void RenderLayerModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
bool hadTransform = hasTransformRelatedProperty();
bool hadLayer = hasLayer();
bool layerWasSelfPainting = hadLayer && layer()->isSelfPaintingLayer();
RenderObject::styleDidChange(diff, oldStyle);
updateFromStyle();
LayerType type = layerTypeRequired();
if (type != NoLayer) {
if (!layer() && layerCreationAllowedForSubtree()) {
if (s_wasFloating && isFloating())
setChildNeedsLayout();
createLayer(type);
if (parent() && !needsLayout()) {
// FIXME: We should call a specialized version of this function.
layer()->updateLayerPositionsAfterLayout();
}
}
} else if (layer() && layer()->parent()) {
setHasTransformRelatedProperty(false); // Either a transform wasn't specified or the object doesn't support transforms, so just null out the bit.
setHasReflection(false);
layer()->removeOnlyThisLayer(); // calls destroyLayer() which clears m_layer
if (s_wasFloating && isFloating())
setChildNeedsLayout();
if (hadTransform)
setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
}
if (layer()) {
// FIXME: Ideally we shouldn't need this setter but we can't easily infer an overflow-only layer
// from the style.
layer()->setLayerType(type);
layer()->styleChanged(diff, oldStyle);
if (hadLayer && layer()->isSelfPaintingLayer() != layerWasSelfPainting)
setChildNeedsLayout();
}
if (FrameView *frameView = view()->frameView()) {
bool newStyleIsViewportConstained = style()->hasViewportConstrainedPosition();
bool oldStyleIsViewportConstrained = oldStyle && oldStyle->hasViewportConstrainedPosition();
if (newStyleIsViewportConstained != oldStyleIsViewportConstrained) {
if (newStyleIsViewportConstained && layer())
frameView->addViewportConstrainedObject(this);
else
frameView->removeViewportConstrainedObject(this);
}
}
}
void RenderLayerModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderElement::styleDidChange(diff, oldStyle);
updateFromStyle();
if (requiresLayer()) {
if (!layer() && layerCreationAllowedForSubtree()) {
if (s_wasFloating && isFloating())
setChildNeedsLayout();
createLayer();
if (parent() && !needsLayout() && containingBlock()) {
layer()->setRepaintStatus(NeedsFullRepaint);
// There is only one layer to update, it is not worth using |cachedOffset| since
// we are not sure the value will be used.
layer()->updateLayerPositions(0);
}
}
} else if (layer() && layer()->parent()) {
#if ENABLE(CSS_COMPOSITING)
if (oldStyle->hasBlendMode())
layer()->parent()->dirtyAncestorChainHasBlendingDescendants();
#endif
setHasTransformRelatedProperty(false); // All transform-related propeties force layers, so we know we don't have one or the object doesn't support them.
setHasReflection(false);
// Repaint the about to be destroyed self-painting layer when style change also triggers repaint.
if (layer()->isSelfPaintingLayer() && layer()->repaintStatus() == NeedsFullRepaint)
repaintUsingContainer(containerForRepaint(), layer()->repaintRect());
layer()->removeOnlyThisLayer(); // calls destroyLayer() which clears m_layer
if (s_wasFloating && isFloating())
setChildNeedsLayout();
if (s_hadTransform)
setNeedsLayoutAndPrefWidthsRecalc();
}
if (layer()) {
layer()->styleChanged(diff, oldStyle);
if (s_hadLayer && layer()->isSelfPaintingLayer() != s_layerWasSelfPainting)
setChildNeedsLayout();
}
bool newStyleIsViewportConstrained = style().hasViewportConstrainedPosition();
bool oldStyleIsViewportConstrained = oldStyle && oldStyle->hasViewportConstrainedPosition();
if (newStyleIsViewportConstrained != oldStyleIsViewportConstrained) {
if (newStyleIsViewportConstrained && layer())
view().frameView().addViewportConstrainedObject(this);
else
view().frameView().removeViewportConstrainedObject(this);
}
#if ENABLE(CSS_SCROLL_SNAP)
const RenderStyle& newStyle = style();
if (oldStyle && scrollSnapContainerRequiresUpdateForStyleUpdate(*oldStyle, newStyle)) {
if (RenderLayer* renderLayer = layer()) {
renderLayer->updateSnapOffsets();
renderLayer->updateScrollSnapState();
} else if (isBody() || isDocumentElementRenderer()) {
FrameView& frameView = view().frameView();
frameView.updateSnapOffsets();
frameView.updateScrollSnapState();
frameView.updateScrollingCoordinatorScrollSnapProperties();
}
}
if (oldStyle && oldStyle->scrollSnapCoordinates() != newStyle.scrollSnapCoordinates()) {
const RenderBox* scrollSnapBox = enclosingBox().findEnclosingScrollableContainer();
if (scrollSnapBox && scrollSnapBox->layer()) {
const RenderStyle& style = scrollSnapBox->style();
if (style.scrollSnapType() != ScrollSnapType::None) {
scrollSnapBox->layer()->updateSnapOffsets();
scrollSnapBox->layer()->updateScrollSnapState();
if (scrollSnapBox->isBody() || scrollSnapBox->isDocumentElementRenderer())
scrollSnapBox->view().frameView().updateScrollingCoordinatorScrollSnapProperties();
}
}
}
#endif
}
