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1 files changed, 66 insertions, 0 deletions

diff --git a/include/cru/ui/controls/text_common.hpp b/include/cru/ui/controls/text_common.hpp
new file mode 100644
index 00000000..7398764f
--- /dev/null
+++ b/include/cru/ui/controls/text_common.hpp
@@ -0,0 +1,66 @@
+#pragma once
+#include "../base.hpp"
+
+#include "cru/ui/ui_event.hpp"
+
+#include <functional>
+#include <optional>
+
+namespace cru::platform::graph {
+struct IBrush;
+}
+
+namespace cru::ui::render {
+class TextRenderObject;
+class CanvasRenderObject;
+}  // namespace cru::ui::render
+
+namespace cru::ui::controls {
+
+struct ITextControl : virtual Interface {
+  virtual render::TextRenderObject* GetTextRenderObject() = 0;
+  virtual render::CanvasRenderObject* GetCaretRenderObject() = 0;
+  virtual platform::graph::IBrush* GetCaretBrush() = 0;
+};
+
+class TextControlService : public Object {
+ public:
+  TextControlService(Control* control, ITextControl* text_control);
+
+  CRU_DELETE_COPY(TextControlService)
+  CRU_DELETE_MOVE(TextControlService)
+
+  ~TextControlService();
+
+ public:
+  int GetCaretPosition() { return caret_position_; }
+  void SetCaretPosition(int position) { caret_position_ = position; }
+
+  bool IsCaretVisible() { return caret_visible_; }
+  void SetCaretVisible(bool visible);
+
+  // please set correct offset before calling this
+  void DrawCaret(platform::graph::IPainter* painter);
+
+ private:
+  void SetupCaretTimer();
+  void TearDownCaretTimer();
+
+ private:
+  Control* control_;
+  ITextControl* text_control_;
+  std::vector<EventRevokerGuard> event_revoker_guards_;
+
+  bool caret_visible_ = false;
+  int caret_position_ = 0;
+  unsigned long caret_timer_tag_;
+  // this is used for blinking of caret
+  bool caret_show_ = true;
+
+  // nullopt means not selecting
+  std::optional<MouseButton> select_down_button_;
+
+  // before the char
+  int select_start_position_;
+};
+}  // namespace cru::ui::controls