Added support for m3u playlists (and hence internet radio)

diff --git a/emus.el b/emus.el
index cfa674a..08df9f5 100644 (file)
--- a/emus.el
+++ b/emus.el
@@ -57,12 +57,12 @@
   :type '(string))
 
 (defface emus-artist
-  '(((background dark) :inherit font-lock-string-face :inverse-video t :extend t)
+  '((((background dark)) :inherit font-lock-string-face :background "#222" :extend t)
     (t :inherit font-lock-string-face :background "#ddd" :extend t))
   "Face used for artist names in browser.")
 
 (defface emus-album
-  '(((background dark) :inherit font-lock-constant-face :inverse-video t :extend t)
+  '((((background dark)) :inherit font-lock-constant-face :background "#111" :extend t)
     (t :inherit font-lock-constant-face :background "#eee" :extend t))
   "Face used for album names in browser.")
 
@@ -71,7 +71,7 @@
   "Face used for track titles in browser.")
 
 (defface emus-track-current
-  '((t :inherit font-lock-keyword-face :inverse-video t))
+  '((t :inherit font-lock-keyword-face :inverse-video t :extend t))
   "Face used for track titles in browser.")
 
 (defface emus-cursor
@@ -143,17 +143,22 @@ be used by `emus--load-library'."
 (defun emus-get-audio-files ()
   "Get all mp3 files in main emus directory."
   (mapcar
-   (lambda (f)
-     (expand-file-name f))
+   #'expand-file-name
    (directory-files-recursively emus-directory ".*\\.mp3")))
 
+(defun emus-get-playlist-files ()
+  "Get all m3u files in the main emus music directory."
+  (mapcar
+   #'expand-file-name
+   (directory-files-recursively emus-directory ".*\\.m3u")))
+
 (defun emus-make-track (artist album title filename &optional pos)
   "Create an object representing an emus track.
 ARTIST, ALBUM and TITLE are used to describe the track, FILENAME
 refers to the mp3 file containing the track.  If non-nil, POS
 specifies the position of the record representing this track in the
 emus browser buffer."
-  (vector artist album title filename pos))
+  (list artist album title filename pos))
 
 (defun emus-track-artist (track)
   "The artist corresponding to TRACK."
@@ -177,7 +182,7 @@ emus browser buffer."
 
 (defun emus-set-track-browser-pos (track pos)
   "Set the location of the browser buffer record corresponding to TRACK to POS."
-  (aset track 4 pos))
+  (setf (seq-elt track 4) pos))
 
 (defun emus--load-library (then)
   "Initialize the emus track library.
@@ -186,10 +191,10 @@ Once the library is initialized, the function THEN is called."
     (setq emus--proc-in-use t)
     (emus--suspend-cp)
     (setq emus-state 'stopped)
+    (setq emus-tracks (emus--make-tracks-from-playlist-files (emus-get-playlist-files)))
     (let ((proc (emus-get-process))
           (tagstr "")
           (filenames (emus-get-audio-files)))
-      (setq emus-tracks nil)
       (set-process-filter proc (lambda (proc string)
                                  (setq tagstr (concat tagstr string))
                                  (when (string-suffix-p "@P 1\n" string)
@@ -210,6 +215,9 @@ Once the library is initialized, the function THEN is called."
                                      (setq emus--proc-in-use nil)))))
       (emus--send-cmd-raw "lp" (car filenames)))))
 
+(defun emus--dump-tracks ()
+    emus-tracks)
+
 (defun emus--make-track-from-tagstr (filename tagstr)
   "Parse TAGSTR to populate the fields of a track corresponding to FILENAME."
   (let ((artist "")
@@ -223,21 +231,52 @@ Once the library is initialized, the function THEN is called."
          (found-artist (setq artist found-artist))
          (found-album (setq album found-album))
          (found-title (setq title found-title)))))
-    (emus-make-track artist album title filename nil)))
+    (emus-make-track artist album title filename)))
+
+(defun emus--make-tracks-from-playlist-files (filenames)
+  (let ((tracks nil))
+    (dolist (filename filenames)
+      (let ((artist "Playlists")
+            (album (file-name-base filename))
+            (title nil)
+            (lines (split-string (with-temp-buffer
+                                   (insert-file-contents filename)
+                                   (buffer-string))
+                                 "\n")))
+        (dolist (line lines)
+          (pcase (string-trim line)
+            ((rx (: string-start
+                    (* space)
+                    "#extinf:"
+                    (* (not ",")) ","
+                    (let display-title (* any))
+                    string-end))
+             (setq title display-title))
+            ((rx (: string-start (* space) "#"))) ;skip other comments
+            ((rx (let filename (+ any)))
+             (setq tracks (cons (emus-make-track artist album (or title filename) filename)
+                                tracks))
+             (setq title nil))))))
+    tracks))
 
 (defun emus--sort-tracks ()
   "Sort the library tracks according to artist and album.
 Leaves the track titles unsorted, so they will appear in the order specified
 by the filesystem."
-  (sort emus-tracks
-        (lambda (r1 r2)
-          (let ((artist1 (emus-track-artist r1))
-                (artist2 (emus-track-artist r2)))
-            (if (string= artist1 artist2)
-                (let ((album1 (emus-track-album r1))
-                      (album2 (emus-track-album r2)))
-                  (string< album1 album2))
-              (string< artist1 artist2))))))
+  (setq emus-tracks
+        (sort emus-tracks
+              (lambda (r1 r2)
+                (let ((artist1 (emus-track-artist r1))
+                      (artist2 (emus-track-artist r2)))
+                  (if (string= artist1 artist2)
+                      (let ((album1 (emus-track-album r1))
+                            (album2 (emus-track-album r2)))
+                        (string< album1 album2))
+                    (if (equal artist1 "Playlists")
+                        t
+                      (if (equal artist2 "Playlists")
+                          nil
+                        (string< artist1 artist2)))))))))
 
 (defmacro emus--with-library (&rest body)
   "Evaluate BODY with the library initialized."
@@ -415,12 +454,13 @@ If PREV is non-nil, plays the last track of the previous album."
               ('paused " [Paused]")
               ('playing " [Playing]")
               (_ ""))
-            (if emus-current-track
-                (format " - %.30s (%.20s)"
-                        (emus-track-title emus-current-track)
-                        (emus-track-artist emus-current-track))
-              ""))
-    emus-current-volume)))
+            " %s")
+    emus-current-volume
+    (if emus-current-track
+        (format "- %.30s (%.20s)"
+                (emus-track-title emus-current-track)
+                (emus-track-artist emus-current-track))
+      ""))))
 
 
 ;;; Browser
@@ -437,6 +477,7 @@ and thus requires both artist and album headers."
   (let* ((artist (emus-track-artist track))
          (album (emus-track-album track))
          (title (emus-track-title track))
+         (album-symb (intern (concat artist album)))
          (help-str (format "mouse-1, RET: Play '%.30s' (%.20s)" title artist))
          (field (intern album))) ;Allows easy jumping between albums with cursor.
     (when (or prev-track first)
@@ -482,12 +523,14 @@ and thus requires both artist and album headers."
        'follow-link t
        'help-echo help-str
        'emus-track track
+       'invisible album-symb
        'field field)
       (insert (propertize "\n"
                           'face (if is-current
                                     'emus-track-current
                                   'emus-track)
-                          'field field)))))
+                          'field field
+                          'invisible album-symb)))))
 
 (defun emus--update-track (track)
   "Rerender entry for TRACK in emus browser buffer.
@@ -660,7 +703,8 @@ Used to update browser display when `emus-current-track' and/or `emus-state' cha
   "Keymap for emus browser.")
 
 (define-derived-mode emus-browser-mode special-mode "emus-browser"
-  "Major mode for EMUS music player file browser.")
+  "Major mode for EMUS music player file browser."
+  (setq-local buffer-invisibility-spec nil))
 
 (when (fboundp 'evil-set-initial-state)
   (evil-set-initial-state 'emus-browser-mode 'motion))