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507 lines
15 KiB
C++
507 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef CellData_h__
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#define CellData_h__
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#include "nsISupports.h"
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#include "nsCoord.h"
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#include "gfxCore.h"
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class nsTableCellFrame;
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class nsCellMap;
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class BCCellData;
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#define MAX_ROWSPAN 8190 // the cellmap can not handle more
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#define MAX_COLSPAN 1000 // limit as IE and opera do
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/**
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* Data stored by nsCellMap to rationalize rowspan and colspan cells.
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*/
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class CellData
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{
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public:
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/** Initialize the mOrigCell pointer
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* @param aOrigCell the table cell frame which will be stored in mOrigCell.
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*/
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void Init(nsTableCellFrame* aCellFrame);
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/** does a cell originate from here
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* @return is true if a cell corresponds to this cellmap entry
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*/
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PRBool IsOrig() const;
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/** is the celldata valid
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* @return is true if no cell originates and the cell is not spanned by
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* a row- or colspan. mBits are 0 in this case and mOrigCell is
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* nsnull
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*/
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PRBool IsDead() const;
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/** is the entry spanned by row- or a colspan
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* @return is true if the entry is spanned by a row- or colspan
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*/
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PRBool IsSpan() const;
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/** is the entry spanned by rowspan
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* @return is true if the entry is spanned by a rowspan
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*/
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PRBool IsRowSpan() const;
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/** is the entry spanned by a zero rowspan
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* zero rowspans span all cells starting from the originating cell down to
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* the end of the rowgroup or a cell originating in the same column
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* @return is true if the entry is spanned by a zero rowspan
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*/
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PRBool IsZeroRowSpan() const;
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/** mark the current entry as spanned by a zero rowspan
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* @param aIsZero if true mark the entry as covered by a zero rowspan
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*/
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void SetZeroRowSpan(PRBool aIsZero);
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/** get the distance from the current entry to the corresponding origin of the rowspan
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* @return containing the distance in the column to the originating cell
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*/
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PRUint32 GetRowSpanOffset() const;
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/** set the distance from the current entry to the corresponding origin of the rowspan
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* @param the distance in the column to the originating cell
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*/
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void SetRowSpanOffset(PRUint32 aSpan);
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/** is the entry spanned by colspan
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* @return is true if the entry is spanned by a colspan
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*/
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PRBool IsColSpan() const;
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/** is the entry spanned by a zero colspan
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* zero colspans span all cells starting from the originating cell towards
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* the end of the colgroup or a cell originating in the same row
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* or a rowspanned entry
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* @return is true if the entry is spanned by a zero colspan
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*/
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PRBool IsZeroColSpan() const;
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/** mark the current entry as spanned by a zero colspan
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* @param aIsZero if true mark the entry as covered by a zero colspan
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*/
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void SetZeroColSpan(PRBool aIsZero);
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/** get the distance from the current entry to the corresponding origin of the colspan
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* @return containing the distance in the row to the originating cell
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*/
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PRUint32 GetColSpanOffset() const;
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/** set the distance from the current entry to the corresponding origin of the colspan
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* @param the distance in the column to the originating cell
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*/
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void SetColSpanOffset(PRUint32 aSpan);
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/** is the entry spanned by a row- and a colspan
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* @return is true if the entry is spanned by a row- and a colspan
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*/
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PRBool IsOverlap() const;
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/** mark the current entry as spanned by a row- and a colspan
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* @param aOverlap if true mark the entry as covered by a row- and a colspan
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*/
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void SetOverlap(PRBool aOverlap);
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/** get the table cell frame for this entry
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* @return a pointer to the cellframe, this will be nsnull when the entry
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* is only a spanned entry
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*/
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nsTableCellFrame* GetCellFrame() const;
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private:
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friend class nsCellMap;
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friend class BCCellData;
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/** constructor.
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* @param aOrigCell the table cell frame which will be stored in mOrigCell.
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*/
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CellData(nsTableCellFrame* aOrigCell); // implemented in nsCellMap.cpp
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/** destructor */
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~CellData(); // implemented in nsCellMap.cpp
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protected:
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// this union relies on the assumption that an object (not primitive type) does
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// not start on an odd bit boundary. If mSpan is 0 then mOrigCell is in effect
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// and the data does not represent a span. If mSpan is 1, then mBits is in
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// effect and the data represents a span.
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// mBits must be an unsigned long because it must match the size of
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// mOrigCell on both 32- and 64-bit platforms.
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union {
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nsTableCellFrame* mOrigCell;
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unsigned long mBits;
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};
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};
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// Border Collapsing Cell Data
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enum BCBorderOwner
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{
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eTableOwner = 0,
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eColGroupOwner = 1,
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eAjaColGroupOwner = 2, // col group to the left
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eColOwner = 3,
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eAjaColOwner = 4, // col to the left
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eRowGroupOwner = 5,
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eAjaRowGroupOwner = 6, // row group above
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eRowOwner = 7,
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eAjaRowOwner = 8, // row above
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eCellOwner = 9,
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eAjaCellOwner = 10 // cell to the top or to the left
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};
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typedef PRUint16 BCPixelSize;
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// These are the max sizes that are stored. If they are exceeded, then the max is stored and
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// the actual value is computed when needed.
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#define MAX_BORDER_WIDTH nscoord(PR_BITMASK(sizeof(BCPixelSize) * 8))
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static inline nscoord
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BC_BORDER_TOP_HALF_COORD(PRInt32 p2t, PRUint16 px) { return (px - px / 2) * p2t; }
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static inline nscoord
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BC_BORDER_RIGHT_HALF_COORD(PRInt32 p2t, PRUint16 px) { return ( px / 2) * p2t; }
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static inline nscoord
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BC_BORDER_BOTTOM_HALF_COORD(PRInt32 p2t, PRUint16 px) { return ( px / 2) * p2t; }
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static inline nscoord
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BC_BORDER_LEFT_HALF_COORD(PRInt32 p2t, PRUint16 px) { return (px - px / 2) * p2t; }
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#define BC_BORDER_TOP_HALF(px) ((px) - (px) / 2)
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#define BC_BORDER_RIGHT_HALF(px) ((px) / 2)
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#define BC_BORDER_BOTTOM_HALF(px) ((px) / 2)
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#define BC_BORDER_LEFT_HALF(px) ((px) - (px) / 2)
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// BCData stores the top and left border info and the corner connecting the two.
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class BCData
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{
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public:
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BCData();
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~BCData();
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nscoord GetLeftEdge(BCBorderOwner& aOwner,
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PRBool& aStart) const;
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void SetLeftEdge(BCBorderOwner aOwner,
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nscoord aSize,
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PRBool aStart);
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nscoord GetTopEdge(BCBorderOwner& aOwner,
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PRBool& aStart) const;
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void SetTopEdge(BCBorderOwner aOwner,
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nscoord aSize,
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PRBool aStart);
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BCPixelSize GetCorner(mozilla::css::Side& aCornerOwner,
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PRPackedBool& aBevel) const;
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void SetCorner(BCPixelSize aSubSize,
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mozilla::css::Side aOwner,
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PRBool aBevel);
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PRBool IsLeftStart() const;
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void SetLeftStart(PRBool aValue);
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PRBool IsTopStart() const;
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void SetTopStart(PRBool aValue);
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protected:
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BCPixelSize mLeftSize; // size in pixels of left border
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BCPixelSize mTopSize; // size in pixels of top border
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BCPixelSize mCornerSubSize; // size of the largest border not in the
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// dominant plane (for example, if corner is
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// owned by the segment to its top or bottom,
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// then the size is the max of the border
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// sizes of the segments to its left or right.
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unsigned mLeftOwner: 4; // owner of left border
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unsigned mTopOwner: 4; // owner of top border
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unsigned mLeftStart: 1; // set if this is the start of a vertical border segment
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unsigned mTopStart: 1; // set if this is the start of a horizontal border segment
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unsigned mCornerSide: 2; // mozilla::css::Side of the owner of the upper left corner relative to the corner
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unsigned mCornerBevel: 1; // is the corner beveled (only two segments, perpendicular, not dashed or dotted).
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};
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// BCCellData entries replace CellData entries in the cell map if the border collapsing model is in
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// effect. BCData for a row and col entry contains the left and top borders of cell at that row and
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// col and the corner connecting the two. The right borders of the cells in the last col and the bottom
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// borders of the last row are stored in separate BCData entries in the cell map.
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class BCCellData : public CellData
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{
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public:
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BCCellData(nsTableCellFrame* aOrigCell);
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~BCCellData();
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BCData mData;
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};
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#define SPAN 0x00000001 // there a row or col span
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#define ROW_SPAN 0x00000002 // there is a row span
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#define ROW_SPAN_0 0x00000004 // the row span is 0
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#define ROW_SPAN_OFFSET 0x0000FFF8 // the row offset to the data containing the original cell
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#define COL_SPAN 0x00010000 // there is a col span
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#define COL_SPAN_0 0x00020000 // the col span is 0
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#define OVERLAP 0x00040000 // there is a row span and col span but no by same cell
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#define COL_SPAN_OFFSET 0xFFF80000 // the col offset to the data containing the original cell
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#define ROW_SPAN_SHIFT 3 // num bits to shift to get right justified row span
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#define COL_SPAN_SHIFT 19 // num bits to shift to get right justified col span
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inline nsTableCellFrame* CellData::GetCellFrame() const
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{
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if (SPAN != (SPAN & mBits)) {
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return mOrigCell;
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}
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return nsnull;
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}
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inline void CellData::Init(nsTableCellFrame* aCellFrame)
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{
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mOrigCell = aCellFrame;
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}
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inline PRBool CellData::IsOrig() const
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{
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return ((nsnull != mOrigCell) && (SPAN != (SPAN & mBits)));
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}
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inline PRBool CellData::IsDead() const
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{
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return (0 == mBits);
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}
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inline PRBool CellData::IsSpan() const
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{
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return (SPAN == (SPAN & mBits));
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}
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inline PRBool CellData::IsRowSpan() const
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{
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return (SPAN == (SPAN & mBits)) &&
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(ROW_SPAN == (ROW_SPAN & mBits));
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}
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inline PRBool CellData::IsZeroRowSpan() const
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{
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return (SPAN == (SPAN & mBits)) &&
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(ROW_SPAN == (ROW_SPAN & mBits)) &&
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(ROW_SPAN_0 == (ROW_SPAN_0 & mBits));
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}
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inline void CellData::SetZeroRowSpan(PRBool aIsZeroSpan)
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{
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if (SPAN == (SPAN & mBits)) {
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if (aIsZeroSpan) {
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mBits |= ROW_SPAN_0;
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}
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else {
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mBits &= ~ROW_SPAN_0;
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}
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}
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}
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inline PRUint32 CellData::GetRowSpanOffset() const
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{
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if ((SPAN == (SPAN & mBits)) && ((ROW_SPAN == (ROW_SPAN & mBits)))) {
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return (PRUint32)((mBits & ROW_SPAN_OFFSET) >> ROW_SPAN_SHIFT);
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}
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return 0;
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}
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inline void CellData::SetRowSpanOffset(PRUint32 aSpan)
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{
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mBits &= ~ROW_SPAN_OFFSET;
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mBits |= (aSpan << ROW_SPAN_SHIFT);
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mBits |= SPAN;
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mBits |= ROW_SPAN;
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}
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inline PRBool CellData::IsColSpan() const
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{
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return (SPAN == (SPAN & mBits)) &&
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(COL_SPAN == (COL_SPAN & mBits));
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}
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inline PRBool CellData::IsZeroColSpan() const
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{
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return (SPAN == (SPAN & mBits)) &&
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(COL_SPAN == (COL_SPAN & mBits)) &&
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(COL_SPAN_0 == (COL_SPAN_0 & mBits));
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}
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inline void CellData::SetZeroColSpan(PRBool aIsZeroSpan)
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{
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if (SPAN == (SPAN & mBits)) {
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if (aIsZeroSpan) {
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mBits |= COL_SPAN_0;
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}
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else {
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mBits &= ~COL_SPAN_0;
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}
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}
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}
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inline PRUint32 CellData::GetColSpanOffset() const
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{
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if ((SPAN == (SPAN & mBits)) && ((COL_SPAN == (COL_SPAN & mBits)))) {
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return (PRUint32)((mBits & COL_SPAN_OFFSET) >> COL_SPAN_SHIFT);
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}
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return 0;
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}
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inline void CellData::SetColSpanOffset(PRUint32 aSpan)
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{
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mBits &= ~COL_SPAN_OFFSET;
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mBits |= (aSpan << COL_SPAN_SHIFT);
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mBits |= SPAN;
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mBits |= COL_SPAN;
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}
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inline PRBool CellData::IsOverlap() const
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{
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return (SPAN == (SPAN & mBits)) && (OVERLAP == (OVERLAP & mBits));
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}
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inline void CellData::SetOverlap(PRBool aOverlap)
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{
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if (SPAN == (SPAN & mBits)) {
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if (aOverlap) {
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mBits |= OVERLAP;
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}
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else {
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mBits &= ~OVERLAP;
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}
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}
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}
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inline BCData::BCData()
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{
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mLeftOwner = mTopOwner = eCellOwner;
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mLeftStart = mTopStart = 1;
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mLeftSize = mCornerSubSize = mTopSize = 0;
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mCornerSide = NS_SIDE_TOP;
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mCornerBevel = PR_FALSE;
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}
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inline BCData::~BCData()
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{
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}
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inline nscoord BCData::GetLeftEdge(BCBorderOwner& aOwner,
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PRBool& aStart) const
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{
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aOwner = (BCBorderOwner)mLeftOwner;
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aStart = (PRBool)mLeftStart;
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return (nscoord)mLeftSize;
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}
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inline void BCData::SetLeftEdge(BCBorderOwner aOwner,
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nscoord aSize,
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PRBool aStart)
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{
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mLeftOwner = aOwner;
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mLeftSize = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
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mLeftStart = aStart;
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}
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inline nscoord BCData::GetTopEdge(BCBorderOwner& aOwner,
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PRBool& aStart) const
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{
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aOwner = (BCBorderOwner)mTopOwner;
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aStart = (PRBool)mTopStart;
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return (nscoord)mTopSize;
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}
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inline void BCData::SetTopEdge(BCBorderOwner aOwner,
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nscoord aSize,
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PRBool aStart)
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{
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mTopOwner = aOwner;
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mTopSize = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
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mTopStart = aStart;
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}
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inline BCPixelSize BCData::GetCorner(mozilla::css::Side& aOwnerSide,
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PRPackedBool& aBevel) const
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{
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aOwnerSide = mozilla::css::Side(mCornerSide);
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aBevel = (PRBool)mCornerBevel;
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return mCornerSubSize;
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}
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inline void BCData::SetCorner(BCPixelSize aSubSize,
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mozilla::css::Side aOwnerSide,
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PRBool aBevel)
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{
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mCornerSubSize = aSubSize;
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mCornerSide = aOwnerSide;
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mCornerBevel = aBevel;
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}
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inline PRBool BCData::IsLeftStart() const
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{
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return (PRBool)mLeftStart;
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}
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inline void BCData::SetLeftStart(PRBool aValue)
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{
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mLeftStart = aValue;
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}
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inline PRBool BCData::IsTopStart() const
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{
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return (PRBool)mTopStart;
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}
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inline void BCData::SetTopStart(PRBool aValue)
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{
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mTopStart = aValue;
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}
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#endif
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