X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/70360d0cab4f5e9fa351cd131e45fa86401896c0..dd92b5f5047931f6020045ce47360b62d1c2cb72:/lisp/t-mouse.el

diff --git a/lisp/t-mouse.el b/lisp/t-mouse.el
index c48b56d620..5ea1bdd344 100644
--- a/lisp/t-mouse.el
+++ b/lisp/t-mouse.el
@@ -1,17 +1,18 @@
 ;;; t-mouse.el --- mouse support within the text terminal
 
 ;; Author: Nick Roberts <nickrob@gnu.org>
-;; Maintainer: FSF
+;; Maintainer: emacs-devel@gnu.org
 ;; Keywords: mouse gpm linux
 
-;; Copyright (C) 1994, 1995, 1998, 2006, 2007 Free Software Foundation, Inc.
+;; Copyright (C) 1994-1995, 1998, 2006-2016 Free Software Foundation,
+;; Inc.
 
 ;; This file is part of GNU Emacs.
 
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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.
+;; the Free Software Foundation, either version 3 of the License, 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
@@ -19,9 +20,7 @@
 ;; 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.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 
 ;;; Commentary:
 
@@ -35,35 +34,59 @@
 ;; mev.  Now the interface with gpm is directly through a Unix socket, so this
 ;; file is reduced to a single minor mode macro call.
 
-;; 
+;;
 
 ;;; Code:
 
+;; Prevent warning when compiling in an Emacs without gpm support.
+(declare-function gpm-mouse-start "term.c" ())
+
+(defun gpm-mouse-enable ()
+  "Try to enable gpm mouse support on the current terminal."
+  (let ((activated nil))
+    (unwind-protect
+        (progn
+          (unless (fboundp 'gpm-mouse-start)
+            (error "Emacs must be built with Gpm to use this mode"))
+          (when gpm-mouse-mode
+            (gpm-mouse-start)
+            (set-terminal-parameter nil 'gpm-mouse-active t)
+            (setq activated t)))
+      ;; If something failed to turn it on, try to turn it off as well,
+      ;; just in case.
+      (unless activated (gpm-mouse-disable)))))
+
+(defun gpm-mouse-disable ()
+  "Try to disable gpm mouse support on the current terminal."
+  (when (fboundp 'gpm-mouse-stop)
+    (gpm-mouse-stop))
+  (set-terminal-parameter nil 'gpm-mouse-active nil))
+
 ;;;###autoload
-(define-minor-mode t-mouse-mode
-  "Toggle t-mouse mode to use the mouse in Linux consoles.
-With prefix arg, turn t-mouse mode on iff arg is positive.
-
-This allows the use of the mouse when operating on a Linux console, in the
-same way as you can use the mouse under X11.
-It requires the `mev' program, part of the `gpm' utilities."
-  :global t :group 'mouse
-  (if window-system
-      (error "t-mouse only works in the console on GNU/Linux")
-    (if t-mouse-mode
-	(progn
-	  (unless (fboundp 'term-open-connection)
-	    (progn
-	      (setq t-mouse-mode nil)
-	      (error "Emacs must be built with Gpm to use this mode")))
-	  (unless (term-open-connection)
-	    (progn
-	      (setq t-mouse-mode nil)
-	      (error "Can't open mouse connection"))))
-      ;; Turn it off
-      (term-close-connection))))
+(define-obsolete-function-alias 't-mouse-mode 'gpm-mouse-mode "23.1")
+;;;###autoload
+(define-minor-mode gpm-mouse-mode
+  "Toggle mouse support in GNU/Linux consoles (GPM Mouse mode).
+With a prefix argument ARG, enable GPM Mouse mode if ARG is
+positive, and disable it otherwise.  If called from Lisp, enable
+the mode if ARG is omitted or nil.
+
+This allows the use of the mouse when operating on a GNU/Linux console,
+in the same way as you can use the mouse under X11.
+It relies on the `gpm' daemon being activated.
+
+Note that when `gpm-mouse-mode' is enabled, you cannot use the
+mouse to transfer text between Emacs and other programs which use
+GPM.  This is due to limitations in GPM and the Linux kernel."
+  :global t :group 'mouse :init-value t
+  (dolist (terminal (terminal-list))
+    (when (and (eq t (terminal-live-p terminal))
+               (not (eq gpm-mouse-mode
+                        (terminal-parameter terminal 'gpm-mouse-active))))
+      ;; Simulate selecting a terminal by selecting one of its frames ;-(
+      (with-selected-frame (car (frames-on-display-list terminal))
+        (if gpm-mouse-mode (gpm-mouse-enable) (gpm-mouse-disable))))))
 
 (provide 't-mouse)
 
-;; arch-tag: a63163b3-bfbe-4eb2-ab4f-201cd164b05d
 ;;; t-mouse.el ends here