Make the player actually use the queue order. Fixes issue #24.

src/playlist/playlist.cpp

@@ -348,6 +348,11 @@ int Playlist::next_index() const {
   if (stop_after_.isValid() && current_index() == stop_after_.row())
     return -1;
 
+  // Any queued items take priority
+  if (!queue_->is_empty()) {
+    return queue_->PeekNext();
+  }
+
   int next_virtual_index = NextVirtualIndex(current_virtual_index_);
   if (next_virtual_index >= virtual_items_.count()) {
     // We've gone off the end of the playlist.
@@ -419,6 +424,10 @@ void Playlist::set_current_index(int i) {
     emit CurrentSongChanged(current_item_metadata());
   }
 
+  if (current_item_index_.row() == queue_->PeekNext()) {
+    queue_->TakeNext();
+  }
+
   // Update the virtual index
   if (i == -1)
     current_virtual_index_ = -1;

src/playlist/queue.cpp

@@ -300,5 +300,21 @@ Qt::ItemFlags Queue::flags(const QModelIndex &index) const {
     flags |= Qt::ItemIsDropEnabled;
 
   return flags;
-
+}
+
+int Queue::PeekNext() const {
+  if (source_indexes_.isEmpty())
+    return -1;
+  return source_indexes_.first().row();
+}
+
+int Queue::TakeNext() {
+  if (source_indexes_.isEmpty())
+    return -1;
+
+  beginRemoveRows(QModelIndex(), 0, 0);
+  int ret = source_indexes_.takeFirst().row();
+  endRemoveRows();
+
+  return ret;
 }

src/playlist/queue.h

@@ -38,9 +38,10 @@ public:
   // Query the queue
   bool is_empty() const;
   int PositionOf(const QModelIndex& source_index) const;
+  int PeekNext() const;
 
   // Modify the queue
-  QModelIndex TakeNext();
+  int TakeNext();
   void ToggleTracks(const QModelIndexList& source_indexes);
   void Clear();
   void Move(const QList<int>& proxy_rows, int pos);