Platform Specifics (#301)

* Playing around with how the platform specifics interfaces etc. might work

* Sample implementation of iOS navigation translucency

* Very slightly reduced code

* Better vendor stuff

* Drop single-implemenation interfaces

* Generics on NavigationPage

* On-demand vendor stuff

* Remove functionally duplicate classes and make ControlGallery work again

* Namespace all the things. XAML test.

* Can use Effect to attach platform specific

* Attach Effect on PropertyChanging for XAML support!

* Rename IConfigPlatform interfaces for readability

* Some renaming to match the documents

* Split class files

* Clear out test-only code

* Re-namespace

* Added On method to rendered Elements

* Allow for removal of platform suffix, convenience methods on specific platforms

* Creating a gallery page for specifics

* Add rudimentary Platform Specifics gallery; make CollapseStyle work on UWP;
Add CollapsedPaneWidth specific property

* Toolbar now working with both collapse styles

* MDP now displaying Content title; toolbar routing around title

* Add a gallery for the iOS NavigationPage stuff

* Add Navigation Page as detail page to verify it works with new Toolbar options

* Make titlebar/toolbar background colors consistent

* ToolbarPlacement now working on NavigationPage

* Toolbar Placement working for tabbed and nav pages

* Fix bug where phone doesn't get default toolbar placement on start

* [Core] Add PS WindowSoftInputModeAdjust

[Core] Make Application extendable

* Toolbar placement now working on Nav, Tabbed, and Master pages on desktop/phone

Remove unnecessary style indirection

Fix build errors

* [A] Add PlatformConfigurationExtensions

* SetSoftInputMode test page

* [A] SetSoftInputMode

Known issue: Status bar color does not work in AdjustResize mode

* [Core] Add PS Blur

* [iOS] Configure renderer for blur

* Add test page

* Move to blur VisualElement for broader support

* Move test pages to gallery

* Update docs

* Use lazy initializer for PlatformConfigurationRegistry

3 files changed, 42 insertions, 12 deletions

diff --git a/Xamarin.Forms.Platform.WinRT.Phone/FormsPivot.cs b/Xamarin.Forms.Platform.WinRT.Phone/FormsPivot.cs
index a2e765b3..b06acb1f 100644
--- a/Xamarin.Forms.Platform.WinRT.Phone/FormsPivot.cs
+++ b/Xamarin.Forms.Platform.WinRT.Phone/FormsPivot.cs
@@ -2,6 +2,7 @@
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Media;
+using Xamarin.Forms.PlatformConfiguration.WindowsSpecific;
 
 #if WINDOWS_UWP
 
@@ -12,7 +13,7 @@ namespace Xamarin.Forms.Platform.WinRT
 {
 	public class FormsPivot : Pivot, IToolbarProvider
 	{
-		public static readonly DependencyProperty ToolbarVisibilityProperty = DependencyProperty.Register(nameof(ToolbarVisibility), typeof(Visibility), typeof(FormsPivot),
+		public static readonly DependencyProperty TitleVisibilityProperty = DependencyProperty.Register(nameof(TitleVisibility), typeof(Visibility), typeof(FormsPivot),
 			new PropertyMetadata(Visibility.Collapsed));
 
 		public static readonly DependencyProperty ToolbarForegroundProperty = DependencyProperty.Register(nameof(ToolbarForeground), typeof(Brush), typeof(FormsPivot), new PropertyMetadata(default(Brush)));
@@ -20,10 +21,14 @@ namespace Xamarin.Forms.Platform.WinRT
 		public static readonly DependencyProperty ToolbarBackgroundProperty = DependencyProperty.Register(nameof(ToolbarBackground), typeof(Brush), typeof(FormsPivot), new PropertyMetadata(default(Brush)));
 
 		CommandBar _commandBar;
-
+#if WINDOWS_UWP
+		Border _bottomCommandBarArea;
+		Border _topCommandBarArea;
+#endif
 		TaskCompletionSource<CommandBar> _commandBarTcs;
+	    ToolbarPlacement _toolbarPlacement;
 
-		public Brush ToolbarBackground
+	    public Brush ToolbarBackground
 		{
 			get { return (Brush)GetValue(ToolbarBackgroundProperty); }
 			set { SetValue(ToolbarBackgroundProperty, value); }
@@ -35,12 +40,24 @@ namespace Xamarin.Forms.Platform.WinRT
 			set { SetValue(ToolbarForegroundProperty, value); }
 		}
 
-		public Visibility ToolbarVisibility
+		public Visibility TitleVisibility
 		{
-			get { return (Visibility)GetValue(ToolbarVisibilityProperty); }
-			set { SetValue(ToolbarVisibilityProperty, value); }
+			get { return (Visibility)GetValue(TitleVisibilityProperty); }
+			set { SetValue(TitleVisibilityProperty, value); }
 		}
 
+        public ToolbarPlacement ToolbarPlacement
+	    {
+	        get { return _toolbarPlacement; }
+	        set
+	        {
+	            _toolbarPlacement = value;
+#if WINDOWS_UWP
+	            UpdateToolbarPlacement();
+#endif
+	        }
+	    }
+
 		Task<CommandBar> IToolbarProvider.GetCommandBarAsync()
 		{
 			if (_commandBar != null)
@@ -54,12 +71,24 @@ namespace Xamarin.Forms.Platform.WinRT
 		protected override void OnApplyTemplate()
 		{
 			base.OnApplyTemplate();
+			
 			_commandBar = GetTemplateChild("CommandBar") as CommandBar;
+
+#if WINDOWS_UWP
+			_bottomCommandBarArea = GetTemplateChild("BottomCommandBarArea") as Border;
+			_topCommandBarArea = GetTemplateChild("TopCommandBarArea") as Border;
+			UpdateToolbarPlacement();
+#endif
+
 			TaskCompletionSource<CommandBar> tcs = _commandBarTcs;
-			if (tcs != null)
-			{
-				tcs.SetResult(_commandBar);
-			}
+		    tcs?.SetResult(_commandBar);
 		}
+
+#if WINDOWS_UWP
+		void UpdateToolbarPlacement()
+		{
+			ToolbarPlacementHelper.UpdateToolbarPlacement(_commandBar, ToolbarPlacement, _bottomCommandBarArea, _topCommandBarArea);
+		}
+#endif
 	}
 }
\ No newline at end of file
diff --git a/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml b/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml
index b693a226..41ec603d 100644
--- a/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml
+++ b/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml
@@ -436,7 +436,8 @@
 							<RowDefinition Height="*" />
 						</Grid.RowDefinitions>
 
-                        <Grid Height="79" Background="{TemplateBinding NavigationBarBackground}" Visibility="{Binding ShowNavigationBar,RelativeSource={RelativeSource Mode=TemplatedParent},Converter={StaticResource BoolVisibilityConverter}}">
+                        <Grid Height="79" Background="{TemplateBinding NavigationBarBackground}" 
+							  Visibility="{TemplateBinding TitleVisibility}">
                             <TextBlock Margin="10,0,0,0" Name="title" Foreground="{TemplateBinding TitleBrush}" VerticalAlignment="Center" Style="{ThemeResource HeaderTextBlockStyle}" Text="{Binding Title}" />
                         </Grid>
                    		<ContentPresenter x:Name="presenter" Grid.Row="1" ContentTransitions="{TemplateBinding ContentTransitions}" />
diff --git a/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs b/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs
index df4fba71..b6731ce9 100644
--- a/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs
+++ b/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs
@@ -187,7 +187,7 @@ namespace Xamarin.Forms.Platform.WinRT
 					return;
 				_showTitle = value;
 
-				Control.ToolbarVisibility = _showTitle ? Visibility.Visible : Visibility.Collapsed;
+				Control.TitleVisibility = _showTitle ? Visibility.Visible : Visibility.Collapsed;
 			}
 		}