@elastic/eui/test-env/services/breakpoint/current_breakpoint.js

Elastic UI Component Library

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _typeof = require("@babel/runtime/helpers/typeof");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.CurrentEuiBreakpointProvider = exports.CurrentEuiBreakpointContext = void 0;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = _interopRequireWildcard(require("react"));
var _common = require("../../components/common");
var _hooks = require("../theme/hooks");
var _throttle = require("../throttle");
var _sorting = require("./_sorting");
var _react2 = require("@emotion/react");
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }
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 && {}.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; }
/*
 * 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.
 */

var CurrentEuiBreakpointContext = exports.CurrentEuiBreakpointContext = /*#__PURE__*/(0, _react.createContext)(undefined);

/**
 * Returns the current breakpoint based on window width.
 * Typically only called by the top-level `EuiProvider` (to reduce the number
 * of window resize listeners on the page). Also conditionally called if a
 * nested `EuiThemeProvider` defines a `modify.breakpoint` override
 */
var CurrentEuiBreakpointProvider = exports.CurrentEuiBreakpointProvider = function CurrentEuiBreakpointProvider(_ref) {
  var children = _ref.children;
  // Obtain the breakpoints map from the EUI theme
  var _useEuiTheme = (0, _hooks.useEuiTheme)(),
    breakpoints = _useEuiTheme.euiTheme.breakpoint;

  // Ensure the breakpoints map is sorted from largest value to smallest
  var sortedBreakpoints = (0, _react.useMemo)(function () {
    return (0, _sorting.sortMapByLargeToSmallValues)(breakpoints);
  }, [breakpoints]);

  // Find the breakpoint (key) whose value is <= windowWidth starting with largest first
  var getBreakpoint = (0, _react.useCallback)(function (width) {
    return (0, _common.keysOf)(sortedBreakpoints).find(function (key) {
      return sortedBreakpoints[key] <= width;
    });
  }, [sortedBreakpoints]);
  var _useState = (0, _react.useState)(typeof window !== 'undefined' ? getBreakpoint(window.innerWidth) : undefined),
    _useState2 = (0, _slicedToArray2.default)(_useState, 2),
    currentBreakpoint = _useState2[0],
    setCurrentBreakpoint = _useState2[1];
  (0, _react.useEffect)(function () {
    var onWindowResize = (0, _throttle.throttle)(function () {
      setCurrentBreakpoint(getBreakpoint(window.innerWidth));
    }, 50);
    window.addEventListener('resize', onWindowResize);
    return function () {
      return window.removeEventListener('resize', onWindowResize);
    };
  }, [getBreakpoint]);
  return (0, _react2.jsx)(CurrentEuiBreakpointContext.Provider, {
    value: currentBreakpoint
  }, children);
};