Implement Node.isConnected

third_party/WebKit/Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 765 matching lines @@
 
 unsigned Node::nodeIndex() const
 {
     const Node* tempNode = previousSibling();
     unsigned count = 0;
     for (count = 0; tempNode; count++)
         tempNode = tempNode->previousSibling();
     return count;
 }
 
+bool Node::isConnected() const

[hayato, 2016/04/04 05:32:52]

I think we can use Node::inDocument() for Node.isConnected.

However, could you rename Node::inDocument() to Node::nShadowIncludingDocument()
in another CL?

See https://dom.spec.whatwg.org/#in-a-shadow-including-document

Unfortunately, the current Node::inDocument does mean "in a shadow including
document", I think.
It does not mean "In a document" in the spec.
https://dom.spec.whatwg.org/#in-a-document

That's confusing.

[yuzuchan, 2016/04/04 07:09:30]

Acknowledged.
I will start another CL to rename inDocument soon. :) 

+{
+    return isInShadowTree() ? shadowHost()->treeRoot().isSameNode(ownerDocument()) : treeRoot().isSameNode(ownerDocument());
+}
+
 NodeListsNodeData* Node::nodeLists()
 {
     return hasRareData() ? rareData()->nodeLists() : nullptr;
 }
 
 void Node::clearNodeLists()
 {
     rareData()->clearNodeLists();
 }
 
@@ skipping 1653 matching lines @@
 
 void showNodePath(const blink::Node* node)
 {
     if (node)
         node->showNodePathForThis();
     else
         fprintf(stderr, "Cannot showNodePath for (nil)\n");
 }
 
 #endif