Fabric: A bunch of functions for converting JSI primitives to Fabric and vice-versa

Summary: We need to decouple this from actual JSI/UIManagerBinding implementation to make them more maintainable.

Reviewed By: sahrens

Differential Revision: D12876742

fbshipit-source-id: 30cad69d0a9761e2aa82f31d180e4b5a40cedb61

ReactCommon/fabric/uimanager/primitives.h

@@ -58,5 +58,65 @@ struct ShadowNodeListWrapper : public jsi::HostObject {
   SharedShadowNodeUnsharedList shadowNodeList;
 };
 
+inline static SharedShadowNode shadowNodeFromValue(
+    jsi::Runtime &runtime,
+    const jsi::Value &value) {
+  return value.getObject(runtime)
+      .getHostObject<ShadowNodeWrapper>(runtime)
+      ->shadowNode;
+}
+
+inline static jsi::Value valueFromShadowNode(
+    jsi::Runtime &runtime,
+    const SharedShadowNode &shadowNode) {
+  return jsi::Object::createFromHostObject(
+      runtime, std::make_shared<ShadowNodeWrapper>(shadowNode));
+}
+
+inline static SharedShadowNodeUnsharedList shadowNodeListFromValue(
+    jsi::Runtime &runtime,
+    const jsi::Value &value) {
+  return value.getObject(runtime)
+      .getHostObject<ShadowNodeListWrapper>(runtime)
+      ->shadowNodeList;
+}
+
+inline static jsi::Value valueFromShadowNodeList(
+    jsi::Runtime &runtime,
+    const SharedShadowNodeUnsharedList &shadowNodeList) {
+  return jsi::Object::createFromHostObject(
+      runtime, std::make_unique<ShadowNodeListWrapper>(shadowNodeList));
+}
+
+inline static RawProps rawPropsFromValue(
+    jsi::Runtime &runtime,
+    const jsi::Value &value) {
+  return rawPropsFromDynamic(folly::dynamic{
+      value.isNull() ? nullptr : jsi::dynamicFromValue(runtime, value)});
+}
+
+inline static SharedEventTarget eventTargetFromValue(
+    jsi::Runtime &runtime,
+    const jsi::Value &value) {
+  return std::make_shared<EventTargetWrapper>(
+      jsi::WeakObject(runtime, value.getObject(runtime)));
+}
+
+inline static Tag tagFromValue(jsi::Runtime &runtime, const jsi::Value &value) {
+  return (Tag)value.getNumber();
+}
+
+inline static SurfaceId surfaceIdFromValue(
+    jsi::Runtime &runtime,
+    const jsi::Value &value) {
+  return (SurfaceId)value.getNumber();
+}
+
+inline static ComponentName componentNameFromValue(
+    jsi::Runtime &runtime,
+    const jsi::Value &value) {
+  return value.getString(runtime).utf8(runtime);
+}
+
 } // namespace react
 } // namespace facebook