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