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1 files changed, 52 insertions, 0 deletions

diff --git a/src/platform_win/window_manager.hpp b/src/platform_win/window_manager.hpp
new file mode 100644
index 00000000..6e36ead1
--- /dev/null
+++ b/src/platform_win/window_manager.hpp
@@ -0,0 +1,52 @@
+#pragma once
+#include "cru/platform/win/win_pre_config.hpp"
+
+#include "cru/common/base.hpp"
+
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace cru::platform::win {
+class WinApplication;
+class WinNativeWindow;
+class WindowClass;
+
+class WindowManager : public Object {
+ public:
+  WindowManager(WinApplication* application);
+  WindowManager(const WindowManager& other) = delete;
+  WindowManager(WindowManager&& other) = delete;
+  WindowManager& operator=(const WindowManager& other) = delete;
+  WindowManager& operator=(WindowManager&& other) = delete;
+  ~WindowManager() override = default;
+
+  // Get the general window class for creating ordinary window.
+  std::shared_ptr<WindowClass> GetGeneralWindowClass() const {
+    return general_window_class_;
+  }
+
+  // Register a window newly created.
+  // This function adds the hwnd to hwnd-window map.
+  // It should be called immediately after a window was created.
+  void RegisterWindow(HWND hwnd, WinNativeWindow* window);
+
+  // Unregister a window that is going to be destroyed.
+  // This function removes the hwnd from the hwnd-window map.
+  // It should be called immediately before a window is going to be destroyed,
+  void UnregisterWindow(HWND hwnd);
+
+  // Return a pointer to the Window object related to the HWND or nullptr if the
+  // hwnd is not in the map.
+  WinNativeWindow* FromHandle(HWND hwnd);
+
+  std::vector<WinNativeWindow*> GetAllWindows() const;
+
+ private:
+  WinApplication* application_;
+
+  std::shared_ptr<WindowClass> general_window_class_;
+  std::map<HWND, WinNativeWindow*> window_map_;
+};
+
+}  // namespace cru::platform::win