57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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/**
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Eric D Vaughan
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A frame that can have multiple children. Only one child may be displayed at one time. So the
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can be flipped though like a deck of cards.
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**/
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#ifndef nsStackLayout_h___
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#define nsStackLayout_h___
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#include "mozilla/Attributes.h"
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#include "nsBoxLayout.h"
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#include "nsCOMPtr.h"
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#include "nsCoord.h"
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class nsIPresShell;
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nsresult NS_NewStackLayout(nsCOMPtr<nsBoxLayout>& aNewLayout);
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class nsStackLayout : public nsBoxLayout
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{
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public:
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friend nsresult NS_NewStackLayout(nsCOMPtr<nsBoxLayout>& aNewLayout);
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static void Shutdown();
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nsStackLayout();
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NS_IMETHOD XULLayout(nsIFrame* aBox, nsBoxLayoutState& aState) override;
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virtual nsSize GetXULPrefSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMinSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMaxSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
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virtual nscoord GetAscent(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) override;
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// get the child offsets for aChild and set them in aMargin. Returns a
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// bitfield mask of the SPECIFIED_LEFT, SPECIFIED_RIGHT, SPECIFIED_TOP and
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// SPECIFIED_BOTTOM offsets indicating which sides have been specified by
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// attributes.
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static uint8_t GetOffset(nsIFrame* aChild, nsMargin& aMargin);
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private:
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static nsBoxLayout* gInstance;
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}; // class nsStackLayout
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#endif
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