Repo created

libs/drape_frontend/metaline_manager.cpp

@@ -0,0 +1,76 @@
+#include "drape_frontend/metaline_manager.hpp"
+
+#include "drape_frontend/map_data_provider.hpp"
+#include "drape_frontend/message_subclasses.hpp"
+#include "drape_frontend/threads_commutator.hpp"
+
+#include "base/logging.hpp"
+
+#include <functional>
+
+namespace df
+{
+MetalineManager::MetalineManager(ref_ptr<ThreadsCommutator> commutator, MapDataProvider & model)
+  : m_model(model)
+  , m_commutator(commutator)
+{}
+
+MetalineManager::~MetalineManager()
+{
+  Stop();
+}
+
+void MetalineManager::Stop()
+{
+  m_activeTasks.FinishAll();
+}
+
+void MetalineManager::Update(std::set<MwmSet::MwmId> const & mwms)
+{
+  std::lock_guard<std::mutex> lock(m_mwmsMutex);
+  for (auto const & mwm : mwms)
+  {
+    ASSERT(mwm.IsAlive(), ());
+    if (mwm.GetInfo()->GetType() != MwmInfo::MwmTypeT::COUNTRY || !m_mwms.insert(mwm).second)
+      continue;
+
+    auto readingTask = std::make_shared<ReadMetalineTask>(m_model, mwm);
+    auto routine = dp::DrapeRoutine::Run([this, readingTask]()
+    {
+      readingTask->Run();
+      OnTaskFinished(readingTask);
+    });
+
+    if (routine)
+      m_activeTasks.Add(std::move(readingTask), std::move(routine));
+  }
+}
+
+m2::SharedSpline MetalineManager::GetMetaline(FeatureID const & fid) const
+{
+  std::lock_guard<std::mutex> lock(m_metalineCacheMutex);
+  auto const metalineIt = m_metalineCache.find(fid);
+  if (metalineIt == m_metalineCache.end())
+    return m2::SharedSpline();
+  return metalineIt->second;
+}
+
+void MetalineManager::OnTaskFinished(std::shared_ptr<ReadMetalineTask> const & task)
+{
+  if (task->IsCancelled())
+    return;
+
+  std::lock_guard<std::mutex> lock(m_metalineCacheMutex);
+
+  if (task->UpdateCache(m_metalineCache))
+  {
+    // Notify frontend renderer.
+    LOG(LDEBUG, ("Metalines prepared:", task->GetMwmId()));
+    m_commutator->PostMessage(ThreadsCommutator::RenderThread, make_unique_dp<UpdateMetalinesMessage>(),
+                              MessagePriority::Normal);
+  }
+
+  // Remove task from active ones.
+  m_activeTasks.Remove(task);
+}
+}  // namespace df