/* -*- 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