1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/grid/nsGrid.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,133 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef nsGrid_h___
1.11 +#define nsGrid_h___
1.12 +
1.13 +#include "nsStackLayout.h"
1.14 +#include "nsIGridPart.h"
1.15 +#include "nsCOMPtr.h"
1.16 +
1.17 +class nsGridRowGroupLayout;
1.18 +class nsGridRowLayout;
1.19 +class nsBoxLayoutState;
1.20 +class nsGridCell;
1.21 +
1.22 +//#define DEBUG_grid 1
1.23 +
1.24 +/**
1.25 + * The grid data structure, i.e., the grid cellmap.
1.26 + */
1.27 +class nsGrid
1.28 +{
1.29 +public:
1.30 + nsGrid();
1.31 + ~nsGrid();
1.32 +
1.33 + nsGridRow* GetColumnAt(int32_t aIndex, bool aIsHorizontal = true);
1.34 + nsGridRow* GetRowAt(int32_t aIndex, bool aIsHorizontal = true);
1.35 + nsGridCell* GetCellAt(int32_t aX, int32_t aY);
1.36 +
1.37 + void NeedsRebuild(nsBoxLayoutState& aBoxLayoutState);
1.38 + void RebuildIfNeeded();
1.39 +
1.40 + // For all the methods taking an aIsHorizontal parameter:
1.41 + // * When aIsHorizontal is true, the words "rows" and (for
1.42 + // GetColumnCount) "columns" refer to their normal meanings.
1.43 + // * When aIsHorizontal is false, the meanings are flipped.
1.44 + // FIXME: Maybe eliminate GetColumnCount and change aIsHorizontal to
1.45 + // aIsRows? (Calling it horizontal doesn't really make sense because
1.46 + // row groups and columns have vertical orientation, whereas column
1.47 + // groups and rows are horizontal.)
1.48 +
1.49 + nsSize GetPrefRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
1.50 + nsSize GetMinRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
1.51 + nsSize GetMaxRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
1.52 + nscoord GetRowFlex(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
1.53 +
1.54 + nscoord GetPrefRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
1.55 + nscoord GetMinRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
1.56 + nscoord GetMaxRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
1.57 + void GetRowOffsets(nsBoxLayoutState& aState, int32_t aIndex, nscoord& aTop, nscoord& aBottom, bool aIsHorizontal = true);
1.58 +
1.59 + void RowAddedOrRemoved(nsBoxLayoutState& aBoxLayoutState, int32_t aIndex, bool aIsHorizontal = true);
1.60 + void CellAddedOrRemoved(nsBoxLayoutState& aBoxLayoutState, int32_t aIndex, bool aIsHorizontal = true);
1.61 + void DirtyRows(nsIFrame* aRowBox, nsBoxLayoutState& aState);
1.62 +#ifdef DEBUG_grid
1.63 + void PrintCellMap();
1.64 +#endif
1.65 + int32_t GetExtraColumnCount(bool aIsHorizontal = true);
1.66 + int32_t GetExtraRowCount(bool aIsHorizontal = true);
1.67 +
1.68 +// accessors
1.69 + void SetBox(nsIFrame* aBox) { mBox = aBox; }
1.70 + nsIFrame* GetBox() { return mBox; }
1.71 + nsIFrame* GetRowsBox() { return mRowsBox; }
1.72 + nsIFrame* GetColumnsBox() { return mColumnsBox; }
1.73 + int32_t GetRowCount(int32_t aIsHorizontal = true);
1.74 + int32_t GetColumnCount(int32_t aIsHorizontal = true);
1.75 +
1.76 + static nsIFrame* GetScrolledBox(nsIFrame* aChild);
1.77 + static nsIFrame* GetScrollBox(nsIFrame* aChild);
1.78 + static nsIGridPart* GetPartFromBox(nsIFrame* aBox);
1.79 + void GetFirstAndLastRow(nsBoxLayoutState& aState,
1.80 + int32_t& aFirstIndex,
1.81 + int32_t& aLastIndex,
1.82 + nsGridRow*& aFirstRow,
1.83 + nsGridRow*& aLastRow,
1.84 + bool aIsHorizontal);
1.85 +
1.86 +private:
1.87 +
1.88 + nsMargin GetBoxTotalMargin(nsIFrame* aBox, bool aIsHorizontal = true);
1.89 +
1.90 + void FreeMap();
1.91 + void FindRowsAndColumns(nsIFrame** aRows, nsIFrame** aColumns);
1.92 + void BuildRows(nsIFrame* aBox, int32_t aSize, nsGridRow** aColumnsRows, bool aIsHorizontal = true);
1.93 + nsGridCell* BuildCellMap(int32_t aRows, int32_t aColumns);
1.94 + void PopulateCellMap(nsGridRow* aRows, nsGridRow* aColumns, int32_t aRowCount, int32_t aColumnCount, bool aIsHorizontal = true);
1.95 + void CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount);
1.96 + void SetLargestSize(nsSize& aSize, nscoord aHeight, bool aIsHorizontal = true);
1.97 + void SetSmallestSize(nsSize& aSize, nscoord aHeight, bool aIsHorizontal = true);
1.98 + bool IsGrid(nsIFrame* aBox);
1.99 +
1.100 + // the box that implement the <grid> tag
1.101 + nsIFrame* mBox;
1.102 +
1.103 + // an array of row object
1.104 + nsGridRow* mRows;
1.105 +
1.106 + // an array of columns objects.
1.107 + nsGridRow* mColumns;
1.108 +
1.109 + // the first in the <grid> that implements the <rows> tag.
1.110 + nsIFrame* mRowsBox;
1.111 +
1.112 + // the first in the <grid> that implements the <columns> tag.
1.113 + nsIFrame* mColumnsBox;
1.114 +
1.115 + // a flag that is false tells us to rebuild the who grid
1.116 + bool mNeedsRebuild;
1.117 +
1.118 + // number of rows and columns as defined by the XUL
1.119 + int32_t mRowCount;
1.120 + int32_t mColumnCount;
1.121 +
1.122 + // number of rows and columns that are implied but not
1.123 + // explicitly defined int he XUL
1.124 + int32_t mExtraRowCount;
1.125 + int32_t mExtraColumnCount;
1.126 +
1.127 + // x,y array of cells in the rows and columns
1.128 + nsGridCell* mCellMap;
1.129 +
1.130 + // a flag that when true suppresses all other MarkDirties. This
1.131 + // prevents lots of extra work being done.
1.132 + bool mMarkingDirty;
1.133 +};
1.134 +
1.135 +#endif
1.136 +
