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;; jao-emms-random-album.el -- play random albums in emms
;; Copyright (C) 2009, 2010, 2017, 2018, 2020 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Sat Jul 04, 2009 13:06
;; This file 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 file 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 <http://www.gnu.org/licenses/>.
(require 'emms)
(require 'jao-minibuffer)
(defvar jao-emms-random-album-p t)
(defvar jao-emms-random-lines nil)
(defvar jao-emms-random-lines-file
(expand-file-name "~/.emacs.d/random-lines"))
(defvar jao-emms-random-album-notify-p t)
(defvar jao-emms-random-album-notify-icon nil)
(defun jao-emms-random-lines ()
(or jao-emms-random-lines
(and (file-exists-p jao-emms-random-lines-file)
(with-current-buffer
(find-file-noselect jao-emms-random-lines-file)
(goto-char (point-min))
(setq jao-emms-random-lines (read (current-buffer)))))
(dotimes (n (1- (line-number-at-pos (point-max)))
jao-emms-random-lines)
(push (1+ n) jao-emms-random-lines))))
(defun jao-emms-random-lines-save ()
(with-current-buffer (find-file-noselect jao-emms-random-lines-file)
(delete-region (point-min) (point-max))
(insert (format "%s\n" jao-emms-random-lines))
(save-buffer)))
(defun jao-emms-goto-random-album ()
(let* ((pos (random (length (jao-emms-random-lines))))
(line (nth pos jao-emms-random-lines)))
(setq jao-emms-random-lines (remove line jao-emms-random-lines))
(jao-emms-random-lines-save)
(goto-line line)))
(defun jao-emms-next-noerror ()
(interactive)
(when emms-player-playing-p
(error "A track is already being played"))
(cond (emms-repeat-track
(emms-start))
((condition-case nil
(progn
(emms-playlist-current-select-next)
t)
(error nil))
(emms-start))
(t
(if jao-emms-random-album-p
(jao-emms-random-album-next)
(message "No next track in playlist")))))
;; User interface
;;;###autoload
(defun jao-emms-random-album-start ()
(interactive)
(setq jao-emms-random-album-p t)
(jao-emms-random-album-next))
;;;###autoload
(defun jao-emms-random-album-stop ()
(interactive)
(setq jao-emms-random-album-p nil)
(emms-stop))
;;;###autoload
(defun jao-emms-random-album-toggle ()
(interactive)
(setq jao-emms-random-album-p (not jao-emms-random-album-p))
(message "Random album %s"
(if jao-emms-random-album-p "enabled" "disabled")))
;;;###autoload
(defun jao-emms-random-album-next ()
(interactive)
(save-excursion
(ignore-errors (emms-browser-clear-playlist))
(emms-browse-by-album)
(jao-emms-goto-random-album)
(let ((album (substring-no-properties (thing-at-point 'line) 0 -1)))
(emms-browser-add-tracks-and-play)
(when jao-emms-random-album-notify-p
(jao-notify album "Next album" jao-emms-random-album-notify-icon)))
(emms-browser-bury-buffer)
(jao-minibuffer-refresh)))
;;;###autoload
(defun jao-emms-random-album-reset ()
(interactive)
(setq jao-emms-random-lines nil)
(jao-emms-random-lines-save))
(setq emms-player-next-function 'jao-emms-next-noerror)
(provide 'jao-emms-random-album)
;;; jao-emms-random-album.el ends here
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