void ScrollingCoordinatorCoordinatedGraphics::scrollableAreaScrollLayerDidChange(ScrollableArea& scrollableArea)
{
CoordinatedGraphicsLayer* layer = toCoordinatedGraphicsLayer(scrollLayerForScrollableArea(scrollableArea));
if (!layer)
return;
layer->setScrollableArea(&scrollableArea);
}
void ScrollingCoordinatorCoordinatedGraphics::willDestroyScrollableArea(ScrollableArea& scrollableArea)
{
CoordinatedGraphicsLayer* layer = toCoordinatedGraphicsLayer(scrollLayerForScrollableArea(scrollableArea));
if (!layer)
return;
layer->setScrollableArea(nullptr);
}
void ScrollingCoordinatorChromium::scrollableAreaScrollLayerDidChange(ScrollableArea* scrollableArea)
{
GraphicsLayerChromium* scrollLayer = static_cast<GraphicsLayerChromium*>(scrollLayerForScrollableArea(scrollableArea));
if (scrollLayer)
scrollLayer->setScrollableArea(scrollableArea);
WebLayer* webLayer = scrollingWebLayerForScrollableArea(scrollableArea);
if (webLayer) {
webLayer->setScrollable(true);
webLayer->setScrollPosition(IntPoint(scrollableArea->scrollPosition() - scrollableArea->minimumScrollPosition()));
webLayer->setMaxScrollPosition(IntSize(scrollableArea->scrollSize(HorizontalScrollbar), scrollableArea->scrollSize(VerticalScrollbar)));
}
if (WebScrollbarLayer* scrollbarLayer = getWebScrollbarLayer(scrollableArea, HorizontalScrollbar))
setupScrollbarLayer(horizontalScrollbarLayerForScrollableArea(scrollableArea), scrollbarLayer, webLayer);
if (WebScrollbarLayer* scrollbarLayer = getWebScrollbarLayer(scrollableArea, VerticalScrollbar))
setupScrollbarLayer(verticalScrollbarLayerForScrollableArea(scrollableArea), scrollbarLayer, webLayer);
}
WebLayer* ScrollingCoordinatorChromium::scrollingWebLayerForScrollableArea(ScrollableArea* scrollableArea)
{
GraphicsLayer* graphicsLayer = scrollLayerForScrollableArea(scrollableArea);
return graphicsLayer ? scrollingWebLayerForGraphicsLayer(graphicsLayer) : 0;
}