This commit was manufactured by cvs2svn to create branch 'chise-r21-4-18'.

[chise/xemacs-chise.git-] / lisp / gpm.el

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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)