зеркало из https://github.com/mozilla/gecko-dev.git
194 строки
6.4 KiB
C++
194 строки
6.4 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 "ComputedStyle.h"
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#include "mozilla/dom/SVGEllipseElement.h"
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#include "mozilla/dom/SVGEllipseElementBinding.h"
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#include "mozilla/dom/SVGLengthBinding.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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#include "SVGGeometryProperty.h"
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NS_IMPL_NS_NEW_SVG_ELEMENT(Ellipse)
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using namespace mozilla::gfx;
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namespace mozilla::dom {
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JSObject* SVGEllipseElement::WrapNode(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return SVGEllipseElement_Binding::Wrap(aCx, this, aGivenProto);
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}
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SVGElement::LengthInfo SVGEllipseElement::sLengthInfo[4] = {
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{nsGkAtoms::cx, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
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SVGContentUtils::X},
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{nsGkAtoms::cy, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
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SVGContentUtils::Y},
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{nsGkAtoms::rx, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
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SVGContentUtils::X},
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{nsGkAtoms::ry, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
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SVGContentUtils::Y},
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};
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//----------------------------------------------------------------------
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// Implementation
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SVGEllipseElement::SVGEllipseElement(
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: SVGEllipseElementBase(std::move(aNodeInfo)) {}
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bool SVGEllipseElement::IsAttributeMapped(const nsAtom* aAttribute) const {
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return IsInLengthInfo(aAttribute, sLengthInfo) ||
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SVGEllipseElementBase::IsAttributeMapped(aAttribute);
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}
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namespace SVGT = SVGGeometryProperty::Tags;
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//----------------------------------------------------------------------
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// nsINode 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<DOMSVGAnimatedLength> SVGEllipseElement::Cx() {
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return mLengthAttributes[CX].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGEllipseElement::Cy() {
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return mLengthAttributes[CY].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGEllipseElement::Rx() {
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return mLengthAttributes[RX].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGEllipseElement::Ry() {
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return mLengthAttributes[RY].ToDOMAnimatedLength(this);
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}
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//----------------------------------------------------------------------
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// SVGElement methods
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/* virtual */
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bool SVGEllipseElement::HasValidDimensions() const {
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float rx, ry;
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if (SVGGeometryProperty::ResolveAll<SVGT::Rx, SVGT::Ry>(this, &rx, &ry)) {
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return rx > 0 && ry > 0;
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}
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// This function might be called for an element in display:none subtree
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// (e.g. SMIL animateMotion), we fall back to use SVG attributes.
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bool hasRx = mLengthAttributes[RX].IsExplicitlySet();
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bool hasRy = mLengthAttributes[RY].IsExplicitlySet();
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if ((hasRx && mLengthAttributes[RX].GetAnimValInSpecifiedUnits() <= 0) ||
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(hasRy && mLengthAttributes[RY].GetAnimValInSpecifiedUnits() <= 0)) {
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return false;
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}
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return hasRx || hasRy;
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}
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SVGElement::LengthAttributesInfo SVGEllipseElement::GetLengthInfo() {
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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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// SVGGeometryElement methods
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bool SVGEllipseElement::GetGeometryBounds(
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Rect* aBounds, const StrokeOptions& aStrokeOptions,
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const Matrix& aToBoundsSpace, const Matrix* aToNonScalingStrokeSpace) {
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float x, y, rx, ry;
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DebugOnly<bool> ok =
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SVGGeometryProperty::ResolveAll<SVGT::Cx, SVGT::Cy, SVGT::Rx, SVGT::Ry>(
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this, &x, &y, &rx, &ry);
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MOZ_ASSERT(ok, "SVGGeometryProperty::ResolveAll failed");
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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.TransformPoint(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> SVGEllipseElement::BuildPath(PathBuilder* aBuilder) {
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float x, y, rx, ry;
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if (!SVGGeometryProperty::ResolveAll<SVGT::Cx, SVGT::Cy, SVGT::Rx, SVGT::Ry>(
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this, &x, &y, &rx, &ry)) {
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// This function might be called for element in display:none subtree
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// (e.g. getTotalLength), we fall back to use SVG attributes.
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GetAnimatedLengthValues(&x, &y, &rx, &ry, nullptr);
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}
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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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bool SVGEllipseElement::IsLengthChangedViaCSS(const ComputedStyle& aNewStyle,
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const ComputedStyle& aOldStyle) {
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const auto& newSVGReset = *aNewStyle.StyleSVGReset();
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const auto& oldSVGReset = *aOldStyle.StyleSVGReset();
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return newSVGReset.mCx != oldSVGReset.mCx ||
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newSVGReset.mCy != oldSVGReset.mCy ||
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newSVGReset.mRx != oldSVGReset.mRx ||
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newSVGReset.mRy != oldSVGReset.mRy;
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}
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nsCSSPropertyID SVGEllipseElement::GetCSSPropertyIdForAttrEnum(
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uint8_t aAttrEnum) {
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switch (aAttrEnum) {
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case CX:
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return eCSSProperty_cx;
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case CY:
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return eCSSProperty_cy;
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case RX:
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return eCSSProperty_rx;
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case RY:
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return eCSSProperty_ry;
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default:
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MOZ_ASSERT_UNREACHABLE("Unknown attr enum");
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return eCSSProperty_UNKNOWN;
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}
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}
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} // namespace mozilla::dom
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