From 93313b0ce3aada87f76948e6c65d455ee4998acf Mon Sep 17 00:00:00 2001
From: Gaming4JC <g4jc@hyperbola.info>
Date: Sun, 19 Jan 2020 23:33:52 -0500
Subject: Bug 1406325 - Part 5: Implement try to upgrade.

Tag UXP Issue #1344
---
 dom/base/nsContentUtils.cpp | 62 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

(limited to 'dom/base/nsContentUtils.cpp')

diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 8c157a8ee..87c879746 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -227,6 +227,7 @@ extern "C" int MOZ_XMLCheckQName(const char* ptr, const char* end,
                                  int ns_aware, const char** colon);
 
 class imgLoader;
+class nsIAtom;
 
 using namespace mozilla::dom;
 using namespace mozilla::ipc;
@@ -9575,6 +9576,27 @@ nsContentUtils::HttpsStateIsModern(nsIDocument* aDocument)
   return false;
 }
 
+/* static */ void
+nsContentUtils::TryToUpgradeElement(Element* aElement)
+{
+  NodeInfo* nodeInfo = aElement->NodeInfo();
+  RefPtr<nsIAtom> typeAtom =
+    aElement->GetCustomElementData()->GetCustomElementType();
+  CustomElementDefinition* definition =
+    nsContentUtils::LookupCustomElementDefinition(nodeInfo->GetDocument(),
+                                                  nodeInfo->LocalName(),
+                                                  nodeInfo->NamespaceID(),
+                                                  typeAtom);
+  if (definition) {
+    nsContentUtils::EnqueueUpgradeReaction(aElement, definition);
+  } else {
+    // Add an unresolved custom element that is a candidate for
+    // upgrade when a custom element is connected to the document.
+    // We will make sure it's shadow-including tree order in bug 1326028.
+    nsContentUtils::RegisterUnresolvedElement(aElement, typeAtom);
+  }
+}
+
 /* static */ CustomElementDefinition*
 nsContentUtils::LookupCustomElementDefinition(nsIDocument* aDoc,
                                               const nsAString& aLocalName,
@@ -9604,6 +9626,46 @@ nsContentUtils::LookupCustomElementDefinition(nsIDocument* aDoc,
   return registry->LookupCustomElementDefinition(aLocalName, aTypeAtom);
 }
 
+/* static */ void
+nsContentUtils::RegisterUnresolvedElement(Element* aElement, nsIAtom* aTypeName)
+{
+  MOZ_ASSERT(aElement);
+
+  nsIDocument* doc = aElement->OwnerDoc();
+  nsPIDOMWindowInner* window(doc->GetInnerWindow());
+  if (!window) {
+    return;
+  }
+
+  RefPtr<CustomElementRegistry> registry(window->CustomElements());
+  if (!registry) {
+    return;
+  }
+
+  registry->RegisterUnresolvedElement(aElement, aTypeName);
+}
+
+/* static */ void
+nsContentUtils::UnregisterUnresolvedElement(Element* aElement)
+{
+  MOZ_ASSERT(aElement);
+
+  RefPtr<nsIAtom> typeAtom =
+    aElement->GetCustomElementData()->GetCustomElementType();
+  nsIDocument* doc = aElement->OwnerDoc();
+  nsPIDOMWindowInner* window(doc->GetInnerWindow());
+  if (!window) {
+    return;
+  }
+
+  RefPtr<CustomElementRegistry> registry(window->CustomElements());
+  if (!registry) {
+    return;
+  }
+
+  registry->UnregisterUnresolvedElement(aElement, typeAtom);
+}
+
 /* static */ CustomElementDefinition*
 nsContentUtils::GetElementDefinitionIfObservingAttr(Element* aCustomElement,
                                                     nsIAtom* aExtensionType,
-- 
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