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       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : /**
       7             : 
       8             :   Author:
       9             :   Eric D Vaughan
      10             : 
      11             : **/
      12             : 
      13             : #ifndef nsGridRowLayout_h___
      14             : #define nsGridRowLayout_h___
      15             : 
      16             : #include "mozilla/Attributes.h"
      17             : #include "nsSprocketLayout.h"
      18             : #include "nsIGridPart.h"
      19             : class nsGridRowGroupLayout;
      20             : class nsGridLayout2;
      21             : class nsBoxLayoutState;
      22             : class nsGrid;
      23             : 
      24             : /**
      25             :  * A common base class for nsGridRowLeafLayout (the nsBoxLayout object
      26             :  * for a grid row or column) and nsGridRowGroupLayout (the nsBoxLayout
      27             :  * object for a grid row group or column group).
      28             :  */
      29             : // XXXldb This needs a name that indicates that it's a base class for
      30             : // both row and rows (row-group).
      31             : class nsGridRowLayout : public nsSprocketLayout,
      32             :                         public nsIGridPart
      33             : {
      34             : public:
      35             :   NS_DECL_ISUPPORTS_INHERITED
      36             : 
      37           0 :   virtual nsGridRowGroupLayout* CastToRowGroupLayout() override { return nullptr; }
      38           0 :   virtual nsGridLayout2* CastToGridLayout() override { return nullptr; }
      39             :   virtual nsGrid* GetGrid(nsIFrame* aBox, int32_t* aIndex, nsGridRowLayout* aRequestor=nullptr) override;
      40             :   virtual nsIGridPart* GetParentGridPart(nsIFrame* aBox, nsIFrame** aParentBox) override;
      41             :   virtual void ChildrenInserted(nsIFrame* aBox, nsBoxLayoutState& aState,
      42             :                                 nsIFrame* aPrevBox,
      43             :                                 const nsFrameList::Slice& aNewChildren) override;
      44             :   virtual void ChildrenAppended(nsIFrame* aBox, nsBoxLayoutState& aState,
      45             :                                 const nsFrameList::Slice& aNewChildren) override;
      46             :   virtual void ChildrenRemoved(nsIFrame* aBox, nsBoxLayoutState& aState, nsIFrame* aChildList) override;
      47             :   virtual void ChildrenSet(nsIFrame* aBox, nsBoxLayoutState& aState, nsIFrame* aChildList) override;
      48             :   virtual nsMargin GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal) override;
      49             : 
      50           0 :   virtual nsIGridPart* AsGridPart() override { return this; }
      51             : 
      52             : protected:
      53             :   virtual void ChildAddedOrRemoved(nsIFrame* aBox, nsBoxLayoutState& aState)=0;
      54             : 
      55             :   nsGridRowLayout();
      56             :   virtual ~nsGridRowLayout();
      57             : };
      58             : 
      59             : #endif
      60             :