79023ee190
Reviewed By: bhamodi Differential Revision: D33331422 fbshipit-source-id: 016e8dcc0c0c7f1fc353a348b54fda0d5e2ddc01
53 lines
1.3 KiB
TypeScript
53 lines
1.3 KiB
TypeScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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*/
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import {useEffect, useState} from 'react';
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import {AutoCompleteLineItem} from '../types';
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export const useItemNavigation = (
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lineItems: Array<AutoCompleteLineItem>,
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onHighlighted: (uri: string) => void,
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) => {
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const [selectedItem, setSelectedItem] = useState(0);
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const handleKeyPress = (event: KeyboardEvent) => {
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switch (event.key) {
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case 'ArrowDown': {
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const newSelectedItem =
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selectedItem < lineItems.length - 1
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? selectedItem + 1
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: lineItems.length - 1;
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setSelectedItem(newSelectedItem);
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onHighlighted(lineItems[newSelectedItem].uri);
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break;
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}
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case 'ArrowUp': {
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const newSelectedItem =
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selectedItem > 0 ? selectedItem - 1 : selectedItem;
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setSelectedItem(newSelectedItem);
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onHighlighted(lineItems[newSelectedItem].uri);
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break;
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}
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default: {
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setSelectedItem(0);
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break;
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}
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}
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};
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useEffect(() => {
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window.addEventListener('keydown', handleKeyPress);
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return () => {
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window.removeEventListener('keydown', handleKeyPress);
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};
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});
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return selectedItem;
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};
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