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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/. */
//
// Eric Vaughan
// Netscape Communications
//
// See documentation in associated header file
//
#include "nsStackFrame.h"
#include "nsStyleContext.h"
#include "nsIContent.h"
#include "nsCOMPtr.h"
#include "nsHTMLParts.h"
#include "nsIPresShell.h"
#include "nsCSSRendering.h"
#include "nsBoxLayoutState.h"
#include "nsStackLayout.h"
#include "nsDisplayList.h"
nsIFrame*
NS_NewStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsStackFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsStackFrame)
nsStackFrame::nsStackFrame(nsStyleContext* aContext):
nsBoxFrame(aContext)
{
nsCOMPtr<nsBoxLayout> layout;
NS_NewStackLayout(layout);
SetXULLayoutManager(layout);
}
// REVIEW: The old code put everything in the background layer. To be more
// consistent with the way other frames work, I'm putting everything in the
// Content() (i.e., foreground) layer (see nsFrame::BuildDisplayListForChild,
// the case for stacking context but non-positioned, non-floating frames).
// This could easily be changed back by hacking nsBoxFrame::BuildDisplayListInternal
// a bit more.
void
nsStackFrame::BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
// BuildDisplayListForChild puts stacking contexts into the PositionedDescendants
// list. So we need to map that list to aLists.Content(). This is an easy way to
// do that.
nsDisplayList* content = aLists.Content();
nsDisplayListSet kidLists(content, content, content, content, content, content);
nsIFrame* kid = mFrames.FirstChild();
while (kid) {
// Force each child into its own true stacking context.
BuildDisplayListForChild(aBuilder, kid, aDirtyRect, kidLists,
DISPLAY_CHILD_FORCE_STACKING_CONTEXT);
kid = kid->GetNextSibling();
}
}
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