dsmiley 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_r361476978
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File path:
lucene/highlighter/src/java/org/apache/lucene/search/uhighlight/FieldHighlighter.java
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@@ -159,8 +160,9 @@ public Object highlightFieldForDoc(LeafReader reader, int
docId, String content)
break;
}
// advance breakIterator
- passage.setStartOffset(Math.max(this.breakIterator.preceding(start +
1), 0));
- passage.setEndOffset(Math.min(this.breakIterator.following(start),
contentLength));
+ passage.setStartOffset(Math.max(this.breakIterator.preceding(start +
1), lastPassageEnd));
+ lastPassageEnd = Math.min(this.breakIterator.following(start),
contentLength);
Review comment:
What I'm about to propose is perhaps technically out of scope but can you
please call `following` with the variable `end` minus 1?
Do you think we might need to guard the passage end offset by ensuring it is
> the start offset? start might theoretically be before lastPassageEnd I
think; if it wasn't possible then you wouldn't have guarded that with
`max(...,lastPassageEnd)`
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