void GraphicsLayerTreeBuilder::rebuild(PaintLayer& layer, AncestorInfo info)
{
// Make the layer compositing if necessary, and set up clipping and content layers.
// Note that we can only do work here that is independent of whether the descendant layers
// have been processed. computeCompositingRequirements() will already have done the paint invalidation if necessary.
layer.stackingNode()->updateLayerListsIfNeeded();
const bool hasCompositedLayerMapping = layer.hasCompositedLayerMapping();
CompositedLayerMapping* currentCompositedLayerMapping = layer.compositedLayerMapping();
// If this layer has a compositedLayerMapping, then that is where we place subsequent children GraphicsLayers.
// Otherwise children continue to append to the child list of the enclosing layer.
GraphicsLayerVector layerChildren;
AncestorInfo infoForChildren(info);
if (hasCompositedLayerMapping) {
infoForChildren.childLayersOfEnclosingCompositedLayer = &layerChildren;
infoForChildren.enclosingCompositedLayer = &layer;
}
#if ENABLE(ASSERT)
LayerListMutationDetector mutationChecker(layer.stackingNode());
#endif
if (layer.stackingNode()->isStackingContext()) {
PaintLayerStackingNodeIterator iterator(*layer.stackingNode(), NegativeZOrderChildren);
while (PaintLayerStackingNode* curNode = iterator.next())
rebuild(*curNode->layer(), infoForChildren);
// If a negative z-order child is compositing, we get a foreground layer which needs to get parented.
if (hasCompositedLayerMapping && currentCompositedLayerMapping->foregroundLayer())
infoForChildren.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->foregroundLayer());
}
PaintLayerStackingNodeIterator iterator(*layer.stackingNode(), NormalFlowChildren | PositiveZOrderChildren);
while (PaintLayerStackingNode* curNode = iterator.next())
rebuild(*curNode->layer(), infoForChildren);
if (hasCompositedLayerMapping) {
bool parented = false;
if (layer.layoutObject()->isLayoutPart())
parented = PaintLayerCompositor::attachFrameContentLayersToIframeLayer(toLayoutPart(layer.layoutObject()));
if (!parented)
currentCompositedLayerMapping->setSublayers(layerChildren);
if (shouldAppendLayer(layer))
info.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->childForSuperlayers());
}
if (layer.scrollParent()
&& layer.scrollParent()->hasCompositedLayerMapping()
&& layer.scrollParent()->compositedLayerMapping()->needsToReparentOverflowControls()
&& layer.scrollParent()->getScrollableArea()->topmostScrollChild() == &layer)
info.childLayersOfEnclosingCompositedLayer->append(layer.scrollParent()->compositedLayerMapping()->detachLayerForOverflowControls(*info.enclosingCompositedLayer));
}
void InspectorLayerTreeAgent::buildLayerIdToNodeIdMap(PaintLayer* root, LayerIdToNodeIdMap& layerIdToNodeIdMap)
{
if (root->hasCompositedLayerMapping()) {
if (Node* node = root->layoutObject()->generatingNode()) {
GraphicsLayer* graphicsLayer = root->compositedLayerMapping()->childForSuperlayers();
layerIdToNodeIdMap.set(graphicsLayer->platformLayer()->id(), idForNode(node));
}
}
for (PaintLayer* child = root->firstChild(); child; child = child->nextSibling())
buildLayerIdToNodeIdMap(child, layerIdToNodeIdMap);
if (!root->layoutObject()->isLayoutIFrame())
return;
FrameView* childFrameView = toFrameView(toLayoutPart(root->layoutObject())->widget());
if (LayoutView* childLayoutView = childFrameView->layoutView()) {
if (PaintLayerCompositor* childCompositor = childLayoutView->compositor())
buildLayerIdToNodeIdMap(childCompositor->rootLayer(), layerIdToNodeIdMap);
}
}
TEST_F(ScrollingCoordinatorTest, iframeScrolling)
{
registerMockedHttpURLLoad("iframe-scrolling.html");
registerMockedHttpURLLoad("iframe-scrolling-inner.html");
navigateTo(m_baseURL + "iframe-scrolling.html");
forceFullCompositingUpdate();
// Verify the properties of the accelerated scrolling element starting from the LayoutObject
// all the way to the WebLayer.
Element* scrollableFrame = frame()->document()->getElementById("scrollable");
ASSERT_TRUE(scrollableFrame);
LayoutObject* layoutObject = scrollableFrame->layoutObject();
ASSERT_TRUE(layoutObject);
ASSERT_TRUE(layoutObject->isLayoutPart());
LayoutPart* layoutPart = toLayoutPart(layoutObject);
ASSERT_TRUE(layoutPart);
ASSERT_TRUE(layoutPart->widget());
ASSERT_TRUE(layoutPart->widget()->isFrameView());
FrameView* innerFrameView = toFrameView(layoutPart->widget());
LayoutView* innerLayoutView = innerFrameView->layoutView();
ASSERT_TRUE(innerLayoutView);
PaintLayerCompositor* innerCompositor = innerLayoutView->compositor();
ASSERT_TRUE(innerCompositor->inCompositingMode());
ASSERT_TRUE(innerCompositor->scrollLayer());
GraphicsLayer* scrollLayer = innerCompositor->scrollLayer();
ASSERT_EQ(innerFrameView, scrollLayer->scrollableArea());
WebLayer* webScrollLayer = scrollLayer->platformLayer();
ASSERT_TRUE(webScrollLayer->scrollable());
#if OS(ANDROID)
// Now verify we've attached impl-side scrollbars onto the scrollbar layers
ASSERT_TRUE(innerCompositor->layerForHorizontalScrollbar());
ASSERT_TRUE(innerCompositor->layerForHorizontalScrollbar()->hasContentsLayer());
ASSERT_TRUE(innerCompositor->layerForVerticalScrollbar());
ASSERT_TRUE(innerCompositor->layerForVerticalScrollbar()->hasContentsLayer());
#endif
}
TEST_F(ScrollingCoordinatorTest, rtlIframe)
{
registerMockedHttpURLLoad("rtl-iframe.html");
registerMockedHttpURLLoad("rtl-iframe-inner.html");
navigateTo(m_baseURL + "rtl-iframe.html");
forceFullCompositingUpdate();
// Verify the properties of the accelerated scrolling element starting from the LayoutObject
// all the way to the WebLayer.
Element* scrollableFrame = frame()->document()->getElementById("scrollable");
ASSERT_TRUE(scrollableFrame);
LayoutObject* layoutObject = scrollableFrame->layoutObject();
ASSERT_TRUE(layoutObject);
ASSERT_TRUE(layoutObject->isLayoutPart());
LayoutPart* layoutPart = toLayoutPart(layoutObject);
ASSERT_TRUE(layoutPart);
ASSERT_TRUE(layoutPart->widget());
ASSERT_TRUE(layoutPart->widget()->isFrameView());
FrameView* innerFrameView = toFrameView(layoutPart->widget());
LayoutView* innerLayoutView = innerFrameView->layoutView();
ASSERT_TRUE(innerLayoutView);
PaintLayerCompositor* innerCompositor = innerLayoutView->compositor();
ASSERT_TRUE(innerCompositor->inCompositingMode());
ASSERT_TRUE(innerCompositor->scrollLayer());
GraphicsLayer* scrollLayer = innerCompositor->scrollLayer();
ASSERT_EQ(innerFrameView, scrollLayer->scrollableArea());
WebLayer* webScrollLayer = scrollLayer->platformLayer();
ASSERT_TRUE(webScrollLayer->scrollable());
int expectedScrollPosition = 958 + (innerFrameView->verticalScrollbar()->isOverlayScrollbar() ? 0 : 15);
ASSERT_EQ(expectedScrollPosition, webScrollLayer->scrollPositionDouble().x);
}
void ChromeClientImpl::showMouseOverURL(const HitTestResult& result) {
if (!m_webView->client())
return;
WebURL url;
// Find out if the mouse is over a link, and if so, let our UI know...
if (result.isLiveLink() && !result.absoluteLinkURL().getString().isEmpty()) {
url = result.absoluteLinkURL();
} else if (result.innerNode() && (isHTMLObjectElement(*result.innerNode()) ||
isHTMLEmbedElement(*result.innerNode()))) {
LayoutObject* object = result.innerNode()->layoutObject();
if (object && object->isLayoutPart()) {
Widget* widget = toLayoutPart(object)->widget();
if (widget && widget->isPluginContainer()) {
WebPluginContainerImpl* plugin = toWebPluginContainerImpl(widget);
url = plugin->plugin()->linkAtPosition(
result.roundedPointInInnerNodeFrame());
}
}
}
m_webView->client()->setMouseOverURL(url);
}
bool PaintLayerCompositor::allocateOrClearCompositedLayerMapping(PaintLayer* layer, const CompositingStateTransitionType compositedLayerUpdate)
{
bool compositedLayerMappingChanged = false;
// FIXME: It would be nice to directly use the layer's compositing reason,
// but allocateOrClearCompositedLayerMapping also gets called without having updated compositing
// requirements fully.
switch (compositedLayerUpdate) {
case AllocateOwnCompositedLayerMapping:
ASSERT(!layer->hasCompositedLayerMapping());
setCompositingModeEnabled(true);
// If we need to issue paint invalidations, do so before allocating the compositedLayerMapping and clearing out the groupedMapping.
paintInvalidationOnCompositingChange(layer);
// If this layer was previously squashed, we need to remove its reference to a groupedMapping right away, so
// that computing paint invalidation rects will know the layer's correct compositingState.
// FIXME: do we need to also remove the layer from it's location in the squashing list of its groupedMapping?
// Need to create a test where a squashed layer pops into compositing. And also to cover all other
// sorts of compositingState transitions.
layer->setLostGroupedMapping(false);
layer->setGroupedMapping(nullptr, PaintLayer::InvalidateLayerAndRemoveFromMapping);
layer->ensureCompositedLayerMapping();
compositedLayerMappingChanged = true;
// At this time, the ScrollingCooridnator only supports the top-level frame.
if (layer->isRootLayer() && m_layoutView.frame()->isLocalRoot()) {
if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
scrollingCoordinator->frameViewRootLayerDidChange(m_layoutView.frameView());
}
break;
case RemoveOwnCompositedLayerMapping:
// PutInSquashingLayer means you might have to remove the composited layer mapping first.
case PutInSquashingLayer:
if (layer->hasCompositedLayerMapping()) {
// If we're removing the compositedLayerMapping from a reflection, clear the source GraphicsLayer's pointer to
// its replica GraphicsLayer. In practice this should never happen because reflectee and reflection
// are both either composited, or not composited.
if (layer->isReflection()) {
PaintLayer* sourceLayer = toLayoutBoxModelObject(layer->layoutObject()->parent())->layer();
if (sourceLayer->hasCompositedLayerMapping()) {
ASSERT(sourceLayer->compositedLayerMapping()->mainGraphicsLayer()->replicaLayer() == layer->compositedLayerMapping()->mainGraphicsLayer());
sourceLayer->compositedLayerMapping()->mainGraphicsLayer()->setReplicatedByLayer(nullptr);
}
}
layer->clearCompositedLayerMapping();
compositedLayerMappingChanged = true;
}
break;
case RemoveFromSquashingLayer:
case NoCompositingStateChange:
// Do nothing.
break;
}
if (compositedLayerMappingChanged && layer->layoutObject()->isLayoutPart()) {
PaintLayerCompositor* innerCompositor = frameContentsCompositor(toLayoutPart(layer->layoutObject()));
if (innerCompositor && innerCompositor->staleInCompositingMode())
innerCompositor->updateRootLayerAttachment();
}
if (compositedLayerMappingChanged)
layer->clipper().clearClipRectsIncludingDescendants(PaintingClipRects);
// If a fixed position layer gained/lost a compositedLayerMapping or the reason not compositing it changed,
// the scrolling coordinator needs to recalculate whether it can do fast scrolling.
if (compositedLayerMappingChanged) {
if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
scrollingCoordinator->frameViewFixedObjectsDidChange(m_layoutView.frameView());
}
return compositedLayerMappingChanged;
}