72 lines
2.5 KiB
EmacsLisp
72 lines
2.5 KiB
EmacsLisp
;;; upcase-mode.el --- Upcase all input -*- lexical-binding: t; -*-
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;; Copyright (C) 2014 Tom Willemse
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;; Author: Tom Willemse <tom@ryuslash.org>
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;; Keywords: convenience
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;; Version: 0.1.0
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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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; The main entry point for this module, `upcase-transient-mode',
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;; temporarily enables a keymap that causes all input to be made
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;; upper-case. This map stays active as long as the result of
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;; `upcase' applied to the input is different from the input itself,
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;; or if there is a value in `upcase-character-map' for the input.
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;;; Code:
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(defvar upcase-transient-map
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(let ((map (make-sparse-keymap)))
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(define-key map [remap self-insert-command] #'upcase-self-insert-command)
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map)
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"The transient keymap that will take effect.")
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(defvar upcase-character-map
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#s(hash-table data (?- ?_))
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"Extra characters to switch.")
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(defun upcase-self-insert-command ()
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"Wrap `self-insert-command' to upcase the input character.
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This also translates keys from the variable
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`upcase-character-map' to values from the same variable."
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(interactive)
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(let ((last-command-event
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(gethash last-command-event upcase-character-map
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(upcase last-command-event))))
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(self-insert-command 1)))
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(defun upcase-able-p ()
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"Check to see if the current input can be upcased.
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Upcased can mean either the result of `upcase' being different
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from the original or having a value in `upcase-character-map'."
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(let ((case-fold-search nil))
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(or (not (char-equal
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last-command-event (capitalize last-command-event)))
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(gethash last-command-event upcase-character-map))))
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;;;###autoload
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(defun upcase-transient-mode ()
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"Set a transient map that upcases any input.
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This map stays active as long as the input can be upcased."
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(interactive)
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(set-transient-map upcase-transient-map #'upcase-able-p))
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(provide 'upcase-mode)
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;;; upcase-mode.el ends here
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