feat: convert main to TypeScript

- Use module level variables
- export functions directly
- no null set is needed in deactivate
- fix import and types

src/main.ts

@@ -0,0 +1,50 @@
+import { CompositeDisposable } from "atom"
+import { SignatureHelpManager } from "./signature-help-manager"
+import { SignatureHelpRegistry } from "atom-ide-base"
+
+let subscriptions: CompositeDisposable
+let signatureHelpManager: SignatureHelpManager
+
+/**
+ * called by Atom when activating an extension
+ */
+export function activate() {
+  // Events subscribed to in atom's system can be easily cleaned up with a CompositeDisposable
+  subscriptions = new CompositeDisposable()
+  if (!signatureHelpManager) signatureHelpManager = new SignatureHelpManager()
+  subscriptions.add(signatureHelpManager)
+  require("atom-package-deps")
+    .install("atom-ide-signature-help")
+    .then(() => {
+      signatureHelpManager.initialize(renderer)
+    })
+}
+
+/**
+ * called by Atom when deactivating an extension
+ */
+export function deactivate() {
+  if (subscriptions) {
+    subscriptions.dispose()
+  }
+}
+
+export function provideSignatureHelp(): SignatureHelpRegistry {
+  return signatureHelpManager.signatureHelpRegistry
+}
+
+export const config = {
+  showSignatureHelpOnTyping: {
+    title: "Show signature automatically",
+    description:
+      "If set to true, the signature help is shown as soon as you start typing. Otherwise you will have to activate it via keypress.",
+    type: "boolean",
+    default: true,
+  },
+  glowOnHover: {
+    title: "Glow on hover",
+    description: "Should signature glow when you hover on it?",
+    type: "boolean",
+    default: true,
+  },
+}

src/signature-help-manager.ts

@@ -3,7 +3,7 @@ import { ProviderRegistry } from "atom-ide-base/commons-atom/ProviderRegistry"
 import { ViewContainer } from "atom-ide-base/commons-ui/float-pane/ViewContainer"
 import { makeOverlaySelectable, makeOverLayCopyable } from "atom-ide-base/commons-ui/float-pane/selectable-overlay"
 
-export default class SignatureHelpManager {
+export class SignatureHelpManager {
   /**
    * holds a reference to disposable items from this data tip manager
    */