New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/drape_frontend/read_metaline_task.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include "indexer/feature_decl.hpp"
+
+#include "geometry/spline.hpp"
+
+#include <atomic>
+#include <map>
+
+namespace df
+{
+class MapDataProvider;
+
+using MetalineCache = std::map<FeatureID, m2::SharedSpline>;
+
+class ReadMetalineTask
+{
+public:
+  ReadMetalineTask(MapDataProvider & model, MwmSet::MwmId const & mwmId);
+
+  void Run();
+  bool UpdateCache(MetalineCache & cache);
+
+  void Cancel() { m_isCancelled = true; }
+  bool IsCancelled() const { return m_isCancelled; }
+  MwmSet::MwmId const & GetMwmId() const { return m_mwmId; }
+
+private:
+  MapDataProvider & m_model;
+  MwmSet::MwmId m_mwmId;
+  MetalineCache m_metalines;
+  std::atomic<bool> m_isCancelled;
+};
+}  // namespace df