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1 | ;;; s-region.el --- set region using shift key. |
2 | ;;; Copyright (C) 1994 Free Software Foundation, Inc. | |
3 | ||
4 | ;; Author: Morten Welinder (terra@diku.dk) | |
5 | ;; Version: 1.00 | |
6 | ;; Keywords: terminals | |
7 | ;; Favourite-brand-of-beer: None, I hate beer. | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
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. | |
15 | ||
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. | |
20 | ||
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 | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; Having loaded this code you can set the region by holding down the | |
28 | ;; shift key and move the cursor to the other end of the region. The | |
29 | ;; functionallity provided by this code is similar to that provided by | |
30 | ;; the editors of Borland International's compilers for ms-dos. | |
31 | ||
32 | ;; Currently, s-region-move may be bound only to events that are vectors | |
33 | ;; of length one and whose last element is a symbol. Also, the functions | |
34 | ;; that are given this kind of overlay should be (interactive "p") | |
35 | ;; functions. | |
36 | ||
37 | ;; C-insert is bound to copy-region-as-kill | |
38 | ;; S-delete is bound to kill-region | |
39 | ;; S-insert is bound to yank | |
40 | ||
41 | ;;; Code: | |
42 | ||
43 | (defvar s-region-overlay (make-overlay 1 1)) | |
44 | (overlay-put s-region-overlay 'face 'region) | |
45 | (overlay-put s-region-overlay 'priority 1000000) ; for hilit19 | |
46 | ||
47 | (defun s-region-unshift (key) | |
48 | "Remove shift modifier from last keypress KEY and return that as a key." | |
49 | (if (vectorp key) | |
50 | (let ((last (aref key (1- (length key))))) | |
51 | (if (symbolp last) | |
52 | (let* ((keyname (symbol-name last)) | |
53 | (pos (string-match "S-" keyname))) | |
54 | (if pos | |
55 | ;; We skip all initial parts of the event assuming that | |
56 | ;; those are setting up the prefix argument to the command. | |
57 | (vector (intern (concat (substring keyname 0 pos) | |
58 | (substring keyname (+ 2 pos))))) | |
59 | (error "Non-shifted key: %S" key))) | |
60 | (error "Key does not end in a symbol: %S" key))) | |
61 | (error "Non-vector key: %S" key))) | |
62 | ||
63 | (defun s-region-move (&rest arg) | |
64 | "This is an overlay function to point-moving keys." | |
65 | (interactive "p") | |
66 | (if (if mark-active (not (equal last-command 's-region-move)) t) | |
67 | (set-mark-command nil) | |
68 | (message "")) ; delete the "Mark set" message | |
69 | (apply (key-binding (s-region-unshift (this-command-keys))) arg) | |
70 | (move-overlay s-region-overlay (mark) (point) (current-buffer)) | |
71 | (sit-for 1) | |
72 | (delete-overlay s-region-overlay)) | |
73 | ||
74 | (defun s-region-bind (keylist &optional map) | |
75 | "Bind keys in KEYLIST to `s-region-move'. | |
76 | Each key in KEYLIST is bound to `s-region-move' | |
77 | provided it is already bound to some command or other. | |
78 | Optional second argument MAP specifies keymap to | |
79 | add binding to, defaulting to global keymap." | |
80 | (or map (setq map global-map)) | |
81 | (while keylist | |
82 | (if (commandp (key-binding (car keylist))) | |
83 | (define-key | |
84 | map | |
85 | (vector (intern (concat "S-" (symbol-name (aref (car keylist) 0))))) | |
86 | 's-region-move)) | |
87 | (setq keylist (cdr keylist)))) | |
88 | ||
89 | (s-region-bind | |
90 | (list [right] [left] [up] [down] | |
91 | [C-left] [C-right] [C-up] [C-down] | |
92 | [M-left] [M-right] [M-up] [M-down] | |
93 | [next] [previous] [home] [end] | |
94 | [C-next] [C-previous] [C-home] [C-end] | |
95 | [M-next] [M-previous] [M-home] [M-end])) | |
96 | ||
97 | (global-set-key [C-insert] 'copy-region-as-kill) | |
98 | (global-set-key [S-delete] 'kill-region) | |
99 | (global-set-key [S-insert] 'yank) | |
100 | ||
101 | (provide 's-region) | |
102 | ||
103 | ;; s-region.el ends here. |