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113 lines
4.8 KiB
C++
113 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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// vim:cindent:ts=4:et:sw=4:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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's table layout code.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org> (original author)
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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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* Web-compatible algorithms that determine column and table widths,
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* used for CSS2's 'table-layout: auto'.
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*/
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#ifndef BasicTableLayoutStrategy_h_
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#define BasicTableLayoutStrategy_h_
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#include "nsITableLayoutStrategy.h"
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class nsTableFrame;
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class BasicTableLayoutStrategy : public nsITableLayoutStrategy
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{
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public:
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BasicTableLayoutStrategy(nsTableFrame *aTableFrame);
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virtual ~BasicTableLayoutStrategy();
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// nsITableLayoutStrategy implementation
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virtual nscoord GetMinWidth(nsRenderingContext* aRenderingContext);
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virtual nscoord GetPrefWidth(nsRenderingContext* aRenderingContext,
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bool aComputingSize);
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virtual void MarkIntrinsicWidthsDirty();
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virtual void ComputeColumnWidths(const nsHTMLReflowState& aReflowState);
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private:
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// NOTE: Using prefix "BTLS" to avoid overlapping names with
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// the values of nsLayoutUtils::IntrinsicWidthType
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enum BtlsWidthType { BTLS_MIN_WIDTH,
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BTLS_PREF_WIDTH,
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BTLS_FINAL_WIDTH };
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// Compute intrinsic width member variables on the columns.
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void ComputeColumnIntrinsicWidths(nsRenderingContext* aRenderingContext);
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// Distribute a colspanning cell's percent width (if any) to its columns.
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void DistributePctWidthToColumns(float aSpanPrefPct,
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PRInt32 aFirstCol,
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PRInt32 aColCount);
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// Distribute a width of some BltsWidthType type to a set of columns.
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// aWidth: The amount of width to be distributed
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// aFirstCol: The index (in the table) of the first column to be
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// considered for receiving width
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// aColCount: The number of consecutive columns (starting with aFirstCol)
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// to be considered for receiving width
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// aWidthType: The type of width being distributed. (BTLS_MIN_WIDTH and
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// BTLS_PREF_WIDTH are intended to be used for dividing up
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// colspan's min & pref width. BTLS_FINAL_WIDTH is intended
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// to be used for distributing the table's final width across
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// all its columns)
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// aSpanHasSpecifiedWidth: Should be true iff:
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// - We're distributing a colspanning cell's
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// pref or min width to its columns
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// - The colspanning cell has a specified width.
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void DistributeWidthToColumns(nscoord aWidth,
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PRInt32 aFirstCol,
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PRInt32 aColCount,
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BtlsWidthType aWidthType,
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bool aSpanHasSpecifiedWidth);
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// Compute the min and pref widths of the table from the width
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// variables on the columns.
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void ComputeIntrinsicWidths(nsRenderingContext* aRenderingContext);
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nsTableFrame *mTableFrame;
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nscoord mMinWidth;
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nscoord mPrefWidth;
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nscoord mPrefWidthPctExpand;
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nscoord mLastCalcWidth;
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};
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#endif /* !defined(BasicTableLayoutStrategy_h_) */
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