1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 // 8 // Eric Vaughan 9 // Netscape Communications 10 // 11 // See documentation in associated header file 12 // 13 14 #include "nsGridRowGroupFrame.h" 15 #include "nsGridRowLeafLayout.h" 16 #include "nsGridRow.h" 17 #include "nsBoxLayoutState.h" 18 #include "nsGridLayout2.h" 19 20 already_AddRefed<nsBoxLayout> NS_NewGridRowGroupLayout(); 21 NS_NewGridRowGroupFrame(nsIPresShell * aPresShell,nsStyleContext * aContext)22nsIFrame* NS_NewGridRowGroupFrame(nsIPresShell* aPresShell, 23 nsStyleContext* aContext) { 24 nsCOMPtr<nsBoxLayout> layout = NS_NewGridRowGroupLayout(); 25 return new (aPresShell) nsGridRowGroupFrame(aContext, layout); 26 } 27 NS_IMPL_FRAMEARENA_HELPERS(nsGridRowGroupFrame)28NS_IMPL_FRAMEARENA_HELPERS(nsGridRowGroupFrame) 29 30 /** 31 * This is redefined because row groups have a funny property. If they are 32 * flexible then their flex must be equal to the sum of their children's flexes. 33 */ 34 nscoord nsGridRowGroupFrame::GetXULFlex() { 35 // if we are flexible out flexibility is determined by our columns. 36 // so first get the our flex. If not 0 then our flex is the sum of 37 // our columns flexes. 38 39 if (!DoesNeedRecalc(mFlex)) return mFlex; 40 41 if (nsBoxFrame::GetXULFlex() == 0) return 0; 42 43 // ok we are flexible add up our children 44 nscoord totalFlex = 0; 45 nsIFrame* child = nsBox::GetChildXULBox(this); 46 while (child) { 47 totalFlex += child->GetXULFlex(); 48 child = GetNextXULBox(child); 49 } 50 51 mFlex = totalFlex; 52 53 return totalFlex; 54 } 55