115 lines
4.2 KiB
C++
115 lines
4.2 KiB
C++
/*
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* Copyright (C) 2001 Peter Kelly (pmk@post.com)
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* Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
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* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
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* Copyright (C) 2003, 2005, 2006, 2008, 2010, 2013 Apple Inc. All rights reserved.
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* Copyright (C) 2013 Samsung Electronics. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "WheelEvent.h"
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#include "DataTransfer.h"
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#include "EventNames.h"
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/MathExtras.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(WheelEvent);
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inline static unsigned determineDeltaMode(const PlatformWheelEvent& event)
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{
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return event.granularity() == ScrollByPageWheelEvent ? WheelEvent::DOM_DELTA_PAGE : WheelEvent::DOM_DELTA_PIXEL;
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}
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static double wheelDeltaToDelta(int wheelDelta)
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{
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// Avoid returning negative zero.
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if (!wheelDelta)
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return 0;
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return -static_cast<double>(wheelDelta);
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}
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inline WheelEvent::WheelEvent() = default;
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inline WheelEvent::WheelEvent(const AtomString& type, const Init& initializer)
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: MouseEvent(type, initializer)
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, m_wheelDelta(initializer.wheelDeltaX ? initializer.wheelDeltaX : clampTo<int>(-initializer.deltaX), initializer.wheelDeltaY ? initializer.wheelDeltaY : clampTo<int>(-initializer.deltaY))
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, m_deltaX(initializer.deltaX ? initializer.deltaX : wheelDeltaToDelta(initializer.wheelDeltaX))
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, m_deltaY(initializer.deltaY ? initializer.deltaY : wheelDeltaToDelta(initializer.wheelDeltaY))
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, m_deltaZ(initializer.deltaZ)
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, m_deltaMode(initializer.deltaMode)
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{
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}
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inline WheelEvent::WheelEvent(const PlatformWheelEvent& event, RefPtr<WindowProxy>&& view, IsCancelable isCancelable)
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: MouseEvent(eventNames().wheelEvent, CanBubble::Yes, isCancelable, IsComposed::Yes, event.timestamp().approximateMonotonicTime(), WTFMove(view), 0,
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event.globalPosition(), event.position() , { }, event.modifiers(), 0, 0, nullptr, 0, 0, IsSimulated::No, IsTrusted::Yes)
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, m_wheelDelta(event.wheelTicksX() * TickMultiplier, event.wheelTicksY() * TickMultiplier)
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, m_deltaX(-event.deltaX())
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, m_deltaY(-event.deltaY())
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, m_deltaMode(determineDeltaMode(event))
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, m_underlyingPlatformEvent(event)
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{
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}
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Ref<WheelEvent> WheelEvent::create(const PlatformWheelEvent& event, RefPtr<WindowProxy>&& view, IsCancelable isCancelable)
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{
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return adoptRef(*new WheelEvent(event, WTFMove(view), isCancelable));
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}
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Ref<WheelEvent> WheelEvent::createForBindings()
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{
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return adoptRef(*new WheelEvent);
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}
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Ref<WheelEvent> WheelEvent::create(const AtomString& type, const Init& initializer)
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{
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return adoptRef(*new WheelEvent(type, initializer));
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}
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void WheelEvent::initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, RefPtr<WindowProxy>&& view, int screenX, int screenY, int pageX, int pageY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
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{
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if (isBeingDispatched())
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return;
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initMouseEvent(eventNames().wheelEvent, true, true, WTFMove(view), 0, screenX, screenY, pageX, pageY, ctrlKey, altKey, shiftKey, metaKey, 0, nullptr);
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// Normalize to 120 multiple for compatibility with IE.
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m_wheelDelta = { rawDeltaX * TickMultiplier, rawDeltaY * TickMultiplier };
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m_deltaX = wheelDeltaToDelta(rawDeltaX);
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m_deltaY = wheelDeltaToDelta(rawDeltaY);
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m_deltaMode = DOM_DELTA_PIXEL;
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m_underlyingPlatformEvent = std::nullopt;
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}
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EventInterface WheelEvent::eventInterface() const
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{
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return WheelEventInterfaceType;
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}
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bool WheelEvent::isWheelEvent() const
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{
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return true;
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}
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} // namespace WebCore
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