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#include "config.h" 27 28#if ENABLE(ASYNC_SCROLLING) 29 30#import "ScrollingCoordinatorIOS.h" 31 32#include "FrameView.h" 33#include "MainFrame.h" 34#include "Page.h" 35#include "Region.h" 36#include "ScrollingStateTree.h" 37#include "ScrollingThread.h" 38#include "ScrollingTreeFixedNode.h" 39#include "ScrollingTreeFrameScrollingNodeIOS.h" 40#include "ScrollingTreeStickyNode.h" 41#include "ScrollingTreeIOS.h" 42#include <wtf/Functional.h> 43#include <wtf/MainThread.h> 44#include <wtf/PassRefPtr.h> 45 46namespace WebCore { 47 48PassRefPtr<ScrollingCoordinator> ScrollingCoordinator::create(Page* page) 49{ 50 return adoptRef(new ScrollingCoordinatorIOS(page)); 51} 52 53ScrollingCoordinatorIOS::ScrollingCoordinatorIOS(Page* page) 54 : AsyncScrollingCoordinator(page) 55 , m_scrollingStateTreeCommitterTimer(this, &ScrollingCoordinatorIOS::scrollingStateTreeCommitterTimerFired) 56{ 57 setScrollingTree(ScrollingTreeIOS::create(this)); 58} 59 60ScrollingCoordinatorIOS::~ScrollingCoordinatorIOS() 61{ 62 ASSERT(!scrollingTree()); 63} 64 65void ScrollingCoordinatorIOS::pageDestroyed() 66{ 67 AsyncScrollingCoordinator::pageDestroyed(); 68 69 m_scrollingStateTreeCommitterTimer.stop(); 70 71 // Invalidating the scrolling tree will break the reference cycle between the ScrollingCoordinator and ScrollingTree objects. 72 releaseScrollingTree(); 73} 74 75void ScrollingCoordinatorIOS::commitTreeStateIfNeeded() 76{ 77 if (!scrollingStateTree()->hasChangedProperties()) 78 return; 79 80 commitTreeState(); 81 m_scrollingStateTreeCommitterTimer.stop(); 82} 83 84void ScrollingCoordinatorIOS::scheduleTreeStateCommit() 85{ 86 ASSERT(scrollingStateTree()->hasChangedProperties()); 87 88 if (m_scrollingStateTreeCommitterTimer.isActive()) 89 return; 90 91 m_scrollingStateTreeCommitterTimer.startOneShot(0); 92} 93 94void ScrollingCoordinatorIOS::scrollingStateTreeCommitterTimerFired(Timer<ScrollingCoordinatorIOS>*) 95{ 96 commitTreeState(); 97} 98 99void ScrollingCoordinatorIOS::commitTreeState() 100{ 101 ASSERT(scrollingStateTree()->hasChangedProperties()); 102 103 OwnPtr<ScrollingStateTree> treeState = scrollingStateTree()->commit(LayerRepresentation::PlatformLayerRepresentation); 104 // FIXME: figure out how to commit. 105} 106 107 108} // namespace WebCore 109 110#endif // ENABLE(ASYNC_SCROLLING) 111