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- ;; pending-del.el --- Making insertions replace any selected text.
-
- ;; Copyright (C) 1992, 1994 Free Software Foundation, Inc.
-
- ;; Author: Matthieu Devin <devin@lucid.com>, 14 Jul 92.
- ;; Maintainer: Hrvoje Niksic <hniksic@srce.hr>
- ;; Version 2.2
-
- ;; This file is part of XEmacs.
-
- ;; XEmacs is free software; you can redistribute it and/or modify it
- ;; under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; XEmacs is distributed in the hope that it will be useful, but
- ;; WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- ;; General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with XEmacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Synched up with: 19.34 (distributed as delsel.el in FSF)
-
- ;;; Commentary:
-
- ;; Much of this code was revamped by Hrvoje Niksic, July 1997, with
- ;; version number set to 2.x.
-
- ;; Pending-del is now a minor mode, with all the normal toggle
- ;; functions. It should be somewhat faster, too.
-
-
- ;;; Code:
-
- (defcustom pending-delete-mode nil
- "Non-nil when Pending Delete mode is enabled.
- In Pending Delete mode, typed text replaces the selected region."
- :type 'boolean
- :set (lambda (symbol value)
- (pending-delete-mode (or value 0)))
- :initialize 'custom-initialize-default
- :require 'pending-del
- :group 'keyboard)
-
- (defcustom pending-delete-modeline-string " PenDel"
- "*String to display in the modeline when Pending Delete mode is active."
- :type 'string
- :group 'keyboard)
-
- (add-minor-mode 'pending-delete-mode 'pending-delete-modeline-string)
-
-
- (defun pending-delete-active-region (&optional killp)
- (when (and (region-active-p)
- (eq (extent-object zmacs-region-extent) (current-buffer))
- (not buffer-read-only))
- ;; Here we used to check whether the point lies between the
- ;; beginning and end of the extent. I don't see how it is
- ;; necessary, as the C code makes sure that this is so; it only
- ;; slow things down.
- (if killp
- (kill-region (region-beginning) (region-end))
- (delete-region (region-beginning) (region-end)))
- (zmacs-deactivate-region)
- t))
-
- (defun pending-delete-pre-hook ()
- (condition-case e
- (let ((type (and (symbolp this-command)
- (get this-command 'pending-delete))))
- (cond ((eq type 'kill)
- (pending-delete-active-region t))
- ((eq type 'supersede)
- (if (pending-delete-active-region ())
- (setq this-command (lambda () (interactive)))))
- (type
- (pending-delete-active-region ()))))
- (error
- (warn "Error caught in `pending-delete-pre-hook': %s"
- (error-message-string e)))))
-
-
- (put 'self-insert-command 'pending-delete t)
-
- (put 'yank 'pending-delete t)
- (put 'x-yank-clipboard-selection 'pending-delete t)
- (put 'toolbar-paste 'pending-delete t)
-
- (put 'delete-backward-char 'pending-delete 'supersede)
- (put 'backward-delete-char-untabify 'pending-delete 'supersede)
- (put 'delete-char 'pending-delete 'supersede)
- (put 'c-electric-delete 'pending-delete 'supersede)
-
- ;; Support the XEmacs 20.3 'delete functions
-
- (put 'backward-or-forward-delete-char 'pending-delete 'supersede)
- (put 'cperl-electric-backspace 'pending-delete 'supersede)
- (put 'cperl-electric-delete 'pending-delete 'supersede)
-
- ;; Don't delete for these. They're more problematic than helpful.
- ;;
- ;; (put 'newline-and-indent 'pending-delete t)
- ;; (put 'newline 'pending-delete t)
- ;; (put 'open-line 'pending-delete t)
-
- (put 'insert-register 'pending-delete t)
-
-
- ;;;###autoload
- (defun turn-on-pending-delete (&optional ignored)
- "Turn on pending delete minor mode unconditionally."
- (interactive)
- (pending-delete-mode 1))
-
- ;;;###autoload
- (defun turn-off-pending-delete (&optional ignored)
- "Turn off pending delete minor mode unconditionally."
- (interactive)
- (pending-delete-mode 0))
-
- ;;;###autoload
- (defun pending-delete-mode (&optional arg)
- "Toggle Pending Delete minor mode.
- When the pending delete is on, typed text replaces the selection.
- With a positive argument, turns it on.
- With a non-positive argument, turns it off."
- (interactive "P")
- (setq pending-delete-mode
- (if (null arg) (not pending-delete-mode)
- (> (prefix-numeric-value arg) 0)))
- (if pending-delete-mode
- (add-hook 'pre-command-hook 'pending-delete-pre-hook)
- (remove-hook 'pre-command-hook 'pending-delete-pre-hook))
- (force-mode-line-update))
-
-
- ;; Backward compatibility:
- ;;;###autoload
- (define-obsolete-function-alias 'pending-delete-on 'turn-on-pending-delete)
- ;;;###autoload
- (define-obsolete-function-alias 'pending-delete-off 'turn-off-pending-delete)
-
- ;; FSF compatibility:
- ;;;###autoload
- (define-compatible-function-alias 'delete-selection-mode 'pending-delete-mode)
-
- ;; Compatibility and convenience:
- ;;;###autoload
- (defalias 'pending-delete 'pending-delete-mode)
-
-
- ;; The following code used to turn the mode on unconditionally.
- ;; However, this is a very bad idea -- since pending-del is
- ;; autoloaded, (turn-on-pending-delete) is as easy to add to `.emacs'
- ;; as (require 'pending-del) used to be.
-
- ;(pending-delete-on (eq pending-delete-verbose t))
-
- (provide 'pending-del)
-
- ;;; pending-del.el ends here
-