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

Block library for the WordPress editor.

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
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 __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_blocks = require("@wordpress/blocks");
var import_utils = require("../utils.cjs");
function useMerge(clientId, onMerge) {
  const registry = (0, import_data.useRegistry)();
  return (forward) => {
    const select = registry.select(import_block_editor.store);
    const {
      getPreviousBlockClientId,
      getNextBlockClientId,
      getBlockOrder,
      getBlockIndex,
      getBlockRootClientId,
      getBlockName,
      getBlock
    } = select;
    const { mergeBlocks, moveBlocksToPosition, removeBlock, insertBlocks } = registry.dispatch(import_block_editor.store);
    function getTrailingId(id) {
      const order = getBlockOrder(id);
      if (!order.length) {
        return id;
      }
      return getTrailingId(order[order.length - 1]);
    }
    function mergeWithNested(clientIdA, clientIdB) {
      registry.batch(() => {
        const [nestedListClientId] = getBlockOrder(clientIdB);
        if (nestedListClientId) {
          if (getPreviousBlockClientId(clientIdB) === clientIdA && !getBlockOrder(clientIdA).length) {
            moveBlocksToPosition(
              [nestedListClientId],
              clientIdB,
              clientIdA
            );
          } else if ((0, import_utils.getOutdentTarget)(select, clientIdB) === clientIdA) {
            moveBlocksToPosition(
              getBlockOrder(nestedListClientId),
              nestedListClientId,
              getBlockRootClientId(clientIdB),
              getBlockIndex(clientIdB) + 1
            );
          } else {
            moveBlocksToPosition(
              getBlockOrder(nestedListClientId),
              nestedListClientId,
              getBlockRootClientId(clientIdA)
            );
          }
        }
        const listId = getBlockRootClientId(clientIdB);
        mergeBlocks(clientIdA, clientIdB);
        if (!getBlockOrder(listId).length) {
          removeBlock(listId, false);
        }
      });
    }
    if (forward) {
      const innerListId = getBlockOrder(clientId)[0];
      let nextBlockClientId;
      let listItemId = clientId;
      if (innerListId) {
        nextBlockClientId = getBlockOrder(innerListId)[0];
      } else {
        while (!(nextBlockClientId = getNextBlockClientId(listItemId))) {
          const parentLi = (0, import_utils.getOutdentTarget)(select, listItemId);
          if (!parentLi) {
            break;
          }
          listItemId = parentLi;
        }
      }
      if (!nextBlockClientId) {
        const outerListId = getBlockRootClientId(listItemId);
        const followingBlockId = getNextBlockClientId(outerListId);
        if (followingBlockId) {
          if (getBlockName(followingBlockId) === "core/list") {
            registry.batch(() => {
              moveBlocksToPosition(
                getBlockOrder(followingBlockId),
                followingBlockId,
                outerListId
              );
              removeBlock(followingBlockId, false);
            });
          } else {
            const transformed = (0, import_blocks.switchToBlockType)(
              getBlock(followingBlockId),
              "core/list"
            );
            const newInnerBlocks = transformed?.[0]?.innerBlocks;
            if (newInnerBlocks?.length) {
              registry.batch(() => {
                insertBlocks(
                  newInnerBlocks,
                  void 0,
                  outerListId,
                  false
                );
                removeBlock(followingBlockId, false);
              });
            }
          }
        }
      } else {
        mergeWithNested(clientId, nextBlockClientId);
      }
    } else {
      const previousBlockClientId = getPreviousBlockClientId(clientId);
      if (previousBlockClientId) {
        const trailingId = getTrailingId(previousBlockClientId);
        mergeWithNested(trailingId, clientId);
        return;
      }
      const parentListItemId = (0, import_utils.getOutdentTarget)(select, clientId);
      if (parentListItemId) {
        mergeWithNested(parentListItemId, clientId);
        return;
      }
      const blockOrder = getBlockOrder(clientId);
      if ((0, import_blocks.isUnmodifiedBlock)(getBlock(clientId), "content") && blockOrder.length > 0) {
        registry.batch(() => {
          (0, import_utils.outdentListItems)(
            registry,
            getBlockOrder(blockOrder[0])
          );
          removeBlock(clientId, true);
        });
      } else {
        onMerge(forward);
      }
    }
  };
}
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