1/* 2 * Copyright (C) 2014 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef ScrollingTreeOverflowScrollingNodeIOS_h 27#define ScrollingTreeOverflowScrollingNodeIOS_h 28 29#if ENABLE(ASYNC_SCROLLING) && PLATFORM(IOS) 30 31#include <WebCore/ScrollingCoordinator.h> 32#include <WebCore/ScrollingTreeOverflowScrollingNode.h> 33 34OBJC_CLASS WKOverflowScrollViewDelegate; 35 36namespace WebKit { 37 38class ScrollingTreeOverflowScrollingNodeIOS : public WebCore::ScrollingTreeOverflowScrollingNode { 39public: 40 static PassRefPtr<ScrollingTreeOverflowScrollingNodeIOS> create(WebCore::ScrollingTree&, WebCore::ScrollingNodeID); 41 virtual ~ScrollingTreeOverflowScrollingNodeIOS(); 42 43 void overflowScrollWillStart(); 44 void overflowScrollDidEnd(); 45 void overflowScrollViewWillStartPanGesture(); 46 void scrollViewDidScroll(const WebCore::FloatPoint&, bool inUserInteration); 47 48 CALayer *scrollLayer() const { return m_scrollLayer.get(); } 49 50private: 51 ScrollingTreeOverflowScrollingNodeIOS(WebCore::ScrollingTree&, WebCore::ScrollingNodeID); 52 53 virtual void updateBeforeChildren(const WebCore::ScrollingStateNode&) override; 54 virtual void updateAfterChildren(const WebCore::ScrollingStateNode&) override; 55 56 virtual WebCore::FloatPoint scrollPosition() const override; 57 58 virtual void setScrollLayerPosition(const WebCore::FloatPoint&) override; 59 60 virtual void updateLayersAfterViewportChange(const WebCore::FloatRect& fixedPositionRect, double scale) { } 61 virtual void updateLayersAfterDelegatedScroll(const WebCore::FloatPoint& scrollPosition) override; 62 63 virtual void updateLayersAfterAncestorChange(const WebCore::ScrollingTreeNode& changedNode, const WebCore::FloatRect& fixedPositionRect, const WebCore::FloatSize& cumulativeDelta) override; 64 65 virtual void handleWheelEvent(const WebCore::PlatformWheelEvent&) override { } 66 67 void updateChildNodesAfterScroll(const WebCore::FloatPoint&); 68 69 RetainPtr<CALayer> m_scrollLayer; 70 RetainPtr<CALayer> m_scrolledContentsLayer; 71 72 RetainPtr<WKOverflowScrollViewDelegate> m_scrollViewDelegate; 73 bool m_updatingFromStateNode; 74}; 75 76} // namespace WebKit 77 78#endif // ENABLE(ASYNC_SCROLLING) && PLATFORM(IOS) 79 80#endif // ScrollingTreeOverflowScrollingNodeIOS_h 81