From 42331663e643b8366c4ec87a929161fa3fb8d775 Mon Sep 17 00:00:00 2001
From: Gaming4JC <g4jc@hyperbola.info>
Date: Sun, 5 Jan 2020 15:37:32 -0500
Subject: Bug 1392970 - Part 2: Get CustomElementDefinition from
 CustomElementData when possible.

Tag UXP Issue #1344
---
 dom/base/CustomElementRegistry.cpp | 65 +++++++++++++++-----------------------
 dom/base/nsContentUtils.cpp        |  7 +---
 2 files changed, 26 insertions(+), 46 deletions(-)

(limited to 'dom')

diff --git a/dom/base/CustomElementRegistry.cpp b/dom/base/CustomElementRegistry.cpp
index b752fdda7..1a4b5d45a 100644
--- a/dom/base/CustomElementRegistry.cpp
+++ b/dom/base/CustomElementRegistry.cpp
@@ -36,8 +36,19 @@ CustomElementCallback::Call()
       // enqueue attached callback for ELEMENT.
       nsIDocument* document = mThisObject->GetComposedDoc();
       if (document && document->GetDocShell()) {
+        NodeInfo* ni = mThisObject->NodeInfo();
+        nsDependentAtomString extType(mOwnerData->mType);
+
+        // We need to do this because at this point, CustomElementDefinition is
+        // not set to CustomElementData yet, so EnqueueLifecycleCallback will
+        // fail to find the CE definition for this custom element.
+        // This will go away eventually since there is no created callback in v1.
+        CustomElementDefinition* definition =
+          nsContentUtils::LookupCustomElementDefinition(document,
+            ni->LocalName(), ni->NamespaceID(),
+            extType.IsEmpty() ? nullptr : &extType);
         nsContentUtils::EnqueueLifecycleCallback(
-          document, nsIDocument::eAttached, mThisObject);
+          document, nsIDocument::eAttached, mThisObject, nullptr, definition);
       }
 
       static_cast<LifecycleCreatedCallback *>(mCallback.get())->Call(mThisObject, rv);
@@ -324,51 +335,35 @@ CustomElementRegistry::CreateCustomElementCallback(
   nsIDocument::ElementCallbackType aType, Element* aCustomElement,
   LifecycleCallbackArgs* aArgs, CustomElementDefinition* aDefinition)
 {
+  MOZ_ASSERT(aDefinition, "CustomElementDefinition should not be null");
+
   RefPtr<CustomElementData> elementData = aCustomElement->GetCustomElementData();
   MOZ_ASSERT(elementData, "CustomElementData should exist");
 
-  // Let DEFINITION be ELEMENT's definition
-  CustomElementDefinition* definition = aDefinition;
-  if (!definition) {
-    mozilla::dom::NodeInfo* info = aCustomElement->NodeInfo();
-
-    // Make sure we get the correct definition in case the element
-    // is a extended custom element e.g. <button is="x-button">.
-    nsCOMPtr<nsIAtom> typeAtom = elementData ?
-      elementData->mType.get() : info->NameAtom();
-
-    definition = mCustomDefinitions.GetWeak(typeAtom);
-    if (!definition || definition->mLocalName != info->NameAtom()) {
-      // Trying to enqueue a callback for an element that is not
-      // a custom element. We are done, nothing to do.
-      return nullptr;
-    }
-  }
-
   // Let CALLBACK be the callback associated with the key NAME in CALLBACKS.
   CallbackFunction* func = nullptr;
   switch (aType) {
     case nsIDocument::eCreated:
-      if (definition->mCallbacks->mCreatedCallback.WasPassed()) {
-        func = definition->mCallbacks->mCreatedCallback.Value();
+      if (aDefinition->mCallbacks->mCreatedCallback.WasPassed()) {
+        func = aDefinition->mCallbacks->mCreatedCallback.Value();
       }
       break;
 
     case nsIDocument::eAttached:
-      if (definition->mCallbacks->mAttachedCallback.WasPassed()) {
-        func = definition->mCallbacks->mAttachedCallback.Value();
+      if (aDefinition->mCallbacks->mAttachedCallback.WasPassed()) {
+        func = aDefinition->mCallbacks->mAttachedCallback.Value();
       }
       break;
 
     case nsIDocument::eDetached:
-      if (definition->mCallbacks->mDetachedCallback.WasPassed()) {
-        func = definition->mCallbacks->mDetachedCallback.Value();
+      if (aDefinition->mCallbacks->mDetachedCallback.WasPassed()) {
+        func = aDefinition->mCallbacks->mDetachedCallback.Value();
       }
       break;
 
     case nsIDocument::eAttributeChanged:
-      if (definition->mCallbacks->mAttributeChangedCallback.WasPassed()) {
-        func = definition->mCallbacks->mAttributeChangedCallback.Value();
+      if (aDefinition->mCallbacks->mAttributeChangedCallback.WasPassed()) {
+        func = aDefinition->mCallbacks->mAttributeChangedCallback.Value();
       }
       break;
   }
@@ -403,21 +398,11 @@ CustomElementRegistry::EnqueueLifecycleCallback(nsIDocument::ElementCallbackType
                                                 LifecycleCallbackArgs* aArgs,
                                                 CustomElementDefinition* aDefinition)
 {
-  RefPtr<CustomElementData> elementData = aCustomElement->GetCustomElementData();
-  MOZ_ASSERT(elementData, "CustomElementData should exist");
-
-  // Let DEFINITION be ELEMENT's definition
   CustomElementDefinition* definition = aDefinition;
   if (!definition) {
-    mozilla::dom::NodeInfo* info = aCustomElement->NodeInfo();
-
-    // Make sure we get the correct definition in case the element
-    // is a extended custom element e.g. <button is="x-button">.
-    nsCOMPtr<nsIAtom> typeAtom = elementData ?
-      elementData->mType.get() : info->NameAtom();
-
-    definition = mCustomDefinitions.GetWeak(typeAtom);
-    if (!definition || definition->mLocalName != info->NameAtom()) {
+    definition = aCustomElement->GetCustomElementDefinition();
+    if (!definition ||
+        definition->mLocalName != aCustomElement->NodeInfo()->NameAtom()) {
       return;
     }
   }
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index f8964d198..b029f9793 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -9642,13 +9642,8 @@ nsContentUtils::GetElementDefinitionIfObservingAttr(Element* aCustomElement,
                                                     nsIAtom* aExtensionType,
                                                     nsIAtom* aAttrName)
 {
-  nsString extType = nsDependentAtomString(aExtensionType);
-  NodeInfo *ni = aCustomElement->NodeInfo();
-
   CustomElementDefinition* definition =
-    LookupCustomElementDefinition(aCustomElement->OwnerDoc(), ni->LocalName(),
-                                  ni->NamespaceID(),
-                                  extType.IsEmpty() ? nullptr : &extType);
+    aCustomElement->GetCustomElementDefinition();
 
   // Custom element not defined yet or attribute is not in the observed
   // attribute list.
-- 
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