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/*
* Copyright (C) 2019 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. 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.
*/
#include "config.h"
#include "ScrollingTreeFrameHostingNode.h"
#if ENABLE(ASYNC_SCROLLING)
#include "Logging.h"
#include "ScrollingStateFrameHostingNode.h"
#include "ScrollingStateTree.h"
#include "ScrollingTree.h"
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(ScrollingTreeFrameHostingNode);
Ref<ScrollingTreeFrameHostingNode> ScrollingTreeFrameHostingNode::create(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
{
return adoptRef(*new ScrollingTreeFrameHostingNode(scrollingTree, nodeID));
}
ScrollingTreeFrameHostingNode::ScrollingTreeFrameHostingNode(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
: ScrollingTreeNode(scrollingTree, ScrollingNodeType::FrameHosting, nodeID)
{
ASSERT(isFrameHostingNode());
}
ScrollingTreeFrameHostingNode::~ScrollingTreeFrameHostingNode() = default;
bool ScrollingTreeFrameHostingNode::commitStateBeforeChildren(const ScrollingStateNode& stateNode)
{
auto* state = dynamicDowncast<ScrollingStateFrameHostingNode>(stateNode);
if (!state)
return false;
if (state->hasChangedProperty(ScrollingStateNode::Property::LayerHostingContextIdentifier))
setLayerHostingContextIdentifier(state->layerHostingContextIdentifier());
return true;
}
void ScrollingTreeFrameHostingNode::setLayerHostingContextIdentifier(std::optional<LayerHostingContextIdentifier> identifier)
{
if (m_hostingContext != identifier)
removeHostedChildren();
m_hostingContext = identifier;
if (m_hostingContext)
scrollingTree()->addScrollingNodeToHostedSubtreeMap(*m_hostingContext, *this);
}
void ScrollingTreeFrameHostingNode::removeHostedChildren()
{
auto hostedChildren = std::exchange(m_hostedChildren, { });
for (auto& children : hostedChildren)
scrollingTree()->removeNode(children->scrollingNodeID());
}
void ScrollingTreeFrameHostingNode::willBeDestroyed()
{
if (m_hostingContext)
scrollingTree()->removeFrameHostingNode(*m_hostingContext);
removeHostedChildren();
}
void ScrollingTreeFrameHostingNode::removeHostedChild(RefPtr<ScrollingTreeNode> node)
{
if (node) {
m_hostedChildren.remove(node);
m_children.removeFirst(node.releaseNonNull());
}
}
void ScrollingTreeFrameHostingNode::applyLayerPositions()
{
}
void ScrollingTreeFrameHostingNode::dumpProperties(TextStream& ts, OptionSet<ScrollingStateTreeAsTextBehavior> behavior) const
{
ts << "frame hosting node";
if (auto hostingContextIdentifier = m_hostingContext) {
if (behavior & ScrollingStateTreeAsTextBehavior::IncludeNodeIDs)
ts.dumpProperty("hosting context identifier", *m_hostingContext);
else
ts.dumpProperty("has hosting context identifier", "");
}
ScrollingTreeNode::dumpProperties(ts, behavior);
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING)
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