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emacs-cat.el
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emacs-cat.el
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;;; emacs-cat.el --- A simplistic Emacs CAT (Computer Aided Translation) mode -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Marcin Borkowski
;; Author: Marcin Borkowski <mbork@mbork.pl>
;; Keywords: convenience
;; This program 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.
;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This is a very simple mode to aid in translations. As of now, it
;; only supports highlighting the currently translated sentence and
;; easily moving the highlight even without going to another
;; buffer/window.
;;; Code:
(provide 'emacs-cat)
;;; emacs-cat.el ends here
(defface emacs-cat-highlight-face '((t :background "#e7ede7"))
"Face for highlighting the currently translated sentence.")
(defvar emacs-cat-sentence-overlay nil
"The overlay to highlight the currently translated sentence.")
(defun emacs-cat-highlight-this-sentence ()
"Highlight the sentence at point using an overlay."
(interactive)
(save-excursion
(let ((sentence-end (progn (forward-sentence)
(point)))
(sentence-beginning (progn (backward-sentence)
(point))))
(if (overlayp emacs-cat-sentence-overlay)
(move-overlay emacs-cat-sentence-overlay sentence-beginning sentence-end (current-buffer))
(setq emacs-cat-sentence-overlay
(make-overlay sentence-beginning sentence-end))
(overlay-put emacs-cat-sentence-overlay 'face 'emacs-cat-highlight-face)))))
(defun emacs-cat-highlight-next-sentence ()
"Move the highlight to the next sentence."
(interactive)
(save-excursion
(set-buffer (overlay-buffer emacs-cat-sentence-overlay))
(goto-char (overlay-start emacs-cat-sentence-overlay))
(forward-sentence)
(emacs-cat-highlight-this-sentence)))
(defun emacs-cat-highlight-previous-sentence ()
"Move the highlight to the previous sentence."
(interactive)
(save-excursion
(set-buffer (overlay-buffer emacs-cat-sentence-overlay))
(goto-char (overlay-start emacs-cat-sentence-overlay))
(backward-sentence)
(emacs-cat-highlight-this-sentence)))
(defun emacs-cat-disable-sentence-highlighting ()
"Disable sentence highlighting."
(interactive)
(delete-overlay emacs-cat-sentence-overlay))
(setq emacs-cat-basic-map (make-sparse-keymap))
(define-key emacs-cat-basic-map (kbd "p") #'emacs-cat-highlight-previous-sentence)
(define-key emacs-cat-basic-map (kbd "n") #'emacs-cat-highlight-next-sentence)
(define-key emacs-cat-basic-map (kbd ".") #'emacs-cat-highlight-this-sentence)
(easy-mmode-defmap emacs-cat-mode-map
`((,(kbd "C-c .") . ,emacs-cat-basic-map))
"Keymap for `emacs-cat-mode'.")
(define-minor-mode emacs-cat-mode
"Toggle `emacs-cat-mode'."
:lighter " CAT"
:keymap emacs-cat-mode-map
:global t
(if emacs-cat-mode
(emacs-cat-highlight-this-sentence)
(emacs-cat-disable-sentence-highlighting)))