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;;; jao-doc-session.el --- persistent document sessions -*- lexical-binding: t; -*-
;; Copyright (C) 2022 jao
;; Author: jao <mail@jao.io>
;; Keywords: docs
;; 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/>.
;;; Code:
(defvar jao-doc-session-file "~/.emacs.d/cache/doc-view-session.eld")
(defvar-local jao-doc-session--is-doc nil)
(defun jao-doc-session-is-doc (&optional buffer)
(buffer-local-value 'jao-doc-session--is-doc (or buffer (current-buffer))))
(defun jao-doc-session--read-file (file)
(let ((buff (find-file-noselect file)))
(ignore-errors
(with-current-buffer buff
(goto-char (point-min)))
(read buff))))
(defun jao-doc-session--save-to-file (file value)
(with-current-buffer (find-file-noselect file)
(erase-buffer)
(insert (format "%S" value))
(save-buffer)))
(defun jao-doc-session (&optional file)
(let ((file (or file jao-doc-session-file)))
(jao-doc-session--read-file file)))
(defun jao-doc-session-save (&optional skip-current force)
(interactive)
(let ((docs '())
(cb (and skip-current (current-buffer))))
(dolist (b (buffer-list))
(when-let (fn (and (not (eq cb b)) (jao-doc-session-is-doc b)))
(add-to-list 'docs fn)))
(when (or force (> (length docs) 0))
(jao-doc-session--save-to-file jao-doc-session-file docs))))
(defun jao-doc-session--save-session ()
(let ((inhibit-message t)
(message-log-max nil))
(when (not jao-doc-session-inhibit-save) (jao-doc-session-save))
t))
(defun jao-doc-session-mark (&optional path)
(setq jao-doc-session--is-doc (or path (buffer-file-name)))
(jao-doc-session--save-session))
(defun jao-doc-session--save-1 ()
(when (jao-doc-session-is-doc) (jao-doc-session-save t)))
(defvar jao-doc-session-inhibit-save nil)
(add-hook 'kill-emacs-query-functions #'jao-doc-session--save-session)
(add-hook 'kill-buffer-hook #'jao-doc-session--save-1)
(provide 'jao-doc-session)
;;; jao-doc-session.el ends here
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