192935238f
now work correctly. extra space is now properly apportioned in the "table fits" case when the table contains auto-width cells. git-svn-id: svn://10.0.0.236/trunk@4683 18797224-902f-48f8-a5cc-f745e15eee43
198 lines
8.2 KiB
C++
198 lines
8.2 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef BasicTableLayoutStrategy_h__
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#define BasicTableLayoutStrategy_h__
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#include "nscore.h"
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#include "nsITableLayoutStrategy.h"
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#include "nsCoord.h"
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class nsTableFrame;
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struct nsStylePosition;
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/* ----------- SpanInfo ---------- */
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struct SpanInfo
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{
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nscoord span;
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nscoord cellMinWidth;
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nscoord cellDesiredWidth;
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SpanInfo(nscoord aSpan, nscoord aMinWidth, nscoord aDesiredWidth)
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{
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span = aSpan;
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cellMinWidth = aMinWidth;
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cellDesiredWidth = aDesiredWidth;
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};
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~SpanInfo() {};
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};
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/* ---------- BasicTableLayoutStrategy ---------- */
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class BasicTableLayoutStrategy : public nsITableLayoutStrategy
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{
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public:
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/** Public constructor.
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* @paran aFrame the table frame for which this delegate will do layout
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* @param aNumCols the total number of columns in the table
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*/
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BasicTableLayoutStrategy(nsTableFrame *aFrame, PRInt32 aNumCols);
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~BasicTableLayoutStrategy();
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virtual PRBool BalanceColumnWidths(nsIPresContext* aPresContext,
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nsIStyleContext *aTableStyle,
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const nsReflowState& aReflowState,
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nscoord aMaxWidth,
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nscoord &aTotalFixedWidth,
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nscoord &aMinTableWidth,
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nscoord &aMaxTableWidth,
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nsSize* aMaxElementSize);
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/** assign widths for each column that has fixed width.
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* Computes the minimum and maximum table widths.
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* Sets mColumnWidths as a side effect.
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*
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* @param aPresContext the presentation context
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* @param aMaxWidth the maximum width of the table
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* @param aTableStyle the resolved style for the table
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* @param aTotalFixedWidth out param, the sum of the fixed width columns
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* @param aMinTableWidth out param, the min possible table width
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* @param aMaxTableWidth out param, the max table width
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*
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* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
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*
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* TODO: should be renamed to "AssignKnownWidthInformation
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*/
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virtual PRBool AssignFixedColumnWidths(nsIPresContext* aPresContext,
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nscoord aMaxWidth,
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nscoord & aTotalFixedWidth,
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nscoord & aMinTableWidth,
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nscoord & aMaxTableWidth);
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/** assign widths for each column that has proportional width inside a table that
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* has auto width (width set by the content and available space.)
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* Sets mColumnWidths as a side effect.
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*
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* @param aPresContext the presentation context
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* @param aTableStyle the resolved style for the table
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* @param aAvailWidth the remaining amount of horizontal space available
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* @param aMaxWidth the total amount of horizontal space available
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* @param aMinTableWidth the min possible table width
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* @param aMaxTableWidth the max table width
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*
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* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
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*
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*/
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virtual PRBool BalanceProportionalColumns(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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nscoord aAvailWidth,
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nscoord aMaxWidth,
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nscoord aMinTableWidth,
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nscoord aMaxTableWidth,
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nscoord aTableFixedWidth);
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/** assign the minimum allowed width for each column that has proportional width.
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* Typically called when the min table width doesn't fit in the available space.
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* Sets mColumnWidths as a side effect.
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*
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* @param aPresContext the presentation context
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*
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* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
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*/
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virtual PRBool SetColumnsToMinWidth(nsIPresContext* aPresContext);
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/** assign the maximum allowed width for each column that has proportional width.
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* Typically called when the desired max table width fits in the available space.
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* Sets mColumnWidths as a side effect.
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*
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* @param aPresContext the presentation context
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* @param aAvailWidth the remaining amount of horizontal space available
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* @param aMaxWidth the total amount of horizontal space available
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* @param aTableFixedWidth the specified width of the table. If there is none,
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* this param is 0
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*
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* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
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*/
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virtual PRBool BalanceColumnsTableFits(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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nscoord aAvailWidth,
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nscoord aMaxWidth,
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nscoord aTableFixedWidth);
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/** assign widths for each column that has proportional width inside a table that
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* has auto width (width set by the content and available space) according to the
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* HTML 4 specification.
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* Sets mColumnWidths as a side effect.
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*
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* @param aPresContext the presentation context
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* @param aTableStyle the resolved style for the table
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* @param aAvailWidth the remaining amount of horizontal space available
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* @param aMaxWidth the total amount of horizontal space available
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* @param aMinTableWidth the min possible table width
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* @param aMaxTableWidth the max table width
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*
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* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
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*
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* TODO: rename this method to reflect that it is a Nav4 compatibility method
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*/
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virtual PRBool BalanceColumnsConstrained(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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nscoord aAvailWidth,
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nscoord aMaxWidth,
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nscoord aMinTableWidth,
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nscoord aMaxTableWidth);
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/** starting with a partially balanced table, compute the amount
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* of space to pad each column by to completely balance the table.
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* set the column widths in mTableFrame based on these computations.
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*
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* @param aTableFixedWidth the specified width of the table. If there is none,
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* this param is 0
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* @param aComputedTableWidth the width of the table before this final step.
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* @param aNumCols the number of columns in the table
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*
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* @return void
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*/
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virtual void DistributeExcessSpace(nscoord aTableFixedWidth,
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nscoord aComputedTableWidth,
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PRInt32 aNumCols,
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PRInt32 *aColWidths);
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/** return true if the style indicates that the width is a specific width
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* for the purposes of column width determination.
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* return false if the width changes based on content, parent size, etc.
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*/
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virtual PRBool IsFixedWidth(const nsStylePosition* aStylePosition);
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virtual PRBool IsAutoWidth(const nsStylePosition* aStylePosition);
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protected:
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nsTableFrame * mTableFrame;
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PRInt32 mCols;
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PRInt32 mNumCols;
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};
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#endif
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