command)) | |
108 | (let ((overwrite-mode nil)) | |
109 | (self-insert-command (prefix-numeric-value current-prefix-arg)) | |
110 | (setq this-command 'ignore))))) | |
f13e84fa RS |
111 | (file-supersession |
112 | ;; If ask-user-about-supersession-threat signals an error, | |
113 | ;; stop safe_run_hooks from clearing out pre-command-hook. | |
114 | (and (eq inhibit-quit 'pre-command-hook) | |
115 | (setq inhibit-quit 'delete-selection-dummy)) | |
116 | (signal 'file-supersession (cdr data))))))) | |
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 | ||
23652376 | 133 | ;; This is very useful for cancelling a selection in the minibuffer without |
b0dbaa21 | 134 | ;; aborting the minibuffer. |
b0dbaa21 RS |
135 | (defun minibuffer-keyboard-quit () |
136 | "Abort recursive edit. | |
69b3c6c7 DL |
137 | In Delete Selection mode, if the mark is active, just deactivate it; |
138 | then it takes a second \\[keyboard-quit] to abort the minibuffer." | |
b0dbaa21 | 139 | (interactive) |
d4df3279 RS |
140 | (if (and delete-selection-mode transient-mark-mode mark-active) |
141 | (setq deactivate-mark t) | |
b0dbaa21 RS |
142 | (abort-recursive-edit))) |
143 | ||
23652376 DL |
144 | (define-key minibuffer-local-map "\C-g" 'minibuffer-keyboard-quit) |
145 | (define-key minibuffer-local-ns-map "\C-g" 'minibuffer-keyboard-quit) | |
146 | (define-key minibuffer-local-completion-map "\C-g" 'minibuffer-keyboard-quit) | |
147 | (define-key minibuffer-local-must-match-map "\C-g" 'minibuffer-keyboard-quit) | |
148 | (define-key minibuffer-local-isearch-map "\C-g" 'minibuffer-keyboard-quit) | |
149 | ||
150 | (defun delsel-unload-hook () | |
151 | (define-key minibuffer-local-map "\C-g" 'abort-recursive-edit) | |
152 | (define-key minibuffer-local-ns-map "\C-g" 'abort-recursive-edit) | |
153 | (define-key minibuffer-local-completion-map "\C-g" 'abort-recursive-edit) | |
154 | (define-key minibuffer-local-must-match-map "\C-g" 'abort-recursive-edit) | |
155 | (define-key minibuffer-local-isearch-map "\C-g" 'abort-recursive-edit)) | |
b0dbaa21 | 156 | |
87f14b12 RS |
157 | (add-hook 'delsel-unload-hook 'delsel-unload-hook) |
158 | ||
d4df3279 | 159 | (provide 'delsel) |
b0dbaa21 | 160 | |
ab5796a9 | 161 | ;;; arch-tag: 1e388890-1b50-4ed0-9347-763b1343b6ed |
d4df3279 | 162 | ;;; delsel.el ends here |