117 lines
3.6 KiB
C++
117 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "SVGPolyElement.h"
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#include "DOMSVGPointList.h"
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#include "mozilla/dom/SVGAnimatedLength.h"
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#include "mozilla/gfx/2D.h"
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#include "SVGContentUtils.h"
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using namespace mozilla::gfx;
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namespace mozilla::dom {
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//----------------------------------------------------------------------
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// Implementation
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SVGPolyElement::SVGPolyElement(
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: SVGPolyElementBase(std::move(aNodeInfo)) {}
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already_AddRefed<DOMSVGPointList> SVGPolyElement::Points() {
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return DOMSVGPointList::GetDOMWrapper(mPoints.GetBaseValKey(), this);
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}
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already_AddRefed<DOMSVGPointList> SVGPolyElement::AnimatedPoints() {
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return DOMSVGPointList::GetDOMWrapper(mPoints.GetAnimValKey(), this);
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}
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//----------------------------------------------------------------------
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// SVGElement methods
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/* virtual */
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bool SVGPolyElement::HasValidDimensions() const {
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return !mPoints.GetAnimValue().IsEmpty();
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}
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//----------------------------------------------------------------------
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// SVGGeometryElement methods
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bool SVGPolyElement::AttributeDefinesGeometry(const nsAtom* aName) {
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return aName == nsGkAtoms::points || aName == nsGkAtoms::pathLength;
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}
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void SVGPolyElement::GetMarkPoints(nsTArray<SVGMark>* aMarks) {
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const SVGPointList& points = mPoints.GetAnimValue();
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if (!points.Length()) return;
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float zoom = UserSpaceMetrics::GetZoom(this);
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float px = points[0].mX * zoom, py = points[0].mY * zoom, prevAngle = 0.0;
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aMarks->AppendElement(SVGMark(px, py, 0, SVGMark::eStart));
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for (uint32_t i = 1; i < points.Length(); ++i) {
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float x = points[i].mX * zoom;
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float y = points[i].mY * zoom;
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float angle = std::atan2(y - py, x - px);
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// Vertex marker.
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if (i == 1) {
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aMarks->ElementAt(0).angle = angle;
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} else {
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aMarks->LastElement().angle =
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SVGContentUtils::AngleBisect(prevAngle, angle);
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}
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aMarks->AppendElement(SVGMark(x, y, 0, SVGMark::eMid));
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prevAngle = angle;
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px = x;
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py = y;
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}
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aMarks->LastElement().angle = prevAngle;
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aMarks->LastElement().type = SVGMark::eEnd;
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}
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bool SVGPolyElement::GetGeometryBounds(Rect* aBounds,
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const StrokeOptions& aStrokeOptions,
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const Matrix& aToBoundsSpace,
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const Matrix* aToNonScalingStrokeSpace) {
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const SVGPointList& points = mPoints.GetAnimValue();
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if (!points.Length()) {
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// Rendering of the element is disabled
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aBounds->SetEmpty();
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return true;
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}
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if (aStrokeOptions.mLineWidth > 0 || aToNonScalingStrokeSpace) {
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// We don't handle non-scaling-stroke or stroke-miterlimit etc. yet
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return false;
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}
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float zoom = UserSpaceMetrics::GetZoom(this);
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if (aToBoundsSpace.IsRectilinear()) {
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// We can avoid transforming each point and just transform the result.
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// Important for large point lists.
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Rect bounds(points[0] * zoom, Size());
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for (uint32_t i = 1; i < points.Length(); ++i) {
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bounds.ExpandToEnclose(points[i] * zoom);
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}
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*aBounds = aToBoundsSpace.TransformBounds(bounds);
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} else {
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*aBounds = Rect(aToBoundsSpace.TransformPoint(points[0] * zoom), Size());
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for (uint32_t i = 1; i < points.Length(); ++i) {
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aBounds->ExpandToEnclose(aToBoundsSpace.TransformPoint(points[i] * zoom));
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}
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}
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return true;
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}
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} // namespace mozilla::dom
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