gecko-dev/layout/tables/FixedTableLayoutStrategy.h

113 lines
4.4 KiB
C++

/* -*- 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
*
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*
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* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
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* Contributor(s):
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#ifndef FixedTableLayoutStrategy_h__
#define FixedTableLayoutStrategy_h__
#include "nscore.h"
#include "BasicTableLayoutStrategy.h"
#include "nsCoord.h"
class nsVoidArray;
class nsTableFrame;
struct nsStylePosition;
/* ---------- FixedTableLayoutStrategy ---------- */
/** Implementation of HTML4 "table-layout=fixed" table layout.
* The input to this class is the resolved styles for both the
* table columns and the cells in row0.
* The output from this class is to set the column widths in
* mTableFrame.
*/
class FixedTableLayoutStrategy : public BasicTableLayoutStrategy
{
public:
/** Public constructor.
* @paran aFrame the table frame for which this delegate will do layout
* @param aNumCols the total number of columns in the table
*/
FixedTableLayoutStrategy(nsTableFrame *aFrame);
/** destructor */
virtual ~FixedTableLayoutStrategy();
/** Called during resize reflow to determine the new column widths
* @param aTableStyle - the resolved style for mTableFrame
* @param aReflowState - the reflow state for mTableFrame
* @param aMaxWidth - the computed max width for columns to fit into
*/
virtual PRBool BalanceColumnWidths(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState);
virtual nscoord CalcPctAdjTableWidth(const nsHTMLReflowState& aReflowState,
nscoord aAvailWidth,
float aPixelToTwips) {return 0;};
#ifdef DEBUG
void SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const {
*aResult = sizeof(*this);
}
#endif
protected:
/* assign the width of all columns
* if there is a colframe with a width attribute, use it as the column width.
* otherwise if there is a cell in the first row and it has a width attribute, use it.
* if this cell includes a colspan, width is divided equally among spanned columns
* otherwise the cell get a proportion of the remaining space.
* as determined by the table width attribute. If no table width attribute, it gets 0 width
* Computes the minimum and maximum table widths.
*
* Set column width information in each column frame and in the table frame.
*
* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
*
*/
virtual PRBool AssignNonPctColumnWidths(nsIPresContext* aPresContext,
nscoord aComputedWidth,
const nsHTMLReflowState& aReflowState,
float aPixelToTwips);
};
#endif