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Diffstat (limited to '')
| -rw-r--r-- | dom/svg/SVGCircleElement.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/dom/svg/SVGCircleElement.cpp b/dom/svg/SVGCircleElement.cpp new file mode 100644 index 0000000000..c3f4beb40d --- /dev/null +++ b/dom/svg/SVGCircleElement.cpp @@ -0,0 +1,174 @@ +/* -*- 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/SVGCircleElement.h" +#include "mozilla/gfx/2D.h" +#include "nsGkAtoms.h" +#include "mozilla/dom/SVGCircleElementBinding.h" +#include "mozilla/dom/SVGLengthBinding.h" +#include "SVGGeometryProperty.h" + +NS_IMPL_NS_NEW_SVG_ELEMENT(Circle) + +using namespace mozilla::gfx; + +namespace mozilla::dom { + +JSObject* SVGCircleElement::WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return SVGCircleElement_Binding::Wrap(aCx, this, aGivenProto); +} + +SVGElement::LengthInfo SVGCircleElement::sLengthInfo[3] = { + {nsGkAtoms::cx, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, + SVGContentUtils::X}, + {nsGkAtoms::cy, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, + SVGContentUtils::Y}, + {nsGkAtoms::r, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, + SVGContentUtils::XY}}; + +//---------------------------------------------------------------------- +// Implementation + +SVGCircleElement::SVGCircleElement( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo) + : SVGCircleElementBase(std::move(aNodeInfo)) {} + +bool SVGCircleElement::IsAttributeMapped(const nsAtom* aAttribute) const { + return IsInLengthInfo(aAttribute, sLengthInfo) || + SVGCircleElementBase::IsAttributeMapped(aAttribute); +} + +namespace SVGT = SVGGeometryProperty::Tags; + +//---------------------------------------------------------------------- +// nsINode methods + +NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGCircleElement) + +//---------------------------------------------------------------------- + +already_AddRefed<DOMSVGAnimatedLength> SVGCircleElement::Cx() { + return mLengthAttributes[ATTR_CX].ToDOMAnimatedLength(this); +} + +already_AddRefed<DOMSVGAnimatedLength> SVGCircleElement::Cy() { + return mLengthAttributes[ATTR_CY].ToDOMAnimatedLength(this); +} + +already_AddRefed<DOMSVGAnimatedLength> SVGCircleElement::R() { + return mLengthAttributes[ATTR_R].ToDOMAnimatedLength(this); +} + +//---------------------------------------------------------------------- +// SVGElement methods + +/* virtual */ +bool SVGCircleElement::HasValidDimensions() const { + float r; + + if (SVGGeometryProperty::ResolveAll<SVGT::R>(this, &r)) { + return r > 0; + } + // This function might be called for an element in display:none subtree + // (e.g. SMIL animateMotion), we fall back to use SVG attributes. + return mLengthAttributes[ATTR_R].IsExplicitlySet() && + mLengthAttributes[ATTR_R].GetAnimValInSpecifiedUnits() > 0; +} + +SVGElement::LengthAttributesInfo SVGCircleElement::GetLengthInfo() { + return LengthAttributesInfo(mLengthAttributes, sLengthInfo, + ArrayLength(sLengthInfo)); +} + +//---------------------------------------------------------------------- +// SVGGeometryElement methods + +bool SVGCircleElement::GetGeometryBounds( + Rect* aBounds, const StrokeOptions& aStrokeOptions, + const Matrix& aToBoundsSpace, const Matrix* aToNonScalingStrokeSpace) { + float x, y, r; + + DebugOnly<bool> ok = + SVGGeometryProperty::ResolveAll<SVGT::Cx, SVGT::Cy, SVGT::R>(this, &x, &y, + &r); + MOZ_ASSERT(ok, "SVGGeometryProperty::ResolveAll failed"); + + if (r <= 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 circle 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 - r, y - r, 2 * r, 2 * r); + SVGContentUtils::RectilinearGetStrokeBounds( + userBounds, aToBoundsSpace, *aToNonScalingStrokeSpace, + aStrokeOptions.mLineWidth, aBounds); + return true; + } + return false; + } + r += aStrokeOptions.mLineWidth / 2.f; + } + Rect rect(x - r, y - r, 2 * r, 2 * r); + *aBounds = aToBoundsSpace.TransformBounds(rect); + return true; + } + + return false; +} + +already_AddRefed<Path> SVGCircleElement::BuildPath(PathBuilder* aBuilder) { + float x, y, r; + if (!SVGGeometryProperty::ResolveAll<SVGT::Cx, SVGT::Cy, SVGT::R>(this, &x, + &y, &r)) { + // This function might be called for element in display:none subtree + // (e.g. getTotalLength), we fall back to use SVG attributes. + GetAnimatedLengthValues(&x, &y, &r, nullptr); + } + + if (r <= 0.0f) { + return nullptr; + } + + aBuilder->Arc(Point(x, y), r, 0, Float(2 * M_PI)); + + return aBuilder->Finish(); +} + +bool SVGCircleElement::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.mR != oldSVGReset.mR; +} + +nsCSSPropertyID SVGCircleElement::GetCSSPropertyIdForAttrEnum( + uint8_t aAttrEnum) { + switch (aAttrEnum) { + case ATTR_CX: + return eCSSProperty_cx; + case ATTR_CY: + return eCSSProperty_cy; + case ATTR_R: + return eCSSProperty_r; + default: + MOZ_ASSERT_UNREACHABLE("Unknown attr enum"); + return eCSSProperty_UNKNOWN; + } +} + +} // namespace mozilla::dom |