bool ArgumentCoder<ScrollingStateStickyNode>::decode(ArgumentDecoder& decoder, ScrollingStateStickyNode& node)
{
if (!decoder.decode(static_cast<ScrollingStateNode&>(node)))
return false;
if (node.hasChangedProperty(ScrollingStateStickyNode::ViewportConstraints)) {
StickyPositionViewportConstraints decodedValue;
if (!decoder.decode(decodedValue))
return false;
node.updateConstraints(decodedValue);
}
return true;
}
void AsyncScrollingCoordinator::updateViewportConstrainedNode(ScrollingNodeID nodeID, const ViewportConstraints& constraints, GraphicsLayer* graphicsLayer)
{
ASSERT(supportsFixedPositionLayers());
ScrollingStateNode* node = m_scrollingStateTree->stateNodeForID(nodeID);
if (!node)
return;
switch (constraints.constraintType()) {
case ViewportConstraints::FixedPositionConstraint: {
ScrollingStateFixedNode* fixedNode = toScrollingStateFixedNode(node);
fixedNode->setLayer(graphicsLayer);
fixedNode->updateConstraints((const FixedPositionViewportConstraints&)constraints);
break;
}
case ViewportConstraints::StickyPositionConstraint: {
ScrollingStateStickyNode* stickyNode = toScrollingStateStickyNode(node);
stickyNode->setLayer(graphicsLayer);
stickyNode->updateConstraints((const StickyPositionViewportConstraints&)constraints);
break;
}
}
}
