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#pragma once
#include "Base.hpp"
#include "cru/common/Event.hpp"
#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
// template <>
// struct fmt::formatter<cru::platform::gui::CompositionText, char16_t>
// : fmt::formatter<std::u16string_view, char16_t> {
// auto parse(fmt::basic_format_parse_context<char16_t>& ctx) {
// return fmt::formatter<std::u16string_view, char16_t>::parse(ctx);
// }
// template <typename FormatContext>
// auto format(const cru::platform::gui::CompositionText& ct,
// FormatContext& ctx) {
// auto output = ctx.out();
// output = format_to(output, u"text: {}\n", ct.text);
// output = format_to(output, u"clauses:\n");
// for (gsl::index i = 0; i < static_cast<gsl::index>(ct.clauses.size());
// i++) {
// const auto& clause = ct.clauses[i];
// output =
// format_to(output, u"\t{}. start: {} end: {}{}\n", i, clause.start,
// clause.end, clause.target ? u" target" : u"");
// }
// output = format_to(output, u"selection: position: {} count: {}",
// ct.selection.position, ct.selection.count);
// return output;
// }
// };
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