ScrollingTreeOverflowScrollingNodeIOS.mm   [plain text]


/*
 * Copyright (C) 2014 Apple Inc. All rights reserved.
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 *
 * 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
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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#import "config.h"
#import "ScrollingTreeOverflowScrollingNodeIOS.h"

#if PLATFORM(IOS_FAMILY)
#if ENABLE(ASYNC_SCROLLING)

#import "ScrollingTreeScrollingNodeDelegateIOS.h"

#import <WebCore/ScrollingStateOverflowScrollingNode.h>

namespace WebKit {
using namespace WebCore;

Ref<ScrollingTreeOverflowScrollingNodeIOS> ScrollingTreeOverflowScrollingNodeIOS::create(WebCore::ScrollingTree& scrollingTree, WebCore::ScrollingNodeID nodeID)
{
    return adoptRef(*new ScrollingTreeOverflowScrollingNodeIOS(scrollingTree, nodeID));
}

ScrollingTreeOverflowScrollingNodeIOS::ScrollingTreeOverflowScrollingNodeIOS(WebCore::ScrollingTree& scrollingTree, WebCore::ScrollingNodeID nodeID)
    : ScrollingTreeOverflowScrollingNode(scrollingTree, nodeID)
    , m_scrollingNodeDelegate(makeUnique<ScrollingTreeScrollingNodeDelegateIOS>(*this))
{
}

ScrollingTreeOverflowScrollingNodeIOS::~ScrollingTreeOverflowScrollingNodeIOS()
{
}

UIScrollView* ScrollingTreeOverflowScrollingNodeIOS::scrollView() const
{
    return m_scrollingNodeDelegate->scrollView();
}

void ScrollingTreeOverflowScrollingNodeIOS::commitStateBeforeChildren(const WebCore::ScrollingStateNode& stateNode)
{
    if (stateNode.hasChangedProperty(ScrollingStateScrollingNode::ScrollContainerLayer))
        m_scrollingNodeDelegate->resetScrollViewDelegate();

    ScrollingTreeOverflowScrollingNode::commitStateBeforeChildren(stateNode);
    m_scrollingNodeDelegate->commitStateBeforeChildren(downcast<ScrollingStateScrollingNode>(stateNode));
}

void ScrollingTreeOverflowScrollingNodeIOS::commitStateAfterChildren(const ScrollingStateNode& stateNode)
{
    ScrollingTreeOverflowScrollingNode::commitStateAfterChildren(stateNode);

    const auto& scrollingStateNode = downcast<ScrollingStateScrollingNode>(stateNode);
    m_scrollingNodeDelegate->commitStateAfterChildren(scrollingStateNode);
}

void ScrollingTreeOverflowScrollingNodeIOS::repositionScrollingLayers()
{
    m_scrollingNodeDelegate->repositionScrollingLayers();
}

} // namespace WebKit

#endif // ENABLE(ASYNC_SCROLLING)
#endif // PLATFORM(IOS_FAMILY)