layout/xul/nsStackLayout.h
author L. David Baron <dbaron@dbaron.org>
Wed, 20 Apr 2016 21:28:31 -0700
changeset 334073 e84de27f354c29195e950f42d6c87649691281a2
parent 334072 0e8929a206ca948d21bb7f222fb8709dbe8d66f7
child 334080 0f17a800a22ee47486b4687e9ae482fe413ac6d4
permissions -rw-r--r--
Bug 1053986 - Rename nsIFrame::GetMaxSize to GetXULMaxSize, and related methods. r=dholbert Written purely with sed, over .h and .cpp files in layout/. MozReview-Commit-ID: 39fYXMz7kqR

/* -*- 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 Layout(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