Add support for NativeViews specified in XAML

See: https://developer.xamarin.com/guides/xamarin-forms/user-interface/native-views/

Change-Id: I0a4315cccdaa208585f417db4f91240555a64a47
Signed-off-by: Pawel Andruszkiewicz <p.andruszkie@samsung.com>

6 files changed, 108 insertions, 0 deletions

diff --git a/Xamarin.Forms.Platform.Tizen/EvasObjectWrapper.cs b/Xamarin.Forms.Platform.Tizen/EvasObjectWrapper.cs
index 97cf77f0..526c4739 100644
--- a/Xamarin.Forms.Platform.Tizen/EvasObjectWrapper.cs
+++ b/Xamarin.Forms.Platform.Tizen/EvasObjectWrapper.cs
@@ -11,6 +11,8 @@ namespace Xamarin.Forms.Platform.Tizen
 		{
 			EvasObject = obj;
 			MeasureDelegate = measureDelegate;
+
+			obj.TransferBindablePropertiesToWrapper(this);
 		}
 
 		public EvasObject EvasObject
@@ -20,5 +22,13 @@ namespace Xamarin.Forms.Platform.Tizen
 		}
 
 		public MeasureDelegate MeasureDelegate { get; }
+
+		protected override void OnBindingContextChanged()
+		{
+			// TODO: we should provide a delegate to obtain children of a Container object,
+			//       however currently there is no way to get the list of children
+			EvasObject.SetBindingContext(BindingContext);
+			base.OnBindingContextChanged();
+		}
 	}
 }
diff --git a/Xamarin.Forms.Platform.Tizen/Extensions/NativeBindingExtensions.cs b/Xamarin.Forms.Platform.Tizen/Extensions/NativeBindingExtensions.cs
new file mode 100644
index 00000000..b04894b1
--- /dev/null
+++ b/Xamarin.Forms.Platform.Tizen/Extensions/NativeBindingExtensions.cs
@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+
+using EObject = ElmSharp.EvasObject;
+
+namespace Xamarin.Forms.Platform.Tizen
+{
+	public static class NativeBindingExtensions
+	{
+		public static void SetBinding(this EObject view, string propertyName, BindingBase binding, string updateSourceEventName = null)
+		{
+			NativeBindingHelpers.SetBinding(view, propertyName, binding, updateSourceEventName);
+		}
+
+		public static void SetBinding(this EObject view, BindableProperty targetProperty, BindingBase binding)
+		{
+			NativeBindingHelpers.SetBinding(view, targetProperty, binding);
+		}
+
+		public static void SetValue(this EObject target, BindableProperty targetProperty, object value)
+		{
+			NativeBindingHelpers.SetValue(target, targetProperty, value);
+		}
+
+		public static void SetBindingContext(this EObject target, object bindingContext, Func<EObject, IEnumerable<EObject>> getChildren = null)
+		{
+			NativeBindingHelpers.SetBindingContext(target, bindingContext, getChildren);
+		}
+
+		internal static void TransferBindablePropertiesToWrapper(this EObject target, View wrapper)
+		{
+			NativeBindingHelpers.TransferBindablePropertiesToWrapper(target, wrapper);
+		}
+	}
+}
diff --git a/Xamarin.Forms.Platform.Tizen/NativeBindingService.cs b/Xamarin.Forms.Platform.Tizen/NativeBindingService.cs
new file mode 100644
index 00000000..945726eb
--- /dev/null
+++ b/Xamarin.Forms.Platform.Tizen/NativeBindingService.cs
@@ -0,0 +1,38 @@
+using System;
+
+using EObject = ElmSharp.EvasObject;
+
+namespace Xamarin.Forms.Platform.Tizen
+{
+	class NativeBindingService : Xaml.INativeBindingService
+	{
+		public bool TrySetBinding(object target, string propertyName, BindingBase binding)
+		{
+			var view = target as EObject;
+			if (view == null)
+				return false;
+			if (target.GetType().GetProperty(propertyName)?.GetMethod == null)
+				return false;
+			view.SetBinding(propertyName, binding);
+			return true;
+		}
+
+		public bool TrySetBinding(object target, BindableProperty property, BindingBase binding)
+		{
+			var view = target as EObject;
+			if (view == null)
+				return false;
+			view.SetBinding(property, binding);
+			return true;
+		}
+
+		public bool TrySetValue(object target, BindableProperty property, object value)
+		{
+			var view = target as EObject;
+			if (view == null)
+				return false;
+			view.SetValue(property, value);
+			return true;
+		}
+	}
+}
diff --git a/Xamarin.Forms.Platform.Tizen/NativeValueConverterService.cs b/Xamarin.Forms.Platform.Tizen/NativeValueConverterService.cs
new file mode 100644
index 00000000..956079ea
--- /dev/null
+++ b/Xamarin.Forms.Platform.Tizen/NativeValueConverterService.cs
@@ -0,0 +1,20 @@
+using System;
+
+using EObject = ElmSharp.EvasObject;
+
+namespace Xamarin.Forms.Platform.Tizen
+{
+	class NativeValueConverterService : Xaml.INativeValueConverterService
+	{
+		public bool ConvertTo(object value, Type toType, out object nativeValue)
+		{
+			nativeValue = null;
+			if (typeof(EObject).IsInstanceOfType(value) && toType.IsAssignableFrom(typeof(View)))
+			{
+				nativeValue = ((EObject)value).ToView();
+				return true;
+			}
+			return false;
+		}
+	}
+}
diff --git a/Xamarin.Forms.Platform.Tizen/Properties/AssemblyInfo.cs b/Xamarin.Forms.Platform.Tizen/Properties/AssemblyInfo.cs
index 37e0221a..0b7977f6 100644
--- a/Xamarin.Forms.Platform.Tizen/Properties/AssemblyInfo.cs
+++ b/Xamarin.Forms.Platform.Tizen/Properties/AssemblyInfo.cs
@@ -19,6 +19,8 @@ using Xamarin.Forms.Platform.Tizen;
 
 [assembly: Xamarin.Forms.Dependency(typeof(ResourcesProvider))]
 [assembly: Xamarin.Forms.Dependency(typeof(Deserializer))]
+[assembly: Xamarin.Forms.Dependency(typeof(NativeBindingService))]
+[assembly: Xamarin.Forms.Dependency(typeof(NativeValueConverterService))]
 
 [assembly: ExportRenderer(typeof(Layout), typeof(LayoutRenderer))]
 [assembly: ExportRenderer(typeof(ScrollView), typeof(ScrollViewRenderer))]
diff --git a/Xamarin.Forms.Platform.Tizen/Xamarin.Forms.Platform.Tizen.csproj b/Xamarin.Forms.Platform.Tizen/Xamarin.Forms.Platform.Tizen.csproj
index 012512b1..5c8ac950 100644
--- a/Xamarin.Forms.Platform.Tizen/Xamarin.Forms.Platform.Tizen.csproj
+++ b/Xamarin.Forms.Platform.Tizen/Xamarin.Forms.Platform.Tizen.csproj
@@ -51,6 +51,7 @@
     <Compile Include="Extensions\ColorExtensions.cs" />
     <Compile Include="Extensions\KeyboardExtensions.cs" />
     <Compile Include="Extensions\LayoutExtensions.cs" />
+    <Compile Include="Extensions\NativeBindingExtensions.cs" />
     <Compile Include="Extensions\ScrollToPositionExtensions.cs" />
     <Compile Include="Extensions\TextAlignmentExtensions.cs" />
     <Compile Include="Forms.cs" />
@@ -91,6 +92,8 @@
     <Compile Include="Native\TextHelper.cs" />
     <Compile Include="Native\TimePicker.cs" />
     <Compile Include="Native\Window.cs" />
+    <Compile Include="NativeBindingService.cs" />
+    <Compile Include="NativeValueConverterService.cs" />
     <Compile Include="Platform.cs" />
     <Compile Include="PlatformEffect.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />