@mui/base/useTab/useTab.js

import _extends from "@babel/runtime/helpers/esm/extends";
import * as React from 'react';
import { unstable_useId as useId, unstable_useForkRef as useForkRef } from '@mui/utils';
import { useTabsContext } from '../Tabs';
import { useCompoundItem } from '../utils/useCompoundItem';
import { useListItem } from '../useList';
import useButton from '../useButton';
function tabValueGenerator(otherTabValues) {
  return otherTabValues.size;
}

/**
 *
 * Demos:
 *
 * - [Tabs](https://mui.com/base/react-tabs/#hooks)
 *
 * API:
 *
 * - [useTab API](https://mui.com/base/react-tabs/hooks-api/#use-tab)
 */
function useTab(parameters) {
  const {
    value: valueParam,
    rootRef: externalRef,
    disabled = false,
    id: idParam
  } = parameters;
  const tabRef = React.useRef(null);
  const id = useId(idParam);
  const {
    value: selectedValue,
    selectionFollowsFocus,
    getTabPanelId
  } = useTabsContext();
  const tabMetadata = React.useMemo(() => ({
    disabled,
    ref: tabRef,
    id
  }), [disabled, tabRef, id]);
  const {
    id: value,
    index,
    totalItemCount: totalTabsCount
  } = useCompoundItem(valueParam != null ? valueParam : tabValueGenerator, tabMetadata);
  const {
    getRootProps: getTabProps,
    rootRef: listItemRefHandler,
    highlighted,
    selected
  } = useListItem({
    item: value
  });
  const {
    getRootProps: getButtonProps,
    rootRef: buttonRefHandler,
    active,
    focusVisible,
    setFocusVisible
  } = useButton({
    disabled,
    focusableWhenDisabled: !selectionFollowsFocus,
    type: 'button'
  });
  const handleRef = useForkRef(tabRef, externalRef, listItemRefHandler, buttonRefHandler);
  const tabPanelId = value !== undefined ? getTabPanelId(value) : undefined;
  const getRootProps = (otherHandlers = {}) => {
    const resolvedTabProps = _extends({}, otherHandlers, getTabProps(otherHandlers));
    const resolvedButtonProps = _extends({}, resolvedTabProps, getButtonProps(resolvedTabProps));
    return _extends({}, resolvedButtonProps, {
      role: 'tab',
      'aria-controls': tabPanelId,
      'aria-selected': selected,
      id,
      ref: handleRef
    });
  };
  return {
    getRootProps,
    active,
    focusVisible,
    highlighted,
    index,
    rootRef: handleRef,
    // the `selected` state isn't set on the server (it relies on effects to be calculated),
    // so we fall back to checking the `value` prop with the selectedValue from the TabsContext
    selected: selected || value === selectedValue,
    setFocusVisible,
    totalTabsCount
  };
}
export default useTab;