API to report events

Summary:
Extends the WebPerformance API with ability to report events, [according to the standard](https://www.w3.org/TR/event-timing/#sec-performance-event-timing).

This is an API-only change, the actual reporting comes in a separate diff, to simplify reviewing.

Changelog: [Internal]

Reviewed By: christophpurrer

Differential Revision: D42097695

fbshipit-source-id: d8b468ffed50c1c3d889151df5e8ca644d6e1a68

Libraries/WebPerformance/NativePerformanceObserver.cpp

@@ -17,6 +17,10 @@ static PerformanceEntryType stringToPerformanceEntryType(
     return PerformanceEntryType::MARK;
   } else if (entryType == "measure") {
     return PerformanceEntryType::MEASURE;
+  } else if (entryType == "event") {
+    return PerformanceEntryType::EVENT;
+  } else if (entryType == "first-input") {
+    return PerformanceEntryType::FIRST_INPUT;
   } else {
     return PerformanceEntryType::UNDEFINED;
   }

Libraries/WebPerformance/NativePerformanceObserver.h

@@ -26,7 +26,7 @@ using RawPerformanceEntry = NativePerformanceObserverCxxBaseRawPerformanceEntry<
     // For "event" entries only:
     std::optional<double>,
     std::optional<double>,
-    std::optional<double>>;
+    std::optional<uint32_t>>;
 
 template <>
 struct Bridging<RawPerformanceEntry>
@@ -37,7 +37,7 @@ struct Bridging<RawPerformanceEntry>
           double,
           std::optional<double>,
           std::optional<double>,
-          std::optional<double>> {};
+          std::optional<uint32_t>> {};
 
 using GetPendingEntriesResult =
     NativePerformanceObserverCxxBaseGetPendingEntriesResult<

Libraries/WebPerformance/NativePerformanceObserver.js

@@ -16,6 +16,8 @@ export const RawPerformanceEntryTypeValues = {
   UNDEFINED: 0,
   MARK: 1,
   MEASURE: 2,
+  EVENT: 3,
+  FIRST_INPUT: 4,
 };
 
 export type RawPerformanceEntryType = number;

Libraries/WebPerformance/PerformanceEntryReporter.cpp

@@ -167,6 +167,26 @@ double PerformanceEntryReporter::getMarkTime(
   }
 }
 
+void PerformanceEntryReporter::event(
+    const std::string &name,
+    double startTime,
+    double duration,
+    bool isFirstInput,
+    double processingStart,
+    double processingEnd,
+    uint32_t interactionId) {
+  logEntry(
+      {name,
+       static_cast<int>(
+           isFirstInput ? PerformanceEntryType::FIRST_INPUT
+                        : PerformanceEntryType::MEASURE),
+       startTime,
+       duration,
+       processingStart,
+       processingEnd,
+       interactionId});
+}
+
 void PerformanceEntryReporter::clearEntries(
     std::function<bool(const RawPerformanceEntry &)> predicate) {
   int lastPos = entries_.size() - 1;

Libraries/WebPerformance/PerformanceEntryReporter.h

@@ -45,7 +45,9 @@ enum class PerformanceEntryType {
   UNDEFINED = 0,
   MARK = 1,
   MEASURE = 2,
-  _COUNT = 3,
+  EVENT = 3,
+  FIRST_INPUT = 4,
+  _COUNT = 5,
 };
 
 class PerformanceEntryReporter {
@@ -88,6 +90,15 @@ class PerformanceEntryReporter {
       const std::optional<std::string> &endMark);
   void clearMeasures(const std::optional<std::string> &measureName);
 
+  void event(
+      const std::string &name,
+      double startTime,
+      double duration,
+      bool isFirstInput,
+      double processingStart,
+      double processingEnd,
+      uint32_t interactionId);
+
  private:
   PerformanceEntryReporter() {}
 

Libraries/WebPerformance/PerformanceObserver.js

@@ -19,7 +19,7 @@ import NativePerformanceObserver, {
 } from './NativePerformanceObserver';
 
 export type HighResTimeStamp = number;
-export type PerformanceEntryType = 'mark' | 'measure';
+export type PerformanceEntryType = 'mark' | 'measure' | 'event' | 'first-input';
 
 export class PerformanceEntry {
   name: string;
@@ -62,6 +62,10 @@ function rawToPerformanceEntryType(
       return 'mark';
     case RawPerformanceEntryTypeValues.MEASURE:
       return 'measure';
+    case RawPerformanceEntryTypeValues.EVENT:
+      return 'event';
+    case RawPerformanceEntryTypeValues.FIRST_INPUT:
+      return 'first-input';
     default:
       throw new TypeError(
         `unexpected performance entry type received: ${type}`,
@@ -311,7 +315,7 @@ export default class PerformanceObserver {
   }
 
   static supportedEntryTypes: $ReadOnlyArray<PerformanceEntryType> =
-    Object.freeze(['mark', 'measure']);
+    Object.freeze(['mark', 'measure', 'event', 'first-input']);
 }
 
 function union<T>(a: $ReadOnlySet<T>, b: $ReadOnlySet<T>): Set<T> {