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#pragma once
#include "Base.h"
#include "cru/common/Event.h"
#include <memory>
#include <vector>
namespace cru::platform::gui {
struct CompositionClause {
int start;
int end;
bool target;
};
using CompositionClauses = std::vector<CompositionClause>;
struct CompositionText {
String text;
CompositionClauses clauses;
TextRange selection;
};
struct IInputMethodContext : virtual IPlatformResource {
// Return true if you should draw composition text manually. Return false if
// system will take care of that for you.
virtual bool ShouldManuallyDrawCompositionText() = 0;
virtual void EnableIME() = 0;
virtual void DisableIME() = 0;
virtual void CompleteComposition() = 0;
virtual void CancelComposition() = 0;
virtual CompositionText GetCompositionText() = 0;
// Set the candidate window lefttop. Relative to window lefttop. Use this
// method to prepare typing.
virtual void SetCandidateWindowPosition(const Point& point) = 0;
// Triggered when user starts composition.
virtual IEvent<std::nullptr_t>* CompositionStartEvent() = 0;
// Triggered when user stops composition.
virtual IEvent<std::nullptr_t>* CompositionEndEvent() = 0;
// Triggered every time composition text changes.
virtual IEvent<std::nullptr_t>* CompositionEvent() = 0;
virtual IEvent<StringView>* TextEvent() = 0;
};
} // namespace cru::platform::gui
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