+ (emus--with-library
+ (setq emus-state 'stopped)
+ (emus--update-record emus-current-record)
+ (emus-send-cmd "s")))
+
+(defun emus-playpause ()
+ (interactive)
+ (emus--with-library
+ (when emus-current-record
+ (if (eq emus-state 'stopped)
+ (emus-play-record emus-current-record)
+ (emus-send-cmd "p")
+ (pcase emus-state
+ ((or 'paused 'stopped) (setq emus-state 'playing))
+ ('playing (setq emus-state 'paused)))
+ (unless (eq emus-state 'paused)))
+ (emus--update-record emus-current-record))))
+
+(defvar emus-current-volume 100)
+
+(defun emus-set-volume (pct)
+ (emus--with-library
+ (setq emus-current-volume pct)
+ (emus-send-cmd "v" (number-to-string pct))))
+
+(defun emus-volume-increase-by (delta)
+ (emus-set-volume (max 0 (min 100 (+ emus-current-volume delta)))))
+
+(defun emus-volume-up ()
+ (interactive)
+ (emus-volume-increase-by 10))
+
+(defun emus-volume-down ()
+ (interactive)
+ (emus-volume-increase-by -10))
+
+(defun emus-play-nearby (offset)
+ (let ((idx (seq-position emus-records emus-current-record)))
+ (if idx
+ (let ((next-record (elt emus-records (+ idx offset))))
+ (if next-record
+ (if (eq emus-state 'playing)
+ (emus-play-record next-record)
+ (emus-select-record next-record))
+ (error "Track does not exist")))
+ (error "No track is currently selected"))))
+
+(defun emus-play-next ()
+ (interactive)
+ (emus-play-nearby 1))
+
+(defun emus-play-prev ()
+ (interactive)
+ (emus-play-nearby -1))
+
+(defun emus-display-status ()
+ (interactive)
+ (emus--with-library
+ (message
+ (concat "Emus: Volume %d%%"
+ (pcase emus-state
+ ('stopped " [Stopped]")
+ ('paused " [Paused]")
+ ('playing " [Playing]")
+ (_ ""))
+ (if emus-current-record
+ (format " - %.30s (%.20s)"
+ (emus-record-title emus-current-record)
+ (emus-record-artist emus-current-record))
+ ""))
+ emus-current-volume)))
+
+
+;;; Browser
+;;
+
+(defun emus--insert-record (record &optional prev-record first)
+ (let* ((artist (emus-record-artist record))
+ (album (emus-record-album record))
+ (title (emus-record-title record))
+ (help-str (format "mouse-1, RET: Play '%.30s' (%.20s)" title artist)))
+ (when (or prev-record first)
+ (unless (equal (emus-record-artist prev-record) artist)
+ (insert-text-button
+ (propertize artist 'face 'emus-artist)
+ 'action #'emus--click-record
+ 'follow-link t
+ 'help-echo help-str
+ 'emus-record record)
+ (insert (propertize "\n" 'face 'emus-artist)))
+ (unless (equal (emus-record-album prev-record) album)
+ (insert-text-button
+ (propertize (concat " " album) 'face 'emus-album)
+ 'action #'emus--click-record
+ 'follow-link t
+ 'help-echo help-str
+ 'emus-record record)
+ (insert (propertize "\n" 'face 'emus-album))))
+ (emus-set-record-browser-pos record (point))
+ (let ((is-current (equal record emus-current-record)))
+ (insert-text-button
+ (concat
+ (if is-current
+ (propertize
+ (pcase emus-state
+ ('playing "->")
+ ('paused "-)")
+ ('stopped "-]"))
+ 'face 'emus-cursor)
+ (propertize " " 'face 'default))
+ (propertize (format " %s" title)
+ 'face (if is-current
+ 'emus-track-current
+ 'emus-track)))
+ 'action #'emus--click-record
+ 'follow-link t
+ 'help-echo help-str
+ 'emus-record record)
+ (insert (propertize "\n"
+ 'face (if is-current
+ 'emus-track-current
+ 'emus-track))))))
+
+(defun emus--update-record (record)
+ (let ((record-pos (emus-record-browser-pos record)))
+ (when (and (get-buffer "*emus*")
+ (emus-record-browser-pos record))
+ (with-current-buffer "*emus*"
+ (let ((inhibit-read-only t)
+ (old-point (point)))
+ (goto-char record-pos)
+ (search-forward "\n")
+ (delete-region record-pos (point))
+ (goto-char record-pos)
+ (emus--insert-record record)
+ (goto-char old-point))))))
+
+(defun emus--render-records ()
+ (with-current-buffer "*emus*"
+ (let ((inhibit-read-only t)
+ (old-pos (point)))
+ (erase-buffer)
+ (goto-char (point-min))
+ (let ((prev-record nil))
+ (dolist (record emus-records)
+ (emus--insert-record record prev-record (not prev-record))
+ (setq prev-record record)))
+ (goto-char old-pos))))
+
+(defun emus--click-record (button)
+ (emus-play-record (button-get button 'emus-record))
+ (emus-display-status))
+
+(defun emus-centre-current ()
+ (interactive)
+ (when (get-buffer "*emus*")
+ (switch-to-buffer "*emus*")
+ (when emus-current-record
+ (goto-char (emus-record-browser-pos emus-current-record))
+ (recenter))))
+
+(defun emus-browse ()
+ "Switch to *emus* audio library browser."
+ (interactive)
+ (emus--with-library
+ (switch-to-buffer "*emus*")
+ (emus-browser-mode)
+ (emus--render-records)
+ (emus-centre-current)))
+
+(defun emus-refresh ()
+ (interactive)
+ (emus-stop)
+ (setq emus-records nil)
+ (emus-browse))
+
+(defun emus-playpause-status () (interactive) (emus-playpause) (emus-display-status))
+(defun emus-stop-status () (interactive) (emus-stop) (emus-display-status))
+(defun emus-volume-up-status () (interactive) (emus-volume-up) (emus-display-status))
+(defun emus-volume-down-status () (interactive) (emus-volume-down) (emus-display-status))
+(defun emus-refresh-status () (interactive) (emus-refresh) (emus-display-status))
+(defun emus-play-next-status () (interactive) (emus-play-next) (emus-display-status))
+(defun emus-play-prev-status () (interactive) (emus-play-prev) (emus-display-status))
+(defun emus-centre-current-status () (interactive) (emus-centre-current) (emus-display-status))
+
+(defvar emus-browser-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map (kbd "SPC") 'emus-playpause-status)
+ (define-key map (kbd "o") 'emus-stop-status)
+ (define-key map (kbd "+") 'emus-volume-up-status)
+ (define-key map (kbd "=") 'emus-volume-up-status)
+ (define-key map (kbd "-") 'emus-volume-down-status)
+ (define-key map (kbd "R") 'emus-refresh-status)
+ (define-key map (kbd "n") 'emus-play-next-status)
+ (define-key map (kbd "p") 'emus-play-prev-status)
+ (define-key map (kbd "c") 'emus-centre-current-status)
+ (when (fboundp 'evil-define-key*)
+ (evil-define-key* 'motion map
+ (kbd "SPC") 'emus-playpause-status
+ (kbd "o") 'emus-stop-status
+ (kbd "+") 'emus-volume-up-status
+ (kbd "=") 'emus-volume-up-status
+ (kbd "-") 'emus-volume-down-status
+ (kbd "R") 'emus-refresh-status
+ (kbd "n") 'emus-play-next-status
+ (kbd "p") 'emus-play-prev-status
+ (kbd "c") 'emus-centre-current-status))
+ map)
+ "Keymap for emus.")
+
+(define-derived-mode emus-browser-mode special-mode "emus-browser"
+ "Major mode for EMUS music player.")
+
+(when (fboundp 'evil-set-initial-state)
+ (evil-set-initial-state 'emus-browser-mode 'motion))
+
+;;; emus.el ends here