michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0: 
michael@0:   Eric D Vaughan
michael@0:   A frame that can have multiple children. Only one child may be displayed at one time. So the
michael@0:   can be flipped though like a deck of cards.
michael@0:  
michael@0: **/
michael@0: 
michael@0: #ifndef nsStackLayout_h___
michael@0: #define nsStackLayout_h___
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsBoxLayout.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsCoord.h"
michael@0: 
michael@0: class nsIPresShell;
michael@0: 
michael@0: nsresult NS_NewStackLayout(nsIPresShell* aPresShell, nsCOMPtr<nsBoxLayout>& aNewLayout);
michael@0: 
michael@0: class nsStackLayout : public nsBoxLayout
michael@0: {
michael@0: public:
michael@0: 
michael@0:   friend nsresult NS_NewStackLayout(nsIPresShell* aPresShell, nsCOMPtr<nsBoxLayout>& aNewLayout);
michael@0:   static void Shutdown();
michael@0: 
michael@0:   nsStackLayout();
michael@0: 
michael@0:   NS_IMETHOD Layout(nsIFrame* aBox, nsBoxLayoutState& aState) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsSize GetPrefSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0:   virtual nsSize GetMinSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0:   virtual nsSize GetMaxSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0:   virtual nscoord GetAscent(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0: 
michael@0:   // get the child offsets for aChild and set them in aMargin. Returns a
michael@0:   // bitfield mask of the SPECIFIED_LEFT, SPECIFIED_RIGHT, SPECIFIED_TOP and
michael@0:   // SPECIFIED_BOTTOM offsets indicating which sides have been specified by
michael@0:   // attributes.
michael@0:   static uint8_t GetOffset(nsBoxLayoutState& aState, nsIFrame* aChild, nsMargin& aMargin);
michael@0: 
michael@0: private:
michael@0:   static nsBoxLayout* gInstance;
michael@0: 
michael@0: }; // class nsStackLayout
michael@0: 
michael@0: 
michael@0: 
michael@0: #endif
michael@0: