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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef RenderListItem_h
     24 #define RenderListItem_h
     25 
     26 #include "core/rendering/RenderBlockFlow.h"
     27 
     28 namespace blink {
     29 
     30 class HTMLOListElement;
     31 class RenderListMarker;
     32 
     33 class RenderListItem FINAL : public RenderBlockFlow {
     34 public:
     35     explicit RenderListItem(Element*);
     36     virtual void trace(Visitor*) OVERRIDE;
     37 
     38     int value() const { if (!m_isValueUpToDate) updateValueNow(); return m_value; }
     39     void updateValue();
     40 
     41     bool hasExplicitValue() const { return m_hasExplicitValue; }
     42     int explicitValue() const { return m_explicitValue; }
     43     void setExplicitValue(int value);
     44     void clearExplicitValue();
     45 
     46     void setNotInList(bool);
     47     bool notInList() const { return m_notInList; }
     48 
     49     const String& markerText() const;
     50 
     51     void updateListMarkerNumbers();
     52 
     53     static void updateItemValuesForOrderedList(const HTMLOListElement*);
     54     static unsigned itemCountForOrderedList(const HTMLOListElement*);
     55 
     56     bool isEmpty() const;
     57 
     58 private:
     59     virtual const char* renderName() const OVERRIDE { return "RenderListItem"; }
     60 
     61     virtual bool isListItem() const OVERRIDE { return true; }
     62 
     63     virtual void willBeDestroyed() OVERRIDE;
     64 
     65     virtual void insertedIntoTree() OVERRIDE;
     66     virtual void willBeRemovedFromTree() OVERRIDE;
     67 
     68     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;
     69 
     70     virtual void layout() OVERRIDE;
     71 
     72     // Returns true if we re-attached and updated the location of the marker.
     73     bool updateMarkerLocation();
     74     void updateMarkerLocationAndInvalidateWidth();
     75 
     76     void positionListMarker();
     77 
     78     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
     79 
     80     virtual void addOverflowFromChildren() OVERRIDE;
     81 
     82     inline int calcValue() const;
     83     void updateValueNow() const;
     84     void explicitValueChanged();
     85 
     86     int m_explicitValue;
     87     RawPtrWillBeMember<RenderListMarker> m_marker;
     88     mutable int m_value;
     89 
     90     bool m_hasExplicitValue : 1;
     91     mutable bool m_isValueUpToDate : 1;
     92     bool m_notInList : 1;
     93 };
     94 
     95 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderListItem, isListItem());
     96 
     97 } // namespace blink
     98 
     99 #endif // RenderListItem_h
    100