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;;; gpm.el --- Support the mouse when emacs run on a Linux console.
;; Copyright (C) 1999 Free Software Foundation
;; Author: William Perry <wmperry@gnu.org>
;; Keywords: mouse, terminals
;; 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 GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
(defvar gpm-enabled-devices (make-hash-table :test 'eq
:size 13
:weakness 'key)
"A hash table of devices with GPM currently turned on.")
(defun gpm-mode (&optional arg device)
"Toggle GPM mouse mode.
With prefix arg, turn GPM mouse mode on if and only if arg is positive."
(interactive (list current-prefix-arg (selected-device)))
(cond
((null arg) ; Toggle
(if (gethash device gpm-enabled-devices)
(progn
(gpm-enable device nil)
(remhash device gpm-enabled-devices))
(gpm-enable device t)
(puthash device t gpm-enabled-devices)))
((> arg 0) ; Turn on
(gpm-enable device t)
(puthash device t gpm-enabled-devices))
((gethash device gpm-enabled-devices) ; Turn off
(gpm-enable device nil)
(remhash device gpm-enabled-devices))))
(defun turn-on-gpm-mouse-tracking (&optional device)
;; Enable mouse tracking on linux console
(gpm-mode 5 device))
(defun turn-off-gpm-mouse-tracking (&optional device)
;; Disable mouse tracking on linux console
(gpm-mode -5 device))
(defun gpm-create-device-hook (device)
(if (and (not noninteractive) ; Don't want to do this in batch mode
(fboundp 'gpm-enable) ; Must have C-level GPM support
(eq system-type 'linux) ; Must be running linux
(eq (device-type device) 'tty) ; on a tty
(equal "linux" (console-tty-terminal-type ; an a linux terminal type
(device-console device))))
(turn-on-gpm-mouse-tracking device)))
(defun gpm-delete-device-hook (device)
(if (and (not noninteractive) ; Don't want to do this in batch mode
(fboundp 'gpm-enable) ; Must have C-level GPM support
(eq system-type 'linux) ; Must be running linux
(eq (device-type device) 'tty) ; on a tty
(equal "linux" (console-tty-terminal-type ; an a linux terminal type
(device-console device))))
(turn-off-gpm-mouse-tracking device)))
;; Restore normal mouse behavior outside Emacs
(add-hook 'suspend-hook 'turn-off-gpm-mouse-tracking)
(add-hook 'suspend-resume-hook 'turn-on-gpm-mouse-tracking)
(add-hook 'create-device-hook 'gpm-create-device-hook)
(add-hook 'delete-device-hook 'gpm-delete-device-hook)
(provide 'gpm)
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