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Diffstat (limited to 'dom/svg/SVGEllipseElement.cpp')
| -rw-r--r-- | dom/svg/SVGEllipseElement.cpp | 193 |
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 |