FastVectorHighlighter truncates words at beginning and end of fragments
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Key: LUCENE-1824
URL: https://issues.apache.org/jira/browse/LUCENE-1824
Project: Lucene - Java
Issue Type: Improvement
Components: contrib/*
Environment: any
Reporter: Alex Vigdor
Priority: Minor
Fix For: 2.9
Attachments: LUCENE-1824.patch
FastVectorHighlighter does not take word boundaries into consideration when
building fragments, so that in most cases the first and last word of a fragment
are truncated. This makes the highlights less legible than they should be. I
will attach a patch to BaseFragmentBuilder that resolves this by expanding the
start and end boundaries of the fragment to the first whitespace character on
either side of the fragment, or the beginning or end of the source text,
whichever comes first. This significantly improves legibility, at the cost of
returning a slightly larger number of characters than specified for the
fragment size.
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