133 lines
5.0 KiB
C++
133 lines
5.0 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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#ifndef nsGrid_h___
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#define nsGrid_h___
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#include "nsStackLayout.h"
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#include "nsIGridPart.h"
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#include "nsCOMPtr.h"
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#include "mozilla/UniquePtr.h"
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class nsBoxLayoutState;
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class nsGridCell;
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//#define DEBUG_grid 1
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/**
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* The grid data structure, i.e., the grid cellmap.
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*/
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class nsGrid
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{
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public:
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nsGrid();
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~nsGrid();
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nsGridRow* GetColumnAt(int32_t aIndex, bool aIsHorizontal = true);
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nsGridRow* GetRowAt(int32_t aIndex, bool aIsHorizontal = true);
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nsGridCell* GetCellAt(int32_t aX, int32_t aY);
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void NeedsRebuild(nsBoxLayoutState& aBoxLayoutState);
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void RebuildIfNeeded();
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// For all the methods taking an aIsHorizontal parameter:
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// * When aIsHorizontal is true, the words "rows" and (for
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// GetColumnCount) "columns" refer to their normal meanings.
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// * When aIsHorizontal is false, the meanings are flipped.
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// FIXME: Maybe eliminate GetColumnCount and change aIsHorizontal to
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// aIsRows? (Calling it horizontal doesn't really make sense because
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// row groups and columns have vertical orientation, whereas column
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// groups and rows are horizontal.)
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nsSize GetPrefRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
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nsSize GetMinRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
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nsSize GetMaxRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
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nscoord GetRowFlex(int32_t aRowIndex, bool aIsHorizontal = true);
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nscoord GetPrefRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
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nscoord GetMinRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
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nscoord GetMaxRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
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void GetRowOffsets(int32_t aIndex, nscoord& aTop, nscoord& aBottom, bool aIsHorizontal = true);
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void RowAddedOrRemoved(nsBoxLayoutState& aBoxLayoutState, int32_t aIndex, bool aIsHorizontal = true);
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void CellAddedOrRemoved(nsBoxLayoutState& aBoxLayoutState, int32_t aIndex, bool aIsHorizontal = true);
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void DirtyRows(nsIFrame* aRowBox, nsBoxLayoutState& aState);
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#ifdef DEBUG_grid
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void PrintCellMap();
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#endif
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int32_t GetExtraColumnCount(bool aIsHorizontal = true);
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int32_t GetExtraRowCount(bool aIsHorizontal = true);
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// accessors
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void SetBox(nsIFrame* aBox) { mBox = aBox; }
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nsIFrame* GetBox() { return mBox; }
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nsIFrame* GetRowsBox() { return mRowsBox; }
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nsIFrame* GetColumnsBox() { return mColumnsBox; }
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int32_t GetRowCount(int32_t aIsHorizontal = true);
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int32_t GetColumnCount(int32_t aIsHorizontal = true);
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static nsIFrame* GetScrolledBox(nsIFrame* aChild);
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static nsIFrame* GetScrollBox(nsIFrame* aChild);
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static nsIGridPart* GetPartFromBox(nsIFrame* aBox);
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void GetFirstAndLastRow(int32_t& aFirstIndex,
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int32_t& aLastIndex,
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nsGridRow*& aFirstRow,
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nsGridRow*& aLastRow,
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bool aIsHorizontal);
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private:
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nsMargin GetBoxTotalMargin(nsIFrame* aBox, bool aIsHorizontal = true);
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void FreeMap();
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void FindRowsAndColumns(nsIFrame** aRows, nsIFrame** aColumns);
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mozilla::UniquePtr<nsGridRow[]> BuildRows(nsIFrame* aBox, int32_t aSize,
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bool aIsHorizontal = true);
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mozilla::UniquePtr<nsGridCell[]> BuildCellMap(int32_t aRows, int32_t aColumns);
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void PopulateCellMap(nsGridRow* aRows, nsGridRow* aColumns, int32_t aRowCount, int32_t aColumnCount, bool aIsHorizontal = true);
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void CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount);
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void SetLargestSize(nsSize& aSize, nscoord aHeight, bool aIsHorizontal = true);
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void SetSmallestSize(nsSize& aSize, nscoord aHeight, bool aIsHorizontal = true);
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bool IsGrid(nsIFrame* aBox);
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// the box that implement the <grid> tag
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nsIFrame* mBox;
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// an array of row object
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mozilla::UniquePtr<nsGridRow[]> mRows;
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// an array of columns objects.
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mozilla::UniquePtr<nsGridRow[]> mColumns;
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// the first in the <grid> that implements the <rows> tag.
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nsIFrame* mRowsBox;
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// the first in the <grid> that implements the <columns> tag.
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nsIFrame* mColumnsBox;
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// a flag that is false tells us to rebuild the who grid
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bool mNeedsRebuild;
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// number of rows and columns as defined by the XUL
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int32_t mRowCount;
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int32_t mColumnCount;
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// number of rows and columns that are implied but not
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// explicitly defined int he XUL
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int32_t mExtraRowCount;
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int32_t mExtraColumnCount;
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// x,y array of cells in the rows and columns
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mozilla::UniquePtr<nsGridCell[]> mCellMap;
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// a flag that when true suppresses all other MarkDirties. This
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// prevents lots of extra work being done.
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bool mMarkingDirty;
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};
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#endif
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