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;;; t-mouse.el --- mouse support within the text terminal -*- lexical-binding:t -*-
;; Author: Nick Roberts <nickrob@gnu.org>
;; Maintainer: emacs-devel@gnu.org
;; Keywords: mouse gpm linux
;; Copyright (C) 1994-1995, 1998, 2006-2023 Free Software Foundation,
;; Inc.
;; 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 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
;; 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. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This package provides access to mouse event as reported by the gpm-Linux
;; package. It tries to reproduce the functionality offered by Emacs under X.
;; The "gpm" server runs under Linux, so this package is rather
;; Linux-dependent.
;; The file, t-mouse.el was originally written by Alessandro Rubini and Ian T
;; Zimmerman, and Emacs communicated with gpm through a client program called
;; 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))
(defun gpm-mouse-tty-setup ()
(if gpm-mouse-mode (gpm-mouse-enable) (gpm-mouse-disable)))
;;;###autoload
(define-minor-mode gpm-mouse-mode
"Toggle mouse support in GNU/Linux consoles (GPM Mouse mode).
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))
(gpm-mouse-tty-setup))))
(when gpm-mouse-mode
(add-hook 'tty-setup-hook #'gpm-mouse-tty-setup)))
(provide 't-mouse)
;;; t-mouse.el ends here
|
