Method _handleArrowUpDown

packages/main/src/TableNavigation.ts:166–181

(e: KeyboardEvent, eventOrigin: HTMLElement, direction: -1 | 1)

	}

	_handleArrowUpDown(e: KeyboardEvent, eventOrigin: HTMLElement, direction: -1 | 1) {
		if (e.shiftKey || e.altKey || e.ctrlKey || e.metaKey || e.defaultPrevented || this._isEventFromCurrentItem(e) || /^(input|textarea)$/i.test(eventOrigin.nodeName)) {
			return false;
		}

		this._setCurrentItem(e, currentItem => {
			this._tabPosition = getTabbableElements(currentItem).indexOf(eventOrigin);
			this._gridWalker.setRowPos(this._gridWalker.getRowPos() + direction);
			let elementToFocus = this._gridWalker.getCurrent() as HTMLElement;
			const tabbables = getTabbableElements(elementToFocus);
			elementToFocus = tabbables[this._tabPosition] || tabbables.pop() || elementToFocus;
			this._focusElement(elementToFocus);
			e.preventDefault();
		});
		return false;
	}

	_handleArrowUp(e: KeyboardEvent, eventOrigin: HTMLElement) {
		return this._handleArrowUpDown(e, eventOrigin, -1);