Fabric: Removing `ShadowNode::operator==`

Summary:
@public
We don't need this anymore.
The same functionality is now implemented as `ShadowView::operator==` in much more reasonable way.

Reviewed By: sahrens

Differential Revision: D9649821

fbshipit-source-id: 8cd5f3cb4f583fd10d2d1e060aba914541341b5b

ReactCommon/fabric/components/view/ConcreteViewShadowNode.h

@@ -113,17 +113,6 @@ public:
     return clonedChildShadowNode.get();
   }
 
-#pragma mark - Equality
-
-  bool operator==(const ShadowNode& rhs) const override {
-    if (!ShadowNode::operator==(rhs)) {
-      return false;
-    }
-
-    const auto &other = static_cast<const ConcreteViewShadowNode&>(rhs);
-    return getLayoutMetrics() == other.getLayoutMetrics();
-  }
-
 #pragma mark - DebugStringConvertible
 
   SharedDebugStringConvertibleList getDebugProps() const override {

ReactCommon/fabric/core/shadownode/ShadowNode.cpp

@@ -143,23 +143,6 @@ void ShadowNode::cloneChildrenIfShared() {
   children_ = std::make_shared<SharedShadowNodeList>(*children_);
 }
 
-#pragma mark - Equality
-
-bool ShadowNode::operator==(const ShadowNode& rhs) const {
-  // Note: Child nodes are not considered as part of instance's value
-  // and/or identity.
-  return
-    tag_ == rhs.tag_ &&
-    rootTag_ == rhs.rootTag_ &&
-    props_ == rhs.props_ &&
-    eventEmitter_ == rhs.eventEmitter_ &&
-    localData_ == rhs.localData_;
-}
-
-bool ShadowNode::operator!=(const ShadowNode& rhs) const {
-  return !(*this == rhs);
-}
-
 #pragma mark - DebugStringConvertible
 
 std::string ShadowNode::getDebugName() const {

ReactCommon/fabric/core/shadownode/ShadowNode.h

@@ -101,18 +101,6 @@ public:
    */
   void setLocalData(const SharedLocalData &localData);
 
-#pragma mark - Equality
-
-  /*
-   * Equality operators.
-   * Use this to compare `ShadowNode`s values for equality (and non-equality).
-   * Same values indicates that nodes must not produce mutations
-   * during tree diffing process.
-   * Child nodes are not considered as part of the value.
-   */
-  virtual bool operator==(const ShadowNode& rhs) const;
-  virtual bool operator!=(const ShadowNode& rhs) const;
-
 #pragma mark - DebugStringConvertible
 
   std::string getDebugName() const override;

ReactCommon/fabric/core/tests/ShadowNodeTest.cpp

@@ -158,10 +158,10 @@ TEST(ShadowNodeTest, handleLocalData) {
   thirdNode->setLocalData(localDataOver9000);
 
   // LocalData object are compared by pointer, not by value.
-  ASSERT_EQ(*firstNode, *secondNode);
-  ASSERT_NE(*firstNode, *thirdNode);
+  ASSERT_EQ(firstNode->getLocalData(), secondNode->getLocalData());
+  ASSERT_NE(firstNode->getLocalData(), thirdNode->getLocalData());
   secondNode->setLocalData(anotherLocalData42);
-  ASSERT_NE(*firstNode, *secondNode);
+  ASSERT_NE(firstNode->getLocalData(), secondNode->getLocalData());
 
   // LocalData cannot be changed for sealed shadow node.
   secondNode->sealRecursive();

ReactCommon/fabric/uimanager/Differentiator.cpp

@@ -211,12 +211,15 @@ ShadowViewMutationList calculateShadowViewMutations(
 
   ShadowViewMutationList mutations;
 
-  if (oldRootShadowNode != newRootShadowNode) {
+  auto oldRootShadowView = ShadowView(oldRootShadowNode);
+  auto newRootShadowView = ShadowView(newRootShadowNode);
+
+  if (oldRootShadowView != newRootShadowView) {
     mutations.push_back(
       ShadowViewMutation::UpdateMutation(
         ShadowView(),
-        ShadowView(oldRootShadowNode),
-        ShadowView(newRootShadowNode),
+        oldRootShadowView,
+        newRootShadowView,
         -1
       )
     );