Enforce order for phrase query highlighter with slop

[dainiusjocas]

E.g. phrase "A B" with slop 2 will match the text "B A". But there are cases when we want that A must precede B, e.g. "A x x B".

Try out SpanNearQuery with flag inOrder .

[dainiusjocas]

Handle the case with one term phrase queries with slop and order