bool ArgumentCoder<ScrollingStateScrollingNode>::decode(ArgumentDecoder& decoder, ScrollingStateScrollingNode& node)
{
if (!decoder.decode(static_cast<ScrollingStateNode&>(node)))
return false;
SCROLLING_NODE_DECODE(ViewportSize, FloatSize, setViewportSize);
SCROLLING_NODE_DECODE(TotalContentsSize, IntSize, setTotalContentsSize);
SCROLLING_NODE_DECODE(ScrollPosition, FloatPoint, setScrollPosition);
SCROLLING_NODE_DECODE(ScrollOrigin, IntPoint, setScrollOrigin);
SCROLLING_NODE_DECODE(FrameScaleFactor, float, setFrameScaleFactor);
SCROLLING_NODE_DECODE(NonFastScrollableRegion, Region, setNonFastScrollableRegion);
SCROLLING_NODE_DECODE(WheelEventHandlerCount, int, setWheelEventHandlerCount);
SCROLLING_NODE_DECODE(ReasonsForSynchronousScrolling, SynchronousScrollingReasons, setSynchronousScrollingReasons);
SCROLLING_NODE_DECODE(ScrollableAreaParams, ScrollableAreaParameters, setScrollableAreaParameters);
SCROLLING_NODE_DECODE_ENUM(BehaviorForFixedElements, ScrollBehaviorForFixedElements, setScrollBehaviorForFixedElements);
if (node.hasChangedProperty(ScrollingStateScrollingNode::RequestedScrollPosition)) {
FloatPoint scrollPosition;
if (!decoder.decode(scrollPosition))
return false;
bool representsProgrammaticScroll;
if (!decoder.decode(representsProgrammaticScroll))
return false;
node.setRequestedScrollPosition(scrollPosition, representsProgrammaticScroll);
}
SCROLLING_NODE_DECODE(HeaderHeight, int, setHeaderHeight);
SCROLLING_NODE_DECODE(FooterHeight, int, setFooterHeight);
SCROLLING_NODE_DECODE(TopContentInset, float, setTopContentInset);
if (node.hasChangedProperty(ScrollingStateScrollingNode::ScrolledContentsLayer)) {
GraphicsLayer::PlatformLayerID layerID;
if (!decoder.decode(layerID))
return false;
node.setScrolledContentsLayer(layerID);
}
if (node.hasChangedProperty(ScrollingStateScrollingNode::CounterScrollingLayer)) {
GraphicsLayer::PlatformLayerID layerID;
if (!decoder.decode(layerID))
return false;
node.setCounterScrollingLayer(layerID);
}
return true;
}
bool AsyncScrollingCoordinator::requestScrollPositionUpdate(FrameView* frameView, const IntPoint& scrollPosition)
{
ASSERT(isMainThread());
ASSERT(m_page);
if (!coordinatesScrollingForFrameView(frameView))
return false;
if (frameView->inProgrammaticScroll() || frameView->frame().document()->inPageCache())
updateScrollPositionAfterAsyncScroll(frameView->scrollLayerID(), scrollPosition, frameView->inProgrammaticScroll(), SetScrollingLayerPosition);
// If this frame view's document is being put into the page cache, we don't want to update our
// main frame scroll position. Just let the FrameView think that we did.
if (frameView->frame().document()->inPageCache())
return true;
ScrollingStateScrollingNode* stateNode = toScrollingStateScrollingNode(m_scrollingStateTree->stateNodeForID(frameView->scrollLayerID()));
if (!stateNode)
return false;
stateNode->setRequestedScrollPosition(scrollPosition, frameView->inProgrammaticScroll());
return true;
}
