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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
* Copyright (C) 2019 Igalia S.L.
*
* 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* HOLDER OR 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 "ScrollingTreePositionedNode.h"
#if ENABLE(ASYNC_SCROLLING) && USE(NICOSIA)
#include "Logging.h"
#include "NicosiaPlatformLayer.h"
#include "ScrollingStatePositionedNode.h"
#include "ScrollingTree.h"
#include "ScrollingTreeOverflowScrollingNode.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
Ref<ScrollingTreePositionedNode> ScrollingTreePositionedNode::create(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
{
return adoptRef(*new ScrollingTreePositionedNode(scrollingTree, nodeID));
}
ScrollingTreePositionedNode::ScrollingTreePositionedNode(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
: ScrollingTreeNode(scrollingTree, ScrollingNodeType::Positioned, nodeID)
{
}
ScrollingTreePositionedNode::~ScrollingTreePositionedNode() = default;
void ScrollingTreePositionedNode::commitStateBeforeChildren(const ScrollingStateNode& stateNode)
{
const ScrollingStatePositionedNode& positionedStateNode = downcast<ScrollingStatePositionedNode>(stateNode);
if (positionedStateNode.hasChangedProperty(ScrollingStateNode::Property::Layer)) {
auto* layer = static_cast<Nicosia::PlatformLayer*>(positionedStateNode.layer());
m_layer = downcast<Nicosia::CompositionLayer>(layer);
}
if (positionedStateNode.hasChangedProperty(ScrollingStateNode::Property::RelatedOverflowScrollingNodes))
m_relatedOverflowScrollingNodes = positionedStateNode.relatedOverflowScrollingNodes();
if (positionedStateNode.hasChangedProperty(ScrollingStateNode::Property::LayoutConstraintData))
m_constraints = positionedStateNode.layoutConstraints();
if (!m_relatedOverflowScrollingNodes.isEmpty())
scrollingTree().activePositionedNodes().add(*this);
}
void ScrollingTreePositionedNode::applyLayerPositions()
{
FloatSize delta;
for (auto nodeID : m_relatedOverflowScrollingNodes) {
if (auto* node = scrollingTree().nodeForID(nodeID)) {
if (is<ScrollingTreeOverflowScrollingNode>(node)) {
auto& overflowNode = downcast<ScrollingTreeOverflowScrollingNode>(*node);
delta += overflowNode.scrollDeltaSinceLastCommit();
}
}
}
FloatPoint layerPosition = m_constraints.layerPositionAtLastLayout() + delta;
LOG_WITH_STREAM(Scrolling, stream << "ScrollingTreePositionedNode " << scrollingNodeID() << " applyLayerPositions: overflow delta " << delta << " moving layer to " << layerPosition);
layerPosition -= m_constraints.alignmentOffset();
ASSERT(m_layer);
m_layer->updateState(
[&layerPosition](Nicosia::CompositionLayer::LayerState& state)
{
state.position = layerPosition;
state.delta.positionChanged = true;
});
}
void ScrollingTreePositionedNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
{
ts << "positioned node";
ScrollingTreeNode::dumpProperties(ts, behavior);
ts.dumpProperty("layout constraints", m_constraints);
ts.dumpProperty("related overflow nodes", m_relatedOverflowScrollingNodes.size());
if (behavior & ScrollingStateTreeAsTextBehaviorIncludeNodeIDs) {
if (!m_relatedOverflowScrollingNodes.isEmpty()) {
TextStream::GroupScope scope(ts);
ts << "overflow nodes";
for (auto nodeID : m_relatedOverflowScrollingNodes)
ts << "\n" << indent << "nodeID " << nodeID;
}
}
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING) && USE(NICOSIA)
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