1 files changed, 118 insertions, 0 deletions
diff --git a/dom/svg/SVGPolyElement.cpp b/dom/svg/SVGPolyElement.cpp
new file mode 100644
index 0000000000..23d5d5a2f8
--- /dev/null
+++ b/dom/svg/SVGPolyElement.cpp
@@ -0,0 +1,118 @@
+/* -*- 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 "SVGPolyElement.h"
+#include "DOMSVGPointList.h"
+#include "mozilla/gfx/2D.h"
+#include "SVGContentUtils.h"
+
+using namespace mozilla::gfx;
+
+namespace mozilla::dom {
+
+//----------------------------------------------------------------------
+// Implementation
+
+SVGPolyElement::SVGPolyElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+    : SVGPolyElementBase(std::move(aNodeInfo)) {}
+
+already_AddRefed<DOMSVGPointList> SVGPolyElement::Points() {
+  void* key = mPoints.GetBaseValKey();
+  RefPtr<DOMSVGPointList> points =
+      DOMSVGPointList::GetDOMWrapper(key, this, false);
+  return points.forget();
+}
+
+already_AddRefed<DOMSVGPointList> SVGPolyElement::AnimatedPoints() {
+  void* key = mPoints.GetAnimValKey();
+  RefPtr<DOMSVGPointList> points =
+      DOMSVGPointList::GetDOMWrapper(key, this, true);
+  return points.forget();
+}
+
+//----------------------------------------------------------------------
+// SVGElement methods
+
+/* virtual */
+bool SVGPolyElement::HasValidDimensions() const {
+  return !mPoints.GetAnimValue().IsEmpty();
+}
+
+//----------------------------------------------------------------------
+// SVGGeometryElement methods
+
+bool SVGPolyElement::AttributeDefinesGeometry(const nsAtom* aName) {
+  return aName == nsGkAtoms::points;
+}
+
+void SVGPolyElement::GetMarkPoints(nsTArray<SVGMark>* aMarks) {
+  const SVGPointList& points = mPoints.GetAnimValue();
+
+  if (!points.Length()) return;
+
+  float px = points[0].mX, py = points[0].mY, prevAngle = 0.0;
+
+  aMarks->AppendElement(SVGMark(px, py, 0, SVGMark::eStart));
+
+  for (uint32_t i = 1; i < points.Length(); ++i) {
+    float x = points[i].mX;
+    float y = points[i].mY;
+    float angle = std::atan2(y - py, x - px);
+
+    // Vertex marker.
+    if (i == 1) {
+      aMarks->ElementAt(0).angle = angle;
+    } else {
+      aMarks->ElementAt(aMarks->Length() - 1).angle =
+          SVGContentUtils::AngleBisect(prevAngle, angle);
+    }
+
+    aMarks->AppendElement(SVGMark(x, y, 0, SVGMark::eMid));
+
+    prevAngle = angle;
+    px = x;
+    py = y;
+  }
+
+  aMarks->LastElement().angle = prevAngle;
+  aMarks->LastElement().type = SVGMark::eEnd;
+}
+
+bool SVGPolyElement::GetGeometryBounds(Rect* aBounds,
+                                       const StrokeOptions& aStrokeOptions,
+                                       const Matrix& aToBoundsSpace,
+                                       const Matrix* aToNonScalingStrokeSpace) {
+  const SVGPointList& points = mPoints.GetAnimValue();
+
+  if (!points.Length()) {
+    // Rendering of the element is disabled
+    aBounds->SetEmpty();
+    return true;
+  }
+
+  if (aStrokeOptions.mLineWidth > 0 || aToNonScalingStrokeSpace) {
+    // We don't handle non-scaling-stroke or stroke-miterlimit etc. yet
+    return false;
+  }
+
+  if (aToBoundsSpace.IsRectilinear()) {
+    // We can avoid transforming each point and just transform the result.
+    // Important for large point lists.
+    Rect bounds(points[0], Size());
+    for (uint32_t i = 1; i < points.Length(); ++i) {
+      bounds.ExpandToEnclose(points[i]);
+    }
+    *aBounds = aToBoundsSpace.TransformBounds(bounds);
+  } else {
+    *aBounds = Rect(aToBoundsSpace.TransformPoint(points[0]), Size());
+    for (uint32_t i = 1; i < points.Length(); ++i) {
+      aBounds->ExpandToEnclose(aToBoundsSpace.TransformPoint(points[i]));
+    }
+  }
+  return true;
+}
+}  // namespace mozilla::dom