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;;; org-fc-type-double.el --- Front <-> Back Card Type -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Leon Rische
;; Author: Leon Rische <emacs@leonrische.me>
;; Url: https://www.leonrische.me/pages/org_flashcards.html
;; Package-requires: ((emacs "26.3") (org "9.3"))
;; Version: 0.0.1
;; 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:
;;
;; Variant of the normal card type that's also reviewed in the inverse
;; (back -> front) direction.
;;
;;; Code:
(defvar org-fc-type-double--overlay '())
(defun org-fc-type-double-init ()
"Mark headline as card of the double type."
(interactive)
(org-fc--init-card "double")
(org-fc-review-data-update '("front" "back")))
(defun org-fc-type-double-setup (position)
"Prepare POSITION of a double card for review."
(pcase position
("front" (org-fc-type-normal-setup position))
("back"
(outline-hide-subtree)
(if (org-fc-has-back-heading-p)
(org-fc-with-point-at-back-heading
(org-fc-show-latex)
(outline-show-entry))
(org-show-entry)
(setq org-fc-type-double--overlay (org-fc-hide-heading "[...]"))))
(_ (error "Invalid double position %s" position))))
(defun org-fc-type-double-flip ()
"Flip a double card."
(if org-fc-type-double--overlay
(delete-overlay org-fc-type-double--overlay))
(org-show-entry)
(org-show-children)
(org-fc-with-point-at-back-heading
(org-show-entry)
(org-show-children)
(org-fc-show-latex)))
(org-fc-register-type
'double
'org-fc-type-double-setup
'org-fc-type-double-flip
'org-fc-noop)
;;; Footer
(provide 'org-fc-type-double)
;;; org-fc-type-double.el ends here
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