michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //
michael@0: // Eric Vaughan
michael@0: // Netscape Communications
michael@0: //
michael@0: // See documentation in associated header file
michael@0: //
michael@0: 
michael@0: #include "nsStackFrame.h"
michael@0: #include "nsStyleContext.h"
michael@0: #include "nsIContent.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsHTMLParts.h"
michael@0: #include "nsIPresShell.h"
michael@0: #include "nsCSSRendering.h"
michael@0: #include "nsBoxLayoutState.h"
michael@0: #include "nsStackLayout.h"
michael@0: #include "nsDisplayList.h"
michael@0: 
michael@0: nsIFrame*
michael@0: NS_NewStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
michael@0: {
michael@0:   return new (aPresShell) nsStackFrame(aPresShell, aContext);
michael@0: }
michael@0: 
michael@0: NS_IMPL_FRAMEARENA_HELPERS(nsStackFrame)
michael@0: 
michael@0: nsStackFrame::nsStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext):
michael@0:   nsBoxFrame(aPresShell, aContext)
michael@0: {
michael@0:   nsCOMPtr<nsBoxLayout> layout;
michael@0:   NS_NewStackLayout(aPresShell, layout);
michael@0:   SetLayoutManager(layout);
michael@0: }
michael@0: 
michael@0: // REVIEW: The old code put everything in the background layer. To be more
michael@0: // consistent with the way other frames work, I'm putting everything in the
michael@0: // Content() (i.e., foreground) layer (see nsFrame::BuildDisplayListForChild,
michael@0: // the case for stacking context but non-positioned, non-floating frames).
michael@0: // This could easily be changed back by hacking nsBoxFrame::BuildDisplayListInternal
michael@0: // a bit more.
michael@0: void
michael@0: nsStackFrame::BuildDisplayListForChildren(nsDisplayListBuilder*   aBuilder,
michael@0:                                           const nsRect&           aDirtyRect,
michael@0:                                           const nsDisplayListSet& aLists)
michael@0: {
michael@0:   // BuildDisplayListForChild puts stacking contexts into the PositionedDescendants
michael@0:   // list. So we need to map that list to aLists.Content(). This is an easy way to
michael@0:   // do that.
michael@0:   nsDisplayList* content = aLists.Content();
michael@0:   nsDisplayListSet kidLists(content, content, content, content, content, content);
michael@0:   nsIFrame* kid = mFrames.FirstChild();
michael@0:   while (kid) {
michael@0:     // Force each child into its own true stacking context.
michael@0:     BuildDisplayListForChild(aBuilder, kid, aDirtyRect, kidLists,
michael@0:                              DISPLAY_CHILD_FORCE_STACKING_CONTEXT);
michael@0:     kid = kid->GetNextSibling();
michael@0:   }
michael@0: }