void ScrollableAreaPainter::paintOverflowControls(
GraphicsContext& context,
const IntPoint& paintOffset,
const CullRect& cullRect,
bool paintingOverlayControls) {
// Don't do anything if we have no overflow.
if (!getScrollableArea().box().hasOverflowClip())
return;
IntPoint adjustedPaintOffset = paintOffset;
if (paintingOverlayControls)
adjustedPaintOffset = getScrollableArea().cachedOverlayScrollbarOffset();
CullRect adjustedCullRect(cullRect, -adjustedPaintOffset);
// Overlay scrollbars paint in a second pass through the layer tree so that
// they will paint on top of everything else. If this is the normal painting
// pass, paintingOverlayControls will be false, and we should just tell the
// root layer that there are overlay scrollbars that need to be painted. That
// will cause the second pass through the layer tree to run, and we'll paint
// the scrollbars then. In the meantime, cache tx and ty so that the second
// pass doesn't need to re-enter the LayoutTree to get it right.
if (getScrollableArea().hasOverlayScrollbars() && !paintingOverlayControls) {
getScrollableArea().setCachedOverlayScrollbarOffset(paintOffset);
// It's not necessary to do the second pass if the scrollbars paint into
// layers.
if ((getScrollableArea().horizontalScrollbar() &&
getScrollableArea().layerForHorizontalScrollbar()) ||
(getScrollableArea().verticalScrollbar() &&
getScrollableArea().layerForVerticalScrollbar()))
return;
if (!overflowControlsIntersectRect(adjustedCullRect))
return;
LayoutView* layoutView = getScrollableArea().box().view();
PaintLayer* paintingRoot =
getScrollableArea().layer()->enclosingLayerWithCompositedLayerMapping(
IncludeSelf);
if (!paintingRoot)
paintingRoot = layoutView->layer();
paintingRoot->setContainsDirtyOverlayScrollbars(true);
return;
}
// This check is required to avoid painting custom CSS scrollbars twice.
if (paintingOverlayControls && !getScrollableArea().hasOverlayScrollbars())
return;
{
Optional<ScopedPaintChunkProperties> scopedTransformProperty;
if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
const auto* objectProperties =
getScrollableArea().box().paintProperties();
if (objectProperties && objectProperties->scrollbarPaintOffset()) {
PaintChunkProperties properties(
context.getPaintController().currentPaintChunkProperties());
properties.transform = objectProperties->scrollbarPaintOffset();
scopedTransformProperty.emplace(
context.getPaintController(), getScrollableArea().box(),
DisplayItem::kScrollOverflowControls, properties);
}
}
if (getScrollableArea().horizontalScrollbar() &&
!getScrollableArea().layerForHorizontalScrollbar()) {
TransformRecorder translateRecorder(
context, *getScrollableArea().horizontalScrollbar(),
AffineTransform::translation(adjustedPaintOffset.x(),
adjustedPaintOffset.y()));
getScrollableArea().horizontalScrollbar()->paint(context,
adjustedCullRect);
}
if (getScrollableArea().verticalScrollbar() &&
!getScrollableArea().layerForVerticalScrollbar()) {
TransformRecorder translateRecorder(
context, *getScrollableArea().verticalScrollbar(),
AffineTransform::translation(adjustedPaintOffset.x(),
adjustedPaintOffset.y()));
getScrollableArea().verticalScrollbar()->paint(context, adjustedCullRect);
}
}
if (getScrollableArea().layerForScrollCorner())
return;
// We fill our scroll corner with white if we have a scrollbar that doesn't
// run all the way up to the edge of the box.
paintScrollCorner(context, adjustedPaintOffset, cullRect);
// Paint our resizer last, since it sits on top of the scroll corner.
paintResizer(context, adjustedPaintOffset, cullRect);
}
void ScrollableAreaPainter::paintOverflowControls(GraphicsContext* context, const IntPoint& paintOffset, const IntRect& damageRect, bool paintingOverlayControls)
{
// Don't do anything if we have no overflow.
if (!scrollableArea().box().hasOverflowClip())
return;
IntPoint adjustedPaintOffset = paintOffset;
if (paintingOverlayControls)
adjustedPaintOffset = scrollableArea().cachedOverlayScrollbarOffset();
IntRect localDamageRect = damageRect;
localDamageRect.moveBy(-adjustedPaintOffset);
// Overlay scrollbars paint in a second pass through the layer tree so that they will paint
// on top of everything else. If this is the normal painting pass, paintingOverlayControls
// will be false, and we should just tell the root layer that there are overlay scrollbars
// that need to be painted. That will cause the second pass through the layer tree to run,
// and we'll paint the scrollbars then. In the meantime, cache tx and ty so that the
// second pass doesn't need to re-enter the LayoutTree to get it right.
if (scrollableArea().hasOverlayScrollbars() && !paintingOverlayControls) {
scrollableArea().setCachedOverlayScrollbarOffset(paintOffset);
// It's not necessary to do the second pass if the scrollbars paint into layers.
if ((scrollableArea().horizontalScrollbar() && scrollableArea().layerForHorizontalScrollbar()) || (scrollableArea().verticalScrollbar() && scrollableArea().layerForVerticalScrollbar()))
return;
if (!overflowControlsIntersectRect(localDamageRect))
return;
LayoutView* layoutView = scrollableArea().box().view();
PaintLayer* paintingRoot = scrollableArea().layer()->enclosingLayerWithCompositedLayerMapping(IncludeSelf);
if (!paintingRoot)
paintingRoot = layoutView->layer();
paintingRoot->setContainsDirtyOverlayScrollbars(true);
return;
}
// This check is required to avoid painting custom CSS scrollbars twice.
if (paintingOverlayControls && !scrollableArea().hasOverlayScrollbars())
return;
{
if (scrollableArea().horizontalScrollbar() && !scrollableArea().layerForHorizontalScrollbar()) {
TransformRecorder translateRecorder(*context, *scrollableArea().horizontalScrollbar(), AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()));
scrollableArea().horizontalScrollbar()->paint(context, localDamageRect);
}
if (scrollableArea().verticalScrollbar() && !scrollableArea().layerForVerticalScrollbar()) {
TransformRecorder translateRecorder(*context, *scrollableArea().verticalScrollbar(), AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()));
scrollableArea().verticalScrollbar()->paint(context, localDamageRect);
}
}
if (scrollableArea().layerForScrollCorner())
return;
// We fill our scroll corner with white if we have a scrollbar that doesn't run all the way up to the
// edge of the box.
paintScrollCorner(context, adjustedPaintOffset, damageRect);
// Paint our resizer last, since it sits on top of the scroll corner.
paintResizer(context, adjustedPaintOffset, damageRect);
}