@elastic/eui
Version:
Elastic UI Component Library
114 lines (111 loc) • 5.14 kB
JavaScript
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$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(r) { if (Array.isArray(r)) return r; }
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
import { useCallback, useEffect, useRef, useState } from 'react';
import PropTypes from "prop-types";
import { useObserver } from '../use_observer';
export var hasResizeObserver = typeof window !== 'undefined' && typeof window.ResizeObserver !== 'undefined';
export var EuiResizeObserver = function EuiResizeObserver(_ref) {
var children = _ref.children,
onResize = _ref.onResize;
var onResizeRef = useRef(onResize);
onResizeRef.current = onResize;
var sizeRef = useRef({
height: 0,
width: 0
});
var resizeCallback = useCallback(function (_ref2) {
var _ref3 = _slicedToArray(_ref2, 1),
entry = _ref3[0];
var _entry$borderBoxSize$ = entry.borderBoxSize[0],
width = _entry$borderBoxSize$.inlineSize,
height = _entry$borderBoxSize$.blockSize;
// Check for actual resize event
if (sizeRef.current.height === height && sizeRef.current.width === width) {
return;
}
sizeRef.current = {
height: height,
width: width
};
onResizeRef.current({
height: height,
width: width
});
}, []);
var beginObserve = useCallback(function (node) {
return makeResizeObserver(node, resizeCallback);
}, [resizeCallback]);
var updateChildNode = useObserver(beginObserve, 'EuiResizeObserver');
return children(updateChildNode);
};
EuiResizeObserver.propTypes = {
/**
* ReactNode to render as this component's content
*/
children: PropTypes.func.isRequired,
onResize: PropTypes.func.isRequired
};
EuiResizeObserver.displayName = 'EuiResizeObserver';
var makeResizeObserver = function makeResizeObserver(node, callback) {
var observer;
if (hasResizeObserver) {
observer = new window.ResizeObserver(callback);
observer.observe(node);
}
return observer;
};
export var useResizeObserver = function useResizeObserver(container, dimension) {
var _useState = useState({
width: 0,
height: 0
}),
_useState2 = _slicedToArray(_useState, 2),
size = _useState2[0],
_setSize = _useState2[1];
// _currentDimensions and _setSize are used to only store the
// new state (and trigger a re-render) when the new dimensions actually differ
var _currentDimensions = useRef(size);
var setSize = useCallback(function (dimensions) {
var doesWidthMatter = dimension !== 'height';
var doesHeightMatter = dimension !== 'width';
if (doesWidthMatter && _currentDimensions.current.width !== dimensions.width || doesHeightMatter && _currentDimensions.current.height !== dimensions.height) {
_currentDimensions.current = dimensions;
_setSize(dimensions);
}
}, [dimension]);
useEffect(function () {
if (container != null) {
var observer = makeResizeObserver(container, function (_ref4) {
var _ref5 = _slicedToArray(_ref4, 1),
entry = _ref5[0];
var _entry$borderBoxSize$2 = entry.borderBoxSize[0],
inlineSize = _entry$borderBoxSize$2.inlineSize,
blockSize = _entry$borderBoxSize$2.blockSize;
setSize({
width: inlineSize,
height: blockSize
});
});
return function () {
return observer && observer.disconnect();
};
} else {
setSize({
width: 0,
height: 0
});
}
}, [container, setSize]);
return size;
};