39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule decodeEntityRanges
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* @format
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* @flow
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*/
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'use strict';
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var UnicodeUtils = require('fbjs/lib/UnicodeUtils');
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var { substr } = UnicodeUtils;
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/**
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* Convert to native JavaScript string lengths to determine ranges.
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*/
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function decodeEntityRanges(text: string, ranges: Array<Object>): Array<?string> {
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var entities = Array(text.length).fill(null);
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if (ranges) {
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ranges.forEach(range => {
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// Using Unicode-enabled substrings converted to JavaScript lengths,
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// fill the output array with entity keys.
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var start = substr(text, 0, range.offset).length;
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var end = start + substr(text, range.offset, range.length).length;
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for (var ii = start; ii < end; ii++) {
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entities[ii] = range.key;
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}
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});
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}
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return entities;
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}
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module.exports = decodeEntityRanges; |