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88 lines
3.3 KiB
EmacsLisp
88 lines
3.3 KiB
EmacsLisp
;;; t-mouse.el --- mouse support within the text terminal -*- lexical-binding:t -*-
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;; Author: Nick Roberts <nickrob@gnu.org>
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: mouse gpm linux
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;; Copyright (C) 1994-1995, 1998, 2006-2021 Free Software Foundation,
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;; Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This package provides access to mouse event as reported by the gpm-Linux
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;; package. It tries to reproduce the functionality offered by Emacs under X.
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;; The "gpm" server runs under Linux, so this package is rather
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;; Linux-dependent.
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;; The file, t-mouse.el was originally written by Alessandro Rubini and Ian T
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;; Zimmerman, and Emacs communicated with gpm through a client program called
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;; mev. Now the interface with gpm is directly through a Unix socket, so this
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;; file is reduced to a single minor mode macro call.
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;;
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;;; Code:
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;; Prevent warning when compiling in an Emacs without gpm support.
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(declare-function gpm-mouse-start "term.c" ())
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(defun gpm-mouse-enable ()
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"Try to enable gpm mouse support on the current terminal."
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(let ((activated nil))
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(unwind-protect
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(progn
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(unless (fboundp 'gpm-mouse-start)
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(error "Emacs must be built with Gpm to use this mode"))
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(when gpm-mouse-mode
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(gpm-mouse-start)
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(set-terminal-parameter nil 'gpm-mouse-active t)
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(setq activated t)))
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;; If something failed to turn it on, try to turn it off as well,
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;; just in case.
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(unless activated (gpm-mouse-disable)))))
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(defun gpm-mouse-disable ()
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"Try to disable gpm mouse support on the current terminal."
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(when (fboundp 'gpm-mouse-stop)
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(gpm-mouse-stop))
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(set-terminal-parameter nil 'gpm-mouse-active nil))
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;;;###autoload
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(define-minor-mode gpm-mouse-mode
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"Toggle mouse support in GNU/Linux consoles (GPM Mouse mode).
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This allows the use of the mouse when operating on a GNU/Linux console,
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in the same way as you can use the mouse under X11.
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It relies on the `gpm' daemon being activated.
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Note that when `gpm-mouse-mode' is enabled, you cannot use the
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mouse to transfer text between Emacs and other programs which use
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GPM. This is due to limitations in GPM and the Linux kernel."
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:global t :group 'mouse :init-value t
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(dolist (terminal (terminal-list))
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(when (and (eq t (terminal-live-p terminal))
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(not (eq gpm-mouse-mode
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(terminal-parameter terminal 'gpm-mouse-active))))
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;; Simulate selecting a terminal by selecting one of its frames ;-(
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(with-selected-frame (car (frames-on-display-list terminal))
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(if gpm-mouse-mode (gpm-mouse-enable) (gpm-mouse-disable))))))
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(provide 't-mouse)
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;;; t-mouse.el ends here
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