154 lines
4.5 KiB
C++
154 lines
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/SVGEllipseElement.h"
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#include "mozilla/dom/SVGEllipseElementBinding.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/RefPtr.h"
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NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Ellipse)
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using namespace mozilla::gfx;
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namespace mozilla {
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namespace dom {
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JSObject*
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SVGEllipseElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return SVGEllipseElementBinding::Wrap(aCx, this, aGivenProto);
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}
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nsSVGElement::LengthInfo SVGEllipseElement::sLengthInfo[4] =
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{
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{ &nsGkAtoms::cx, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
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{ &nsGkAtoms::cy, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
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{ &nsGkAtoms::rx, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
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{ &nsGkAtoms::ry, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
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};
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//----------------------------------------------------------------------
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// Implementation
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SVGEllipseElement::SVGEllipseElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: SVGEllipseElementBase(aNodeInfo)
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{
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}
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//----------------------------------------------------------------------
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// nsIDOMNode methods
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NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGEllipseElement)
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//----------------------------------------------------------------------
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// nsIDOMSVGEllipseElement methods
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already_AddRefed<SVGAnimatedLength>
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SVGEllipseElement::Cx()
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{
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return mLengthAttributes[CX].ToDOMAnimatedLength(this);
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}
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already_AddRefed<SVGAnimatedLength>
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SVGEllipseElement::Cy()
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{
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return mLengthAttributes[CY].ToDOMAnimatedLength(this);
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}
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already_AddRefed<SVGAnimatedLength>
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SVGEllipseElement::Rx()
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{
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return mLengthAttributes[RX].ToDOMAnimatedLength(this);
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}
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already_AddRefed<SVGAnimatedLength>
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SVGEllipseElement::Ry()
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{
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return mLengthAttributes[RY].ToDOMAnimatedLength(this);
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}
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//----------------------------------------------------------------------
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// nsSVGElement methods
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/* virtual */ bool
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SVGEllipseElement::HasValidDimensions() const
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{
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return mLengthAttributes[RX].IsExplicitlySet() &&
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mLengthAttributes[RX].GetAnimValInSpecifiedUnits() > 0 &&
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mLengthAttributes[RY].IsExplicitlySet() &&
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mLengthAttributes[RY].GetAnimValInSpecifiedUnits() > 0;
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}
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nsSVGElement::LengthAttributesInfo
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SVGEllipseElement::GetLengthInfo()
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{
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return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
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ArrayLength(sLengthInfo));
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}
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//----------------------------------------------------------------------
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// nsSVGPathGeometryElement methods
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bool
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SVGEllipseElement::GetGeometryBounds(Rect* aBounds,
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const StrokeOptions& aStrokeOptions,
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const Matrix& aToBoundsSpace,
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const Matrix* aToNonScalingStrokeSpace)
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{
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float x, y, rx, ry;
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GetAnimatedLengthValues(&x, &y, &rx, &ry, nullptr);
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if (rx <= 0.f || ry <= 0.f) {
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// Rendering of the element is disabled
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*aBounds = Rect(aToBoundsSpace * Point(x, y), Size());
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return true;
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}
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if (aToBoundsSpace.IsRectilinear()) {
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// Optimize the case where we can treat the ellipse as a rectangle and
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// still get tight bounds.
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if (aStrokeOptions.mLineWidth > 0.f) {
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if (aToNonScalingStrokeSpace) {
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if (aToNonScalingStrokeSpace->IsRectilinear()) {
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MOZ_ASSERT(!aToNonScalingStrokeSpace->IsSingular());
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Rect userBounds(x - rx, y - ry, 2 * rx, 2 * ry);
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SVGContentUtils::RectilinearGetStrokeBounds(
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userBounds, aToBoundsSpace, *aToNonScalingStrokeSpace,
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aStrokeOptions.mLineWidth, aBounds);
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return true;
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}
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return false;
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}
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rx += aStrokeOptions.mLineWidth / 2.f;
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ry += aStrokeOptions.mLineWidth / 2.f;
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}
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Rect rect(x - rx, y - ry, 2 * rx, 2 * ry);
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*aBounds = aToBoundsSpace.TransformBounds(rect);
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return true;
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}
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return false;
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}
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already_AddRefed<Path>
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SVGEllipseElement::BuildPath(PathBuilder* aBuilder)
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{
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float x, y, rx, ry;
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GetAnimatedLengthValues(&x, &y, &rx, &ry, nullptr);
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if (rx <= 0.0f || ry <= 0.0f) {
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return nullptr;
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}
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EllipseToBezier(aBuilder, Point(x, y), Size(rx, ry));
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return aBuilder->Finish();
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}
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} // namespace dom
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} // namespace mozilla
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