Remove old event emitter

Fixes #2029

src/common/EventEmitter.test.ts

@@ -1,77 +0,0 @@
-/**
- * Copyright (c) 2017 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { assert } from 'chai';
-import { EventEmitter } from 'common/EventEmitter';
-
-describe('EventEmitter', () => {
-  let eventEmitter: EventEmitter;
-
-  beforeEach(() => {
-    eventEmitter = new EventEmitter();
-  });
-
-  describe('emit', () => {
-    it('should emit events to listeners', () => {
-      let count1 = 0;
-      let count2 = 0;
-      const listener1 = () => count1++;
-      const listener2 = () => count2++;
-      eventEmitter.on('test', listener1);
-      eventEmitter.on('test', listener2);
-      eventEmitter.emit('test');
-      assert.equal(count1, 1);
-      assert.equal(count2, 1);
-      eventEmitter.emit('test');
-      assert.equal(count1, 2);
-      assert.equal(count2, 2);
-    });
-
-    it('should manage multiple listener types', () => {
-      let count1 = 0;
-      let count2 = 0;
-      const listener1 = () => count1++;
-      const listener2 = () => count2++;
-      eventEmitter.on('test', listener1);
-      eventEmitter.on('foo', listener2);
-      eventEmitter.emit('test');
-      assert.equal(count1, 1);
-      assert.equal(count2, 0);
-      eventEmitter.emit('foo');
-      assert.equal(count1, 1);
-      assert.equal(count2, 1);
-    });
-  });
-
-  describe('listeners', () => {
-    it('should return listeners for the type requested', () => {
-      assert.equal(eventEmitter.listeners('test').length, 0);
-      const listener = () => {};
-      eventEmitter.on('test', listener);
-      assert.deepEqual(eventEmitter.listeners('test'), [listener]);
-    });
-  });
-
-  describe('off', () => {
-    it('should remove the specific listener', () => {
-      const listener1 = () => {};
-      const listener2 = () => {};
-      eventEmitter.on('foo', listener1);
-      eventEmitter.on('foo', listener2);
-      assert.equal(eventEmitter.listeners('foo').length, 2);
-      eventEmitter.off('foo', listener1);
-      assert.deepEqual(eventEmitter.listeners('foo'), [listener2]);
-    });
-  });
-
-  describe('removeAllListeners', () => {
-    it('should clear all listeners', () => {
-      eventEmitter.on('foo', () => {});
-      assert.equal(eventEmitter.listeners('foo').length, 1);
-      eventEmitter.removeAllListeners('foo');
-      assert.equal(eventEmitter.listeners('foo').length, 0);
-    });
-  });
-});

src/common/EventEmitter.ts

@@ -1,98 +0,0 @@
-/**
- * Copyright (c) 2017 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { IDisposable, IEventEmitter, XtermListener } from 'common/Types';
-import { Disposable } from 'common/Lifecycle';
-
-export class EventEmitter extends Disposable implements IEventEmitter, IDisposable {
-  private _events: {[type: string]: XtermListener[]};
-
-  constructor() {
-    super();
-    // Restore the previous events if available, this will happen if the
-    // constructor is called multiple times on the same object (terminal reset).
-    this._events = (<any>this)._events || {};
-  }
-
-  public on(type: string, listener: XtermListener): void {
-    this._events[type] = this._events[type] || [];
-    this._events[type].push(listener);
-  }
-
-  /**
-   * Adds a disposable listener to the EventEmitter, returning the disposable.
-   * @param type The event type.
-   * @param handler The handler for the listener.
-   */
-  public addDisposableListener(type: string, handler: XtermListener): IDisposable {
-    // TODO: Rename addDisposableEventListener to more easily disambiguate from Dom listener
-    this.on(type, handler);
-    let disposed = false;
-    return {
-      dispose: () => {
-        if (disposed) {
-          // Already disposed
-          return;
-        }
-        this.off(type, handler);
-        disposed = true;
-      }
-    };
-  }
-
-  public off(type: string, listener: XtermListener): void {
-    if (!this._events[type]) {
-      return;
-    }
-
-    const obj = this._events[type];
-    let i = obj.length;
-
-    while (i--) {
-      if (obj[i] === listener) {
-        obj.splice(i, 1);
-        return;
-      }
-    }
-  }
-
-  public removeAllListeners(type: string): void {
-    if (this._events[type]) {
-       delete this._events[type];
-    }
-  }
-
-  public emit(type: string, ...args: any[]): void {
-    if (!this._events[type]) {
-      return;
-    }
-    const obj = this._events[type];
-    for (let i = 0; i < obj.length; i++) {
-      obj[i].apply(this, args);
-    }
-  }
-
-  public emitMayRemoveListeners(type: string, ...args: any[]): void {
-    if (!this._events[type]) {
-      return;
-    }
-    const obj = this._events[type];
-    let length = obj.length;
-    for (let i = 0; i < obj.length; i++) {
-      obj[i].apply(this, args);
-      i -= length - obj.length;
-      length = obj.length;
-    }
-  }
-
-  public listeners(type: string): XtermListener[] {
-    return this._events[type] || [];
-  }
-
-  public dispose(): void {
-    super.dispose();
-    this._events = {};
-  }
-}