From 9d51b9d06a16b4725e4540a6424c71f6a1ee94c3 Mon Sep 17 00:00:00 2001
From: Gaming4JC <g4jc@hyperbola.info>
Date: Sat, 4 Jan 2020 18:59:37 -0500
Subject: Creating customized built-in elements without relevant definitions
 registered first shouldn't throw NotFoundError;

per spec change: https://github.com/w3c/webcomponents/issues/608

Tag UXP Issue #1344
---
 dom/base/nsDocument.cpp | 40 ----------------------------------------
 dom/base/nsDocument.h   | 14 --------------
 2 files changed, 54 deletions(-)

(limited to 'dom/base')

diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index fa40c41ac..a0857faf8 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -5395,14 +5395,6 @@ nsDocument::CreateElement(const nsAString& aTagName,
   }
 
   const nsString* is = nullptr;
-  if (aOptions.IsElementCreationOptions()) {
-    // Throw NotFoundError if 'is' is not-null and definition is null
-    is = CheckCustomElementName(aOptions.GetAsElementCreationOptions(),
-      needsLowercase ? lcTagName : aTagName, mDefaultElementType, rv);
-    if (rv.Failed()) {
-      return nullptr;
-    }
-  }
 
   RefPtr<Element> elem = CreateElem(
     needsLowercase ? lcTagName : aTagName, nullptr, mDefaultElementType, is);
@@ -5443,14 +5435,6 @@ nsDocument::CreateElementNS(const nsAString& aNamespaceURI,
   }
 
   const nsString* is = nullptr;
-  if (aOptions.IsElementCreationOptions()) {
-    // Throw NotFoundError if 'is' is not-null and definition is null
-    is = CheckCustomElementName(aOptions.GetAsElementCreationOptions(),
-                                aQualifiedName, nodeInfo->NamespaceID(), rv);
-    if (rv.Failed()) {
-      return nullptr;
-    }
-  }
 
   nsCOMPtr<Element> element;
   rv = NS_NewElement(getter_AddRefs(element), nodeInfo.forget(),
@@ -12757,30 +12741,6 @@ nsIDocument::UpdateStyleBackendType()
 #endif
 }
 
-const nsString*
-nsDocument::CheckCustomElementName(const ElementCreationOptions& aOptions,
-                                   const nsAString& aLocalName,
-                                   uint32_t aNamespaceID,
-                                   ErrorResult& rv)
-{
-  // only check aOptions if 'is' is passed and the webcomponents preference
-  // is enabled
-  if (!aOptions.mIs.WasPassed() ||
-      !CustomElementRegistry::IsCustomElementEnabled()) {
-      return nullptr;
-  }
-
-  const nsString* is = &aOptions.mIs.Value();
-
-  // Throw NotFoundError if 'is' is not-null and definition is null
-  if (!nsContentUtils::LookupCustomElementDefinition(this, aLocalName,
-                                                     aNamespaceID, is)) {
-      rv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
-  }
-
-  return is;
-}
-
 Selection*
 nsIDocument::GetSelection(ErrorResult& aRv)
 {
diff --git a/dom/base/nsDocument.h b/dom/base/nsDocument.h
index 8ea4993f0..90e511dcb 100644
--- a/dom/base/nsDocument.h
+++ b/dom/base/nsDocument.h
@@ -1388,20 +1388,6 @@ protected:
 private:
   static bool CustomElementConstructor(JSContext* aCx, unsigned aArgc, JS::Value* aVp);
 
-  /**
-   * Check if the passed custom element name, aOptions.mIs, is a registered
-   * custom element type or not, then return the custom element name for future
-   * usage.
-   *
-   * If there is no existing custom element definition for this name, throw a
-   * NotFoundError.
-   */
-  const nsString* CheckCustomElementName(
-    const mozilla::dom::ElementCreationOptions& aOptions,
-    const nsAString& aLocalName,
-    uint32_t aNamespaceID,
-    ErrorResult& rv);
-
 public:
   virtual already_AddRefed<mozilla::dom::CustomElementRegistry>
     GetCustomElementRegistry() override;
-- 
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