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fe3acbd4 | 1 | ;;; xt-mouse.el --- Support the mouse when emacs run in an xterm. |
b578f267 | 2 | |
fe3acbd4 RS |
3 | ;; Copyright (C) 1994 Free Software Foundation |
4 | ||
3efc86ef | 5 | ;; Author: Per Abrahamsen <abraham@dina.kvl.dk> |
fe3acbd4 RS |
6 | ;; Keywords: mouse, terminals |
7 | ||
b578f267 EN |
8 | ;; This file is part of GNU Emacs. |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
fe3acbd4 RS |
11 | ;; it under the terms of the GNU General Public License as published by |
12 | ;; the Free Software Foundation; either version 2, or (at your option) | |
13 | ;; any later version. | |
b578f267 EN |
14 | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
fe3acbd4 RS |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
b578f267 | 19 | |
fe3acbd4 | 20 | ;; You should have received a copy of the GNU General Public License |
b578f267 EN |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | ;; Boston, MA 02111-1307, USA. | |
fe3acbd4 RS |
24 | |
25 | ;;; Comments: | |
26 | ||
387a2345 | 27 | ;; Enable mouse support when running inside an xterm or Linux console. |
fe3acbd4 RS |
28 | |
29 | ;; This is actually useful when you are running X11 locally, but is | |
30 | ;; working on remote machine over a modem line or through a gateway. | |
31 | ||
32 | ;; It works by translating xterm escape codes into generic emacs mouse | |
33 | ;; events so it should work with any package that uses the mouse. | |
34 | ||
387a2345 RS |
35 | ;; The xterm mouse escape codes are supposedly also supported by the |
36 | ;; Linux console, but I have not been able to verify this. | |
37 | ||
38 | ;; You don't have to turn off xterm mode to use the normal xterm mouse | |
39 | ;; functionality, it is still available by holding down the SHIFT key | |
40 | ;; when you press the mouse button. | |
41 | ||
fe3acbd4 RS |
42 | ;;; Todo: |
43 | ||
44 | ;; Support multi-click -- somehow. | |
45 | ||
46 | ;; Clicking on the mode-line does not work, although it should. | |
47 | ||
48 | ;;; Code: | |
49 | ||
fe3acbd4 RS |
50 | (define-key function-key-map "\e[M" 'xterm-mouse-translate) |
51 | ||
599431ab RS |
52 | (defvar xterm-mouse-last) |
53 | ||
fe3acbd4 RS |
54 | (defun xterm-mouse-translate (event) |
55 | ;; Read a click and release event from XTerm. | |
56 | (save-excursion | |
57 | (save-window-excursion | |
58 | (deactivate-mark) | |
599431ab | 59 | (let* ((xterm-mouse-last) |
cec01ccb RS |
60 | (down (xterm-mouse-event)) |
61 | (down-command (nth 0 down)) | |
62 | (down-data (nth 1 down)) | |
63 | (down-where (nth 1 down-data)) | |
64 | (down-binding (key-binding (if (symbolp down-where) | |
65 | (vector down-where down-command) | |
66 | (vector down-command))))) | |
fe3acbd4 RS |
67 | (or (and (eq (read-char) ?\e) |
68 | (eq (read-char) ?\[) | |
69 | (eq (read-char) ?M)) | |
70 | (error "Unexpected escape sequence from XTerm")) | |
cec01ccb RS |
71 | (let* ((click (xterm-mouse-event)) |
72 | (click-command (nth 0 click)) | |
73 | (click-data (nth 1 click)) | |
74 | (click-where (nth 1 click-data))) | |
75 | (if (memq down-binding '(nil ignore)) | |
76 | (if (and (symbolp click-where) | |
77 | (not (eq 'menu-bar click-where))) | |
78 | (vector (list click-where click-data) click) | |
79 | (vector click)) | |
80 | (setq unread-command-events | |
81 | (if (eq down-where click-where) | |
82 | (list click) | |
83 | (list | |
84 | ;; Cheat `mouse-drag-region' with move event. | |
85 | (list 'mouse-movement click-data) | |
86 | ;; Generate a drag event. | |
87 | (if (symbolp down-where) | |
88 | 0 | |
599431ab | 89 | (list (intern (concat "drag-mouse-" (+ 1 xterm-mouse-last))) |
cec01ccb RS |
90 | down-data click-data)) |
91 | ))) | |
92 | (if (and (symbolp down-where) | |
93 | (not (eq 'menu-bar down-where))) | |
94 | (vector (list down-where down-data) down) | |
95 | (vector down)))))))) | |
96 | ||
97 | (defvar xterm-mouse-x 0 | |
98 | "Position of last xterm mouse event relative to the frame.") | |
99 | ||
100 | (defvar xterm-mouse-y 0 | |
101 | "Position of last xterm mouse event relative to the frame.") | |
102 | ||
103 | (defadvice mouse-position (around xterm-mouse activate) | |
104 | "Use last key from xterm-mouse-mode if available." | |
105 | (let ((answer ad-do-it)) | |
106 | (setq ad-return-value | |
107 | (if xterm-mouse-mode | |
108 | (cons (car answer) (cons xterm-mouse-x xterm-mouse-y)) | |
109 | answer)))) | |
fe3acbd4 RS |
110 | |
111 | (defun xterm-mouse-event () | |
112 | ;; Convert XTerm mouse event to Emacs mouse event. | |
113 | (let* ((type (- (read-char) ? )) | |
114 | (x (- (read-char) ? 1)) | |
115 | (y (- (read-char) ? 1)) | |
116 | (point (cons x y)) | |
117 | (window (window-at x y)) | |
cec01ccb RS |
118 | (where (if window |
119 | (coordinates-in-window-p point window) | |
120 | 'menu-bar)) | |
fe3acbd4 RS |
121 | (pos (if (consp where) |
122 | (progn | |
123 | (select-window window) | |
124 | (goto-char (window-start window)) | |
125 | (move-to-window-line (cdr where)) | |
126 | (move-to-column (+ (car where) (current-column) | |
c27f1e01 RS |
127 | (if (string-match "\\` \\*Minibuf" |
128 | (buffer-name)) | |
129 | (- (minibuffer-prompt-width)) | |
130 | 0) | |
fe3acbd4 RS |
131 | (max 0 (1- (window-hscroll))))) |
132 | (point)) | |
133 | where)) | |
134 | (mouse (intern (if (eq type 3) | |
599431ab RS |
135 | (concat "mouse-" (+ 1 xterm-mouse-last)) |
136 | (setq xterm-mouse-last type) | |
fe3acbd4 | 137 | (concat "down-mouse-" (+ 1 type)))))) |
cec01ccb RS |
138 | (setq xterm-mouse-x x |
139 | xterm-mouse-y y) | |
fe3acbd4 RS |
140 | (list mouse |
141 | (list window pos point | |
142 | (/ (nth 2 (current-time)) 1000))))) | |
143 | ||
144 | ;; Indicator for the xterm-mouse mode. | |
145 | (defvar xterm-mouse-mode nil) | |
146 | ||
147 | (or (assq 'xterm-mouse-mode minor-mode-alist) | |
148 | (setq minor-mode-alist | |
149 | (cons '(xterm-mouse-mode (" Mouse")) minor-mode-alist))) | |
150 | ||
151 | ;;;###autoload | |
152 | (defun xterm-mouse-mode (arg) | |
153 | "Toggle XTerm mouse mode. | |
154 | With prefix arg, turn XTerm mouse mode on iff arg is positive. | |
155 | ||
156 | Turn it on to use emacs mouse commands, and off to use xterm mouse commands." | |
157 | (interactive "P") | |
158 | (if (or (and (null arg) xterm-mouse-mode) | |
159 | (<= (prefix-numeric-value arg) 0)) | |
160 | ;; Turn it off | |
161 | (if xterm-mouse-mode | |
162 | (progn | |
163 | (turn-off-xterm-mouse-tracking) | |
164 | (setq xterm-mouse-mode nil) | |
165 | (set-buffer-modified-p (buffer-modified-p)))) | |
166 | ;;Turn it on | |
167 | (if xterm-mouse-mode | |
168 | () | |
169 | (setq xterm-mouse-mode t) | |
170 | (turn-on-xterm-mouse-tracking) | |
171 | (set-buffer-modified-p (buffer-modified-p))))) | |
172 | ||
173 | (defun turn-on-xterm-mouse-tracking () | |
174 | ;; Enable emacs mouse tracking in xterm. | |
175 | (if xterm-mouse-mode | |
176 | (send-string-to-terminal "\e[?1000h"))) | |
177 | ||
178 | (defun turn-off-xterm-mouse-tracking () | |
179 | ;; Disable disable emacs mouse tracking in xterm. | |
180 | (if xterm-mouse-mode | |
181 | (send-string-to-terminal "\e[?1000l"))) | |
182 | ||
183 | ;; Restore normal mouse behaviour outside Emacs. | |
184 | (add-hook 'suspend-hook 'turn-off-xterm-mouse-tracking) | |
185 | (add-hook 'suspend-resume-hook 'turn-on-xterm-mouse-tracking) | |
186 | (add-hook 'kill-emacs-hook 'turn-off-xterm-mouse-tracking) | |
187 | ||
188 | (provide 'xt-mouse) | |
189 | ||
190 | ;;; xt-mouse.el ends here |