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      1 /*
      2  * Copyright (C) 2001 Peter Kelly (pmk (at) post.com)
      3  * Copyright (C) 2001 Tobias Anton (anton (at) stud.fbi.fh-darmstadt.de)
      4  * Copyright (C) 2006 Samuel Weinig (sam.weinig (at) gmail.com)
      5  * Copyright (C) 2003, 2005, 2006, 2008, 2010 Apple Inc. All rights reserved.
      6  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
      7  *
      8  * This library is free software; you can redistribute it and/or
      9  * modify it under the terms of the GNU Library General Public
     10  * License as published by the Free Software Foundation; either
     11  * version 2 of the License, or (at your option) any later version.
     12  *
     13  * This library is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16  * Library General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU Library General Public License
     19  * along with this library; see the file COPYING.LIB.  If not, write to
     20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     21  * Boston, MA 02110-1301, USA.
     22  */
     23 
     24 #include "config.h"
     25 #include "core/events/WheelEvent.h"
     26 
     27 #include "core/clipboard/Clipboard.h"
     28 #include "platform/PlatformWheelEvent.h"
     29 
     30 namespace WebCore {
     31 
     32 WheelEventInit::WheelEventInit()
     33     : deltaX(0)
     34     , deltaY(0)
     35     , deltaZ(0)
     36     , wheelDeltaX(0)
     37     , wheelDeltaY(0)
     38     , deltaMode(WheelEvent::DOM_DELTA_PIXEL)
     39 {
     40 }
     41 
     42 WheelEvent::WheelEvent()
     43     : m_deltaX(0)
     44     , m_deltaY(0)
     45     , m_deltaZ(0)
     46     , m_deltaMode(DOM_DELTA_PIXEL)
     47     , m_directionInvertedFromDevice(false)
     48 {
     49     ScriptWrappable::init(this);
     50 }
     51 
     52 WheelEvent::WheelEvent(const AtomicString& type, const WheelEventInit& initializer)
     53     : MouseEvent(type, initializer)
     54     , m_wheelDelta(initializer.wheelDeltaX ? initializer.wheelDeltaX : -initializer.deltaX, initializer.wheelDeltaY ? initializer.wheelDeltaY : -initializer.deltaY)
     55     , m_deltaX(initializer.deltaX ? initializer.deltaX : -initializer.wheelDeltaX)
     56     , m_deltaY(initializer.deltaY ? initializer.deltaY : -initializer.wheelDeltaY)
     57     , m_deltaZ(initializer.deltaZ)
     58     , m_deltaMode(initializer.deltaMode)
     59 {
     60     ScriptWrappable::init(this);
     61 }
     62 
     63 WheelEvent::WheelEvent(const FloatPoint& wheelTicks, const FloatPoint& rawDelta, unsigned deltaMode,
     64     PassRefPtrWillBeRawPtr<AbstractView> view, const IntPoint& screenLocation, const IntPoint& pageLocation,
     65     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool directionInvertedFromDevice)
     66     : MouseEvent(EventTypeNames::wheel,
     67                  true, true, view, 0, screenLocation.x(), screenLocation.y(),
     68                  pageLocation.x(), pageLocation.y(),
     69                  0, 0,
     70                  ctrlKey, altKey, shiftKey, metaKey, 0, nullptr, nullptr, false)
     71     , m_wheelDelta(wheelTicks.x() * TickMultiplier, wheelTicks.y() * TickMultiplier)
     72     , m_deltaX(-rawDelta.x())
     73     , m_deltaY(-rawDelta.y())
     74     , m_deltaZ(0)
     75     , m_deltaMode(deltaMode)
     76     , m_directionInvertedFromDevice(directionInvertedFromDevice)
     77 {
     78     ScriptWrappable::init(this);
     79 }
     80 
     81 void WheelEvent::initWheelEvent(int rawDeltaX, int rawDeltaY, PassRefPtrWillBeRawPtr<AbstractView> view,
     82                                 int screenX, int screenY, int pageX, int pageY,
     83                                 bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
     84 {
     85     if (dispatched())
     86         return;
     87 
     88     initUIEvent(EventTypeNames::wheel, true, true, view, 0);
     89 
     90     m_screenLocation = IntPoint(screenX, screenY);
     91     m_ctrlKey = ctrlKey;
     92     m_altKey = altKey;
     93     m_shiftKey = shiftKey;
     94     m_metaKey = metaKey;
     95 
     96     m_wheelDelta = IntPoint(rawDeltaX * TickMultiplier, rawDeltaY * TickMultiplier);
     97     m_deltaX = -rawDeltaX;
     98     m_deltaY = -rawDeltaY;
     99     m_deltaMode = DOM_DELTA_PIXEL;
    100     m_directionInvertedFromDevice = false;
    101 
    102     initCoordinates(IntPoint(pageX, pageY));
    103 }
    104 
    105 void WheelEvent::initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, PassRefPtrWillBeRawPtr<AbstractView> view,
    106                                       int screenX, int screenY, int pageX, int pageY,
    107                                       bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
    108 {
    109     initWheelEvent(rawDeltaX, rawDeltaY, view, screenX, screenY, pageX, pageY,
    110                    ctrlKey, altKey, shiftKey, metaKey);
    111 }
    112 
    113 const AtomicString& WheelEvent::interfaceName() const
    114 {
    115     return EventNames::WheelEvent;
    116 }
    117 
    118 bool WheelEvent::isMouseEvent() const
    119 {
    120     return false;
    121 }
    122 
    123 bool WheelEvent::isWheelEvent() const
    124 {
    125     return true;
    126 }
    127 
    128 void WheelEvent::trace(Visitor* visitor)
    129 {
    130     MouseEvent::trace(visitor);
    131 }
    132 
    133 inline static unsigned deltaMode(const PlatformWheelEvent& event)
    134 {
    135     return event.granularity() == ScrollByPageWheelEvent ? WheelEvent::DOM_DELTA_PAGE : WheelEvent::DOM_DELTA_PIXEL;
    136 }
    137 
    138 PassRefPtrWillBeRawPtr<WheelEventDispatchMediator> WheelEventDispatchMediator::create(const PlatformWheelEvent& event, PassRefPtrWillBeRawPtr<AbstractView> view)
    139 {
    140     return adoptRefWillBeNoop(new WheelEventDispatchMediator(event, view));
    141 }
    142 
    143 WheelEventDispatchMediator::WheelEventDispatchMediator(const PlatformWheelEvent& event, PassRefPtrWillBeRawPtr<AbstractView> view)
    144 {
    145     if (!(event.deltaX() || event.deltaY()))
    146         return;
    147 
    148     setEvent(WheelEvent::create(FloatPoint(event.wheelTicksX(), event.wheelTicksY()), FloatPoint(event.deltaX(), event.deltaY()),
    149         deltaMode(event), view, event.globalPosition(), event.position(),
    150         event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), event.directionInvertedFromDevice()));
    151 }
    152 
    153 WheelEvent* WheelEventDispatchMediator::event() const
    154 {
    155     return toWheelEvent(EventDispatchMediator::event());
    156 }
    157 
    158 bool WheelEventDispatchMediator::dispatchEvent(EventDispatcher* dispatcher) const
    159 {
    160     ASSERT(event());
    161     return EventDispatchMediator::dispatchEvent(dispatcher) && !event()->defaultHandled();
    162 }
    163 
    164 } // namespace WebCore
    165