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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 nsStackLayout_h___
#define nsStackLayout_h___
#include "mozilla/Attributes.h"
#include "nsBoxLayout.h"
#include "nsCOMPtr.h"
#include "nsCoord.h"
class nsIPresShell;
nsresult NS_NewStackLayout(nsCOMPtr<nsBoxLayout>& aNewLayout);
class nsStackLayout : public nsBoxLayout
{
public:
friend nsresult NS_NewStackLayout(nsCOMPtr<nsBoxLayout>& aNewLayout);
static void Shutdown();
nsStackLayout();
NS_IMETHOD XULLayout(nsIFrame* aBox, nsBoxLayoutState& aState) override;
virtual nsSize GetXULPrefSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetXULMinSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetXULMaxSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
virtual nscoord GetAscent(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
// get the child offsets for aChild and set them in aMargin. Returns a
// bitfield mask of the SPECIFIED_LEFT, SPECIFIED_RIGHT, SPECIFIED_TOP and
// SPECIFIED_BOTTOM offsets indicating which sides have been specified by
// attributes.
static uint8_t GetOffset(nsIFrame* aChild, nsMargin& aMargin);
private:
static nsBoxLayout* gInstance;
}; // class nsStackLayout
#endif
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