/* -*- 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_SVGSWITCHELEMENT_H_
#define DOM_SVG_SVGSWITCHELEMENT_H_

#include "mozilla/dom/SVGGraphicsElement.h"
#include "nsCOMPtr.h"

nsresult NS_NewSVGSwitchElement(
    nsIContent** aResult, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);

namespace mozilla {
class ErrorResult;
namespace dom {

using SVGSwitchElementBase = SVGGraphicsElement;

class SVGSwitchElement final : public SVGSwitchElementBase {
 protected:
  friend nsresult(::NS_NewSVGSwitchElement(
      nsIContent** aResult,
      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
  explicit SVGSwitchElement(
      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
  ~SVGSwitchElement() = default;
  JSObject* WrapNode(JSContext* aCx,
                     JS::Handle<JSObject*> aGivenProto) override;

 public:
  NS_IMPL_FROMNODE_WITH_TAG(SVGSwitchElement, kNameSpaceID_SVG, svgSwitch)

  nsIContent* GetActiveChild() const { return mActiveChild; }
  void MaybeInvalidate();

  // interfaces:

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGSwitchElement,
                                           SVGSwitchElementBase)
  // nsINode
  virtual void InsertChildBefore(nsIContent* aKid, nsIContent* aBeforeThis,
                                 bool aNotify, ErrorResult& aRv) override;
  void RemoveChildNode(nsIContent* aKid, bool aNotify) override;

  // nsIContent
  nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;

 private:
  void UpdateActiveChild() { mActiveChild = FindActiveChild(); }
  nsIContent* FindActiveChild() const;

  // only this child will be displayed
  nsCOMPtr<nsIContent> mActiveChild;
};

}  // namespace dom
}  // namespace mozilla

#endif  // DOM_SVG_SVGSWITCHELEMENT_H_