Implement :defined pseudo-class selector for Custom Elements

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 2323 matching lines @@
         DCHECK_EQ(CustomElementState::Uncustomized, oldState);
         break;
 
     case CustomElementState::Custom:
         DCHECK_EQ(CustomElementState::Undefined, oldState);
         break;
     }
 
     DCHECK(isHTMLElement());
     DCHECK_NE(V0Upgraded, getV0CustomElementState());
+#if DCHECK_IS_ON()
+    bool wasDefined = toElement(this)->isDefined();
+#endif
 
     setFlag(CustomElementFlag);
     if (newState == CustomElementState::Custom)
         setFlag(CustomElementCustomFlag);
     DCHECK(newState == getCustomElementState());
 
-    // TODO(kojii): Should fire pseudoStateChanged() when :defined selector is
-    // ready.
-    // toElement(this)->pseudoStateChanged(CSSSelector::PseudoDefined);
+    // When the state goes from Uncustomized to Undefined, and then to Custom,
+    // isDefined is always flipped.
+#if DCHECK_IS_ON()
+    DCHECK_NE(wasDefined, toElement(this)->isDefined());
+#endif
+    toElement(this)->pseudoStateChanged(CSSSelector::PseudoDefined);
 }
 
 void Node::setV0CustomElementState(V0CustomElementState newState)
 {
     V0CustomElementState oldState = getV0CustomElementState();
 
     switch (newState) {
     case V0NotCustomElement:
         ASSERT_NOT_REACHED(); // Everything starts in this state
         return;
@@ skipping 111 matching lines @@
 
 void showNodePath(const blink::Node* node)
 {
     if (node)
         node->showNodePathForThis();
     else
         fprintf(stderr, "Cannot showNodePath for (nil)\n");
 }
 
 #endif