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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/SVGPolygonElement.h"
#include "SVGContentUtils.h"
#include "mozilla/dom/SVGAnimatedLength.h"
#include "mozilla/dom/SVGPolygonElementBinding.h"
#include "mozilla/gfx/2D.h"
using namespace mozilla::gfx;
NS_IMPL_NS_NEW_SVG_ELEMENT(Polygon)
namespace mozilla::dom {
JSObject* SVGPolygonElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGPolygonElement_Binding::Wrap(aCx, this, aGivenProto);
}
//----------------------------------------------------------------------
// Implementation
SVGPolygonElement::SVGPolygonElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: SVGPolygonElementBase(std::move(aNodeInfo)) {}
//----------------------------------------------------------------------
// nsINode methods
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGPolygonElement)
//----------------------------------------------------------------------
// SVGGeometryElement methods
void SVGPolygonElement::GetMarkPoints(nsTArray<SVGMark>* aMarks) {
SVGPolyElement::GetMarkPoints(aMarks);
if (aMarks->IsEmpty() || aMarks->LastElement().type != SVGMark::eEnd) {
return;
}
SVGMark* endMark = &aMarks->LastElement();
SVGMark* startMark = &aMarks->ElementAt(0);
float angle =
std::atan2(startMark->y - endMark->y, startMark->x - endMark->x);
endMark->type = SVGMark::eMid;
endMark->angle = SVGContentUtils::AngleBisect(angle, endMark->angle);
startMark->angle = SVGContentUtils::AngleBisect(angle, startMark->angle);
// for a polygon (as opposed to a polyline) there's an implicit extra point
// co-located with the start point that SVGPolyElement::GetMarkPoints
// doesn't return
aMarks->AppendElement(
SVGMark(startMark->x, startMark->y, startMark->angle, SVGMark::eEnd));
}
already_AddRefed<Path> SVGPolygonElement::BuildPath(PathBuilder* aBuilder) {
const SVGPointList& points = mPoints.GetAnimValue();
if (points.IsEmpty()) {
return nullptr;
}
float zoom = UserSpaceMetrics::GetZoom(this);
Point zoomedPoint = Point(points[0]) * zoom;
if (!zoomedPoint.IsFinite()) {
return nullptr;
}
aBuilder->MoveTo(zoomedPoint);
for (uint32_t i = 1; i < points.Length(); ++i) {
zoomedPoint = Point(points[i]) * zoom;
if (!zoomedPoint.IsFinite()) {
return nullptr;
}
aBuilder->LineTo(zoomedPoint);
}
aBuilder->Close();
return aBuilder->Finish();
}
} // namespace mozilla::dom
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