gecko-dev/layout/tables/celldata.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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*
* 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"),
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#ifndef CellData_h__
#define CellData_h__
#include "nsISupports.h"
#include "nsCoord.h"
class nsTableCellFrame;
/**
* Data stored by nsCellMap to rationalize rowspan and colspan cells.
*/
class CellData
{
public:
CellData(nsTableCellFrame* aOrigCell);
~CellData();
void Init(nsTableCellFrame* aCellFrame);
PRBool IsOrig() const;
PRBool IsDead() const;
PRBool IsSpan() const;
PRBool IsRowSpan() const;
PRBool IsZeroRowSpan() const;
void SetZeroRowSpan(PRBool aIsZero);
PRUint32 GetRowSpanOffset() const;
void SetRowSpanOffset(PRUint32 aSpan);
PRBool IsColSpan() const;
PRBool IsZeroColSpan() const;
void SetZeroColSpan(PRBool aIsZero);
PRUint32 GetColSpanOffset() const;
void SetColSpanOffset(PRUint32 aSpan);
PRBool IsOverlap() const;
void SetOverlap(PRBool aOverlap);
nsTableCellFrame* GetCellFrame() const;
protected:
// this union relies on the assumption that an object (not primitive type) does
// not start on an odd bit boundary. If mSpan is 0 then mOrigCell is in effect
// and the data does not represent a span. If mSpan is 1, then mBits is in
// effect and the data represents a span.
union {
nsTableCellFrame* mOrigCell;
long mBits;
};
};
// Border Collapsing Cell Data
enum BCBorderOwner
{
eTableOwner = 0,
eColGroupOwner = 1,
eAjaColGroupOwner = 2, // col group to the left
eColOwner = 3,
eAjaColOwner = 4, // col to the left
eRowGroupOwner = 5,
eAjaRowGroupOwner = 6, // row group above
eRowOwner = 7,
eAjaRowOwner = 8, // row above
eCellOwner = 9,
eAjaCellOwner = 10 // cell to the top or to the left
};
// These are the max sizes that are stored. If they are exceeded, then the max is stored and
// the actual value is computed when needed.
#define MAX_BORDER_WIDTH 64
#define MAX_CORNER_SUB_WIDTH 128
// BCData stores the top and left border info and the corner connecting the two.
class BCData
{
public:
BCData();
~BCData();
nscoord GetLeftEdge(BCBorderOwner& aOwner,
PRBool& aStart) const;
void SetLeftEdge(BCBorderOwner aOwner,
nscoord aSize,
PRBool aStart);
nscoord GetTopEdge(BCBorderOwner& aOwner,
PRBool& aStart) const;
void SetTopEdge(BCBorderOwner aOwner,
nscoord aSize,
PRBool aStart);
PRUint8 GetCorner(PRUint8& aCornerOwner,
PRPackedBool& aBevel) const;
void SetCorner(PRUint8 aOwner,
PRUint8 aSubSize,
PRBool aBevel);
PRBool IsLeftStart() const;
void SetLeftStart(PRBool aValue);
PRBool IsTopStart() const;
void SetTopStart(PRBool aValue);
protected:
unsigned mLeftOwner: 4; // owner of left border
unsigned mLeftSize: 6; // size in pixels of left border
unsigned mLeftStart: 1; // set if this is the start of a vertical border segment
unsigned mCornerSide: 2; // side of the owner of the upper left corner relative to the corner
unsigned mCornerSubSize: 7; // size of the largest border not in the dominate plane (for example, if
// corner is owned by the segment to its top or bottom, then the size is the
// max of the border sizes of the segments to its left or right.
unsigned mCornerBevel: 1; // is the corner beveled (only two segments, perpendicular, not dashed or dotted).
unsigned mTopOwner: 4; // owner of top border
unsigned mTopSize: 6; // size in pixels of top border
unsigned mTopStart: 1; // set if this is the start of a horizontal border segment
};
// BCCellData entries replace CellData entries in the cell map if the border collapsing model is in
// effect. BCData for a row and col entry contains the left and top borders of cell at that row and
// col and the corner connecting the two. The right borders of the cells in the last col and the bottom
// borders of the last row are stored in separate BCData entries in the cell map.
class BCCellData : public CellData
{
public:
BCCellData(nsTableCellFrame* aOrigCell);
~BCCellData();
BCData mData;
};
#define SPAN 0x00000001 // there a row or col span
#define ROW_SPAN 0x00000002 // there is a row span
#define ROW_SPAN_0 0x00000004 // the row span is 0
#define ROW_SPAN_OFFSET 0x0000FFF8 // the row offset to the data containing the original cell
#define COL_SPAN 0x00010000 // there is a col span
#define COL_SPAN_0 0x00020000 // the col span is 0
#define OVERLAP 0x00040000 // there is a row span and col span but no by same cell
#define COL_SPAN_OFFSET 0xFFF80000 // the col offset to the data containing the original cell
#define ROW_SPAN_SHIFT 3 // num bits to shift to get right justified col span
#define COL_SPAN_SHIFT 19 // num bits to shift to get right justified col span
inline nsTableCellFrame* CellData::GetCellFrame() const
{
if (SPAN != (SPAN & mBits)) {
return mOrigCell;
}
return nsnull;
}
inline void CellData::Init(nsTableCellFrame* aCellFrame)
{
mOrigCell = aCellFrame;
}
inline PRBool CellData::IsOrig() const
{
return ((nsnull != mOrigCell) && (SPAN != (SPAN & mBits)));
}
inline PRBool CellData::IsDead() const
{
return (0 == mBits);
}
inline PRBool CellData::IsSpan() const
{
return (SPAN == (SPAN & mBits));
}
inline PRBool CellData::IsRowSpan() const
{
return (SPAN == (SPAN & mBits)) &&
(ROW_SPAN == (ROW_SPAN & mBits));
}
inline PRBool CellData::IsZeroRowSpan() const
{
return (SPAN == (SPAN & mBits)) &&
(ROW_SPAN == (ROW_SPAN & mBits)) &&
(ROW_SPAN_0 == (ROW_SPAN_0 & mBits));
}
inline void CellData::SetZeroRowSpan(PRBool aIsZeroSpan)
{
if (SPAN == (SPAN & mBits)) {
if (aIsZeroSpan) {
mBits |= ROW_SPAN_0;
}
else {
mBits &= ~ROW_SPAN_0;
}
}
}
inline PRUint32 CellData::GetRowSpanOffset() const
{
if ((SPAN == (SPAN & mBits)) && ((ROW_SPAN == (ROW_SPAN & mBits)))) {
return (PRUint32)((mBits & ROW_SPAN_OFFSET) >> ROW_SPAN_SHIFT);
}
return 0;
}
inline void CellData::SetRowSpanOffset(PRUint32 aSpan)
{
mBits &= ~ROW_SPAN_OFFSET;
mBits |= (aSpan << ROW_SPAN_SHIFT);
mBits |= SPAN;
mBits |= ROW_SPAN;
}
inline PRBool CellData::IsColSpan() const
{
return (SPAN == (SPAN & mBits)) &&
(COL_SPAN == (COL_SPAN & mBits));
}
inline PRBool CellData::IsZeroColSpan() const
{
return (SPAN == (SPAN & mBits)) &&
(COL_SPAN == (COL_SPAN & mBits)) &&
(COL_SPAN_0 == (COL_SPAN_0 & mBits));
}
inline void CellData::SetZeroColSpan(PRBool aIsZeroSpan)
{
if (SPAN == (SPAN & mBits)) {
if (aIsZeroSpan) {
mBits |= COL_SPAN_0;
}
else {
mBits &= ~COL_SPAN_0;
}
}
}
inline PRUint32 CellData::GetColSpanOffset() const
{
if ((SPAN == (SPAN & mBits)) && ((COL_SPAN == (COL_SPAN & mBits)))) {
return (PRUint32)((mBits & COL_SPAN_OFFSET) >> COL_SPAN_SHIFT);
}
return 0;
}
inline void CellData::SetColSpanOffset(PRUint32 aSpan)
{
mBits &= ~COL_SPAN_OFFSET;
mBits |= (aSpan << COL_SPAN_SHIFT);
mBits |= SPAN;
mBits |= COL_SPAN;
}
inline PRBool CellData::IsOverlap() const
{
return (SPAN == (SPAN & mBits)) && (OVERLAP == (OVERLAP & mBits));
}
inline void CellData::SetOverlap(PRBool aOverlap)
{
if (SPAN == (SPAN & mBits)) {
if (aOverlap) {
mBits |= OVERLAP;
}
else {
mBits &= ~OVERLAP;
}
}
}
inline BCData::BCData()
{
mLeftOwner = mTopOwner = eCellOwner;
mLeftStart = mTopStart = 1;
mLeftSize = mCornerSide = mCornerSubSize = mTopSize = 0;
}
inline BCData::~BCData()
{
}
inline nscoord BCData::GetLeftEdge(BCBorderOwner& aOwner,
PRBool& aStart) const
{
aOwner = (BCBorderOwner)mLeftOwner;
aStart = (PRBool)mLeftStart;
return (nscoord)mLeftSize;
}
inline void BCData::SetLeftEdge(BCBorderOwner aOwner,
nscoord aSize,
PRBool aStart)
{
mLeftOwner = aOwner;
mLeftSize = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
mLeftStart = aStart;
}
inline nscoord BCData::GetTopEdge(BCBorderOwner& aOwner,
PRBool& aStart) const
{
aOwner = (BCBorderOwner)mTopOwner;
aStart = (PRBool)mTopStart;
return (nscoord)mTopSize;
}
inline void BCData::SetTopEdge(BCBorderOwner aOwner,
nscoord aSize,
PRBool aStart)
{
mTopOwner = aOwner;
mTopSize = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
mTopStart = aStart;
}
inline PRUint8 BCData::GetCorner(PRUint8& aOwnerSide,
PRPackedBool& aBevel) const
{
aOwnerSide = mCornerSide;
aBevel = (PRBool)mCornerBevel;
return (PRUint8)mCornerSubSize;
}
inline void BCData::SetCorner(PRUint8 aSubSize,
PRUint8 aOwnerSide,
PRBool aBevel)
{
mCornerSubSize = (aSubSize > MAX_CORNER_SUB_WIDTH) ? MAX_CORNER_SUB_WIDTH : aSubSize;
mCornerSide = aOwnerSide;
mCornerBevel = aBevel;
}
inline PRBool BCData::IsLeftStart() const
{
return (PRBool)mLeftStart;
}
inline void BCData::SetLeftStart(PRBool aValue)
{
mLeftStart = aValue;
}
inline PRBool BCData::IsTopStart() const
{
return (PRBool)mTopStart;
}
inline void BCData::SetTopStart(PRBool aValue)
{
mTopStart = aValue;
}
#endif