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1 files changed, 30 insertions, 0 deletions

diff --git a/include/cru/platform/native/input_method.hpp b/include/cru/platform/native/input_method.hpp
new file mode 100644
index 00000000..ecc47fd8
--- /dev/null
+++ b/include/cru/platform/native/input_method.hpp
@@ -0,0 +1,30 @@
+#pragma once
+#include "../resource.hpp"
+#include "base.hpp"
+#include "cru/common/event.hpp"
+
+#include <memory>
+
+namespace cru::platform::native {
+// It is a reference, so there is a ref count, remember to destroy it to release
+// the ref after use.
+struct IInputMethodContextRef : INativeResource {
+  // Reset composition string. Use this method to prepare typing.
+  virtual void Reset() = 0;
+  // Get the composition string.
+  virtual std::string GetCompositionString() = 0;
+  // Set the candidate window lefttop. Use this method to prepare typing.
+  virtual void SetCandidateWindowPosition(const Point& point);
+  // Triggered every time composition text changes, evet args is the new
+  // composition text.
+  virtual IEvent<std::string>* CompositionTextChangeEvent() = 0;
+  // User comfirmed compostition. Use this method to get the final input text.
+  virtual IEvent<std::string>* CharEvent() = 0;
+};
+
+struct IInputMethodManager : INativeResource {
+  // Get a reference of context of a window.
+  virtual std::unique_ptr<IInputMethodContextRef> GetContext(
+      INativeWindow* window) = 0;
+};
+}  // namespace cru::platform::native