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Viewing file:     getNextDelimiterBlockKey.js (1.24 KB)      -rw-r--r--

"use strict";

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * 
 * @emails oncall+draft_js
 *
 * This is unstable and not part of the public API and should not be used by
 * production systems. This file may be update/removed without notice.
 */
var ContentBlockNode = require("./ContentBlockNode");

var getNextDelimiterBlockKey = function getNextDelimiterBlockKey(block, blockMap) {
  var isExperimentalTreeBlock = block instanceof ContentBlockNode;

  if (!isExperimentalTreeBlock) {
    return null;
  }

  var nextSiblingKey = block.getNextSiblingKey();

  if (nextSiblingKey) {
    return nextSiblingKey;
  }

  var parent = block.getParentKey();

  if (!parent) {
    return null;
  }

  var nextNonDescendantBlock = blockMap.get(parent);

  while (nextNonDescendantBlock && !nextNonDescendantBlock.getNextSiblingKey()) {
    var parentKey = nextNonDescendantBlock.getParentKey();
    nextNonDescendantBlock = parentKey ? blockMap.get(parentKey) : null;
  }

  if (!nextNonDescendantBlock) {
    return null;
  }

  return nextNonDescendantBlock.getNextSiblingKey();
};

module.exports = getNextDelimiterBlockKey;