gtk2/gtk/gtksearchenginetracker.c

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/*
* Copyright (C) 2005 Mr Jamie McCracken
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
*
* Author: Jamie McCracken <jamiemcc@gnome.org>
*
* Based on nautilus-search-engine-tracker.c
*/
#include <config.h>
#include <gmodule.h>
#include "gtksearchenginetracker.h"
#if 0
#include <tracker.h>
#endif
/* we dlopen() libtracker at runtime */
typedef struct _TrackerClient TrackerClient;
typedef void (*TrackerArrayReply) (char **result, GError *error, gpointer user_data);
static TrackerClient * (*tracker_connect) (gboolean enable_warnings) = NULL;
static void (*tracker_disconnect) (TrackerClient *client) = NULL;
static void (*tracker_cancel_last_call) (TrackerClient *client) = NULL;
static void (*tracker_search_metadata_by_text_async) (TrackerClient *client,
const char *query,
TrackerArrayReply callback,
gpointer user_data) = NULL;
static void (*tracker_search_metadata_by_text_and_location_async) (TrackerClient *client,
const char *query,
const char *location,
TrackerArrayReply callback,
gpointer user_data) = NULL;
static struct TrackerDlMapping
{
const char *fn_name;
gpointer *fn_ptr_ref;
} tracker_dl_mapping[] =
{
#define MAP(a) { #a, (gpointer *)&a }
MAP (tracker_connect),
MAP (tracker_disconnect),
MAP (tracker_cancel_last_call),
MAP (tracker_search_metadata_by_text_async),
MAP (tracker_search_metadata_by_text_and_location_async),
#undef MAP
};
static void
open_libtracker (void)
{
static gboolean done = FALSE;
if (!done)
{
int i;
GModule *tracker;
GModuleFlags flags;
done = TRUE;
flags = G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL;
tracker = g_module_open ("libtrackerclient.so.0", flags);
if (!tracker)
tracker = g_module_open ("libtracker.so.0", flags);
if (!tracker)
return;
for (i = 0; i < G_N_ELEMENTS (tracker_dl_mapping); i++)
{
if (!g_module_symbol (tracker, tracker_dl_mapping[i].fn_name,
tracker_dl_mapping[i].fn_ptr_ref))
{
g_warning ("Missing symbol '%s' in libtracker\n",
tracker_dl_mapping[i].fn_name);
g_module_close (tracker);
for (i = 0; i < G_N_ELEMENTS (tracker_dl_mapping); i++)
tracker_dl_mapping[i].fn_ptr_ref = NULL;
return;
}
}
}
}
struct _GtkSearchEngineTrackerPrivate
{
GtkQuery *query;
TrackerClient *client;
gboolean query_pending;
};
G_DEFINE_TYPE (GtkSearchEngineTracker, _gtk_search_engine_tracker, GTK_TYPE_SEARCH_ENGINE);
static void
finalize (GObject *object)
{
GtkSearchEngineTracker *tracker;
tracker = GTK_SEARCH_ENGINE_TRACKER (object);
if (tracker->priv->query)
{
g_object_unref (tracker->priv->query);
tracker->priv->query = NULL;
}
tracker_disconnect (tracker->priv->client);
G_OBJECT_CLASS (_gtk_search_engine_tracker_parent_class)->finalize (object);
}
static void
search_callback (gchar **results,
GError *error,
gpointer user_data)
{
GtkSearchEngineTracker *tracker;
gchar **results_p;
GList *hit_uris;
tracker = GTK_SEARCH_ENGINE_TRACKER (user_data);
hit_uris = NULL;
tracker->priv->query_pending = FALSE;
if (error)
{
_gtk_search_engine_error ( GTK_SEARCH_ENGINE (tracker), error->message);
g_error_free (error);
return;
}
if (!results)
return;
for (results_p = results; *results_p; results_p++)
{
gchar *uri;
uri = g_filename_to_uri (*results_p, NULL, NULL);
if (uri)
hit_uris = g_list_prepend (hit_uris, uri);
}
_gtk_search_engine_hits_added (GTK_SEARCH_ENGINE (tracker), hit_uris);
_gtk_search_engine_finished (GTK_SEARCH_ENGINE (tracker));
g_strfreev (results);
g_list_foreach (hit_uris, (GFunc)g_free, NULL);
g_list_free (hit_uris);
}
static void
gtk_search_engine_tracker_start (GtkSearchEngine *engine)
{
GtkSearchEngineTracker *tracker;
gchar *search_text, *location, *location_uri;
tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
if (tracker->priv->query_pending)
return;
if (tracker->priv->query == NULL)
return;
search_text = _gtk_query_get_text (tracker->priv->query);
location_uri = _gtk_query_get_location (tracker->priv->query);
location = NULL;
if (location_uri)
{
location = g_filename_from_uri (location_uri, NULL, NULL);
g_free (location_uri);
}
if (location)
{
tracker_search_metadata_by_text_and_location_async (tracker->priv->client,
search_text,
location,
search_callback,
tracker);
g_free (location);
}
else
{
tracker_search_metadata_by_text_async (tracker->priv->client,
search_text,
search_callback,
tracker);
}
tracker->priv->query_pending = TRUE;
g_free (search_text);
}
static void
gtk_search_engine_tracker_stop (GtkSearchEngine *engine)
{
GtkSearchEngineTracker *tracker;
tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
if (tracker->priv->query && tracker->priv->query_pending)
{
tracker_cancel_last_call (tracker->priv->client);
tracker->priv->query_pending = FALSE;
}
}
static gboolean
gtk_search_engine_tracker_is_indexed (GtkSearchEngine *engine)
{
return TRUE;
}
static void
gtk_search_engine_tracker_set_query (GtkSearchEngine *engine,
GtkQuery *query)
{
GtkSearchEngineTracker *tracker;
tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
if (query)
g_object_ref (query);
if (tracker->priv->query)
g_object_unref (tracker->priv->query);
tracker->priv->query = query;
}
static void
_gtk_search_engine_tracker_class_init (GtkSearchEngineTrackerClass *class)
{
GObjectClass *gobject_class;
GtkSearchEngineClass *engine_class;
gobject_class = G_OBJECT_CLASS (class);
gobject_class->finalize = finalize;
engine_class = GTK_SEARCH_ENGINE_CLASS (class);
engine_class->set_query = gtk_search_engine_tracker_set_query;
engine_class->start = gtk_search_engine_tracker_start;
engine_class->stop = gtk_search_engine_tracker_stop;
engine_class->is_indexed = gtk_search_engine_tracker_is_indexed;
g_type_class_add_private (gobject_class, sizeof (GtkSearchEngineTrackerPrivate));
}
static void
_gtk_search_engine_tracker_init (GtkSearchEngineTracker *engine)
{
engine->priv = G_TYPE_INSTANCE_GET_PRIVATE (engine, GTK_TYPE_SEARCH_ENGINE_TRACKER, GtkSearchEngineTrackerPrivate);
}
GtkSearchEngine *
_gtk_search_engine_tracker_new (void)
{
GtkSearchEngineTracker *engine;
TrackerClient *tracker_client;
open_libtracker ();
if (!tracker_connect)
return NULL;
tracker_client = tracker_connect (FALSE);
if (!tracker_client)
return NULL;
engine = g_object_new (GTK_TYPE_SEARCH_ENGINE_TRACKER, NULL);
engine->priv->client = tracker_client;
engine->priv->query_pending = FALSE;
return GTK_SEARCH_ENGINE (engine);
}