feat: use and initialize RDT Frontend in RDT panel (#23)

Author: hoxyq

front_end/panels/react_devtools/ReactDevToolsView.ts

@@ -3,30 +3,100 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import * as i18n from '../../core/i18n/i18n.js';
 import * as UI from '../../ui/legacy/legacy.js';
+import * as SDK from '../../core/sdk/sdk.js';
+import * as ReactDevTools from '../../third_party/react-devtools/react-devtools.js';
 
-let instance: ReactDevToolsViewImpl;
+import type * as ReactDevToolsTypes from '../../third_party/react-devtools/react-devtools.js';
+import type * as Common from '../../core/common/common.js';
 
-export class ReactDevToolsViewImpl extends UI.Widget.VBox {
-  static instance(): ReactDevToolsViewImpl {
-    if (!instance) {
-      instance = new ReactDevToolsViewImpl();
-    }
+import {Events, ReactDevToolsModel, type EventTypes} from './ReactDevToolsModel.js';
+
+const UIStrings = {
+  /**
+   *@description Title of the React DevTools view
+   */
+  title: 'React DevTools',
+};
+const str_ = i18n.i18n.registerUIStrings('panels/react_devtools/ReactDevToolsView.ts', UIStrings);
+const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);
+
+export class ReactDevToolsViewImpl extends UI.View.SimpleView {
+  private readonly wall: ReactDevToolsTypes.Wall;
+  private readonly bridge: ReactDevToolsTypes.Bridge;
+  private readonly store: ReactDevToolsTypes.Store;
+  private readonly listeners: Set<ReactDevToolsTypes.WallListener> = new Set();
+
+  constructor() {
+    super(i18nString(UIStrings.title));
+
+    this.wall = {
+      listen: (listener): Function => {
+        this.listeners.add(listener);
+
+        return (): void => {
+          this.listeners.delete(listener);
+        };
+      },
+      send: (event, payload): void => this.sendMessage(event, payload),
+    };
+
+    // To use the custom Wall we've created, we need to also create our own "Bridge" and "Store" objects.
+    this.bridge = ReactDevTools.createBridge(this.wall);
+    this.store = ReactDevTools.createStore(this.bridge);
+
+    SDK.TargetManager.TargetManager.instance().addModelListener(
+      ReactDevToolsModel,
+      Events.MessageReceived,
+      this.onMessage,
+      this,
+    );
 
-    return instance;
+    SDK.TargetManager.TargetManager.instance().addModelListener(
+      ReactDevToolsModel,
+      Events.Initialized,
+      this.initialize,
+      this,
+    );
+
+    const loaderContainer = document.createElement('div');
+    loaderContainer.setAttribute('style', 'display: flex; flex: 1; justify-content: center; align-items: center');
+
+    const loader = document.createElement('span');
+    loader.classList.add('spinner');
+
+    loaderContainer.appendChild(loader);
+    this.contentElement.appendChild(loaderContainer);
   }
 
-  private constructor() {
-    super(true, true);
+  private initialize(): void {
+    // Remove loader
+    this.contentElement.removeChildren();
+
+    const usingDarkTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
+
+    this.registerCSSFiles([ReactDevTools.CSS]);
+    ReactDevTools.initialize(this.contentElement, {
+      bridge: this.bridge,
+      store: this.store,
+      theme: usingDarkTheme ? 'dark' : 'light',
+    });
   }
 
-  override wasShown(): void {
-    super.wasShown();
+  private onMessage(event: Common.EventTarget.EventTargetEvent<EventTypes[Events.MessageReceived]>): void {
+    if (!event.data) {
+      return;
+    }
 
-    this.render();
+    for (const listener of this.listeners) {
+      listener(event.data);
+    }
   }
 
-  render(): void {
-    return;
+  private sendMessage(event: string, payload?: ReactDevToolsTypes.MessagePayload): void {
+    for (const model of SDK.TargetManager.TargetManager.instance().models(ReactDevToolsModel, {scoped: true})) {
+      void model.sendMessage({event, payload});
+    }
   }
 }

front_end/panels/react_devtools/react_devtools-meta.ts

@@ -46,7 +46,7 @@ UI.ViewManager.registerViewExtension({
       experiment: Root.Runtime.ExperimentName.ENABLE_REACT_DEVTOOLS_PANEL,
       condition: null,
     })) {
-      return Module.ReactDevToolsView.ReactDevToolsViewImpl.instance();
+      return new Module.ReactDevToolsView.ReactDevToolsViewImpl();
     }
 
     return Module.ReactDevToolsPlaceholder.ReactDevToolsPlaceholderImpl.instance();

scripts/build/generate_html_entrypoint.js

@@ -46,5 +46,21 @@ for (const entrypoint of entrypoints) {
     );
   }
 
+  // React DevTools uses Web Workers API for parsing hook names and uploading large tracing files
+  // https://github.com/facebook/react/blob/fd35655fae9f88284e01754cadb0707abaca795b/packages/react-devtools-shared/src/hooks/parseHookNames/loadSourceAndMetadata.js
+  // Here we update the CSP header to allow workers from self
+  if (entrypoint === 'rn_fusebox') {
+    const cspHeaderRegex = /(?<=<meta http-equiv="Content-Security-Policy" content=")(.*)(?=">)/;
+    const cspHeaderMatch = rewrittenTemplateContent.match(cspHeaderRegex);
+    if (cspHeaderMatch === null) {
+      throw new Error('Couldn\'t find CSP header for rn_fusebox entrypoint: this can break React DevTools panel');
+    }
+
+    rewrittenTemplateContent = rewrittenTemplateContent.replace(
+      cspHeaderRegex,
+      '$1; worker-src \'self\' blob:'
+    );
+  }
+
   writeIfChanged(path.join(outDirectory, `${entrypoint}.html`), rewrittenTemplateContent);
 }