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72 lines
2.3 KiB
72 lines
2.3 KiB
;;; mode-line-bell.el --- Flash the mode line instead of ringing the bell -*- lexical-binding: t; -*-
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;; Copyright (C) 2018 Steve Purcell
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;; Author: Steve Purcell <steve@sanityinc.com>
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;; Keywords: convenience
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;; Package-Version: 0.2
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;; Package-Commit: 4985ba42f5a19f46ddbf9b3622453a9694995ce5
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;; This program 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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;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Enable the global minor mode `mode-line-bell-mode' to set
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;; `ring-bell-function' to a function that will briefly flash the mode
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;; line when the bell is rung.
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;;; Code:
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(defgroup mode-line-bell nil
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"Flash the mode line instead of ringing the bell."
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:group 'frames)
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(defcustom mode-line-bell-flash-time 0.05
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"Length of time to flash the mode line when the bell is rung."
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:type 'float
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:safe 'floatp)
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(defvar mode-line-bell--flashing nil
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"If non-nil, the mode line is currently flashing.")
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(defun mode-line-bell--begin-flash ()
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"Begin flashing the mode line."
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(unless mode-line-bell--flashing
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(invert-face 'mode-line)
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(setq mode-line-bell--flashing t)))
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(defun mode-line-bell--end-flash ()
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"Finish flashing the mode line."
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(when mode-line-bell--flashing
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(invert-face 'mode-line)
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(setq mode-line-bell--flashing nil)))
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;;;###autoload
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(defun mode-line-bell-flash ()
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"Flash the mode line momentarily."
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(unless mode-line-bell--flashing
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(run-with-timer mode-line-bell-flash-time nil 'mode-line-bell--end-flash)
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(mode-line-bell--begin-flash)))
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;;;###autoload
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(define-minor-mode mode-line-bell-mode
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"Flash the mode line instead of ringing the bell."
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:lighter nil
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:global t
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(setq-default ring-bell-function (when mode-line-bell-mode
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'mode-line-bell-flash)))
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(provide 'mode-line-bell)
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;;; mode-line-bell.el ends here
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