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1 files changed, 102 insertions, 0 deletions

diff --git a/include/cru/ui/render/BorderRenderObject.hpp b/include/cru/ui/render/BorderRenderObject.hpp
new file mode 100644
index 00000000..c3031f59
--- /dev/null
+++ b/include/cru/ui/render/BorderRenderObject.hpp
@@ -0,0 +1,102 @@
+#pragma once
+#include "RenderObject.hpp"
+
+namespace cru::ui::render {
+class BorderRenderObject : public RenderObject {
+ public:
+  BorderRenderObject();
+  BorderRenderObject(const BorderRenderObject& other) = delete;
+  BorderRenderObject(BorderRenderObject&& other) = delete;
+  BorderRenderObject& operator=(const BorderRenderObject& other) = delete;
+  BorderRenderObject& operator=(BorderRenderObject&& other) = delete;
+  ~BorderRenderObject() override;
+
+  bool IsBorderEnabled() const { return is_border_enabled_; }
+  void SetBorderEnabled(bool enabled) { is_border_enabled_ = enabled; }
+
+  std::shared_ptr<platform::graph::IBrush> GetBorderBrush() {
+    return border_brush_;
+  }
+
+  void SetBorderBrush(std::shared_ptr<platform::graph::IBrush> brush) {
+    if (brush == border_brush_) return;
+    border_brush_ = std::move(brush);
+    InvalidatePaint();
+  }
+
+  Thickness GetBorderThickness() { return border_thickness_; }
+
+  void SetBorderThickness(const Thickness thickness) {
+    if (thickness == border_thickness_) return;
+    border_thickness_ = thickness;
+    InvalidateLayout();
+  }
+
+  CornerRadius GetBorderRadius() { return border_radius_; }
+
+  void SetBorderRadius(const CornerRadius radius) {
+    if (radius == border_radius_) return;
+    border_radius_ = radius;
+    RecreateGeometry();
+  }
+
+  std::shared_ptr<platform::graph::IBrush> GetForegroundBrush() {
+    return foreground_brush_;
+  }
+
+  void SetForegroundBrush(std::shared_ptr<platform::graph::IBrush> brush) {
+    if (brush == foreground_brush_) return;
+    foreground_brush_ = std::move(brush);
+    InvalidatePaint();
+  }
+
+  std::shared_ptr<platform::graph::IBrush> GetBackgroundBrush() {
+    return background_brush_;
+  }
+
+  void SetBackgroundBrush(std::shared_ptr<platform::graph::IBrush> brush) {
+    if (brush == background_brush_) return;
+    background_brush_ = std::move(brush);
+    InvalidatePaint();
+  }
+
+  void SetBorderStyle(const BorderStyle& style);
+
+  void Draw(platform::graph::IPainter* painter) override;
+
+  RenderObject* HitTest(const Point& point) override;
+
+ protected:
+  void OnMeasureCore(const Size& available_size) override;
+  void OnLayoutCore(const Rect& rect) override;
+  Size OnMeasureContent(const Size& available_size) override;
+  void OnLayoutContent(const Rect& content_rect) override;
+
+  void OnAfterLayout() override;
+
+ private:
+  RenderObject* GetChild() const {
+    return GetChildren().empty() ? nullptr : GetChildren()[0];
+  }
+
+  void RecreateGeometry();
+
+ private:
+  bool is_border_enabled_ = false;
+
+  std::shared_ptr<platform::graph::IBrush> border_brush_;
+  platform::Thickness border_thickness_;
+  CornerRadius border_radius_;
+
+  std::shared_ptr<platform::graph::IBrush> foreground_brush_;
+  std::shared_ptr<platform::graph::IBrush> background_brush_;
+
+  // The ring. Used for painting.
+  std::unique_ptr<platform::graph::IGeometry> geometry_;
+  // Area including inner area of the border. Used for painting foreground and
+  // background.
+  std::unique_ptr<platform::graph::IGeometry> border_inner_geometry_;
+  // Area including border ring and inner area. Used for hit test.
+  std::unique_ptr<platform::graph::IGeometry> border_outer_geometry_;
+};
+}  // namespace cru::ui::render