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106 lines
4.3 KiB
C++
106 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsITableLayoutStrategy_h__
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#define nsITableLayoutStrategy_h__
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#include "nscore.h"
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#include "nsSize.h"
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class nsIStyleContext;
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struct nsHTMLReflowState;
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class nsTableCellFrame;
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class nsStyleCoord;
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class nsISizeOfHandler;
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class nsITableLayoutStrategy
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{
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public:
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/** call once every time any table thing changes (content, structure, or style)
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* @param aMaxElementSize [OUT] if not null, the max element size is computed and returned in this param
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* @param aNumCols the total number of columns in the table
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* @param aComputedWidth the computed size of the table
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*/
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virtual PRBool Initialize(nsSize* aMaxElementSize,
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PRInt32 aNumCols,
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nscoord aComputedWidth)=0;
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/** compute the max-element-size for the table
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* @param aMaxElementSize [OUT] width field set to the min legal width of the table
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*/
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virtual void SetMaxElementSize(nsSize* aMaxElementSize)=0;
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/** assign widths for each column, taking into account the table content, the effective style,
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* the layout constraints, and the compatibility mode. Sets mColumnWidths as a side effect.
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* @param aTableStyle the resolved style for the table
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* @param aReflowState the reflow state for the calling table frame
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* @param aMaxWidth the width constraint
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*/
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virtual PRBool BalanceColumnWidths(nsIStyleContext* aTableStyle,
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const nsHTMLReflowState& aReflowState,
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nscoord aMaxWidth)=0;
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/** return the computed max "natural" size of the table.
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* this is the sum of the desired size of the content taking into account table
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* attributes, but NOT factoring in the available size the table is laying out into.
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* the actual table width in a given situation will depend on the available size
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* provided by the parent (especially for percent-width tables.)
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*/
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virtual nscoord GetTableMaxContentWidth() const = 0;
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/** return the computed minimum possible size of the table.
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* this is the sum of the minimum sizes of the content taking into account table
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* attributes, but NOT factoring in the available size the table is laying out into.
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* the actual table width in a given situation will depend on the available size
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* provided by the parent (especially for percent-width tables.)
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*/
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virtual nscoord GetTableMinContentWidth() const = 0;
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/** return the value of the COLS attribute, used for balancing column widths */
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virtual nscoord GetCOLSAttribute() const = 0;
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/** return the total number of columns in the table */
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virtual nscoord GetNumCols() const = 0;
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// see nsTableFrame::ColumnsCanBeInvalidatedBy
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virtual PRBool ColumnsCanBeInvalidatedBy(nsStyleCoord* aPrevStyleWidth,
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const nsTableCellFrame& aCellFrame) const = 0;
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// see nsTableFrame::ColumnsCanBeInvalidatedBy
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virtual PRBool ColumnsCanBeInvalidatedBy(const nsTableCellFrame& aCellFrame,
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PRBool aConsiderMinWidth = PR_FALSE) const = 0;
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// see nsTableFrame::ColumnsCanBeInvalidatedBy
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virtual PRBool ColumnsAreValidFor(const nsTableCellFrame& aCellFrame,
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nscoord aPrevCellMin,
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nscoord aPrevCellDes) const = 0;
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#ifdef DEBUG
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virtual void SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const = 0;
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#endif
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};
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#endif
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