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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "mozilla/dom/SVGRectElement.h"
#include "nsGkAtoms.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 <algorithm>
NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Rect)
using namespace mozilla::gfx;
namespace mozilla {
namespace dom {
class SVGAnimatedLength;
JSObject*
SVGRectElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
return SVGRectElementBinding::Wrap(aCx, this, aGivenProto);
}
nsSVGElement::LengthInfo SVGRectElement::sLengthInfo[6] =
{
{ &nsGkAtoms::x, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
{ &nsGkAtoms::y, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
{ &nsGkAtoms::width, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
{ &nsGkAtoms::height, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
{ &nsGkAtoms::rx, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
{ &nsGkAtoms::ry, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y }
};
//----------------------------------------------------------------------
// Implementation
SVGRectElement::SVGRectElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: SVGRectElementBase(aNodeInfo)
{
}
//----------------------------------------------------------------------
// nsIDOMNode methods
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGRectElement)
//----------------------------------------------------------------------
already_AddRefed<SVGAnimatedLength>
SVGRectElement::X()
{
return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGRectElement::Y()
{
return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGRectElement::Width()
{
return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGRectElement::Height()
{
return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGRectElement::Rx()
{
return mLengthAttributes[ATTR_RX].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGRectElement::Ry()
{
return mLengthAttributes[ATTR_RY].ToDOMAnimatedLength(this);
}
//----------------------------------------------------------------------
// nsSVGElement methods
/* virtual */ bool
SVGRectElement::HasValidDimensions() const
{
return mLengthAttributes[ATTR_WIDTH].IsExplicitlySet() &&
mLengthAttributes[ATTR_WIDTH].GetAnimValInSpecifiedUnits() > 0 &&
mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet() &&
mLengthAttributes[ATTR_HEIGHT].GetAnimValInSpecifiedUnits() > 0;
}
nsSVGElement::LengthAttributesInfo
SVGRectElement::GetLengthInfo()
{
return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
ArrayLength(sLengthInfo));
}
//----------------------------------------------------------------------
// nsSVGPathGeometryElement methods
bool
SVGRectElement::GetGeometryBounds(Rect* aBounds,
const StrokeOptions& aStrokeOptions,
const Matrix& aToBoundsSpace,
const Matrix* aToNonScalingStrokeSpace)
{
Rect rect;
Float rx, ry;
GetAnimatedLengthValues(&rect.x, &rect.y, &rect.width,
&rect.height, &rx, &ry, nullptr);
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;
GetAnimatedLengthValues(&x, &y, &width, &height, &rx, &ry, nullptr);
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;
GetAnimatedLengthValues(&x, &y, &width, &height, &rx, &ry, nullptr);
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 {
// 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();
MOZ_ASSERT(hasRx || hasRy);
if (hasRx && !hasRy) {
ry = rx;
} else if (hasRy && !hasRx) {
rx = ry;
}
// 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();
}
} // namespace dom
} // namespace mozilla
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