From b79c9a61454fbf79a641cf353846ec7690af52f5 Mon Sep 17 00:00:00 2001
From: Hardeep Sidhu <dyp@pobox.com>
Date: Wed, 19 Apr 2006 02:22:23 +0000
Subject: [PATCH] Allow insert shuffled option for directories when playlist is
 empty.  Based on patch #3011 by Jonathan Gordon.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9728 a1c6a512-1295-4272-9138-f99709370657
---
 apps/onplay.c   |  8 ++++++++
 apps/playlist.c | 12 ++++++++----
 apps/playlist.h |  1 +
 3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/apps/onplay.c b/apps/onplay.c
index 5dcbe6e13e..6ff99d7dd1 100644
--- a/apps/onplay.c
+++ b/apps/onplay.c
@@ -314,6 +314,14 @@ static bool playlist_options(void)
             args[i].position = PLAYLIST_INSERT;
             args[i].queue = false;
             i++;
+
+            if (selected_file_attr & ATTR_DIRECTORY)
+            {
+                items[i].desc = ID2P(LANG_INSERT_SHUFFLED);
+                args[i].position = PLAYLIST_INSERT_SHUFFLED;
+                args[i].queue = false;
+                i++;
+            }
         }
     }
 
diff --git a/apps/playlist.c b/apps/playlist.c
index f11cb04370..86e963a51c 100644
--- a/apps/playlist.c
+++ b/apps/playlist.c
@@ -223,6 +223,7 @@ static void empty_playlist(struct playlist_info* playlist, bool resume)
     playlist->shuffle_modified = false;
     playlist->deleted = false;
     playlist->num_inserted_tracks = 0;
+    playlist->started = false;
 
     playlist->num_cached = 0;
     playlist->pending_control_sync = false;
@@ -602,7 +603,7 @@ static int add_track_to_playlist(struct playlist_info* playlist,
             break;
         case PLAYLIST_INSERT_SHUFFLED:
         {
-            if (playlist->amount > 0)
+            if (playlist->started)
             {
                 int offset;
                 int n = playlist->amount -
@@ -620,7 +621,7 @@ static int add_track_to_playlist(struct playlist_info* playlist,
                 insert_position = position;
             }
             else
-                position = insert_position = 0;
+                position = insert_position = (rand() % (playlist->amount+1));
             break;
         }
     }
@@ -639,11 +640,12 @@ static int add_track_to_playlist(struct playlist_info* playlist,
     }
     
     /* update stored indices if needed */
-    if (playlist->amount > 0 && insert_position <= playlist->index)
+    if (playlist->amount > 0 && insert_position <= playlist->index &&
+        playlist->started)
         playlist->index++;
 
     if (playlist->amount > 0 && insert_position <= playlist->first_index &&
-        position != PLAYLIST_PREPEND)
+        position != PLAYLIST_PREPEND && playlist->started)
     {
         playlist->first_index++;
 
@@ -2313,6 +2315,8 @@ int playlist_start(int start_index, int offset)
 #endif
     audio_play(offset);
 
+    playlist->started = true;
+
     return 0;
 }
 
diff --git a/apps/playlist.h b/apps/playlist.h
index 3aa5406a51..1a5bb3d33c 100644
--- a/apps/playlist.h
+++ b/apps/playlist.h
@@ -90,6 +90,7 @@ struct playlist_info
                               inserted tracks?                      */
     bool deleted;        /* have any tracks been deleted?           */
     int num_inserted_tracks; /* number of tracks inserted           */
+    bool started;       /* has playlist been started?               */
 
     /* cache of playlist control commands waiting to be flushed to
        to disk                                                      */