/*

 * Copyright (C) 2010 Apple Inc. All rights reserved.

 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)

 *

 * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 "WebEventFactoryQt.h"

#include <qgraphicssceneevent.h>

#include <QApplication>

#include <QKeyEvent>

#include <WebCore/PlatformKeyboardEvent.h>

#include <wtf/ASCIICType.h>

#include <wtf/CurrentTime.h>

using namespace WebCore;

namespace WebKit {

static WebMouseEvent::Button mouseButtonForEvent(QGraphicsSceneMouseEvent *event)

{

    if (event->button() == Qt::LeftButton || (event->buttons() & Qt::LeftButton))

        return WebMouseEvent::LeftButton;

    else if (event->button() == Qt::RightButton || (event->buttons() & Qt::RightButton))

        return WebMouseEvent::RightButton;

    else if (event->button() == Qt::MidButton || (event->buttons() & Qt::MidButton))

        return WebMouseEvent::MiddleButton;

    return WebMouseEvent::NoButton;

}

static WebEvent::Type webEventTypeForEvent(QEvent* event)

{

    switch (event->type()) {

        case QEvent::GraphicsSceneMouseDoubleClick:

        case QEvent::GraphicsSceneMousePress:

            return WebEvent::MouseDown;

        case QEvent::GraphicsSceneMouseRelease:

            return WebEvent::MouseUp;

        case QEvent::GraphicsSceneMouseMove:

            return WebEvent::MouseMove;

        case QEvent::Wheel:

            return WebEvent::Wheel;

        case QEvent::KeyPress:

            return WebEvent::KeyDown;

        case QEvent::KeyRelease:

            return WebEvent::KeyUp;

        default:

            // assert

            return WebEvent::MouseMove;

    }

}

static inline WebEvent::Modifiers modifiersForEvent(Qt::KeyboardModifiers modifiers)

{

    unsigned result = 0;

    if (modifiers & Qt::ShiftModifier)

        result |= WebEvent::ShiftKey;

    if (modifiers & Qt::ControlModifier)

        result |= WebEvent::ControlKey;

    if (modifiers & Qt::AltModifier)

        result |= WebEvent::AltKey;

    if (modifiers & Qt::MetaModifier)

        result |= WebEvent::MetaKey;

    return (WebEvent::Modifiers)result;

}

WebMouseEvent WebEventFactory::createWebMouseEvent(QGraphicsSceneMouseEvent* event, int eventClickCount)

{

    IntPoint position(event->pos().toPoint());

    IntPoint globalPosition(event->screenPos());

    WebEvent::Type type             = webEventTypeForEvent(event);

    WebMouseEvent::Button button    = mouseButtonForEvent(event);

    int positionX                   = position.x();

    int positionY                   = position.y();

    int globalPositionX             = globalPosition.x();

    int globalPositionY             = globalPosition.y();

    int clickCount                  = eventClickCount;

    WebEvent::Modifiers modifiers   = modifiersForEvent(event->modifiers());

    double timestamp                = WTF::currentTime();

    return WebMouseEvent(type, button, positionX, positionY, globalPositionX, globalPositionY, clickCount, modifiers, timestamp);

}

WebWheelEvent WebEventFactory::createWebWheelEvent(QGraphicsSceneWheelEvent* e)

{

    int x                                   = e->pos().x();

    int y                                   = e->pos().y();

    int globalX                             = e->screenPos().x();

    int globalY                             = e->screenPos().y();

    float deltaX                            = 0;

    float deltaY                            = 0;

    float wheelTicksX                       = 0;

    float wheelTicksY                       = 0;

    WebWheelEvent::Granularity granularity  = WebWheelEvent::ScrollByPixelWheelEvent;

    WebEvent::Modifiers modifiers           = modifiersForEvent(e->modifiers());

    double timestamp                        = WTF::currentTime();

    // A delta that is not mod 120 indicates a device that is sending

    // fine-resolution scroll events, so use the delta as number of wheel ticks

    // and number of pixels to scroll.See also webkit.org/b/29601

    bool fullTick = !(e->delta() % 120);

    if (e->orientation() == Qt::Horizontal) {

        deltaX = (fullTick) ? e->delta() / 120.0f : e->delta();

        wheelTicksX = deltaX;

    } else {

        deltaY = (fullTick) ? e->delta() / 120.0f : e->delta();

        wheelTicksY = deltaY;

    }

    // Use the same single scroll step as QTextEdit

    // (in QTextEditPrivate::init [h,v]bar->setSingleStep)

    static const float cDefaultQtScrollStep = 20.f;

#ifndef QT_NO_WHEELEVENT

    deltaX *= (fullTick) ? QApplication::wheelScrollLines() * cDefaultQtScrollStep : 1;

    deltaY *= (fullTick) ? QApplication::wheelScrollLines() * cDefaultQtScrollStep : 1;

#endif

    return WebWheelEvent(WebEvent::Wheel, x, y, globalX,  globalY, deltaX, deltaY, wheelTicksX, wheelTicksY, granularity, modifiers, timestamp);

}

WebKeyboardEvent WebEventFactory::createWebKeyboardEvent(QKeyEvent* event)

{

    const int state                 = event->modifiers();

    WebEvent::Type type             = webEventTypeForEvent(event);

    const String text               = event->text();

    const String unmodifiedText     = event->text();

    bool isAutoRepeat               = event->isAutoRepeat();

    bool isSystemKey                = false; // FIXME: No idea what that is.

    bool isKeypad                   = (state & Qt::KeypadModifier);

    const String keyIdentifier      = keyIdentifierForQtKeyCode(event->key());

    int windowsVirtualKeyCode       = windowsKeyCodeForKeyEvent(event->key(), isKeypad);

    int  nativeVirtualKeyCode       = event->nativeVirtualKey();

    WebEvent::Modifiers modifiers   = modifiersForEvent(event->modifiers());

    double timestamp                = WTF::currentTime();

    return WebKeyboardEvent(type, text, unmodifiedText, keyIdentifier, windowsVirtualKeyCode, nativeVirtualKeyCode, isAutoRepeat, isKeypad, isSystemKey, modifiers, timestamp);

}

} // namespace WebKit