Add MapRenderer to enable Xamarin.Forms.Maps on Tizen

    - Implementation of MapRenderer under Xamarin.Forms.Maps.Tizen
    - Implementation of FormsMaps to initialize Tizen Map
    - Implementation of GeocoderBackend

TASK=TCAPI2044

Change-Id: I4b6f15b5190767ca0c92bb27c383af5f66ae5328

6 files changed, 315 insertions, 88 deletions

diff --git a/Xamarin.Forms.Maps.Tizen/FormsMaps.cs b/Xamarin.Forms.Maps.Tizen/FormsMaps.cs
index b41b50d8..0fd7029c 100755
--- a/Xamarin.Forms.Maps.Tizen/FormsMaps.cs
+++ b/Xamarin.Forms.Maps.Tizen/FormsMaps.cs
@@ -1,19 +1,49 @@
-using Xamarin.Forms.Maps.Tizen;
+using System.Diagnostics;
+using Tizen.Maps;
+using Xamarin.Forms.Maps.Tizen;
 
 namespace Xamarin
 {
-    public static class FormsMaps
-    {
-        public static bool IsInitialized { get; private set; }
+	public static class FormsMaps
+	{
+		static MapService _mapService = null;
 
-        public static void Init()
-        {
-            if (IsInitialized)
-                return;
+		static string ProviderName { get; set; }
 
-            IsInitialized = true;
+		static string AuthenticationToken { get; set; }
 
-            GeocoderBackend.Register();
-        }
-    }
+		internal static bool IsInitialized { get; private set; }
+
+		internal static MapService MapService
+		{
+			get
+			{
+				Debug.Assert(_mapService != null, "FormsMaps is not initialized");
+				return _mapService;
+			}
+		}
+
+		public static void Init(string provider, string authenticationToken)
+		{
+			ProviderName = provider;
+			AuthenticationToken = authenticationToken;
+			Init();
+		}
+
+		internal static async void Init()
+		{
+			if (IsInitialized)
+				return;
+			var requestResult = await MapService.RequestUserConsent(ProviderName);
+			if (requestResult)
+			{
+				_mapService = new MapService(ProviderName, AuthenticationToken);
+				if (_mapService != null)
+				{
+					GeocoderBackend.Register();
+					IsInitialized = true;
+				}
+			}
+		}
+	}
 }
\ No newline at end of file
diff --git a/Xamarin.Forms.Maps.Tizen/GeocoderBackend.cs b/Xamarin.Forms.Maps.Tizen/GeocoderBackend.cs
index a18990d4..dbf93979 100644..100755
--- a/Xamarin.Forms.Maps.Tizen/GeocoderBackend.cs
+++ b/Xamarin.Forms.Maps.Tizen/GeocoderBackend.cs
@@ -1,25 +1,32 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
-using System;
 
 namespace Xamarin.Forms.Maps.Tizen
 {
-    public class Position {};
+	internal class GeocoderBackend
+	{
+		public static void Register()
+		{
+			Geocoder.GetPositionsForAddressAsyncFunc = GetPositionsForAddressAsync;
+			Geocoder.GetAddressesForPositionFuncAsync = GetAddressesForPositionAsync;
+		}
 
-    internal class GeocoderBackend
-    {
-        public static void Register()
-        {
-        }
+		public static async Task<IEnumerable<Position>> GetPositionsForAddressAsync(string address)
+		{
+			var request = FormsMaps.MapService.CreateGeocodeRequest(address);
+			var positions = new List<Position>();
+			foreach (var result in await request.GetResponseAsync())
+				positions.Add(new Position(result.Latitude, result.Longitude));
+			return positions;
+		}
 
-        public static async Task<IEnumerable<Position>> GetPositionsForAddressAsync(string address)
-        {
-            return new Position[]{};
-        }
-
-        public static async Task<IEnumerable<string>> GetAddressesForPositionAsync(Position position)
-        {
-            return new String[]{"Not supported"};
-        }
-    }
+		public static async Task<IEnumerable<string>> GetAddressesForPositionAsync(Position position)
+		{
+			var request = FormsMaps.MapService.CreateReverseGeocodeRequest(position.Latitude, position.Longitude);
+			var addresses = new List<string>();
+			foreach (var result in await request.GetResponseAsync())
+				addresses.Add(result.Freetext);
+			return addresses;
+		}
+	}
 }
\ No newline at end of file
diff --git a/Xamarin.Forms.Maps.Tizen/MapControl.cs b/Xamarin.Forms.Maps.Tizen/MapControl.cs
deleted file mode 100755
index a10bb804..00000000
--- a/Xamarin.Forms.Maps.Tizen/MapControl.cs
+++ /dev/null
@@ -1,14 +0,0 @@
-using TLabel = Xamarin.Forms.Platform.Tizen.Native.Label;
-
-namespace Xamarin.Forms.Maps.Tizen
-{
-    public class MapControl : TLabel
-    {
-        public MapControl(ElmSharp.EvasObject parent) : base(parent)
-        {
-            Text = "Can not supported Maps";
-            TextColor = ElmSharp.Color.Red;
-        }
-    }
-}
-
diff --git a/Xamarin.Forms.Maps.Tizen/MapRenderer.cs b/Xamarin.Forms.Maps.Tizen/MapRenderer.cs
index b7278dcc..d61f6a27 100755
--- a/Xamarin.Forms.Maps.Tizen/MapRenderer.cs
+++ b/Xamarin.Forms.Maps.Tizen/MapRenderer.cs
@@ -1,47 +1,250 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using ElmSharp;
+using Tizen.Location;
+using Tizen.Maps;
 using Xamarin.Forms.Platform.Tizen;
-using TForms = Xamarin.Forms.Platform.Tizen.Forms;
 
 namespace Xamarin.Forms.Maps.Tizen
 {
-    public class MapRenderer : ViewRenderer<Map, MapControl>
-    {
-        public MapRenderer()
-        {
-            RegisterPropertyHandler(Map.MapTypeProperty, UpdateMapType);
-            RegisterPropertyHandler(Map.IsShowingUserProperty, UpdateIsShowingUser);
-            RegisterPropertyHandler(Map.HasScrollEnabledProperty, UpdateHasScrollEnabled);
-            RegisterPropertyHandler(Map.HasZoomEnabledProperty, UpdateHasZoomEnabled);
-        }
-
-        protected override void OnElementChanged(ElementChangedEventArgs<Map> e)
-        {
-            base.OnElementChanged(e);
-
-            if (Control == null)
-            {
-                var mapControl = new MapControl(TForms.Context.MainWindow);
-                SetNativeControl(mapControl);
-            }
-        }
-
-        void UpdateMapType()
-        {
-            // TODO
-        }
-
-        void UpdateIsShowingUser()
-        {
-            // TODO
-        }
-
-        void UpdateHasScrollEnabled()
-        {
-            // TODO
-        }
-
-        void UpdateHasZoomEnabled()
-        {
-            // TODO
-        }
-    }
+	public class MapRenderer : ViewRenderer<Map, MapView>
+	{
+		const string MoveMessageName = "MapMoveToRegion";
+
+		bool _disposed;
+		Overlay _marker;
+		bool _isLocatorStarted = false;
+		Lazy<Locator> _locator = new Lazy<Locator>(InitializeLocator);
+		Dictionary<Pin, MapObject> _pins = new Dictionary<Pin, MapObject>();
+
+		static Locator InitializeLocator()
+		{
+			var locator = new Locator(LocationType.Hybrid)
+			{
+				// Set the default interval to 15s same as UWP
+				Interval = 15
+			};
+			return locator;
+		}
+
+		public MapRenderer()
+		{
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<Map> e)
+		{
+			if (Control == null)
+			{
+				var mapControl = new MapView(Platform.Tizen.Forms.Context.MainWindow, FormsMaps.MapService);
+				SetNativeControl(mapControl);
+			}
+
+			if (e.OldElement != null)
+			{
+				((ObservableCollection<Pin>)e.OldElement.Pins).CollectionChanged -= OnCollectionChanged;
+
+				MessagingCenter.Unsubscribe<Map, MapSpan>(this, MoveMessageName);
+			}
+			if (e.NewElement != null)
+			{
+				((ObservableCollection<Pin>)e.NewElement.Pins).CollectionChanged += OnCollectionChanged;
+				if (e.NewElement.Pins.Count > 0)
+				{
+					AddPins(e.NewElement.Pins);
+				}
+
+				MessagingCenter.Subscribe<Map, MapSpan>(this, MoveMessageName, OnMoveToRegion, e.NewElement);
+
+				UpdateMapType();
+				UpdateHasScrollEnabled();
+				UpdateHasZoomEnabled();
+				UpdateIsShowingUser();
+			}
+			base.OnElementChanged(e);
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			if (_disposed)
+			{
+				return;
+			}
+
+			_disposed = true;
+
+			if (disposing)
+			{
+				MessagingCenter.Unsubscribe<Map, MapSpan>(this, "MapMoveToRegion");
+				if (Element != null)
+				{
+					((ObservableCollection<Pin>)Element.Pins).CollectionChanged -= OnCollectionChanged;
+				}
+				Control.Unrealize();
+			}
+			base.Dispose(disposing);
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == Map.MapTypeProperty.PropertyName)
+				UpdateMapType();
+			else if (e.PropertyName == Map.IsShowingUserProperty.PropertyName)
+				UpdateIsShowingUser();
+			else if (e.PropertyName == Map.HasScrollEnabledProperty.PropertyName)
+				UpdateHasScrollEnabled();
+			else if (e.PropertyName == Map.HasZoomEnabledProperty.PropertyName)
+				UpdateHasZoomEnabled();
+		}
+
+		void OnMoveToRegion(Map map, MapSpan span)
+		{
+			var newCenter = new Geocoordinates(span.Center.Latitude, span.Center.Longitude);
+			Control.Center = newCenter;
+		}
+
+
+		void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+		{
+			if (e.NewItems != null)
+			{
+				AddPins(e.NewItems);
+			}
+			if (e.OldItems != null)
+			{
+				RemovePins(e.OldItems);
+			}
+			if (e.Action == NotifyCollectionChangedAction.Reset)
+			{
+				ClearPins();
+			}
+		}
+
+		void AddPins(IEnumerable pins)
+		{
+			foreach (Pin pin in pins)
+			{
+				var coordinates = new Geocoordinates(pin.Position.Latitude, pin.Position.Longitude);
+				var rectangle = new Background(Platform.Tizen.Forms.Context.MainWindow);
+				// TODO: Need to change BubbleOverlay to default Marker
+				// TODO: Need to handle Pin.Clicked event
+				var nativePin = new BubbleOverlay(coordinates, rectangle);
+				Control.Add(nativePin);
+				_pins.Add(pin, nativePin);
+			}
+		}
+
+		void RemovePins(IEnumerable pins)
+		{
+			foreach (Pin pin in pins)
+			{
+				if (_pins.ContainsKey(pin))
+				{
+					Control.Remove(_pins[pin]);
+					_pins.Remove(pin);
+				}
+			}
+		}
+
+		void ClearPins()
+		{
+			foreach (var pin in _pins)
+			{
+				Control.Remove(pin.Value);
+			}
+			_pins.Clear();
+		}
+
+		void UpdateHasZoomEnabled()
+		{
+			if (Element.HasZoomEnabled == true)
+				Control.ZoomChanged += Dummy;
+			else
+				Control.ZoomChanged -= Dummy;
+		}
+
+		void UpdateHasScrollEnabled()
+		{
+			if (Element.HasScrollEnabled == true)
+				Control.Scrolled += Dummy;
+			else
+				Control.Scrolled -= Dummy;
+		}
+
+		void Dummy(object sender, MapGestureEventArgs e)
+		{
+			//TODO: The implementation of Tizen.Maps needs to be changed to remove this method
+		}
+
+		void ApplyIsShowingUser(Geocoordinates coordinates)
+		{
+			if (_marker == null)
+			{
+				var rectangle = new Background(Platform.Tizen.Forms.Context.MainWindow);
+				// TODO: Need to change BubbleOverlay to Default Overlay
+				_marker = new BubbleOverlay(coordinates, rectangle);
+				_marker.IsVisible = false;
+				Control.Add(_marker);
+			}
+			_marker.Coordinates = coordinates;
+
+			if (!_marker.IsVisible)
+			{
+				_marker.IsVisible = true;
+				Control.Center = coordinates;
+				Control.ZoomLevel = 13;
+			}
+		}
+		void UpdateIsShowingUser()
+		{
+			if (Element.IsShowingUser)
+			{
+				_locator.Value.LocationChanged += OnLocationChanged;
+				if (!_isLocatorStarted)
+				{
+					_locator.Value.Start();
+					_isLocatorStarted = true;
+				}
+			}
+			else
+			{
+				if (_locator.IsValueCreated)
+				{
+					_locator.Value.LocationChanged -= OnLocationChanged;
+					_locator.Value.Stop();
+					_isLocatorStarted = false;
+				}
+				if (_marker != null)
+					_marker.IsVisible = false;
+			}
+		}
+
+		void OnLocationChanged(object sender, LocationChangedEventArgs e)
+		{
+			ApplyIsShowingUser(new Geocoordinates(e.Location.Latitude, e.Location.Longitude));
+		}
+
+		void UpdateMapType()
+		{
+			switch (Element.MapType)
+			{
+				case MapType.Street:
+					Control.MapType = MapTypes.Normal;
+					break;
+				case MapType.Satellite:
+					Control.MapType = MapTypes.Satellite;
+					break;
+				case MapType.Hybrid:
+					Control.MapType = MapTypes.Hybrid;
+					break;
+				default:
+					throw new ArgumentOutOfRangeException();
+			}
+		}
+	}
 }
diff --git a/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.csproj b/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.csproj
index 9b163767..98733eeb 100644..100755
--- a/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.csproj
+++ b/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.csproj
@@ -40,7 +40,6 @@
     <Compile Include="FormsMaps.cs" />
     <Compile Include="GeocoderBackend.cs" />
     <Compile Include="MapRenderer.cs" />
-    <Compile Include="MapControl.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Xamarin.Forms.Maps.Tizen.project.json" />
diff --git a/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.project.json b/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.project.json
index f4511fe7..c381ec60 100755
--- a/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.project.json
+++ b/Xamarin.Forms.Maps.Tizen/Xamarin.Forms.Maps.Tizen.project.json
@@ -2,11 +2,13 @@
   "dependencies": {
     "ElmSharp": "1.1.0-*",
     "NETStandard.Library": "1.6.0",
-    "Tizen.Applications": "1.0.2"
+    "Tizen.Applications": "1.0.2",
+    "Tizen.Location": "1.0.3",
+    "Tizen.Maps": "1.0.1"
   },
   "frameworks": {
     "netstandard1.6": {
       "imports": "portable-net45+win8+wpa81+wp8"
     }
   }
-}
+}
\ No newline at end of file