1 files changed, 85 insertions, 0 deletions
diff --git a/include/cru/ui/render/TextRenderObject.hpp b/include/cru/ui/render/TextRenderObject.hpp
new file mode 100644
index 00000000..7a81ba51
--- /dev/null
+++ b/include/cru/ui/render/TextRenderObject.hpp
@@ -0,0 +1,85 @@
+#pragma once
+#include "RenderObject.hpp"
+
+#include <string>
+
+namespace cru::ui::render {
+class TextRenderObject : public RenderObject {
+ public:
+  constexpr static float default_caret_width = 2;
+
+ public:
+  TextRenderObject(std::shared_ptr<platform::graph::IBrush> brush,
+                   std::shared_ptr<platform::graph::IFont> font,
+                   std::shared_ptr<platform::graph::IBrush> selection_brush,
+                   std::shared_ptr<platform::graph::IBrush> caret_brush);
+  TextRenderObject(const TextRenderObject& other) = delete;
+  TextRenderObject(TextRenderObject&& other) = delete;
+  TextRenderObject& operator=(const TextRenderObject& other) = delete;
+  TextRenderObject& operator=(TextRenderObject&& other) = delete;
+  ~TextRenderObject() override;
+
+  std::string GetText() const;
+  void SetText(std::string new_text);
+
+  std::shared_ptr<platform::graph::IBrush> GetBrush() const { return brush_; }
+  void SetBrush(std::shared_ptr<platform::graph::IBrush> new_brush);
+
+  std::shared_ptr<platform::graph::IFont> GetFont() const;
+  void SetFont(std::shared_ptr<platform::graph::IFont> font);
+
+  std::vector<Rect> TextRangeRect(const TextRange& text_range);
+  Point TextSinglePoint(gsl::index position, bool trailing);
+  platform::graph::TextHitTestResult TextHitTest(const Point& point);
+
+  std::optional<TextRange> GetSelectionRange() const {
+    return selection_range_;
+  }
+  void SetSelectionRange(std::optional<TextRange> new_range);
+
+  std::shared_ptr<platform::graph::IBrush> GetSelectionBrush() const {
+    return selection_brush_;
+  }
+  void SetSelectionBrush(std::shared_ptr<platform::graph::IBrush> new_brush);
+
+  bool IsDrawCaret() const { return draw_caret_; }
+  void SetDrawCaret(bool draw_caret);
+  void ToggleDrawCaret() { SetDrawCaret(!IsDrawCaret()); }
+
+  // Caret position can be any value. When it is negative, 0 is used. When it
+  // exceeds the size of the string, the size of the string is used.
+  gsl::index GetCaretPosition() const { return caret_position_; }
+  void SetCaretPosition(gsl::index position);
+
+  std::shared_ptr<platform::graph::IBrush> GetCaretBrush() const {
+    return caret_brush_;
+  }
+  void GetCaretBrush(std::shared_ptr<platform::graph::IBrush> brush);
+
+  float GetCaretWidth() const { return caret_width_; }
+  void SetCaretWidth(float width);
+
+  void Draw(platform::graph::IPainter* painter) override;
+
+  RenderObject* HitTest(const Point& point) override;
+
+ protected:
+  Size OnMeasureContent(const Size& available_size) override;
+  void OnLayoutContent(const Rect& content_rect) override;
+
+  void OnAfterLayout() override;
+
+ private:
+  std::shared_ptr<platform::graph::IBrush> brush_;
+  std::shared_ptr<platform::graph::IFont> font_;
+  std::unique_ptr<platform::graph::ITextLayout> text_layout_;
+
+  std::optional<TextRange> selection_range_ = std::nullopt;
+  std::shared_ptr<platform::graph::IBrush> selection_brush_;
+
+  bool draw_caret_ = false;
+  gsl::index caret_position_ = 0;
+  std::shared_ptr<platform::graph::IBrush> caret_brush_;
+  float caret_width_ = default_caret_width;
+};
+}  // namespace cru::ui::render