Move Electron stuff to separate folder, decapitate restart

Summary: Per title

Reviewed By: passy

Differential Revision: D31991715

fbshipit-source-id: 9ca58cdd26c1f540fbe09dcfc7b7f5e7a319ea7d

desktop/app/src/electron/initializeElectron.tsx

@@ -0,0 +1,80 @@
+/**
+ * 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
+ */
+
+import path from 'path';
+import {
+  _NuxManagerContext,
+  _createNuxManager,
+  _setGlobalInteractionReporter,
+  _LoggerContext,
+} from 'flipper-plugin';
+// eslint-disable-next-line flipper/no-electron-remote-imports
+import {ipcRenderer, remote, SaveDialogReturnValue} from 'electron';
+import {setRenderHostInstance} from '../RenderHost';
+import {clipboard} from 'electron';
+import restart from './restartFlipper';
+
+export function initializeElectron() {
+  setRenderHostInstance({
+    processId: remote.process.pid,
+    readTextFromClipboard() {
+      return clipboard.readText();
+    },
+    async showSaveDialog(options) {
+      return (await remote.dialog.showSaveDialog(options))?.filePath;
+    },
+    async showOpenDialog({filter, defaultPath}) {
+      const result = await remote.dialog.showOpenDialog({
+        defaultPath,
+        properties: ['openFile'],
+        filters: filter ? [filter] : undefined,
+      });
+      return result.filePaths?.[0];
+    },
+    showSelectDirectoryDialog(defaultPath = path.resolve('/')) {
+      return remote.dialog
+        .showOpenDialog({
+          properties: ['openDirectory'],
+          defaultPath,
+        })
+        .then((result: SaveDialogReturnValue & {filePaths: string[]}) => {
+          if (result.filePath) {
+            return result.filePath.toString();
+          }
+          // Electron typings seem of here, just in case,
+          // (can be tested with settings dialog)
+          // handle both situations
+          if (result.filePaths) {
+            return result.filePaths[0];
+          }
+          return undefined;
+        });
+    },
+    registerShortcut(shortcut, callback) {
+      remote.globalShortcut.register(shortcut, callback);
+    },
+    hasFocus() {
+      return remote.getCurrentWindow().isFocused();
+    },
+    onIpcEvent(event, callback) {
+      ipcRenderer.on(event, (_ev, ...args: any[]) => {
+        callback(...(args as any));
+      });
+    },
+    sendIpcEvent(event, ...args: any[]) {
+      ipcRenderer.send(event, ...args);
+    },
+    shouldUseDarkColors() {
+      return remote.nativeTheme.shouldUseDarkColors;
+    },
+    restartFlipper() {
+      restart();
+    },
+  });
+}