gecko-dev/layout/tables/nsCellMap.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsCellMap_h__
#define nsCellMap_h__
#include "nscore.h"
#include "celldata.h"
#include "nsVoidArray.h"
class nsTableColFrame;
class nsTableCellFrame;
class nsIPresContext;
class nsTableRowGroupFrame;
class nsTableFrame;
class nsCellMap;
struct nsColInfo
{
PRInt32 mNumCellsOrig; // number of cells originating in the col
PRInt32 mNumCellsSpan; // number of cells spanning into the col via colspans (not rowspans)
// for simplicity, a colspan=0 cell is only counted as spanning the
// 1st col to the right of where it orginates
nsColInfo();
nsColInfo(PRInt32 aNumCellsOrig,
PRInt32 aNumCellsSpan);
};
class nsTableCellMap
{
public:
nsTableCellMap(nsIPresContext* aPresContext, nsTableFrame& aTableFrame);
/** destructor
* NOT VIRTUAL BECAUSE THIS CLASS SHOULD **NEVER** BE SUBCLASSED
*/
~nsTableCellMap();
void RemoveGroupCellMap(nsTableRowGroupFrame* aRowGroup);
void InsertGroupCellMap(PRInt32 aRowIndex,
nsTableRowGroupFrame& aNewRowGroup);
void InsertGroupCellMap(nsTableRowGroupFrame* aPrevRowGroup,
nsTableRowGroupFrame& aNewRowGroup);
nsTableCellFrame* GetCellFrame(PRInt32 aRowIndex,
PRInt32 aColIndex,
CellData& aData,
PRBool aUseRowIfOverlap) const;
/** return the CellData for the cell at (aTableRowIndex, aTableColIndex) */
CellData* GetCellAt(PRInt32 aRowIndex,
PRInt32 aColIndex);
nsColInfo* GetColInfoAt(PRInt32 aColIndex);
/** append the cellFrame at the end of the row at aRowIndex and return the col index
*/
PRInt32 AppendCell(nsTableCellFrame& aCellFrame,
PRInt32 aRowIndex,
PRBool aRebuildIfNecessary);
void InsertCells(nsVoidArray& aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndexBefore);
void RemoveCell(nsTableCellFrame* aCellFrame,
PRInt32 aRowIndex);
void InsertRows(nsIPresContext* aPresContext,
nsTableRowGroupFrame& aRowGroup,
nsVoidArray& aRows,
PRInt32 aFirstRowIndex,
PRBool aConsiderSpans);
void RemoveRows(nsIPresContext* aPresContext,
PRInt32 aFirstRowIndex,
PRInt32 aNumRowsToRemove,
PRBool aConsiderSpans);
PRInt32 GetNumCellsOriginatingInRow(PRInt32 aRowIndex);
PRInt32 GetNumCellsOriginatingInCol(PRInt32 aColIndex) const;
PRInt32 GetEffectiveRowSpan(PRInt32 aRowIndex,
PRInt32 aColIndex);
PRInt32 GetEffectiveColSpan(PRInt32 aRowIndex,
PRInt32 aColIndex);
/** return the total number of columns in the table represented by this CellMap */
PRInt32 GetColCount() const;
/** return the actual number of rows in the table represented by this CellMap */
PRInt32 GetRowCount() const;
nsTableCellFrame* GetCellInfoAt(PRInt32 aRowX,
PRInt32 aColX,
PRBool* aOriginates = nsnull,
PRInt32* aColSpan = nsnull);
void AddColsAtEnd(PRUint32 aNumCols);
PRInt32 RemoveUnusedCols(PRInt32 aMaxNumToRemove);
PRBool RowIsSpannedInto(PRInt32 aRowIndex);
PRBool RowHasSpanningCells(PRInt32 aRowIndex);
PRBool ColIsSpannedInto(PRInt32 aColIndex);
PRBool ColHasSpanningCells(PRInt32 aColIndex);
/** dump a representation of the cell map to stdout for debugging */
#ifdef NS_DEBUG
void Dump() const;
#endif
#ifdef DEBUG
void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
protected:
friend class nsCellMap;
void InsertGroupCellMap(nsCellMap* aPrevMap,
nsCellMap& aNewMap);
nsVoidArray mCols;
nsCellMap* mFirstMap;
};
/** nsCellMap is a support class for nsTablePart.
* It maintains an Rows x Columns grid onto which the cells of the table are mapped.
* This makes processing of rowspan and colspan attributes much easier.
* Each cell is represented by a CellData object.
*
* @see CellData
* @see nsTableFrame::AddCellToMap
* @see nsTableFrame::GrowCellMap
* @see nsTableFrame::BuildCellIntoMap
*
* mRows is an array of rows. a row cannot be null.
* each row is an array of cells. a cell can be null.
*/
class nsCellMap
{
public:
/** constructor
* @param aNumRows - initial number of rows
* @param aNumColumns - initial number of columns
*/
nsCellMap(nsTableRowGroupFrame& aRowGroupFrame);
/** destructor
* NOT VIRTUAL BECAUSE THIS CLASS SHOULD **NEVER** BE SUBCLASSED
*/
~nsCellMap();
nsCellMap* GetNextSibling() const;
void SetNextSibling(nsCellMap* aSibling);
nsTableRowGroupFrame* GetRowGroup() const;
nsTableCellFrame* GetCellFrame(PRInt32 aRowIndex,
PRInt32 aColIndex,
CellData& aData,
PRBool aUseRowSpanIfOverlap) const;
/** return the CellData for the cell at (aTableRowIndex, aTableColIndex) */
CellData* GetCellAt(nsTableCellMap& aMap,
PRInt32 aRowIndex,
PRInt32 aColIndex);
/** append the cellFrame at the end of the row at aRowIndex and return the col index
*/
PRInt32 AppendCell(nsTableCellMap& aMap,
nsTableCellFrame& aCellFrame,
PRInt32 aRowIndex,
PRBool aRebuildIfNecessary);
void InsertCells(nsTableCellMap& aMap,
nsVoidArray& aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndexBefore);
void RemoveCell(nsTableCellMap& aMap,
nsTableCellFrame* aCellFrame,
PRInt32 aRowIndex);
void RemoveCol(PRInt32 aColIndex);
void InsertRows(nsIPresContext* aPresContext,
nsTableCellMap& aMap,
nsVoidArray& aRows,
PRInt32 aFirstRowIndex,
PRBool aConsiderSpans);
void RemoveRows(nsIPresContext* aPresContext,
nsTableCellMap& aMap,
PRInt32 aFirstRowIndex,
PRInt32 aNumRowsToRemove,
PRBool aConsiderSpans);
PRInt32 GetNumCellsOriginatingInRow(PRInt32 aRowIndex) const;
PRInt32 GetNumCellsOriginatingInCol(PRInt32 aColIndex) const;
/** return the actual number of rows in the table represented by this CellMap */
PRInt32 GetRowCount() const;
nsTableCellFrame* GetCellInfoAt(nsTableCellMap& aMap,
PRInt32 aRowX,
PRInt32 aColX,
PRBool* aOriginates = nsnull,
PRInt32* aColSpan = nsnull);
PRBool RowIsSpannedInto(nsTableCellMap& aMap,
PRInt32 aRowIndex);
PRBool RowHasSpanningCells(nsTableCellMap& aMap,
PRInt32 aRowIndex);
PRBool ColIsSpannedInto(nsTableCellMap& aMap,
PRInt32 aColIndex);
PRBool ColHasSpanningCells(nsTableCellMap& aMap,
PRInt32 aColIndex);
/** dump a representation of the cell map to stdout for debugging */
#ifdef NS_DEBUG
void Dump() const;
#endif
#ifdef DEBUG
void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
protected:
friend class nsTableCellMap;
PRBool Grow(nsTableCellMap& aMap,
PRInt32 aNumRows,
PRInt32 aRowIndex = -1);
void GrowRow(nsVoidArray& aRow,
PRInt32 aNumCols);
/** assign aCellData to the cell at (aRow,aColumn) */
void SetMapCellAt(nsTableCellMap& aMap,
CellData& aCellData,
PRInt32 aMapRowIndex,
PRInt32 aColIndex,
PRBool aCountZeroSpanAsSpan);
CellData* GetMapCellAt(nsTableCellMap& aMap,
PRInt32 aMapRowIndex,
PRInt32 aColIndex,
PRBool aUpdateZeroSpan);
PRInt32 GetNumCellsIn(PRInt32 aColIndex) const;
void ExpandWithRows(nsIPresContext* aPresContext,
nsTableCellMap& aMap,
nsVoidArray& aRowFrames,
PRInt32 aStartRowIndex);
void ExpandWithCells(nsTableCellMap& aMap,
nsVoidArray& aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRInt32 aRowSpan,
PRBool aRowSpanIsZero);
void ShrinkWithoutRows(nsTableCellMap& aMap,
PRInt32 aFirstRowIndex,
PRInt32 aNumRowsToRemove);
void ShrinkWithoutCell(nsTableCellMap& aMap,
nsTableCellFrame& aCellFrame,
PRInt32 aRowIndex,
PRInt32 aColIndex);
void RebuildConsideringRows(nsIPresContext* aPresContext,
nsTableCellMap& aMap,
PRInt32 aStartRowIndex,
nsVoidArray* aRowsToInsert,
PRInt32 aNumRowsToRemove = 0);
void RebuildConsideringCells(nsTableCellMap& aMap,
nsVoidArray* aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRBool aInsert);
PRBool CellsSpanOut(nsIPresContext* aPresContext,
nsVoidArray& aNewRows);
PRBool CellsSpanInOrOut(nsTableCellMap& aMap,
PRInt32 aStartRowIndex,
PRInt32 aEndRowIndex,
PRInt32 aStartColIndex,
PRInt32 aEndColIndex);
void ExpandForZeroSpan(nsTableCellFrame* aCellFrame,
PRInt32 aNumColsInTable);
PRBool CreateEmptyRow(PRInt32 aRowIndex,
PRInt32 aNumCols);
PRInt32 GetRowSpan(nsTableCellMap& aMap,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRBool aGetEffective,
PRBool& aIsZeroRowSpan);
PRInt32 GetRowSpanForNewCell(nsTableCellFrame& aCellFrameToAdd,
PRInt32 aRowIndex,
PRBool& aIsZeroRowSpan);
PRInt32 GetEffectiveColSpan(nsTableCellMap& aMap,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRBool& aIsZeroColSpan);
PRInt32 GetColSpanForNewCell(nsTableCellFrame& aCellFrameToAdd,
PRInt32 aColIndex,
PRInt32 aNumColsInTable,
PRBool& aIsZeroColSpan);
void AdjustForZeroSpan(nsTableCellMap& aMap,
PRInt32 aRowIndex,
PRInt32 aColIndex);
PRBool IsZeroColSpan(PRInt32 aRowIndex,
PRInt32 aColIndex) const;
/** an array containing col array. It can be larger than mRowCount due to
* row spans extending beyond the table */
nsVoidArray mRows;
/** the number of rows in the table which is <= the number of rows in the cell map
* due to row spans extending beyond the end of the table (dead rows) */
PRInt32 mRowCount;
// the row group that corresponds to this map
nsTableRowGroupFrame* mRowGroupFrame;
// the next row group cell map
nsCellMap* mNextSibling;
};
/* ----- inline methods ----- */
inline PRInt32 nsTableCellMap::GetColCount() const
{
return mCols.Count();
}
inline nsCellMap* nsCellMap::GetNextSibling() const
{
return mNextSibling;
}
inline void nsCellMap::SetNextSibling(nsCellMap* aSibling)
{
mNextSibling = aSibling;
}
inline nsTableRowGroupFrame* nsCellMap::GetRowGroup() const
{
return mRowGroupFrame;
}
inline PRInt32 nsCellMap::GetRowCount() const
{
return mRowCount;
}
// nsColInfo
inline nsColInfo::nsColInfo()
:mNumCellsOrig(0), mNumCellsSpan(0)
{}
inline nsColInfo::nsColInfo(PRInt32 aNumCellsOrig,
PRInt32 aNumCellsSpan)
:mNumCellsOrig(aNumCellsOrig), mNumCellsSpan(aNumCellsSpan)
{}
#endif