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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 
     30 #ifndef AccessibilityMediaControls_h
     31 #define AccessibilityMediaControls_h
     32 
     33 #include "core/accessibility/AccessibilitySlider.h"
     34 #include "core/html/shadow/MediaControlElements.h"
     35 
     36 namespace WebCore {
     37 
     38 class AccessibilityMediaControl : public AccessibilityRenderObject {
     39 
     40 public:
     41     static PassRefPtr<AccessibilityObject> create(RenderObject*);
     42     virtual ~AccessibilityMediaControl() { }
     43 
     44     virtual AccessibilityRole roleValue() const OVERRIDE;
     45 
     46     virtual String title() const OVERRIDE;
     47     virtual String accessibilityDescription() const OVERRIDE;
     48     virtual String helpText() const OVERRIDE;
     49 
     50 protected:
     51     explicit AccessibilityMediaControl(RenderObject*);
     52     MediaControlElementType controlType() const;
     53     String controlTypeName() const;
     54     virtual void accessibilityText(Vector<AccessibilityText>&) OVERRIDE;
     55     virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
     56 };
     57 
     58 
     59 class AccessibilityMediaTimeline : public AccessibilitySlider {
     60 
     61 public:
     62     static PassRefPtr<AccessibilityObject> create(RenderObject*);
     63     virtual ~AccessibilityMediaTimeline() { }
     64 
     65     virtual String helpText() const OVERRIDE;
     66     virtual String valueDescription() const OVERRIDE;
     67     const AtomicString& getAttribute(const QualifiedName& attribute) const;
     68 
     69 private:
     70     explicit AccessibilityMediaTimeline(RenderObject*);
     71 };
     72 
     73 
     74 class AccessibilityMediaControlsContainer : public AccessibilityMediaControl {
     75 
     76 public:
     77     static PassRefPtr<AccessibilityObject> create(RenderObject*);
     78     virtual ~AccessibilityMediaControlsContainer() { }
     79 
     80     virtual AccessibilityRole roleValue() const OVERRIDE { return ToolbarRole; }
     81 
     82     virtual String helpText() const OVERRIDE;
     83     virtual String accessibilityDescription() const OVERRIDE;
     84 
     85 private:
     86     explicit AccessibilityMediaControlsContainer(RenderObject*);
     87     bool controllingVideoElement() const;
     88     const String elementTypeName() const;
     89     virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
     90 };
     91 
     92 
     93 class AccessibilityMediaTimeDisplay : public AccessibilityMediaControl {
     94 
     95 public:
     96     static PassRefPtr<AccessibilityObject> create(RenderObject*);
     97     virtual ~AccessibilityMediaTimeDisplay() { }
     98 
     99     virtual AccessibilityRole roleValue() const OVERRIDE { return StaticTextRole; }
    100 
    101     virtual String stringValue() const OVERRIDE;
    102     virtual String accessibilityDescription() const OVERRIDE;
    103 
    104 private:
    105     explicit AccessibilityMediaTimeDisplay(RenderObject*);
    106     virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
    107 };
    108 
    109 
    110 } // namespace WebCore
    111 
    112 #endif // AccessibilityMediaControls_h
    113