xref: /external/chromium_org/third_party/WebKit/Source/core/events/GestureEvent.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    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 THE COPYRIGHT HOLDERS ``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 COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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#include "config.h"
#include "core/dom/Element.h"
#include "core/events/GestureEvent.h"
#include "wtf/text/AtomicString.h"

namespace blink {

PassRefPtrWillBeRawPtr<GestureEvent> GestureEvent::create(PassRefPtrWillBeRawPtr<AbstractView> view, const PlatformGestureEvent& event)
{
    AtomicString eventType;
    float deltaX = 0;
    float deltaY = 0;
    switch (event.type()) {
    case PlatformEvent::GestureScrollBegin:
        eventType = EventTypeNames::gesturescrollstart; break;
    case PlatformEvent::GestureScrollEnd:
        eventType = EventTypeNames::gesturescrollend; break;
    case PlatformEvent::GestureScrollUpdate:
    case PlatformEvent::GestureScrollUpdateWithoutPropagation:
        // Only deltaX/Y are used when converting this
        // back to a PlatformGestureEvent.
        eventType = EventTypeNames::gesturescrollupdate;
        deltaX = event.deltaX();
        deltaY = event.deltaY();
        break;
    case PlatformEvent::GestureTap:
        eventType = EventTypeNames::gesturetap; break;
    case PlatformEvent::GestureTapUnconfirmed:
        eventType = EventTypeNames::gesturetapunconfirmed; break;
    case PlatformEvent::GestureTapDown:
        eventType = EventTypeNames::gesturetapdown; break;
    case PlatformEvent::GestureShowPress:
        eventType = EventTypeNames::gestureshowpress; break;
    case PlatformEvent::GestureTwoFingerTap:
    case PlatformEvent::GestureLongPress:
    case PlatformEvent::GesturePinchBegin:
    case PlatformEvent::GesturePinchEnd:
    case PlatformEvent::GesturePinchUpdate:
    case PlatformEvent::GestureTapDownCancel:
    default:
        return nullptr;
    }
    return adoptRefWillBeNoop(new GestureEvent(eventType, view, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(), event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), deltaX, deltaY));
}

const AtomicString& GestureEvent::interfaceName() const
{
    // FIXME: when a GestureEvent.idl interface is defined, return the string "GestureEvent".
    // Until that happens, do not advertise an interface that does not exist, since it will
    // trip up the bindings integrity checks.
    return UIEvent::interfaceName();
}

bool GestureEvent::isGestureEvent() const
{
    return true;
}

GestureEvent::GestureEvent()
    : m_deltaX(0)
    , m_deltaY(0)
{
}

GestureEvent::GestureEvent(const AtomicString& type, PassRefPtrWillBeRawPtr<AbstractView> view, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, float deltaX, float deltaY)
    : MouseRelatedEvent(type, true, true, view, 0, IntPoint(screenX, screenY), IntPoint(clientX, clientY), IntPoint(0, 0), ctrlKey, altKey, shiftKey, metaKey)
    , m_deltaX(deltaX)
    , m_deltaY(deltaY)
{
}

void GestureEvent::trace(Visitor* visitor)
{
    MouseRelatedEvent::trace(visitor);
}

GestureEventDispatchMediator::GestureEventDispatchMediator(PassRefPtrWillBeRawPtr<GestureEvent> gestureEvent)
    : EventDispatchMediator(gestureEvent)
{
}

GestureEvent* GestureEventDispatchMediator::event() const
{
    return toGestureEvent(EventDispatchMediator::event());
}

bool GestureEventDispatchMediator::dispatchEvent(EventDispatcher* dispatcher) const
{
    dispatcher->dispatch();
    ASSERT(!event()->defaultPrevented());
    return event()->defaultHandled() || event()->defaultPrevented();
}

} // namespace blink