notmuch/lib/thread-fp.h
David Bremner 5ad39ebf75 lib: add thread subqueries.
This change allows queries of the form

 thread:{from:me} and thread:{from:jian} and not thread:{from:dave}

This is still somewhat brute-force, but it's a big improvement over
both the shell script solution and the previous proposal [1], because it
does not build the whole thread structure just generate a
query. A further potential optimization is to replace the calls to
notmuch with more specialized Xapian code; in particular it's not
likely that reading all of the message metadata is a win here.

[1]: id:20170820213240.20526-1-david@tethera.net
2018-05-07 08:42:53 -03:00

42 lines
1.3 KiB
C++

/* thread-fp.h - thread field processor glue
*
* This file is part of notmuch.
*
* Copyright © 2018 David Bremner
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see https://www.gnu.org/licenses/ .
*
* Author: David Bremner <david@tethera.net>
*/
#ifndef NOTMUCH_THREAD_FP_H
#define NOTMUCH_THREAD_FP_H
#include <xapian.h>
#include "notmuch.h"
#if HAVE_XAPIAN_FIELD_PROCESSOR
class ThreadFieldProcessor : public Xapian::FieldProcessor {
protected:
Xapian::QueryParser &parser;
notmuch_database_t *notmuch;
public:
ThreadFieldProcessor (Xapian::QueryParser &parser_, notmuch_database_t *notmuch_)
: parser(parser_), notmuch(notmuch_) { };
Xapian::Query operator()(const std::string & str);
};
#endif
#endif /* NOTMUCH_THREAD_FP_H */