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      1 /*
      2  * This file is part of the select element renderer in WebCore.
      3  *
      4  * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  *
     10  * 1.  Redistributions of source code must retain the above copyright
     11  *     notice, this list of conditions and the following disclaimer.
     12  * 2.  Redistributions in binary form must reproduce the above copyright
     13  *     notice, this list of conditions and the following disclaimer in the
     14  *     documentation and/or other materials provided with the distribution.
     15  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     16  *     its contributors may be used to endorse or promote products derived
     17  *     from this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     20  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     22  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef RenderListBox_h
     32 #define RenderListBox_h
     33 
     34 #include "core/rendering/RenderBlockFlow.h"
     35 
     36 namespace blink {
     37 
     38 class HTMLSelectElement;
     39 
     40 class RenderListBox FINAL : public RenderBlockFlow {
     41 public:
     42     explicit RenderListBox(Element*);
     43     virtual ~RenderListBox();
     44 
     45     int size() const;
     46 
     47     void paintInvalidationOfScrollbarIfNeeded();
     48 
     49     // Unlike scrollRectToVisible this will not scroll parent boxes.
     50     void scrollToRect(const LayoutRect&);
     51 private:
     52     HTMLSelectElement* selectElement() const;
     53 
     54     virtual const char* renderName() const OVERRIDE { return "RenderListBox"; }
     55 
     56     virtual bool isListBox() const OVERRIDE { return true; }
     57 
     58     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE;
     59     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
     60 
     61     virtual void stopAutoscroll() OVERRIDE;
     62 
     63     void setHasVerticalScrollbar(bool hasScrollbar);
     64     PassRefPtr<Scrollbar> createScrollbar();
     65     void destroyScrollbar();
     66 
     67     LayoutUnit defaultItemHeight() const;
     68     LayoutUnit itemHeight() const;
     69 };
     70 
     71 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderListBox, isListBox());
     72 
     73 } // namepace blink
     74 
     75 #endif // RenderListBox_h
     76