Add CoreLocation (OSX) location provider

Similarly to the Geoclue provider, the CoreLocation provider only
requests the location on startup.

1 files changed, 163 insertions, 0 deletions

diff --git a/src/location-corelocation.m b/src/location-corelocation.m
new file mode 100644
index 0000000..626949c
--- /dev/null
+++ b/src/location-corelocation.m
@@ -0,0 +1,163 @@
+/* location-corelocation.m -- CoreLocation (OSX) 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) 2014  Jon Lund Steffensen <jonlst@gmail.com>
+*/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#import <Foundation/Foundation.h>
+#import <CoreLocation/CoreLocation.h>
+
+#include "location-corelocation.h"
+
+#include <stdio.h>
+
+#ifdef ENABLE_NLS
+# include <libintl.h>
+# define _(s) gettext(s)
+#else
+# define _(s) s
+#endif
+
+
+@interface Delegate : NSObject <CLLocationManagerDelegate>
+@property (strong, nonatomic) CLLocationManager *locationManager;
+@property (nonatomic) BOOL success;
+@property (nonatomic) float latitude;
+@property (nonatomic) float longitude;
+@end
+
+@implementation Delegate;
+
+- (void)start
+{
+	self.locationManager = [[CLLocationManager alloc] init];
+	self.locationManager.delegate = self;
+
+	CLAuthorizationStatus authStatus =
+		[CLLocationManager authorizationStatus];
+
+	if (authStatus != kCLAuthorizationStatusNotDetermined &&
+	    authStatus != kCLAuthorizationStatusAuthorized) {
+		fputs(_("Not authorized to obtain location"
+			"from CoreLocation.\n"), stderr);
+		CFRunLoopStop(CFRunLoopGetCurrent());
+	}
+
+	[self.locationManager startUpdatingLocation];
+}
+
+- (void)stop
+{
+	[self.locationManager stopUpdatingLocation];
+	CFRunLoopStop(CFRunLoopGetCurrent());
+}
+
+- (void)locationManager:(CLLocationManager *)manager
+     didUpdateLocations:(NSArray *)locations
+{
+	CLLocation *newLocation = [locations firstObject];
+	self.latitude = newLocation.coordinate.latitude;
+	self.longitude = newLocation.coordinate.longitude;
+	self.success = YES;
+
+	[self stop];
+}
+
+- (void)locationManager:(CLLocationManager *)manager
+       didFailWithError:(NSError *)error
+{
+	fprintf(stderr, _("Error obtaining location from CoreLocation: %s\n"),
+	       [[error localizedDescription] UTF8String]);
+	[self stop];
+}
+
+- (void)locationManager:(CLLocationManager *)manager
+       didChangeAuthorizationStatus:(CLAuthorizationStatus)status
+{
+	if (status == kCLAuthorizationStatusNotDetermined) {
+		fputs(_("Waiting for authorization to obtain location...\n"),
+		      stderr);
+	} else if (status != kCLAuthorizationStatusAuthorized) {
+		fputs(_("Request for location was not authorized!\n"),
+		      stderr);
+		[self stop];
+	}
+}
+
+@end
+
+
+int
+location_corelocation_init(void *state)
+{
+	return 0;
+}
+
+int
+location_corelocation_start(void *state)
+{
+	return 0;
+}
+
+void
+location_corelocation_free(void *state)
+{
+}
+
+void
+location_corelocation_print_help(FILE *f)
+{
+	fputs(_("Use the location as discovered by the Corelocation provider.\n"), f);
+	fputs("\n", f);
+
+	fputs(_("NOTE: currently redshift doesn't recheck CoreLocation once started,\n"
+		"which means it has to be restarted to take notice after travel.\n"),
+	      f);
+	fputs("\n", f);
+}
+
+int
+location_corelocation_set_option(void *state,
+				 const char *key, const char *value)
+{
+	fprintf(stderr, _("Unknown method parameter: `%s'.\n"), key);
+	return -1;
+}
+
+int
+location_corelocation_get_location(void *state,
+				   float *lat, float *lon)
+{
+	int result = -1;
+
+	@autoreleasepool {
+		Delegate *delegate = [[Delegate alloc] init];
+		[delegate performSelectorOnMainThread:@selector(start) withObject:nil waitUntilDone:NO];
+		CFRunLoopRun();
+
+		if (delegate.success) {
+			*lat = delegate.latitude;
+			*lon = delegate.longitude;
+			result = 0;
+		}
+	}
+
+	return result;
+}