/* * Copyright (C) 2017 Igalia S.L. 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. 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. */ #pragma once #if PLATFORM(IOS) && ENABLE(ASYNC_SCROLLING) namespace WebCore { class FloatPoint; class FloatSize; class IntPoint; class ScrollingTreeScrollingNode; class ScrollingTree; class ScrollingTreeScrollingNodeDelegate { public: WEBCORE_EXPORT explicit ScrollingTreeScrollingNodeDelegate(ScrollingTreeScrollingNode&); WEBCORE_EXPORT virtual ~ScrollingTreeScrollingNodeDelegate(); ScrollingTreeScrollingNode& scrollingNode() { return m_scrollingNode; } const ScrollingTreeScrollingNode& scrollingNode() const { return m_scrollingNode; } protected: WEBCORE_EXPORT ScrollingTree& scrollingTree() const; WEBCORE_EXPORT FloatPoint lastCommittedScrollPosition() const; WEBCORE_EXPORT const FloatSize& totalContentsSize(); WEBCORE_EXPORT const FloatSize& reachableContentsSize(); WEBCORE_EXPORT const IntPoint& scrollOrigin() const; private: ScrollingTreeScrollingNode& m_scrollingNode; }; } // namespace WebCore #endif // PLATFORM(IOS) && ENABLE(ASYNC_SCROLLING)