@elastic/eui
Version:
Elastic UI Component Library
72 lines (71 loc) • 4.83 kB
JavaScript
;
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.useOverflow = void 0;
var _react = require("react");
var _mutation_observer = require("../observer/mutation_observer");
var _resize_observer = require("../observer/resize_observer");
function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
function _slicedToArray(r, e) { return _arrayWithHoles(r) || _iterableToArrayLimit(r, e) || _unsupportedIterableToArray(r, e) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(r) { if (Array.isArray(r)) return r; } /*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
/**
* Overflow logic - returns overflow-related state/logic/utils
*
* Detects whether the code block overflows and returns a tabIndex of 0 if so,
* which allows keyboard users to use the up/down arrow keys to scroll through
* the container.
*/
var useOverflow = exports.useOverflow = function useOverflow(_ref) {
var overflowHeight = _ref.overflowHeight;
var _useState = (0, _react.useState)(null),
_useState2 = _slicedToArray(_useState, 2),
wrapperRef = _useState2[0],
setWrapperRef = _useState2[1];
var _useState3 = (0, _react.useState)(-1),
_useState4 = _slicedToArray(_useState3, 2),
tabIndex = _useState4[0],
setTabIndex = _useState4[1];
var _useResizeObserver = (0, _resize_observer.useResizeObserver)(wrapperRef),
width = _useResizeObserver.width,
height = _useResizeObserver.height;
var doesOverflow = function doesOverflow() {
if (!wrapperRef) return;
var clientWidth = wrapperRef.clientWidth,
clientHeight = wrapperRef.clientHeight,
scrollWidth = wrapperRef.scrollWidth,
scrollHeight = wrapperRef.scrollHeight;
var doesOverflow = scrollHeight > clientHeight || scrollWidth > clientWidth;
setTabIndex(doesOverflow ? 0 : -1);
};
(0, _mutation_observer.useMutationObserver)(wrapperRef, doesOverflow, {
subtree: true,
childList: true
});
(0, _react.useEffect)(doesOverflow, [width, height, wrapperRef]);
var overflowHeightStyles = (0, _react.useMemo)(function () {
if (overflowHeight) {
var property = typeof overflowHeight === 'string' ? 'blockSize' : 'maxBlockSize';
return _defineProperty({}, property, overflowHeight);
}
return {};
}, [overflowHeight]);
return {
setWrapperRef: setWrapperRef,
tabIndex: tabIndex,
overflowHeightStyles: overflowHeightStyles
};
};