/* 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 "SVGPolyElement.h"
#include "DOMSVGPointList.h"
#include "SVGContentUtils.h"
#include "mozilla/dom/SVGAnimatedLength.h"
#include "mozilla/gfx/2D.h"
using namespace mozilla::gfx;
namespace mozilla::dom {
//----------------------------------------------------------------------
// Implementation
SVGPolyElement::SVGPolyElement(
already_AddRefed<mozilla::dom::NodeInfo> aNodeInfo)
: SVGPolyElementBase(std::move(aNodeInfo)) {}
already_AddRefed<DOMSVGPointList> SVGPolyElement::Points() {
return DOMSVGPointList::GetDOMWrapper(mPoints.GetBaseValKey(),
this);
}
already_AddRefed<DOMSVGPointList> SVGPolyElement::AnimatedPoints() {
return DOMSVGPointList::GetDOMWrapper(mPoints.GetAnimValKey(),
this);
}
//----------------------------------------------------------------------
// SVGElement methods
/* virtual */
bool SVGPolyElement::HasValidDimensions()
const {
return !mPoints.GetAnimValue().IsEmpty();
}
//----------------------------------------------------------------------
// SVGGeometryElement methods
bool SVGPolyElement::AttributeDefinesGeometry(
const nsAtom* aName) {
return aName == nsGkAtoms::points || aName == nsGkAtoms::pathLength;
}
void SVGPolyElement::GetMarkPoints(nsTArray<SVGMark>* aMarks) {
const SVGPointList& points = mPoints.GetAnimValue();
if (points.IsEmpty()) {
return;
}
float zoom = UserSpaceMetrics::GetZoom(
this);
Point prevPos = points[
0] * zoom;
float prevAngle =
0.
0f;
if (!prevPos.IsFinite()) {
return;
}
aMarks->AppendElement(SVGMark(prevPos,
0, SVGMark::Type::Start));
for (uint32_t i =
1; i < points.Length(); ++i) {
gfx::Point pos = points[i] * zoom;
if (!pos.IsFinite()) {
aMarks->Clear();
return;
}
float angle = std::atan2(pos.y - prevPos.y, pos.x - prevPos.x);
// Vertex marker.
if (i ==
1) {
aMarks->ElementAt(
0).angle = angle;
}
else {
aMarks->LastElement().angle =
SVGContentUtils::AngleBisect(prevAngle, angle);
}
aMarks->AppendElement(SVGMark(pos,
0, SVGMark::Type::Mid));
prevAngle = angle;
prevPos = pos;
}
aMarks->LastElement().angle = prevAngle;
aMarks->LastElement().type = SVGMark::Type::End;
}
bool SVGPolyElement::GetGeometryBounds(Rect* aBounds,
const StrokeOptions& aStrokeOptions,
const Matrix& aToBoundsSpace,
const Matrix* aToNonScalingStrokeSpace) {
const SVGPointList& points = mPoints.GetAnimValue();
if (points.IsEmpty()) {
// Rendering of the element is disabled
aBounds->SetEmpty();
return true;
}
if (aStrokeOptions.mLineWidth >
0 || aToNonScalingStrokeSpace) {
// We don't handle non-scaling-stroke or stroke-miterlimit etc. yet
return false;
}
float zoom = UserSpaceMetrics::GetZoom(
this);
if (aToBoundsSpace.IsRectilinear()) {
// We can avoid transforming each point and just transform the result.
// Important for large point lists.
Rect bounds(Point(points[
0]) * zoom, Size());
for (uint32_t i =
1; i < points.Length(); ++i) {
bounds.ExpandToEnclose(Point(points[i]) * zoom);
}
*aBounds = aToBoundsSpace.TransformBounds(bounds);
}
else {
*aBounds =
Rect(aToBoundsSpace.TransformPoint(Point(points[
0]) * zoom), Size());
for (uint32_t i =
1; i < points.Length(); ++i) {
aBounds->ExpandToEnclose(
aToBoundsSpace.TransformPoint(Point(points[i]) * zoom));
}
}
return aBounds->IsFinite();
}
}
// namespace mozilla::dom