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1 files changed, 58 insertions, 0 deletions

diff --git a/include/cru/platform/native/UiApplication.hpp b/include/cru/platform/native/UiApplication.hpp
new file mode 100644
index 00000000..1aa4df57
--- /dev/null
+++ b/include/cru/platform/native/UiApplication.hpp
@@ -0,0 +1,58 @@
+#pragma once
+#include "../Resource.hpp"
+#include "Base.hpp"
+
+#include <chrono>
+#include <functional>
+#include <memory>
+#include <vector>
+
+namespace cru::platform::native {
+// The entry point of a ui application.
+struct IUiApplication : public virtual INativeResource {
+ public:
+  static IUiApplication* GetInstance() { return instance; }
+
+ private:
+  static IUiApplication* instance;
+
+ protected:
+  IUiApplication();
+
+ public:
+  ~IUiApplication() override;
+
+  // Block current thread and run the message loop. Return the exit code when
+  // message loop gets a quit message (possibly posted by method RequestQuit).
+  virtual int Run() = 0;
+
+  // Post a quit message with given quit code.
+  virtual void RequestQuit(int quit_code) = 0;
+
+  virtual void AddOnQuitHandler(std::function<void()> handler) = 0;
+
+  virtual void InvokeLater(std::function<void()> action) = 0;
+  // Timer id should always be positive and never the same. So it's ok to use
+  // negative value to represent no timer.
+  virtual long long SetTimeout(std::chrono::milliseconds milliseconds,
+                               std::function<void()> action) = 0;
+  virtual long long SetInterval(std::chrono::milliseconds milliseconds,
+                                std::function<void()> action) = 0;
+  // Implementation should guarantee calls on timer id already canceled have no
+  // effects and do not crash. Also canceling negative id should always result
+  // in no-op.
+  virtual void CancelTimer(long long id) = 0;
+
+  virtual std::vector<INativeWindow*> GetAllWindow() = 0;
+  virtual std::shared_ptr<INativeWindowResolver> CreateWindow(
+      INativeWindow* parent) = 0;
+
+  virtual cru::platform::graph::IGraphFactory* GetGraphFactory() = 0;
+
+  virtual ICursorManager* GetCursorManager() = 0;
+  virtual IInputMethodManager* GetInputMethodManager() = 0;
+};
+
+// Bootstrap from this.
+std::unique_ptr<IUiApplication> CreateUiApplication();
+}  // namespace cru::platform::native