diff options
Diffstat (limited to 'Xamarin.Forms.Maps.WP8/GeocoderBackend.cs')
| -rw-r--r-- | Xamarin.Forms.Maps.WP8/GeocoderBackend.cs | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/Xamarin.Forms.Maps.WP8/GeocoderBackend.cs b/Xamarin.Forms.Maps.WP8/GeocoderBackend.cs new file mode 100644 index 00000000..e46ec702 --- /dev/null +++ b/Xamarin.Forms.Maps.WP8/GeocoderBackend.cs @@ -0,0 +1,95 @@ +using System; +using System.Collections.Generic; +using System.Device.Location; +using System.Linq; +using System.Threading.Tasks; +using Microsoft.Phone.Maps.Services; + +namespace Xamarin.Forms.Maps.WP8 +{ + internal class GeocoderBackend + { + // Eventually this should be sanely set to match either where the map is centered or where the user is. + internal static Position PositionForGeocoding { get; set; } + + public static void Register() + { + Geocoder.GetPositionsForAddressAsyncFunc = GetPositionsForAddress; + Geocoder.GetAddressesForPositionFuncAsync = GetAddressesForPositionAsync; + } + + // Thank you to craig dunn + static string AddressToString(MapAddress address) + { + string building = "", house = "", city = "", country = ""; + + var bldg = new List<string>(); + if (!"".Equals(address.BuildingRoom)) + bldg.Add(address.BuildingRoom); + if (!"".Equals(address.BuildingFloor)) + bldg.Add(address.BuildingFloor); + if (!"".Equals(address.BuildingName)) + bldg.Add(address.BuildingName); + if (!"".Equals(address.BuildingZone)) + bldg.Add(address.BuildingZone); + if (bldg.Count > 0) + building = string.Join(" ", bldg) + Environment.NewLine; + + var hs = new List<string>(); + if (!"".Equals(address.HouseNumber)) + hs.Add(address.HouseNumber); + if (!"".Equals(address.Street)) + hs.Add(address.Street); + if (hs.Count > 0) + house = string.Join(" ", hs) + Environment.NewLine; + + var cs = new List<string>(); + if (!"".Equals(address.City)) + cs.Add(address.City); + if (!"".Equals(address.State)) + cs.Add(address.State); + else if (!"".Equals(address.Province)) + cs.Add(address.Province); + if (!"".Equals(address.PostalCode)) + cs.Add(address.PostalCode); + if (cs.Count > 0) + city = string.Join(" ", cs) + Environment.NewLine; + + if (!"".Equals(address.Country)) + country = address.Country; + return building + house + city + country; + } + + static Task<IEnumerable<string>> GetAddressesForPositionAsync(Position position) + { + var source = new TaskCompletionSource<IEnumerable<string>>(); + + var query = new ReverseGeocodeQuery + { + GeoCoordinate = new GeoCoordinate(position.Latitude, position.Longitude) + }; + query.QueryCompleted += + (sender, args) => source.SetResult(args.Result.Select(r => AddressToString(r.Information.Address)).ToArray()); + query.QueryAsync(); + + return source.Task; + } + + static Task<IEnumerable<Position>> GetPositionsForAddress(string s) + { + var source = new TaskCompletionSource<IEnumerable<Position>>(); + var query = new GeocodeQuery + { + SearchTerm = s, + GeoCoordinate = new GeoCoordinate(PositionForGeocoding.Latitude, PositionForGeocoding.Longitude) + }; + query.QueryCompleted += + (sender, args) => + source.SetResult( + args.Result.Select(r => new Position(r.GeoCoordinate.Latitude, r.GeoCoordinate.Longitude)).ToArray()); + query.QueryAsync(); + + return source.Task; + } + } +}
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