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;;; emms-playing-time.el --- Display emms playing time on mode line
;; Copyright (C) 2005, 2006 Free Software Foundation, Inc.
;; Author: William Xu <william.xwl@gmail.com>
;; This file is part of EMMS.
;; EMMS 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 2, or (at your option)
;; any later version.
;;
;; EMMS 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 EMMS; if not, write to the Free Software Foundation,
;; Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
;;; Commentary:
;; Display playing time on mode line, it looks like: 01:32/04:09.
;; Put this file into your load-path and the following into your
;; ~/.emacs:
;; (require 'emms-playing-time)
;;
;; Then either `M-x emms-playing-time-enable' or add
;; (emms-playing-time 1) in your .emacs to enable.
;;; Code:
(eval-when-compile (require 'cl))
(require 'emms-info)
(require 'emms-player-simple)
;;; Customizations
(defgroup emms-playing-time nil
"Playing-time module for EMMS."
:group 'emms)
(defcustom emms-playing-time-display-short-p nil
"If non-nil, only display elapsed time, don't display total
playing time. e.g., display 02:37 instead of 02:37/05:49. You
should enable `emms-playing-time-display-p' first, though."
:type 'boolean
:group 'emms-playing-time)
(defcustom emms-playing-time-display-format " %s "
"Format used for displaying playing time."
:type 'string
:group 'emms-playing-time)
;;; Emms Playing Time
(defvar emms-playing-time-display-p nil
"Whether emms playing time is enabled or not")
(defvar emms-playing-time 0
"How long has EMMS run up to now.")
(defvar emms-playing-time-string "")
(defvar emms-playing-time-display-timer nil)
(defun emms-playing-time-start ()
"Get ready for display playing time."
(setq emms-playing-time 0)
(unless emms-playing-time-display-timer
(setq emms-playing-time-display-timer
(run-at-time t 1 'emms-playing-time-display))))
(defun emms-playing-time-stop ()
"Remove playing time on the mode line."
(if (or (not emms-player-paused-p)
emms-player-stopped-p)
(progn
(setq emms-playing-time-string "")
(force-mode-line-update)))
(emms-cancel-timer emms-playing-time-display-timer)
(setq emms-playing-time-display-timer nil))
(defun emms-playing-time-pause ()
"Pause playing time."
(if emms-player-paused-p
(emms-playing-time-stop)
(unless emms-playing-time-display-timer
(setq emms-playing-time-display-timer
(run-at-time t 1 'emms-playing-time-display)))))
(defun emms-playing-time-seek (sec)
"Seek forward or backward SEC playing time."
(setq emms-playing-time (+ emms-playing-time sec))
(when (< emms-playing-time 0) ; back to start point
(setq emms-playing-time 0)))
(defun emms-playing-time-set (sec)
"Set the playing time to SEC."
(setq emms-playing-time sec)
(when (< emms-playing-time 0) ; back to start point
(setq emms-playing-time 0)))
(defun emms-playing-time (arg)
"Turn on emms playing time if ARG is positive, off otherwise."
(interactive "p")
(if (and arg (> arg 0))
(progn
(setq emms-playing-time-display-p t)
(emms-playing-time-mode-line)
(add-hook 'emms-player-started-hook 'emms-playing-time-start)
(add-hook 'emms-player-stopped-hook 'emms-playing-time-stop)
(add-hook 'emms-player-finished-hook 'emms-playing-time-stop)
(add-hook 'emms-player-paused-hook 'emms-playing-time-pause)
(add-hook 'emms-player-seeked-functions 'emms-playing-time-seek)
(add-hook 'emms-player-time-set-functions 'emms-playing-time-set))
(setq emms-playing-time-display-p nil)
(emms-playing-time-stop)
(emms-playing-time-restore-mode-line)
(remove-hook 'emms-player-started-hook 'emms-playing-time-start)
(remove-hook 'emms-player-stopped-hook 'emms-playing-time-stop)
(remove-hook 'emms-player-finished-hook 'emms-playing-time-stop)
(remove-hook 'emms-player-paused-hook 'emms-playing-time-pause)
(remove-hook 'emms-player-seeked-functions 'emms-playing-time-seek)
(remove-hook 'emms-player-time-set-functions 'emms-playing-time-set)))
;;;###autoload
(defun emms-playing-time-enable ()
"Enable displaying emms playing time on mode line."
(interactive)
(emms-playing-time 1)
(message "emms playing time enabled"))
;;;###autoload
(defun emms-playing-time-disable ()
"Disable displaying emms playing time on mode line."
(interactive)
(emms-playing-time -1)
(message "emms playing time disabled"))
;;;###autoload
(defun emms-playing-time-toggle ()
"Toggle displaying emms playing time on mode line."
(interactive)
(if emms-playing-time-display-p
(emms-playing-time-disable)
(emms-playing-time-enable)))
(defun emms-playing-time-display ()
"Display playing time on the mode line."
(setq emms-playing-time (1+ emms-playing-time))
(let* ((min (/ emms-playing-time 60))
(sec (% emms-playing-time 60))
(total-playing-time
(or (emms-track-get
(emms-playlist-current-selected-track)
'info-playing-time)
0))
(total-min-only (/ total-playing-time 60))
(total-sec-only (% total-playing-time 60)))
(setq emms-playing-time-string
(format
emms-playing-time-display-format
(emms-replace-regexp-in-string
" " "0"
(if (or emms-playing-time-display-short-p
;; unable to get total playing-time
(eq total-playing-time 0))
(format "%2d:%2d" min sec)
(format "%2d:%2d/%2s:%2s"
min sec total-min-only total-sec-only)))))
(force-mode-line-update)))
(defun emms-playing-time-mode-line ()
"Add playing time to the mode line."
(or global-mode-string (setq global-mode-string '("")))
(unless (member 'emms-playing-time-string
global-mode-string)
(setq global-mode-string
(append global-mode-string
'(emms-playing-time-string)))))
(defun emms-playing-time-restore-mode-line ()
"Restore the mode line."
(setq global-mode-string
(remove 'emms-playing-time-string global-mode-string))
(force-mode-line-update))
(provide 'emms-playing-time)
;;; emms-playing-time.el ends here
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