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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
* Copyright (C) 2019, 2024 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 "ScrollingTreePositionedNodeCoordinated.h"
#if ENABLE(ASYNC_SCROLLING) && USE(COORDINATED_GRAPHICS)
#include "CoordinatedPlatformLayer.h"
#include "Logging.h"
#include "ScrollingStatePositionedNode.h"
#include "ScrollingThread.h"
#include "ScrollingTree.h"
namespace WebCore {
Ref<ScrollingTreePositionedNodeCoordinated> ScrollingTreePositionedNodeCoordinated::create(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
{
return adoptRef(*new ScrollingTreePositionedNodeCoordinated(scrollingTree, nodeID));
}
ScrollingTreePositionedNodeCoordinated::ScrollingTreePositionedNodeCoordinated(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
: ScrollingTreePositionedNode(scrollingTree, nodeID)
{
}
ScrollingTreePositionedNodeCoordinated::~ScrollingTreePositionedNodeCoordinated() = default;
bool ScrollingTreePositionedNodeCoordinated::commitStateBeforeChildren(const ScrollingStateNode& stateNode)
{
if (stateNode.hasChangedProperty(ScrollingStateNode::Property::Layer))
m_layer = static_cast<CoordinatedPlatformLayer*>(stateNode.layer());
return ScrollingTreePositionedNode::commitStateBeforeChildren(stateNode);
}
void ScrollingTreePositionedNodeCoordinated::applyLayerPositions()
{
FloatSize delta = scrollDeltaSinceLastCommit();
FloatPoint layerPosition = m_constraints.layerPositionAtLastLayout() - delta;
LOG_WITH_STREAM(Scrolling, stream << "ScrollingTreePositionedNode " << scrollingNodeID() << " applyLayerPositions: overflow delta " << delta << " moving layer to " << layerPosition);
// Match the behavior of ScrollingTreeFrameScrollingNodeCoordinated::repositionScrollingLayers().
CoordinatedPlatformLayer::ForcePositionSync forceSync = ScrollingThread::isCurrentThread() && !scrollingTree()->isScrollingSynchronizedWithMainThread() ?
CoordinatedPlatformLayer::ForcePositionSync::Yes : CoordinatedPlatformLayer::ForcePositionSync::No;
m_layer->setTopLeftPositionForScrolling(layerPosition - m_constraints.alignmentOffset(), forceSync);
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING) && USE(COORDINATED_GRAPHICS)
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