Scaffold the Ooui platform

Ooui.Forms/Exports.cs

@@ -4,7 +4,7 @@ using Ooui.Forms.Renderers;
 using Xamarin.Forms;
 using Xamarin.Forms.Internals;
 
-
+[assembly: Dependency (typeof (ResourcesProvider))]
 [assembly: ExportRenderer (typeof (Button), typeof (ButtonRenderer))]
 
 namespace Ooui.Forms

Ooui.Forms/IVisualElementRenderer.cs

@@ -0,0 +1,9 @@
+using System;
+using Xamarin.Forms;
+
+namespace Ooui.Forms
+{
+	public interface IVisualElementRenderer : IRegisterable, IDisposable
+	{
+	}
+}

Ooui.Forms/PageExtensions.cs

@@ -1,26 +1,38 @@
 using System;
+using Xamarin.Forms;
 
-namespace Ooui.Forms
+namespace Xamarin.Forms
 {
 	public static class PageExtensions
 	{
 		public static void Publish (this Xamarin.Forms.Page page, string path)
 		{
-			UI.Publish (path, () => page.CreateElement ());
+			Ooui.UI.Publish (path, () => page.CreateElement ());
 		}
 
 		public static void PublishShared (this Xamarin.Forms.Page page, string path)
 		{
-			var lazyPage = new Lazy<Element> ((() => page.CreateElement ()), true);
-			UI.Publish (path, () => lazyPage.Value);
+			var lazyPage = new Lazy<Ooui.Element> ((() => page.CreateElement ()), true);
+			Ooui.UI.Publish (path, () => lazyPage.Value);
 		}
 
-		public static Element CreateElement (this Xamarin.Forms.Page page)
+		public static Ooui.Element CreateElement (this Xamarin.Forms.Page page)
 		{
 			if (!Xamarin.Forms.Forms.IsInitialized)
 				throw new InvalidOperationException ("call Forms.Init() before this");
 
-			throw new NotImplementedException ();
+			if (!(page.RealParent is Application)) {
+				var app = new DefaultApplication ();
+				app.MainPage = page;
+			}
+
+			var result = new Ooui.Forms.Platform ();
+			result.SetPage (page);
+			return result.Element;
+		}
+
+		class DefaultApplication : Application
+		{
 		}
 	}
 }

Ooui.Forms/Platform.cs

@@ -1,13 +1,31 @@
 using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Ooui.Forms.Renderers;
 using Xamarin.Forms;
 using Xamarin.Forms.Internals;
 
 namespace Ooui.Forms
 {
-	public class Platform : BindableObject, IPlatform, IDisposable
+	public class Platform : BindableObject, IPlatform, INavigation, IDisposable
 	{
 		bool _disposed;
 
+		public Element Element { get; private set; }
+
+		public Page Page { get; private set; }
+
+		IReadOnlyList<Page> INavigation.ModalStack => throw new NotImplementedException ();
+
+		IReadOnlyList<Page> INavigation.NavigationStack => throw new NotImplementedException ();
+
+		public static readonly BindableProperty RendererProperty = BindableProperty.CreateAttached ("Renderer", typeof (IVisualElementRenderer), typeof (Platform), default (IVisualElementRenderer),
+			propertyChanged: (bindable, oldvalue, newvalue) => {
+				var view = bindable as VisualElement;
+				if (view != null)
+					view.IsPlatformEnabled = newvalue != null;
+			});
+
 		void IDisposable.Dispose()
 		{
 			if (_disposed)
@@ -19,9 +37,128 @@ namespace Ooui.Forms
 			MessagingCenter.Unsubscribe<Page, bool>(this, Page.BusySetSignalName);
 		}
 
+		public static IVisualElementRenderer CreateRenderer (VisualElement element)
+		{
+			var renderer = Registrar.Registered.GetHandler<IVisualElementRenderer> (element.GetType ()) ?? new DefaultRenderer ();
+			//renderer.SetElement (element);
+			return renderer;
+		}
+
+		public static IVisualElementRenderer GetRenderer (VisualElement bindable)
+		{
+			return (IVisualElementRenderer)bindable.GetValue (RendererProperty);
+		}
+
+		public static void SetRenderer (VisualElement bindable, IVisualElementRenderer value)
+		{
+			bindable.SetValue (RendererProperty, value);
+		}
+
+		protected override void OnBindingContextChanged ()
+		{
+			SetInheritedBindingContext (Page, BindingContext);
+
+			base.OnBindingContextChanged ();
+		}
+
 		public SizeRequest GetNativeSize(VisualElement view, double widthConstraint, double heightConstraint)
 		{
 			return new SizeRequest(new Size(100, 100));
 		}
+
+		public void SetPage (Page newRoot)
+		{
+			if (newRoot == null)
+				return;
+			if (Page != null)
+				throw new NotImplementedException ();
+			Page = newRoot;
+
+			Page.Platform = this;
+			AddChild (Page);
+
+			//Page.DescendantRemoved += HandleChildRemoved;
+
+			Application.Current.NavigationProxy.Inner = this;
+		}
+
+		void AddChild (VisualElement view)
+		{
+			if (!Application.IsApplicationOrNull (view.RealParent))
+				Console.Error.WriteLine ("Tried to add parented view to canvas directly");
+
+			if (GetRenderer (view) == null) {
+				var viewRenderer = CreateRenderer (view);
+				SetRenderer (view, viewRenderer);
+
+				//_renderer.View.AddSubview (viewRenderer.NativeView);
+				//if (viewRenderer.ViewController != null)
+				//	_renderer.AddChildViewController (viewRenderer.ViewController);
+				//viewRenderer.NativeView.Frame = new RectangleF (0, 0, _renderer.View.Bounds.Width, _renderer.View.Bounds.Height);
+				//viewRenderer.SetElementSize (new Size (_renderer.View.Bounds.Width, _renderer.View.Bounds.Height));
+			}
+			else
+				Console.Error.WriteLine ("Potential view double add");
+		}
+
+		void INavigation.InsertPageBefore (Page page, Page before)
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task<Page> INavigation.PopAsync ()
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task<Page> INavigation.PopAsync (bool animated)
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task<Page> INavigation.PopModalAsync ()
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task<Page> INavigation.PopModalAsync (bool animated)
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task INavigation.PopToRootAsync ()
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task INavigation.PopToRootAsync (bool animated)
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task INavigation.PushAsync (Page page)
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task INavigation.PushAsync (Page page, bool animated)
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task INavigation.PushModalAsync (Page page)
+		{
+			throw new NotImplementedException ();
+		}
+
+		Task INavigation.PushModalAsync (Page page, bool animated)
+		{
+			throw new NotImplementedException ();
+		}
+
+		void INavigation.RemovePage (Page page)
+		{
+			throw new NotImplementedException ();
+		}
 	}
 }

Ooui.Forms/Renderers/DefaultRenderer.cs

@@ -0,0 +1,12 @@
+using System;
+using Xamarin.Forms;
+
+namespace Ooui.Forms.Renderers
+{
+	public class DefaultRenderer : VisualElementRenderer<VisualElement>
+	{
+		public DefaultRenderer () : base ("div")
+		{
+		}
+	}
+}

Ooui.Forms/Renderers/ElementRenderer.cs

@@ -3,7 +3,40 @@ using Xamarin.Forms;
 
 namespace Ooui.Forms.Renderers
 {
-	public class ElementRenderer<TElement, TNativeElement> where TElement : View where TNativeElement : Ooui.Element
+	public class ElementRenderer<TElement, TNativeElement> : IVisualElementRenderer where TElement : View where TNativeElement : Ooui.Element
 	{
+
+		#region IDisposable Support
+		private bool disposedValue = false; // To detect redundant calls
+
+		protected virtual void Dispose (bool disposing)
+		{
+			if (!disposedValue) {
+				if (disposing) {
+					// TODO: dispose managed state (managed objects).
+				}
+
+				// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
+				// TODO: set large fields to null.
+
+				disposedValue = true;
+			}
+		}
+
+		// TODO: override a finalizer only if Dispose(bool disposing) above has code to free unmanaged resources.
+		// ~ElementRenderer() {
+		//   // Do not change this code. Put cleanup code in Dispose(bool disposing) above.
+		//   Dispose(false);
+		// }
+
+		// This code added to correctly implement the disposable pattern.
+		public void Dispose ()
+		{
+			// Do not change this code. Put cleanup code in Dispose(bool disposing) above.
+			Dispose (true);
+			// TODO: uncomment the following line if the finalizer is overridden above.
+			// GC.SuppressFinalize(this);
+		}
+		#endregion
 	}
 }

Ooui.Forms/ResourcesProvider.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using Xamarin.Forms.Internals;
+
+namespace Ooui.Forms
+{
+	public class ResourcesProvider : ISystemResourcesProvider
+	{
+		readonly Res res = new Res ();
+
+		public IResourceDictionary GetSystemResources ()
+		{
+			return res;
+		}
+
+		class Res : IResourceDictionary
+		{
+			readonly ConcurrentDictionary<string, object> values =
+				new ConcurrentDictionary<string, object> ();
+
+			public event EventHandler<ResourcesChangedEventArgs> ValuesChanged;
+
+			public bool TryGetValue (string key, out object value)
+			{
+				return values.TryGetValue (key, out value);
+			}
+
+			public IEnumerator<KeyValuePair<string, object>> GetEnumerator ()
+			{
+				return values.GetEnumerator ();
+			}
+
+			IEnumerator IEnumerable.GetEnumerator ()
+			{
+				return values.GetEnumerator ();
+			}
+		}
+	}
+}

Ooui.Forms/VisualElementRenderer.cs

@@ -0,0 +1,45 @@
+using System;
+using Xamarin.Forms;
+
+namespace Ooui.Forms
+{
+	public class VisualElementRenderer<TElement> : Element, IVisualElementRenderer where TElement : VisualElement
+	{
+		public VisualElementRenderer (string tagName) : base (tagName)
+		{
+		}
+
+		#region IDisposable Support
+		private bool disposedValue = false; // To detect redundant calls
+
+		protected virtual void Dispose (bool disposing)
+		{
+			if (!disposedValue) {
+				if (disposing) {
+					// TODO: dispose managed state (managed objects).
+				}
+
+				// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
+				// TODO: set large fields to null.
+
+				disposedValue = true;
+			}
+		}
+
+		// TODO: override a finalizer only if Dispose(bool disposing) above has code to free unmanaged resources.
+		// ~VisualElementRenderer() {
+		//   // Do not change this code. Put cleanup code in Dispose(bool disposing) above.
+		//   Dispose(false);
+		// }
+
+		// This code added to correctly implement the disposable pattern.
+		public void Dispose ()
+		{
+			// Do not change this code. Put cleanup code in Dispose(bool disposing) above.
+			Dispose (true);
+			// TODO: uncomment the following line if the finalizer is overridden above.
+			// GC.SuppressFinalize(this);
+		}
+		#endregion
+	}
+}

Ooui/UI.cs

@@ -402,6 +402,9 @@ namespace Ooui
             Element element = null;
             try {
                 element = elementHandler.GetElement ();
+
+				if (element == null)
+					throw new Exception ("Handler returned a null element");
             }
             catch (Exception ex) {
                 listenerContext.Response.StatusCode = 500;