void ScrollingCoordinatorCoordinatedGraphics::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: {
toCoordinatedGraphicsLayer(graphicsLayer)->setFixedToViewport(true); // FIXME : Use constraints!
downcast<ScrollingStateFixedNode>(*node).setLayer(graphicsLayer);
break;
}
case ViewportConstraints::StickyPositionConstraint:
break; // FIXME : Support sticky elements.
default:
ASSERT_NOT_REACHED();
}
}
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 = downcast<ScrollingStateFixedNode>(*node);
fixedNode.setLayer(graphicsLayer);
fixedNode.updateConstraints((const FixedPositionViewportConstraints&)constraints);
break;
}
case ViewportConstraints::StickyPositionConstraint: {
ScrollingStateStickyNode& stickyNode = downcast<ScrollingStateStickyNode>(*node);
stickyNode.setLayer(graphicsLayer);
stickyNode.updateConstraints((const StickyPositionViewportConstraints&)constraints);
break;
}
}
}