mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-23 07:19:15 +00:00
227 lines
7.5 KiB
EmacsLisp
227 lines
7.5 KiB
EmacsLisp
;;; xt-mouse.el --- support the mouse when emacs run in an xterm
|
|
|
|
;; Copyright (C) 1994, 2000, 2001, 2002, 2003,
|
|
;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
|
|
|
|
;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
|
|
;; Keywords: mouse, terminals
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs 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.
|
|
|
|
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
|
|
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
;; Boston, MA 02110-1301, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;; Enable mouse support when running inside an xterm.
|
|
|
|
;; This is actually useful when you are running X11 locally, but is
|
|
;; working on remote machine over a modem line or through a gateway.
|
|
|
|
;; It works by translating xterm escape codes into generic emacs mouse
|
|
;; events so it should work with any package that uses the mouse.
|
|
|
|
;; You don't have to turn off xterm mode to use the normal xterm mouse
|
|
;; functionality, it is still available by holding down the SHIFT key
|
|
;; when you press the mouse button.
|
|
|
|
;;; Todo:
|
|
|
|
;; Support multi-click -- somehow.
|
|
|
|
;;; Code:
|
|
|
|
(define-key function-key-map "\e[M" 'xterm-mouse-translate)
|
|
|
|
(defvar xterm-mouse-last)
|
|
|
|
;; Mouse events symbols must have an 'event-kind property with
|
|
;; the value 'mouse-click.
|
|
(dolist (event-type '(mouse-1 mouse-2 mouse-3
|
|
M-down-mouse-1 M-down-mouse-2 M-down-mouse-3))
|
|
(put event-type 'event-kind 'mouse-click))
|
|
|
|
(defun xterm-mouse-translate (event)
|
|
"Read a click and release event from XTerm."
|
|
(save-excursion
|
|
(save-window-excursion
|
|
(deactivate-mark)
|
|
(let* ((xterm-mouse-last)
|
|
(down (xterm-mouse-event))
|
|
(down-command (nth 0 down))
|
|
(down-data (nth 1 down))
|
|
(down-where (nth 1 down-data))
|
|
(down-binding (key-binding (if (symbolp down-where)
|
|
(vector down-where down-command)
|
|
(vector down-command))))
|
|
(is-click (string-match "^mouse" (symbol-name (car down)))))
|
|
|
|
(unless is-click
|
|
(unless (and (eq (read-char) ?\e)
|
|
(eq (read-char) ?\[)
|
|
(eq (read-char) ?M))
|
|
(error "Unexpected escape sequence from XTerm")))
|
|
|
|
(let* ((click (if is-click down (xterm-mouse-event)))
|
|
(click-command (nth 0 click))
|
|
(click-data (nth 1 click))
|
|
(click-where (nth 1 click-data)))
|
|
(if (memq down-binding '(nil ignore))
|
|
(if (and (symbolp click-where)
|
|
(consp click-where))
|
|
(vector (list click-where click-data) click)
|
|
(vector click))
|
|
(setq unread-command-events
|
|
(if (eq down-where click-where)
|
|
(list click)
|
|
(list
|
|
;; Cheat `mouse-drag-region' with move event.
|
|
(list 'mouse-movement click-data)
|
|
;; Generate a drag event.
|
|
(if (symbolp down-where)
|
|
0
|
|
(list (intern (format "drag-mouse-%d"
|
|
(+ 1 xterm-mouse-last)))
|
|
down-data click-data)))))
|
|
(if (and (symbolp down-where)
|
|
(consp down-where))
|
|
(vector (list down-where down-data) down)
|
|
(vector down))))))))
|
|
|
|
(defvar xterm-mouse-x 0
|
|
"Position of last xterm mouse event relative to the frame.")
|
|
|
|
(defvar xterm-mouse-y 0
|
|
"Position of last xterm mouse event relative to the frame.")
|
|
|
|
(defvar xt-mouse-epoch nil)
|
|
|
|
;; Indicator for the xterm-mouse mode.
|
|
|
|
(defun xterm-mouse-position-function (pos)
|
|
"Bound to `mouse-position-function' in XTerm mouse mode."
|
|
(setcdr pos (cons xterm-mouse-x xterm-mouse-y))
|
|
pos)
|
|
|
|
;; read xterm sequences above ascii 127 (#x7f)
|
|
(defun xterm-mouse-event-read ()
|
|
(let ((c (read-char)))
|
|
(if (< c 0)
|
|
(+ c #x8000000 128)
|
|
c)))
|
|
|
|
(defun xterm-mouse-truncate-wrap (f)
|
|
"Truncate with wrap-around."
|
|
(condition-case nil
|
|
;; First try the built-in truncate, in case there's no overflow.
|
|
(truncate f)
|
|
;; In case of overflow, do wraparound by hand.
|
|
(range-error
|
|
;; In our case, we wrap around every 3 days or so, so if we assume
|
|
;; a maximum of 65536 wraparounds, we're safe for a couple years.
|
|
;; Using a power of 2 makes rounding errors less likely.
|
|
(let* ((maxwrap (* 65536 2048))
|
|
(dbig (truncate (/ f maxwrap)))
|
|
(fdiff (- f (* 1.0 maxwrap dbig))))
|
|
(+ (truncate fdiff) (* maxwrap dbig))))))
|
|
|
|
|
|
(defun xterm-mouse-event ()
|
|
"Convert XTerm mouse event to Emacs mouse event."
|
|
(let* ((type (- (xterm-mouse-event-read) #o40))
|
|
(x (- (xterm-mouse-event-read) #o40 1))
|
|
(y (- (xterm-mouse-event-read) #o40 1))
|
|
;; Emulate timestamp information. This is accurate enough
|
|
;; for default value of mouse-1-click-follows-link (450msec).
|
|
(timestamp (xterm-mouse-truncate-wrap
|
|
(* 1000
|
|
(- (float-time)
|
|
(or xt-mouse-epoch
|
|
(setq xt-mouse-epoch (float-time)))))))
|
|
(mouse (intern
|
|
;; For buttons > 3, the release-event looks
|
|
;; differently (see xc/programs/xterm/button.c,
|
|
;; function EditorButton), and there seems to come in
|
|
;; a release-event only, no down-event.
|
|
(cond ((>= type 64)
|
|
(format "mouse-%d" (- type 60)))
|
|
((memq type '(8 9 10))
|
|
(setq xterm-mouse-last type)
|
|
(format "M-down-mouse-%d" (- type 7)))
|
|
((= type 11)
|
|
(format "mouse-%d" (- xterm-mouse-last 7)))
|
|
((= type 3)
|
|
(format "mouse-%d" (+ 1 xterm-mouse-last)))
|
|
(t
|
|
(setq xterm-mouse-last type)
|
|
(format "down-mouse-%d" (+ 1 type))))))
|
|
(w (window-at x y))
|
|
(ltrb (window-edges w))
|
|
(left (nth 0 ltrb))
|
|
(top (nth 1 ltrb)))
|
|
|
|
(setq xterm-mouse-x x
|
|
xterm-mouse-y y)
|
|
(setq
|
|
last-input-event
|
|
(list mouse
|
|
(let ((event (if w
|
|
(posn-at-x-y (- x left) (- y top) w t)
|
|
(append (list nil 'menu-bar)
|
|
(nthcdr 2 (posn-at-x-y x y))))))
|
|
(setcar (nthcdr 3 event) timestamp)
|
|
event)))))
|
|
|
|
;;;###autoload
|
|
(define-minor-mode xterm-mouse-mode
|
|
"Toggle XTerm mouse mode.
|
|
With prefix arg, turn XTerm mouse mode on iff arg is positive.
|
|
|
|
Turn it on to use Emacs mouse commands, and off to use xterm mouse commands.
|
|
This works in terminal emulators compatible with xterm. It only
|
|
works for simple uses of the mouse. Basically, only non-modified
|
|
single clicks are supported. When turned on, the normal xterm
|
|
mouse functionality for such clicks is still available by holding
|
|
down the SHIFT key while pressing the mouse button."
|
|
:global t :group 'mouse
|
|
(if xterm-mouse-mode
|
|
;; Turn it on
|
|
(unless window-system
|
|
(setq mouse-position-function #'xterm-mouse-position-function)
|
|
(turn-on-xterm-mouse-tracking))
|
|
;; Turn it off
|
|
(turn-off-xterm-mouse-tracking 'force)
|
|
(setq mouse-position-function nil)))
|
|
|
|
(defun turn-on-xterm-mouse-tracking ()
|
|
"Enable Emacs mouse tracking in xterm."
|
|
(if xterm-mouse-mode
|
|
(send-string-to-terminal "\e[?1000h")))
|
|
|
|
(defun turn-off-xterm-mouse-tracking (&optional force)
|
|
"Disable Emacs mouse tracking in xterm."
|
|
(if (or force xterm-mouse-mode)
|
|
(send-string-to-terminal "\e[?1000l")))
|
|
|
|
;; Restore normal mouse behaviour outside Emacs.
|
|
(add-hook 'suspend-hook 'turn-off-xterm-mouse-tracking)
|
|
(add-hook 'suspend-resume-hook 'turn-on-xterm-mouse-tracking)
|
|
(add-hook 'kill-emacs-hook 'turn-off-xterm-mouse-tracking)
|
|
|
|
(provide 'xt-mouse)
|
|
|
|
;; arch-tag: 84962d4e-fae9-4c13-a9d7-ef4925a4ac03
|
|
;;; xt-mouse.el ends here
|