ScrollingStateFixedNode.cpp [plain text]
#include "config.h"
#include "ScrollingStateFixedNode.h"
#include "GraphicsLayer.h"
#include "Logging.h"
#include "ScrollingStateTree.h"
#include <wtf/text/TextStream.h>
#if ENABLE(ASYNC_SCROLLING)
namespace WebCore {
Ref<ScrollingStateFixedNode> ScrollingStateFixedNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
{
return adoptRef(*new ScrollingStateFixedNode(stateTree, nodeID));
}
ScrollingStateFixedNode::ScrollingStateFixedNode(ScrollingStateTree& tree, ScrollingNodeID nodeID)
: ScrollingStateNode(ScrollingNodeType::Fixed, tree, nodeID)
{
}
ScrollingStateFixedNode::ScrollingStateFixedNode(const ScrollingStateFixedNode& node, ScrollingStateTree& adoptiveTree)
: ScrollingStateNode(node, adoptiveTree)
, m_constraints(FixedPositionViewportConstraints(node.viewportConstraints()))
{
}
ScrollingStateFixedNode::~ScrollingStateFixedNode() = default;
Ref<ScrollingStateNode> ScrollingStateFixedNode::clone(ScrollingStateTree& adoptiveTree)
{
return adoptRef(*new ScrollingStateFixedNode(*this, adoptiveTree));
}
void ScrollingStateFixedNode::setPropertyChangedBitsAfterReattach()
{
setPropertyChangedBit(ViewportConstraints);
ScrollingStateNode::setPropertyChangedBitsAfterReattach();
}
void ScrollingStateFixedNode::updateConstraints(const FixedPositionViewportConstraints& constraints)
{
if (m_constraints == constraints)
return;
LOG_WITH_STREAM(Scrolling, stream << "ScrollingStateFixedNode " << scrollingNodeID() << " updateConstraints with viewport rect " << constraints.viewportRectAtLastLayout() << " layer pos at last layout " << constraints.layerPositionAtLastLayout() << " offset from top " << (constraints.layerPositionAtLastLayout().y() - constraints.viewportRectAtLastLayout().y()));
m_constraints = constraints;
setPropertyChanged(ViewportConstraints);
}
void ScrollingStateFixedNode::reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction action)
{
FloatPoint position = m_constraints.layerPositionForViewportRect(viewportRect);
if (layer().representsGraphicsLayer()) {
auto* graphicsLayer = static_cast<GraphicsLayer*>(layer());
LOG_WITH_STREAM(Scrolling, stream << "ScrollingStateFixedNode " << scrollingNodeID() <<" reconcileLayerPositionForViewportRect " << action << " position of layer " << graphicsLayer->primaryLayerID() << " to " << position);
switch (action) {
case ScrollingLayerPositionAction::Set:
graphicsLayer->setPosition(position);
break;
case ScrollingLayerPositionAction::SetApproximate:
graphicsLayer->setApproximatePosition(position);
break;
case ScrollingLayerPositionAction::Sync:
graphicsLayer->syncPosition(position);
break;
}
}
}
void ScrollingStateFixedNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
{
ts << "Fixed node";
ScrollingStateNode::dumpProperties(ts, behavior);
if (m_constraints.anchorEdges()) {
TextStream::GroupScope scope(ts);
ts << "anchor edges: ";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeLeft))
ts << "AnchorEdgeLeft ";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeRight))
ts << "AnchorEdgeRight ";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeTop))
ts << "AnchorEdgeTop";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeBottom))
ts << "AnchorEdgeBottom";
}
if (!m_constraints.alignmentOffset().isEmpty())
ts.dumpProperty("alignment offset", m_constraints.alignmentOffset());
if (!m_constraints.viewportRectAtLastLayout().isEmpty())
ts.dumpProperty("viewport rect at last layout", m_constraints.viewportRectAtLastLayout());
if (m_constraints.layerPositionAtLastLayout() != FloatPoint())
ts.dumpProperty("layer position at last layout", m_constraints.layerPositionAtLastLayout());
}
}
#endif // ENABLE(ASYNC_SCROLLING)