]> git.notmuchmail.org Git - notmuch/blobdiff - lib/query.cc
lib: add support for path: prefix searches
[notmuch] / lib / query.cc
index b6c0f12d9cd87f73993be6ef6c822319df888995..60ff8bd9a39e1707e12a4e96cff99890b00d669b 100644 (file)
@@ -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_exclude_t omit_excluded;
 };
 
 typedef struct _notmuch_mset_messages {
@@ -37,12 +39,12 @@ typedef struct _notmuch_mset_messages {
 } notmuch_mset_messages_t;
 
 struct _notmuch_doc_id_set {
-    unsigned int *bitmap;
+    unsigned char *bitmap;
     unsigned int bound;
 };
 
-#define DOCIDSET_WORD(bit) ((bit) / sizeof (unsigned int))
-#define DOCIDSET_BIT(bit) ((bit) % sizeof (unsigned int))
+#define DOCIDSET_WORD(bit) ((bit) / CHAR_BIT)
+#define DOCIDSET_BIT(bit) ((bit) % CHAR_BIT)
 
 struct visible _notmuch_threads {
     notmuch_query_t *query;
@@ -56,17 +58,29 @@ 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);
+
+static notmuch_bool_t
+_debug_query (void)
+{
+    char *env = getenv ("NOTMUCH_DEBUG_QUERY");
+    return (env && strcmp (env, "") != 0);
+}
+
 notmuch_query_t *
 notmuch_query_create (notmuch_database_t *notmuch,
                      const char *query_string)
 {
     notmuch_query_t *query;
 
-#ifdef DEBUG_QUERY
-    fprintf (stderr, "Query string is:\n%s\n", query_string);
-#endif
+    if (_debug_query ())
+       fprintf (stderr, "Query string is:\n%s\n", query_string);
 
-    query = talloc (NULL, notmuch_query_t);
+    query = talloc (notmuch, notmuch_query_t);
     if (unlikely (query == NULL))
        return NULL;
 
@@ -76,6 +90,10 @@ notmuch_query_create (notmuch_database_t *notmuch,
 
     query->sort = NOTMUCH_SORT_NEWEST_FIRST;
 
+    query->exclude_terms = _notmuch_string_list_create (query);
+
+    query->omit_excluded = NOTMUCH_EXCLUDE_TRUE;
+
     return query;
 }
 
@@ -85,6 +103,13 @@ notmuch_query_get_query_string (notmuch_query_t *query)
     return query->query_string;
 }
 
+void
+notmuch_query_set_omit_excluded (notmuch_query_t *query,
+                                notmuch_exclude_t omit_excluded)
+{
+    query->omit_excluded = omit_excluded;
+}
+
 void
 notmuch_query_set_sort (notmuch_query_t *query, notmuch_sort_t sort)
 {
@@ -97,6 +122,13 @@ 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 +144,33 @@ _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 +196,9 @@ 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 +216,38 @@ 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->omit_excluded != NOTMUCH_EXCLUDE_FALSE) && (query->exclude_terms)) {
+           exclude_query = _notmuch_exclude_tags (query, final_query);
+
+           if (query->omit_excluded == NOTMUCH_EXCLUDE_TRUE ||
+               query->omit_excluded == NOTMUCH_EXCLUDE_ALL)
+           {
+               final_query = Xapian::Query (Xapian::Query::OP_AND_NOT,
+                                            final_query, exclude_query);
+           } else { /* NOTMUCH_EXCLUDE_FLAG */
+               exclude_query = Xapian::Query (Xapian::Query::OP_AND,
+                                          exclude_query, final_query);
+
+               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());
 
@@ -173,9 +265,12 @@ notmuch_query_search_messages (notmuch_query_t *query)
            break;
        }
 
-#if DEBUG_QUERY
-       fprintf (stderr, "Final query is:\n%s\n", final_query.get_description().c_str());
-#endif
+       if (_debug_query ()) {
+           fprintf (stderr, "Exclude query is:\n%s\n",
+                    exclude_query.get_description ().c_str ());
+           fprintf (stderr, "Final query is:\n%s\n",
+                    final_query.get_description ().c_str ());
+       }
 
        enquire.set_query (final_query);
 
@@ -244,6 +339,10 @@ _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;
 }
 
@@ -263,11 +362,11 @@ _notmuch_doc_id_set_init (void *ctx,
                          GArray *arr)
 {
     unsigned int max = 0;
-    unsigned int *bitmap;
+    unsigned char *bitmap;
 
     for (unsigned int i = 0; i < arr->len; i++)
        max = MAX(max, g_array_index (arr, unsigned int, i));
-    bitmap = talloc_zero_array (ctx, unsigned int, 1 + max / sizeof (*bitmap));
+    bitmap = talloc_zero_array (ctx, unsigned char, DOCIDSET_WORD(max) + 1);
 
     if (bitmap == NULL)
        return FALSE;
@@ -363,6 +462,9 @@ notmuch_threads_valid (notmuch_threads_t *threads)
 {
     unsigned int doc_id;
 
+    if (! threads)
+       return FALSE;
+
     while (threads->doc_id_pos < threads->doc_ids->len) {
        doc_id = g_array_index (threads->doc_ids, unsigned int,
                                threads->doc_id_pos);
@@ -389,6 +491,8 @@ notmuch_threads_get (notmuch_threads_t *threads)
                                   threads->query->notmuch,
                                   doc_id,
                                   &threads->match_set,
+                                  threads->query->exclude_terms,
+                                  threads->query->omit_excluded,
                                   threads->query->sort);
 }
 
@@ -416,7 +520,7 @@ 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 |
@@ -436,12 +540,20 @@ 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);
 
-#if DEBUG_QUERY
-       fprintf (stderr, "Final query is:\n%s\n", final_query.get_description().c_str());
-#endif
+       if (_debug_query ()) {
+           fprintf (stderr, "Exclude query is:\n%s\n",
+                    exclude_query.get_description ().c_str ());
+           fprintf (stderr, "Final query is:\n%s\n",
+                    final_query.get_description ().c_str ());
+       }
 
        enquire.set_query (final_query);