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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/. */

/**

  Eric D Vaughan
  A frame that can have multiple children. Only one child may be displayed at one time. So the
  can be flipped though like a deck of cards.

**/

#ifndef nsDeckFrame_h___
#define nsDeckFrame_h___

#include "mozilla/Attributes.h"
#include "nsBoxFrame.h"

class nsDeckFrame final : public nsBoxFrame
{
public:
  NS_DECL_QUERYFRAME
  NS_DECL_FRAMEARENA_HELPERS(nsDeckFrame)

  friend nsIFrame* NS_NewDeckFrame(nsIPresShell* aPresShell,
                                   ComputedStyle* aStyle);

  virtual nsresult AttributeChanged(int32_t         aNameSpaceID,
                                    nsAtom*        aAttribute,
                                    int32_t         aModType) override;

  NS_IMETHOD DoXULLayout(nsBoxLayoutState& aState) override;

  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsDisplayListSet& aLists) override;

  virtual void RemoveFrame(ChildListID aListID,
                           nsIFrame* aOldFrame) override;

  virtual void BuildDisplayListForChildren(nsDisplayListBuilder*   aBuilder,
                                           const nsDisplayListSet& aLists) override;

  virtual void Init(nsIContent*       aContent,
                    nsContainerFrame* aParent,
                    nsIFrame*         aPrevInFlow) override;

#ifdef DEBUG_FRAME_DUMP
  virtual nsresult GetFrameName(nsAString& aResult) const override
  {
      return MakeFrameName(NS_LITERAL_STRING("Deck"), aResult);
  }
#endif

  explicit nsDeckFrame(ComputedStyle* aStyle);

  nsIFrame* GetSelectedBox();

protected:

  void IndexChanged();
  int32_t GetSelectedIndex();
  void HideBox(nsIFrame* aBox);

private:

  int32_t mIndex;

}; // class nsDeckFrame

#endif