1 files changed, 193 insertions, 0 deletions
diff --git a/dom/svg/SVGEllipseElement.cpp b/dom/svg/SVGEllipseElement.cpp
new file mode 100644
index 0000000000..b81d465915
--- /dev/null
+++ b/dom/svg/SVGEllipseElement.cpp
@@ -0,0 +1,193 @@
+/* -*- 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 "ComputedStyle.h"
+#include "mozilla/dom/SVGEllipseElement.h"
+#include "mozilla/dom/SVGEllipseElementBinding.h"
+#include "mozilla/dom/SVGLengthBinding.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/PathHelpers.h"
+#include "mozilla/RefPtr.h"
+#include "SVGGeometryProperty.h"
+
+NS_IMPL_NS_NEW_SVG_ELEMENT(Ellipse)
+
+using namespace mozilla::gfx;
+
+namespace mozilla::dom {
+
+JSObject* SVGEllipseElement::WrapNode(JSContext* aCx,
+                                      JS::Handle<JSObject*> aGivenProto) {
+  return SVGEllipseElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+SVGElement::LengthInfo SVGEllipseElement::sLengthInfo[4] = {
+    {nsGkAtoms::cx, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
+     SVGContentUtils::X},
+    {nsGkAtoms::cy, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
+     SVGContentUtils::Y},
+    {nsGkAtoms::rx, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
+     SVGContentUtils::X},
+    {nsGkAtoms::ry, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
+     SVGContentUtils::Y},
+};
+
+//----------------------------------------------------------------------
+// Implementation
+
+SVGEllipseElement::SVGEllipseElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+    : SVGEllipseElementBase(std::move(aNodeInfo)) {}
+
+bool SVGEllipseElement::IsAttributeMapped(const nsAtom* aAttribute) const {
+  return IsInLengthInfo(aAttribute, sLengthInfo) ||
+         SVGEllipseElementBase::IsAttributeMapped(aAttribute);
+}
+
+namespace SVGT = SVGGeometryProperty::Tags;
+
+//----------------------------------------------------------------------
+// nsINode methods
+
+NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGEllipseElement)
+
+//----------------------------------------------------------------------
+// nsIDOMSVGEllipseElement methods
+
+already_AddRefed<DOMSVGAnimatedLength> SVGEllipseElement::Cx() {
+  return mLengthAttributes[CX].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<DOMSVGAnimatedLength> SVGEllipseElement::Cy() {
+  return mLengthAttributes[CY].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<DOMSVGAnimatedLength> SVGEllipseElement::Rx() {
+  return mLengthAttributes[RX].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<DOMSVGAnimatedLength> SVGEllipseElement::Ry() {
+  return mLengthAttributes[RY].ToDOMAnimatedLength(this);
+}
+
+//----------------------------------------------------------------------
+// SVGElement methods
+
+/* virtual */
+bool SVGEllipseElement::HasValidDimensions() const {
+  float rx, ry;
+
+  if (SVGGeometryProperty::ResolveAll<SVGT::Rx, SVGT::Ry>(this, &rx, &ry)) {
+    return rx > 0 && ry > 0;
+  }
+  // This function might be called for an element in display:none subtree
+  // (e.g. SMIL animateMotion), we fall back to use SVG attributes.
+  bool hasRx = mLengthAttributes[RX].IsExplicitlySet();
+  bool hasRy = mLengthAttributes[RY].IsExplicitlySet();
+  if ((hasRx && mLengthAttributes[RX].GetAnimValInSpecifiedUnits() <= 0) ||
+      (hasRy && mLengthAttributes[RY].GetAnimValInSpecifiedUnits() <= 0)) {
+    return false;
+  }
+  return hasRx || hasRy;
+}
+
+SVGElement::LengthAttributesInfo SVGEllipseElement::GetLengthInfo() {
+  return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
+                              ArrayLength(sLengthInfo));
+}
+
+//----------------------------------------------------------------------
+// SVGGeometryElement methods
+
+bool SVGEllipseElement::GetGeometryBounds(
+    Rect* aBounds, const StrokeOptions& aStrokeOptions,
+    const Matrix& aToBoundsSpace, const Matrix* aToNonScalingStrokeSpace) {
+  float x, y, rx, ry;
+
+  DebugOnly<bool> ok =
+      SVGGeometryProperty::ResolveAll<SVGT::Cx, SVGT::Cy, SVGT::Rx, SVGT::Ry>(
+          this, &x, &y, &rx, &ry);
+  MOZ_ASSERT(ok, "SVGGeometryProperty::ResolveAll failed");
+
+  if (rx <= 0.f || ry <= 0.f) {
+    // Rendering of the element is disabled
+    *aBounds = Rect(aToBoundsSpace.TransformPoint(Point(x, y)), Size());
+    return true;
+  }
+
+  if (aToBoundsSpace.IsRectilinear()) {
+    // Optimize the case where we can treat the ellipse as a rectangle and
+    // still get tight bounds.
+    if (aStrokeOptions.mLineWidth > 0.f) {
+      if (aToNonScalingStrokeSpace) {
+        if (aToNonScalingStrokeSpace->IsRectilinear()) {
+          MOZ_ASSERT(!aToNonScalingStrokeSpace->IsSingular());
+          Rect userBounds(x - rx, y - ry, 2 * rx, 2 * ry);
+          SVGContentUtils::RectilinearGetStrokeBounds(
+              userBounds, aToBoundsSpace, *aToNonScalingStrokeSpace,
+              aStrokeOptions.mLineWidth, aBounds);
+          return true;
+        }
+        return false;
+      }
+      rx += aStrokeOptions.mLineWidth / 2.f;
+      ry += aStrokeOptions.mLineWidth / 2.f;
+    }
+    Rect rect(x - rx, y - ry, 2 * rx, 2 * ry);
+    *aBounds = aToBoundsSpace.TransformBounds(rect);
+    return true;
+  }
+
+  return false;
+}
+
+already_AddRefed<Path> SVGEllipseElement::BuildPath(PathBuilder* aBuilder) {
+  float x, y, rx, ry;
+
+  if (!SVGGeometryProperty::ResolveAll<SVGT::Cx, SVGT::Cy, SVGT::Rx, SVGT::Ry>(
+          this, &x, &y, &rx, &ry)) {
+    // This function might be called for element in display:none subtree
+    // (e.g. getTotalLength), we fall back to use SVG attributes.
+    GetAnimatedLengthValues(&x, &y, &rx, &ry, nullptr);
+  }
+
+  if (rx <= 0.0f || ry <= 0.0f) {
+    return nullptr;
+  }
+
+  EllipseToBezier(aBuilder, Point(x, y), Size(rx, ry));
+
+  return aBuilder->Finish();
+}
+
+bool SVGEllipseElement::IsLengthChangedViaCSS(const ComputedStyle& aNewStyle,
+                                              const ComputedStyle& aOldStyle) {
+  const auto& newSVGReset = *aNewStyle.StyleSVGReset();
+  const auto& oldSVGReset = *aOldStyle.StyleSVGReset();
+  return newSVGReset.mCx != oldSVGReset.mCx ||
+         newSVGReset.mCy != oldSVGReset.mCy ||
+         newSVGReset.mRx != oldSVGReset.mRx ||
+         newSVGReset.mRy != oldSVGReset.mRy;
+}
+
+nsCSSPropertyID SVGEllipseElement::GetCSSPropertyIdForAttrEnum(
+    uint8_t aAttrEnum) {
+  switch (aAttrEnum) {
+    case CX:
+      return eCSSProperty_cx;
+    case CY:
+      return eCSSProperty_cy;
+    case RX:
+      return eCSSProperty_rx;
+    case RY:
+      return eCSSProperty_ry;
+    default:
+      MOZ_ASSERT_UNREACHABLE("Unknown attr enum");
+      return eCSSProperty_UNKNOWN;
+  }
+}
+
+}  // namespace mozilla::dom