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

Source/core/dom/ContainerNode.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, 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 551 matching lines @@
         return nullptr;
     }
 
     {
         HTMLFrameOwnerElement::UpdateSuspendScope suspendWidgetHierarchyUpdates;
 
         Node* prev = child->previousSibling();
         Node* next = child->nextSibling();
         removeBetween(prev, next, *child);
         notifyNodeRemoved(*child);
-        ChildrenChange change = {ChildRemoved, prev, next, ChildrenChangeSourceAPI};
-        childrenChanged(change);
+        childrenChanged(ChildrenChange::forRemoval(*child, prev, next, ChildrenChangeSourceAPI));
     }
     dispatchSubtreeModifiedEvent();
     return child;
 }
 
 void ContainerNode::removeBetween(Node* previousChild, Node* nextChild, Node& oldChild)
 {
     NoEventDispatchAssertion assertNoEventDispatch;
 
     ASSERT(oldChild.parentNode() == this);
@@ skipping 25 matching lines @@
     Node* prev = oldChild.previousSibling();
     Node* next = oldChild.nextSibling();
 
     oldChild.updateAncestorConnectedSubframeCountForRemoval();
 
     ChildListMutationScope(*this).willRemoveChild(oldChild);
     oldChild.notifyMutationObserversNodeWillDetach();
 
     removeBetween(prev, next, oldChild);
 
-    ChildrenChange change = {ChildRemoved, prev, next, ChildrenChangeSourceParser};
     notifyNodeRemoved(oldChild);
-    childrenChanged(change);
+    childrenChanged(ChildrenChange::forRemoval(oldChild, prev, next, ChildrenChangeSourceParser));
 }
 
 // this differs from other remove functions because it forcibly removes all the children,
 // regardless of read-only status or event exceptions, e.g.
 void ContainerNode::removeChildren()
 {
     if (!m_firstChild)
         return;
 
     // The container node can be removed from event handlers.
@@ skipping 146 matching lines @@
     ASSERT(!root.isShadowRoot());
 
     InspectorInstrumentation::didInsertDOMNode(&root);
 
     RefPtrWillBeRawPtr<Node> protect(this);
     RefPtrWillBeRawPtr<Node> protectNode(root);
 
     NodeVector postInsertionNotificationTargets;
     notifyNodeInsertedInternal(root, postInsertionNotificationTargets);
 
-    ChildrenChange change = {ChildInserted, root.previousSibling(), root.nextSibling(), source};
-    childrenChanged(change);
+    childrenChanged(ChildrenChange::forInsertion(root, source));
 
     for (size_t i = 0; i < postInsertionNotificationTargets.size(); ++i) {
         Node* targetNode = postInsertionNotificationTargets[i].get();
         if (targetNode->inDocument())
             targetNode->didNotifySubtreeInsertionsToDocument();
     }
 }
 
 void ContainerNode::notifyNodeInsertedInternal(Node& root, NodeVector& postInsertionNotificationTargets)
 {
@@ skipping 45 matching lines @@
     clearChildNeedsStyleRecalc();
     Node::detach(context);
 }
 
 void ContainerNode::childrenChanged(const ChildrenChange& change)
 {
     document().incDOMTreeVersion();
     if (!change.byParser && change.type != TextChanged)
         document().updateRangesAfterChildrenChanged(this);
     invalidateNodeListCachesInAncestors();
-    if (change.type == ChildInserted && !childNeedsStyleRecalc()) {
+    if (change.isChildInsertion() && !childNeedsStyleRecalc()) {
         setChildNeedsStyleRecalc();
         markAncestorsWithChildNeedsStyleRecalc();
     }
 }
 
 void ContainerNode::cloneChildNodes(ContainerNode *clone)
 {
     TrackExceptionState exceptionState;
     for (Node* n = firstChild(); n && !exceptionState.hadException(); n = n->nextSibling())
         clone->appendChild(n->cloneNode(true), exceptionState);
@@ skipping 401 matching lines @@
         ASSERT(changeType != FinishedParsingChildren);
         // Find our new first child element.
         Element* firstChildElement = ElementTraversal::firstChild(*this);
         RenderStyle* firstChildElementStyle = firstChildElement ? firstChildElement->renderStyle() : 0;
 
         // Find the first element after the change.
         Element* elementAfterChange = nodeAfterChange->isElementNode() ? toElement(nodeAfterChange) : ElementTraversal::nextSibling(*nodeAfterChange);
         RenderStyle* elementAfterChangeStyle = elementAfterChange ? elementAfterChange->renderStyle() : 0;
 
         // This is the element insertion as first child element case.
-        if (firstChildElement != elementAfterChange && elementAfterChangeStyle && elementAfterChangeStyle->firstChildState())
+        if (firstChildElement != elementAfterChange && elementAfterChangeStyle && elementAfterChangeStyle->firstChildState()) {
+            ASSERT(changeType == SiblingElementInserted);
             elementAfterChange->setNeedsStyleRecalc(SubtreeStyleChange);
+        }
 
         // This is the first child element removal case.
-        if (changeType == SiblingRemoved && firstChildElement == elementAfterChange && firstChildElement && (!firstChildElementStyle || !firstChildElementStyle->firstChildState()))
+        if (changeType == SiblingElementRemoved && firstChildElement == elementAfterChange && firstChildElement && (!firstChildElementStyle || !firstChildElementStyle->firstChildState()))
             firstChildElement->setNeedsStyleRecalc(SubtreeStyleChange);
     }
 
     // :last-child. In the parser callback case, we don't have to check anything, since we were right the first time.
     // In the DOM case, we only need to do something if |afterChange| is not 0.
     if (childrenAffectedByLastChildRules() && nodeBeforeChange) {
         // Find our new last child element.
         Element* lastChildElement = ElementTraversal::lastChild(*this);
         RenderStyle* lastChildElementStyle = lastChildElement ? lastChildElement->renderStyle() : 0;
 
         // Find the last element before the change.
         Element* elementBeforeChange = nodeBeforeChange->isElementNode() ? toElement(nodeBeforeChange) : ElementTraversal::previousSibling(*nodeBeforeChange);
         RenderStyle* elementBeforeChangeStyle = elementBeforeChange ? elementBeforeChange->renderStyle() : 0;
 
         // This is the element insertion as last child element case.
-        if (lastChildElement != elementBeforeChange && elementBeforeChangeStyle && elementBeforeChangeStyle->lastChildState())
+        if (lastChildElement != elementBeforeChange && elementBeforeChangeStyle && elementBeforeChangeStyle->lastChildState()) {
+            ASSERT(SiblingElementInserted);
             elementBeforeChange->setNeedsStyleRecalc(SubtreeStyleChange);
+        }
 
         // This is the last child element removal case. The parser callback case is similar to node removal as well in that we need to change the last child
         // to match now.
-        if ((changeType == SiblingRemoved || changeType == FinishedParsingChildren) && lastChildElement == elementBeforeChange && lastChildElement && (!lastChildElementStyle || !lastChildElementStyle->lastChildState()))
+        if ((changeType == SiblingElementRemoved || changeType == FinishedParsingChildren) && lastChildElement == elementBeforeChange && lastChildElement && (!lastChildElementStyle || !lastChildElementStyle->lastChildState()))
             lastChildElement->setNeedsStyleRecalc(SubtreeStyleChange);
     }
 
     // The + selector. We need to invalidate the first element following the change. It is the only possible element
     // that could be affected by this DOM change.
     if (childrenAffectedByDirectAdjacentRules() && nodeAfterChange) {
         if (Element* elementAfterChange = nodeAfterChange->isElementNode() ? toElement(nodeAfterChange) : ElementTraversal::nextSibling(*nodeAfterChange))
             elementAfterChange->setNeedsStyleRecalc(SubtreeStyleChange);
     }
 }
@@ skipping 99 matching lines @@
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace blink