custom-app/dhcc-app-dll/node_modules/draft-js/lib/encodeEntityRanges.js.flow

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/**
 * Copyright (c) 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @providesModule encodeEntityRanges
 * @format
 * @flow
 */

'use strict';

import type { BlockNodeRecord } from './BlockNodeRecord';
import type { EntityRange } from './EntityRange';

var DraftStringKey = require('./DraftStringKey');
var UnicodeUtils = require('fbjs/lib/UnicodeUtils');

var { strlen } = UnicodeUtils;

/**
 * Convert to UTF-8 character counts for storage.
 */
function encodeEntityRanges(block: BlockNodeRecord, storageMap: Object): Array<EntityRange> {
  var encoded = [];
  block.findEntityRanges(character => !!character.getEntity(), ( /*number*/start, /*number*/end) => {
    var text = block.getText();
    var key = block.getEntityAt(start);
    encoded.push({
      offset: strlen(text.slice(0, start)),
      length: strlen(text.slice(start, end)),
      // Encode the key as a number for range storage.
      key: Number(storageMap[DraftStringKey.stringify(key)])
    });
  });
  return encoded;
}

module.exports = encodeEntityRanges;