forked from AuroraMiddleware/gtk
GtkSearchEngineTracker: port to tracker 0.12
We simply use the Tracker DBus api here, caching and direct access that come with libtracker-sparql are probably not needed here. Based on a patch by Martyn Russell. https://bugzilla.gnome.org/show_bug.cgi?id=658272
This commit is contained in:
Matthias Clasen
parent
4a22e2ceab
commit
0f22ef3f31
@ -1,6 +1,5 @@
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/*
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* Copyright (C) 2005 Jamie McCracken <jamiemcc@gnome.org>
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* Copyright (C) 2009-2010 Nokia <ivan.frade@nokia.com>
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* Copyright (C) 2009-2011 Nokia <ivan.frade@nokia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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@ -16,8 +15,7 @@
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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*
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* Authors: Jamie McCracken <jamiemcc@gnome.org>
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* Jürg Billeter <juerg.billeter@codethink.co.uk>
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* Authors: Jürg Billeter <juerg.billeter@codethink.co.uk>
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* Martyn Russell <martyn@lanedo.com>
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*
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* Based on nautilus-search-engine-tracker.c
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@ -25,189 +23,234 @@
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#include "config.h"
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#include "gtksearchenginetracker.h"
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#include <string.h>
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#include <gio/gio.h>
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#include <gmodule.h>
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#include <gdk/gdk.h>
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#include <gtk/gtk.h>
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/* we dlopen() libtracker at runtime */
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#include "gtksearchenginetracker.h"
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typedef struct _TrackerClient TrackerClient;
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#define DBUS_SERVICE_RESOURCES "org.freedesktop.Tracker1"
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#define DBUS_PATH_RESOURCES "/org/freedesktop/Tracker1/Resources"
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#define DBUS_INTERFACE_RESOURCES "org.freedesktop.Tracker1.Resources"
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typedef enum
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{
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TRACKER_UNAVAILABLE = 0,
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TRACKER_0_6 = 1 << 0,
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TRACKER_0_7 = 1 << 1,
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TRACKER_0_8 = 1 << 2,
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TRACKER_0_9 = 1 << 3
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} TrackerVersion;
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#define DBUS_SERVICE_STATUS "org.freedesktop.Tracker1"
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#define DBUS_PATH_STATUS "/org/freedesktop/Tracker1/Status"
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#define DBUS_INTERFACE_STATUS "org.freedesktop.Tracker1.Status"
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/* Time in second to wait for service before deciding it's not available */
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#define WAIT_TIMEOUT_SECONDS 1
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/* Tracker 0.6 API */
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typedef void (*TrackerArrayReply) (char **result,
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GError *error,
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gpointer user_data);
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/* Time in second to wait for query results to come back */
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#define QUERY_TIMEOUT_SECONDS 10
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static TrackerClient *
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(*tracker_connect) (gboolean enable_warnings,
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gint timeout) = NULL;
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static void (*tracker_disconnect) (TrackerClient *client) = NULL;
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static int (*tracker_get_version) (TrackerClient *client,
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GError **error) = NULL;
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static void (*tracker_cancel_last_call) (TrackerClient *client) = NULL;
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static void (*tracker_search_metadata_by_text_async) (TrackerClient *client,
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const char *query,
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TrackerArrayReply callback,
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gpointer user_data) = NULL;
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static void (*tracker_search_metadata_by_text_and_location_async) (TrackerClient *client,
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const char *query,
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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 0.7->0.9 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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const char *fn_name;
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gpointer *fn_ptr_ref;
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TrackerVersion versions;
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} tracker_dl_mapping[] =
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{
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#define MAP(a,v) { #a, (gpointer *)&a, v }
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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 | TRACKER_0_8 | TRACKER_0_9),
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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 | TRACKER_0_9),
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MAP (tracker_sparql_escape, TRACKER_0_8 | TRACKER_0_9),
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MAP (tracker_resources_sparql_query_async, TRACKER_0_8 | TRACKER_0_9)
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#undef MAP
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};
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static TrackerVersion
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open_libtracker (void)
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{
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static gboolean done = FALSE;
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static TrackerVersion version = TRACKER_UNAVAILABLE;
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if (!done)
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{
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gint i;
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GModule *tracker;
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GModuleFlags flags;
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done = TRUE;
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flags = G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL;
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/* So this is the order:
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*
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* - 0.9 (latest unstable)
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* - 0.8 (stable)
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* - 0.7 (unstable, 0.6 sucks so badly)
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* - 0.6 (stable)
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*/
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if ((tracker = g_module_open ("libtracker-client-0.9.so.0", flags)) != NULL)
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version = TRACKER_0_9;
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else if ((tracker = g_module_open ("libtracker-client-0.8.so.0", flags)) != NULL)
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version = TRACKER_0_8;
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else if ((tracker = g_module_open ("libtracker-client-0.7.so.0", flags)) != NULL)
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version = TRACKER_0_7;
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else if ((tracker = g_module_open ("libtrackerclient.so.0", flags)) != NULL)
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version = TRACKER_0_6;
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else
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{
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g_debug ("No tracker backend available");
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return TRACKER_UNAVAILABLE;
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}
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for (i = 0; i < G_N_ELEMENTS (tracker_dl_mapping); i++)
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{
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if ((tracker_dl_mapping[i].versions & version) == 0)
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continue;
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if (!g_module_symbol (tracker,
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tracker_dl_mapping[i].fn_name,
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tracker_dl_mapping[i].fn_ptr_ref))
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{
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g_warning ("Missing symbol '%s' in libtracker\n",
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tracker_dl_mapping[i].fn_name);
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g_module_close (tracker);
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for (i = 0; i < G_N_ELEMENTS (tracker_dl_mapping); i++)
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tracker_dl_mapping[i].fn_ptr_ref = NULL;
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return TRACKER_UNAVAILABLE;
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}
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}
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}
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return version;
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}
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/* If defined, we use fts:match, this has to be enabled in Tracker to
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* work which it usually is. The alternative is to undefine it and
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* use filename matching instead. This doesn't use the content of the
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* file however.
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*/
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#undef FTS_MATCHING
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/*
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* GtkSearchEngineTracker object
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*/
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struct _GtkSearchEngineTrackerPrivate
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{
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GtkQuery *query;
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TrackerClient *client;
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gboolean query_pending;
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TrackerVersion version;
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GDBusConnection *connection;
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GCancellable *cancellable;
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GtkQuery *query;
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gboolean query_pending;
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};
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G_DEFINE_TYPE (GtkSearchEngineTracker, _gtk_search_engine_tracker, GTK_TYPE_SEARCH_ENGINE);
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static void
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finalize (GObject *object)
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{
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GtkSearchEngineTracker *tracker;
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g_debug ("Finalizing GtkSearchEngineTracker");
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tracker = GTK_SEARCH_ENGINE_TRACKER (object);
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if (tracker->priv->cancellable)
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{
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g_cancellable_cancel (tracker->priv->cancellable);
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g_object_unref (tracker->priv->cancellable);
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tracker->priv->cancellable = NULL;
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}
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if (tracker->priv->query)
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{
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g_object_unref (tracker->priv->query);
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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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tracker->priv->version == TRACKER_0_9)
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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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if (tracker->priv->connection)
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{
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g_object_unref (tracker->priv->connection);
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tracker->priv->connection = NULL;
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}
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G_OBJECT_CLASS (_gtk_search_engine_tracker_parent_class)->finalize (object);
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}
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static GDBusConnection *
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get_connection (void)
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{
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GDBusConnection *connection;
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GError *error = NULL;
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GVariant *reply;
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/* Normally I hate sync calls with UIs, but we need to return NULL
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* or a GtkSearchEngine as a result of this function.
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*/
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connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
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if (error)
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{
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g_debug ("Couldn't connect to D-Bus session bus, %s", error->message);
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g_error_free (error);
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return NULL;
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}
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/* If connection is set, we know it worked. */
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g_debug ("Finding out if Tracker is available via D-Bus...");
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/* We only wait 1 second max, we expect it to be very fast. If we
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* don't get a response by then, clearly we're replaying a journal
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* or cleaning up the DB internally. Either way, services is not
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* available.
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*
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* We use the sync call here because we don't expect to be waiting
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* long enough to block UI painting.
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*/
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reply = g_dbus_connection_call_sync (connection,
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DBUS_SERVICE_STATUS,
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DBUS_PATH_STATUS,
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DBUS_INTERFACE_STATUS,
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"Wait",
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NULL,
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NULL,
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G_DBUS_CALL_FLAGS_NONE,
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WAIT_TIMEOUT_SECONDS * 1000,
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NULL,
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&error);
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if (error)
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{
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g_debug ("Tracker is not available, %s", error->message);
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g_error_free (error);
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g_object_unref (connection);
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return NULL;
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}
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g_variant_unref (reply);
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g_debug ("Tracker is ready");
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return connection;
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}
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static void
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get_query_results (GtkSearchEngineTracker *engine,
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const gchar *sparql,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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g_dbus_connection_call (engine->priv->connection,
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DBUS_SERVICE_RESOURCES,
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DBUS_PATH_RESOURCES,
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DBUS_INTERFACE_RESOURCES,
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"SparqlQuery",
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g_variant_new ("(s)", sparql),
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NULL,
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G_DBUS_CALL_FLAGS_NONE,
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QUERY_TIMEOUT_SECONDS * 1000,
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engine->priv->cancellable,
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callback,
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user_data);
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}
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/* Stolen from libtracker-common */
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static GList *
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string_list_to_gslist (gchar **strv)
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{
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GList *list;
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gsize i;
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list = NULL;
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for (i = 0; strv[i]; i++)
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list = g_list_prepend (list, g_strdup (strv[i]));
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return g_list_reverse (list);
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}
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/* Stolen from libtracker-sparql */
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static gchar *
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sparql_escape_string (const gchar *literal)
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{
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GString *str;
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const gchar *p;
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g_return_val_if_fail (literal != NULL, NULL);
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str = g_string_new ("");
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p = literal;
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while (TRUE)
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{
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gsize len;
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if (!((*p) != '\0'))
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break;
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len = strcspn ((const gchar *) p, "\t\n\r\b\f\"\\");
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g_string_append_len (str, (const gchar *) p, (gssize) ((glong) len));
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p = p + len;
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switch (*p)
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{
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case '\t':
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g_string_append (str, "\\t");
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break;
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case '\n':
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g_string_append (str, "\\n");
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break;
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case '\r':
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g_string_append (str, "\\r");
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break;
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case '\b':
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g_string_append (str, "\\b");
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break;
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case '\f':
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g_string_append (str, "\\f");
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break;
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case '"':
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g_string_append (str, "\\\"");
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break;
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case '\\':
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g_string_append (str, "\\\\");
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break;
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default:
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continue;
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}
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p++;
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}
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return g_string_free (str, FALSE);
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}
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/* stolen from tracker sources, tracker.c */
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static void
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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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gchar *s;
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s = tracker_sparql_escape (str);
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s = sparql_escape_string (str);
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g_string_append_c (sparql, '"');
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g_string_append (sparql, s);
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@ -216,26 +259,38 @@ sparql_append_string_literal (GString *sparql,
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g_free (s);
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}
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static void
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sparql_append_string_literal_lower_case (GString *sparql,
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const gchar *str)
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{
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gchar *s;
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s = g_utf8_strdown (str, -1);
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sparql_append_string_literal (sparql, s);
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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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query_callback (GObject *object,
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GAsyncResult *res,
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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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GList *hits;
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GVariant *reply;
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GVariant *r;
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GVariantIter iter;
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gchar **result;
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GError *error = NULL;
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gint i, n;
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gdk_threads_enter ();
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tracker = GTK_SEARCH_ENGINE_TRACKER (user_data);
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hit_uris = NULL;
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tracker->priv->query_pending = FALSE;
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reply = g_dbus_connection_call_finish (tracker->priv->connection, res, &error);
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if (error)
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{
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_gtk_search_engine_error (GTK_SEARCH_ENGINE (tracker), error->message);
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@ -244,123 +299,104 @@ search_callback (gpointer results,
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return;
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}
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if (!results)
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if (!reply)
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{
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_gtk_search_engine_finished (GTK_SEARCH_ENGINE (tracker));
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gdk_threads_leave ();
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return;
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}
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if (tracker->priv->version == TRACKER_0_8 ||
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tracker->priv->version == TRACKER_0_9)
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r = g_variant_get_child_value (reply, 0);
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g_variant_iter_init (&iter, r);
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n = g_variant_iter_n_children (&iter);
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result = g_new0 (gchar *, n + 1);
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for (i = 0; i < n; i++)
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{
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OUT_result = (GPtrArray*) results;
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GVariant *v;
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const gchar **strv;
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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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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 = g_strdup (*results_p);
|
||||
|
||||
if (uri)
|
||||
hit_uris = g_list_prepend (hit_uris, uri);
|
||||
}
|
||||
g_strfreev ((gchar **) results);
|
||||
v = g_variant_iter_next_value (&iter);
|
||||
strv = g_variant_get_strv (v, NULL);
|
||||
result[i] = (gchar*)strv[0];
|
||||
g_free (strv);
|
||||
}
|
||||
|
||||
_gtk_search_engine_hits_added (GTK_SEARCH_ENGINE (tracker), hit_uris);
|
||||
/* We iterate result by result, not n at a time. */
|
||||
hits = string_list_to_gslist (result);
|
||||
_gtk_search_engine_hits_added (GTK_SEARCH_ENGINE (tracker), hits);
|
||||
_gtk_search_engine_finished (GTK_SEARCH_ENGINE (tracker));
|
||||
|
||||
g_list_foreach (hit_uris, (GFunc) g_free, NULL);
|
||||
g_list_free (hit_uris);
|
||||
g_list_free (hits);
|
||||
g_free (result);
|
||||
g_variant_unref (reply);
|
||||
g_variant_unref (r);
|
||||
|
||||
gdk_threads_leave ();
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
gtk_search_engine_tracker_start (GtkSearchEngine *engine)
|
||||
{
|
||||
GtkSearchEngineTracker *tracker;
|
||||
gchar *search_text, *location, *location_uri;
|
||||
gchar *search_text;
|
||||
#ifdef FTS_MATCHING
|
||||
gchar *location_uri;
|
||||
#endif
|
||||
GString *sparql;
|
||||
|
||||
tracker = GTK_SEARCH_ENGINE_TRACKER (engine);
|
||||
|
||||
if (tracker->priv->query_pending)
|
||||
return;
|
||||
{
|
||||
g_debug ("Attempt to start a new search while one is pending, doing nothing");
|
||||
return;
|
||||
}
|
||||
|
||||
if (tracker->priv->query == NULL)
|
||||
return;
|
||||
{
|
||||
g_debug ("Attempt to start a new search with no GtkQuery, doing nothing");
|
||||
return;
|
||||
}
|
||||
|
||||
search_text = _gtk_query_get_text (tracker->priv->query);
|
||||
location_uri = _gtk_query_get_location (tracker->priv->query);
|
||||
|
||||
location = NULL;
|
||||
#ifdef FTS_MATCHING
|
||||
location_uri = _gtk_query_get_location (tracker->priv->query);
|
||||
/* Using FTS: */
|
||||
sparql = g_string_new ("SELECT nie:url(?urn) "
|
||||
"WHERE {"
|
||||
" ?urn a nfo:FileDataObject ;"
|
||||
" tracker:available true ; "
|
||||
" fts:match ");
|
||||
sparql_append_string_literal (sparql, search_text);
|
||||
|
||||
if (location_uri)
|
||||
{
|
||||
if (tracker->priv->version == TRACKER_0_6)
|
||||
{
|
||||
location = g_filename_from_uri (location_uri, NULL, NULL);
|
||||
g_free (location_uri);
|
||||
}
|
||||
else
|
||||
location = location_uri;
|
||||
g_string_append (sparql, " . FILTER (fn:starts-with(nie:url(?urn),");
|
||||
sparql_append_string_literal (sparql, location_uri);
|
||||
g_string_append (sparql, "))");
|
||||
}
|
||||
|
||||
if (tracker->priv->version == TRACKER_0_8 ||
|
||||
tracker->priv->version == TRACKER_0_9)
|
||||
{
|
||||
sparql = g_string_new ("SELECT nie:url(?urn) WHERE { ?urn a nfo:FileDataObject; fts:match ");
|
||||
sparql_append_string_literal (sparql, search_text);
|
||||
if (location)
|
||||
{
|
||||
g_string_append (sparql, " . FILTER (fn:starts-with(nie:url(?urn),");
|
||||
sparql_append_string_literal (sparql, location);
|
||||
g_string_append (sparql, "))");
|
||||
}
|
||||
g_string_append (sparql, " } ORDER BY DESC(fts:rank(?urn)) ASC(nie:url(?urn))");
|
||||
g_string_append (sparql, " } ORDER BY DESC(fts:rank(?urn)) ASC(nie:url(?urn))");
|
||||
#else /* FTS_MATCHING */
|
||||
/* Using filename matching: */
|
||||
sparql = g_string_new ("SELECT nie:url(?urn) "
|
||||
"WHERE {"
|
||||
" ?urn a nfo:FileDataObject ;"
|
||||
" tracker:available true ."
|
||||
" FILTER (fn:contains(fn:lower-case(nfo:fileName(?urn)),");
|
||||
sparql_append_string_literal_lower_case (sparql, search_text);
|
||||
|
||||
tracker_resources_sparql_query_async (tracker->priv->client,
|
||||
sparql->str,
|
||||
(TrackerReplyGPtrArray) search_callback,
|
||||
tracker);
|
||||
g_string_free (sparql, TRUE);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (location)
|
||||
{
|
||||
tracker_search_metadata_by_text_and_location_async (tracker->priv->client,
|
||||
search_text,
|
||||
location,
|
||||
(TrackerArrayReply) search_callback,
|
||||
tracker);
|
||||
}
|
||||
else
|
||||
{
|
||||
tracker_search_metadata_by_text_async (tracker->priv->client,
|
||||
search_text,
|
||||
(TrackerArrayReply) search_callback,
|
||||
tracker);
|
||||
}
|
||||
}
|
||||
g_string_append (sparql,
|
||||
"))"
|
||||
"} ORDER BY DESC(nie:url(?urn)) DESC(nfo:fileName(?urn))");
|
||||
#endif /* FTS_MATCHING */
|
||||
|
||||
tracker->priv->query_pending = TRUE;
|
||||
|
||||
get_query_results (tracker, sparql->str, query_callback, tracker);
|
||||
|
||||
g_string_free (sparql, TRUE);
|
||||
g_free (search_text);
|
||||
g_free (location);
|
||||
}
|
||||
|
||||
static void
|
||||
@ -372,7 +408,7 @@ gtk_search_engine_tracker_stop (GtkSearchEngine *engine)
|
||||
|
||||
if (tracker->priv->query && tracker->priv->query_pending)
|
||||
{
|
||||
tracker_cancel_last_call (tracker->priv->client);
|
||||
g_cancellable_cancel (tracker->priv->cancellable);
|
||||
tracker->priv->query_pending = FALSE;
|
||||
}
|
||||
}
|
||||
@ -385,7 +421,7 @@ gtk_search_engine_tracker_is_indexed (GtkSearchEngine *engine)
|
||||
|
||||
static void
|
||||
gtk_search_engine_tracker_set_query (GtkSearchEngine *engine,
|
||||
GtkQuery *query)
|
||||
GtkQuery *query)
|
||||
{
|
||||
GtkSearchEngineTracker *tracker;
|
||||
|
||||
@ -415,13 +451,16 @@ _gtk_search_engine_tracker_class_init (GtkSearchEngineTrackerClass *class)
|
||||
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));
|
||||
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);
|
||||
engine->priv = G_TYPE_INSTANCE_GET_PRIVATE (engine,
|
||||
GTK_TYPE_SEARCH_ENGINE_TRACKER,
|
||||
GtkSearchEngineTrackerPrivate);
|
||||
}
|
||||
|
||||
|
||||
@ -429,49 +468,21 @@ GtkSearchEngine *
|
||||
_gtk_search_engine_tracker_new (void)
|
||||
{
|
||||
GtkSearchEngineTracker *engine;
|
||||
TrackerClient *tracker_client;
|
||||
TrackerVersion version;
|
||||
GError *err = NULL;
|
||||
GDBusConnection *connection;
|
||||
|
||||
version = open_libtracker ();
|
||||
g_debug ("--");
|
||||
|
||||
if (version == TRACKER_0_8 ||
|
||||
version == TRACKER_0_9)
|
||||
{
|
||||
tracker_client = tracker_client_new (TRACKER_CLIENT_ENABLE_WARNINGS, G_MAXINT);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!tracker_connect)
|
||||
return NULL;
|
||||
|
||||
tracker_client = tracker_connect (FALSE, -1);
|
||||
}
|
||||
|
||||
if (!tracker_client)
|
||||
connection = get_connection ();
|
||||
if (!connection)
|
||||
return NULL;
|
||||
|
||||
|
||||
if (version == TRACKER_0_6)
|
||||
{
|
||||
if (!tracker_get_version)
|
||||
return NULL;
|
||||
|
||||
tracker_get_version (tracker_client, &err);
|
||||
|
||||
if (err != NULL)
|
||||
{
|
||||
g_error_free (err);
|
||||
tracker_disconnect (tracker_client);
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
g_debug ("Creating GtkSearchEngineTracker...");
|
||||
|
||||
engine = g_object_new (GTK_TYPE_SEARCH_ENGINE_TRACKER, NULL);
|
||||
|
||||
engine->priv->client = tracker_client;
|
||||
engine->priv->connection = connection;
|
||||
engine->priv->cancellable = g_cancellable_new ();
|
||||
engine->priv->query_pending = FALSE;
|
||||
engine->priv->version = version;
|
||||
|
||||
return GTK_SEARCH_ENGINE (engine);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user