Create Welcome panel in rn_inspector

config/gni/devtools_grd_files.gni

@@ -177,6 +177,7 @@ grd_files_release_sources = [
   "front_end/Images/popup.svg",
   "front_end/Images/preview_feature_video_thumbnail.svg",
   "front_end/Images/profile.svg",
+  "front_end/Images/react_native/welcomeIcon.png",
   "front_end/Images/record-start.svg",
   "front_end/Images/record-stop.svg",
   "front_end/Images/redo.svg",
@@ -537,6 +538,10 @@ grd_files_release_sources = [
   "front_end/panels/recorder/recorder-meta.js",
   "front_end/panels/recorder/recorder.js",
   "front_end/panels/recorder/util/util.js",
+  "front_end/panels/rn_welcome/rn_welcome-meta.js",
+  "front_end/panels/rn_welcome/RNWelcome.js",
+  "front_end/panels/rn_welcome/rn_welcome.js",
+  "front_end/panels/rn_welcome/rnWelcome.css.js",
   "front_end/panels/screencast/screencast-meta.js",
   "front_end/panels/screencast/screencast.js",
   "front_end/panels/search/search-legacy.js",

config/gni/devtools_image_files.gni

@@ -15,6 +15,7 @@ devtools_image_files = [
   "navigationControls.png",
   "nodeIcon.avif",
   "popoverArrows.png",
+  "react_native/welcomeIcon.png",
   "toolbarResizerVertical.png",
   "touchCursor_2x.png",
   "touchCursor.png",

front_end/core/root/Runtime.ts

@@ -314,6 +314,7 @@ export enum ExperimentName {
   HIGHLIGHT_ERRORS_ELEMENTS_PANEL = 'highlightErrorsElementsPanel',
   SET_ALL_BREAKPOINTS_EAGERLY = 'setAllBreakpointsEagerly',
   SELF_XSS_WARNING = 'selfXssWarning',
+  REACT_NATIVE_SPECIFIC_UI = 'reactNativeSpecificUI',
 }
 
 // TODO(crbug.com/1167717): Make this a const enum again

front_end/entrypoints/rn_inspector/BUILD.gn

@@ -26,6 +26,7 @@ devtools_entrypoint("entrypoint") {
     "../../panels/network:meta",
     "../../panels/performance_monitor:meta",
     "../../panels/recorder:meta",
+    "../../panels/rn_welcome:meta",
     "../../panels/security:meta",
     "../../panels/sensors:meta",
     "../../panels/timeline:meta",

front_end/entrypoints/rn_inspector/rn_inspector.ts

@@ -10,10 +10,21 @@ import '../inspector_main/inspector_main-meta.js';
 import '../../panels/issues/issues-meta.js';
 import '../../panels/mobile_throttling/mobile_throttling-meta.js';
 import '../../panels/timeline/timeline-meta.js';
+import '../../panels/rn_welcome/rn_welcome-meta.js';
 
 import * as Root from '../../core/root/root.js';
 import * as Main from '../main/main.js';
 
+Root.Runtime.experiments.register(
+  Root.Runtime.ExperimentName.REACT_NATIVE_SPECIFIC_UI,
+  'Show React Native-specific UI',
+  /* unstable */ false,
+);
+
+Root.Runtime.experiments.enableExperimentsByDefault(
+  [Root.Runtime.ExperimentName.REACT_NATIVE_SPECIFIC_UI],
+);
+
 // @ts-ignore Exposed for legacy layout tests
 self.runtime = Root.Runtime.Runtime.instance({forceNew: true});
 new Main.MainImpl.MainImpl();

front_end/panels/rn_welcome/BUILD.gn

@@ -0,0 +1,54 @@
+# Copyright 2020 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("../../../scripts/build/ninja/devtools_entrypoint.gni")
+import("../../../scripts/build/ninja/devtools_module.gni")
+import("../../../scripts/build/ninja/generate_css.gni")
+import("../visibility.gni")
+
+generate_css("css_files") {
+  sources = [ "rnWelcome.css" ]
+}
+
+devtools_module("rn_welcome") {
+  sources = [ "RNWelcome.ts" ]
+
+  deps = [
+    "../../core/host:bundle",
+    "../../core/i18n:bundle",
+    "../../core/protocol_client:bundle",
+    "../../core/sdk:bundle",
+    "../../models/text_utils:bundle",
+    "../../ui/components/data_grid:bundle",
+    "../../ui/components/icon_button:bundle",
+    "../../ui/legacy:bundle",
+    "../../ui/lit-html:bundle",
+  ]
+}
+
+devtools_entrypoint("bundle") {
+  entrypoint = "rn_welcome.ts"
+
+  deps = [
+    ":css_files",
+    ":rn_welcome",
+  ]
+
+  visibility = [
+    ":*",
+    "../../../test/unittests/front_end/entrypoints/missing_entrypoints/*",
+    # "../../../test/unittests/front_end/panels/rn_welcome/*",
+    "../../entrypoints/*",
+  ]
+
+  visibility += devtools_panels_visibility
+}
+
+devtools_entrypoint("meta") {
+  entrypoint = "rn_welcome-meta.ts"
+
+  deps = [ ":bundle" ]
+
+  visibility = [ "../../entrypoints/*" ]
+}

front_end/panels/rn_welcome/RNWelcome.ts

@@ -0,0 +1,71 @@
+// Copyright 2018 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 UI from '../../ui/legacy/legacy.js';
+import * as i18n from '../../core/i18n/i18n.js';
+
+import rnWelcomeStyles from './rnWelcome.css.js';
+import * as LitHtml from '../../ui/lit-html/lit-html.js';
+
+const UIStrings = {
+  /** @description The name of the debugging product */
+  debuggerBrandName: 'Chrome DevTools for React Native',
+  /** @description Welcome text */
+  welcomeMessage: 'Welcome to debugging in React Native',
+  /** @description "Debugging docs" link */
+  docsLabel: 'Debugging docs',
+  /** @description "What's new" link */
+  whatsNewLabel: "What's new",
+};
+const {render, html} = LitHtml;
+
+const str_ = i18n.i18n.registerUIStrings('panels/rn_welcome/RNWelcome.ts', UIStrings);
+const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);
+
+let rnWelcomeImplInstance: RNWelcomeImpl;
+
+export class RNWelcomeImpl extends UI.Widget.VBox {
+  static instance(opts: {forceNew: null|boolean} = {forceNew: null}): RNWelcomeImpl {
+    const {forceNew} = opts;
+    if (!rnWelcomeImplInstance || forceNew) {
+      rnWelcomeImplInstance = new RNWelcomeImpl();
+    }
+    return rnWelcomeImplInstance;
+  }
+
+  private constructor() {
+    super(true, true);
+  }
+
+  override wasShown(): void {
+    super.wasShown();
+    this.registerCSSFiles([rnWelcomeStyles]);
+    this.render();
+    UI.InspectorView.InspectorView.instance().showDrawer(true);
+  }
+
+  render(): void {
+    render(html`
+      <div class="rn-welcome-panel">
+        <div class="rn-welcome-header">
+          <img class="rn-welcome-icon" src="/Images/react_native/welcomeIcon.png" role="presentation" />
+          <div class="rn-welcome-title">
+            ${i18nString(UIStrings.debuggerBrandName)}
+          </div>
+        </div>
+        <div class="rn-welcome-tagline">
+          ${i18nString(UIStrings.welcomeMessage)}
+        </div>
+        <div class="rn-welcome-links">
+          <x-link class="devtools-link" href="https://reactnative.dev/docs/next/debugging">
+            ${i18nString(UIStrings.docsLabel)}
+          </x-link>
+          <x-link class="devtools-link" href="https://reactnative.dev/blog/tags/debugging">
+            ${i18nString(UIStrings.whatsNewLabel)}
+          </x-link>
+        </div>
+      </div>
+    `, this.contentElement, {host: this});
+  }
+}

front_end/panels/rn_welcome/rnWelcome.css

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2021 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.
+ */
+
+.rn-welcome-panel {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  padding: 16px;
+  text-align: center;
+  font-size: 1rem;
+  background-color: var(--color-background-elevation-0);
+}
+
+.rn-welcome-header {
+  display: flex;
+  align-items: center;
+  margin-bottom: 16px;
+}
+
+.rn-welcome-icon {
+  width: 30px;
+  height: 30px;
+  border-radius: 4px;
+  margin-right: 12px;
+}
+
+.rn-welcome-title {
+  font-size: 20px;
+  color: var(--color-text-primary);
+}
+
+.rn-welcome-tagline {
+  margin-bottom: 24px;
+  font-size: 1rem;
+  line-height: 1.3;
+  color: var(--color-text-secondary);
+}
+
+.rn-welcome-links {
+  display: flex;
+  align-items: center;
+}
+
+.rn-welcome-links > .devtools-link {
+  position: relative;
+  margin: 0 16px;
+  font-size: 14px;
+}
+
+.rn-welcome-links > .devtools-link:not(:last-child)::after {
+  content: "";
+  position: absolute;
+  right: -16px;
+  height: 16px;
+  border-right: 1px solid var(--color-details-hairline);
+}

front_end/panels/rn_welcome/rn_welcome-meta.ts

@@ -0,0 +1,46 @@
+// Copyright 2020 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 i18n from '../../core/i18n/i18n.js';
+import * as Root from '../../core/root/root.js';
+import * as UI from '../../ui/legacy/legacy.js';
+
+import type * as RNWelcome from './rn_welcome.js';
+
+const UIStrings = {
+  /**
+   * @description Title of the Welcome panel, plus an emoji symbolizing React Native
+   */
+  rnWelcome: '⚛️ Welcome',
+
+  /**
+   * @description Command for showing the Welcome panel
+   */
+  showRnWelcome: 'Show React Native Welcome panel',
+};
+const str_ = i18n.i18n.registerUIStrings('panels/rn_welcome/rn_welcome-meta.ts', UIStrings);
+const i18nLazyString = i18n.i18n.getLazilyComputedLocalizedString.bind(undefined, str_);
+
+let loadedRNWelcomeModule: (typeof RNWelcome|undefined);
+
+async function loadRNWelcomeModule(): Promise<typeof RNWelcome> {
+  if (!loadedRNWelcomeModule) {
+    loadedRNWelcomeModule = await import('./rn_welcome.js');
+  }
+  return loadedRNWelcomeModule;
+}
+
+UI.ViewManager.registerViewExtension({
+  location: UI.ViewManager.ViewLocationValues.PANEL,
+  id: 'rn-welcome',
+  title: i18nLazyString(UIStrings.rnWelcome),
+  commandPrompt: i18nLazyString(UIStrings.showRnWelcome),
+  order: -10,
+  persistence: UI.ViewManager.ViewPersistence.PERMANENT,
+  async loadView() {
+    const RNWelcome = await loadRNWelcomeModule();
+    return RNWelcome.RNWelcome.RNWelcomeImpl.instance();
+  },
+  experiment: Root.Runtime.ExperimentName.REACT_NATIVE_SPECIFIC_UI,
+});

front_end/panels/rn_welcome/rn_welcome.ts

@@ -0,0 +1,11 @@
+// Copyright 2019 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 './RNWelcome.js';
+
+import * as RNWelcome from './RNWelcome.js';
+
+export {
+  RNWelcome,
+};