Method onFocus

packages/react-aria/src/dnd/DragManager.ts:269–308

(e: FocusEvent)

  }

  onFocus(e: FocusEvent): void {
    let activateButton = this.getCurrentActivateButton();
    let eventTarget = getEventTarget(e);
    if (eventTarget === activateButton) {
      // TODO: canceling this breaks the focus ring. Revisit when we support tabbing.
      this.cancelEvent(e);
      return;
    }

    // Prevent focus events, except to the original drag target.
    if (eventTarget !== this.dragTarget.element) {
      this.cancelEvent(e);
    }

    // Ignore focus events on the window/document (JSDOM). Will be handled in onBlur, below.
    if (!(eventTarget instanceof HTMLElement) || eventTarget === this.dragTarget.element) {
      return;
    }

    let dropTarget =
      this.validDropTargets.find(target => target.element === eventTarget) ||
      this.validDropTargets.find(target => nodeContains(target.element, eventTarget));

    if (!dropTarget) {
      // if (e.target === activateButton) {
      //   activateButton.focus();
      // }
      if (this.currentDropTarget) {
        this.currentDropTarget.element.focus();
      } else {
        this.dragTarget.element.focus();
      }
      return;
    }

    let item = dropItems.get(eventTarget);
    if (dropTarget) {
      this.setCurrentDropTarget(dropTarget, item);
    }
  }

  onBlur(e: FocusEvent): void {
    let activateButton = this.getCurrentActivateButton();