Replay capture phase for continuous events

packages/react-dom/src/events/DOMPluginEventSystem.js

@@ -70,6 +70,7 @@ import * as ChangeEventPlugin from './plugins/ChangeEventPlugin';
 import * as EnterLeaveEventPlugin from './plugins/EnterLeaveEventPlugin';
 import * as SelectEventPlugin from './plugins/SelectEventPlugin';
 import * as SimpleEventPlugin from './plugins/SimpleEventPlugin';
+import {isReplayingEvent} from './replayedEvent';
 
 type DispatchListener = {|
   instance: null | Fiber,
@@ -557,7 +558,8 @@ export function dispatchEventForPluginEventSystem(
       // for legacy FB support, where the expected behavior was to
       // match React < 16 behavior of delegated clicks to the doc.
       domEventName === 'click' &&
-      (eventSystemFlags & SHOULD_NOT_DEFER_CLICK_FOR_FB_SUPPORT_MODE) === 0
+      (eventSystemFlags & SHOULD_NOT_DEFER_CLICK_FOR_FB_SUPPORT_MODE) === 0 &&
+      !isReplayingEvent(nativeEvent)
     ) {
       deferClickToDocumentForLegacyFBSupport(domEventName, targetContainer);
       return;

packages/react-dom/src/events/EventSystemFlags.js

@@ -13,11 +13,10 @@ export const IS_EVENT_HANDLE_NON_MANAGED_NODE = 1;
 export const IS_NON_DELEGATED = 1 << 1;
 export const IS_CAPTURE_PHASE = 1 << 2;
 export const IS_PASSIVE = 1 << 3;
-export const IS_REPLAYED = 1 << 4;
-export const IS_LEGACY_FB_SUPPORT_MODE = 1 << 5;
+export const IS_LEGACY_FB_SUPPORT_MODE = 1 << 4;
 
 export const SHOULD_NOT_DEFER_CLICK_FOR_FB_SUPPORT_MODE =
-  IS_LEGACY_FB_SUPPORT_MODE | IS_REPLAYED | IS_CAPTURE_PHASE;
+  IS_LEGACY_FB_SUPPORT_MODE | IS_CAPTURE_PHASE;
 
 // We do not want to defer if the event system has already been
 // set to LEGACY_FB_SUPPORT. LEGACY_FB_SUPPORT only gets set when

packages/react-dom/src/events/ReactDOMEventListener.js

@@ -155,13 +155,128 @@ export function dispatchEvent(
     return;
   }
 
+  if (enableCapturePhaseSelectiveHydrationWithoutDiscreteEventReplay) {
+    dispatchEventWithEnableCapturePhaseSelectiveHydrationWithoutDiscreteEventReplay(
+      domEventName,
+      eventSystemFlags,
+      targetContainer,
+      nativeEvent,
+    );
+  } else {
+    dispatchEventOriginal(
+      domEventName,
+      eventSystemFlags,
+      targetContainer,
+      nativeEvent,
+    );
+  }
+}
+
+function dispatchEventWithEnableCapturePhaseSelectiveHydrationWithoutDiscreteEventReplay(
+  domEventName: DOMEventName,
+  eventSystemFlags: EventSystemFlags,
+  targetContainer: EventTarget,
+  nativeEvent: AnyNativeEvent,
+) {
+  let blockedOn = findInstanceBlockingEvent(
+    domEventName,
+    eventSystemFlags,
+    targetContainer,
+    nativeEvent,
+  );
+
+  // We can dispatch the event now
+  // Intentional double equals, either null or undefined
+  if (blockedOn == null) {
+    clearIfContinuousEvent(domEventName, nativeEvent);
+    dispatchEventForPluginEventSystem(
+      domEventName,
+      eventSystemFlags,
+      nativeEvent,
+      blockedOn === null
+        ? getClosestInstanceFromNode(getEventTarget(nativeEvent))
+        : null,
+      targetContainer,
+    );
+    return;
+  }
+
+  if (
+    queueIfContinuousEvent(
+      blockedOn,
+      domEventName,
+      eventSystemFlags,
+      targetContainer,
+      nativeEvent,
+    )
+  ) {
+    nativeEvent.stopPropagation();
+    return;
+  }
+  // We need to clear only if we didn't queue because
+  // queueing is accumulative.
+  clearIfContinuousEvent(domEventName, nativeEvent);
+
+  if (
+    eventSystemFlags & IS_CAPTURE_PHASE &&
+    isDiscreteEventThatRequiresHydration(domEventName)
+  ) {
+    // Intentionally not strict equal. Could be `null` or `undefined`
+    while (blockedOn != null) {
+      const fiber = getInstanceFromNode(blockedOn);
+      if (fiber !== null) {
+        attemptSynchronousHydration(fiber);
+      }
+      const nextBlockedOn = findInstanceBlockingEvent(
+        domEventName,
+        eventSystemFlags,
+        targetContainer,
+        nativeEvent,
+      );
+      if (nextBlockedOn === blockedOn) {
+        break;
+      }
+      blockedOn = nextBlockedOn;
+    }
+    if (blockedOn) {
+      nativeEvent.stopPropagation();
+      return;
+    }
+    dispatchEventForPluginEventSystem(
+      domEventName,
+      eventSystemFlags,
+      nativeEvent,
+      blockedOn === null
+        ? getClosestInstanceFromNode(getEventTarget(nativeEvent))
+        : null,
+      targetContainer,
+    );
+    return;
+  }
+
+  // This is not replayable so we'll invoke it but without a target,
+  // in case the event system needs to trace it.
+  dispatchEventForPluginEventSystem(
+    domEventName,
+    eventSystemFlags,
+    nativeEvent,
+    null,
+    targetContainer,
+  );
+}
+
+function dispatchEventOriginal(
+  domEventName: DOMEventName,
+  eventSystemFlags: EventSystemFlags,
+  targetContainer: EventTarget,
+  nativeEvent: AnyNativeEvent,
+) {
   // TODO: replaying capture phase events is currently broken
   // because we used to do it during top-level native bubble handlers
   // but now we use different bubble and capture handlers.
   // In eager mode, we attach capture listeners early, so we need
   // to filter them out until we fix the logic to handle them correctly.
   const allowReplay = (eventSystemFlags & IS_CAPTURE_PHASE) === 0;
-
   if (
     allowReplay &&
     hasQueuedDiscreteEvents() &&
@@ -180,14 +295,22 @@ export function dispatchEvent(
     return;
   }
 
-  let blockedOn = attemptToDispatchEvent(
+  const blockedOn = findInstanceBlockingEvent(
     domEventName,
     eventSystemFlags,
     targetContainer,
     nativeEvent,
   );
-
-  if (blockedOn === null) {
+  if (blockedOn == null) {
+    dispatchEventForPluginEventSystem(
+      domEventName,
+      eventSystemFlags,
+      nativeEvent,
+      blockedOn === null
+        ? getClosestInstanceFromNode(getEventTarget(nativeEvent))
+        : null,
+      targetContainer,
+    );
     // We successfully dispatched this event.
     if (allowReplay) {
       clearIfContinuousEvent(domEventName, nativeEvent);
@@ -196,10 +319,7 @@ export function dispatchEvent(
   }
 
   if (allowReplay) {
-    if (
-      !enableCapturePhaseSelectiveHydrationWithoutDiscreteEventReplay &&
-      isDiscreteEventThatRequiresHydration(domEventName)
-    ) {
+    if (isDiscreteEventThatRequiresHydration(domEventName)) {
       // This this to be replayed later once the target is available.
       queueDiscreteEvent(
         blockedOn,
@@ -226,33 +346,6 @@ export function dispatchEvent(
     clearIfContinuousEvent(domEventName, nativeEvent);
   }
 
-  if (
-    enableCapturePhaseSelectiveHydrationWithoutDiscreteEventReplay &&
-    eventSystemFlags & IS_CAPTURE_PHASE &&
-    isDiscreteEventThatRequiresHydration(domEventName)
-  ) {
-    while (blockedOn !== null) {
-      const fiber = getInstanceFromNode(blockedOn);
-      if (fiber !== null) {
-        attemptSynchronousHydration(fiber);
-      }
-      const nextBlockedOn = attemptToDispatchEvent(
-        domEventName,
-        eventSystemFlags,
-        targetContainer,
-        nativeEvent,
-      );
-      if (nextBlockedOn === blockedOn) {
-        break;
-      }
-      blockedOn = nextBlockedOn;
-    }
-    if (blockedOn) {
-      nativeEvent.stopPropagation();
-      return;
-    }
-  }
-
   // This is not replayable so we'll invoke it but without a target,
   // in case the event system needs to trace it.
   dispatchEventForPluginEventSystem(
@@ -264,24 +357,23 @@ export function dispatchEvent(
   );
 }
 
-// Attempt dispatching an event. Returns a SuspenseInstance or Container if it's blocked.
-export function attemptToDispatchEvent(
+// Returns a SuspenseInstance or Container if it's blocked.
+// Returns null if not blocked and we should use closestInstance
+// Returns undefined if not blocked but we should dispatch without a targetInst
+export function findInstanceBlockingEvent(
   domEventName: DOMEventName,
   eventSystemFlags: EventSystemFlags,
   targetContainer: EventTarget,
   nativeEvent: AnyNativeEvent,
-): null | Container | SuspenseInstance {
+): typeof undefined | null | Container | SuspenseInstance {
   // TODO: Warn if _enabled is false.
 
   const nativeEventTarget = getEventTarget(nativeEvent);
-  let targetInst = getClosestInstanceFromNode(nativeEventTarget);
+  const targetInst = getClosestInstanceFromNode(nativeEventTarget);
 
   if (targetInst !== null) {
     const nearestMounted = getNearestMountedFiber(targetInst);
-    if (nearestMounted === null) {
-      // This tree has been unmounted already. Dispatch without a target.
-      targetInst = null;
-    } else {
+    if (nearestMounted !== null) {
       const tag = nearestMounted.tag;
       if (tag === SuspenseComponent) {
         const instance = getSuspenseInstanceFromFiber(nearestMounted);
@@ -295,31 +387,26 @@ export function attemptToDispatchEvent(
         // This shouldn't happen, something went wrong but to avoid blocking
         // the whole system, dispatch the event without a target.
         // TODO: Warn.
-        targetInst = null;
+        return undefined;
       } else if (tag === HostRoot) {
         const root: FiberRoot = nearestMounted.stateNode;
         if (root.isDehydrated) {
           // If this happens during a replay something went wrong and it might block
           // the whole system.
           return getContainerFromFiber(nearestMounted);
         }
-        targetInst = null;
       } else if (nearestMounted !== targetInst) {
         // If we get an event (ex: img onload) before committing that
         // component's mount, ignore it for now (that is, treat it as if it was an
         // event on a non-React tree). We might also consider queueing events and
         // dispatching them after the mount.
-        targetInst = null;
+        return undefined;
       }
+    } else {
+      // This tree has been unmounted already. Dispatch without a target.
+      return undefined;
     }
   }
-  dispatchEventForPluginEventSystem(
-    domEventName,
-    eventSystemFlags,
-    nativeEvent,
-    targetInst,
-    targetContainer,
-  );
   // We're not blocked on anything.
   return null;
 }