Method onMouseMove_

src/input.js:221–251

* @param {!Event} e * @return {!Promise|undefined} * @private

(e)

   * @private
   */
  onMouseMove_(e) {
    // The event explicitly states that it's a result of a touch event.
    if (e.sourceCapabilities && e.sourceCapabilities.firesTouchEvents) {
      this.mouseCanceled_();
      return undefined;
    }
    if (!this.boundMouseConfirmed_) {
      this.boundMouseConfirmed_ = this.mouseConfirmed_.bind(this);
      this.boundMouseCanceled_ = this.mouseCanceled_.bind(this);
    }
    // If "click" arrives within a timeout time, this is most likely a
    // touch/mouse emulation. Otherwise, if timeout exceeded, this looks
    // like a legitimate mouse event.
    let unlisten;
    const listenPromise = listenOncePromise(
      this.win.document,
      'click',
      /* capture */ undefined,
      (unlistener) => {
        unlisten = unlistener;
      }
    );
    return Services.timerFor(this.win)
      .timeoutPromise(CLICK_TIMEOUT_, listenPromise)
      .then(this.boundMouseCanceled_, () => {
        if (unlisten) {
          unlisten();
        }
        this.boundMouseConfirmed_();
      });
  }

  /** @private */
  mouseConfirmed_() {