Call ContainerNode::checkForSiblingStyleChanges() for Element insertion / removal only

Source/core/dom/ContainerNode.h

 /*
  * 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, 2009, 2010, 2011, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 127 matching lines @@
 
     bool childrenAffectedByForwardPositionalRules() const { return hasRestyleFlag(ChildrenAffectedByForwardPositionalRules); }
     void setChildrenAffectedByForwardPositionalRules() { setRestyleFlag(ChildrenAffectedByForwardPositionalRules); }
 
     bool childrenAffectedByBackwardPositionalRules() const { return hasRestyleFlag(ChildrenAffectedByBackwardPositionalRules); }
     void setChildrenAffectedByBackwardPositionalRules() { setRestyleFlag(ChildrenAffectedByBackwardPositionalRules); }
 
     // FIXME: These methods should all be renamed to something better than "check",
     // since it's not clear that they alter the style bits of siblings and children.
     void checkForChildrenAdjacentRuleChanges();
-    enum SiblingCheckType { FinishedParsingChildren, SiblingRemoved, Other };
+    enum SiblingCheckType { FinishedParsingChildren, SiblingElementInserted, SiblingElementRemoved };
     void checkForSiblingStyleChanges(SiblingCheckType, Node* nodeBeforeChange, Node* nodeAfterChange);
 
     bool childrenSupportStyleSharing() const { return !hasRestyleFlags(); }
 
     // -----------------------------------------------------------------------------
     // Notification of document structure changes (see core/dom/Node.h for more notification methods)
 
-    enum ChildrenChangeType { ChildInserted, ChildRemoved, AllChildrenRemoved, TextChanged };
+    enum ChildrenChangeType { ElementInserted, NonElementInserted, ElementRemoved, NonElementRemoved, AllChildrenRemoved, TextChanged };
     enum ChildrenChangeSource { ChildrenChangeSourceAPI, ChildrenChangeSourceParser };
     struct ChildrenChange {
         STACK_ALLOCATED();
     public:
+        static ChildrenChange forInsertion(Node& node, ChildrenChangeSource byParser)
+        {
+            ChildrenChange change = {
+                node.isElementNode() ? ElementInserted : NonElementInserted,
+                node.previousSibling(),
+                node.nextSibling(),
+                byParser
+            };
+            return change;
+        }
+
+        static ChildrenChange forRemoval(Node& node, Node* previousSibling, Node* nextSibling, ChildrenChangeSource byParser)
+        {
+            ChildrenChange change = {
+                node.isElementNode() ? ElementRemoved : NonElementRemoved,
+                previousSibling,
+                nextSibling,
+                byParser
+            };
+            return change;
+        }
+
+        bool isChildInsertion() const { return type == ElementInserted || type == NonElementInserted; }
+        bool isChildRemoval() const { return type == ElementRemoved || type == NonElementRemoved; }
+        bool isChildElementChange() const { return type == ElementInserted || type == ElementRemoved; }
+
         ChildrenChangeType type;
         RawPtrWillBeMember<Node> siblingBeforeChange;
         RawPtrWillBeMember<Node> siblingAfterChange;
         ChildrenChangeSource byParser;
     };
 
     // Notifies the node that it's list of children have changed (either by adding or removing child nodes), or a child
     // node that is of the type CDATA_SECTION_NODE, TEXT_NODE or COMMENT_NODE has changed its value.
     virtual void childrenChanged(const ChildrenChange&);
 
@@ skipping 143 matching lines @@
 inline void getChildNodes(ContainerNode& node, NodeVector& nodes)
 {
     ASSERT(!nodes.size());
     for (Node* child = node.firstChild(); child; child = child->nextSibling())
         nodes.append(child);
 }
 
 } // namespace blink
 
 #endif // ContainerNode_h