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
8 : * http://www.mozilla.org/MPL/
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.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either of the GNU General Public License Version 2 or later (the "GPL"),
26 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : //
39 : // Eric Vaughan
40 : // Netscape Communications
41 : //
42 : // See documentation in associated header file
43 : //
44 :
45 : #include "nsGridRowGroupFrame.h"
46 : #include "nsGridRowLeafLayout.h"
47 : #include "nsGridRow.h"
48 : #include "nsBoxLayoutState.h"
49 : #include "nsGridLayout2.h"
50 :
51 : already_AddRefed<nsBoxLayout> NS_NewGridRowGroupLayout();
52 :
53 : nsIFrame*
54 0 : NS_NewGridRowGroupFrame(nsIPresShell* aPresShell,
55 : nsStyleContext* aContext)
56 : {
57 0 : nsCOMPtr<nsBoxLayout> layout = NS_NewGridRowGroupLayout();
58 0 : if (!layout) {
59 0 : return nsnull;
60 : }
61 :
62 0 : return new (aPresShell) nsGridRowGroupFrame(aPresShell, aContext, layout);
63 : }
64 :
65 0 : NS_IMPL_FRAMEARENA_HELPERS(nsGridRowGroupFrame)
66 :
67 :
68 : /**
69 : * This is redefined because row groups have a funny property. If they are flexible
70 : * then their flex must be equal to the sum of their children's flexes.
71 : */
72 : nscoord
73 0 : nsGridRowGroupFrame::GetFlex(nsBoxLayoutState& aState)
74 : {
75 : // if we are flexible out flexibility is determined by our columns.
76 : // so first get the our flex. If not 0 then our flex is the sum of
77 : // our columns flexes.
78 :
79 0 : if (!DoesNeedRecalc(mFlex))
80 0 : return mFlex;
81 :
82 0 : if (nsBoxFrame::GetFlex(aState) == 0)
83 0 : return 0;
84 :
85 : // ok we are flexible add up our children
86 0 : nscoord totalFlex = 0;
87 0 : nsIBox* child = GetChildBox();
88 0 : while (child)
89 : {
90 0 : totalFlex += child->GetFlex(aState);
91 0 : child = child->GetNextBox();
92 : }
93 :
94 0 : mFlex = totalFlex;
95 :
96 0 : return totalFlex;
97 : }
98 :
99 :
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