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/* -*- 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
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