Dont allow copy music to optical drives

Fixes #387

src/device/cddalister.h

@@ -52,6 +52,7 @@ class CddaLister : public DeviceLister {
   void UnmountDevice(const QString&);
   void UpdateDeviceFreeSpace(const QString&);
   bool Init();
+  bool CopyMusic() { return false; }
 
  private:
   QStringList devices_list_;

src/device/devicelister.h

@@ -69,6 +69,8 @@ class DeviceLister : public QObject {
   // Do whatever needs to be done to safely remove the device.
   virtual void UnmountDeviceAsync(const QString &id);
 
+  virtual bool CopyMusic() { return true; }
+
  public slots:
   virtual void UpdateDeviceFreeSpace(const QString &id) = 0;
   virtual void ShutDown() {}

src/device/devicemanager.cpp

@@ -385,6 +385,10 @@ QVariant DeviceManager::data(const QModelIndex &idx, int role) const {
       if (!info->device_) return QVariant();
       return info->device_->song_count();
 
+    case Role_CopyMusic:
+      if (info->BestBackend() && info->BestBackend()->lister_) return info->BestBackend()->lister_->CopyMusic();
+      else return false;
+
     default:
       return QVariant();
   }

src/device/devicemanager.h

@@ -73,6 +73,7 @@ class DeviceManager : public SimpleTreeModel<DeviceInfo> {
     Role_TranscodeMode,
     Role_TranscodeFormat,
     Role_SongCount,
+    Role_CopyMusic,
     LastRole,
   };
 

src/device/devicestatefiltermodel.cpp

@@ -40,7 +40,7 @@ DeviceStateFilterModel::DeviceStateFilterModel(QObject *parent, DeviceManager::S
 }
 
 bool DeviceStateFilterModel::filterAcceptsRow(int row, const QModelIndex&) const {
-  return sourceModel()->index(row, 0).data(DeviceManager::Role_State).toInt() != state_;
+  return sourceModel()->index(row, 0).data(DeviceManager::Role_State).toInt() != state_ && sourceModel()->index(row, 0).data(DeviceManager::Role_CopyMusic).toBool();
 }
 
 void DeviceStateFilterModel::ProxyRowCountChanged() {