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;;; emms-metaplaylist-mode.el --- A major mode for lists of Emms
;;; playlists
;;; Copyright 2005, by Yoni Rabkin under the GNU General Public
;;; License.
;;; Commentary:
;;
;; `emms-metaplaylist-mode' creates an interactive list of all the
;; Emms playlist buffers. The currently active buffer is
;; highlighted. You can choose a buffer from the list with RET and get
;; taken there.
;;; Code:
(require 'emms-playlist-mode)
;;; --------------------------------------------------------
;;; Variables, customisation and faces
;;; --------------------------------------------------------
(defgroup emms-metaplaylist-mode nil
"*The Emacs Multimedia System meta-playlist mode."
:prefix "emms-metaplaylist-mode-"
:group 'multimedia)
(defcustom emms-metaplaylist-mode-buffer-name "*Emms Playlists*"
"*Name of the buffer in which Emms playlists will be listed."
:type 'string
:group 'emms-metaplaylist-mode)
(defcustom emms-metaplaylist-mode-hooks nil
"*List of hooks to run on entry to emms-metaplaylist-mode."
:type 'list
:group 'emms-metaplaylist-mode)
(defface emms-metaplaylist-mode-face
'((((class color) (background dark))
:foreground "AntiqueWhite3")
(((type tty) (class mono))
:inverse-video t)
(t :background "WhiteSmoke"))
"Face for the buffer names in the playlists buffer."
:group 'emms-metaplaylist-mode)
(defface emms-metaplaylist-mode-current-face
'((((class color) (background dark))
:foreground "red2")
(((type tty) (class mono))
:inverse-video t)
(t :background "red3"))
"Face for the current buffer name in the playlists buffer."
:group 'emms-metaplaylist-mode)
;;; --------------------------------------------------------
;;; Keymap
;;; --------------------------------------------------------
(defconst emms-metaplaylist-mode-map
(let ((emms-metaplaylist-mode-map (make-sparse-keymap)))
(set-keymap-parent emms-metaplaylist-mode-map text-mode-map)
(define-key emms-metaplaylist-mode-map (kbd "n") 'next-line)
(define-key emms-metaplaylist-mode-map (kbd "p") 'previous-line)
(define-key emms-metaplaylist-mode-map (kbd "RET") 'emms-metaplaylist-mode-goto-current)
(define-key emms-metaplaylist-mode-map (kbd "q") 'kill-buffer)
(define-key emms-metaplaylist-mode-map (kbd "?") 'describe-mode)
emms-metaplaylist-mode-map)
"Keymap for `emms-metaplaylist-mode'.")
;;; --------------------------------------------------------
;;; Metaplaylist
;;; --------------------------------------------------------
(defun emms-metaplaylist-mode-goto-current ()
"Switch to the buffer at point."
(interactive)
(switch-to-buffer
(buffer-substring (point-at-bol)
(point-at-eol))))
(defun get-emms-playlist-buffers ()
"Return a list of EMMS playlist buffers."
(let ((lis nil))
(mapc (lambda (buf)
(with-current-buffer buf
(when emms-playlist-buffer-p
(setq lis (cons buf lis)))))
(buffer-list))
lis))
;; Since there will never be a significantly large amount of playlist
;; buffers co-existing at once, we allow ourselves not to keep
;; state. We regenerate the playlists buffer anew on demand.
(defun emms-metaplaylist-mode-create ()
"Create or recreate the meta-playlist buffer."
(let ((name emms-metaplaylist-mode-buffer-name)
(playlists (get-emms-playlist-buffers)))
(if playlists
(progn
(ignore-errors (kill-buffer name))
(get-buffer-create name)
(with-current-buffer name
(emms-metaplaylist-mode)
(save-excursion
(mapc (lambda (buf)
(let ((inhibit-read-only t))
(insert (buffer-name buf))
(emms-playlist-mode-overlay-track
(point-at-bol)
(point-at-eol)
(if (eq buf emms-playlist-buffer)
'emms-metaplaylist-mode-face
'emms-metaplaylist-mode-current-face
1)
(newline))))
playlists))
(current-buffer))) ; return the buffer as lisp obj
(error "No Emms playlist buffers"))))
;;; --------------------------------------------------------
;;; Mode entry
;;; --------------------------------------------------------
(defun emms-metaplaylist-mode-go ()
"Single entry point to the metaplaylist interface."
(interactive)
(emms-metaplaylist-mode-create)
(switch-to-buffer emms-metaplaylist-mode-buffer-name))
(defun emms-metaplaylist-mode ()
"A major mode for Emms playlists."
(interactive)
(kill-all-local-variables)
(use-local-map emms-metaplaylist-mode-map)
(setq major-mode 'emms-metaplaylist-mode
mode-name "Emms-MetaPlaylist")
(setq buffer-read-only t)
(run-hooks 'emms-metaplaylist-mode-hooks))
(provide 'emms-metaplaylist-mode)
;;; emms-metaplaylist-mode.el ends here
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