36 lines
892 B
JavaScript
36 lines
892 B
JavaScript
"use strict";
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// Create plain text entries corresponding to areas of the text that match no
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// existing entries. Returns an empty array if all parts of the text have been
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// parsed into recognizable entries already.
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function fill(existingEntries, text) {
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let position = 0;
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// Fill inner parts of the text. For example, if text is `foobarbaz` and both
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// `foo` and `baz` have matched into an entry, this will return a dummy entry
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// corresponding to `bar`.
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const result = existingEntries.reduce((acc, textSegment) => {
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if (textSegment.start > position) {
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acc.push({
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start: position,
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end: textSegment.start,
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});
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}
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position = textSegment.end;
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return acc;
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}, []);
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// Complete the unmatched end of the text with a dummy entry
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if (position < text.length) {
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result.push({
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start: position,
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end: text.length,
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});
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}
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return result;
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}
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export default fill;
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