1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
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9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla Communicator client code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
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22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
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26 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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37 :
38 : //
39 : // Eric Vaughan
40 : // Netscape Communications
41 : //
42 : // See documentation in associated header file
43 : //
44 :
45 : #include "nsStackFrame.h"
46 : #include "nsStyleContext.h"
47 : #include "nsIContent.h"
48 : #include "nsCOMPtr.h"
49 : #include "nsHTMLParts.h"
50 : #include "nsIPresShell.h"
51 : #include "nsCSSRendering.h"
52 : #include "nsBoxLayoutState.h"
53 : #include "nsStackLayout.h"
54 : #include "nsDisplayList.h"
55 :
56 : nsIFrame*
57 0 : NS_NewStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
58 : {
59 0 : return new (aPresShell) nsStackFrame(aPresShell, aContext);
60 : }
61 :
62 0 : NS_IMPL_FRAMEARENA_HELPERS(nsStackFrame)
63 :
64 0 : nsStackFrame::nsStackFrame(nsIPresShell* aPresShell, nsStyleContext* aContext):
65 0 : nsBoxFrame(aPresShell, aContext)
66 : {
67 0 : nsCOMPtr<nsBoxLayout> layout;
68 0 : NS_NewStackLayout(aPresShell, layout);
69 0 : SetLayoutManager(layout);
70 0 : }
71 :
72 : // REVIEW: The old code put everything in the background layer. To be more
73 : // consistent with the way other frames work, I'm putting everything in the
74 : // Content() (i.e., foreground) layer (see nsFrame::BuildDisplayListForChild,
75 : // the case for stacking context but non-positioned, non-floating frames).
76 : // This could easily be changed back by hacking nsBoxFrame::BuildDisplayListInternal
77 : // a bit more.
78 : NS_IMETHODIMP
79 0 : nsStackFrame::BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
80 : const nsRect& aDirtyRect,
81 : const nsDisplayListSet& aLists)
82 : {
83 : // BuildDisplayListForChild puts stacking contexts into the PositionedDescendants
84 : // list. So we need to map that list to aLists.Content(). This is an easy way to
85 : // do that.
86 0 : nsDisplayList* content = aLists.Content();
87 0 : nsDisplayListSet kidLists(content, content, content, content, content, content);
88 0 : nsIFrame* kid = mFrames.FirstChild();
89 0 : while (kid) {
90 : // Force each child into its own true stacking context.
91 : nsresult rv =
92 : BuildDisplayListForChild(aBuilder, kid, aDirtyRect, kidLists,
93 0 : DISPLAY_CHILD_FORCE_STACKING_CONTEXT);
94 0 : NS_ENSURE_SUCCESS(rv, rv);
95 0 : kid = kid->GetNextSibling();
96 : }
97 0 : return NS_OK;
98 : }
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