2 * Copyright (C) 2009-2011 Nokia <ivan.frade@nokia.com>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
17 * Authors: Jürg Billeter <juerg.billeter@codethink.co.uk>
18 * Martyn Russell <martyn@lanedo.com>
20 * Based on nautilus-search-engine-tracker.c
32 #include "gtksearchenginetracker.h"
34 #define DBUS_SERVICE_RESOURCES "org.freedesktop.Tracker1"
35 #define DBUS_PATH_RESOURCES "/org/freedesktop/Tracker1/Resources"
36 #define DBUS_INTERFACE_RESOURCES "org.freedesktop.Tracker1.Resources"
38 #define DBUS_SERVICE_STATUS "org.freedesktop.Tracker1"
39 #define DBUS_PATH_STATUS "/org/freedesktop/Tracker1/Status"
40 #define DBUS_INTERFACE_STATUS "org.freedesktop.Tracker1.Status"
42 /* Time in second to wait for service before deciding it's not available */
43 #define WAIT_TIMEOUT_SECONDS 1
45 /* Time in second to wait for query results to come back */
46 #define QUERY_TIMEOUT_SECONDS 10
48 /* If defined, we use fts:match, this has to be enabled in Tracker to
49 * work which it usually is. The alternative is to undefine it and
50 * use filename matching instead. This doesn't use the content of the
56 * GtkSearchEngineTracker object
58 struct _GtkSearchEngineTrackerPrivate
60 GDBusConnection *connection;
61 GCancellable *cancellable;
63 gboolean query_pending;
66 G_DEFINE_TYPE (GtkSearchEngineTracker, _gtk_search_engine_tracker, GTK_TYPE_SEARCH_ENGINE);
69 finalize (GObject *object)
71 GtkSearchEngineTracker *tracker;
73 g_debug ("Finalizing GtkSearchEngineTracker");
75 tracker = GTK_SEARCH_ENGINE_TRACKER (object);
77 if (tracker->priv->cancellable)
79 g_cancellable_cancel (tracker->priv->cancellable);
80 g_object_unref (tracker->priv->cancellable);
81 tracker->priv->cancellable = NULL;
84 if (tracker->priv->query)
86 g_object_unref (tracker->priv->query);
87 tracker->priv->query = NULL;
90 if (tracker->priv->connection)
92 g_object_unref (tracker->priv->connection);
93 tracker->priv->connection = NULL;
96 G_OBJECT_CLASS (_gtk_search_engine_tracker_parent_class)->finalize (object);
99 static GDBusConnection *
100 get_connection (void)
102 GDBusConnection *connection;
103 GError *error = NULL;
106 /* Normally I hate sync calls with UIs, but we need to return NULL
107 * or a GtkSearchEngine as a result of this function.
109 connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
113 g_debug ("Couldn't connect to D-Bus session bus, %s", error->message);
114 g_error_free (error);
118 /* If connection is set, we know it worked. */
119 g_debug ("Finding out if Tracker is available via D-Bus...");
121 /* We only wait 1 second max, we expect it to be very fast. If we
122 * don't get a response by then, clearly we're replaying a journal
123 * or cleaning up the DB internally. Either way, services is not
126 * We use the sync call here because we don't expect to be waiting
127 * long enough to block UI painting.
129 reply = g_dbus_connection_call_sync (connection,
132 DBUS_INTERFACE_STATUS,
136 G_DBUS_CALL_FLAGS_NONE,
137 WAIT_TIMEOUT_SECONDS * 1000,
143 g_debug ("Tracker is not available, %s", error->message);
144 g_error_free (error);
145 g_object_unref (connection);
149 g_variant_unref (reply);
151 g_debug ("Tracker is ready");
157 get_query_results (GtkSearchEngineTracker *engine,
159 GAsyncReadyCallback callback,
162 g_dbus_connection_call (engine->priv->connection,
163 DBUS_SERVICE_RESOURCES,
165 DBUS_INTERFACE_RESOURCES,
167 g_variant_new ("(s)", sparql),
169 G_DBUS_CALL_FLAGS_NONE,
170 QUERY_TIMEOUT_SECONDS * 1000,
171 engine->priv->cancellable,
176 /* Stolen from libtracker-common */
178 string_list_to_gslist (gchar **strv)
185 for (i = 0; strv[i]; i++)
186 list = g_list_prepend (list, g_strdup (strv[i]));
188 return g_list_reverse (list);
191 /* Stolen from libtracker-sparql */
193 sparql_escape_string (const gchar *literal)
198 g_return_val_if_fail (literal != NULL, NULL);
200 str = g_string_new ("");
210 len = strcspn ((const gchar *) p, "\t\n\r\b\f\"\\");
211 g_string_append_len (str, (const gchar *) p, (gssize) ((glong) len));
217 g_string_append (str, "\\t");
220 g_string_append (str, "\\n");
223 g_string_append (str, "\\r");
226 g_string_append (str, "\\b");
229 g_string_append (str, "\\f");
232 g_string_append (str, "\\\"");
235 g_string_append (str, "\\\\");
243 return g_string_free (str, FALSE);
247 sparql_append_string_literal (GString *sparql,
252 s = sparql_escape_string (str);
254 g_string_append_c (sparql, '"');
255 g_string_append (sparql, s);
256 g_string_append_c (sparql, '"');
262 sparql_append_string_literal_lower_case (GString *sparql,
267 s = g_utf8_strdown (str, -1);
268 sparql_append_string_literal (sparql, s);
273 query_callback (GObject *object,
277 GtkSearchEngineTracker *tracker;
283 GError *error = NULL;
286 gdk_threads_enter ();
288 tracker = GTK_SEARCH_ENGINE_TRACKER (user_data);
290 tracker->priv->query_pending = FALSE;
292 reply = g_dbus_connection_call_finish (tracker->priv->connection, res, &error);
295 _gtk_search_engine_error (GTK_SEARCH_ENGINE (tracker), error->message);
296 g_error_free (error);
297 gdk_threads_leave ();
303 _gtk_search_engine_finished (GTK_SEARCH_ENGINE (tracker));
304 gdk_threads_leave ();
308 r = g_variant_get_child_value (reply, 0);
309 g_variant_iter_init (&iter, r);
310 n = g_variant_iter_n_children (&iter);
311 result = g_new0 (gchar *, n + 1);
312 for (i = 0; i < n; i++)
317 v = g_variant_iter_next_value (&iter);
318 strv = g_variant_get_strv (v, NULL);
319 result[i] = (gchar*)strv[0];
323 /* We iterate result by result, not n at a time. */
324 hits = string_list_to_gslist (result);
325 _gtk_search_engine_hits_added (GTK_SEARCH_ENGINE (tracker), hits);
326 _gtk_search_engine_finished (GTK_SEARCH_ENGINE (tracker));
329 g_variant_unref (reply);
332 gdk_threads_leave ();
336 gtk_search_engine_tracker_start (GtkSearchEngine *engine)
338 GtkSearchEngineTracker *tracker;
345 tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
347 if (tracker->priv->query_pending)
349 g_debug ("Attempt to start a new search while one is pending, doing nothing");
353 if (tracker->priv->query == NULL)
355 g_debug ("Attempt to start a new search with no GtkQuery, doing nothing");
359 search_text = _gtk_query_get_text (tracker->priv->query);
362 location_uri = _gtk_query_get_location (tracker->priv->query);
364 sparql = g_string_new ("SELECT nie:url(?urn) "
366 " ?urn a nfo:FileDataObject ;"
367 " tracker:available true ; "
369 sparql_append_string_literal (sparql, search_text);
373 g_string_append (sparql, " . FILTER (fn:starts-with(nie:url(?urn),");
374 sparql_append_string_literal (sparql, location_uri);
375 g_string_append (sparql, "))");
378 g_string_append (sparql, " } ORDER BY DESC(fts:rank(?urn)) ASC(nie:url(?urn))");
379 #else /* FTS_MATCHING */
380 /* Using filename matching: */
381 sparql = g_string_new ("SELECT nie:url(?urn) "
383 " ?urn a nfo:FileDataObject ;"
384 " tracker:available true ."
385 " FILTER (fn:contains(fn:lower-case(nfo:fileName(?urn)),");
386 sparql_append_string_literal_lower_case (sparql, search_text);
388 g_string_append (sparql,
390 "} ORDER BY DESC(nie:url(?urn)) DESC(nfo:fileName(?urn))");
391 #endif /* FTS_MATCHING */
393 tracker->priv->query_pending = TRUE;
395 get_query_results (tracker, sparql->str, query_callback, tracker);
397 g_string_free (sparql, TRUE);
398 g_free (search_text);
402 gtk_search_engine_tracker_stop (GtkSearchEngine *engine)
404 GtkSearchEngineTracker *tracker;
406 tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
408 if (tracker->priv->query && tracker->priv->query_pending)
410 g_cancellable_cancel (tracker->priv->cancellable);
411 tracker->priv->query_pending = FALSE;
416 gtk_search_engine_tracker_is_indexed (GtkSearchEngine *engine)
422 gtk_search_engine_tracker_set_query (GtkSearchEngine *engine,
425 GtkSearchEngineTracker *tracker;
427 tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
430 g_object_ref (query);
432 if (tracker->priv->query)
433 g_object_unref (tracker->priv->query);
435 tracker->priv->query = query;
439 _gtk_search_engine_tracker_class_init (GtkSearchEngineTrackerClass *class)
441 GObjectClass *gobject_class;
442 GtkSearchEngineClass *engine_class;
444 gobject_class = G_OBJECT_CLASS (class);
445 gobject_class->finalize = finalize;
447 engine_class = GTK_SEARCH_ENGINE_CLASS (class);
448 engine_class->set_query = gtk_search_engine_tracker_set_query;
449 engine_class->start = gtk_search_engine_tracker_start;
450 engine_class->stop = gtk_search_engine_tracker_stop;
451 engine_class->is_indexed = gtk_search_engine_tracker_is_indexed;
453 g_type_class_add_private (gobject_class,
454 sizeof (GtkSearchEngineTrackerPrivate));
458 _gtk_search_engine_tracker_init (GtkSearchEngineTracker *engine)
460 engine->priv = G_TYPE_INSTANCE_GET_PRIVATE (engine,
461 GTK_TYPE_SEARCH_ENGINE_TRACKER,
462 GtkSearchEngineTrackerPrivate);
467 _gtk_search_engine_tracker_new (void)
469 GtkSearchEngineTracker *engine;
470 GDBusConnection *connection;
474 connection = get_connection ();
478 g_debug ("Creating GtkSearchEngineTracker...");
480 engine = g_object_new (GTK_TYPE_SEARCH_ENGINE_TRACKER, NULL);
482 engine->priv->connection = connection;
483 engine->priv->cancellable = g_cancellable_new ();
484 engine->priv->query_pending = FALSE;
486 return GTK_SEARCH_ENGINE (engine);