Traktormaster commented on a change in pull request #1123: LUCENE-9093: Unified
highlighter with word separator never gives context to the left
URL: https://github.com/apache/lucene-solr/pull/1123#discussion_r361480642
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File path:
lucene/highlighter/src/java/org/apache/lucene/search/uhighlight/LengthGoalBreakIterator.java
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@@ -174,7 +175,48 @@ private int moveToBreak(int idx) { // precondition: idx
is a known break
// called at start of new Passage given first word start offset
@Override
public int preceding(int offset) {
- return baseIter.preceding(offset); // no change needed
+ final int fragmentStart = Math.max(baseIter.preceding(offset), 0); //
convert DONE to 0
+ fragmentEndFromPreceding = baseIter.following(fragmentStart);
Review comment:
AH I see! I somehow misinterpreted your question. You're mostly correct. The
`baseIter.following(fragmentStart)` should be `baseIter.following(offset - 1)`.
The minus one is needed for the very unlikely edge case where the match is a
single character and the user requests the absolute minimal length for
highlight. I added a little test that checks for that, you can see for yourself.
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