IME

Signed-off-by: Slendi <slendi@socopon.com>

src/ImGui.hpp

@@ -3,6 +3,8 @@
 #include <bitset>
 #include <memory>
 #include <optional>
+#include <string>
+#include <unordered_map>
 
 #include <raylib.h>
 
@@ -31,6 +33,30 @@ struct ImGui {
 	auto text_input(std::size_t id, std::pmr::string &str, Rectangle rec,
 	    TextInputOptions options = {}) -> std::bitset<2>;
 
+	struct TextInputSurrounding {
+		std::string text;
+		int cursor { 0 };
+		int anchor { 0 };
+		std::size_t caret_byte { 0 };
+	};
+
+	struct TextInputCursor {
+		Rectangle rect {};
+		bool visible { true };
+	};
+
+	auto focused_text_input() const -> std::optional<std::size_t>;
+	auto text_input_surrounding(
+	    std::size_t id, std::pmr::string const &str) const
+	    -> std::optional<TextInputSurrounding>;
+	auto text_input_cursor(std::size_t id) const
+	    -> std::optional<TextInputCursor>;
+	void ime_commit_text(std::pmr::string &str, std::string_view text);
+	void ime_delete_surrounding(
+	    std::pmr::string &str, std::size_t before, std::size_t after);
+	void ime_set_preedit(std::string text, int cursor_begin, int cursor_end);
+	void ime_clear_preedit();
+
 	void set_font(FontHandle font);
 
 	[[nodiscard]] inline auto id(std::string_view const str) -> std::size_t
@@ -46,6 +72,14 @@ private:
 		Vector2 cursor_position; // y not used if multiline == false
 		bool caret_visible { true };
 		double caret_timer { 0.0 };
+		std::string preedit_text;
+		int preedit_cursor_begin { 0 };
+		int preedit_cursor_end { 0 };
+		bool preedit_active { false };
+		bool preedit_cursor_hidden { false };
+		std::size_t caret_byte { 0 };
+		Rectangle caret_rect {};
+		bool external_change { false };
 	};
 
 	std::unordered_map<std::size_t, TextInputState> m_ti_states;