Implement CustomElement::isValidName()

third_party/WebKit/Source/core/dom/custom/CustomElement.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/custom/CustomElement.h"
 
 #include "platform/text/Character.h"
+#include "wtf/text/AtomicStringHash.h"
 
 namespace blink {
 
+bool CustomElement::isValidName(const AtomicString& name)
+{
+    if (!isPotentialCustomElementName(name))
+        return false;
+
+    // https://html.spec.whatwg.org/multipage/scripting.html#valid-custom-element-name
+    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, hyphenContainingElementNames, ());
+    if (hyphenContainingElementNames.isEmpty()) {
+        hyphenContainingElementNames.add("annotation-xml");
+        hyphenContainingElementNames.add("color-profile");
+        hyphenContainingElementNames.add("font-face");
+        hyphenContainingElementNames.add("font-face-src");
+        hyphenContainingElementNames.add("font-face-uri");
+        hyphenContainingElementNames.add("font-face-format");
+        hyphenContainingElementNames.add("font-face-name");
+        hyphenContainingElementNames.add("missing-glyph");
+    }
+
+    return !hyphenContainingElementNames.contains(name);
+}
+
 bool CustomElement::isPotentialCustomElementName(const AtomicString& name)
 {
     if (!name.length() || name[0] < 'a' || name[0] > 'z')
         return false;
 
     bool hasHyphens = false;
     for (size_t i = 1; i < name.length(); ) {
         UChar32 ch;
         if (name.is8Bit())
             ch = name[i++];
         else
             U16_NEXT(name.characters16(), i, name.length(), ch);
         if (ch == '-')
             hasHyphens = true;
         else if (!Character::isPotentialCustomElementNameChar(ch))
             return false;
     }
     return hasHyphens;
 }
 
 } // namespace blink