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