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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 "mozilla/dom/SVGPolygonElementBinding.h"
#include "mozilla/gfx/2D.h"
#include "SVGContentUtils.h"
using namespace mozilla;
using namespace mozilla::gfx;
NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Polygon)
namespace mozilla {
namespace dom {
JSObject*
SVGPolygonElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
return SVGPolygonElementBinding::Wrap(aCx, this, aGivenProto);
}
//----------------------------------------------------------------------
// Implementation
SVGPolygonElement::SVGPolygonElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: SVGPolygonElementBase(aNodeInfo)
{
}
//----------------------------------------------------------------------
// nsIDOMNode methods
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGPolygonElement)
//----------------------------------------------------------------------
// nsSVGPathGeometryElement methods
void
SVGPolygonElement::GetMarkPoints(nsTArray<nsSVGMark> *aMarks)
{
nsSVGPolyElement::GetMarkPoints(aMarks);
if (aMarks->IsEmpty() || aMarks->LastElement().type != nsSVGMark::eEnd) {
return;
}
nsSVGMark *endMark = &aMarks->LastElement();
nsSVGMark *startMark = &aMarks->ElementAt(0);
float angle = atan2(startMark->y - endMark->y, startMark->x - endMark->x);
endMark->type = nsSVGMark::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 nsSVGPolyElement::GetMarkPoints
// doesn't return
aMarks->AppendElement(nsSVGMark(startMark->x, startMark->y, startMark->angle,
nsSVGMark::eEnd));
}
already_AddRefed<Path>
SVGPolygonElement::BuildPath(PathBuilder* aBuilder)
{
const SVGPointList &points = mPoints.GetAnimValue();
if (points.IsEmpty()) {
return nullptr;
}
aBuilder->MoveTo(points[0]);
for (uint32_t i = 1; i < points.Length(); ++i) {
aBuilder->LineTo(points[i]);
}
aBuilder->Close();
return aBuilder->Finish();
}
} // namespace dom
} // namespace mozilla
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