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 "RenderBlock.h"
25 
26 namespace WebCore {
27 
28     class HTMLInputElement;
29     class MouseEvent;
30     class SliderThumbElement;
31 
32     class RenderSlider : public RenderBlock {
33     public:
34         RenderSlider(HTMLInputElement*);
35         virtual ~RenderSlider();
36 
37         bool inDragMode() const;
38         IntRect thumbRect();
39 
40     private:
renderName()41         virtual const char* renderName() const { return "RenderSlider"; }
isSlider()42         virtual bool isSlider() const { return true; }
43 
44         virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const;
45         virtual void computePreferredLogicalWidths();
46         virtual void layout();
47 
48         // FIXME: Eventually, the logic of manipulating slider thumb should move to
49         // SliderThumbElement and accessing shadowSliderThumb should not be necessary in this class.
50         SliderThumbElement* shadowSliderThumb() const;
51 
requiresForcedStyleRecalcPropagation()52         virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
53     };
54 
toRenderSlider(RenderObject * object)55     inline RenderSlider* toRenderSlider(RenderObject* object)
56     {
57         ASSERT(!object || object->isSlider());
58         return static_cast<RenderSlider*>(object);
59     }
60 
61     // This will catch anyone doing an unnecessary cast.
62     void toRenderSlider(const RenderSlider*);
63 
64 } // namespace WebCore
65 
66 #endif // RenderSlider_h
67