gecko-dev/dom/svg/SVGPolygonElement.h
Boris Chiou f8aab94d5f Bug 1598158 - Add IsClosedLoop() for SVGGeometryElement. r=emilio
Per https://drafts.fxtf.org/motion/#path-distance, we follow these rules
when `offset-path` references to a SVG shape:

1. Offset paths (including references to SVG Paths) are closed loops only if
   the final command in the path list is a closepath command ("z" or "Z"),
   otherwise they are unclosed intervals.
2. References to SVG circles, ellipses, images, polygons and rects are closed
   loops.
3. References to SVG lines and polylines are unclosed intervals.

Also, rename `mIsClosedIntervals` as `mIsClosedLoop` to be consistent.

Differential Revision: https://phabricator.services.mozilla.com/D184430
2023-08-07 22:04:02 +00:00

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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/. */
#ifndef DOM_SVG_SVGPOLYGONELEMENT_H_
#define DOM_SVG_SVGPOLYGONELEMENT_H_
#include "mozilla/Attributes.h"
#include "SVGPolyElement.h"
nsresult NS_NewSVGPolygonElement(
nsIContent** aResult, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
namespace mozilla::dom {
using SVGPolygonElementBase = SVGPolyElement;
class SVGPolygonElement final : public SVGPolygonElementBase {
protected:
explicit SVGPolygonElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
JSObject* WrapNode(JSContext* cx, JS::Handle<JSObject*> aGivenProto) override;
friend nsresult(::NS_NewSVGPolygonElement(
nsIContent** aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
public:
// SVGGeometryElement methods:
void GetMarkPoints(nsTArray<SVGMark>* aMarks) override;
already_AddRefed<Path> BuildPath(PathBuilder* aBuilder) override;
bool IsClosedLoop() const override { return true; }
nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
};
} // namespace mozilla::dom
#endif // DOM_SVG_SVGPOLYGONELEMENT_H_