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      1 /*
      2  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #ifndef RenderSlider_h
     22 #define RenderSlider_h
     23 
     24 #include "core/rendering/RenderFlexibleBox.h"
     25 
     26 namespace WebCore {
     27 
     28 class HTMLInputElement;
     29 class MouseEvent;
     30 class SliderThumbElement;
     31 
     32 class RenderSlider FINAL : public RenderFlexibleBox {
     33 public:
     34     static const int defaultTrackLength;
     35 
     36     explicit RenderSlider(HTMLInputElement*);
     37     virtual ~RenderSlider();
     38 
     39     bool inDragMode() const;
     40 
     41 private:
     42     virtual const char* renderName() const { return "RenderSlider"; }
     43     virtual bool isSlider() const { return true; }
     44     virtual bool canBeReplacedWithInlineRunIn() const OVERRIDE;
     45 
     46     virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const;
     47     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
     48     virtual void computePreferredLogicalWidths() OVERRIDE;
     49     virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
     50     virtual void layout();
     51 };
     52 
     53 inline RenderSlider* toRenderSlider(RenderObject* object)
     54 {
     55     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSlider());
     56     return static_cast<RenderSlider*>(object);
     57 }
     58 
     59 // This will catch anyone doing an unnecessary cast.
     60 void toRenderSlider(const RenderSlider*);
     61 
     62 } // namespace WebCore
     63 
     64 #endif // RenderSlider_h
     65