Specialize InsertionPoint attach/detach.

sky/engine/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 783 matching lines @@
     if (wasInDocument) {
         if (isUpgradedCustomElement())
             CustomElement::didDetach(this, insertionPoint->document());
     }
 }
 
 void Element::attach(const AttachContext& context)
 {
     ASSERT(document().inStyleRecalc());
 
+    if (isInsertionPoint())
+        toInsertionPoint(this)->attachDistribution(context);
+
     // We've already been through detach when doing an attach, but we might
     // need to clear any state that's been added since then.
     if (hasRareData() && styleChangeType() == NeedsReattachStyleChange) {
         ElementRareData* data = elementRareData();
         data->clearComputedStyle();
     }
 
     RenderTreeBuilder(this, context.resolvedStyle).createRendererForElementIfNeeded();
 
     if (hasRareData() && !renderer()) {
         if (ActiveAnimations* activeAnimations = elementRareData()->activeAnimations()) {
             activeAnimations->cssAnimations().cancel();
             activeAnimations->setAnimationStyleChange(false);
         }
     }
 
     // When a shadow root exists, it does the work of attaching the children.
     if (ElementShadow* shadow = this->shadow())
         shadow->attach(context);
 
     ContainerNode::attach(context);
 }
 
 void Element::detach(const AttachContext& context)
 {
+    if (isInsertionPoint())
+        toInsertionPoint(this)->detachDistribution(context);
+
     if (hasRareData()) {
         ElementRareData* data = elementRareData();
 
         // attach() will perform the below steps for us when inside recalcStyle.
         if (!document().inStyleRecalc()) {
             data->clearComputedStyle();
         }
 
         if (ActiveAnimations* activeAnimations = data->activeAnimations()) {
             if (context.performingReattach) {
@@ skipping 953 matching lines @@
         return false;
     // Turn off style sharing for elements that can gain layers for reasons outside of the style system.
     // See comments in RenderObject::setStyle().
     // FIXME: Why does gaining a layer from outside the style system require disabling sharing?
     if (isHTMLCanvasElement(*this))
         return false;
     return true;
 }
 
 } // namespace blink