Merge Geoclue location provider by Mathieu Trudel-Lapierre with some tweaks.

1 files changed, 186 insertions, 0 deletions

diff --git a/src/location-geoclue.c b/src/location-geoclue.c
new file mode 100644
index 0000000..6946dd8
--- /dev/null
+++ b/src/location-geoclue.c
@@ -0,0 +1,186 @@
+/* location-geoclue.c -- Geoclue location provider source
+   This file is part of Redshift.
+
+   Redshift is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Redshift 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2010  Mathieu Trudel-Lapierre <mathieu-tl@ubuntu.com>
+*/
+
+#include <stdio.h>
+#include <string.h>
+
+#include <geoclue/geoclue-master.h>
+#include <geoclue/geoclue-position.h>
+
+#include "location-geoclue.h"
+
+#ifdef ENABLE_NLS
+# include <libintl.h>
+# define _(s) gettext(s)
+#else
+# define _(s) s
+#endif
+
+#define DEFAULT_PROVIDER "org.freedesktop.Geoclue.Providers.UbuntuGeoIP"
+#define DEFAULT_PROVIDER_PATH "/org/freedesktop/Geoclue/Providers/UbuntuGeoIP"
+
+int
+location_geoclue_init(location_geoclue_state_t *state)
+{
+	g_type_init();
+	
+	state->position = NULL;
+	state->provider = NULL;
+	state->provider_path = NULL;
+	
+	return 0;
+}
+
+int
+location_geoclue_start(location_geoclue_state_t *state)
+{
+	GeoclueMaster *master = NULL;
+	GeoclueMasterClient *client = NULL;
+	GError *error = NULL;
+	gchar *name = NULL;
+
+        if (!(state->provider && state->provider_path)) {
+		master = geoclue_master_get_default();
+		client = geoclue_master_create_client(master, NULL, NULL);
+
+		if (!geoclue_master_client_set_requirements(client,
+							    GEOCLUE_ACCURACY_LEVEL_REGION,
+							    0, FALSE,
+							    GEOCLUE_RESOURCE_NETWORK,
+							    &error)) {
+			g_printerr(_("Can't set requirements for master: %s"),
+				   error->message);
+			g_error_free(error);
+			g_object_unref(client);
+
+			return -1;
+		}
+
+		state->position = geoclue_master_client_create_position(client, NULL);
+	} else {
+		state->position = geoclue_position_new(state->provider,
+						       state->provider_path);
+        }
+
+	if (geoclue_provider_get_provider_info(GEOCLUE_PROVIDER(state->position),
+					       &name, NULL, NULL)) {
+		fprintf(stdout, _("Started Geoclue provider `%s'.\n"), name);
+		g_free(name);
+	} else {
+		fputs(_("Could not find a usable Geoclue provider.\n"), stderr);
+		fputs(_("Try setting name and path to specify which to use.\n"), stderr);
+		return -1;
+	}
+
+	return 0;
+}
+
+void
+location_geoclue_free(location_geoclue_state_t *state)
+{
+	if (state->position != NULL) g_object_unref(state->position);
+}
+
+void
+location_geoclue_print_help(FILE *f)
+{
+	fputs(_("Use the location as discovered by a Geoclue provider.\n"), f);
+	fputs("\n", f);
+
+	/* TRANSLATORS: Geoclue help output
+	   left column must not be translated */
+	fputs(_("  name=N\tName of Geoclue provider (or `default')\n"
+		"  path=N\tPath of Geoclue provider (or `default')\n"), f);
+	fputs("\n", f);
+}
+
+int
+location_geoclue_set_option(location_geoclue_state_t *state,
+			    const char *key, const char *value)
+{
+	const char *provider = NULL;
+	const char *path = NULL;
+
+	/* Parse string value */
+	if (key != NULL && strcasecmp(key, "name") == 0) {
+		if (value != NULL && strcasecmp(value, "default") == 0) {
+			provider = DEFAULT_PROVIDER;
+		} else if (value != NULL) {
+			provider = value;
+		} else {
+			fputs(_("Must specify a provider `name' (or use `default').\n"), stderr);
+			return -1;
+		}
+
+		/* TODO I don't think we own the string here, should be copied. */
+		state->provider = provider;
+	} else if (key != NULL && strcasecmp(key, "path") == 0) {
+		if (value != NULL && strcasecmp(value, "default") == 0) {
+			path = DEFAULT_PROVIDER_PATH;
+		} else if (value != NULL) {
+			path = value;
+		} else {
+			fputs(_("Must specify a provider `path' (or use `default').\n"), stderr);
+			return -1;
+		}
+
+		/* TODO I don't think we own the string here, should be copied. */
+		state->provider_path = path;
+	} else if (key == NULL) {
+		return -1;
+	} else {
+		fprintf(stderr, _("Unknown method parameter: `%s'.\n"), key);
+		return -1;
+	}
+
+	return 0;
+}
+
+int
+location_geoclue_get_location(location_geoclue_state_t *state,
+			      float *lat, float *lon)
+{
+	GeocluePositionFields fields;
+	GError *error = NULL;
+	double latitude = 0, longitude = 0;
+
+	fields = geoclue_position_get_position(state->position, NULL,
+					       &latitude, &longitude, NULL,
+					       NULL, &error);
+	if (error) {
+		g_printerr(_("Could not get location: %s.\n"), error->message);
+		g_error_free(error);
+		return -1;
+	}
+	
+	if (fields & GEOCLUE_POSITION_FIELDS_LATITUDE &&
+	    fields & GEOCLUE_POSITION_FIELDS_LONGITUDE) {
+		fprintf(stdout, _("According to the geoclue provider"
+				  " we're at: %.2f, %.2f\n"),
+			latitude, longitude);
+	} else {
+		g_warning(_("Provider does not have a valid location available."));
+		return -1;
+	}
+
+	*lat = latitude;
+	*lon = longitude;
+
+	return 0;
+}