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      1 /*
      2  * Copyright (C) 2009 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef AccessibilitySlider_h
     30 #define AccessibilitySlider_h
     31 
     32 #include "AccessibilityRenderObject.h"
     33 
     34 namespace WebCore {
     35 
     36 class HTMLInputElement;
     37 
     38 class AccessibilitySlider : public AccessibilityRenderObject {
     39 
     40 public:
     41     static PassRefPtr<AccessibilitySlider> create(RenderObject*);
     42     virtual ~AccessibilitySlider() { }
     43 
     44     virtual AccessibilityRole roleValue() const { return SliderRole; }
     45     virtual bool accessibilityIsIgnored() const { return false; }
     46 
     47     virtual bool isSlider() const { return true; }
     48 
     49     virtual const AccessibilityChildrenVector& children();
     50     virtual void addChildren();
     51 
     52     virtual bool canSetValueAttribute() const { return true; }
     53     const AtomicString& getAttribute(const QualifiedName& attribute) const;
     54 
     55     virtual void setValue(const String&);
     56     virtual float valueForRange() const;
     57     virtual float maxValueForRange() const;
     58     virtual float minValueForRange() const;
     59     virtual AccessibilityOrientation orientation() const;
     60 
     61 protected:
     62     AccessibilitySlider(RenderObject*);
     63 
     64 private:
     65     HTMLInputElement* element() const;
     66 };
     67 
     68 class AccessibilitySliderThumb : public AccessibilityObject {
     69 
     70 public:
     71     static PassRefPtr<AccessibilitySliderThumb> create();
     72     virtual ~AccessibilitySliderThumb() { }
     73 
     74     virtual AccessibilityRole roleValue() const { return SliderThumbRole; }
     75     virtual bool accessibilityIsIgnored() const { return false; }
     76 
     77     void setParentObject(AccessibilitySlider* slider) { m_parentSlider = slider; }
     78     virtual AccessibilityObject* parentObject() const { return m_parentSlider; }
     79 
     80     virtual IntSize size() const;
     81     virtual IntRect elementRect() const;
     82 
     83 private:
     84     AccessibilitySliderThumb();
     85 
     86     AccessibilitySlider* m_parentSlider;
     87 };
     88 
     89 
     90 } // namespace WebCore
     91 
     92 #endif // AccessibilitySlider_h
     93