Dispose events

https://github.com/microsoft/vscode/issues/155232

The events that is setup for needs to be disposed for js to be able
to garbage collect the terminals.

src/browser/Linkifier.ts

@@ -53,6 +53,12 @@ export class Linkifier implements ILinkifier {
     };
   }
 
+  public dispose(): void {
+    this._onShowLinkUnderline.dispose();
+    this._onHideLinkUnderline.dispose();
+    this._onLinkTooltip.dispose();
+  }
+
   /**
    * Attaches the linkifier to the DOM, enabling linkification.
    * @param mouseZoneManager The mouse zone manager to register link zones with.

src/browser/Linkifier2.ts

@@ -38,6 +38,13 @@ export class Linkifier2 extends Disposable implements ILinkifier2 {
     this.register(getDisposeArrayDisposable(this._linkCacheDisposables));
   }
 
+  public dispose(): void {
+    super.dispose();
+    this._onShowLinkUnderline.dispose();
+    this._onHideLinkUnderline.dispose();
+    this._lastMouseEvent = undefined;
+  }
+
   public registerLinkProvider(linkProvider: ILinkProvider): IDisposable {
     this._linkProviders.push(linkProvider);
     return {

src/browser/Terminal.ts

@@ -247,8 +247,12 @@ export class Terminal extends CoreTerminal implements ITerminal {
     super.dispose();
     this._renderService?.dispose();
     this._customKeyEventHandler = undefined;
+    this._overviewRulerRenderer?.dispose();
+    this._overviewRulerRenderer = undefined;
     this.write = () => { };
     this.element?.parentNode?.removeChild(this.element);
+    this.linkifier.dispose();
+    this.linkifier2.dispose();
   }
 
   protected _setup(): void {

src/browser/Types.d.ts

@@ -201,6 +201,7 @@ export interface ILinkifier {
   linkifyRows(start: number, end: number): void;
   registerLinkMatcher(regex: RegExp, handler: LinkMatcherHandler, options?: ILinkMatcherOptions): number;
   deregisterLinkMatcher(matcherId: number): boolean;
+  dispose(): void;
 }
 
 interface ILinkState {
@@ -219,6 +220,7 @@ export interface ILinkifier2 {
 
   attachToDom(element: HTMLElement, mouseService: IMouseService, renderService: IRenderService): void;
   registerLinkProvider(linkProvider: ILinkProvider): IDisposable;
+  dispose(): void;
 }
 
 export interface ILinkMatcherOptions {