Remove terminal.bell usage

src/InputHandler.ts

@@ -135,6 +135,8 @@ export class InputHandler extends Disposable implements IInputHandler {
   public get onRequestRefreshRows(): IEvent<number, number> { return this._onRequestRefreshRows.event; }
   private _onRequestReset = new EventEmitter<void>();
   public get onRequestReset(): IEvent<void> { return this._onRequestReset.event; }
+  private _onRequestBell = new EventEmitter<void>();
+  public get onRequestBell(): IEvent<void> { return this._onRequestBell.event; }
   private _onCursorMove = new EventEmitter<void>();
   public get onCursorMove(): IEvent<void> { return this._onCursorMove.event; }
   private _onLineFeed = new EventEmitter<void>();
@@ -143,7 +145,7 @@ export class InputHandler extends Disposable implements IInputHandler {
   public get onScroll(): IEvent<number> { return this._onScroll.event; }
 
   constructor(
-    protected _terminal: IInputHandlingTerminal,
+    private _terminal: IInputHandlingTerminal,
     private readonly _bufferService: IBufferService,
     private readonly _charsetService: ICharsetService,
     private readonly _coreService: ICoreService,
@@ -543,7 +545,7 @@ export class InputHandler extends Disposable implements IInputHandler {
    * Bell (Ctrl-G).
    */
   public bell(): void {
-    this._terminal.bell();
+    this._onRequestBell.fire();
   }
 
   /**

src/Terminal.ts

@@ -257,6 +257,7 @@ export class Terminal extends Disposable implements ITerminal, IDisposable, IInp
 
     // Register input handler and refire/handle events
     this._inputHandler = new InputHandler(this, this._bufferService, this._charsetService, this._coreService, this._dirtyRowService, this._logService, this.optionsService, this._coreMouseService);
+    this._inputHandler.onRequestBell(() => this.bell());
     this._inputHandler.onRequestRefreshRows((start, end) => this.refresh(start, end));
     this._inputHandler.onRequestReset(() => this.reset());
     this._inputHandler.onCursorMove(() => this._onCursorMove.fire());

src/Types.d.ts

@@ -38,7 +38,6 @@ export interface IInputHandlingTerminal {
   onA11yCharEmitter: IEventEmitter<string>;
   onA11yTabEmitter: IEventEmitter<number>;
 
-  bell(): void;
   focus(): void;
   scroll(eraseAttr: IAttributeData, isWrapped?: boolean): void;
   is(term: string): boolean;