@mui/x-tree-view/internals/plugins/useTreeViewFocus/useTreeViewFocus.js

The community edition of the MUI X Tree View components.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useTreeViewFocus = void 0;
var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));
var _useEventCallback = _interopRequireDefault(require("@mui/utils/useEventCallback"));
var _useInstanceEventHandler = require("../../hooks/useInstanceEventHandler");
var _useTreeViewFocus = require("./useTreeViewFocus.selectors");
var _useTreeViewExpansion = require("../useTreeViewExpansion/useTreeViewExpansion.selectors");
var _useTreeViewItems = require("../useTreeViewItems/useTreeViewItems.selectors");
const useTreeViewFocus = ({
  instance,
  params,
  store
}) => {
  const setFocusedItemId = (0, _useEventCallback.default)(itemId => {
    store.update(prevState => {
      const focusedItemId = (0, _useTreeViewFocus.selectorFocusedItemId)(prevState);
      if (focusedItemId === itemId) {
        return prevState;
      }
      return (0, _extends2.default)({}, prevState, {
        focus: (0, _extends2.default)({}, prevState.focus, {
          focusedItemId: itemId
        })
      });
    });
  });
  const isItemVisible = itemId => {
    const itemMeta = (0, _useTreeViewItems.selectorItemMeta)(store.value, itemId);
    return itemMeta && (itemMeta.parentId == null || (0, _useTreeViewExpansion.selectorIsItemExpanded)(store.value, itemMeta.parentId));
  };
  const innerFocusItem = (event, itemId) => {
    const itemElement = instance.getItemDOMElement(itemId);
    if (itemElement) {
      itemElement.focus();
    }
    setFocusedItemId(itemId);
    if (params.onItemFocus) {
      params.onItemFocus(event, itemId);
    }
  };
  const focusItem = (0, _useEventCallback.default)((event, itemId) => {
    // If we receive an itemId, and it is visible, the focus will be set to it
    if (isItemVisible(itemId)) {
      innerFocusItem(event, itemId);
    }
  });
  const removeFocusedItem = (0, _useEventCallback.default)(() => {
    const focusedItemId = (0, _useTreeViewFocus.selectorFocusedItemId)(store.value);
    if (focusedItemId == null) {
      return;
    }
    const itemMeta = (0, _useTreeViewItems.selectorItemMeta)(store.value, focusedItemId);
    if (itemMeta) {
      const itemElement = instance.getItemDOMElement(focusedItemId);
      if (itemElement) {
        itemElement.blur();
      }
    }
    setFocusedItemId(null);
  });
  (0, _useInstanceEventHandler.useInstanceEventHandler)(instance, 'removeItem', ({
    id
  }) => {
    const focusedItemId = (0, _useTreeViewFocus.selectorFocusedItemId)(store.value);
    const defaultFocusableItemId = (0, _useTreeViewFocus.selectorDefaultFocusableItemId)(store.value);
    if (focusedItemId === id && defaultFocusableItemId != null) {
      innerFocusItem(null, defaultFocusableItemId);
    }
  });
  const createRootHandleFocus = otherHandlers => event => {
    otherHandlers.onFocus?.(event);
    if (event.defaultMuiPrevented) {
      return;
    }

    // if the event bubbled (which is React specific) we don't want to steal focus
    const defaultFocusableItemId = (0, _useTreeViewFocus.selectorDefaultFocusableItemId)(store.value);
    if (event.target === event.currentTarget && defaultFocusableItemId != null) {
      innerFocusItem(event, defaultFocusableItemId);
    }
  };
  const createRootHandleBlur = otherHandlers => event => {
    otherHandlers.onBlur?.(event);
    if (event.defaultMuiPrevented) {
      return;
    }
    setFocusedItemId(null);
  };
  return {
    getRootProps: otherHandlers => ({
      onFocus: createRootHandleFocus(otherHandlers),
      onBlur: createRootHandleBlur(otherHandlers)
    }),
    publicAPI: {
      focusItem
    },
    instance: {
      focusItem,
      removeFocusedItem
    }
  };
};
exports.useTreeViewFocus = useTreeViewFocus;
useTreeViewFocus.getInitialState = () => ({
  focus: {
    focusedItemId: null
  }
});
useTreeViewFocus.params = {
  onItemFocus: true
};