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      1 /*
      2  * Copyright (C) 2002 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2002 Dirk Mueller (mueller (at) kde.org)
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #ifndef AutoTableLayout_h
     22 #define AutoTableLayout_h
     23 
     24 #include "core/rendering/TableLayout.h"
     25 #include "platform/LayoutUnit.h"
     26 #include "platform/Length.h"
     27 #include "wtf/Vector.h"
     28 
     29 namespace blink {
     30 
     31 class RenderTable;
     32 class RenderTableCell;
     33 
     34 class AutoTableLayout FINAL : public TableLayout {
     35 public:
     36     AutoTableLayout(RenderTable*);
     37     virtual ~AutoTableLayout();
     38 
     39     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minWidth, LayoutUnit& maxWidth) OVERRIDE;
     40     virtual void applyPreferredLogicalWidthQuirks(LayoutUnit& minWidth, LayoutUnit& maxWidth) const OVERRIDE;
     41     virtual void layout() OVERRIDE;
     42     virtual void willChangeTableLayout() OVERRIDE { }
     43 
     44 private:
     45     void fullRecalc();
     46     void recalcColumn(unsigned effCol);
     47 
     48     int calcEffectiveLogicalWidth();
     49 
     50     void insertSpanCell(RenderTableCell*);
     51 
     52     struct Layout {
     53         Layout()
     54             : minLogicalWidth(0)
     55             , maxLogicalWidth(0)
     56             , effectiveMinLogicalWidth(0)
     57             , effectiveMaxLogicalWidth(0)
     58             , computedLogicalWidth(0)
     59             , emptyCellsOnly(true)
     60         {
     61         }
     62 
     63         Length logicalWidth;
     64         Length effectiveLogicalWidth;
     65         int minLogicalWidth;
     66         int maxLogicalWidth;
     67         int effectiveMinLogicalWidth;
     68         int effectiveMaxLogicalWidth;
     69         int computedLogicalWidth;
     70         bool emptyCellsOnly;
     71     };
     72 
     73     Vector<Layout, 4> m_layoutStruct;
     74     Vector<RenderTableCell*, 4> m_spanCells;
     75     bool m_hasPercent : 1;
     76     mutable bool m_effectiveLogicalWidthDirty : 1;
     77 };
     78 
     79 } // namespace blink
     80 
     81 #endif // AutoTableLayout_h
     82