@atlaskit/modal-dialog/dist/cjs/internal/components/scroll-container.js

A modal dialog displays content that requires user interaction, in a layer above the page.

/* scroll-container.tsx generated by @compiled/babel-plugin v0.39.1 */
"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _typeof = require("@babel/runtime/helpers/typeof");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
require("./scroll-container.compiled.css");
var _runtime = require("@compiled/react/runtime");
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = _interopRequireWildcard(require("react"));
var _bindEventListener = require("bind-event-listener");
var _rafSchd = _interopRequireDefault(require("raf-schd"));
var _css = require("@atlaskit/css");
var _mergeRefs = _interopRequireDefault(require("@atlaskit/ds-lib/merge-refs"));
var _noop = _interopRequireDefault(require("@atlaskit/ds-lib/noop"));
var _useLazyCallback = _interopRequireDefault(require("@atlaskit/ds-lib/use-lazy-callback"));
var _compiled = require("@atlaskit/primitives/compiled");
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); }
var keylineColor = "var(--ds-border, #0B120E24)";
var styles = {
  base: "_kkes1kw7 _1e0c1kw7 _2lx21kw7 _16jlkb7n _6rthze3t _1pfhze3t _12l2ze3t _ahbqze3t _1reo15vq _18m91wug _1jykn7od _wzg61wug",
  topKeyline: "_mqm21uh4",
  bottomKeyline: "_179r1uh4"
};
var keylineHeight = 2;
/**
 * A container that shows top and bottom keylines when the
 * content overflows into the scrollable element.
 */
var ScrollContainer = /*#__PURE__*/(0, _react.forwardRef)(function (_ref, ref) {
  var testId = _ref.testId,
    children = _ref.children;
  var scrollableRef = (0, _react.useRef)(null);
  var _useState = (0, _react.useState)(false),
    _useState2 = (0, _slicedToArray2.default)(_useState, 2),
    showTopKeyline = _useState2[0],
    setTopKeyline = _useState2[1];
  var _useState3 = (0, _react.useState)(false),
    _useState4 = (0, _slicedToArray2.default)(_useState3, 2),
    showBottomKeyline = _useState4[0],
    setBottomKeyline = _useState4[1];
  var _useState5 = (0, _react.useState)(false),
    _useState6 = (0, _slicedToArray2.default)(_useState5, 2),
    showContentFocus = _useState6[0],
    setContentFocus = _useState6[1];

  // Schedule a content focus on the target element
  // WARNING: In theory, `target` may not be available when `rafSchedule` hits in concurrent rendering
  (0, _react.useEffect)(function () {
    var schedule = (0, _rafSchd.default)(function () {
      var target = scrollableRef.current;
      target && setContentFocus(target.scrollHeight > target.clientHeight);
    });
    schedule();
  }, [scrollableRef]);
  var setLazyKeylines = (0, _useLazyCallback.default)((0, _rafSchd.default)(function () {
    var target = scrollableRef.current;
    if (target) {
      var scrollableDistance = target.scrollHeight - target.clientHeight;
      if (target.previousElementSibling) {
        setTopKeyline(target.scrollTop > keylineHeight);
      }
      if (target.nextElementSibling) {
        setBottomKeyline(target.scrollTop <= scrollableDistance - keylineHeight);
      }
    }
  }));

  // On load (and scroll/resize events), we set "keylines"
  // these border the content to indicate scrollability when content underflows the header or footer
  (0, _react.useEffect)(function () {
    var target = scrollableRef.current;
    setLazyKeylines();
    var unbindWindowEvent = (0, _bindEventListener.bind)(window, {
      type: 'resize',
      listener: setLazyKeylines
    });
    var unbindTargetEvent = target ? (0, _bindEventListener.bind)(target, {
      type: 'scroll',
      listener: setLazyKeylines
    }) : _noop.default;
    return function () {
      unbindWindowEvent();
      unbindTargetEvent();
    };
  }, [setLazyKeylines]);
  return /*#__PURE__*/_react.default.createElement(_compiled.Focusable, {
    as: "div",
    isInset: true
    // tabindex is allowed here so that keyboard users can scroll content
    ,
    tabIndex: showContentFocus ? 0 : undefined,
    role: showContentFocus ? 'region' : undefined,
    "aria-label": showContentFocus ? 'Scrollable content' : undefined,
    testId: testId && "".concat(testId, "--scrollable"),
    ref: (0, _mergeRefs.default)([ref, scrollableRef]),
    xcss: (0, _css.cx)(styles.base, showTopKeyline && styles.topKeyline, showBottomKeyline && styles.bottomKeyline)
  }, children);
});
ScrollContainer.displayName = 'ScrollContainer';
var _default = exports.default = ScrollContainer;