1 ;;; Pending delete selection
2 ;;; Copyright (C) 1992 Free Software Foundation, Inc.
3 ;;; Created: 14 Jul 92, Matthieu Devin <devin@lucid.com>
4 ;;; Last change 18-Feb-93, devin.
6 ;;; This file is part of GNU Emacs.
8 ;;; GNU Emacs is free software; you can redistribute it and/or modify
9 ;;; it under the terms of the GNU General Public License as published by
10 ;;; the Free Software Foundation; either version 2, or (at your option)
11 ;;; any later version.
13 ;;; GNU Emacs is distributed in the hope that it will be useful,
14 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;;; GNU General Public License for more details.
18 ;;; You should have received a copy of the GNU General Public License
19 ;;; along with GNU Emacs; see the file COPYING. If not, write to
20 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 ;;; This files makes the active region be pending delete, meaning that
24 ;;; text inserted while the region is active will replace the region contents.
25 ;;; This is a popular behavior of personal computers text editors.
27 (defvar pending-delete-mode t
28 "*Non-nil means Pending Delete mode is enabled.
29 In Pending Delete mode, when a region is highlighted,
30 insertion commands first delete the region and then insert.")
32 (defun delete-active-region (&optional killp
)
34 (kill-region (point) (mark))
35 (delete-region (point) (mark)))
36 (setq mark-active nil
)
37 (run-hooks 'deactivate-mark-hook
)
40 (defun pending-delete-pre-hook ()
41 (if (and pending-delete-mode
42 (not buffer-read-only
)
43 transient-mark-mode mark-active
)
44 (let ((type (and (symbolp this-command
)
45 (get this-command
'pending-delete
))))
46 (cond ((eq type
'kill
)
47 (delete-active-region t
))
49 (if (delete-active-region ())
50 (setq this-command
'(lambda () (interactive)))))
52 (delete-active-region ()))))))
54 (add-hook 'pre-command-hook
'pending-delete-pre-hook
)
56 (put 'self-insert-command
'pending-delete t
)
58 (put 'yank
'pending-delete t
)
59 (put 'x-yank-clipboard-selection
'pending-delete t
)
61 (put 'delete-backward-char
'pending-delete
'supersede
)
62 (put 'backward-delete-char-untabify
'pending-delete
'supersede
)
63 (put 'delete-char
'pending-delete
'supersede
)
65 (put 'newline-and-indent
'pending-delete
't
)
66 (put 'newline
'pending-delete t
)
67 (put 'open-line
'pending-delete t
)
69 (defun pending-delete-mode (arg)
70 "Toggle the state of pending-delete mode.
71 When ON, typed text replaces the selection if the selection is active.
72 When OFF, typed text is just inserted at point."
74 (setq pending-delete-mode
75 (if (null arg
) (not pending-delete-mode
)
76 (> (prefix-numeric-value arg
) 0)))
77 (set-buffer-modified-p (buffer-modified-p))) ;No-op, but updates mode line.
79 ;; This new definition of control-G makes the first control-G disown the
80 ;; selection and the second one signal a QUIT.
81 ;; This is very useful for cancelling a selection in the minibuffer without
82 ;; aborting the minibuffer.
83 ;; It has actually nothing to do with pending-delete but its more necessary
84 ;; with pending delete because pending delete users use the selection more.
85 (defun keyboard-quit ()
86 "Signal a `quit' condition.
87 During execution of Lisp code, this character causes a quit directly.
88 At top-level, as an editor command, this simply beeps.
89 In Transient Mark mode, if the mark is active, just deactivate it."
91 (if (and transient-mark-mode mark-active
)
93 ;; Don't beep if just deactivating the region.
94 (setq mark-active nil
)
95 (run-hooks 'deactivate-mark-hook
))
98 (defun minibuffer-keyboard-quit ()
99 "Abort recursive edit.
100 In Transient Mark mode, if the mark is active, just deactivate it."
102 (if (and transient-mark-mode mark-active
)
104 ;; Don't beep if just deactivating the region.
105 (setq mark-active nil
)
106 (run-hooks 'deactivate-mark-hook
))
107 (abort-recursive-edit)))
109 (define-key minibuffer-local-map
"\C-g" 'minibuffer-keyboard-quit
)
111 (provide 'pending-del
)
113 ;; End of pending-del.el.