зеркало из https://github.com/mozilla/gecko-dev.git
281 строка
9.5 KiB
C++
281 строка
9.5 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 "mozilla/dom/SVGRectElement.h"
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#include "mozilla/dom/SVGLengthBinding.h"
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#include "mozilla/dom/SVGRectElementBinding.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Matrix.h"
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#include "mozilla/gfx/Rect.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "nsGkAtoms.h"
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#include "SVGGeometryProperty.h"
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#include <algorithm>
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NS_IMPL_NS_NEW_SVG_ELEMENT(Rect)
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using namespace mozilla::gfx;
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namespace mozilla::dom {
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class DOMSVGAnimatedLength;
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JSObject* SVGRectElement::WrapNode(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return SVGRectElement_Binding::Wrap(aCx, this, aGivenProto);
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}
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SVGElement::LengthInfo SVGRectElement::sLengthInfo[6] = {
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{nsGkAtoms::x, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
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SVGContentUtils::X},
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{nsGkAtoms::y, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
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SVGContentUtils::Y},
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{nsGkAtoms::width, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
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SVGContentUtils::X},
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{nsGkAtoms::height, 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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// Implementation
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SVGRectElement::SVGRectElement(
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: SVGRectElementBase(std::move(aNodeInfo)) {}
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bool SVGRectElement::IsAttributeMapped(const nsAtom* aAttribute) const {
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return IsInLengthInfo(aAttribute, sLengthInfo) ||
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SVGRectElementBase::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(SVGRectElement)
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//----------------------------------------------------------------------
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already_AddRefed<DOMSVGAnimatedLength> SVGRectElement::X() {
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return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGRectElement::Y() {
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return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGRectElement::Width() {
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return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGRectElement::Height() {
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return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGRectElement::Rx() {
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return mLengthAttributes[ATTR_RX].ToDOMAnimatedLength(this);
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}
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already_AddRefed<DOMSVGAnimatedLength> SVGRectElement::Ry() {
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return mLengthAttributes[ATTR_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 SVGRectElement::HasValidDimensions() const {
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float width, height;
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if (SVGGeometryProperty::ResolveAll<SVGT::Width, SVGT::Height>(this, &width,
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&height)) {
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return width > 0 && height > 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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return mLengthAttributes[ATTR_WIDTH].IsExplicitlySet() &&
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mLengthAttributes[ATTR_WIDTH].GetAnimValInSpecifiedUnits() > 0 &&
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mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet() &&
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mLengthAttributes[ATTR_HEIGHT].GetAnimValInSpecifiedUnits() > 0;
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}
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SVGElement::LengthAttributesInfo SVGRectElement::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 SVGRectElement::GetGeometryBounds(Rect* aBounds,
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const StrokeOptions& aStrokeOptions,
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const Matrix& aToBoundsSpace,
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const Matrix* aToNonScalingStrokeSpace) {
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Rect rect;
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Float rx, ry;
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DebugOnly<bool> ok =
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SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width,
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SVGT::Height, SVGT::Rx, SVGT::Ry>(
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this, &rect.x, &rect.y, &rect.width, &rect.height, &rx, &ry);
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MOZ_ASSERT(ok, "SVGGeometryProperty::ResolveAll failed");
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if (rect.IsEmpty()) {
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// Rendering of the element disabled
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rect.SetEmpty(); // Make sure width/height are zero and not negative
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// We still want the x/y position from 'rect'
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*aBounds = aToBoundsSpace.TransformBounds(rect);
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return true;
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}
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if (!aToBoundsSpace.IsRectilinear()) {
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// We can't ignore the radii in this case if we want tight bounds
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rx = std::max(rx, 0.0f);
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ry = std::max(ry, 0.0f);
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if (rx != 0 || ry != 0) {
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return false;
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}
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}
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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 = aToNonScalingStrokeSpace->TransformBounds(rect);
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// Note that, in principle, an author could cause the corners of the
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// rect to be beveled by specifying stroke-linejoin or setting
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// stroke-miterlimit to be less than sqrt(2). In that very unlikely
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// event the bounds that we calculate here may be too big if
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// aToBoundsSpace is non-rectilinear. This is likely to be so rare it's
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// not worth handling though.
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rect.Inflate(aStrokeOptions.mLineWidth / 2.f);
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Matrix nonScalingToBounds =
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aToNonScalingStrokeSpace->Inverse() * aToBoundsSpace;
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*aBounds = nonScalingToBounds.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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// The "beveled" comment above applies here too
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rect.Inflate(aStrokeOptions.mLineWidth / 2.f);
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}
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*aBounds = aToBoundsSpace.TransformBounds(rect);
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return true;
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}
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void SVGRectElement::GetAsSimplePath(SimplePath* aSimplePath) {
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float x, y, width, height, rx, ry;
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DebugOnly<bool> ok =
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SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width,
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SVGT::Height, SVGT::Rx, SVGT::Ry>(
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this, &x, &y, &width, &height, &rx, &ry);
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MOZ_ASSERT(ok, "SVGGeometryProperty::ResolveAll failed");
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if (width <= 0 || height <= 0) {
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aSimplePath->Reset();
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return;
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}
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rx = std::max(rx, 0.0f);
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ry = std::max(ry, 0.0f);
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if (rx != 0 || ry != 0) {
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aSimplePath->Reset();
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return;
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}
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aSimplePath->SetRect(x, y, width, height);
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}
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already_AddRefed<Path> SVGRectElement::BuildPath(PathBuilder* aBuilder) {
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float x, y, width, height, rx, ry;
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if (!SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width,
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SVGT::Height, SVGT::Rx, SVGT::Ry>(
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this, &x, &y, &width, &height, &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, &width, &height, &rx, &ry, nullptr);
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// If either the 'rx' or the 'ry' attribute isn't set, then we have to
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// set it to the value of the other:
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bool hasRx = mLengthAttributes[ATTR_RX].IsExplicitlySet();
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bool hasRy = mLengthAttributes[ATTR_RY].IsExplicitlySet();
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if (hasRx && !hasRy) {
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ry = rx;
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} else if (hasRy && !hasRx) {
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rx = ry;
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}
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}
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if (width <= 0 || height <= 0) {
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return nullptr;
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}
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rx = std::max(rx, 0.0f);
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ry = std::max(ry, 0.0f);
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if (rx == 0 && ry == 0) {
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// Optimization for the no rounded corners case.
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Rect r(x, y, width, height);
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aBuilder->MoveTo(r.TopLeft());
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aBuilder->LineTo(r.TopRight());
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aBuilder->LineTo(r.BottomRight());
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aBuilder->LineTo(r.BottomLeft());
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aBuilder->Close();
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} else {
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// Clamp rx and ry to half the rect's width and height respectively:
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rx = std::min(rx, width / 2);
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ry = std::min(ry, height / 2);
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RectCornerRadii radii(rx, ry);
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AppendRoundedRectToPath(aBuilder, Rect(x, y, width, height), radii);
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}
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return aBuilder->Finish();
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}
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bool SVGRectElement::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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const auto& newPosition = *aNewStyle.StylePosition();
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const auto& oldPosition = *aOldStyle.StylePosition();
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return newSVGReset.mX != oldSVGReset.mX || newSVGReset.mY != oldSVGReset.mY ||
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newPosition.mWidth != oldPosition.mWidth ||
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newPosition.mHeight != oldPosition.mHeight ||
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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 SVGRectElement::GetCSSPropertyIdForAttrEnum(uint8_t aAttrEnum) {
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switch (aAttrEnum) {
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case ATTR_X:
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return eCSSProperty_x;
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case ATTR_Y:
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return eCSSProperty_y;
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case ATTR_WIDTH:
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return eCSSProperty_width;
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case ATTR_HEIGHT:
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return eCSSProperty_height;
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case ATTR_RX:
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return eCSSProperty_rx;
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case ATTR_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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