1 files changed, 77 insertions, 0 deletions
diff --git a/dom/svg/SVGPolygonElement.cpp b/dom/svg/SVGPolygonElement.cpp
new file mode 100644
index 0000000000..def8015153
--- /dev/null
+++ b/dom/svg/SVGPolygonElement.cpp
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/SVGPolygonElement.h"
+#include "mozilla/dom/SVGPolygonElementBinding.h"
+#include "mozilla/gfx/2D.h"
+#include "SVGContentUtils.h"
+
+using namespace mozilla::gfx;
+
+NS_IMPL_NS_NEW_SVG_ELEMENT(Polygon)
+
+namespace mozilla::dom {
+
+JSObject* SVGPolygonElement::WrapNode(JSContext* aCx,
+                                      JS::Handle<JSObject*> aGivenProto) {
+  return SVGPolygonElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+//----------------------------------------------------------------------
+// Implementation
+
+SVGPolygonElement::SVGPolygonElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+    : SVGPolygonElementBase(std::move(aNodeInfo)) {}
+
+//----------------------------------------------------------------------
+// nsINode methods
+
+NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGPolygonElement)
+
+//----------------------------------------------------------------------
+// SVGGeometryElement methods
+
+void SVGPolygonElement::GetMarkPoints(nsTArray<SVGMark>* aMarks) {
+  SVGPolyElement::GetMarkPoints(aMarks);
+
+  if (aMarks->IsEmpty() || aMarks->LastElement().type != SVGMark::eEnd) {
+    return;
+  }
+
+  SVGMark* endMark = &aMarks->LastElement();
+  SVGMark* startMark = &aMarks->ElementAt(0);
+  float angle =
+      std::atan2(startMark->y - endMark->y, startMark->x - endMark->x);
+
+  endMark->type = SVGMark::eMid;
+  endMark->angle = SVGContentUtils::AngleBisect(angle, endMark->angle);
+  startMark->angle = SVGContentUtils::AngleBisect(angle, startMark->angle);
+  // for a polygon (as opposed to a polyline) there's an implicit extra point
+  // co-located with the start point that SVGPolyElement::GetMarkPoints
+  // doesn't return
+  aMarks->AppendElement(
+      SVGMark(startMark->x, startMark->y, startMark->angle, SVGMark::eEnd));
+}
+
+already_AddRefed<Path> SVGPolygonElement::BuildPath(PathBuilder* aBuilder) {
+  const SVGPointList& points = mPoints.GetAnimValue();
+
+  if (points.IsEmpty()) {
+    return nullptr;
+  }
+
+  aBuilder->MoveTo(points[0]);
+  for (uint32_t i = 1; i < points.Length(); ++i) {
+    aBuilder->LineTo(points[i]);
+  }
+
+  aBuilder->Close();
+
+  return aBuilder->Finish();
+}
+
+}  // namespace mozilla::dom