void PaintLayerCompositor::ensureRootLayer()
{
RootLayerAttachment expectedAttachment = m_layoutView.frame()->isLocalRoot() ? RootLayerAttachedViaChromeClient : RootLayerAttachedViaEnclosingFrame;
if (expectedAttachment == m_rootLayerAttachment)
return;
Settings* settings = m_layoutView.document().settings();
if (!m_rootContentLayer) {
m_rootContentLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
IntRect overflowRect = m_layoutView.pixelSnappedLayoutOverflowRect();
m_rootContentLayer->setSize(FloatSize(overflowRect.maxX(), overflowRect.maxY()));
m_rootContentLayer->setPosition(FloatPoint());
m_rootContentLayer->setOwnerNodeId(DOMNodeIds::idForNode(m_layoutView.generatingNode()));
// FIXME: with rootLayerScrolls, we probably don't even need m_rootContentLayer?
if (!(settings && settings->rootLayerScrolls())) {
// Need to clip to prevent transformed content showing outside this frame
m_rootContentLayer->setMasksToBounds(true);
}
}
if (!m_overflowControlsHostLayer) {
ASSERT(!m_scrollLayer);
ASSERT(!m_containerLayer);
// Create a layer to host the clipping layer and the overflow controls layers.
m_overflowControlsHostLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
// Clip iframe's overflow controls layer.
bool containerMasksToBounds = !m_layoutView.frame()->isLocalRoot();
m_overflowControlsHostLayer->setMasksToBounds(containerMasksToBounds);
// Create a clipping layer if this is an iframe or settings require to clip.
m_containerLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
m_containerLayer->setMasksToBounds(containerMasksToBounds);
m_scrollLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
scrollingCoordinator->setLayerIsContainerForFixedPositionLayers(m_scrollLayer.get(), true);
// Hook them up
m_overflowControlsHostLayer->addChild(m_containerLayer.get());
m_containerLayer->addChild(m_scrollLayer.get());
m_scrollLayer->addChild(m_rootContentLayer.get());
frameViewDidChangeSize();
}
// Check to see if we have to change the attachment
if (m_rootLayerAttachment != RootLayerUnattached) {
detachRootLayer();
detachCompositorTimeline();
}
attachCompositorTimeline();
attachRootLayer(expectedAttachment);
}
void Animation::destroyCompositorPlayer()
{
detachCompositedLayers();
if (m_compositorPlayer) {
detachCompositorTimeline();
m_compositorPlayer->setAnimationDelegate(nullptr);
}
m_compositorPlayer.clear();
}
void PaintLayerCompositor::setIsInWindow(bool isInWindow)
{
if (!staleInCompositingMode())
return;
if (isInWindow) {
if (m_rootLayerAttachment != RootLayerUnattached)
return;
RootLayerAttachment attachment = m_layoutView.frame()->isLocalRoot() ? RootLayerAttachedViaChromeClient : RootLayerAttachedViaEnclosingFrame;
attachCompositorTimeline();
attachRootLayer(attachment);
} else {
if (m_rootLayerAttachment == RootLayerUnattached)
return;
detachRootLayer();
detachCompositorTimeline();
}
}
