Make svg geometry builder a mixin. Record a lot of notes for geometry.

1 files changed, 121 insertions, 0 deletions

diff --git a/src/platform/graphics/SvgGeometryBuilderMixin.cpp b/src/platform/graphics/SvgGeometryBuilderMixin.cpp
new file mode 100644
index 00000000..1f868f44
--- /dev/null
+++ b/src/platform/graphics/SvgGeometryBuilderMixin.cpp
@@ -0,0 +1,121 @@
+#include "cru/platform/graphics/SvgGeometryBuilderMixin.h"
+#include "cru/platform/Exception.h"
+
+namespace cru::platform::graphics {
+SvgGeometryBuilderMixin::SvgGeometryBuilderMixin() {}
+
+SvgGeometryBuilderMixin::~SvgGeometryBuilderMixin() {}
+
+Point SvgGeometryBuilderMixin::GetCurrentPosition() {
+  throw PlatformUnsupportedException(
+      GetPlatformId(), u"GetCurrentPosition",
+      u"Svg-based geometry does not support get current position.");
+}
+
+void SvgGeometryBuilderMixin::MoveTo(const Point& point) {
+  AppendCommand(u"M");
+  Append(point);
+}
+
+void SvgGeometryBuilderMixin::RelativeMoveTo(const Point& offset) {
+  AppendCommand(u"m");
+  Append(offset);
+}
+
+void SvgGeometryBuilderMixin::LineTo(const Point& point) {
+  AppendCommand(u"L");
+  Append(point);
+}
+
+void SvgGeometryBuilderMixin::RelativeLineTo(const Point& offset) {
+  AppendCommand(u"l");
+  Append(offset);
+}
+
+void SvgGeometryBuilderMixin::CubicBezierTo(const Point& start_control_point,
+                                            const Point& end_control_point,
+                                            const Point& end_point) {
+  AppendCommand(u"C");
+  Append(start_control_point);
+  Append(end_control_point);
+  Append(end_point);
+}
+
+void SvgGeometryBuilderMixin::RelativeCubicBezierTo(
+    const Point& start_control_offset, const Point& end_control_offset,
+    const Point& end_offset) {
+  AppendCommand(u"c");
+  Append(start_control_offset);
+  Append(end_control_offset);
+  Append(end_offset);
+}
+
+void SvgGeometryBuilderMixin::QuadraticBezierTo(const Point& control_point,
+                                                const Point& end_point) {
+  AppendCommand(u"Q");
+  Append(control_point);
+  Append(end_point);
+}
+
+void SvgGeometryBuilderMixin::RelativeQuadraticBezierTo(
+    const Point& control_offset, const Point& end_offset) {
+  AppendCommand(u"q");
+  Append(control_offset);
+  Append(end_offset);
+}
+
+void SvgGeometryBuilderMixin::ArcTo(const Point& radius, float angle,
+                                    bool is_large_arc, bool is_clockwise,
+                                    const Point& end_point) {
+  AppendCommand(u"A");
+  Append(radius.x);
+  Append(radius.y);
+  Append(angle);
+  Append(is_large_arc);
+  Append(is_clockwise);
+  Append(end_point);
+}
+
+void SvgGeometryBuilderMixin::RelativeArcTo(const Point& radius, float angle,
+                                            bool is_large_arc,
+                                            bool is_clockwise,
+                                            const Point& end_offset) {
+  AppendCommand(u"a");
+  Append(radius.x);
+  Append(radius.y);
+  Append(angle);
+  Append(is_large_arc);
+  Append(is_clockwise);
+  Append(end_offset);
+}
+
+void SvgGeometryBuilderMixin::CloseFigure(bool close) {
+  if (close) AppendCommand(u"z");
+}
+
+void SvgGeometryBuilderMixin::ParseAndApplySvgPathData(StringView path_d) {
+  AppendCommand(path_d);
+}
+
+void SvgGeometryBuilderMixin::AppendCommand(StringView command) {
+  current_ += command;
+  current_ += u' ';
+}
+
+void SvgGeometryBuilderMixin::Append(bool flag) {
+  current_ += flag ? u'1' : u'0';
+  current_ += u' ';
+}
+
+void SvgGeometryBuilderMixin::Append(float number) {
+  current_ += ToString(number);
+  current_ += u' ';
+}
+
+void SvgGeometryBuilderMixin::Append(const Point& point) {
+  current_ += ToString(point.x);
+  current_ += u',';
+  current_ += ToString(point.y);
+  current_ += u' ';
+}
+}  // namespace cru::platform::graphics