Make AskForScan() per-device rather than per device lister and fix cddadevice to use the url rather than the unique id.

src/devices/cddadevice.cpp

@@ -53,7 +53,7 @@ void CddaDevice::Init() {
     return;
   }
 
-  GST_CDDA_BASE_SRC(cdda_)->device = g_strdup (unique_id_.toLocal8Bit().constData());
+  GST_CDDA_BASE_SRC(cdda_)->device = g_strdup (url_.path().toLocal8Bit().constData());
 
   // Change the element's state to ready and paused, to be able to query it
   if (gst_element_set_state(cdda_, GST_STATE_READY) == GST_STATE_CHANGE_FAILURE ||
@@ -88,7 +88,7 @@ void CddaDevice::Init() {
     song.set_id(track_number);
     song.set_valid(true);
     song.set_filetype(Song::Type_Cdda);
-    song.set_url(QUrl(QString("cdda://%1/%2").arg(unique_id()).arg(track_number)));
+    song.set_url(QUrl(QString("cdda://%1/%2").arg(url_.path()).arg(track_number)));
     song.set_title(QString("Track %1").arg(track_number));
     song.set_track(track_number);
     songs << song;

src/devices/cddalister.h

@@ -37,7 +37,7 @@ public:
   quint64 DeviceCapacity(const QString& id);
   quint64 DeviceFreeSpace(const QString& id);
   QVariantMap DeviceHardwareInfo(const QString& id);
-  bool AskForScan() { return false; }
+  bool AskForScan(const QString&) const { return false; }
   QString MakeFriendlyName(const QString&);
   QList<QUrl> MakeDeviceUrls(const QString&);
   void UnmountDevice(const QString&);

src/devices/devicelister.h

@@ -53,7 +53,7 @@ public:
 
   // When connecting to a device for the first time, do we want an user's
   // confirmation for scanning it? (by default yes)
-  virtual bool AskForScan() { return true; }
+  virtual bool AskForScan(const QString&) const { return true; }
 
   virtual QString MakeFriendlyName(const QString& id) = 0;
   virtual QList<QUrl> MakeDeviceUrls(const QString& id) = 0;

src/devices/devicemanager.cpp

@@ -319,7 +319,7 @@ QVariant DeviceManager::data(const QModelIndex& index, int role) const {
         if (info.database_id_ == -1 &&
             !info.BestBackend()->lister_->DeviceNeedsMount(info.BestBackend()->unique_id_)) {
 
-          if (info.BestBackend()->lister_->AskForScan()) {
+          if (info.BestBackend()->lister_->AskForScan(info.BestBackend()->unique_id_)) {
             boost::scoped_ptr<QMessageBox> dialog(new QMessageBox(
                 QMessageBox::Information, tr("Connect device"),
                 tr("This is the first time you have connected this device.  Clementine will now scan the device to find music files - this may take some time."),

src/devices/deviceview.cpp

@@ -308,8 +308,9 @@ void DeviceView::DeviceDisconnected(int row) {
 
 void DeviceView::Forget() {
   QModelIndex device_idx = MapToDevice(menu_index_);
+  QString unique_id = manager_->data(device_idx, DeviceManager::Role_UniqueId).toString();
   if (manager_->GetLister(device_idx.row()) &&
-      manager_->GetLister(device_idx.row())->AskForScan()) {
+      manager_->GetLister(device_idx.row())->AskForScan(unique_id)) {
     boost::scoped_ptr<QMessageBox> dialog(new QMessageBox(
         QMessageBox::Question, tr("Forget device"),
         tr("Forgetting a device will remove it from this list and Clementine will have to rescan all the songs again next time you connect it."),

src/devices/macdevicelister.h

@@ -24,6 +24,7 @@ class MacDeviceLister : public DeviceLister {
   virtual quint64 DeviceCapacity(const QString& id);
   virtual quint64 DeviceFreeSpace(const QString& id);
   virtual QVariantMap DeviceHardwareInfo(const QString& id);
+  virtual bool AskForScan(const QString& serial) const;
   virtual QString MakeFriendlyName(const QString& id);
   virtual QList<QUrl> MakeDeviceUrls(const QString& id);
 

src/devices/macdevicelister.mm

@@ -823,6 +823,10 @@ quint64 MacDeviceLister::DeviceFreeSpace(const QString& serial){
 
 QVariantMap MacDeviceLister::DeviceHardwareInfo(const QString& serial){return QVariantMap();}
 
+bool MacDeviceLister::AskForScan(const QString& serial) const {
+  return !IsCDDevice(serial);
+}
+
 void MacDeviceLister::UnmountDevice(const QString& serial) {
   if (IsMTPSerial(serial)) return;