/*

 * Copyright (C) 2009 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "AccessibilitySlider.h"

#include "AXObjectCache.h"

#include "HTMLInputElement.h"

#include "HTMLNames.h"

#include "RenderObject.h"

#include "RenderSlider.h"

namespace WebCore {

using namespace HTMLNames;

AccessibilitySlider::AccessibilitySlider(RenderObject* renderer)

    : AccessibilityRenderObject(renderer)

{

}

PassRefPtr<AccessibilitySlider> AccessibilitySlider::create(RenderObject* renderer)

{

    return adoptRef(new AccessibilitySlider(renderer));

}

const AccessibilityObject::AccessibilityChildrenVector& AccessibilitySlider::children()

{

    if (!m_haveChildren)

        addChildren();

    return m_children;

}

AccessibilityOrientation AccessibilitySlider::orientation() const

{

    // Default to horizontal in the unknown case.

    if (!m_renderer)

        return AccessibilityOrientationHorizontal;

    RenderStyle* style = m_renderer->style();

    if (!style)

        return AccessibilityOrientationHorizontal;

    ControlPart styleAppearance = style->appearance();

    switch (styleAppearance) {

    case SliderThumbHorizontalPart:

    case SliderHorizontalPart:

    case MediaSliderPart:

        return AccessibilityOrientationHorizontal;

    case SliderThumbVerticalPart: 

    case SliderVerticalPart:

    case MediaVolumeSliderPart:

        return AccessibilityOrientationVertical;

    default:

        return AccessibilityOrientationHorizontal;

    }

}

void AccessibilitySlider::addChildren()

{

    ASSERT(!m_haveChildren); 

    m_haveChildren = true;

    AccessibilitySliderThumb* thumb = static_cast<AccessibilitySliderThumb*>(m_renderer->document()->axObjectCache()->getOrCreate(SliderThumbRole));

    thumb->setParentObject(this);

    m_children.append(thumb);

}

const AtomicString& AccessibilitySlider::getAttribute(const QualifiedName& attribute) const

{

    return element()->getAttribute(attribute);

}

bool AccessibilitySlider::accessibilityIsIgnored() const

{

    AccessibilityObjectInclusion decision = accessibilityIsIgnoredBase();

    if (decision == IncludeObject)

        return false;

    if (decision == IgnoreObject)

        return true;

    return false;

}

float AccessibilitySlider::valueForRange() const

{

    return element()->value().toFloat();

}

float AccessibilitySlider::maxValueForRange() const

{

    return getAttribute(maxAttr).toFloat();

}

float AccessibilitySlider::minValueForRange() const

{

    return getAttribute(minAttr).toFloat();

}

void AccessibilitySlider::setValue(const String& value)

{

    HTMLInputElement* input = element();

    if (input->value() == value)

        return;

    input->setValue(value);

    // Fire change event manually, as RenderSlider::setValueForPosition does.

    input->dispatchFormControlChangeEvent();

}

HTMLInputElement* AccessibilitySlider::element() const

{

    return static_cast<HTMLInputElement*>(m_renderer->node());

}

AccessibilitySliderThumb::AccessibilitySliderThumb()

    : m_parentSlider(0)

{

}

PassRefPtr<AccessibilitySliderThumb> AccessibilitySliderThumb::create()

{

    return adoptRef(new AccessibilitySliderThumb());

}

IntRect AccessibilitySliderThumb::elementRect() const

{

    if (!m_parentSlider->renderer())

        return IntRect();

    IntRect intRect = toRenderSlider(m_parentSlider->renderer())->thumbRect();

    FloatQuad floatQuad = m_parentSlider->renderer()->localToAbsoluteQuad(FloatRect(intRect));

    return floatQuad.enclosingBoundingBox();

}

IntSize AccessibilitySliderThumb::size() const

{

    return elementRect().size();

}

} // namespace WebCore