refactor: DebuggingRegistry to handle native highlights from React De…

…vTools (#41746) Summary: Changelog: [Internal] Now using previously added `highlightElements` and `clearElementsHighlights` commands. [Improvement] Since DebuggingRegistry is a singleton, it will only subscribe to the React DevTools events once and not *number-of-rendered-AppContainers* times. All required functionality for highlighting elements on a single AppContainer will be added in one of the next diffs of this stack, changes are incremental. Differential Revision: D51708053
facebook · Dec 6, 2023 · ba56187 · ba56187
1 parent 608d169
commit ba56187
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Showing 4 changed files with 67 additions and 53 deletions.
diff --git a/packages/react-native/Libraries/Debugging/DebuggingOverlay.js b/packages/react-native/Libraries/Debugging/DebuggingOverlay.js
@@ -8,7 +8,10 @@
  * @format
  */
 
-import type {Overlay} from './DebuggingOverlayNativeComponent';
+import type {
+  ElementRectangle,
+  Overlay,
+} from './DebuggingOverlayNativeComponent';
 
 import View from '../Components/View/View';
 import UIManager from '../ReactNative/UIManager';
@@ -24,6 +27,8 @@ const isNativeComponentReady =
 
 type DebuggingOverlayHandle = {
   highlightTraceUpdates(updates: Overlay[]): void,
+  highlightElements(elements: ElementRectangle[]): void,
+  clearElementsHighlight(): void,
 };
 
 function DebuggingOverlay(
@@ -49,6 +54,27 @@ function DebuggingOverlay(
           );
         }
       },
+      highlightElements(elements) {
+        if (!isNativeComponentReady) {
+          return;
+        }
+
+        if (nativeComponentRef.current != null) {
+          Commands.highlightElements(
+            nativeComponentRef.current,
+            JSON.stringify(elements),
+          );
+        }
+      },
+      clearElementsHighlight() {
+        if (!isNativeComponentReady) {
+          return;
+        }
+
+        if (nativeComponentRef.current != null) {
+          Commands.clearElementsHighlights(nativeComponentRef.current);
+        }
+      },
     }),
     [],
   );

diff --git a/packages/react-native/Libraries/Debugging/DebuggingOverlayNativeComponent.js b/packages/react-native/Libraries/Debugging/DebuggingOverlayNativeComponent.js
@@ -25,6 +25,13 @@ export type Overlay = {
   color: ?ProcessedColorValue,
 };
 
+export type ElementRectangle = {
+  x: number,
+  y: number,
+  width: number,
+  height: number,
+};
+
 interface NativeCommands {
   +draw: (
     viewRef: React.ElementRef<DebuggingOverlayNativeComponentType>,

diff --git a/packages/react-native/Libraries/Debugging/DebuggingRegistry.js b/packages/react-native/Libraries/Debugging/DebuggingRegistry.js
@@ -68,6 +68,8 @@ class DebuggingRegistry {
     this.#reactDevToolsAgent = agent;
 
     agent.addListener('drawTraceUpdates', this.#onDrawTraceUpdates);
+    agent.addListener('showNativeHighlight', this.#onHighlightElements);
+    agent.addListener('hideNativeHighlight', this.#onClearElementsHighlights);
   };
 
   #getPublicInstanceFromInstance(
@@ -131,6 +133,36 @@ class DebuggingRegistry {
       },
     );
   };
+
+  #onHighlightElements: (
+    ...ReactDevToolsAgentEvents['showNativeHighlight']
+  ) => void = node => {
+    // First clear highlights for every container
+    for (const subscriber of this.#registry) {
+      subscriber.debuggingOverlayRef.current?.clearElementsHighlight();
+    }
+
+    const publicInstance = this.#getPublicInstanceFromInstance(node);
+    if (publicInstance == null) {
+      return;
+    }
+
+    publicInstance.measure((x, y, width, height, left, top) => {
+      for (const subscriber of this.#registry) {
+        subscriber.debuggingOverlayRef.current?.highlightElements([
+          {x: left, y: top, width, height},
+        ]);
+      }
+    });
+  };
+
+  #onClearElementsHighlights: (
+    ...ReactDevToolsAgentEvents['hideNativeHighlight']
+  ) => void = () => {
+    for (const subscriber of this.#registry) {
+      subscriber.debuggingOverlayRef.current?.clearElementsHighlight();
+    }
+  };
 }
 
 const debuggingRegistryInstance: DebuggingRegistry = new DebuggingRegistry();

diff --git a/packages/react-native/Libraries/Inspector/ReactDevToolsOverlay.js b/packages/react-native/Libraries/Inspector/ReactDevToolsOverlay.js
@@ -11,10 +11,7 @@
 import type {InspectedViewRef} from '../ReactNative/AppContainer-dev';
 import type {PointerEvent} from '../Types/CoreEventTypes';
 import type {PressEvent} from '../Types/CoreEventTypes';
-import type {
-  InstanceFromReactDevTools,
-  ReactDevToolsAgent,
-} from '../Types/ReactDevToolsTypes';
+import type {ReactDevToolsAgent} from '../Types/ReactDevToolsTypes';
 import type {InspectedElement} from './Inspector';
 
 import View from '../Components/View/View';
@@ -42,47 +39,7 @@ export default function ReactDevToolsOverlay({
   const [isInspecting, setIsInspecting] = useState(false);
 
   useEffect(() => {
-    let hideTimeoutId = null;
-
-    function onAgentHideNativeHighlight() {
-      // we wait to actually hide in order to avoid flicker
-      clearTimeout(hideTimeoutId);
-      hideTimeoutId = setTimeout(() => {
-        setInspected(null);
-      }, 100);
-    }
-
-    function onAgentShowNativeHighlight(node?: InstanceFromReactDevTools) {
-      clearTimeout(hideTimeoutId);
-
-      // `canonical.publicInstance` => Fabric
-      // `canonical` => Legacy Fabric
-      // `node` => Legacy renderer
-      const component =
-        (node?.canonical && node.canonical.publicInstance) ??
-        // TODO: remove this check when syncing the new version of the renderer from React to React Native.
-        node?.canonical ??
-        node;
-      if (!component || !component.measure) {
-        return;
-      }
-
-      component.measure((x, y, width, height, left, top) => {
-        setInspected({
-          frame: {left, top, width, height},
-        });
-      });
-    }
-
     function cleanup() {
-      reactDevToolsAgent.removeListener(
-        'hideNativeHighlight',
-        onAgentHideNativeHighlight,
-      );
-      reactDevToolsAgent.removeListener(
-        'showNativeHighlight',
-        onAgentShowNativeHighlight,
-      );
       reactDevToolsAgent.removeListener('shutdown', cleanup);
       reactDevToolsAgent.removeListener(
         'startInspectingNative',
@@ -102,14 +59,6 @@ export default function ReactDevToolsOverlay({
       setIsInspecting(false);
     }
 
-    reactDevToolsAgent.addListener(
-      'hideNativeHighlight',
-      onAgentHideNativeHighlight,
-    );
-    reactDevToolsAgent.addListener(
-      'showNativeHighlight',
-      onAgentShowNativeHighlight,
-    );
     reactDevToolsAgent.addListener('shutdown', cleanup);
     reactDevToolsAgent.addListener(
       'startInspectingNative',