/* * Copyright (C) 2014 Apple 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: * 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. ``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 * 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. */ #pragma once #include <wtf/RefPtr.h> namespace WebCore { class ContainerNode; class Element; class Frame; class ScrollLatchingState final { public: ScrollLatchingState(); ~ScrollLatchingState(); void clear(); Element* wheelEventElement() { return m_wheelEventElement.get(); } void setWheelEventElement(Element*); Frame* frame() { return m_frame; } void setFrame(Frame* frame) { m_frame = frame; } bool widgetIsLatched() const { return m_widgetIsLatched; } void setWidgetIsLatched(bool isOverWidget); Element* previousWheelScrolledElement() { return m_previousWheelScrolledElement.get(); } void setPreviousWheelScrolledElement(Element*); ContainerNode* scrollableContainer() { return m_scrollableContainer.get(); } void setScrollableContainer(ContainerNode*); bool startedGestureAtScrollLimit() const { return m_startedGestureAtScrollLimit; } void setStartedGestureAtScrollLimit(bool startedAtLimit) { m_startedGestureAtScrollLimit = startedAtLimit; } private: RefPtr<Element> m_wheelEventElement; RefPtr<Element> m_previousWheelScrolledElement; RefPtr<ContainerNode> m_scrollableContainer; Frame* m_frame { nullptr }; bool m_widgetIsLatched { false }; bool m_startedGestureAtScrollLimit { false }; }; } // namespace WebCore