Use tighter typing in editing: ReplaceSelectionCommand

Source/core/editing/ReplaceSelectionCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 35 matching lines @@
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
 #include "core/editing/markup.h"
 #include "core/events/BeforeTextInsertedEvent.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLLIElement.h"
+#include "core/html/HTMLQuoteElement.h"
+#include "core/html/HTMLSelectElement.h"
 #include "core/html/HTMLSpanElement.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderText.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 enum EFragmentType { EmptyFragment, SingleTextNodeFragment, TreeFragment };
 
 // --- ReplacementFragment helper class
 
 class ReplacementFragment FINAL {
     WTF_MAKE_NONCOPYABLE(ReplacementFragment);
     STACK_ALLOCATED();
 public:
     ReplacementFragment(Document*, DocumentFragment*, const VisibleSelection&);
 
     Node* firstChild() const;
     Node* lastChild() const;
 
     bool isEmpty() const;
 
     bool hasInterchangeNewlineAtStart() const { return m_hasInterchangeNewlineAtStart; }
     bool hasInterchangeNewlineAtEnd() const { return m_hasInterchangeNewlineAtEnd; }
 
     void removeNode(PassRefPtrWillBeRawPtr<Node>);
-    void removeNodePreservingChildren(PassRefPtrWillBeRawPtr<Node>);
+    void removeNodePreservingChildren(PassRefPtrWillBeRawPtr<ContainerNode>);
 
 private:
-    PassRefPtrWillBeRawPtr<Element> insertFragmentForTestRendering(Node* rootEditableNode);
-    void removeUnrenderedNodes(Node*);
+    PassRefPtrWillBeRawPtr<HTMLElement> insertFragmentForTestRendering(Element* rootEditableElement);
+    void removeUnrenderedNodes(ContainerNode*);
     void restoreAndRemoveTestRenderingNodesToFragment(Element*);
-    void removeInterchangeNodes(Node*);
+    void removeInterchangeNodes(ContainerNode*);
 
     void insertNodeBefore(PassRefPtrWillBeRawPtr<Node>, Node* refNode);
 
     RefPtrWillBeMember<Document> m_document;
     RefPtrWillBeMember<DocumentFragment> m_fragment;
     bool m_hasInterchangeNewlineAtStart;
     bool m_hasInterchangeNewlineAtEnd;
 };
 
-static bool isInterchangeNewlineNode(const Node *node)
+static bool isInterchangeHTMLBRElement(const Node* node)
 {
     DEFINE_STATIC_LOCAL(String, interchangeNewlineClassString, (AppleInterchangeNewline));
-    if (!isHTMLBRElement(node) || toElement(node)->getAttribute(classAttr) != interchangeNewlineClassString)
+    if (!isHTMLBRElement(node) || toHTMLBRElement(node)->getAttribute(classAttr) != interchangeNewlineClassString)
         return false;
     UseCounter::count(node->document(), UseCounter::EditingAppleInterchangeNewline);
     return true;
 }
 
-static bool isInterchangeConvertedSpaceSpan(const Node *node)
+static bool isHTMLInterchangeConvertedSpaceSpan(const Node* node)
 {
     DEFINE_STATIC_LOCAL(String, convertedSpaceSpanClassString, (AppleConvertedSpace));
     if (!node->isHTMLElement() || toHTMLElement(node)->getAttribute(classAttr) != convertedSpaceSpanClassString)
         return false;
     UseCounter::count(node->document(), UseCounter::EditingAppleConvertedSpace);
     return true;
 }
 
 static Position positionAvoidingPrecedingNodes(Position pos)
 {
     // If we're already on a break, it's probably a placeholder and we shouldn't change our position.
     if (editingIgnoresContent(pos.deprecatedNode()))
         return pos;
 
     // We also stop when changing block flow elements because even though the visual position is the
     // same.  E.g.,
     //   <div>foo^</div>^
     // The two positions above are the same visual position, but we want to stay in the same block.
-    Node* enclosingBlockNode = enclosingBlock(pos.containerNode());
-    for (Position nextPosition = pos; nextPosition.containerNode() != enclosingBlockNode; pos = nextPosition) {
+    Element* enclosingBlockElement = enclosingBlock(pos.containerNode());
+    for (Position nextPosition = pos; nextPosition.containerNode() != enclosingBlockElement; pos = nextPosition) {
         if (lineBreakExistsAtPosition(pos))
             break;
 
         if (pos.containerNode()->nonShadowBoundaryParentNode())
             nextPosition = positionInParentAfterNode(*pos.containerNode());
 
         if (nextPosition == pos
-            || enclosingBlock(nextPosition.containerNode()) != enclosingBlockNode
+            || enclosingBlock(nextPosition.containerNode()) != enclosingBlockElement
             || VisiblePosition(pos) != VisiblePosition(nextPosition))
             break;
     }
     return pos;
 }
 
 ReplacementFragment::ReplacementFragment(Document* document, DocumentFragment* fragment, const VisibleSelection& selection)
     : m_document(document),
       m_fragment(fragment),
       m_hasInterchangeNewlineAtStart(false),
       m_hasInterchangeNewlineAtEnd(false)
 {
     if (!m_document)
         return;
     if (!m_fragment || !m_fragment->hasChildren())
         return;
 
     RefPtrWillBeRawPtr<Element> editableRoot = selection.rootEditableElement();
     ASSERT(editableRoot);
     if (!editableRoot)
         return;
 
-    Node* shadowAncestorNode;
+    Element* shadowAncestorElement;
     if (editableRoot->isInShadowTree())
-        shadowAncestorNode = editableRoot->shadowHost();
+        shadowAncestorElement = editableRoot->shadowHost();
     else
-        shadowAncestorNode = editableRoot.get();
+        shadowAncestorElement = editableRoot.get();
 
-    if (!editableRoot->getAttributeEventListener(EventTypeNames::webkitBeforeTextInserted) &&
+    if (!editableRoot->getAttributeEventListener(EventTypeNames::webkitBeforeTextInserted)
         // FIXME: Remove these checks once textareas and textfields actually register an event handler.
-        !(shadowAncestorNode && shadowAncestorNode->renderer() && shadowAncestorNode->renderer()->isTextControl()) &&
-        editableRoot->rendererIsRichlyEditable()) {
+        && !(shadowAncestorElement && shadowAncestorElement->renderer() && shadowAncestorElement->renderer()->isTextControl())
+        && editableRoot->rendererIsRichlyEditable()) {
         removeInterchangeNodes(m_fragment.get());
         return;
     }
 
-    RefPtrWillBeRawPtr<Element> holder = insertFragmentForTestRendering(editableRoot.get());
+    RefPtrWillBeRawPtr<HTMLElement> holder = insertFragmentForTestRendering(editableRoot.get());
     if (!holder) {
         removeInterchangeNodes(m_fragment.get());
         return;
     }
 
     RefPtrWillBeRawPtr<Range> range = VisibleSelection::selectionFromContentsOfNode(holder.get()).toNormalizedRange();
     String text = plainText(range.get(), static_cast<TextIteratorBehavior>(TextIteratorEmitsOriginalText | TextIteratorIgnoresStyleVisibility));
 
     removeInterchangeNodes(holder.get());
     removeUnrenderedNodes(holder.get());
@@ skipping 14 matching lines @@
         removeUnrenderedNodes(holder.get());
         restoreAndRemoveTestRenderingNodesToFragment(holder.get());
     }
 }
 
 bool ReplacementFragment::isEmpty() const
 {
     return (!m_fragment || !m_fragment->hasChildren()) && !m_hasInterchangeNewlineAtStart && !m_hasInterchangeNewlineAtEnd;
 }
 
-Node *ReplacementFragment::firstChild() const
+Node* ReplacementFragment::firstChild() const
 {
     return m_fragment ? m_fragment->firstChild() : 0;
 }
 
-Node *ReplacementFragment::lastChild() const
+Node* ReplacementFragment::lastChild() const
 {
     return m_fragment ? m_fragment->lastChild() : 0;
 }
 
-void ReplacementFragment::removeNodePreservingChildren(PassRefPtrWillBeRawPtr<Node> node)
+void ReplacementFragment::removeNodePreservingChildren(PassRefPtrWillBeRawPtr<ContainerNode> node)
 {
     if (!node)
         return;
 
     while (RefPtrWillBeRawPtr<Node> n = node->firstChild()) {
         removeNode(n);
         insertNodeBefore(n.release(), node.get());
     }
     removeNode(node);
 }
@@ skipping 15 matching lines @@
     if (!node || !refNode)
         return;
 
     ContainerNode* parent = refNode->nonShadowBoundaryParentNode();
     if (!parent)
         return;
 
     parent->insertBefore(node, refNode);
 }
 
-PassRefPtrWillBeRawPtr<Element> ReplacementFragment::insertFragmentForTestRendering(Node* rootEditableElement)
+PassRefPtrWillBeRawPtr<HTMLElement> ReplacementFragment::insertFragmentForTestRendering(Element* rootEditableElement)
 {
     ASSERT(m_document);
-    RefPtrWillBeRawPtr<Element> holder = createDefaultParagraphElement(*m_document.get());
+    RefPtrWillBeRawPtr<HTMLElement> holder = createDefaultParagraphElement(*m_document.get());
 
     holder->appendChild(m_fragment);
     rootEditableElement->appendChild(holder.get());
     m_document->updateLayoutIgnorePendingStylesheets();
 
     return holder.release();
 }
 
 void ReplacementFragment::restoreAndRemoveTestRenderingNodesToFragment(Element* holder)
 {
     if (!holder)
         return;
 
     while (RefPtrWillBeRawPtr<Node> node = holder->firstChild()) {
         holder->removeChild(node.get());
         m_fragment->appendChild(node.get());
     }
 
     removeNode(holder);
 }
 
-void ReplacementFragment::removeUnrenderedNodes(Node* holder)
+void ReplacementFragment::removeUnrenderedNodes(ContainerNode* holder)
 {
     WillBeHeapVector<RefPtrWillBeMember<Node> > unrendered;
 
     for (Node* node = holder->firstChild(); node; node = NodeTraversal::next(*node, holder))
         if (!isNodeRendered(node) && !isTableStructureNode(node))
             unrendered.append(node);
 
     size_t n = unrendered.size();
     for (size_t i = 0; i < n; ++i)
         removeNode(unrendered[i]);
 }
 
-void ReplacementFragment::removeInterchangeNodes(Node* container)
+void ReplacementFragment::removeInterchangeNodes(ContainerNode* container)
 {
     m_hasInterchangeNewlineAtStart = false;
     m_hasInterchangeNewlineAtEnd = false;
 
     // Interchange newlines at the "start" of the incoming fragment must be
     // either the first node in the fragment or the first leaf in the fragment.
     Node* node = container->firstChild();
     while (node) {
-        if (isInterchangeNewlineNode(node)) {
+        if (isInterchangeHTMLBRElement(node)) {
             m_hasInterchangeNewlineAtStart = true;
             removeNode(node);
             break;
         }
         node = node->firstChild();
     }
     if (!container->hasChildren())
         return;
     // Interchange newlines at the "end" of the incoming fragment must be
     // either the last node in the fragment or the last leaf in the fragment.
     node = container->lastChild();
     while (node) {
-        if (isInterchangeNewlineNode(node)) {
+        if (isInterchangeHTMLBRElement(node)) {
             m_hasInterchangeNewlineAtEnd = true;
             removeNode(node);
             break;
         }
         node = node->lastChild();
     }
 
     node = container->firstChild();
     while (node) {
         RefPtrWillBeRawPtr<Node> next = NodeTraversal::next(*node);
-        if (isInterchangeConvertedSpaceSpan(node)) {
-            next = NodeTraversal::nextSkippingChildren(*node);
-            removeNodePreservingChildren(node);
+        if (isHTMLInterchangeConvertedSpaceSpan(node)) {
+            HTMLElement& element = toHTMLElement(*node);
+            next = NodeTraversal::nextSkippingChildren(element);
+            removeNodePreservingChildren(&element);
         }
         node = next.get();
     }
 }
 
 inline void ReplaceSelectionCommand::InsertedNodes::respondToNodeInsertion(Node& node)
 {
     if (!m_firstNodeInserted)
         m_firstNodeInserted = &node;
 
@@ skipping 81 matching lines @@
     VisiblePosition next = endOfInsertedContent.next(CannotCrossEditingBoundary);
     if (next.isNull())
         return false;
 
     return !selectionEndWasEndOfParagraph
         && isEndOfParagraph(endOfInsertedContent)
         && !isHTMLBRElement(*endOfInsertedContent.deepEquivalent().deprecatedNode())
         && shouldMerge(endOfInsertedContent, next);
 }
 
-static bool isMailPasteAsQuotationNode(const Node* node)
+static bool isMailPasteAsQuotationHTMLBlockQuoteElement(const Node* node)
 {
-    if (!node || !node->hasTagName(blockquoteTag) || toElement(node)->getAttribute(classAttr) != ApplePasteAsQuotation)
+    if (!node || !node->isHTMLElement())
+        return false;
+    const HTMLElement& element = toHTMLElement(*node);
+    if (!element.hasTagName(blockquoteTag) || element.getAttribute(classAttr) != ApplePasteAsQuotation)
         return false;
     UseCounter::count(node->document(), UseCounter::EditingApplePasteAsQuotation);
     return true;
 }
 
-static bool isHeaderElement(const Node* a)
+static bool isHTMLHeaderElement(const Node* a)
 {
     if (!a || !a->isHTMLElement())
         return false;
 
     const HTMLElement& element = toHTMLElement(*a);
     return element.hasTagName(h1Tag)
         || element.hasTagName(h2Tag)
         || element.hasTagName(h3Tag)
         || element.hasTagName(h4Tag)
         || element.hasTagName(h5Tag)
         || element.hasTagName(h6Tag);
 }
 
-static bool haveSameTagName(Node* a, Node* b)
+static bool haveSameTagName(Element* a, Element* b)
 {
-    return a && b && a->isElementNode() && b->isElementNode() && toElement(a)->tagName() == toElement(b)->tagName();
+    return a && b && a->tagName() == b->tagName();
 }
 
 bool ReplaceSelectionCommand::shouldMerge(const VisiblePosition& source, const VisiblePosition& destination)
 {
     if (source.isNull() || destination.isNull())
         return false;
 
     Node* sourceNode = source.deepEquivalent().deprecatedNode();
     Node* destinationNode = destination.deepEquivalent().deprecatedNode();
     Element* sourceBlock = enclosingBlock(sourceNode);
     Element* destinationBlock = enclosingBlock(destinationNode);
-    return !enclosingNodeOfType(source.deepEquivalent(), &isMailPasteAsQuotationNode)
+    return !enclosingNodeOfType(source.deepEquivalent(), &isMailPasteAsQuotationHTMLBlockQuoteElement)
         && sourceBlock && (!sourceBlock->hasTagName(blockquoteTag) || isMailHTMLBlockquoteElement(sourceBlock))
         && enclosingListChild(sourceBlock) == enclosingListChild(destinationNode)
         && enclosingTableCell(source.deepEquivalent()) == enclosingTableCell(destination.deepEquivalent())
-        && (!isHeaderElement(sourceBlock) || haveSameTagName(sourceBlock, destinationBlock))
+        && (!isHTMLHeaderElement(sourceBlock) || haveSameTagName(sourceBlock, destinationBlock))
         // Don't merge to or from a position before or after a block because it would
         // be a no-op and cause infinite recursion.
         && !isBlock(sourceNode) && !isBlock(destinationNode);
 }
 
 // Style rules that match just inserted elements could change their appearance, like
 // a div inserted into a document with div { display:inline; }.
 void ReplaceSelectionCommand::removeRedundantStylesAndKeepStyleSpanInline(InsertedNodes& insertedNodes)
 {
     RefPtrWillBeRawPtr<Node> pastEndNode = insertedNodes.pastLastLeaf();
@@ skipping 17 matching lines @@
 
                 if (newInlineStyle->conflictsWithImplicitStyleOfElement(htmlElement)) {
                     // e.g. <b style="font-weight: normal;"> is converted to <span style="font-weight: normal;">
                     element = replaceElementWithSpanPreservingChildrenAndAttributes(htmlElement);
                     inlineStyle = element->inlineStyle();
                     insertedNodes.didReplaceNode(*htmlElement, *element);
                 } else if (newInlineStyle->extractConflictingImplicitStyleOfAttributes(htmlElement, EditingStyle::PreserveWritingDirection, 0, attributes,
                     EditingStyle::DoNotExtractMatchingStyle)) {
                     // e.g. <font size="3" style="font-size: 20px;"> is converted to <font style="font-size: 20px;">
                     for (size_t i = 0; i < attributes.size(); i++)
-                        removeNodeAttribute(element, attributes[i]);
+                        removeElementAttribute(htmlElement, attributes[i]);
                 }
             }
 
             ContainerNode* context = element->parentNode();
 
             // If Mail wraps the fragment with a Paste as Quotation blockquote, or if you're pasting into a quoted region,
             // styles from blockquoteNode are allowed to override those from the source document, see <rdar://problem/4930986> and <rdar://problem/5089327>.
-            Node* blockquoteNode = !context || isMailPasteAsQuotationNode(context) ? context : enclosingNodeOfType(firstPositionInNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary);
-            if (blockquoteNode)
+            HTMLQuoteElement* blockquoteElement = !context || isMailPasteAsQuotationHTMLBlockQuoteElement(context) ?
+                toHTMLQuoteElement(context) :
+                toHTMLQuoteElement(enclosingNodeOfType(firstPositionInNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary));
+            if (blockquoteElement)
                 newInlineStyle->removeStyleFromRulesAndContext(element, document().documentElement());
 
             newInlineStyle->removeStyleFromRulesAndContext(element, context);
         }
 
         if (!inlineStyle || newInlineStyle->isEmpty()) {
             if (isStyleSpanOrSpanWithOnlyStyleAttribute(element) || isEmptyFontTag(element, AllowNonEmptyStyleAttribute)) {
                 insertedNodes.willRemoveNodePreservingChildren(*element);
                 removeNodePreservingChildren(element);
                 continue;
             }
-            removeNodeAttribute(element, styleAttr);
+            removeElementAttribute(element, styleAttr);
         } else if (newInlineStyle->style()->propertyCount() != inlineStyle->propertyCount()) {
             setNodeAttribute(element, styleAttr, AtomicString(newInlineStyle->style()->asText()));
         }
 
         // FIXME: Tolerate differences in id, class, and style attributes.
         if (element->parentNode() && isNonTableCellHTMLBlockElement(element) && areIdenticalElements(element, element->parentNode())
             && VisiblePosition(firstPositionInNode(element->parentNode())) == VisiblePosition(firstPositionInNode(element))
             && VisiblePosition(lastPositionInNode(element->parentNode())) == VisiblePosition(lastPositionInNode(element))) {
             insertedNodes.willRemoveNodePreservingChildren(*element);
             removeNodePreservingChildren(element);
             continue;
         }
 
         if (element->parentNode() && element->parentNode()->rendererIsRichlyEditable())
-            removeNodeAttribute(element, contenteditableAttr);
+            removeElementAttribute(element, contenteditableAttr);
 
         // WebKit used to not add display: inline and float: none on copy.
         // Keep this code around for backward compatibility
-        if (isLegacyAppleStyleSpan(element)) {
+        if (isLegacyAppleHTMLSpanElement(element)) {
             if (!element->hasChildren()) {
                 insertedNodes.willRemoveNodePreservingChildren(*element);
                 removeNodePreservingChildren(element);
                 continue;
             }
             // There are other styles that style rules can give to style spans,
             // but these are the two important ones because they'll prevent
             // inserted content from appearing in the right paragraph.
             // FIXME: Hyatt is concerned that selectively using display:inline will give inconsistent
             // results. We already know one issue because td elements ignore their display property
@@ skipping 68 matching lines @@
 void ReplaceSelectionCommand::makeInsertedContentRoundTrippableWithHTMLTreeBuilder(const InsertedNodes& insertedNodes)
 {
     RefPtrWillBeRawPtr<Node> pastEndNode = insertedNodes.pastLastLeaf();
     RefPtrWillBeRawPtr<Node> next = nullptr;
     for (RefPtrWillBeRawPtr<Node> node = insertedNodes.firstNodeInserted(); node && node != pastEndNode; node = next) {
         next = NodeTraversal::next(*node);
 
         if (!node->isHTMLElement())
             continue;
 
-        if (isProhibitedParagraphChild(toHTMLElement(node)->localName())) {
-            if (HTMLElement* paragraphElement = toHTMLElement(enclosingElementWithTag(positionInParentBeforeNode(*node), pTag)))
-                moveNodeOutOfAncestor(node, paragraphElement);
+        HTMLElement& element = toHTMLElement(*node);
+        if (isProhibitedParagraphChild(element.localName())) {
+            if (HTMLElement* paragraphElement = toHTMLElement(enclosingElementWithTag(positionInParentBeforeNode(element), pTag)))
+                moveElementOutOfAncestor(&element, paragraphElement);
         }
 
-        if (isHeaderElement(node.get())) {
-            if (HTMLElement* headerElement = toHTMLElement(highestEnclosingNodeOfType(positionInParentBeforeNode(*node), isHeaderElement)))
-                moveNodeOutOfAncestor(node, headerElement);
+        if (isHTMLHeaderElement(&element)) {
+            if (HTMLElement* headerElement = toHTMLElement(highestEnclosingNodeOfType(positionInParentBeforeNode(element), isHTMLHeaderElement)))
+                moveElementOutOfAncestor(&element, headerElement);
         }
     }
 }
 
-void ReplaceSelectionCommand::moveNodeOutOfAncestor(PassRefPtrWillBeRawPtr<Node> prpNode, PassRefPtrWillBeRawPtr<ContainerNode> prpAncestor)
+void ReplaceSelectionCommand::moveElementOutOfAncestor(PassRefPtrWillBeRawPtr<Element> prpElement, PassRefPtrWillBeRawPtr<ContainerNode> prpAncestor)
 {
-    RefPtrWillBeRawPtr<Node> node = prpNode;
-    RefPtrWillBeRawPtr<Node> ancestor = prpAncestor;
+    RefPtrWillBeRawPtr<Element> element = prpElement;
+    RefPtrWillBeRawPtr<ContainerNode> ancestor = prpAncestor;
 
     if (!ancestor->parentNode()->hasEditableStyle())
         return;
 
-    VisiblePosition positionAtEndOfNode(lastPositionInOrAfterNode(node.get()));
+    VisiblePosition positionAtEndOfNode(lastPositionInOrAfterNode(element.get()));
     VisiblePosition lastPositionInParagraph(lastPositionInNode(ancestor.get()));
     if (positionAtEndOfNode == lastPositionInParagraph) {
-        removeNode(node);
+        removeNode(element);
         if (ancestor->nextSibling())
-            insertNodeBefore(node, ancestor->nextSibling());
+            insertNodeBefore(element, ancestor->nextSibling());
         else
-            appendNode(node, ancestor->parentNode());
+            appendNode(element, ancestor->parentNode());
     } else {
-        RefPtrWillBeRawPtr<Node> nodeToSplitTo = splitTreeToNode(node.get(), ancestor.get(), true);
-        removeNode(node);
-        insertNodeBefore(node, nodeToSplitTo);
+        RefPtrWillBeRawPtr<Node> nodeToSplitTo = splitTreeToNode(element.get(), ancestor.get(), true);
+        removeNode(element);
+        insertNodeBefore(element, nodeToSplitTo);
     }
     if (!ancestor->hasChildren())
         removeNode(ancestor.release());
 }
 
 static inline bool nodeHasVisibleRenderText(Text& text)
 {
     return text.renderer() && text.renderer()->renderedTextLength() > 0;
 }
 
@@ skipping 14 matching lines @@
     Node* firstNodeInserted = insertedNodes.firstNodeInserted();
     if (firstNodeInserted && firstNodeInserted->isTextNode() && !nodeHasVisibleRenderText(toText(*firstNodeInserted))) {
         insertedNodes.willRemoveNode(*firstNodeInserted);
         removeNode(firstNodeInserted);
     }
 }
 
 VisiblePosition ReplaceSelectionCommand::positionAtEndOfInsertedContent() const
 {
     // FIXME: Why is this hack here?  What's special about <select> tags?
-    Element* enclosingSelect = enclosingElementWithTag(m_endOfInsertedContent, selectTag);
+    HTMLSelectElement* enclosingSelect = toHTMLSelectElement(enclosingElementWithTag(m_endOfInsertedContent, selectTag));
     return VisiblePosition(enclosingSelect ? lastPositionInOrAfterNode(enclosingSelect) : m_endOfInsertedContent);
 }
 
 VisiblePosition ReplaceSelectionCommand::positionAtStartOfInsertedContent() const
 {
     return VisiblePosition(m_startOfInsertedContent);
 }
 
 static void removeHeadContents(ReplacementFragment& fragment)
 {
@@ skipping 13 matching lines @@
 }
 
 // Remove style spans before insertion if they are unnecessary.  It's faster because we'll
 // avoid doing a layout.
 static bool handleStyleSpansBeforeInsertion(ReplacementFragment& fragment, const Position& insertionPos)
 {
     Node* topNode = fragment.firstChild();
 
     // Handling the case where we are doing Paste as Quotation or pasting into quoted content is more complicated (see handleStyleSpans)
     // and doesn't receive the optimization.
-    if (isMailPasteAsQuotationNode(topNode) || enclosingNodeOfType(firstPositionInOrBeforeNode(topNode), isMailHTMLBlockquoteElement, CanCrossEditingBoundary))
+    if (isMailPasteAsQuotationHTMLBlockQuoteElement(topNode) || enclosingNodeOfType(firstPositionInOrBeforeNode(topNode), isMailHTMLBlockquoteElement, CanCrossEditingBoundary))
         return false;
 
     // Either there are no style spans in the fragment or a WebKit client has added content to the fragment
     // before inserting it.  Look for and handle style spans after insertion.
-    if (!isLegacyAppleStyleSpan(topNode))
+    if (!isLegacyAppleHTMLSpanElement(topNode))
         return false;
 
-    Node* wrappingStyleSpan = topNode;
+    HTMLSpanElement* wrappingStyleSpan = toHTMLSpanElement(topNode);
     RefPtrWillBeRawPtr<EditingStyle> styleAtInsertionPos = EditingStyle::create(insertionPos.parentAnchoredEquivalent());
     String styleText = styleAtInsertionPos->style()->asText();
 
     // FIXME: This string comparison is a naive way of comparing two styles.
     // We should be taking the diff and check that the diff is empty.
-    if (styleText != toElement(wrappingStyleSpan)->getAttribute(styleAttr))
+    if (styleText != wrappingStyleSpan->getAttribute(styleAttr))
         return false;
 
     fragment.removeNodePreservingChildren(wrappingStyleSpan);
     return true;
 }
 
 // At copy time, WebKit wraps copied content in a span that contains the source document's
 // default styles.  If the copied Range inherits any other styles from its ancestors, we put
 // those styles on a second span.
 // This function removes redundant styles from those spans, and removes the spans if all their
 // styles are redundant.
 // We should remove the Apple-style-span class when we're done, see <rdar://problem/5685600>.
 // We should remove styles from spans that are overridden by all of their children, either here
 // or at copy time.
 void ReplaceSelectionCommand::handleStyleSpans(InsertedNodes& insertedNodes)
 {
-    HTMLElement* wrappingStyleSpan = 0;
+    HTMLSpanElement* wrappingStyleSpan = 0;
     // The style span that contains the source document's default style should be at
     // the top of the fragment, but Mail sometimes adds a wrapper (for Paste As Quotation),
     // so search for the top level style span instead of assuming it's at the top.
     for (Node* node = insertedNodes.firstNodeInserted(); node; node = NodeTraversal::next(*node)) {
-        if (isLegacyAppleStyleSpan(node)) {
-            wrappingStyleSpan = toHTMLElement(node);
+        if (isLegacyAppleHTMLSpanElement(node)) {
+            wrappingStyleSpan = toHTMLSpanElement(node);
             break;
         }
     }
 
     // There might not be any style spans if we're pasting from another application or if
     // we are here because of a document.execCommand("InsertHTML", ...) call.
     if (!wrappingStyleSpan)
         return;
 
     RefPtrWillBeRawPtr<EditingStyle> style = EditingStyle::create(wrappingStyleSpan->inlineStyle());
     ContainerNode* context = wrappingStyleSpan->parentNode();
 
     // If Mail wraps the fragment with a Paste as Quotation blockquote, or if you're pasting into a quoted region,
-    // styles from blockquoteNode are allowed to override those from the source document, see <rdar://problem/4930986> and <rdar://problem/5089327>.
-    Node* blockquoteNode = isMailPasteAsQuotationNode(context) ? context : enclosingNodeOfType(firstPositionInNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary);
-    if (blockquoteNode)
+    // styles from blockquoteElement are allowed to override those from the source document, see <rdar://problem/4930986> and <rdar://problem/5089327>.
+    HTMLQuoteElement* blockquoteElement = isMailPasteAsQuotationHTMLBlockQuoteElement(context) ?
+        toHTMLQuoteElement(context) :
+        toHTMLQuoteElement(enclosingNodeOfType(firstPositionInNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary));
+    if (blockquoteElement)
         context = document().documentElement();
 
     // This operation requires that only editing styles to be removed from sourceDocumentStyle.
     style->prepareToApplyAt(firstPositionInNode(context));
 
     // Remove block properties in the span's style. This prevents properties that probably have no effect
     // currently from affecting blocks later if the style is cloned for a new block element during a future
     // editing operation.
     // FIXME: They *can* have an effect currently if blocks beneath the style span aren't individually marked
     // with block styles by the editing engine used to style them.  WebKit doesn't do this, but others might.
@@ skipping 59 matching lines @@
         // Stop if any previous sibling is a block.
         for (Node* sibling = node->previousSibling(); sibling; sibling = sibling->previousSibling()) {
             if (isBlockFlowElement(*sibling))
                 return node;
         }
         node = parent;
     }
     return node;
 }
 
-static bool isInlineNodeWithStyle(const Node* node)
+static bool isInlineHTMLElementWithStyle(const Node* node)
 {
     // We don't want to skip over any block elements.
     if (isBlock(node))
         return false;
 
     if (!node->isHTMLElement())
         return false;
 
     // We can skip over elements whose class attribute is
     // one of our internal classes.
     const HTMLElement* element = toHTMLElement(node);
     const AtomicString& classAttributeValue = element->getAttribute(classAttr);
     if (classAttributeValue == AppleTabSpanClass) {
-        UseCounter::count(node->document(), UseCounter::EditingAppleTabSpanClass);
+        UseCounter::count(element->document(), UseCounter::EditingAppleTabSpanClass);
         return true;
     }
     if (classAttributeValue == AppleConvertedSpace) {
-        UseCounter::count(node->document(), UseCounter::EditingAppleConvertedSpace);
+        UseCounter::count(element->document(), UseCounter::EditingAppleConvertedSpace);
         return true;
     }
     if (classAttributeValue == ApplePasteAsQuotation) {
-        UseCounter::count(node->document(), UseCounter::EditingApplePasteAsQuotation);
+        UseCounter::count(element->document(), UseCounter::EditingApplePasteAsQuotation);
         return true;
     }
 
     return EditingStyle::elementIsStyledSpanOrHTMLEquivalent(element);
 }
 
-inline Node* nodeToSplitToAvoidPastingIntoInlineNodesWithStyle(const Position& insertionPos)
+static inline HTMLElement* elementToSplitToAvoidPastingIntoInlineElementsWithStyle(const Position& insertionPos)
 {
     Element* containingBlock = enclosingBlock(insertionPos.containerNode());
-    return highestEnclosingNodeOfType(insertionPos, isInlineNodeWithStyle, CannotCrossEditingBoundary, containingBlock);
+    return toHTMLElement(highestEnclosingNodeOfType(insertionPos, isInlineHTMLElementWithStyle, CannotCrossEditingBoundary, containingBlock));
 }
 
 void ReplaceSelectionCommand::doApply()
 {
     VisibleSelection selection = endingSelection();
     ASSERT(selection.isCaretOrRange());
     ASSERT(selection.start().deprecatedNode());
     if (!selection.isNonOrphanedCaretOrRange() || !selection.start().deprecatedNode())
         return;
 
@@ skipping 13 matching lines @@
         m_insertionStyle = EditingStyle::create(selection.start());
         m_insertionStyle->mergeTypingStyle(&document());
     }
 
     VisiblePosition visibleStart = selection.visibleStart();
     VisiblePosition visibleEnd = selection.visibleEnd();
 
     bool selectionEndWasEndOfParagraph = isEndOfParagraph(visibleEnd);
     bool selectionStartWasStartOfParagraph = isStartOfParagraph(visibleStart);
 
-    Node* enclosingBlockOfVisibleStart = enclosingBlock(visibleStart.deepEquivalent().deprecatedNode());
+    Element* enclosingBlockOfVisibleStart = enclosingBlock(visibleStart.deepEquivalent().deprecatedNode());
 
     Position insertionPos = selection.start();
     bool startIsInsideMailBlockquote = enclosingNodeOfType(insertionPos, isMailHTMLBlockquoteElement, CanCrossEditingBoundary);
     bool selectionIsPlainText = !selection.isContentRichlyEditable();
     Element* currentRoot = selection.rootEditableElement();
 
     if ((selectionStartWasStartOfParagraph && selectionEndWasEndOfParagraph && !startIsInsideMailBlockquote) ||
         enclosingBlockOfVisibleStart == currentRoot || isListItem(enclosingBlockOfVisibleStart) || selectionIsPlainText)
         m_preventNesting = false;
 
@@ skipping 56 matching lines @@
     // Inserting content could cause whitespace to collapse, e.g. inserting <div>foo</div> into hello^ world.
     prepareWhitespaceAtPositionForSplit(insertionPos);
 
     // If the downstream node has been removed there's no point in continuing.
     if (!insertionPos.downstream().deprecatedNode())
       return;
 
     // NOTE: This would be an incorrect usage of downstream() if downstream() were changed to mean the last position after
     // p that maps to the same visible position as p (since in the case where a br is at the end of a block and collapsed
     // away, there are positions after the br which map to the same visible position as [br, 0]).
-    Node* endBR = isHTMLBRElement(*insertionPos.downstream().deprecatedNode()) ? insertionPos.downstream().deprecatedNode() : 0;
+    HTMLBRElement* endBR = isHTMLBRElement(*insertionPos.downstream().deprecatedNode()) ? toHTMLBRElement(insertionPos.downstream().deprecatedNode()) : 0;
     VisiblePosition originalVisPosBeforeEndBR;
     if (endBR)
         originalVisPosBeforeEndBR = VisiblePosition(positionBeforeNode(endBR), DOWNSTREAM).previous();
 
-    RefPtrWillBeRawPtr<Node> enclosingBlockOfInsertionPos = enclosingBlock(insertionPos.deprecatedNode());
+    RefPtrWillBeRawPtr<Element> enclosingBlockOfInsertionPos = enclosingBlock(insertionPos.deprecatedNode());
 
     // Adjust insertionPos to prevent nesting.
     // If the start was in a Mail blockquote, we will have already handled adjusting insertionPos above.
     if (m_preventNesting && enclosingBlockOfInsertionPos && !isTableCell(enclosingBlockOfInsertionPos.get()) && !startIsInsideMailBlockquote) {
         ASSERT(enclosingBlockOfInsertionPos != currentRoot);
         VisiblePosition visibleInsertionPos(insertionPos);
         if (isEndOfBlock(visibleInsertionPos) && !(isStartOfBlock(visibleInsertionPos) && fragment.hasInterchangeNewlineAtEnd()))
             insertionPos = positionInParentAfterNode(*enclosingBlockOfInsertionPos);
         else if (isStartOfBlock(visibleInsertionPos))
             insertionPos = positionInParentBeforeNode(*enclosingBlockOfInsertionPos);
@@ skipping 28 matching lines @@
     // This way we can produce a less verbose markup.
     // We can skip this optimization for fragments not wrapped in one of
     // our style spans and for positions inside list items
     // since insertAsListItems already does the right thing.
     if (!m_matchStyle && !enclosingList(insertionPos.containerNode())) {
         if (insertionPos.containerNode()->isTextNode() && insertionPos.offsetInContainerNode() && !insertionPos.atLastEditingPositionForNode()) {
             splitTextNode(insertionPos.containerText(), insertionPos.offsetInContainerNode());
             insertionPos = firstPositionInNode(insertionPos.containerNode());
         }
 
-        if (RefPtrWillBeRawPtr<Node> nodeToSplitTo = nodeToSplitToAvoidPastingIntoInlineNodesWithStyle(insertionPos)) {
-            if (insertionPos.containerNode() != nodeToSplitTo->parentNode()) {
+        if (RefPtrWillBeRawPtr<HTMLElement> elementToSplitTo = elementToSplitToAvoidPastingIntoInlineElementsWithStyle(insertionPos)) {
+            if (insertionPos.containerNode() != elementToSplitTo->parentNode()) {
                 Node* splitStart = insertionPos.computeNodeAfterPosition();
                 if (!splitStart)
                     splitStart = insertionPos.containerNode();
-                nodeToSplitTo = splitTreeToNode(splitStart, nodeToSplitTo->parentNode()).get();
+                RefPtrWillBeRawPtr<Node> nodeToSplitTo = splitTreeToNode(splitStart, elementToSplitTo->parentNode()).get();
                 insertionPos = positionInParentBeforeNode(*nodeToSplitTo);
             }
         }
     }
 
     // FIXME: When pasting rich content we're often prevented from heading down the fast path by style spans.  Try
     // again here if they've been removed.
 
     // 1) Insert the content.
     // 2) Remove redundant styles and style tags, this inner <b> for example: <b>foo <b>bar</b> baz</b>.
     // 3) Merge the start of the added content with the content before the position being pasted into.
     // 4) Do one of the following: a) expand the last br if the fragment ends with one and it collapsed,
     // b) merge the last paragraph of the incoming fragment with the paragraph that contained the
     // end of the selection that was pasted into, or c) handle an interchange newline at the end of the
     // incoming fragment.
     // 5) Add spaces for smart replace.
     // 6) Select the replacement if requested, and match style if requested.
 
     InsertedNodes insertedNodes;
     RefPtrWillBeRawPtr<Node> refNode = fragment.firstChild();
     ASSERT(refNode);
     RefPtrWillBeRawPtr<Node> node = refNode->nextSibling();
 
     fragment.removeNode(refNode);
 
-    Node* blockStart = enclosingBlock(insertionPos.deprecatedNode());
-    if ((isHTMLListElement(refNode.get()) || (isLegacyAppleStyleSpan(refNode.get()) && isHTMLListElement(refNode->firstChild())))
+    Element* blockStart = enclosingBlock(insertionPos.deprecatedNode());
+    if ((isHTMLListElement(refNode.get()) || (isLegacyAppleHTMLSpanElement(refNode.get()) && isHTMLListElement(refNode->firstChild())))
         && blockStart && blockStart->renderer()->isListItem())
         refNode = insertAsListItems(toHTMLElement(refNode), blockStart, insertionPos, insertedNodes);
     else {
         insertNodeAt(refNode, insertionPos);
         insertedNodes.respondToNodeInsertion(*refNode);
     }
 
     // Mutation events (bug 22634) may have already removed the inserted content
     if (!refNode->inDocument())
         return;
@@ skipping 96 matching lines @@
     }
 
     Position lastPositionToSelect;
     if (fragment.hasInterchangeNewlineAtEnd()) {
         VisiblePosition endOfInsertedContent = positionAtEndOfInsertedContent();
         VisiblePosition next = endOfInsertedContent.next(CannotCrossEditingBoundary);
 
         if (selectionEndWasEndOfParagraph || !isEndOfParagraph(endOfInsertedContent) || next.isNull()) {
             if (!isStartOfParagraph(endOfInsertedContent)) {
                 setEndingSelection(endOfInsertedContent);
-                Node* enclosingNode = enclosingBlock(endOfInsertedContent.deepEquivalent().deprecatedNode());
-                if (isListItem(enclosingNode)) {
+                Element* enclosingBlockElement = enclosingBlock(endOfInsertedContent.deepEquivalent().deprecatedNode());
+                if (isListItem(enclosingBlockElement)) {
                     RefPtrWillBeRawPtr<HTMLLIElement> newListItem = createListItemElement(document());
-                    insertNodeAfter(newListItem, enclosingNode);
+                    insertNodeAfter(newListItem, enclosingBlockElement);
                     setEndingSelection(VisiblePosition(firstPositionInNode(newListItem.get())));
                 } else {
                     // Use a default paragraph element (a plain div) for the empty paragraph, using the last paragraph
                     // block's style seems to annoy users.
                     insertParagraphSeparator(true, !startIsInsideMailBlockquote && highestEnclosingNodeOfType(endOfInsertedContent.deepEquivalent(),
                         isMailHTMLBlockquoteElement, CannotCrossEditingBoundary, insertedNodes.firstNodeInserted()->parentNode()));
                 }
 
                 // Select up to the paragraph separator that was added.
                 lastPositionToSelect = endingSelection().visibleStart().deepEquivalent();
                 updateNodesInserted(lastPositionToSelect.deprecatedNode());
             }
         } else {
             // Select up to the beginning of the next paragraph.
             lastPositionToSelect = next.deepEquivalent().downstream();
         }
+    } else {
+        mergeEndIfNeeded();
+    }
 
-    } else
-        mergeEndIfNeeded();
-
-    if (Node* mailBlockquote = enclosingNodeOfType(positionAtStartOfInsertedContent().deepEquivalent(), isMailPasteAsQuotationNode))
-        removeNodeAttribute(toElement(mailBlockquote), classAttr);
+    if (HTMLQuoteElement* mailBlockquote = toHTMLQuoteElement(enclosingNodeOfType(positionAtStartOfInsertedContent().deepEquivalent(), isMailPasteAsQuotationHTMLBlockQuoteElement)))
+        removeElementAttribute(mailBlockquote, classAttr);
 
     if (shouldPerformSmartReplace())
         addSpacesForSmartReplace();
 
     // If we are dealing with a fragment created from plain text
     // no style matching is necessary.
     if (plainTextFragment)
         m_matchStyle = false;
 
     completeHTMLReplacement(lastPositionToSelect);
 }
 
-bool ReplaceSelectionCommand::shouldRemoveEndBR(Node* endBR, const VisiblePosition& originalVisPosBeforeEndBR)
+bool ReplaceSelectionCommand::shouldRemoveEndBR(HTMLBRElement* endBR, const VisiblePosition& originalVisPosBeforeEndBR)
 {
     if (!endBR || !endBR->inDocument())
         return false;
 
     VisiblePosition visiblePos(positionBeforeNode(endBR));
 
     // Don't remove the br if nothing was inserted.
     if (visiblePos.previous() == originalVisPosBeforeEndBR)
         return false;
 
     // Remove the br if it is collapsed away and so is unnecessary.
     if (!document().inNoQuirksMode() && isEndOfBlock(visiblePos) && !isStartOfParagraph(visiblePos))
         return true;
 
     // A br that was originally holding a line open should be displaced by inserted content or turned into a line break.
     // A br that was originally acting as a line break should still be acting as a line break, not as a placeholder.
     return isStartOfParagraph(visiblePos) && isEndOfParagraph(visiblePos);
 }
 
 bool ReplaceSelectionCommand::shouldPerformSmartReplace() const
 {
     if (!m_smartReplace)
         return false;
 
-    Element* textControl = enclosingTextFormControl(positionAtStartOfInsertedContent().deepEquivalent());
+    HTMLTextFormControlElement* textControl = enclosingTextFormControl(positionAtStartOfInsertedContent().deepEquivalent());
     if (isHTMLInputElement(textControl) && toHTMLInputElement(textControl)->isPasswordField())
         return false; // Disable smart replace for password fields.
 
     return true;
 }
 
 static bool isCharacterSmartReplaceExemptConsideringNonBreakingSpace(UChar32 character, bool previousCharacter)
 {
     return isCharacterSmartReplaceExempt(character == noBreakSpace ? ' ' : character, previousCharacter);
 }
@@ skipping 12 matching lines @@
     }
 
     bool needsTrailingSpace = !isEndOfParagraph(endOfInsertedContent) && !isCharacterSmartReplaceExemptConsideringNonBreakingSpace(endOfInsertedContent.characterAfter(), false);
     if (needsTrailingSpace && endNode) {
         bool collapseWhiteSpace = !endNode->renderer() || endNode->renderer()->style()->collapseWhiteSpace();
         if (endNode->isTextNode()) {
             insertTextIntoNode(toText(endNode), endOffset, collapseWhiteSpace ? nonBreakingSpaceString() : " ");
             if (m_endOfInsertedContent.containerNode() == endNode)
                 m_endOfInsertedContent.moveToOffset(m_endOfInsertedContent.offsetInContainerNode() + 1);
         } else {
-            RefPtrWillBeRawPtr<Node> node = document().createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
+            RefPtrWillBeRawPtr<Text> node = document().createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
             insertNodeAfter(node, endNode);
             updateNodesInserted(node.get());
         }
     }
 
     document().updateLayout();
 
     Position startDownstream = startOfInsertedContent.deepEquivalent().downstream();
     Node* startNode = startDownstream.computeNodeAfterPosition();
     unsigned startOffset = 0;
     if (startDownstream.anchorType() == Position::PositionIsOffsetInAnchor) {
         startNode = startDownstream.containerNode();
         startOffset = startDownstream.offsetInContainerNode();
     }
 
     bool needsLeadingSpace = !isStartOfParagraph(startOfInsertedContent) && !isCharacterSmartReplaceExemptConsideringNonBreakingSpace(startOfInsertedContent.previous().characterAfter(), true);
     if (needsLeadingSpace && startNode) {
         bool collapseWhiteSpace = !startNode->renderer() || startNode->renderer()->style()->collapseWhiteSpace();
         if (startNode->isTextNode()) {
             insertTextIntoNode(toText(startNode), startOffset, collapseWhiteSpace ? nonBreakingSpaceString() : " ");
             if (m_endOfInsertedContent.containerNode() == startNode && m_endOfInsertedContent.offsetInContainerNode())
                 m_endOfInsertedContent.moveToOffset(m_endOfInsertedContent.offsetInContainerNode() + 1);
         } else {
-            RefPtrWillBeRawPtr<Node> node = document().createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
+            RefPtrWillBeRawPtr<Text> node = document().createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
             // Don't updateNodesInserted. Doing so would set m_endOfInsertedContent to be the node containing the leading space,
             // but m_endOfInsertedContent is supposed to mark the end of pasted content.
             insertNodeBefore(node, startNode);
             m_startOfInsertedContent = firstPositionInNode(node.get());
         }
     }
 }
 
 void ReplaceSelectionCommand::completeHTMLReplacement(const Position &lastPositionToSelect)
 {
@@ skipping 83 matching lines @@
     }
 }
 
 EditAction ReplaceSelectionCommand::editingAction() const
 {
     return m_editAction;
 }
 
 // If the user is inserting a list into an existing list, instead of nesting the list,
 // we put the list items into the existing list.
-Node* ReplaceSelectionCommand::insertAsListItems(PassRefPtrWillBeRawPtr<HTMLElement> prpListElement, Node* insertionBlock, const Position& insertPos, InsertedNodes& insertedNodes)
+Node* ReplaceSelectionCommand::insertAsListItems(PassRefPtrWillBeRawPtr<HTMLElement> prpListElement, Element* insertionBlock, const Position& insertPos, InsertedNodes& insertedNodes)
 {
     RefPtrWillBeRawPtr<HTMLElement> listElement = prpListElement;
 
     while (listElement->hasOneChild() && isHTMLListElement(listElement->firstChild()))
         listElement = toHTMLElement(listElement->firstChild());
 
     bool isStart = isStartOfParagraph(VisiblePosition(insertPos));
     bool isEnd = isEndOfParagraph(VisiblePosition(insertPos));
     bool isMiddle = !isStart && !isEnd;
     Node* lastNode = insertionBlock;
@@ skipping 44 matching lines @@
 bool ReplaceSelectionCommand::performTrivialReplace(const ReplacementFragment& fragment)
 {
     if (!fragment.firstChild() || fragment.firstChild() != fragment.lastChild() || !fragment.firstChild()->isTextNode())
         return false;
 
     // FIXME: Would be nice to handle smart replace in the fast path.
     if (m_smartReplace || fragment.hasInterchangeNewlineAtStart() || fragment.hasInterchangeNewlineAtEnd())
         return false;
 
     // e.g. when "bar" is inserted after "foo" in <div><u>foo</u></div>, "bar" should not be underlined.
-    if (nodeToSplitToAvoidPastingIntoInlineNodesWithStyle(endingSelection().start()))
+    if (elementToSplitToAvoidPastingIntoInlineElementsWithStyle(endingSelection().start()))
         return false;
 
     RefPtrWillBeRawPtr<Node> nodeAfterInsertionPos = endingSelection().end().downstream().anchorNode();
     Text* textNode = toText(fragment.firstChild());
     // Our fragment creation code handles tabs, spaces, and newlines, so we don't have to worry about those here.
 
     Position start = endingSelection().start();
     Position end = replaceSelectedTextInNode(textNode->data());
     if (end.isNull())
         return false;
 
     if (nodeAfterInsertionPos && nodeAfterInsertionPos->parentNode() && isHTMLBRElement(*nodeAfterInsertionPos)
-        && shouldRemoveEndBR(nodeAfterInsertionPos.get(), VisiblePosition(positionBeforeNode(nodeAfterInsertionPos.get()))))
+        && shouldRemoveEndBR(toHTMLBRElement(nodeAfterInsertionPos.get()), VisiblePosition(positionBeforeNode(nodeAfterInsertionPos.get()))))
         removeNodeAndPruneAncestors(nodeAfterInsertionPos.get());
 
     VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
 
     setEndingSelection(selectionAfterReplace);
 
     return true;
 }
 
 void ReplaceSelectionCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_startOfInsertedContent);
     visitor->trace(m_endOfInsertedContent);
     visitor->trace(m_insertionStyle);
     visitor->trace(m_documentFragment);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink