public startMonitoring(
		mouseMoveEventMerger: IEventMerger<R>,
		mouseMoveCallback: IMouseMoveCallback<R>,
		onStopCallback: IOnStopCallback
	): void {
		if (this.isMonitoring()) {
			// I am already hooked
			return;
		}
		this.mouseMoveEventMerger = mouseMoveEventMerger;
		this.mouseMoveCallback = mouseMoveCallback;
		this.onStopCallback = onStopCallback;

		let windowChain = IframeUtils.getSameOriginWindowChain();
		for (let i = 0; i < windowChain.length; i++) {
			this.hooks.push(dom.addDisposableThrottledListener(windowChain[i].window.document, 'mousemove',
				(data: R) => this.mouseMoveCallback(data),
				(lastEvent: R, currentEvent) => this.mouseMoveEventMerger(lastEvent, currentEvent as MouseEvent)
			));
			this.hooks.push(dom.addDisposableListener(windowChain[i].window.document, 'mouseup', (e: MouseEvent) => this.stopMonitoring(true)));
		}

		if (IframeUtils.hasDifferentOriginAncestor()) {
			let lastSameOriginAncestor = windowChain[windowChain.length - 1];
			// We might miss a mouse up if it happens outside the iframe
			// This one is for Chrome
			this.hooks.push(dom.addDisposableListener(lastSameOriginAncestor.window.document, 'mouseout', (browserEvent: MouseEvent) => {
				let e = new StandardMouseEvent(browserEvent);
				if (e.target.tagName.toLowerCase() === 'html') {
					this.stopMonitoring(true);
				}
			}));
			// This one is for FF
			this.hooks.push(dom.addDisposableListener(lastSameOriginAncestor.window.document, 'mouseover', (browserEvent: MouseEvent) => {
				let e = new StandardMouseEvent(browserEvent);
				if (e.target.tagName.toLowerCase() === 'html') {
					this.stopMonitoring(true);
				}
			}));
			// This one is for IE
			this.hooks.push(dom.addDisposableListener(lastSameOriginAncestor.window.document.body, 'mouseleave', (browserEvent: MouseEvent) => {
				this.stopMonitoring(true);
			}));
		}
	}

	public onMouseMoveThrottled(target: HTMLElement, callback: (e: EditorMouseEvent) => void, merger: EditorMouseEventMerger, minimumTimeMs: number): IDisposable {
		let myMerger: dom.IEventMerger<EditorMouseEvent> = (lastEvent: EditorMouseEvent, currentEvent: MouseEvent): EditorMouseEvent => {
			return merger(lastEvent, this._create(currentEvent));
		};
		return dom.addDisposableThrottledListener<EditorMouseEvent>(target, 'mousemove', callback, myMerger, minimumTimeMs);
	}