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;;; emms-playlist-limit.el --- limit playlist by various info
;; Copyright (C) 2007 William Xu
;; Author: William Xu <william.xwl@gmail.com>
;; Keywords: emms, limit
;; This program 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.
;;
;; This program 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, write to the Free Software
;; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
;; 02110-1301 USA
;;; Code:
(require 'emms-playlist-mode)
;;; User Interfacs
;;;###autoload
(defun emms-playlist-limit (arg)
"Turn on emms limit if ARG is positive, off otherwise."
(interactive "p")
(if (and arg (> arg 0))
(add-hook 'emms-playlist-source-inserted-hook
'emms-playlist-limit-update-tracks)
(remove-hook 'emms-playlist-source-inserted-hook
'emms-playlist-limit-update-tracks)))
(define-key emms-playlist-mode-map (kbd "/ n") 'emms-playlist-limit-to-name)
(define-key emms-playlist-mode-map (kbd "/ a") 'emms-playlist-limit-to-info-artist)
(define-key emms-playlist-mode-map (kbd "/ t") 'emms-playlist-limit-to-info-title)
(define-key emms-playlist-mode-map (kbd "/ b") 'emms-playlist-limit-to-info-album)
(define-key emms-playlist-mode-map (kbd "/ y") 'emms-playlist-limit-to-info-year)
(define-key emms-playlist-mode-map (kbd "/ g") 'emms-playlist-limit-to-info-genre)
(define-key emms-playlist-mode-map (kbd "/ /") 'emms-playlist-limit-to-all)
(defun emms-playlist-limit-to-info-artist (regexp)
"Limit to playlists that have artist that matches REGEXP."
(interactive
(list
(read-string
(format "Limit to artist (regexp = %s): "
(emms-track-get (emms-playlist-track-at) 'info-artist)))))
(when (string= regexp "")
(setq regexp (emms-track-get (emms-playlist-track-at) 'info-artist)))
(emms-playlist-limit-do 'info-artist regexp))
(defun emms-playlist-limit-to-info-album (regexp)
"Limit to playlists that have album that matches REGEXP."
(interactive
(list
(read-string
(format "Limit to album (regexp = %s): "
(emms-track-get (emms-playlist-track-at) 'info-album)))))
(when (string= regexp "")
(setq regexp (emms-track-get (emms-playlist-track-at) 'info-album)))
(emms-playlist-limit-do 'info-album regexp))
(defun emms-playlist-limit-to-info-title (regexp)
"Limit to playlists that have title that matches REGEXP."
(interactive
(list
(read-string
(format "Limit to title (regexp = %s): "
(emms-track-get (emms-playlist-track-at) 'info-title)))))
(when (string= regexp "")
(setq regexp (emms-track-get (emms-playlist-track-at) 'info-title)))
(emms-playlist-limit-do 'info-title regexp))
(defun emms-playlist-limit-to-info-year (regexp)
"Limit to playlists that have year that matches REGEXP."
(interactive
(list
(read-string
(format "Limit to year (regexp = %s): "
(emms-track-get (emms-playlist-track-at) 'info-year)))))
(when (string= regexp "")
(setq regexp (emms-track-get (emms-playlist-track-at) 'info-year)))
(emms-playlist-limit-do 'info-year regexp))
(defun emms-playlist-limit-to-info-genre (regexp)
"Limit to playlists that have genre that matches REGEXP."
(interactive
(list
(read-string
(format "Limit to genre (regexp = %s): "
(emms-track-get (emms-playlist-track-at) 'info-genre)))))
(when (string= regexp "")
(setq regexp (emms-track-get (emms-playlist-track-at) 'info-genre)))
(emms-playlist-limit-do 'info-genre regexp))
(defun emms-playlist-limit-to-name (regexp)
"Limit to playlists that have name that matches REGEXP."
(interactive
(list
(read-string
(format "Limit to genre (regexp = %s): "
(emms-track-get (emms-playlist-track-at) 'name)))))
(when (string= regexp "")
(setq regexp (emms-track-get (emms-playlist-track-at) 'name)))
(emms-playlist-limit-do 'name regexp))
(defun emms-playlist-limit-to-all ()
"Show all tracks again."
(interactive)
(emms-playlist-limit-do nil nil))
;;; Low Level Functions
(defvar emms-playlist-limit-tracks nil
"All tracks in playlist buffer.")
(defun emms-playlist-limit-update-tracks ()
"Update `emms-playlist-limit-tracks'."
(setq emms-playlist-limit-tracks
(append emms-playlist-limit-tracks
(emms-playlist-tracks-in-region
(point-min) (point-max)))))
(defun emms-playlist-limit-do (name value)
"Limit by NAME with VALUE.
e.g.,
(emms-playlist-limit-do 'info-artist \"Jane Zhang\")
When NAME is nil, show all tracks again.
See `emms-info-mp3find-arguments' for possible options."
(with-current-emms-playlist
(save-excursion
(emms-playlist-ensure-playlist-buffer)
(let ((curr (emms-playlist-current-selected-track))
(tracks
(emms-playlist-tracks-in-region (point-min) (point-max))))
(erase-buffer)
(run-hooks 'emms-playlist-cleared-hook)
(if name
(mapc (lambda (track)
(let ((track-value (emms-track-get track name)))
(when (and track-value (string-match value track-value))
(emms-playlist-insert-track track))))
tracks)
(mapc (lambda (track)
(emms-playlist-insert-track track))
emms-playlist-limit-tracks))
(let ((pos (text-property-any (point-min) (point-max)
'emms-track curr)))
(if pos
(emms-playlist-select pos)
(emms-playlist-first)))))))
(provide 'emms-playlist-limit)
;;; emms-playlist-limit.el ends here
|
