feat: add ReactDevToolsModel

config/gni/devtools_grd_files.gni

@@ -439,6 +439,8 @@ grd_files_release_sources = [
   "front_end/models/persistence/persistence-legacy.js",
   "front_end/models/persistence/persistence-meta.js",
   "front_end/models/persistence/persistence.js",
+  "front_end/models/react_native/ReactDevToolsBindingsModel.js",
+  "front_end/models/react_native/react_native.js",
   "front_end/models/source_map_scopes/source_map_scopes.js",
   "front_end/models/text_utils/text_utils-legacy.js",
   "front_end/models/text_utils/text_utils.js",
@@ -1394,6 +1396,7 @@ grd_files_debug_sources = [
   "front_end/panels/protocol_monitor/components/JSONEditor.css.js",
   "front_end/panels/protocol_monitor/components/JSONEditor.js",
   "front_end/panels/protocol_monitor/protocolMonitor.css.js",
+  "front_end/panels/react_devtools/ReactDevToolsModel.js",
   "front_end/panels/react_devtools/reactDevToolsPlaceholder.css.js",
   "front_end/panels/react_devtools/ReactDevToolsPlaceholder.js",
   "front_end/panels/react_devtools/ReactDevToolsView.js",

front_end/models/react_native/BUILD.gn

@@ -27,6 +27,7 @@ devtools_entrypoint("bundle") {
 
   visibility = [
     ":*",
+    "../../panels/react_devtools/*"
   ]
 
   visibility += devtools_models_visibility

front_end/models/react_native/ReactDevToolsBindingsModel.ts

@@ -13,6 +13,14 @@ type BindingCalledEventTargetEvent = Common.EventTarget.EventTargetEvent<SDK.Run
 
 const RUNTIME_GLOBAL = '__FUSEBOX_REACT_DEVTOOLS_DISPATCHER__';
 
+export const enum Events {
+  Initialized = 'Initialized',
+}
+
+export type EventTypes = {
+  [Events.Initialized]: void,
+};
+
 export class ReactDevToolsBindingsModel extends SDK.SDKModel.SDKModel {
   private readonly domainToListeners: Map<DomainName, Set<DomainMessageListener>> = new Map();
 
@@ -29,7 +37,11 @@ export class ReactDevToolsBindingsModel extends SDK.SDKModel.SDKModel {
     }
 
     runtimeModel.addEventListener(SDK.RuntimeModel.Events.BindingCalled, this.bindingCalled, this);
-    void this.enable(target);
+    void this.enable(target).then(() => this.onInitialization());
+  }
+
+  private onInitialization(): void {
+    this.dispatchEventToListeners(Events.Initialized);
   }
 
   private bindingCalled(event: BindingCalledEventTargetEvent): void {

front_end/panels/react_devtools/BUILD.gn

@@ -24,9 +24,10 @@ devtools_module("react_devtools_placeholder") {
 }
 
 devtools_module("react_devtools") {
-  sources = [ "ReactDevToolsView.ts" ]
+  sources = [ "ReactDevToolsView.ts", "ReactDevToolsModel.ts" ]
 
   deps = [
+    "../../models/react_native:bundle",
     "../../ui/legacy:bundle",
   ]
 }

front_end/panels/react_devtools/ReactDevToolsModel.ts

@@ -0,0 +1,68 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+// Copyright 2024 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import * as SDK from '../../core/sdk/sdk.js';
+import * as ReactNativeModels from '../../models/react_native/react_native.js';
+
+type JSONValue = null | string | number | boolean | {[key: string]: JSONValue} | JSONValue[];
+
+export const enum Events {
+  Initialized = 'Initialized',
+  MessageReceived = 'MessageReceived',
+}
+
+export type EventTypes = {
+  [Events.Initialized]: void,
+  [Events.MessageReceived]: JSONValue,
+};
+
+export class ReactDevToolsModel extends SDK.SDKModel.SDKModel<EventTypes> {
+  private static readonly FUSEBOX_BINDING_NAMESPACE = 'react-devtools';
+  private readonly rdtModel: ReactNativeModels.ReactDevToolsBindingsModel.ReactDevToolsBindingsModel | null;
+
+  constructor(target: SDK.Target.Target) {
+    super(target);
+
+    const model = target.model(ReactNativeModels.ReactDevToolsBindingsModel.ReactDevToolsBindingsModel);
+    if (!model) {
+      throw new Error('Failed to construct ReactDevToolsModel: ReactDevToolsBindingsModel was null');
+    }
+
+    this.rdtModel = model;
+    model.addEventListener(ReactNativeModels.ReactDevToolsBindingsModel.Events.Initialized, this.initialize, this);
+  }
+
+  private initialize(): void {
+    const rdtModel = this.rdtModel;
+    if (!rdtModel) {
+      throw new Error('Failed to initialize ReactDevToolsModel: ReactDevToolsBindingsModel was null');
+    }
+
+    rdtModel.subscribeToDomainMessages(
+      ReactDevToolsModel.FUSEBOX_BINDING_NAMESPACE,
+        message => this.onMessage(message),
+    );
+    void rdtModel.initializeDomain(ReactDevToolsModel.FUSEBOX_BINDING_NAMESPACE).then(() => this.onInitialization());
+  }
+
+  private onInitialization(): void {
+    this.dispatchEventToListeners(Events.Initialized);
+  }
+
+  async sendMessage(message: JSONValue): Promise<void> {
+    const rdtModel = this.rdtModel;
+    if (!rdtModel) {
+      throw new Error('Failed to send message from ReactDevToolsModel: ReactDevToolsBindingsModel was null');
+    }
+
+    await rdtModel.sendMessage(ReactDevToolsModel.FUSEBOX_BINDING_NAMESPACE, message);
+  }
+
+  onMessage(message: JSONValue): void {
+    this.dispatchEventToListeners(Events.MessageReceived, message);
+  }
+}
+
+SDK.SDKModel.SDKModel.register(ReactDevToolsModel, {capabilities: SDK.Target.Capability.JS, autostart: false});

front_end/panels/react_devtools/react_devtools.ts

@@ -5,5 +5,6 @@
 
 import * as ReactDevToolsView from './ReactDevToolsView.js';
 import * as ReactDevToolsPlaceholder from './ReactDevToolsPlaceholder.js';
+import * as ReactDevToolsModel from './ReactDevToolsModel.js';
 
-export {ReactDevToolsView, ReactDevToolsPlaceholder};
+export {ReactDevToolsView, ReactDevToolsPlaceholder, ReactDevToolsModel};