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lib: Rearrange the exclude code in query.cc

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Slightly refactor the exclude code to give the callers access to the
exclude query itself. There should be no functional change.
This commit is contained in:
Mark Walters 2012-03-01 22:30:36 +00:00 committed by David Bremner
parent 98f5b0f09a
commit 08f7b026a9
1 changed files with 19 additions and 10 deletions
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29
lib/query.cc
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@ -122,12 +122,15 @@ _notmuch_messages_destructor (notmuch_mset_messages_t *messages)
return 0;
}
/* Return a query that does not match messages with the excluded tags
* registered with the query. Any tags that explicitly appear in
* xquery will not be excluded. */
/* Return a query that matches messages with the excluded tags
* registered with query. Any tags that explicitly appear in xquery
* will not be excluded. The caller of this function has to combine
* the returned query appropriately.*/
static Xapian::Query
_notmuch_exclude_tags (notmuch_query_t *query, Xapian::Query xquery)
{
Xapian::Query exclude_query = Xapian::Query::MatchNothing;
for (notmuch_string_node_t *term = query->exclude_terms->head; term;
term = term->next) {
Xapian::TermIterator it = xquery.get_terms_begin ();
@ -137,10 +140,10 @@ _notmuch_exclude_tags (notmuch_query_t *query, Xapian::Query xquery)
break;
}
if (it == end)
xquery = Xapian::Query (Xapian::Query::OP_AND_NOT,
xquery, Xapian::Query (term->string));
exclude_query = Xapian::Query (Xapian::Query::OP_OR,
exclude_query, Xapian::Query (term->string));
}
return xquery;
return exclude_query;
}
notmuch_messages_t *
@ -168,7 +171,7 @@ notmuch_query_search_messages (notmuch_query_t *query)
Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
_find_prefix ("type"),
"mail"));
Xapian::Query string_query, final_query;
Xapian::Query string_query, final_query, exclude_query;
Xapian::MSet mset;
unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
Xapian::QueryParser::FLAG_PHRASE |
@ -188,7 +191,10 @@ notmuch_query_search_messages (notmuch_query_t *query)
mail_query, string_query);
}
final_query = _notmuch_exclude_tags (query, final_query);
exclude_query = _notmuch_exclude_tags (query, final_query);
final_query = Xapian::Query (Xapian::Query::OP_AND_NOT,
final_query, exclude_query);
enquire.set_weighting_scheme (Xapian::BoolWeight());
@ -449,7 +455,7 @@ notmuch_query_count_messages (notmuch_query_t *query)
Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
_find_prefix ("type"),
"mail"));
Xapian::Query string_query, final_query;
Xapian::Query string_query, final_query, exclude_query;
Xapian::MSet mset;
unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
Xapian::QueryParser::FLAG_PHRASE |
@ -469,7 +475,10 @@ notmuch_query_count_messages (notmuch_query_t *query)
mail_query, string_query);
}
final_query = _notmuch_exclude_tags (query, final_query);
exclude_query = _notmuch_exclude_tags (query, final_query);
final_query = Xapian::Query (Xapian::Query::OP_AND_NOT,
final_query, exclude_query);
enquire.set_weighting_scheme(Xapian::BoolWeight());
enquire.set_docid_order(Xapian::Enquire::ASCENDING);