From ab484b2f0a8541cc5c5a172e4f5ea2620d91c8ba Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 12 Oct 2023 20:10:07 +0800
Subject: SvgGeometryBuilder done!

---
 include/cru/platform/graphics/Geometry.h    |  2 +-
 include/cru/platform/graphics/SvgGeometry.h | 57 +++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 1 deletion(-)

(limited to 'include/cru/platform/graphics')

diff --git a/include/cru/platform/graphics/Geometry.h b/include/cru/platform/graphics/Geometry.h
index 112c95e6..0e0278d2 100644
--- a/include/cru/platform/graphics/Geometry.h
+++ b/include/cru/platform/graphics/Geometry.h
@@ -61,7 +61,7 @@ struct CRU_PLATFORM_GRAPHICS_API IGeometryBuilder : virtual IGraphicsResource {
 
   virtual std::unique_ptr<IGeometry> Build() = 0;
 
-  void ParseAndApplySvgPathData(StringView path_d);
+  virtual void ParseAndApplySvgPathData(StringView path_d);
 };
 
 std::unique_ptr<IGeometry> CRU_PLATFORM_GRAPHICS_API
diff --git a/include/cru/platform/graphics/SvgGeometry.h b/include/cru/platform/graphics/SvgGeometry.h
index 742a68ca..65602578 100644
--- a/include/cru/platform/graphics/SvgGeometry.h
+++ b/include/cru/platform/graphics/SvgGeometry.h
@@ -1,16 +1,73 @@
 #pragma once
 
 #include "Geometry.h"
+#include "cru/common/Base.h"
+#include "cru/common/Format.h"
+
+#include <utility>
 
 namespace cru::platform::graphics {
+/**
+ * \remarks This class is purely a helper for some platforms, especially web
+ * canvas. It constructs a path data of svg of a list of commands. It can't
+ * generate a Geometry. Calling Build will throw a PlatformUnsupportedException.
+ * Instead, use GetPathData to get svg path data and use it to do other things.
+ */
 class CRU_PLATFORM_GRAPHICS_API SvgGeometryBuilder
     : public Object,
       public virtual IGeometryBuilder {
  public:
   SvgGeometryBuilder();
 
+  CRU_DELETE_COPY(SvgGeometryBuilder)
+  CRU_DELETE_MOVE(SvgGeometryBuilder)
+
   ~SvgGeometryBuilder() override;
 
+  Point GetCurrentPosition() override;
+
+  void MoveTo(const Point& point) override;
+  void RelativeMoveTo(const Point& offset) override;
+
+  void LineTo(const Point& point) override;
+  void RelativeLineTo(const Point& offset) override;
+
+  void CubicBezierTo(const Point& start_control_point,
+                     const Point& end_control_point,
+                     const Point& end_point) override;
+  void RelativeCubicBezierTo(const Point& start_control_offset,
+                             const Point& end_control_offset,
+                             const Point& end_offset) override;
+
+  void QuadraticBezierTo(const Point& control_point,
+                         const Point& end_point) override;
+  void RelativeQuadraticBezierTo(const Point& control_offset,
+                                 const Point& end_offset) override;
+
+  void ArcTo(const Point& radius, float angle, bool is_large_arc,
+             bool is_clockwise, const Point& end_point) override;
+  void RelativeArcTo(const Point& radius, float angle, bool is_large_arc,
+                     bool is_clockwise, const Point& end_offset) override;
+
+  void CloseFigure(bool close) override;
+
+  std::unique_ptr<IGeometry> Build() override;
+
+  String GetPathData() const { return current_; }
+
+  void ParseAndApplySvgPathData(StringView path_d) override;
+
+  template <typename... Args>
+  void Append(StringView format, Args&&... args) {
+    current_ += Format(format, std::forward<Args>(args)...);
+    current_ += u' ';
+  }
+
+  void AppendCommand(StringView command);
+  void Append(bool flag);
+  void Append(float number);
+  void Append(const Point& point);
+
  private:
   String current_;
 };
-- 
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