gecko-dev/layout/tables/nsITableLayout.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 of 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 nsITableLayout_h__
#define nsITableLayout_h__
#include "nsQueryFrame.h"
class nsIDOMElement;
/**
* nsITableLayout
* interface for layout objects that act like tables.
* initially, we use this to get cell info
*
* @author sclark
*/
class nsITableLayout
{
public:
NS_DECL_QUERYFRAME_TARGET(nsITableLayout)
/** return all the relevant layout information about a cell.
* @param aRowIndex a row which the cell intersects
* @param aColIndex a col which the cell intersects
* @param aCell [OUT] the content representing the cell at (aRowIndex, aColIndex)
* @param aStartRowIndex [IN/OUT] the row in which aCell starts
* @param aStartColIndex [IN/OUT] the col in which aCell starts
* Initialize these with the "candidate" start indexes to use
* for searching through the table when a cell isn't found
* because of "holes" in the cellmap
* when ROWSPAN and/or COLSPAN > 1
* @param aRowSpan [OUT] the value of the ROWSPAN attribute (may be 0 or actual number)
* @param aColSpan [OUT] the value of the COLSPAN attribute (may be 0 or actual number)
* @param aActualRowSpan [OUT] the actual number of rows aCell spans
* @param aActualColSpan [OUT] the acutal number of cols aCell spans
* @param aIsSelected [OUT] true if the frame that maps aCell is selected
* in the presentation shell that owns this.
*/
NS_IMETHOD GetCellDataAt(PRInt32 aRowIndex, PRInt32 aColIndex,
nsIDOMElement* &aCell, //out params
PRInt32& aStartRowIndex, PRInt32& aStartColIndex,
PRInt32& aRowSpan, PRInt32& aColSpan,
PRInt32& aActualRowSpan, PRInt32& aActualColSpan,
bool& aIsSelected)=0;
/** Get the number of rows and column for a table from the frame's cellmap
* Some rows may not have enough cells (the number returned is the maximum possible),
* which displays as a ragged-right edge table
*/
NS_IMETHOD GetTableSize(PRInt32& aRowCount, PRInt32& aColCount)=0;
/**
* Retrieves the index of the cell at the given coordinates.
*
* @note The index is the order number of the cell calculated from top left
* cell to the right bottom cell of the table.
*
* @param aRow [in] the row the cell is in
* @param aColumn [in] the column the cell is in
* @param aIndex [out] the index to be returned
*/
NS_IMETHOD GetIndexByRowAndColumn(PRInt32 aRow, PRInt32 aColumn,
PRInt32 *aIndex) = 0;
/**
* Retrieves the coordinates of the cell at the given index.
*
* @see nsITableLayout::GetIndexByRowAndColumn()
*
* @param aIndex [in] the index for which the coordinates are to be retrieved
* @param aRow [out] the resulting row coordinate
* @param aColumn [out] the resulting column coordinate
*/
NS_IMETHOD GetRowAndColumnByIndex(PRInt32 aIndex,
PRInt32 *aRow, PRInt32 *aColumn) = 0;
};
#endif