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search: update for tracker 0.8 API
Tracker 0.8 series (and late 0.7.xx) introduces new API based on SPARQL query language. The queries here use fulltext search, just like with with previous tracker versions. Old tracker 0.6 support is still maintained.
This commit is contained in:
Tomas Bzatek
Tristan Van Berkom
parent
e64cc4edeb
commit
95dbbe2bda
@ -23,9 +23,6 @@
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#include "config.h"
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#include <gmodule.h>
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#include "gtksearchenginetracker.h"
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#if 0
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#include <tracker.h>
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#endif
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/* we dlopen() libtracker at runtime */
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@ -34,9 +31,12 @@ typedef struct _TrackerClient TrackerClient;
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typedef enum
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{
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TRACKER_0_6 = 1 << 0,
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TRACKER_0_7 = 1 << 1
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TRACKER_0_7 = 1 << 1,
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TRACKER_0_8 = 1 << 2
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} TrackerVersion;
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/* tracker 0.6 API */
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typedef void (*TrackerArrayReply) (char **result, GError *error, gpointer user_data);
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static TrackerClient * (*tracker_connect) (gboolean enable_warnings, gint timeout) = NULL;
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@ -53,6 +53,23 @@ static void (*tracker_search_metadata_by_text_and_location_async) (TrackerClient
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const char *location,
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TrackerArrayReply callback,
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gpointer user_data) = NULL;
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/* tracker 0.8 API */
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typedef enum {
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TRACKER_CLIENT_ENABLE_WARNINGS = 1 << 0
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} TrackerClientFlags;
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typedef void (*TrackerReplyGPtrArray) (GPtrArray *result,
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GError *error,
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gpointer user_data);
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static TrackerClient * (*tracker_client_new) (TrackerClientFlags flags,
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gint timeout) = NULL;
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static gchar * (*tracker_sparql_escape) (const gchar *str) = NULL;
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static guint (*tracker_resources_sparql_query_async) (TrackerClient *client,
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const gchar *query,
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TrackerReplyGPtrArray callback,
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gpointer user_data) = NULL;
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static struct TrackerDlMapping
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{
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@ -65,9 +82,12 @@ static struct TrackerDlMapping
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MAP (tracker_connect, TRACKER_0_6 | TRACKER_0_7),
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MAP (tracker_disconnect, TRACKER_0_6 | TRACKER_0_7),
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MAP (tracker_get_version, TRACKER_0_6),
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MAP (tracker_cancel_last_call, TRACKER_0_6 | TRACKER_0_7),
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MAP (tracker_cancel_last_call, TRACKER_0_6 | TRACKER_0_7 | TRACKER_0_8),
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MAP (tracker_search_metadata_by_text_async, TRACKER_0_6 | TRACKER_0_7),
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MAP (tracker_search_metadata_by_text_and_location_async, TRACKER_0_6 | TRACKER_0_7),
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MAP (tracker_client_new, TRACKER_0_8),
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MAP (tracker_sparql_escape, TRACKER_0_8),
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MAP (tracker_resources_sparql_query_async, TRACKER_0_8)
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#undef MAP
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};
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@ -76,6 +96,7 @@ open_libtracker (void)
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{
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static gboolean done = FALSE;
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static TrackerVersion version = 0;
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gpointer x;
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if (!done)
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{
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@ -89,6 +110,11 @@ open_libtracker (void)
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tracker = g_module_open ("libtracker-client-0.7.so.0", flags);
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version = TRACKER_0_7;
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if (tracker && g_module_symbol (tracker, "tracker_resources_sparql_query_async", &x))
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{
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version = TRACKER_0_8;
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}
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if (!tracker)
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{
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tracker = g_module_open ("libtrackerclient.so.0", flags);
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@ -151,20 +177,43 @@ finalize (GObject *object)
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tracker->priv->query = NULL;
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}
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if (tracker->priv->version == TRACKER_0_8)
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g_object_unref (tracker->priv->client);
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else
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tracker_disconnect (tracker->priv->client);
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G_OBJECT_CLASS (_gtk_search_engine_tracker_parent_class)->finalize (object);
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}
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/* stolen from tracker sources, tracker.c */
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static void
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search_callback (gchar **results,
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sparql_append_string_literal (GString *sparql,
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const gchar *str)
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{
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char *s;
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s = tracker_sparql_escape (str);
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g_string_append_c (sparql, '"');
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g_string_append (sparql, s);
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g_string_append_c (sparql, '"');
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g_free (s);
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}
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static void
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search_callback (gpointer results,
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GError *error,
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gpointer user_data)
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{
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GtkSearchEngineTracker *tracker;
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gchar **results_p;
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GList *hit_uris;
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GPtrArray *OUT_result;
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gchar *uri;
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gint i;
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tracker = GTK_SEARCH_ENGINE_TRACKER (user_data);
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hit_uris = NULL;
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@ -181,24 +230,38 @@ search_callback (gchar **results,
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if (!results)
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return;
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if (tracker->priv->version == TRACKER_0_8)
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{
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OUT_result = (GPtrArray*) results;
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for (i = 0; i < OUT_result->len; i++)
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{
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uri = g_strdup (((gchar **) OUT_result->pdata[i])[0]);
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if (uri)
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hit_uris = g_list_prepend (hit_uris, uri);
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}
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g_ptr_array_foreach (OUT_result, (GFunc) g_free, NULL);
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g_ptr_array_free (OUT_result, TRUE);
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}
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else
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{
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for (results_p = results; *results_p; results_p++)
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{
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gchar *uri;
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if (tracker->priv->version == TRACKER_0_6)
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uri = g_filename_to_uri (*results_p, NULL, NULL);
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else
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uri = *results_p;
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uri = g_strdup (*results_p);
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if (uri)
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hit_uris = g_list_prepend (hit_uris, uri);
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}
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g_strfreev ((gchar **) results);
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}
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_gtk_search_engine_hits_added (GTK_SEARCH_ENGINE (tracker), hit_uris);
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_gtk_search_engine_finished (GTK_SEARCH_ENGINE (tracker));
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g_strfreev (results);
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if (tracker->priv->version == TRACKER_0_6)
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g_list_foreach (hit_uris, (GFunc) g_free, NULL);
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g_list_free (hit_uris);
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}
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@ -209,6 +272,7 @@ gtk_search_engine_tracker_start (GtkSearchEngine *engine)
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{
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GtkSearchEngineTracker *tracker;
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gchar *search_text, *location, *location_uri;
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GString *sparql;
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tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
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@ -233,25 +297,46 @@ gtk_search_engine_tracker_start (GtkSearchEngine *engine)
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location = location_uri;
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}
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if (tracker->priv->version == TRACKER_0_8)
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{
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sparql = g_string_new ("SELECT ?url WHERE { ?file a nfo:FileDataObject; nie:url ?url; fts:match ");
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sparql_append_string_literal (sparql, search_text);
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if (location)
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{
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g_string_append (sparql, " . FILTER (fn:starts-with(?url,");
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sparql_append_string_literal (sparql, location);
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g_string_append (sparql, "))");
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}
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g_string_append (sparql, " }");
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tracker_resources_sparql_query_async (tracker->priv->client,
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sparql->str,
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(TrackerReplyGPtrArray) search_callback,
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tracker);
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g_string_free (sparql, TRUE);
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}
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else
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{
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if (location)
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{
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tracker_search_metadata_by_text_and_location_async (tracker->priv->client,
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search_text,
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location,
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search_callback,
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(TrackerArrayReply) search_callback,
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tracker);
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g_free (location);
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}
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else
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{
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tracker_search_metadata_by_text_async (tracker->priv->client,
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search_text,
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search_callback,
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(TrackerArrayReply) search_callback,
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tracker);
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}
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}
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tracker->priv->query_pending = TRUE;
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g_free (search_text);
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g_free (location);
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}
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static void
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@ -326,14 +411,22 @@ _gtk_search_engine_tracker_new (void)
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version = open_libtracker ();
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if (version == TRACKER_0_8)
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{
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tracker_client = tracker_client_new (TRACKER_CLIENT_ENABLE_WARNINGS, G_MAXINT);
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}
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else
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{
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if (!tracker_connect)
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return NULL;
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tracker_client = tracker_connect (FALSE, -1);
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}
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if (!tracker_client)
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return NULL;
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if (version == TRACKER_0_6)
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{
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if (!tracker_get_version)
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