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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/. */
/*
* rendering object that is the root of the frame tree, which contains
* the document's scrollbars and contains fixed-positioned elements
*/
#ifndef nsViewportFrame_h___
#define nsViewportFrame_h___
#include "mozilla/Attributes.h"
#include "nsContainerFrame.h"
#include "nsGkAtoms.h"
class nsPresContext;
/**
* ViewportFrame is the parent of a single child - the doc root frame or a scroll frame
* containing the doc root frame. ViewportFrame stores this child in its primary child
* list.
*/
class ViewportFrame : public nsContainerFrame {
public:
NS_DECL_FRAMEARENA_HELPERS
typedef nsContainerFrame Super;
ViewportFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext)
{}
virtual ~ViewportFrame() { } // useful for debugging
NS_IMETHOD Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* asPrevInFlow) MOZ_OVERRIDE;
NS_IMETHOD SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) MOZ_OVERRIDE;
NS_IMETHOD AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) MOZ_OVERRIDE;
NS_IMETHOD InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) MOZ_OVERRIDE;
NS_IMETHOD RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) MOZ_OVERRIDE;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus) MOZ_OVERRIDE;
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::viewportFrame
*/
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
#endif
private:
virtual mozilla::layout::FrameChildListID GetAbsoluteListID() const { return kFixedList; }
protected:
nsPoint AdjustReflowStateForScrollbars(nsHTMLReflowState* aReflowState) const;
};
#endif // nsViewportFrame_h___
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