Enables sandbox for all windows except main

ts/util/os/shared.ts

@@ -0,0 +1,68 @@
+// Copyright 2018 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import semver from 'semver';
+
+function createIsPlatform(
+  platform: typeof process.platform,
+  osRelease: string
+): (minVersion?: string) => boolean {
+  return minVersion => {
+    if (process.platform !== platform) {
+      return false;
+    }
+    if (minVersion === undefined) {
+      return true;
+    }
+
+    return semver.gte(osRelease, minVersion);
+  };
+}
+
+export type OSType = {
+  getClassName: () => string;
+  getName: () => string;
+  hasCustomTitleBar: () => boolean;
+  isLinux: (minVersion?: string) => boolean;
+  isMacOS: (minVersion?: string) => boolean;
+  isWindows: (minVersion?: string) => boolean;
+};
+
+export function getOSFunctions(osRelease: string): OSType {
+  const isMacOS = createIsPlatform('darwin', osRelease);
+  const isLinux = createIsPlatform('linux', osRelease);
+  const isWindows = createIsPlatform('win32', osRelease);
+
+  // Windows 10 and above
+  const hasCustomTitleBar = (): boolean =>
+    isWindows('10.0.0') || Boolean(process.env.CUSTOM_TITLEBAR);
+
+  const getName = (): string => {
+    if (isMacOS()) {
+      return 'macOS';
+    }
+    if (isWindows()) {
+      return 'Windows';
+    }
+    return 'Linux';
+  };
+
+  const getClassName = (): string => {
+    if (isMacOS()) {
+      return 'os-macos';
+    }
+    if (isWindows()) {
+      return 'os-windows';
+    }
+    return 'os-linux';
+  };
+
+  return {
+    getClassName,
+    getName,
+    hasCustomTitleBar,
+    isLinux,
+    isMacOS,
+    isWindows,
+  };
+}