gecko-dev/layout/tables/nsCellMap.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* 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
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* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* ***** END LICENSE BLOCK ***** */
#ifndef nsCellMap_h__
#define nsCellMap_h__
#include "nscore.h"
#include "celldata.h"
#include "nsVoidArray.h"
#include "nsRect.h"
#undef DEBUG_TABLE_CELLMAP
class nsTableColFrame;
class nsTableCellFrame;
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);
};
enum Corner
{
eTopLeft = 0,
eTopRight = 1,
eBottomRight = 2,
eBottomLeft = 3
};
struct BCInfo
{
nsVoidArray mRightBorders;
nsVoidArray mBottomBorders;
BCData mLowerRightCorner;
};
class nsTableCellMap
{
public:
nsTableCellMap(nsTableFrame& aTableFrame,
PRBool aBorderCollapse);
/** destructor
* NOT VIRTUAL BECAUSE THIS CLASS SHOULD **NEVER** BE SUBCLASSED
*/
~nsTableCellMap();
void RemoveGroupCellMap(nsTableRowGroupFrame* aRowGroup);
void InsertGroupCellMap(nsTableRowGroupFrame& aNewRowGroup,
nsTableRowGroupFrame*& aPrevRowGroup);
nsCellMap* GetMapFor(nsTableRowGroupFrame& aRowGroup);
nsTableCellFrame* GetCellFrame(PRInt32 aRowIndex,
PRInt32 aColIndex,
CellData& aData,
PRBool aUseRowIfOverlap) const;
/** return the CellData for the cell at (aTableRowIndex, aTableColIndex) */
CellData* GetDataAt(PRInt32 aRowIndex,
PRInt32 aColIndex,
PRBool aUpdateZeroSpan = PR_TRUE);
nsColInfo* GetColInfoAt(PRInt32 aColIndex);
/** append the cellFrame at the end of the row at aRowIndex and return the col index
*/
CellData* AppendCell(nsTableCellFrame& aCellFrame,
PRInt32 aRowIndex,
PRBool aRebuildIfNecessary,
nsRect& aDamageArea);
void InsertCells(nsVoidArray& aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndexBefore,
nsRect& aDamageArea);
void RemoveCell(nsTableCellFrame* aCellFrame,
PRInt32 aRowIndex,
nsRect& aDamageArea);
void InsertRows(nsTableRowGroupFrame& aRowGroup,
nsVoidArray& aRows,
PRInt32 aFirstRowIndex,
PRBool aConsiderSpans,
nsRect& aDamageArea);
void RemoveRows(PRInt32 aFirstRowIndex,
PRInt32 aNumRowsToRemove,
PRBool aConsiderSpans,
nsRect& aDamageArea);
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);
void RemoveColsAtEnd();
PRBool RowIsSpannedInto(PRInt32 aRowIndex);
PRBool RowHasSpanningCells(PRInt32 aRowIndex);
PRBool ColIsSpannedInto(PRInt32 aColIndex);
PRBool ColHasSpanningCells(PRInt32 aColIndex);
BCData* GetBCData(PRUint8 aSide,
nsCellMap& aCellMap,
PRUint32 aYPos,
PRUint32 aXPos,
PRBool aIsLowerRight = PR_FALSE);
void SetBCBorderEdge(PRUint8 aEdge,
nsCellMap& aCellMap,
PRUint32 aCellMapStart,
PRUint32 aYPos,
PRUint32 aXPos,
PRUint32 aLength,
BCBorderOwner aOwner,
nscoord aSize,
PRBool aChanged);
void SetBCBorderCorner(Corner aCorner,
nsCellMap& aCellMap,
PRUint32 aCellMapStart,
PRUint32 aYPos,
PRUint32 aXPos,
PRUint8 aOwner,
nscoord aSubSize,
PRBool aBevel,
PRBool aIsBottomRight = PR_FALSE);
/** dump a representation of the cell map to stdout for debugging */
#ifdef NS_DEBUG
void Dump(char* aString = nsnull) const;
#endif
protected:
BCData* GetRightMostBorder(PRInt32 aRowIndex);
BCData* GetBottomMostBorder(PRInt32 aColIndex);
friend class nsCellMap;
friend class BCMapCellIterator;
friend class BCMapBorderIterator;
void InsertGroupCellMap(nsCellMap* aPrevMap,
nsCellMap& aNewMap);
void DeleteRightBottomBorders();
nsTableFrame& mTableFrame;
nsAutoVoidArray mCols;
nsCellMap* mFirstMap;
// border collapsing info
BCInfo* mBCInfo;
};
/** 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;
/** append the cellFrame at an empty or dead cell or finally at the end of
* the row at aRowIndex and return a pointer to the celldata entry in the
* cellmap
*
* @param aMap - reference to the table cell map
* @param aCellFrame - a pointer to the cellframe which will be appended
* to the row
* @param aRowIndex - to this row the celldata entry will be added
* @param aRebuildIfNecessay - if a cell spans into a row below it might be
* necesserary to rebuild the cellmap as this rowspan
* might overlap another cell.
* @param aDamageArea - area in cellmap coordinates which have been updated.
* @param aColToBeginSearch - if not null contains the column number where
* the search for a empty or dead cell in the
* row should start
* @return - a pointer to the celldata entry inserted into
* the cellmap
*/
CellData* AppendCell(nsTableCellMap& aMap,
nsTableCellFrame* aCellFrame,
PRInt32 aRowIndex,
PRBool aRebuildIfNecessary,
nsRect& aDamageArea,
PRInt32* aBeginSearchAtCol = nsnull);
void InsertCells(nsTableCellMap& aMap,
nsVoidArray& aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndexBefore,
nsRect& aDamageArea);
void RemoveCell(nsTableCellMap& aMap,
nsTableCellFrame* aCellFrame,
PRInt32 aRowIndex,
nsRect& aDamageArea);
void InsertRows(nsTableCellMap& aMap,
nsVoidArray& aRows,
PRInt32 aFirstRowIndex,
PRBool aConsiderSpans,
nsRect& aDamageArea);
void RemoveRows(nsTableCellMap& aMap,
PRInt32 aFirstRowIndex,
PRInt32 aNumRowsToRemove,
PRBool aConsiderSpans,
nsRect& aDamageArea);
PRInt32 GetNumCellsOriginatingInRow(PRInt32 aRowIndex) const;
PRInt32 GetNumCellsOriginatingInCol(PRInt32 aColIndex) const;
/** return the number of rows in the table represented by this CellMap */
PRInt32 GetRowCount(PRBool aConsiderDeadRowSpanRows = PR_FALSE) 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 ColHasSpanningCells(nsTableCellMap& aMap,
PRInt32 aColIndex);
PRInt32 GetRowSpan(nsTableCellMap& aMap,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRBool aGetEffective,
PRBool& aIsZeroRowSpan);
PRInt32 GetEffectiveColSpan(nsTableCellMap& aMap,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRBool& aIsZeroColSpan);
/** dump a representation of the cell map to stdout for debugging */
#ifdef NS_DEBUG
void Dump(PRBool aIsBorderCollapse) const;
#endif
protected:
friend class nsTableCellMap;
friend class BCMapCellIterator;
friend class BCMapBorderIterator;
friend class nsTableFrame;
PRBool Grow(nsTableCellMap& aMap,
PRInt32 aNumRows,
PRInt32 aRowIndex = -1);
void GrowRow(nsVoidArray& aRow,
PRInt32 aNumCols);
/** assign aCellData to the cell at (aRow,aColumn) */
void SetDataAt(nsTableCellMap& aMap,
CellData& aCellData,
PRInt32 aMapRowIndex,
PRInt32 aColIndex,
PRBool aCountZeroSpanAsSpan);
CellData* GetDataAt(nsTableCellMap& aMap,
PRInt32 aMapRowIndex,
PRInt32 aColIndex,
PRBool aUpdateZeroSpan);
PRInt32 GetNumCellsIn(PRInt32 aColIndex) const;
void ExpandWithRows(nsTableCellMap& aMap,
nsVoidArray& aRowFrames,
PRInt32 aStartRowIndex,
nsRect& aDamageArea);
void ExpandWithCells(nsTableCellMap& aMap,
nsVoidArray& aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRInt32 aRowSpan,
PRBool aRowSpanIsZero,
nsRect& aDamageArea);
void ShrinkWithoutRows(nsTableCellMap& aMap,
PRInt32 aFirstRowIndex,
PRInt32 aNumRowsToRemove,
nsRect& aDamageArea);
void ShrinkWithoutCell(nsTableCellMap& aMap,
nsTableCellFrame& aCellFrame,
PRInt32 aRowIndex,
PRInt32 aColIndex,
nsRect& aDamageArea);
void RebuildConsideringRows(nsTableCellMap& aMap,
PRInt32 aStartRowIndex,
nsVoidArray* aRowsToInsert,
PRInt32 aNumRowsToRemove,
nsRect& aDamageArea);
void RebuildConsideringCells(nsTableCellMap& aMap,
nsVoidArray* aCellFrames,
PRInt32 aRowIndex,
PRInt32 aColIndex,
PRBool aInsert,
nsRect& aDamageArea);
PRBool CellsSpanOut(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 GetRowSpanForNewCell(nsTableCellFrame& aCellFrameToAdd,
PRInt32 aRowIndex,
PRBool& aIsZeroRowSpan);
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 */
nsAutoVoidArray 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(PRBool aConsiderDeadRowSpanRows) const
{
PRInt32 rowCount = (aConsiderDeadRowSpanRows) ? mRows.Count() : mRowCount;
return rowCount;
}
// nsColInfo
inline nsColInfo::nsColInfo()
:mNumCellsOrig(0), mNumCellsSpan(0)
{}
inline nsColInfo::nsColInfo(PRInt32 aNumCellsOrig,
PRInt32 aNumCellsSpan)
:mNumCellsOrig(aNumCellsOrig), mNumCellsSpan(aNumCellsSpan)
{}
#endif