The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/layout/xul/nsStackFrame.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,63 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +//
    1.10 +// Eric Vaughan
    1.11 +// Netscape Communications
    1.12 +//
    1.13 +// See documentation in associated header file
    1.14 +//
    1.15 +
    1.16 +#include "nsStackFrame.h"
    1.17 +#include "nsStyleContext.h"
    1.18 +#include "nsIContent.h"
    1.19 +#include "nsCOMPtr.h"
    1.20 +#include "nsHTMLParts.h"
    1.21 +#include "nsIPresShell.h"
    1.22 +#include "nsCSSRendering.h"
    1.23 +#include "nsBoxLayoutState.h"
    1.24 +#include "nsStackLayout.h"
    1.25 +#include "nsDisplayList.h"
    1.26 +
    1.27 +nsIFrame*
    1.28 +NS_NewStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
    1.29 +{
    1.30 +  return new (aPresShell) nsStackFrame(aPresShell, aContext);
    1.31 +}
    1.32 +
    1.33 +NS_IMPL_FRAMEARENA_HELPERS(nsStackFrame)
    1.34 +
    1.35 +nsStackFrame::nsStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext):
    1.36 +  nsBoxFrame(aPresShell, aContext)
    1.37 +{
    1.38 +  nsCOMPtr<nsBoxLayout> layout;
    1.39 +  NS_NewStackLayout(aPresShell, layout);
    1.40 +  SetLayoutManager(layout);
    1.41 +}
    1.42 +
    1.43 +// REVIEW: The old code put everything in the background layer. To be more
    1.44 +// consistent with the way other frames work, I'm putting everything in the
    1.45 +// Content() (i.e., foreground) layer (see nsFrame::BuildDisplayListForChild,
    1.46 +// the case for stacking context but non-positioned, non-floating frames).
    1.47 +// This could easily be changed back by hacking nsBoxFrame::BuildDisplayListInternal
    1.48 +// a bit more.
    1.49 +void
    1.50 +nsStackFrame::BuildDisplayListForChildren(nsDisplayListBuilder*   aBuilder,
    1.51 +                                          const nsRect&           aDirtyRect,
    1.52 +                                          const nsDisplayListSet& aLists)
    1.53 +{
    1.54 +  // BuildDisplayListForChild puts stacking contexts into the PositionedDescendants
    1.55 +  // list. So we need to map that list to aLists.Content(). This is an easy way to
    1.56 +  // do that.
    1.57 +  nsDisplayList* content = aLists.Content();
    1.58 +  nsDisplayListSet kidLists(content, content, content, content, content, content);
    1.59 +  nsIFrame* kid = mFrames.FirstChild();
    1.60 +  while (kid) {
    1.61 +    // Force each child into its own true stacking context.
    1.62 +    BuildDisplayListForChild(aBuilder, kid, aDirtyRect, kidLists,
    1.63 +                             DISPLAY_CHILD_FORCE_STACKING_CONTEXT);
    1.64 +    kid = kid->GetNextSibling();
    1.65 +  }
    1.66 +}