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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):
* buster@netscape.com
*
* 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
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef BasicTableLayoutStrategy_h__
#define BasicTableLayoutStrategy_h__
#include "nscore.h"
#include "nsITableLayoutStrategy.h"
#include "nsCoord.h"
class nsVoidArray;
class nsTableFrame;
struct nsStylePosition;
struct nsStyleTable;
static const PRInt32 kUninitialized=-1;
/* ---------- BasicTableLayoutStrategy ---------- */
/** Implementation of Nav4 compatible HTML browser table layout.
* The input to this class is the results from pass1 table layout.
* The output from this class is to set the column widths in
* mTableFrame.
*/
class BasicTableLayoutStrategy : public nsITableLayoutStrategy
{
public:
/** Public constructor.
* @paran aFrame - the table frame for which this delegate will do layout
* @param aIsNavQuirksMode - honor NN4x table quirks
*/
BasicTableLayoutStrategy(nsTableFrame *aFrame,
PRBool aIsNavQuirksMode = PR_TRUE);
/** destructor */
virtual ~BasicTableLayoutStrategy();
/** call every time any table thing changes that might effect the width of any column
* in the table (content, structure, or style)
* @param aReflowState - the reflow state for mTableFrame
*/
virtual PRBool Initialize(const nsHTMLReflowState& aReflowState);
/** Called during resize reflow to determine the new column widths
* @param aReflowState - the reflow state for mTableFrame
*/
virtual PRBool BalanceColumnWidths(const nsHTMLReflowState& aReflowState);
/**
* Calculate the basis for percent width calculations of the table elements
* @param aReflowState - the reflow state of the table
* @param aAvailWidth - the available width for the table
* @return - the basis for percent calculations
*/
virtual nscoord CalcPctAdjTableWidth(const nsHTMLReflowState& aReflowState,
nscoord aAvailWidth);
void Dump(PRInt32 aIndent);
protected:
/** assign widths for each column.
* if the column has a fixed coord width, use it.
* if the column includes col spanning cells,
* then distribute the fixed space between cells proportionately.
* Computes the minimum and maximum table widths.
* Set column width information in each column frame and in the table frame.
*
* @return PR_TRUE has a pct cell or col, PR_FALSE otherwise
*/
virtual PRBool AssignNonPctColumnWidths(nscoord aComputedWidth,
const nsHTMLReflowState& aReflowState);
/**
* Calculate the adjusted widths (min, desired, fixed, or pct) for a cell
* spanning multiple columns.
* @param aReflowState - the reflow state of the table
* @param aConsiderPct - if true, consider columns that have pct widths and are spanned by the cell
* @param aPixelToTwips- the number of twips in a pixel.
* @param aHasPctCol - if not null, then set *aHasPctCol to true if there is a pct cell or col
*/
void ComputeNonPctColspanWidths(const nsHTMLReflowState& aReflowState,
PRBool aConsiderPct,
float aPixelToTwips,
PRBool* aHasPctCol);
/**
* main helper for above. For min width calculations, it can get called up to
* 3 times, 1st to let constrained pct cols reach their limit, 2nd
* to let fix cols reach their limit and 3rd to spread any remainder among
* auto cols. If there are no auto cols then only constrained cols are considered.
* @param aWidthIndex - the width to calculate (see nsTableColFrame.h for enums)
* @param aCellFrame - the frame of the cell with a colspan
* @param aCellWidth - the width of the cell with a colspan
* @param aColIndex - the column index of the cell in the table
* @param aColSpan - the colspan of the cell
* @param aLimitType - the type of limit (ie. pct, fix, none).
* @param aPixelToTwips- the number of twips in a pixel.
* @return - true if all of aCellWidth was allocated, false otherwise
*/
PRBool ComputeNonPctColspanWidths(PRInt32 aWidthIndex,
const nsTableCellFrame* aCellFrame,
PRInt32 aCellWidth,
PRInt32 aColIndex,
PRInt32 aColSpan,
PRInt32& aLimitType,
float aPixelToTwips);
/**
* Determine percentage col widths for each col frame
* @param aReflowState - the reflow state of the table
* @param aBasis - the basis for percent width as computed by CalcPctAdjTableWidth
* @param aTableIsAutoWidth - true if no width specification for the table is available
* @param aPixelToTwips - the number of twips in a pixel.
* @return - the adjusted basis including table border, padding and cell spacing
*/
nscoord AssignPctColumnWidths(const nsHTMLReflowState& aReflowState,
nscoord aBasis,
PRBool aTableIsAutoWidth,
float aPixelToTwips);
/**
* Reduce the percent columns by the amount specified in aExcess as the percent width's
* can accumulate to be over 100%
* @param aExcess - reduction amount
*/
void ReduceOverSpecifiedPctCols(nscoord aExcess);
/**
* calculate totals by width type. The logic here is kept in synch with
* that in CanAllocate
* @param aTotalCounts - array with counts for each width type that has determined the aTotalWidths sum
* @param aTotalWidths - array with accumulated widths for each width type
* @param aDupedWidths - (duplicatd) are widths that will be allocated in BalanceColumnWidths before aTotalsWidths
* @param a0ProportionalCount - number of columns with col="0*" constraint
*/
void CalculateTotals(PRInt32* aTotalCounts,
PRInt32* aTotalWidths,
PRInt32* aDupedWidths,
PRInt32& a0ProportionalCount);
/**
* Allocate aWidthType values to the corresponding columns
* @param aTotalAllocated - width that has been allocated in this routine
* @param aAllocTypes - width type that has determined col width
* @param aWidthType - width type selecting the columns for full width allocation
*/
void AllocateFully(nscoord& aTotalAllocated,
PRInt32* aAllocTypes,
PRInt32 aWidthType);
/**
* Allocate aWidthType values to the corresponding columns up to the aAvailWidth
* @param aAvailWidth - width that can distributed to the selected columns
* @param aWidthType - width type selecting the columns for width allocation
* @param aStartAtMin - allocation should start at min. content width
* @param aAllocTypes - width type that has determined col width
* @param aPixelToTwips - the number of twips in a pixel.
*/
void AllocateConstrained(PRInt32 aAvailWidth,
PRInt32 aWidthType,
PRBool aStartAtMin,
PRInt32* aAllocTypes,
float aPixelToTwips);
/**
* Give the remaining space and exclude the selected columns
* @param aAllocAmount - space that can be distributed
* @param aAllocTypes - width type that has determined col width
* @param aExcludePct - dont give space to percent columns
* @param aExcludeFix - dont give space to fixed width columns
* @param aExcludePro - dont give space to proportional columns
* @param aExclude0Pro - dont give space to proportional columns with 0*
* @param aPixelToTwips - the number of twips in a pixel.
*/
void AllocateUnconstrained(PRInt32 aAllocAmount,
PRInt32* aAllocTypes,
PRBool aExcludePct,
PRBool aExcludeFix,
PRBool aExcludePro,
PRBool aExclude0Pro,
float aPixelToTwips);
/**
* Check in debug mode whether the routine is called on a continuing frame
*/
void ContinuingFrameCheck();
protected:
nsTableFrame * mTableFrame;
PRInt32 mCols;
// cached data
nscoord mCellSpacingTotal; // all of the cellspacing for all of the cols
float mMinToDesProportionRatio;
PRPackedBool mIsNavQuirksMode;
};
#endif
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