85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/SVGPolygonElement.h"
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#include "mozilla/dom/SVGPolygonElementBinding.h"
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#include "mozilla/gfx/2D.h"
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#include "SVGContentUtils.h"
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using namespace mozilla;
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using namespace mozilla::gfx;
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NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Polygon)
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namespace mozilla {
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namespace dom {
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JSObject*
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SVGPolygonElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return SVGPolygonElementBinding::Wrap(aCx, this, aGivenProto);
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}
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//----------------------------------------------------------------------
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// Implementation
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SVGPolygonElement::SVGPolygonElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: SVGPolygonElementBase(aNodeInfo)
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{
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}
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//----------------------------------------------------------------------
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// nsIDOMNode methods
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NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGPolygonElement)
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//----------------------------------------------------------------------
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// nsSVGPathGeometryElement methods
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void
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SVGPolygonElement::GetMarkPoints(nsTArray<nsSVGMark> *aMarks)
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{
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nsSVGPolyElement::GetMarkPoints(aMarks);
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if (aMarks->IsEmpty() || aMarks->LastElement().type != nsSVGMark::eEnd) {
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return;
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}
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nsSVGMark *endMark = &aMarks->LastElement();
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nsSVGMark *startMark = &aMarks->ElementAt(0);
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float angle = atan2(startMark->y - endMark->y, startMark->x - endMark->x);
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endMark->type = nsSVGMark::eMid;
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endMark->angle = SVGContentUtils::AngleBisect(angle, endMark->angle);
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startMark->angle = SVGContentUtils::AngleBisect(angle, startMark->angle);
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// for a polygon (as opposed to a polyline) there's an implicit extra point
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// co-located with the start point that nsSVGPolyElement::GetMarkPoints
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// doesn't return
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aMarks->AppendElement(nsSVGMark(startMark->x, startMark->y, startMark->angle,
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nsSVGMark::eEnd));
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}
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already_AddRefed<Path>
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SVGPolygonElement::BuildPath(PathBuilder* aBuilder)
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{
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const SVGPointList &points = mPoints.GetAnimValue();
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if (points.IsEmpty()) {
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return nullptr;
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}
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aBuilder->MoveTo(points[0]);
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for (uint32_t i = 1; i < points.Length(); ++i) {
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aBuilder->LineTo(points[i]);
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}
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aBuilder->Close();
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return aBuilder->Finish();
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}
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} // namespace dom
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} // namespace mozilla
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