@atlaskit/dropdown-menu/dist/es2019/dropdown-menu-top-layer.js

A dropdown menu displays a list of actions or options to a user.

/* dropdown-menu-top-layer.tsx generated by @compiled/babel-plugin v2.0.0 */
import _extends from "@babel/runtime/helpers/extends";
import "./dropdown-menu-top-layer.compiled.css";
import * as React from 'react';
import { ax, ix } from "@compiled/react/runtime";
import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
import { bind } from 'bind-event-listener';
import Button from '@atlaskit/button/new';
import { KEY_DOWN, KEY_ENTER, KEY_SPACE } from '@atlaskit/ds-lib/keycodes';
import mergeRefs from '@atlaskit/ds-lib/merge-refs';
import noop from '@atlaskit/ds-lib/noop';
import useControlledState from '@atlaskit/ds-lib/use-controlled';
import useFocus from '@atlaskit/ds-lib/use-focus-event';
import ExpandIcon from '@atlaskit/icon/core/chevron-down';
import MenuGroup from '@atlaskit/menu/menu-group';
import Spinner from '@atlaskit/spinner';
import { getFirstFocusable } from '@atlaskit/top-layer/focus';
import { getAriaForTrigger } from '@atlaskit/top-layer/get-aria-for-trigger';
import { fromLegacyPlacement } from '@atlaskit/top-layer/placement-map';
import { Popover } from '@atlaskit/top-layer/popover';
import { useAnchorPosition } from '@atlaskit/top-layer/use-anchor-position';
import { isAtCurrentMenuLevel, useArrowNavigation } from '@atlaskit/top-layer/use-arrow-navigation';
import { usePopoverId } from '@atlaskit/top-layer/use-popover-id';
import { useWidthFromAnchor } from '@atlaskit/top-layer/use-width-from-anchor';
import SelectionStore from './internal/context/selection-store';
const MAX_HEIGHT = `calc(100vh - 16px)`;
const styles = {
  spinnerContainer: "_1e0c1txw _1ul91lit _1bah1h6o _1q51v47k _y4tiv47k _85i5v47k _bozgv47k",
  menuContent: "_2rkofajl _bfhk1bhr _16qs130s"
};

/**
 * Event types produced by trigger interactions.
 *
 * - `React.MouseEvent<Element>`: from the trigger's `onClick` handler
 * - `React.KeyboardEvent<Element>`: from the trigger's `onClick` when activated via keyboard
 * - `KeyboardEvent`: native event from the ArrowDown `bind(window, ...)` listener
 */

/**
 * Determines whether a trigger interaction was keyboard-initiated.
 *
 * Keyboard signals:
 * - `type === 'keydown'` (native KeyboardEvent from ArrowDown handler)
 * - `clientX/clientY === 0` (assistive technology click)
 * - `detail === 0` (keyboard-activated click via Enter/Space)
 */
function isKeyboardTriggered(event) {
  if (event.type === 'keydown') {
    return true;
  }
  if ('clientX' in event && (event.clientX === 0 || event.clientY === 0)) {
    return true;
  }
  if (event.detail === 0) {
    return true;
  }
  return false;
}

/**
 * Loading indicator for the dropdown menu.
 */
function LoadingIndicator({
  statusLabel = 'Loading',
  testId
}) {
  return /*#__PURE__*/React.createElement("div", {
    role: "menuitem",
    className: ax([styles.spinnerContainer])
  }, /*#__PURE__*/React.createElement(Spinner, {
    size: "small",
    label: statusLabel,
    testId: testId
  }));
}

/**
 * Top-layer implementation of DropdownMenu.
 *
 * Replaces the legacy `@atlaskit/popup` + `@atlaskit/portal` + `@atlaskit/layering` pipeline
 * with the native Popover API via `@atlaskit/top-layer`.
 *
 * What is no longer needed:
 * - Portal: top layer handles stacking natively
 * - FocusLock / react-focus-lock: popover=auto provides light dismiss
 * - z-index: top layer is always above everything
 * - FocusManager (ref registration): replaced by DOM-query-based `useArrowNavigation`
 * - handle-focus.tsx: replaced by `useArrowNavigation`
 * - Layering context: top layer nesting is handled by the browser
 * - Fallback placements / Popper: CSS Anchor Positioning handles positioning
 */
function DropdownMenuTopLayer({
  autoFocus = false,
  children,
  defaultOpen = false,
  isLoading = false,
  isOpen: isOpenProp,
  onOpenChange = noop,
  placement = 'bottom-start',
  shouldFitContainer = false,
  returnFocusRef,
  spacing,
  statusLabel,
  testId,
  trigger,
  label,
  interactionName,
  menuLabel
}) {
  var _ref;
  const [isLocalOpen, setLocalIsOpen] = useControlledState(isOpenProp, () => defaultOpen);
  const triggerRef = useRef(null);
  const popoverRef = useRef(null);
  const menuRef = useRef(null);
  const [isTriggeredUsingKeyboard, setTriggeredUsingKeyboard] = useState(false);
  const popoverId = usePopoverId();
  const topLayerPlacement = useMemo(() => fromLegacyPlacement({
    legacy: placement
  }), [placement]);
  useAnchorPosition({
    anchorRef: triggerRef,
    popoverRef,
    placement: topLayerPlacement,
    isOpen: isLocalOpen
  });
  useWidthFromAnchor({
    mode: shouldFitContainer ? 'min-anchor' : 'none',
    popoverRef,
    anchorRef: triggerRef,
    isOpen: isLocalOpen
  });

  // Close handling.
  // Focus restoration is handled natively by the Popover API:
  //   - Escape: browser restores focus to the trigger automatically
  //   - Click-outside: browser does NOT restore (correct behavior)
  //
  // The only custom focus handling needed is `returnFocusRef`: when provided,
  // we redirect focus to a different element than the trigger. We do this
  // in the onClose callback via rAF, which runs after the browser's native
  // restoration, effectively overriding it.
  const handleOnClose = useCallback(({
    reason: _reason
  }) => {
    if (returnFocusRef) {
      requestAnimationFrame(() => {
        var _returnFocusRef$curre;
        (_returnFocusRef$curre = returnFocusRef.current) === null || _returnFocusRef$curre === void 0 ? void 0 : _returnFocusRef$curre.focus();
      });
    }
    setLocalIsOpen(false);
    onOpenChange({
      isOpen: false,
      event: null
    });
  }, [onOpenChange, returnFocusRef, setLocalIsOpen]);

  // Trigger click handling.
  const handleTriggerClicked = useCallback(event => {
    const newValue = !isLocalOpen;
    setTriggeredUsingKeyboard(isKeyboardTriggered(event));
    setLocalIsOpen(newValue);

    // Extract the native DOM event for onOpenChange
    const nativeEvent = 'nativeEvent' in event ? event.nativeEvent : event;
    onOpenChange({
      isOpen: newValue,
      event: nativeEvent
    });
  }, [isLocalOpen, setLocalIsOpen, onOpenChange]);
  const {
    isFocused,
    bindFocus
  } = useFocus();

  // When trigger is focused, open dropdown on ArrowDown (top-level only).
  // Per WAI-ARIA, ArrowDown opens a menu from a menubar/button trigger,
  // but inside a vertical submenu, ArrowDown navigates between siblings
  // and ArrowRight opens nested menus instead.
  useEffect(() => {
    var _triggerRef$current;
    if (!isFocused || isLocalOpen) {
      return noop;
    }

    // Do not open on ArrowDown if this trigger is inside a parent menu.
    // Nested menus should only be opened via ArrowRight or Enter.
    const isNestedTrigger = ((_triggerRef$current = triggerRef.current) === null || _triggerRef$current === void 0 ? void 0 : _triggerRef$current.closest('[role="menu"]')) != null;
    return bind(window, {
      type: 'keydown',
      listener: function openOnKeyDown(e) {
        if (e.key === KEY_DOWN && !isNestedTrigger) {
          e.preventDefault();
          handleTriggerClicked(e);
        } else if ((e.code === KEY_SPACE || e.key === KEY_ENTER) && e.detail === 0) {
          setTriggeredUsingKeyboard(true);
        }
      }
    });
  }, [isFocused, isLocalOpen, handleTriggerClicked]);

  // Arrow navigation.
  // useArrowNavigation handles ArrowUp/Down, Home/End, and Tab-to-close
  // by querying focusable elements in the menu DOM container.
  const handleArrowClose = useCallback(() => {
    handleOnClose({
      reason: 'escape'
    });
  }, [handleOnClose]);
  const handleNestedOpen = useCallback(({
    trigger
  }) => {
    trigger.click();
  }, []);
  const handleNestedClose = useCallback(() => {
    handleOnClose({
      reason: 'escape'
    });
  }, [handleOnClose]);
  useArrowNavigation({
    containerRef: menuRef,
    onClose: handleArrowClose,
    onNestedOpen: handleNestedOpen,
    onNestedClose: handleNestedClose,
    isEnabled: isLocalOpen,
    filter: isAtCurrentMenuLevel
  });

  // Auto-focus first item on open.
  useEffect(() => {
    if (!isLocalOpen || !isTriggeredUsingKeyboard && !autoFocus) {
      return;
    }
    requestAnimationFrame(() => {
      const menu = menuRef.current;
      if (!menu) {
        return;
      }
      const firstItem = getFirstFocusable({
        container: menu
      });
      firstItem === null || firstItem === void 0 ? void 0 : firstItem.focus();
    });
  }, [isLocalOpen, isTriggeredUsingKeyboard, autoFocus]);

  // Close on menu item click.
  // Close when a regular menuitem is clicked, but not checkboxes/radios
  // and not nested triggers (items with aria-haspopup).
  const handleMenuClick = useCallback(e => {
    var _target$closest;
    const target = e.target;
    const menuItem = (_target$closest = target.closest) === null || _target$closest === void 0 ? void 0 : _target$closest.call(target, '[role="menuitem"], [role="menuitemcheckbox"], [role="menuitemradio"]');
    if (!menuItem) {
      return;
    }
    const isCheckboxOrRadio = menuItem.getAttribute('role') === 'menuitemcheckbox' || menuItem.getAttribute('role') === 'menuitemradio';
    // Do not close the menu when clicking a nested trigger (aria-haspopup).
    // The nested dropdown will handle its own open/close.
    const isNestedTrigger = menuItem.hasAttribute('aria-haspopup');
    if (!isCheckboxOrRadio && !isNestedTrigger) {
      setLocalIsOpen(false);
      onOpenChange({
        isOpen: false,
        event: e.nativeEvent
      });
    }
  }, [setLocalIsOpen, onOpenChange]);
  const ariaAttributes = getAriaForTrigger({
    role: 'menu',
    isOpen: isLocalOpen,
    popoverId
  });

  // FUDGE(top-layer-api): cast `aria-haspopup` to the narrow shape that adopter
  // public types expect. `@atlaskit/top-layer` types `aria-haspopup` as the wider
  // WAI-ARIA union, but the public `CustomTriggerProps` (extending `@atlaskit/popup`
  // `TriggerProps`) is intentionally kept narrow (`boolean | 'dialog'`) because the
  // top-layer API surface is not yet settled. The runtime value is unchanged; only
  // the TypeScript-visible type is narrowed at this boundary.
  const narrowAriaAttributes = ariaAttributes;
  const renderTrigger = () => {
    const setRef = node => {
      triggerRef.current = node;
    };
    const combinedRef = mergeRefs([setRef]);
    if (typeof trigger === 'function') {
      return trigger({
        ...narrowAriaAttributes,
        ...bindFocus,
        triggerRef: combinedRef,
        isSelected: isLocalOpen,
        onClick: handleTriggerClicked,
        testId: testId && `${testId}--trigger`
      });
    }
    return /*#__PURE__*/React.createElement(Button, _extends({}, bindFocus, {
      ref: combinedRef
    }, narrowAriaAttributes, {
      isSelected: isLocalOpen,
      iconAfter: iconProps => /*#__PURE__*/React.createElement(ExpandIcon, _extends({}, iconProps, {
        size: "small"
      })),
      onClick: handleTriggerClicked,
      testId: testId && `${testId}--trigger`,
      "aria-label": label,
      interactionName: interactionName
    }), trigger);
  };
  return /*#__PURE__*/React.createElement(SelectionStore, null, renderTrigger(), /*#__PURE__*/React.createElement(Popover, {
    ref: popoverRef,
    id: popoverId,
    role: "menu",
    label: (_ref = menuLabel !== null && menuLabel !== void 0 ? menuLabel : label) !== null && _ref !== void 0 ? _ref : typeof trigger === 'string' ? trigger : 'Menu',
    isOpen: isLocalOpen,
    onClose: handleOnClose,
    shouldAnimate: true,
    placement: topLayerPlacement,
    testId: testId && `${testId}--content`
  }, /*#__PURE__*/React.createElement("div", {
    ref: menuRef,
    className: ax([styles.menuContent])
  }, /*#__PURE__*/React.createElement(MenuGroup, {
    isLoading: isLoading,
    maxHeight: MAX_HEIGHT,
    maxWidth: shouldFitContainer ? undefined : 800,
    onClick: handleMenuClick,
    role: "menu",
    spacing: spacing,
    testId: testId && `${testId}--menu-wrapper--menu-group`,
    menuLabel: menuLabel
  }, isLoading ? /*#__PURE__*/React.createElement(LoadingIndicator, {
    statusLabel: statusLabel,
    testId: testId && `${testId}--menu-wrapper--loading-indicator`
  }) : children))));
}
export default DropdownMenuTopLayer;