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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 "SVGPolyElement.h"
#include "DOMSVGPointList.h"
#include "mozilla/gfx/2D.h"
#include "SVGContentUtils.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace dom {
//----------------------------------------------------------------------
// Implementation
SVGPolyElement::SVGPolyElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: SVGPolyElementBase(std::move(aNodeInfo)) {}
already_AddRefed<DOMSVGPointList> SVGPolyElement::Points() {
void* key = mPoints.GetBaseValKey();
RefPtr<DOMSVGPointList> points =
DOMSVGPointList::GetDOMWrapper(key, this, false);
return points.forget();
}
already_AddRefed<DOMSVGPointList> SVGPolyElement::AnimatedPoints() {
void* key = mPoints.GetAnimValKey();
RefPtr<DOMSVGPointList> points =
DOMSVGPointList::GetDOMWrapper(key, this, true);
return points.forget();
}
//----------------------------------------------------------------------
// nsIContent methods
NS_IMETHODIMP_(bool)
SVGPolyElement::IsAttributeMapped(const nsAtom* name) const {
static const MappedAttributeEntry* const map[] = {sMarkersMap};
return FindAttributeDependence(name, map) ||
SVGPolyElementBase::IsAttributeMapped(name);
}
//----------------------------------------------------------------------
// SVGElement methods
/* virtual */
bool SVGPolyElement::HasValidDimensions() const {
return !mPoints.GetAnimValue().IsEmpty();
}
//----------------------------------------------------------------------
// SVGGeometryElement methods
bool SVGPolyElement::AttributeDefinesGeometry(const nsAtom* aName) {
return aName == nsGkAtoms::points;
}
void SVGPolyElement::GetMarkPoints(nsTArray<SVGMark>* aMarks) {
const SVGPointList& points = mPoints.GetAnimValue();
if (!points.Length()) return;
float px = points[0].mX, py = points[0].mY, prevAngle = 0.0;
aMarks->AppendElement(SVGMark(px, py, 0, SVGMark::eStart));
for (uint32_t i = 1; i < points.Length(); ++i) {
float x = points[i].mX;
float y = points[i].mY;
float angle = std::atan2(y - py, x - px);
// Vertex marker.
if (i == 1) {
aMarks->ElementAt(0).angle = angle;
} else {
aMarks->ElementAt(aMarks->Length() - 1).angle =
SVGContentUtils::AngleBisect(prevAngle, angle);
}
aMarks->AppendElement(SVGMark(x, y, 0, SVGMark::eMid));
prevAngle = angle;
px = x;
py = y;
}
aMarks->LastElement().angle = prevAngle;
aMarks->LastElement().type = SVGMark::eEnd;
}
bool SVGPolyElement::GetGeometryBounds(Rect* aBounds,
const StrokeOptions& aStrokeOptions,
const Matrix& aToBoundsSpace,
const Matrix* aToNonScalingStrokeSpace) {
const SVGPointList& points = mPoints.GetAnimValue();
if (!points.Length()) {
// 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;
}
if (aToBoundsSpace.IsRectilinear()) {
// We can avoid transforming each point and just transform the result.
// Important for large point lists.
Rect bounds(points[0], Size());
for (uint32_t i = 1; i < points.Length(); ++i) {
bounds.ExpandToEnclose(points[i]);
}
*aBounds = aToBoundsSpace.TransformBounds(bounds);
} else {
*aBounds = Rect(aToBoundsSpace.TransformPoint(points[0]), Size());
for (uint32_t i = 1; i < points.Length(); ++i) {
aBounds->ExpandToEnclose(aToBoundsSpace.TransformPoint(points[i]));
}
}
return true;
}
} // namespace dom
} // namespace mozilla
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