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      1 /*
      2  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
      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 RenderMeter_h
     22 #define RenderMeter_h
     23 
     24 #include "core/rendering/RenderBlock.h"
     25 #include "core/rendering/RenderWidget.h"
     26 
     27 namespace WebCore {
     28 
     29 class HTMLMeterElement;
     30 
     31 class RenderMeter FINAL : public RenderBlock {
     32 public:
     33     explicit RenderMeter(HTMLElement*);
     34     virtual ~RenderMeter();
     35 
     36     HTMLMeterElement* meterElement() const;
     37     virtual void updateFromElement();
     38 
     39 private:
     40     virtual void updateLogicalWidth() OVERRIDE;
     41     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE;
     42 
     43     virtual const char* renderName() const { return "RenderMeter"; }
     44     virtual bool isMeter() const { return true; }
     45     virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
     46 
     47     double valueRatio() const;
     48 };
     49 
     50 inline RenderMeter* toRenderMeter(RenderObject* object)
     51 {
     52     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isMeter());
     53     return static_cast<RenderMeter*>(object);
     54 }
     55 
     56 // This will catch anyone doing an unnecessary cast.
     57 void toRenderMeter(const RenderMeter*);
     58 
     59 } // namespace WebCore
     60 
     61 #endif // RenderMeter_h
     62