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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
#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