@wordpress/block-library/build/list-item/hooks/use-merge.js

Block library for the WordPress editor.

"use strict";
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// packages/block-library/src/list-item/hooks/use-merge.js
var use_merge_exports = {};
__export(use_merge_exports, {
  default: () => useMerge
});
module.exports = __toCommonJS(use_merge_exports);
var import_data = require("@wordpress/data");
var import_block_editor = require("@wordpress/block-editor");
var import_use_outdent_list_item = __toESM(require("./use-outdent-list-item"));
function useMerge(clientId, onMerge) {
  const registry = (0, import_data.useRegistry)();
  const {
    getPreviousBlockClientId,
    getNextBlockClientId,
    getBlockOrder,
    getBlockRootClientId,
    getBlockName
  } = (0, import_data.useSelect)(import_block_editor.store);
  const { mergeBlocks, moveBlocksToPosition } = (0, import_data.useDispatch)(import_block_editor.store);
  const outdentListItem = (0, import_use_outdent_list_item.default)();
  function getTrailingId(id) {
    const order = getBlockOrder(id);
    if (!order.length) {
      return id;
    }
    return getTrailingId(order[order.length - 1]);
  }
  function getParentListItemId(id) {
    const listId = getBlockRootClientId(id);
    const parentListItemId = getBlockRootClientId(listId);
    if (!parentListItemId) {
      return;
    }
    if (getBlockName(parentListItemId) !== "core/list-item") {
      return;
    }
    return parentListItemId;
  }
  function _getNextId(id) {
    const next = getNextBlockClientId(id);
    if (next) {
      return next;
    }
    const parentListItemId = getParentListItemId(id);
    if (!parentListItemId) {
      return;
    }
    return _getNextId(parentListItemId);
  }
  function getNextId(id) {
    const order = getBlockOrder(id);
    if (!order.length) {
      return _getNextId(id);
    }
    return getBlockOrder(order[0])[0];
  }
  return (forward) => {
    function mergeWithNested(clientIdA, clientIdB) {
      registry.batch(() => {
        const [nestedListClientId] = getBlockOrder(clientIdB);
        if (nestedListClientId) {
          if (getPreviousBlockClientId(clientIdB) === clientIdA && !getBlockOrder(clientIdA).length) {
            moveBlocksToPosition(
              [nestedListClientId],
              clientIdB,
              clientIdA
            );
          } else {
            moveBlocksToPosition(
              getBlockOrder(nestedListClientId),
              nestedListClientId,
              getBlockRootClientId(clientIdA)
            );
          }
        }
        mergeBlocks(clientIdA, clientIdB);
      });
    }
    if (forward) {
      const nextBlockClientId = getNextId(clientId);
      if (!nextBlockClientId) {
        onMerge(forward);
        return;
      }
      if (getParentListItemId(nextBlockClientId)) {
        outdentListItem(nextBlockClientId);
      } else {
        mergeWithNested(clientId, nextBlockClientId);
      }
    } else {
      const previousBlockClientId = getPreviousBlockClientId(clientId);
      if (getParentListItemId(clientId)) {
        outdentListItem(clientId);
      } else if (previousBlockClientId) {
        const trailingId = getTrailingId(previousBlockClientId);
        mergeWithNested(trailingId, clientId);
      } else {
        onMerge(forward);
      }
    }
  };
}
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