Prep Cell & friends for removal of InternalsVisibleTo (#142)

* Prep Cell & friends for removal of InternalsVisibleTo

Includes:
- Cell
- EntryCell
- ListView
- MenuItem
- TableView
- ViewCell
- Toolbar

Moved extensions to Internal & removed TPH

* Update docs

* [Controls] Ignore Issue2411 on iOS <9

* [Controls] Formatting for Issue2411

4 files changed, 35 insertions, 7 deletions

diff --git a/Xamarin.Forms.Core/Cells/Cell.cs b/Xamarin.Forms.Core/Cells/Cell.cs
index 3b16d06a..863e0342 100644
--- a/Xamarin.Forms.Core/Cells/Cell.cs
+++ b/Xamarin.Forms.Core/Cells/Cell.cs
@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 
 namespace Xamarin.Forms
 {
-	public abstract class Cell : Element
+	public abstract class Cell : Element, ICellController
 	{
 		public static readonly BindableProperty IsEnabledProperty = BindableProperty.Create("IsEnabled", typeof(bool), typeof(Cell), true, propertyChanged: OnIsEnabledPropertyChanged);
 
@@ -78,6 +78,13 @@ namespace Xamarin.Forms
 
 		public event EventHandler Disappearing;
 
+		event EventHandler ForceUpdateSizeRequested;
+		event EventHandler ICellController.ForceUpdateSizeRequested
+		{
+			add { ForceUpdateSizeRequested += value; }
+			remove { ForceUpdateSizeRequested -= value; }
+		}
+
 		public void ForceUpdateSize()
 		{
 			if (_nextCallToForceUpdateSizeQueued)
@@ -148,9 +155,7 @@ namespace Xamarin.Forms
 			base.OnPropertyChanging(propertyName);
 		}
 
-		internal event EventHandler ForceUpdateSizeRequested;
-
-		internal void SendAppearing()
+		void ICellController.SendAppearing()
 		{
 			OnAppearing();
 
@@ -159,7 +164,7 @@ namespace Xamarin.Forms
 				container.SendCellAppearing(this);
 		}
 
-		internal void SendDisappearing()
+		void ICellController.SendDisappearing()
 		{
 			OnDisappearing();
 
diff --git a/Xamarin.Forms.Core/Cells/EntryCell.cs b/Xamarin.Forms.Core/Cells/EntryCell.cs
index cccdcae1..b61f685f 100644
--- a/Xamarin.Forms.Core/Cells/EntryCell.cs
+++ b/Xamarin.Forms.Core/Cells/EntryCell.cs
@@ -2,7 +2,7 @@ using System;
 
 namespace Xamarin.Forms
 {
-	public class EntryCell : Cell
+	public class EntryCell : Cell, IEntryCellController
 	{
 		public static readonly BindableProperty TextProperty = BindableProperty.Create("Text", typeof(string), typeof(EntryCell), null, BindingMode.TwoWay);
 
@@ -64,7 +64,7 @@ namespace Xamarin.Forms
 
 		public event EventHandler Completed;
 
-		internal void SendCompleted()
+		void IEntryCellController.SendCompleted()
 		{
 			EventHandler handler = Completed;
 			if (handler != null)
diff --git a/Xamarin.Forms.Core/Cells/ICellController.cs b/Xamarin.Forms.Core/Cells/ICellController.cs
new file mode 100644
index 00000000..ab5d08c2
--- /dev/null
+++ b/Xamarin.Forms.Core/Cells/ICellController.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Xamarin.Forms
+{
+	public interface ICellController
+	{
+		event EventHandler ForceUpdateSizeRequested;
+
+		void SendAppearing();
+		void SendDisappearing();
+	}
+}
diff --git a/Xamarin.Forms.Core/Cells/IEntryCellController.cs b/Xamarin.Forms.Core/Cells/IEntryCellController.cs
new file mode 100644
index 00000000..b3722d67
--- /dev/null
+++ b/Xamarin.Forms.Core/Cells/IEntryCellController.cs
@@ -0,0 +1,8 @@
+
+namespace Xamarin.Forms
+{
+	public interface IEntryCellController
+	{
+		void SendCompleted();
+	}
+}