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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsGrid_h___
#define nsGrid_h___
#include "nsStackLayout.h"
#include "nsIGridPart.h"
#include "nsCOMPtr.h"
#include "mozilla/UniquePtr.h"
class nsBoxLayoutState;
class nsGridCell;
//#define DEBUG_grid 1
/**
* The grid data structure, i.e., the grid cellmap.
*/
class nsGrid
{
public:
nsGrid();
~nsGrid();
nsGridRow* GetColumnAt(int32_t aIndex, bool aIsHorizontal = true);
nsGridRow* GetRowAt(int32_t aIndex, bool aIsHorizontal = true);
nsGridCell* GetCellAt(int32_t aX, int32_t aY);
void NeedsRebuild(nsBoxLayoutState& aBoxLayoutState);
void RebuildIfNeeded();
// For all the methods taking an aIsHorizontal parameter:
// * When aIsHorizontal is true, the words "rows" and (for
// GetColumnCount) "columns" refer to their normal meanings.
// * When aIsHorizontal is false, the meanings are flipped.
// FIXME: Maybe eliminate GetColumnCount and change aIsHorizontal to
// aIsRows? (Calling it horizontal doesn't really make sense because
// row groups and columns have vertical orientation, whereas column
// groups and rows are horizontal.)
nsSize GetPrefRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
nsSize GetMinRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
nsSize GetMaxRowSize(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
nscoord GetRowFlex(int32_t aRowIndex, bool aIsHorizontal = true);
nscoord GetPrefRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
nscoord GetMinRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
nscoord GetMaxRowHeight(nsBoxLayoutState& aBoxLayoutState, int32_t aRowIndex, bool aIsHorizontal = true);
void GetRowOffsets(int32_t aIndex, nscoord& aTop, nscoord& aBottom, bool aIsHorizontal = true);
void RowAddedOrRemoved(nsBoxLayoutState& aBoxLayoutState, int32_t aIndex, bool aIsHorizontal = true);
void CellAddedOrRemoved(nsBoxLayoutState& aBoxLayoutState, int32_t aIndex, bool aIsHorizontal = true);
void DirtyRows(nsIFrame* aRowBox, nsBoxLayoutState& aState);
#ifdef DEBUG_grid
void PrintCellMap();
#endif
int32_t GetExtraColumnCount(bool aIsHorizontal = true);
int32_t GetExtraRowCount(bool aIsHorizontal = true);
// accessors
void SetBox(nsIFrame* aBox) { mBox = aBox; }
nsIFrame* GetBox() { return mBox; }
nsIFrame* GetRowsBox() { return mRowsBox; }
nsIFrame* GetColumnsBox() { return mColumnsBox; }
int32_t GetRowCount(int32_t aIsHorizontal = true);
int32_t GetColumnCount(int32_t aIsHorizontal = true);
static nsIFrame* GetScrolledBox(nsIFrame* aChild);
static nsIFrame* GetScrollBox(nsIFrame* aChild);
static nsIGridPart* GetPartFromBox(nsIFrame* aBox);
void GetFirstAndLastRow(int32_t& aFirstIndex,
int32_t& aLastIndex,
nsGridRow*& aFirstRow,
nsGridRow*& aLastRow,
bool aIsHorizontal);
private:
nsMargin GetBoxTotalMargin(nsIFrame* aBox, bool aIsHorizontal = true);
void FreeMap();
void FindRowsAndColumns(nsIFrame** aRows, nsIFrame** aColumns);
mozilla::UniquePtr<nsGridRow[]> BuildRows(nsIFrame* aBox, int32_t aSize,
bool aIsHorizontal = true);
mozilla::UniquePtr<nsGridCell[]> BuildCellMap(int32_t aRows, int32_t aColumns);
void PopulateCellMap(nsGridRow* aRows, nsGridRow* aColumns, int32_t aRowCount, int32_t aColumnCount, bool aIsHorizontal = true);
void CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount);
void SetLargestSize(nsSize& aSize, nscoord aHeight, bool aIsHorizontal = true);
void SetSmallestSize(nsSize& aSize, nscoord aHeight, bool aIsHorizontal = true);
bool IsGrid(nsIFrame* aBox);
// the box that implement the <grid> tag
nsIFrame* mBox;
// an array of row object
mozilla::UniquePtr<nsGridRow[]> mRows;
// an array of columns objects.
mozilla::UniquePtr<nsGridRow[]> mColumns;
// the first in the <grid> that implements the <rows> tag.
nsIFrame* mRowsBox;
// the first in the <grid> that implements the <columns> tag.
nsIFrame* mColumnsBox;
// a flag that is false tells us to rebuild the who grid
bool mNeedsRebuild;
// number of rows and columns as defined by the XUL
int32_t mRowCount;
int32_t mColumnCount;
// number of rows and columns that are implied but not
// explicitly defined int he XUL
int32_t mExtraRowCount;
int32_t mExtraColumnCount;
// x,y array of cells in the rows and columns
mozilla::UniquePtr<nsGridCell[]> mCellMap;
// a flag that when true suppresses all other MarkDirties. This
// prevents lots of extra work being done.
bool mMarkingDirty;
};
#endif
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