X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fquery.cc;h=ab18fbc6124d1c573741a9ebc7ac2dbb77b65086;hp=6f02b04b95dc81def0c240a055b95ea7917153b8;hb=8c175aa1208857b40dc7a49d6d924344818b8122;hpb=d5523ead90b6be2b07d4af745b8ed9b980a6b9f1

diff --git a/lib/query.cc b/lib/query.cc
index 6f02b04b..ab18fbc6 100644
--- a/lib/query.cc
+++ b/lib/query.cc
@@ -27,6 +27,8 @@ struct _notmuch_query {
     notmuch_database_t *notmuch;
     const char *query_string;
     notmuch_sort_t sort;
+    notmuch_string_list_t *exclude_terms;
+    notmuch_bool_t omit_excluded_messages;
 };
 
 typedef struct _notmuch_mset_messages {
@@ -56,6 +58,12 @@ struct visible _notmuch_threads {
     notmuch_doc_id_set_t match_set;
 };
 
+/* We need this in the message functions so forward declare. */
+static notmuch_bool_t
+_notmuch_doc_id_set_init (void *ctx,
+			  notmuch_doc_id_set_t *doc_ids,
+			  GArray *arr);
+
 notmuch_query_t *
 notmuch_query_create (notmuch_database_t *notmuch,
 		      const char *query_string)
@@ -76,6 +84,10 @@ notmuch_query_create (notmuch_database_t *notmuch,
 
     query->sort = NOTMUCH_SORT_NEWEST_FIRST;
 
+    query->exclude_terms = _notmuch_string_list_create (query);
+
+    query->omit_excluded_messages = FALSE;
+
     return query;
 }
 
@@ -85,6 +97,12 @@ notmuch_query_get_query_string (notmuch_query_t *query)
     return query->query_string;
 }
 
+void
+notmuch_query_set_omit_excluded_messages (notmuch_query_t *query, notmuch_bool_t omit)
+{
+    query->omit_excluded_messages = omit;
+}
+
 void
 notmuch_query_set_sort (notmuch_query_t *query, notmuch_sort_t sort)
 {
@@ -97,6 +115,13 @@ notmuch_query_get_sort (notmuch_query_t *query)
     return query->sort;
 }
 
+void
+notmuch_query_add_tag_exclude (notmuch_query_t *query, const char *tag)
+{
+    char *term = talloc_asprintf (query, "%s%s", _find_prefix ("tag"), tag);
+    _notmuch_string_list_append (query->exclude_terms, term);
+}
+
 /* We end up having to call the destructors explicitly because we had
  * to use "placement new" in order to initialize C++ objects within a
  * block that we allocated with talloc. So C++ is making talloc
@@ -112,6 +137,33 @@ _notmuch_messages_destructor (notmuch_mset_messages_t *messages)
     return 0;
 }
 
+/* Return a query that matches messages with the excluded tags
+ * registered with query.  Any tags that explicitly appear in xquery
+ * will not be excluded, and will be removed from the list of exclude
+ * tags.  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 ();
+	Xapian::TermIterator end = xquery.get_terms_end ();
+	for (; it != end; it++) {
+	    if ((*it).compare (term->string) == 0)
+		break;
+	}
+	if (it == end)
+	    exclude_query = Xapian::Query (Xapian::Query::OP_OR,
+				    exclude_query, Xapian::Query (term->string));
+	else
+	    term->string = talloc_strdup (query, "");
+    }
+    return exclude_query;
+}
+
 notmuch_messages_t *
 notmuch_query_search_messages (notmuch_query_t *query)
 {
@@ -137,8 +189,9 @@ 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;
+	Xapian::MSetIterator iterator;
 	unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
 			      Xapian::QueryParser::FLAG_PHRASE |
 			      Xapian::QueryParser::FLAG_LOVEHATE |
@@ -156,6 +209,35 @@ notmuch_query_search_messages (notmuch_query_t *query)
 	    final_query = Xapian::Query (Xapian::Query::OP_AND,
 					 mail_query, string_query);
 	}
+	messages->base.excluded_doc_ids = NULL;
+
+	if (query->exclude_terms) {
+	    exclude_query = _notmuch_exclude_tags (query, final_query);
+	    exclude_query = Xapian::Query (Xapian::Query::OP_AND,
+					   exclude_query, final_query);
+
+	    if (query->omit_excluded_messages)
+		final_query = Xapian::Query (Xapian::Query::OP_AND_NOT,
+					     final_query, exclude_query);
+	    else {
+		enquire.set_weighting_scheme (Xapian::BoolWeight());
+		enquire.set_query (exclude_query);
+
+		mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount ());
+
+		GArray *excluded_doc_ids = g_array_new (FALSE, FALSE, sizeof (unsigned int));
+
+		for (iterator = mset.begin (); iterator != mset.end (); iterator++) {
+		    unsigned int doc_id = *iterator;
+		    g_array_append_val (excluded_doc_ids, doc_id);
+		}
+		messages->base.excluded_doc_ids = talloc (messages, _notmuch_doc_id_set);
+		_notmuch_doc_id_set_init (query, messages->base.excluded_doc_ids,
+					  excluded_doc_ids);
+		g_array_unref (excluded_doc_ids);
+	    }
+	}
+
 
 	enquire.set_weighting_scheme (Xapian::BoolWeight());
 
@@ -244,6 +326,10 @@ _notmuch_mset_messages_get (notmuch_messages_t *messages)
 	INTERNAL_ERROR ("a messages iterator contains a non-existent document ID.\n");
     }
 
+    if (messages->excluded_doc_ids &&
+	_notmuch_doc_id_set_contains (messages->excluded_doc_ids, doc_id))
+	notmuch_message_set_flag (message, NOTMUCH_MESSAGE_FLAG_EXCLUDED, TRUE);
+
     return message;
 }
 
@@ -389,6 +475,7 @@ notmuch_threads_get (notmuch_threads_t *threads)
 				   threads->query->notmuch,
 				   doc_id,
 				   &threads->match_set,
+				   threads->query->exclude_terms,
 				   threads->query->sort);
 }
 
@@ -416,7 +503,7 @@ 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 |
@@ -436,6 +523,11 @@ notmuch_query_count_messages (notmuch_query_t *query)
 					 mail_query, string_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);
 
@@ -457,3 +549,47 @@ notmuch_query_count_messages (notmuch_query_t *query)
 
     return count;
 }
+
+unsigned
+notmuch_query_count_threads (notmuch_query_t *query)
+{
+    notmuch_messages_t *messages;
+    GHashTable *hash;
+    unsigned int count;
+    notmuch_sort_t sort;
+
+    sort = query->sort;
+    query->sort = NOTMUCH_SORT_UNSORTED;
+    messages = notmuch_query_search_messages (query);
+    query->sort = sort;
+    if (messages == NULL)
+	return 0;
+
+    hash = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, NULL);
+    if (hash == NULL) {
+	talloc_free (messages);
+	return 0;
+    }
+
+    while (notmuch_messages_valid (messages)) {
+	notmuch_message_t *message = notmuch_messages_get (messages);
+	const char *thread_id = notmuch_message_get_thread_id (message);
+	char *thread_id_copy = talloc_strdup (messages, thread_id);
+	if (unlikely (thread_id_copy == NULL)) {
+	    notmuch_message_destroy (message);
+	    count = 0;
+	    goto DONE;
+	}
+	g_hash_table_insert (hash, thread_id_copy, NULL);
+	notmuch_message_destroy (message);
+	notmuch_messages_move_to_next (messages);
+    }
+
+    count = g_hash_table_size (hash);
+
+  DONE:
+    g_hash_table_unref (hash);
+    talloc_free (messages);
+
+    return count;
+}