42 lines
2.2 KiB
JavaScript
42 lines
2.2 KiB
JavaScript
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"use strict";
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'use client';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.useTextNavigation = useTextNavigation;
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var React = _interopRequireWildcard(require("react"));
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function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
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function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
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const TEXT_NAVIGATION_RESET_TIMEOUT = 500; // milliseconds
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/**
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* @ignore - internal hook.
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*
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* Provides a handler for text navigation.
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* It's used to navigate a list by typing the first letters of the options.
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*
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* @param callback A function to be called when the navigation should be performed.
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* @returns A function to be used in a keydown event handler.
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*/
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function useTextNavigation(callback) {
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const textCriteriaRef = React.useRef({
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searchString: '',
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lastTime: null
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});
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return React.useCallback(event => {
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if (event.key.length === 1 && event.key !== ' ') {
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const textCriteria = textCriteriaRef.current;
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const lowerKey = event.key.toLowerCase();
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const currentTime = performance.now();
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if (textCriteria.searchString.length > 0 && textCriteria.lastTime && currentTime - textCriteria.lastTime > TEXT_NAVIGATION_RESET_TIMEOUT) {
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textCriteria.searchString = lowerKey;
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} else if (textCriteria.searchString.length !== 1 || lowerKey !== textCriteria.searchString) {
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// If there is just one character in the buffer and the key is the same, do not append
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textCriteria.searchString += lowerKey;
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}
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textCriteria.lastTime = currentTime;
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callback(textCriteria.searchString, event);
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}
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}, [callback]);
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}
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