Introduce LiteralSet

Source/core/editing/ReplaceSelectionCommand.cpp

Index: Source/core/editing/ReplaceSelectionCommand.cpp
diff --git a/Source/core/editing/ReplaceSelectionCommand.cpp b/Source/core/editing/ReplaceSelectionCommand.cpp
index bfda5b2611d21baf78c87fc11322adc76ea2dd1a..033e9128ac82dc87fc29055251440cb9cc9e37c2 100644
--- a/Source/core/editing/ReplaceSelectionCommand.cpp
+++ b/Source/core/editing/ReplaceSelectionCommand.cpp
@@ -58,8 +58,8 @@
 #include "core/rendering/RenderInline.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderText.h"
-#include <wtf/StdLibExtras.h>
-#include <wtf/Vector.h>
+#include "wtf/StdLibExtras.h"
+#include "wtf/Vector.h"
 
 namespace WebCore {
 
@@ -558,61 +558,64 @@ void ReplaceSelectionCommand::removeRedundantStylesAndKeepStyleSpanInline(Insert
     }
 }
 
-static bool isProhibitedParagraphChild(const AtomicString& name)
+static bool isProhibitedParagraphChild(const QualifiedName& name)
 {
     // https://dvcs.w3.org/hg/editing/raw-file/57abe6d3cb60/editing.html#prohibited-paragraph-child
-    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, elements, ());
-    if (elements.isEmpty()) {
-        elements.add(addressTag.localName());
-        elements.add(articleTag.localName());
-        elements.add(asideTag.localName());
-        elements.add(blockquoteTag.localName());
-        elements.add(captionTag.localName());
-        elements.add(centerTag.localName());
-        elements.add(colTag.localName());
-        elements.add(colgroupTag.localName());
-        elements.add(ddTag.localName());
-        elements.add(detailsTag.localName());
-        elements.add(dirTag.localName());
-        elements.add(divTag.localName());
-        elements.add(dlTag.localName());
-        elements.add(dtTag.localName());
-        elements.add(fieldsetTag.localName());
-        elements.add(figcaptionTag.localName());
-        elements.add(figureTag.localName());
-        elements.add(footerTag.localName());
-        elements.add(formTag.localName());
-        elements.add(h1Tag.localName());
-        elements.add(h2Tag.localName());
-        elements.add(h3Tag.localName());
-        elements.add(h4Tag.localName());
-        elements.add(h5Tag.localName());
-        elements.add(h6Tag.localName());
-        elements.add(headerTag.localName());
-        elements.add(hgroupTag.localName());
-        elements.add(hrTag.localName());
-        elements.add(liTag.localName());
-        elements.add(listingTag.localName());
-        elements.add(mainTag.localName()); // Missing in the specification.
-        elements.add(menuTag.localName());
-        elements.add(navTag.localName());
-        elements.add(olTag.localName());
-        elements.add(pTag.localName());
-        elements.add(plaintextTag.localName());
-        elements.add(preTag.localName());
-        elements.add(sectionTag.localName());
-        elements.add(summaryTag.localName());
-        elements.add(tableTag.localName());
-        elements.add(tbodyTag.localName());
-        elements.add(tdTag.localName());
-        elements.add(tfootTag.localName());
-        elements.add(thTag.localName());
-        elements.add(theadTag.localName());
-        elements.add(trTag.localName());
-        elements.add(ulTag.localName());
-        elements.add(xmpTag.localName());
+    DEFINE_STATIC_LOCAL(LocalNameLiteralSet, prohibitedChildren, ());
+    if (!prohibitedChildren.isInitialized()) {
+        static const QualifiedName* prohibitedChildrenData[] = {
+            &addressTag,
+            &articleTag,
+            &asideTag,
+            &blockquoteTag,
+            &captionTag,
+            &centerTag,
+            &colTag,
+            &colgroupTag,
+            &ddTag,
+            &detailsTag,
+            &dirTag,
+            &divTag,
+            &dlTag,
+            &dtTag,
+            &fieldsetTag,
+            &figcaptionTag,
+            &figureTag,
+            &footerTag,
+            &formTag,
+            &h1Tag,
+            &h2Tag,
+            &h3Tag,
+            &h4Tag,
+            &h5Tag,
+            &h6Tag,
+            &headerTag,
+            &hgroupTag,
+            &hrTag,
+            &liTag,
+            &listingTag,
+            &mainTag, // Missing in the specification.
+            &menuTag,
+            &navTag,
+            &olTag,
+            &pTag,
+            &plaintextTag,
+            &preTag,
+            &sectionTag,
+            &summaryTag,
+            &tableTag,
+            &tbodyTag,
+            &tdTag,
+            &tfootTag,
+            &thTag,
+            &theadTag,
+            &trTag,
+            &ulTag,
+            &xmpTag,
+        };
+        prohibitedChildren.init(prohibitedChildrenData, WTF_ARRAY_LENGTH(prohibitedChildrenData));
     }
-    return elements.contains(name);
+    return prohibitedChildren.contains(&name);
 }
 
 void ReplaceSelectionCommand::makeInsertedContentRoundTrippableWithHTMLTreeBuilder(InsertedNodes& insertedNodes)
@@ -625,7 +628,7 @@ void ReplaceSelectionCommand::makeInsertedContentRoundTrippableWithHTMLTreeBuild
         if (!node->isHTMLElement())
             continue;
 
-        if (isProhibitedParagraphChild(toHTMLElement(node.get())->localName())) {
+        if (isProhibitedParagraphChild(toHTMLElement(node.get())->tagQName())) {
             if (HTMLElement* paragraphElement = toHTMLElement(enclosingNodeWithTag(positionInParentBeforeNode(node.get()), pTag)))
                 moveNodeOutOfAncestor(node, paragraphElement);
         }