void AsyncScrollingCoordinator::frameViewLayoutUpdated(FrameView* frameView)
{
ASSERT(isMainThread());
ASSERT(m_page);
// If there isn't a root node yet, don't do anything. We'll be called again after creating one.
if (!m_scrollingStateTree->rootStateNode())
return;
// Compute the region of the page that we can't do fast scrolling for. This currently includes
// all scrollable areas, such as subframes, overflow divs and list boxes. We need to do this even if the
// frame view whose layout was updated is not the main frame.
// In the future, we may want to have the ability to set non-fast scrolling regions for more than
// just the root node. But right now, this concept only applies to the root.
if (frameView->frame().isMainFrame())
m_scrollingStateTree->rootStateNode()->setNonFastScrollableRegion(computeNonFastScrollableRegion(&frameView->frame(), IntPoint()));
if (!coordinatesScrollingForFrameView(frameView))
return;
ScrollingStateFrameScrollingNode* node = downcast<ScrollingStateFrameScrollingNode>(m_scrollingStateTree->stateNodeForID(frameView->scrollLayerID()));
if (!node)
return;
Scrollbar* verticalScrollbar = frameView->verticalScrollbar();
Scrollbar* horizontalScrollbar = frameView->horizontalScrollbar();
node->setScrollbarPaintersFromScrollbars(verticalScrollbar, horizontalScrollbar);
node->setFrameScaleFactor(frameView->frame().frameScaleFactor());
node->setHeaderHeight(frameView->headerHeight());
node->setFooterHeight(frameView->footerHeight());
node->setTopContentInset(frameView->topContentInset());
node->setScrollOrigin(frameView->scrollOrigin());
node->setScrollableAreaSize(frameView->visibleContentRect().size());
node->setTotalContentsSize(frameView->totalContentsSize());
node->setReachableContentsSize(frameView->totalContentsSize());
#if ENABLE(CSS_SCROLL_SNAP)
frameView->updateSnapOffsets();
if (const Vector<LayoutUnit>* horizontalSnapOffsets = frameView->horizontalSnapOffsets())
setStateScrollingNodeSnapOffsetsAsFloat(*node, ScrollEventAxis::Horizontal, *horizontalSnapOffsets, m_page->deviceScaleFactor());
if (const Vector<LayoutUnit>* verticalSnapOffsets = frameView->verticalSnapOffsets())
setStateScrollingNodeSnapOffsetsAsFloat(*node, ScrollEventAxis::Vertical, *verticalSnapOffsets, m_page->deviceScaleFactor());
#endif
ScrollableAreaParameters scrollParameters;
scrollParameters.horizontalScrollElasticity = frameView->horizontalScrollElasticity();
scrollParameters.verticalScrollElasticity = frameView->verticalScrollElasticity();
scrollParameters.hasEnabledHorizontalScrollbar = horizontalScrollbar && horizontalScrollbar->enabled();
scrollParameters.hasEnabledVerticalScrollbar = verticalScrollbar && verticalScrollbar->enabled();
scrollParameters.horizontalScrollbarMode = frameView->horizontalScrollbarMode();
scrollParameters.verticalScrollbarMode = frameView->verticalScrollbarMode();
node->setScrollableAreaParameters(scrollParameters);
}
void AsyncScrollingCoordinator::updateScrollSnapPropertiesWithFrameView(const FrameView& frameView)
{
if (auto node = downcast<ScrollingStateFrameScrollingNode>(m_scrollingStateTree->stateNodeForID(frameView.scrollLayerID()))) {
setStateScrollingNodeSnapOffsetsAsFloat(*node, ScrollEventAxis::Horizontal, frameView.horizontalSnapOffsets(), m_page->deviceScaleFactor());
setStateScrollingNodeSnapOffsetsAsFloat(*node, ScrollEventAxis::Vertical, frameView.verticalSnapOffsets(), m_page->deviceScaleFactor());
node->setCurrentHorizontalSnapPointIndex(frameView.currentHorizontalSnapPointIndex());
node->setCurrentVerticalSnapPointIndex(frameView.currentVerticalSnapPointIndex());
}
}
void AsyncScrollingCoordinator::updateOverflowScrollingNode(ScrollingNodeID nodeID, GraphicsLayer* layer, GraphicsLayer* scrolledContentsLayer, const ScrollingGeometry* scrollingGeometry)
{
ScrollingStateOverflowScrollingNode* node = downcast<ScrollingStateOverflowScrollingNode>(m_scrollingStateTree->stateNodeForID(nodeID));
ASSERT(node);
if (!node)
return;
node->setLayer(layer);
node->setScrolledContentsLayer(scrolledContentsLayer);
if (scrollingGeometry) {
node->setScrollOrigin(scrollingGeometry->scrollOrigin);
node->setScrollPosition(scrollingGeometry->scrollPosition);
node->setTotalContentsSize(scrollingGeometry->contentSize);
node->setReachableContentsSize(scrollingGeometry->reachableContentSize);
node->setScrollableAreaSize(scrollingGeometry->scrollableAreaSize);
#if ENABLE(CSS_SCROLL_SNAP)
setStateScrollingNodeSnapOffsetsAsFloat(*node, ScrollEventAxis::Horizontal, scrollingGeometry->horizontalSnapOffsets, m_page->deviceScaleFactor());
setStateScrollingNodeSnapOffsetsAsFloat(*node, ScrollEventAxis::Vertical, scrollingGeometry->verticalSnapOffsets, m_page->deviceScaleFactor());
#endif
}
}
