@atlaskit/dropdown-menu
Version:
A dropdown menu displays a list of actions or options to a user.
89 lines (87 loc) • 3.78 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _typeof = require("@babel/runtime/helpers/typeof");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = exports.FocusManagerContext = void 0;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = _interopRequireWildcard(require("react"));
var _bindEventListener = require("bind-event-listener");
var _noop = _interopRequireDefault(require("@atlaskit/ds-lib/noop"));
var _layering = require("@atlaskit/layering");
var _handleFocus = _interopRequireDefault(require("../utils/handle-focus"));
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, default: e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
/**
*
*
* Context provider which maintains the list of focusable elements and a method to
* register new menu items.
* This list drives the keyboard navigation of the menu.
*
*/
var FocusManagerContext = exports.FocusManagerContext = /*#__PURE__*/(0, _react.createContext)({
menuItemRefs: [],
registerRef: _noop.default
});
/**
* Focus manager logic.
*/
var FocusManager = function FocusManager(_ref) {
var children = _ref.children,
onClose = _ref.onClose;
var menuItemRefs = (0, _react.useRef)([]);
// Used to force a re-render only
var _useState = (0, _react.useState)(0),
_useState2 = (0, _slicedToArray2.default)(_useState, 2),
refresh = _useState2[0],
setRefresh = _useState2[1];
var registerMode = (0, _react.useRef)('ordered');
registerMode.current = 'ordered';
var registerRef = (0, _react.useCallback)(function (ref) {
if (menuItemRefs.current.includes(ref)) {
return;
}
switch (registerMode.current) {
case 'ordered':
menuItemRefs.current.push(ref);
break;
case 'unordered':
// Reset and force a rerender
registerMode.current = 'regenerate';
menuItemRefs.current = [];
setRefresh(refresh + 1);
break;
case 'regenerate':
// Ignore registrations until the next render cycle
break;
default:
throw new Error("Unexpected case of ".concat(registerMode.current));
}
},
// Updating register ref on force reload will cause `useRegisterItemWithFocusManager` to re-register
[refresh]);
var _useLayering = (0, _layering.useLayering)(),
isLayerDisabled = _useLayering.isLayerDisabled;
// Intentionally rebinding on each render
(0, _react.useEffect)(function () {
if (registerMode.current === 'ordered') {
// Use effect is called after rendering is complete and useEffects of the children a called first
registerMode.current = 'unordered';
}
});
(0, _react.useEffect)(function () {
return (0, _bindEventListener.bind)(window, {
type: 'keydown',
listener: (0, _handleFocus.default)(menuItemRefs, isLayerDisabled, onClose)
});
}, [isLayerDisabled, onClose]);
var contextValue = {
menuItemRefs: menuItemRefs.current,
registerRef: registerRef
};
return /*#__PURE__*/_react.default.createElement(FocusManagerContext.Provider, {
value: contextValue
}, children);
};
var _default = exports.default = FocusManager;