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104 lines
4.0 KiB
C++
104 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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//
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// Eric Vaughan
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// Netscape Communications
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//
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// See documentation in associated header file
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//
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#include "nsStackFrame.h"
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#include "nsStyleContext.h"
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#include "nsPresContext.h"
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#include "nsIContent.h"
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#include "nsCOMPtr.h"
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#include "nsUnitConversion.h"
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#include "nsHTMLParts.h"
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#include "nsIPresShell.h"
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#include "nsCSSRendering.h"
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#include "nsBoxLayoutState.h"
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#include "nsStackLayout.h"
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#include "nsDisplayList.h"
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nsIFrame*
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NS_NewStackFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, nsIBoxLayout* aLayoutManager)
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{
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return new (aPresShell) nsStackFrame(aPresShell, aContext, aLayoutManager);
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} // NS_NewStackFrame
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nsStackFrame::nsStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, nsIBoxLayout* aLayoutManager):
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nsBoxFrame(aPresShell, aContext)
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{
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// if no layout manager specified us the stack layout
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nsCOMPtr<nsIBoxLayout> layout = aLayoutManager;
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if (layout == nsnull) {
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NS_NewStackLayout(aPresShell, layout);
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}
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SetLayoutManager(layout);
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}
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// REVIEW: The old code put everything in the background layer. To be more
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// consistent with the way other frames work, I'm putting everything in the
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// Content() (i.e., foreground) layer (see nsFrame::BuildDisplayListForChild,
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// the case for stacking context but non-positioned, non-floating frames).
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// This could easily be changed back by hacking nsBoxFrame::BuildDisplayListInternal
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// a bit more.
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NS_IMETHODIMP
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nsStackFrame::BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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// BuildDisplayListForChild puts stacking contexts into the PositionedDescendants
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// list. So we need to map that list to aLists.Content(). This is an easy way to
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// do that.
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nsDisplayList* content = aLists.Content();
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nsDisplayListSet kidLists(content, content, content, content, content, content);
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nsIFrame* kid = mFrames.FirstChild();
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while (kid) {
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// Force each child into its own true stacking context.
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nsresult rv =
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BuildDisplayListForChild(aBuilder, kid, aDirtyRect, kidLists,
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DISPLAY_CHILD_FORCE_STACKING_CONTEXT);
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NS_ENSURE_SUCCESS(rv, rv);
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kid = kid->GetNextSibling();
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}
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return NS_OK;
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}
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