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;;; emms-metaplaylist-mode.el --- A major mode for lists of Emms
;;; playlists
;; Copyright (C) 2006, 2007 Free Software Foundation, Inc.
;; Author: Yoni Rabkin <yonirabkin@member.fsf.org>
;; 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 3
;; of the License, 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:
;;
;; `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)
(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"))
(((class color) (background light))
(:foreground "red3"))
(((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"))
(((class color) (background light))
(:background "red3" :foreground "white"))
(((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 ((map (make-sparse-keymap)))
(set-keymap-parent map text-mode-map)
(define-key map (kbd "n") 'next-line)
(define-key map (kbd "p") 'previous-line)
(define-key map (kbd "RET") 'emms-metaplaylist-mode-goto-current)
(define-key map (kbd "q") 'kill-this-buffer)
(define-key map (kbd "?") 'describe-mode)
(define-key map (kbd "SPC") 'emms-metaplaylist-set-active)
(define-key map (kbd "c") 'emms-metaplaylist-new-buffer)
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))))
;; 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 (emms-playlist-buffer-list)))
(if playlists
(progn
(condition-case nil
(kill-buffer name)
(error nil))
(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))
(add-text-properties
(point-at-bol) (point-at-eol)
(list 'face
(if (eq buf emms-playlist-buffer)
'emms-metaplaylist-mode-current-face
'emms-metaplaylist-mode-face)))
(newline)))
playlists))
(current-buffer))) ; return the buffer as lisp obj
(error "No Emms playlist buffers"))))
;;; --------------------------------------------------------
;;; Playlist Management : creation, deletion (?)
;;; --------------------------------------------------------
(defun emms-metaplaylist-new-buffer (buffer-name)
"Creates a new buffer called buffer-name, which will be ready
to host EMMS tracks."
(interactive "sBuffer Name: ")
(if(get-buffer buffer-name)
(error "Buffer must not exist.")
(let ((buf (get-buffer-create buffer-name)))
(with-current-buffer buf
(setq emms-playlist-buffer-p t)))
(message "Buffer created")))
(defun emms-metaplaylist-set-active ()
(interactive)
(emms-playlist-set-playlist-buffer
(get-buffer (buffer-substring (point-at-bol) (point-at-eol))))
(let ((ici (point)))
(emms-metaplaylist-mode-go)
(goto-char ici)))
;;; --------------------------------------------------------
;;; 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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