pjs/layout/tables/nsITableLayoutStrategy.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsITableLayoutStrategy_h__
#define nsITableLayoutStrategy_h__
#include "nscore.h"
#include "nsSize.h"
class nsIStyleContext;
struct nsHTMLReflowState;
class nsTableCellFrame;
class nsStyleCoord;
class nsITableLayoutStrategy
{
public:
/** call once every time any table thing changes (content, structure, or style)
* @param aMaxElementSize [OUT] if not null, the max element size is computed and returned in this param
* @param aNumCols the total number of columns in the table
* @param aComputedWidth the computed size of the table
*/
virtual PRBool Initialize(nsSize* aMaxElementSize, PRInt32 aNumCols, nscoord aComputedWidth)=0;
/** compute the max-element-size for the table
* @param aMaxElementSize [OUT] width field set to the min legal width of the table
*/
virtual void SetMaxElementSize(nsSize* aMaxElementSize)=0;
/** assign widths for each column, taking into account the table content, the effective style,
* the layout constraints, and the compatibility mode. Sets mColumnWidths as a side effect.
* @param aTableStyle the resolved style for the table
* @param aReflowState the reflow state for the calling table frame
* @param aMaxWidth the width constraint
*/
virtual PRBool BalanceColumnWidths(nsIStyleContext* aTableStyle,
const nsHTMLReflowState& aReflowState,
nscoord aMaxWidth)=0;
/** return the computed max "natural" size of the table.
* this is the sum of the desired size of the content taking into account table
* attributes, but NOT factoring in the available size the table is laying out into.
* the actual table width in a given situation will depend on the available size
* provided by the parent (especially for percent-width tables.)
*/
virtual nscoord GetTableMaxContentWidth() const = 0;
/** return the computed minimum possible size of the table.
* this is the sum of the minimum sizes of the content taking into account table
* attributes, but NOT factoring in the available size the table is laying out into.
* the actual table width in a given situation will depend on the available size
* provided by the parent (especially for percent-width tables.)
*/
virtual nscoord GetTableMinContentWidth() const = 0;
/** return the value of the COLS attribute, used for balancing column widths */
virtual nscoord GetCOLSAttribute() const = 0;
/** return the total number of columns in the table */
virtual nscoord GetNumCols() const = 0;
// see nsTableFrame::ColumnsCanBeInvalidatedBy
virtual PRBool ColumnsCanBeInvalidatedBy(nsStyleCoord* aPrevStyleWidth,
const nsTableCellFrame& aCellFrame) const = 0;
// see nsTableFrame::ColumnsCanBeInvalidatedBy
virtual PRBool ColumnsCanBeInvalidatedBy(const nsTableCellFrame& aCellFrame,
PRBool aConsiderMinWidth = PR_FALSE) const = 0;
// see nsTableFrame::ColumnsCanBeInvalidatedBy
virtual PRBool ColumnsAreValidFor(const nsTableCellFrame& aCellFrame,
nscoord aPrevCellMin,
nscoord aPrevCellDes) const = 0;
};
#endif