/*

 * Copyright (C) 2009 Google 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:

 *

 *     * Redistributions of source code must retain the above copyright

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

 *     * 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.

 *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT

 * OWNER OR 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 "WebAccessibilityObject.h"

#include "AccessibilityObject.h"

#include "EventHandler.h"

#include "FrameView.h"

#include "PlatformKeyboardEvent.h"

#include "WebPoint.h"

#include "WebRect.h"

#include "WebString.h"

using namespace WebCore;

namespace WebKit {

class WebAccessibilityObjectPrivate : public WebCore::AccessibilityObject {

};

void WebAccessibilityObject::reset()

{

    assign(0);

}

void WebAccessibilityObject::assign(const WebKit::WebAccessibilityObject& other)

{

    WebAccessibilityObjectPrivate* p = const_cast<WebAccessibilityObjectPrivate*>(other.m_private);

    if (p)

        p->ref();

    assign(p);

}

WebString WebAccessibilityObject::accessibilityDescription() const

{

    if (!m_private)

        return WebString();

    m_private->updateBackingStore();

    return m_private->accessibilityDescription();

}

WebString WebAccessibilityObject::actionVerb() const

{

    if (!m_private)

        return WebString();

    m_private->updateBackingStore();

    return m_private->actionVerb();

}

bool WebAccessibilityObject::canSetFocusAttribute() const

{

    if (!m_private)

        return false;

    m_private->updateBackingStore();

    return m_private->canSetFocusAttribute();

}

bool WebAccessibilityObject::canSetValueAttribute() const

{

    if (!m_private)

        return false;

    m_private->updateBackingStore();

    return m_private->canSetValueAttribute();

}

unsigned WebAccessibilityObject::childCount() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->children().size();

}

WebAccessibilityObject WebAccessibilityObject::childAt(unsigned index) const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    if (m_private->children().size() <= index)

        return WebAccessibilityObject();

    return WebAccessibilityObject(m_private->children()[index]);

}

WebAccessibilityObject WebAccessibilityObject::firstChild() const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    return WebAccessibilityObject(m_private->firstChild());

}

WebAccessibilityObject WebAccessibilityObject::focusedChild() const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    RefPtr<AccessibilityObject> focused = m_private->focusedUIElement();

    if (m_private == focused.get() || focused->parentObject() == m_private)

        return WebAccessibilityObject(focused);

    return WebAccessibilityObject();

}

WebAccessibilityObject WebAccessibilityObject::lastChild() const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    return WebAccessibilityObject(m_private->lastChild());

}

WebAccessibilityObject WebAccessibilityObject::nextSibling() const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    return WebAccessibilityObject(m_private->nextSibling());

}

WebAccessibilityObject WebAccessibilityObject::parentObject() const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    return WebAccessibilityObject(m_private->parentObject());

}

WebAccessibilityObject WebAccessibilityObject::previousSibling() const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    return WebAccessibilityObject(m_private->previousSibling());

}

bool WebAccessibilityObject::isAnchor() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isAnchor();

}

bool WebAccessibilityObject::isChecked() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isChecked();

}

bool WebAccessibilityObject::isFocused() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isFocused();

}

bool WebAccessibilityObject::isEnabled() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isEnabled();

}

bool WebAccessibilityObject::isHovered() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isHovered();

}

bool WebAccessibilityObject::isIndeterminate() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isIndeterminate();

}

bool WebAccessibilityObject::isMultiSelectable() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isMultiSelectable();

}

bool WebAccessibilityObject::isOffScreen() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isOffScreen();

}

bool WebAccessibilityObject::isPasswordField() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isPasswordField();

}

bool WebAccessibilityObject::isPressed() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isPressed();

}

bool WebAccessibilityObject::isReadOnly() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isReadOnly();

}

bool WebAccessibilityObject::isVisited() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->isVisited();

}

WebRect WebAccessibilityObject::boundingBoxRect() const

{

    if (!m_private)

        return WebRect();

    m_private->updateBackingStore();

    return m_private->documentFrameView()->contentsToWindow(m_private->boundingBoxRect());

}

WebString WebAccessibilityObject::helpText() const

{

    if (!m_private)

        return WebString();

    m_private->updateBackingStore();

    return m_private->helpText();

}

int WebAccessibilityObject::headingLevel() const

{

    if (!m_private)

        return 0;

    m_private->updateBackingStore();

    return m_private->headingLevel();

}

WebAccessibilityObject WebAccessibilityObject::hitTest(const WebPoint& point) const

{

    if (!m_private)

        return WebAccessibilityObject();

    m_private->updateBackingStore();

    IntPoint contentsPoint = m_private->documentFrameView()->windowToContents(point);

    RefPtr<AccessibilityObject> hit = m_private->doAccessibilityHitTest(contentsPoint);

    if (hit.get())

        return WebAccessibilityObject(hit);

    if (m_private->boundingBoxRect().contains(contentsPoint))

        return *this;

    return WebAccessibilityObject();

}

WebString WebAccessibilityObject::keyboardShortcut() const

{

    if (!m_private)

        return WebString();

    m_private->updateBackingStore();

    String accessKey = m_private->accessKey();

    if (accessKey.isNull())

        return WebString();

    static String modifierString;

    if (modifierString.isNull()) {

        unsigned modifiers = EventHandler::accessKeyModifiers();

        // Follow the same order as Mozilla MSAA implementation:

        // Ctrl+Alt+Shift+Meta+key. MSDN states that keyboard shortcut strings

        // should not be localized and defines the separator as "+".

        if (modifiers & PlatformKeyboardEvent::CtrlKey)

            modifierString += "Ctrl+";

        if (modifiers & PlatformKeyboardEvent::AltKey)

            modifierString += "Alt+";

        if (modifiers & PlatformKeyboardEvent::ShiftKey)

            modifierString += "Shift+";

        if (modifiers & PlatformKeyboardEvent::MetaKey)

            modifierString += "Win+";

    }

    return modifierString + accessKey;

}

bool WebAccessibilityObject::performDefaultAction() const

{

    if (!m_private)

        return false;

    m_private->updateBackingStore();

    return m_private->performDefaultAction();

}

WebAccessibilityRole WebAccessibilityObject::roleValue() const

{

    if (!m_private)

        return WebKit::WebAccessibilityRoleUnknown;

    m_private->updateBackingStore();

    return static_cast<WebAccessibilityRole>(m_private->roleValue());

}

void WebAccessibilityObject::setFocused(bool on) const

{

    if (m_private)

        m_private->setFocused(on);

}

WebString WebAccessibilityObject::stringValue() const

{

    if (!m_private)

        return WebString();

    m_private->updateBackingStore();

    return m_private->stringValue();

}

WebString WebAccessibilityObject::title() const

{

    if (!m_private)

        return WebString();

    m_private->updateBackingStore();

    return m_private->title();

}

WebAccessibilityObject::WebAccessibilityObject(const WTF::PassRefPtr<WebCore::AccessibilityObject>& object)

    : m_private(static_cast<WebAccessibilityObjectPrivate*>(object.releaseRef()))

{

}

WebAccessibilityObject& WebAccessibilityObject::operator=(const WTF::PassRefPtr<WebCore::AccessibilityObject>& object)

{

    assign(static_cast<WebAccessibilityObjectPrivate*>(object.releaseRef()));

    return *this;

}

WebAccessibilityObject::operator WTF::PassRefPtr<WebCore::AccessibilityObject>() const

{

    return PassRefPtr<WebCore::AccessibilityObject>(const_cast<WebAccessibilityObjectPrivate*>(m_private));

}

void WebAccessibilityObject::assign(WebAccessibilityObjectPrivate* p)

{

    // p is already ref'd for us by the caller

    if (m_private)

        m_private->deref();

    m_private = p;

}

} // namespace WebKit