зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
4.4 KiB
C++
113 строки
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef FixedTableLayoutStrategy_h__
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#define FixedTableLayoutStrategy_h__
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#include "nscore.h"
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#include "BasicTableLayoutStrategy.h"
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#include "nsCoord.h"
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class nsVoidArray;
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class nsTableFrame;
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struct nsStylePosition;
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/* ---------- FixedTableLayoutStrategy ---------- */
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/** Implementation of HTML4 "table-layout=fixed" table layout.
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* The input to this class is the resolved styles for both the
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* table columns and the cells in row0.
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* The output from this class is to set the column widths in
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* mTableFrame.
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*/
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class FixedTableLayoutStrategy : public BasicTableLayoutStrategy
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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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FixedTableLayoutStrategy(nsTableFrame *aFrame);
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/** destructor */
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virtual ~FixedTableLayoutStrategy();
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/** Called during resize reflow to determine the new column widths
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* @param aTableStyle - the resolved style for mTableFrame
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* @param aReflowState - the reflow state for mTableFrame
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* @param aMaxWidth - the computed max width for columns to fit into
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*/
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virtual PRBool BalanceColumnWidths(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState);
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virtual nscoord CalcPctAdjTableWidth(const nsHTMLReflowState& aReflowState,
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nscoord aAvailWidth,
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float aPixelToTwips) {return 0;};
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#ifdef DEBUG
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void SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const {
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*aResult = sizeof(*this);
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}
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#endif
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protected:
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/* assign the width of all columns
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* if there is a colframe with a width attribute, use it as the column width.
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* otherwise if there is a cell in the first row and it has a width attribute, use it.
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* if this cell includes a colspan, width is divided equally among spanned columns
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* otherwise the cell get a proportion of the remaining space.
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* as determined by the table width attribute. If no table width attribute, it gets 0 width
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* Computes the minimum and maximum table widths.
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*
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* Set column width information in each column frame and in the table frame.
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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 AssignNonPctColumnWidths(nsIPresContext* aPresContext,
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nscoord aComputedWidth,
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const nsHTMLReflowState& aReflowState,
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float aPixelToTwips);
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};
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#endif
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