Rename HMRLoadingView to LoadingView

Summary:
This view will be re-used for bundle splitting so I'm changing the name to be more generic as it can be used for informing users of any loading activity.

I also cleaned up the files a bit from a class to just an object.

Reviewed By: gaearon

Differential Revision: D16281367

fbshipit-source-id: 5c2ee7790d29ccba473bd6e90737d2f0581e6291

.flowconfig

@@ -19,7 +19,7 @@
 .*/node_modules/warning/.*
 
 ; Flow doesn't support platforms
-.*/Libraries/Utilities/HMRLoadingView.js
+.*/Libraries/Utilities/LoadingView.js
 
 [untyped]
 .*/node_modules/@react-native-community/cli/.*/.*

.flowconfig.android

@@ -19,7 +19,7 @@
 .*/node_modules/warning/.*
 
 ; Flow doesn't support platforms
-.*/Libraries/Utilities/HMRLoadingView.js
+.*/Libraries/Utilities/LoadingView.js
 
 [untyped]
 .*/node_modules/@react-native-community/cli/.*/.*

Libraries/Utilities/HMRClient.js

@@ -107,7 +107,7 @@ const HMRClient: HMRClientNativeInterface = {
     invariant(!hmrClient, 'Cannot initialize hmrClient twice');
 
     // Moving to top gives errors due to NativeModules not being initialized
-    const HMRLoadingView = require('./HMRLoadingView');
+    const LoadingView = require('./LoadingView');
 
     const wsHost = port !== null && port !== '' ? `${host}:${port}` : host;
     const client = new MetroHMRClient(`ws://${wsHost}/hot`);
@@ -172,7 +172,7 @@ Error: ${e.message}`;
 
     client.on('update-start', () => {
       if (isFastRefreshActive()) {
-        HMRLoadingView.showMessage('Refreshing...');
+        LoadingView.showMessage('Refreshing...');
       }
     });
 
@@ -183,11 +183,11 @@ Error: ${e.message}`;
     });
 
     client.on('update-done', () => {
-      HMRLoadingView.hide();
+      LoadingView.hide();
     });
 
     client.on('error', data => {
-      HMRLoadingView.hide();
+      LoadingView.hide();
 
       if (data.type === 'GraphNotFoundError') {
         client.disable();
@@ -212,7 +212,7 @@ Error: ${e.message}`;
     });
 
     client.on('close', data => {
-      HMRLoadingView.hide();
+      LoadingView.hide();
       setHMRUnavailableReason(
         'Disconnected from the Metro server. Fast Refresh will be disabled until you reload the application.',
       );

Libraries/Utilities/LoadingView.android.js

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @flow
+ */
+
+'use strict';
+
+import ToastAndroid from '../Components/ToastAndroid/ToastAndroid';
+
+const TOAST_SHORT_DELAY = 2000;
+let isVisible = false;
+
+module.exports = {
+  showMessage(message: string) {
+    if (!isVisible) {
+      ToastAndroid.show(message, ToastAndroid.SHORT);
+      isVisible = true;
+      setTimeout(() => {
+        isVisible = false;
+      }, TOAST_SHORT_DELAY);
+    }
+  },
+  hide() {},
+};

Libraries/Utilities/HMRLoadingView.ios.js → Libraries/Utilities/LoadingView.ios.js

@@ -10,26 +10,21 @@
 
 'use strict';
 
-const processColor = require('../StyleSheet/processColor');
+import processColor from '../StyleSheet/processColor';
 import NativeDevLoadingView from './NativeDevLoadingView';
 
-class HMRLoadingView {
-  static showMessage(message: string) {
-    if (NativeDevLoadingView != null) {
+module.exports = {
+  showMessage(message: string) {
+    if (NativeDevLoadingView) {
       NativeDevLoadingView.showMessage(
         message,
         // Use same colors as iOS "Personal Hotspot" bar.
         processColor('#ffffff'),
         processColor('#2584e8'),
       );
     }
-  }
-
-  static hide() {
-    if (NativeDevLoadingView != null) {
-      NativeDevLoadingView.hide();
-    }
-  }
-}
-
-module.exports = HMRLoadingView;
+  },
+  hide() {
+    NativeDevLoadingView && NativeDevLoadingView.hide();
+  },
+};

Libraries/Utilities/HMRLoadingView.js → Libraries/Utilities/LoadingView.js

@@ -10,14 +10,7 @@
 
 'use strict';
 
-class HMRLoadingView {
-  static showMessage(message: string) {
-    // noop
-  }
-
-  static hide() {
-    // noop
-  }
-}
-
-module.exports = HMRLoadingView;
+module.exports = {
+  showMessage(message: string) {},
+  hide() {},
+};

template/_flowconfig

@@ -13,7 +13,7 @@ node_modules/react-native/Libraries/polyfills/.*
 node_modules/warning/.*
 
 ; Flow doesn't support platforms
-.*/Libraries/Utilities/HMRLoadingView.js
+.*/Libraries/Utilities/LoadingView.js
 
 [untyped]
 .*/node_modules/@react-native-community/cli/.*/.*