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64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 "nsGridRowGroupFrame.h"
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#include "nsGridRowLeafLayout.h"
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#include "nsGridRow.h"
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#include "nsBoxLayoutState.h"
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#include "nsGridLayout2.h"
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already_AddRefed<nsBoxLayout> NS_NewGridRowGroupLayout();
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nsIFrame*
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NS_NewGridRowGroupFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext)
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{
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nsCOMPtr<nsBoxLayout> layout = NS_NewGridRowGroupLayout();
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return new (aPresShell) nsGridRowGroupFrame(aContext, layout);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsGridRowGroupFrame)
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/**
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* This is redefined because row groups have a funny property. If they are flexible
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* then their flex must be equal to the sum of their children's flexes.
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*/
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nscoord
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nsGridRowGroupFrame::GetFlex(nsBoxLayoutState& aState)
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{
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// if we are flexible out flexibility is determined by our columns.
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// so first get the our flex. If not 0 then our flex is the sum of
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// our columns flexes.
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if (!DoesNeedRecalc(mFlex))
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return mFlex;
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if (nsBoxFrame::GetFlex(aState) == 0)
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return 0;
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// ok we are flexible add up our children
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nscoord totalFlex = 0;
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nsIFrame* child = nsBox::GetChildBox(this);
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while (child)
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{
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totalFlex += child->GetFlex(aState);
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child = GetNextBox(child);
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}
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mFlex = totalFlex;
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return totalFlex;
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}
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