MacOS (#650)

* [MacOS] Add SwitchRenderer

* [MacOS] Add TimePickerRenderer

* [MacOS] Cleanup TimePcikerRender

* [MacOS] Add WebViewRenderer

* [MacOS] Add Javascript evaluate to webview

* [MacOS] Fix build error on WebViewRenderer

* [MacOS] Add Base and TextCell renderers

* [MacOS] Start on ListViewRenderer

* [MacOS] Cleanup

* [MacOS] Vertical center text on default NSTextField

* [MacOS] Center NSTextField vertically

* [MacOS] Add ImageCellRenderer

* [MacOS] Add SwitchCellRenderer

* [MacOS] Add SwitchCellRenderer

* [iOS] Allow to set background color on other CellRenderers

* [MacOS] Fix selection mode on ListView

* [MacOS] Set background on Entry of entry cell

* [MacOS] Fix casting bug on CellRenderer

* [MacOS] Other fix on CellRenderer background

* [MacOS] Add ViewCellRenderer

* [MacOS] Fixes and cleanup on cells

* [MacOS] Add NSScrollView so NSTableView can scroll

* [MacOS] Add HeaderView to ListView

* [MacOS] Cleanup

* [Controls] Add Header support to ListView

* [MacOS] NSView reuse on NSTableView

* [MacOS] Some fix on layour order

* [MacOS] Add CarouselPageRenderer

* [MacOS] Implement EventTracker on PageRenderer

* [MacOS] Cleanup CarouselPageRenderer

* [MacOS] Add MasterDetailPage renderer

* [MacOS] MDP renderer don't allow drag of splitter

* [MacOS] Add TabbedPage renderer

* [MacOS] Initial sketch of NavigationPageRenderer

* [MacOS] Send disappearing of CurrentPage on Dispose on NavigationPageRenderer

* [MacOS] Add Gallery page for Mac

* [MacOS] Add MacOSExpressionSearch

* [MacOS] Fix ColorExtension

* [MacOS] Fix MDP renderer layout

* [MacOS] Implement native selection on ListViewRenderer

* [MacOS] Deselect a item on NSTableView

* [MacOS] Remove previous SplitViewItems

* [MacOS] Fix navigationpage height

* [MacOS] Add toolbar for NavigationPageRenderer

* [MacOS] Don't remove selection for now (crashing)

* [MacOS] Refactor page and back button title on NavigationPageRenderer

* [MacOS] Fix bug when native navigate back

* [MacOS] Hide layer when transition

* [MacOS] ListviewRenderer fix BbackgroundColor

* [MacOS] Fix background on ScrollViewRenderer

* [MacOS] Fix header measure on ListViewRenderer

* [MacOS] Add Mac twitter demo

* [Controls] Spaces for easy reading

* [MacOS] More xaml cleanup

* [Core] Add Mac as aTargetPlatform

* [MacOS] Add alerts and actionsheets

* [MacOS] Add GestureRecognizers

* [MacOS] Fix Layout issues when adding children, enable transformations

* [MacOS] Fix title on tab item, move to tabbed navigation based on segmented control

* [MacOS] Hide toolbar when not needed, this allows to work with tabbed page, cleanup

* [MacOS] Add NativeBindings and NativeViewWrapper

* [MacOS] Fix AssemblyInfo

* [MacOS] FIX NRE on SetBackgroundColor BoxView

* [MacOS] Fix NavigationPageRenderer

* [MacOS] Fix build

* [MacOS] Also update page when it resizes

* [MacOS] Add LayoutRenderer for handle items position when the bounds change.

* [MacOS] Refactor/Cleanup

* [MacOS] Add toolbar items support to NavigationPage

* [MacOS] Resize images for TabViewITems

* [MacOS] Fix TabbedPage resize issues , allow users to override some features when creating TVI

* [MacOS] Fix hide/show Navigation toolbar

* [MacOS] Redo CarouselPageRenderer with NSPageController

* [MacOS] Add support for Modal pages

* [MacOS] Refactor navigation from platform

* [Nuget] Add nuget for MacOS

* [Nuget]Fix nuspec

* [Nuget] Add variables for CI

* [Controls] Remove MainMenu from MacOS

* [MacOS] Add TableView renderer (no headers yet)

* [MacOS] Refactoring, marking extensions as internal

* [MacOS] Add group headers for TableViewRenderer

* [MacOS] Workaround for updates on listview collection

* [MacOS] Handle updates of rows in the ListViewRenderer properly

* [MacOS] Fix navigation animation

* Fix navigation header issues with modal pages

* [MacOS] Fix MDP issues with resizing

* [MacOS] Fix general dispose

* [MacOS] Add a ViewControllerWrapper for NSSplitView

* [MacOS] MDP renderer fix animation

* [MacOS] Fix ListView selection bug

* [MacOS] Fix rendering MDP Layout inside wrappers

* [MacOS] Re write the MainToolbar handler

* [MacOS] Don't use Sierra new extensions so we can run in stable channel

* [MacOS] Another way to hide the toolbar (smarter i think)

* [MacOS] Fix MDP bug and remove debug color

* [Controls] Add HanselForms sample

* [MacOS] Fix NRE WebviewRenderer

* [MacOS] Fix uneven rows on ListView renderer

* [MacOS] Fix NRE on load (can+t find the reason this happens)

* [MacOS] Fix uneven rows

* [MacOS] Fix header sizing on ListViewRenderer

* [Controls] More stuff on HanselForms

* [MacOS] Remove warning from ListViewRenderer

* [MacOS] Fix PageRenderer bug double init

* [MacOS] Don't calculate height if RowHeight is provided

* [Controls] More Hanselforms stuff

* [MacOS] Once again a new implementation for the NavigationBar, this time using a custom view to support BackgroundColor

* [MacOS] Fix build

* [MacOS] Refactoring AwesomeBar related controls

* Fix build

* [MacOS] NavigationBar update background and t test colors

* [MacOS] Fix when we remove navigation so it works when the NavigationRenderer wasn't removed from the parent controller like in a TabbedPage

* [MacOS] Add support for ListView  grouping

* [MacOS] Fix image extension method.

* [MacOS] Add base Maps project

* [MacOS] Export MapRenderer

* [MacOS] Add pin click and geocoderbacked for Maps

* [MacOS] Add extra binding project for API not in stable.

* [MacOS] Add MacOS Maps lib

* [MacOS]Fix build on alpha

* [MacOS] Remove MacOS Maps extra binding

* [UITest] Basic macOS setup

* [UITest] Add MacOSApp wrapper implementation

* [MacOS] Set AutomationID

* [UITests] Add ActionSheetUITests to MacOS UITest

* [MacOS] Fix bug on Picker

* [UITests] Link basic uitest basefixture and related files

* [MacOS] Fix pickers reuse

* [UItests] Fix MacOS app path

* [UITest] Ignore UItest for appearing on macOS for now

* [UITest] Update macOS for 2.0.3

* [UITest] Refactor EnterText MacOS app

* [UITest]Fix ViewQuery on MacOS

* [UITest]Fix IsEnabled UItest on macOS

* [UITest] Implement Enter, mark some tests inconclusive fix others

* [MacOS] Implement Entry Completed event

* [UITests] Fix UITest for IsVisible, ignore ToolbarItem test for now

* [UITests] Fix ISVisible again add extra category

* [Controls] Cleanup macOS gallery

* [MacOS] Fix Assembly info

* [Docs] Fix docs

* Fix build

* [Nuget] Fix nuspec

* [Controls] Link files on MacOS

* [Core] Update Forms stack before firing a event saying page was removed, possible breaking change

* [MacOS] Implement RemovePage on NavigationPAgeRenderer

* [UItest] Ignore some , implement back on MacOS UITest app

* [MacOS] Add default back button name (needs to be translated)

* [MacOS] Fix dispose

* [UITest] Make 29257 work on MacOS

* [MacOS] Rename stuff

* [MacOS] More renaming and cleanup

* [MacOS] Share implementations for iOS

* [MacOS] Reuse more IOS extensions

* [MacOS] Reuse FontExtensions

* [MacOS] Share NativeViewWrapper related stuff

* [MAcOS] Share event args and ExportRenderer

* [MacOS] Share platform effect

* [MacOS] Fix build

* [Docs]Fixing docs

* [MacOS] Fix ViewCell reuse

* [Core] Support ListView CachingStrategy on MacOS

* [MacOS] Fix issues with TextCell and ImageCell (we can’t set null to a NSControl value)

* [MacOS] Fix MDP child sizing bug
[UITest] Query marked by id and text

* [MacOS] Comment test related with context actions

* [MacOS] Implement missing stuff on ticker

* [MacOS] Make sure VisualElemenTracker calls the ticker update

* [UITests]Ignore context actions and not possible to test

* [MacOS] Fix Grouping bug on Listview

* [MacOS] Fix selection on Listview when using grouping

* [MacOS] Update navbar when page is popped

* [MacOS] Cleanup NavigationBar

* [Controls] More info on exceptions

* [MacOS] Fix bug animation pop modal

* [MacOS] Bring back BackgroundColor of NavigationBar

* [MacOS] Fix UITest animation delay

* [MacOS] Treat warnings as errors

* [MacOS] Center title on toolbar

* [Core] Add Platform configuration specific for MacOS

* [MacOS] Implement TabbedPage platform specific to handle TabItems on NavigationPage bar

* [MacOS] Fix warning

* [MacOS] Fix bug on SearchBar color

* [MacOS]Fix build

* [MacOS] remove extra dll from maps

* [Docs] Update docs

* [MacOS]Cleanup and refactoring

* Revert "[MacOS] remove extra dll from maps"

This reverts commit 73b948937001fea3f28449a963d0b94943e07aa0.

* [MacOS] Fix wrong refactoring

* [MacOS] Remove gallery and uitest project

* [MacOS] dix formatting

* [MacOS] Remove extra stuff

* Merge branch 'master' into macOS-gallery

* [MacOS] Fix rebase

* [MacOS] Fix TargetPlatform

* fix docs

* [MacOS] Fix bug on TabbedPageRenderer no title

* [MacOS] Remove FormsNSView

* [MacOS] Cleanup on dispose on MDP renderer

* [MacOS] Update current page when source changes

* [MacOS] More cleanup

* [MacOS] Make sure we show the previous page when popping a Modal

* [MacOS] Fix issue with sizing the Header and visibility, remove for now header renderer reuse

* [MacOS] Clean CustomNSTableView

* [MacOS] Share LabelRenderer with iOS

* [MacOS] Share ResourcesProvider with iOS

* [MAcoS] Share VisualElementPackager with iOS

* [MacOS] Share ViewRenderer with iOS

* [MacOS] Merge with VisualElementTracker from iOS

* [MacOS] Merge with EventTracker from iOS

* [MacOS] Merge with VisualElementRenderer of iOS

* [MacOS] Make sure we always have a layer

* [MacOS] Fix Tracker merge with iOS version

* [MacOS] Fix bug with tabbed page on modal without navigation

* [Core] Rever change on core

* [MacOS] Clear renderers before setting them MDP

* [MacOS] Update tabbedPage ContainerArea

* [MacOS] Fix ListViewRenderer

* [MacOS] Make sure we don’t pass null to TextField string value

* [MacOS] Support for multiple clicks in same selected item on NSTableView

* [MacOS] Support Focus on EntryRenderer

* [MacOS] Fix index bug on TablevIewDataSource

* [MacOS] Fix SelectedItem TableViewDataSource

* [Nuget] Add Mac to Maps nuspec

* [Nuget]Fix path

* [macOS] Fixed Tab NSImage crash in TabbedPageRenderer (#705)

* [macOS] Fixed Tab NSImage crash in TabbedPageRenderer

* Coding Style

* Coding Style

* [MacOS] Fix previous merge with master

* [MacOS] Possible simple fix for click on views overlapping

* [MacOS] Rename to IsOnViewCell

* [MacOS] Cleanup, Address feedback from Samantha’s review

1 files changed, 355 insertions, 0 deletions

diff --git a/Xamarin.Forms.Platform.MacOS/Renderers/NavigationPageRenderer.cs b/Xamarin.Forms.Platform.MacOS/Renderers/NavigationPageRenderer.cs
new file mode 100644
index 00000000..23d7f856
--- /dev/null
+++ b/Xamarin.Forms.Platform.MacOS/Renderers/NavigationPageRenderer.cs
@@ -0,0 +1,355 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Threading.Tasks;
+using AppKit;
+using CoreAnimation;
+using Foundation;
+using Xamarin.Forms.Internals;
+
+namespace Xamarin.Forms.Platform.MacOS
+{
+	public class NavigationPageRenderer : NSViewController, IVisualElementRenderer, IEffectControlProvider
+	{
+		bool _disposed;
+		bool _appeared;
+		EventTracker _events;
+		VisualElementTracker _tracker;
+		Stack<NavigationChildPageWrapper> _currentStack = new Stack<NavigationChildPageWrapper>();
+
+		IPageController PageController => Element as IPageController;
+
+		IElementController ElementController => Element as IElementController;
+
+		INavigationPageController NavigationController => Element as INavigationPageController;
+
+		void IEffectControlProvider.RegisterEffect(Effect effect)
+		{
+			var platformEffect = effect as PlatformEffect;
+			if (platformEffect != null)
+				platformEffect.Container = View;
+		}
+
+		public NavigationPageRenderer() : this(IntPtr.Zero)
+		{
+		}
+
+		public NavigationPageRenderer(IntPtr handle)
+		{
+			View = new NSView { WantsLayer = true };
+		}
+
+		public VisualElement Element { get; private set; }
+
+		public event EventHandler<VisualElementChangedEventArgs> ElementChanged;
+
+		public SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
+		{
+			return NativeView.GetSizeRequest(widthConstraint, heightConstraint);
+		}
+
+		public NSViewController ViewController => this;
+
+		public NSView NativeView => View;
+
+		public void SetElement(VisualElement element)
+		{
+			var oldElement = Element;
+			Element = element;
+
+			Init();
+
+			OnElementChanged(new VisualElementChangedEventArgs(oldElement, element));
+
+			EffectUtilities.RegisterEffectControlProvider(this, oldElement, element);
+		}
+
+		public void SetElementSize(Size size)
+		{
+			Element.Layout(new Rectangle(Element.X, Element.Y, size.Width, size.Height));
+		}
+
+		public Task<bool> PopToRootAsync(Page page, bool animated = true)
+		{
+			return OnPopToRoot(page, animated);
+		}
+
+		public Task<bool> PopViewAsync(Page page, bool animated = true)
+		{
+			return OnPop(page, animated);
+		}
+
+		public Task<bool> PushPageAsync(Page page, bool animated = true)
+		{
+			return OnPush(page, animated);
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			if (!_disposed && disposing)
+			{
+				if (Element != null)
+				{
+					PageController?.SendDisappearing();
+					((Element as IPageContainer<Page>)?.CurrentPage as IPageController)?.SendDisappearing();
+					Element.PropertyChanged -= HandlePropertyChanged;
+					Element = null;
+				}
+
+				_tracker?.Dispose();
+				_tracker = null;
+
+				_events?.Dispose();
+				_events = null;
+
+				_disposed = true;
+			}
+			base.Dispose(disposing);
+		}
+
+		public override void ViewDidDisappear()
+		{
+			base.ViewDidDisappear();
+			if (!_appeared)
+				return;
+			Platform.NativeToolbarTracker.TryHide(Element as NavigationPage);
+			_appeared = false;
+			PageController?.SendDisappearing();
+		}
+
+		public override void ViewDidAppear()
+		{
+			base.ViewDidAppear();
+			Platform.NativeToolbarTracker.Navigation = (NavigationPage)Element;
+			if (_appeared)
+				return;
+
+			_appeared = true;
+			PageController?.SendAppearing();
+		}
+
+		protected virtual void OnElementChanged(VisualElementChangedEventArgs e)
+		{
+			if (e.OldElement != null)
+				e.OldElement.PropertyChanged -= HandlePropertyChanged;
+
+			if (e.NewElement != null)
+				e.NewElement.PropertyChanged += HandlePropertyChanged;
+
+			ElementChanged?.Invoke(this, e);
+		}
+
+		protected virtual void ConfigurePageRenderer()
+		{
+			View.WantsLayer = true;
+		}
+
+		protected virtual Task<bool> OnPopToRoot(Page page, bool animated)
+		{
+			var renderer = Platform.GetRenderer(page);
+			if (renderer == null || renderer.ViewController == null)
+				return Task.FromResult(false);
+
+			Platform.NativeToolbarTracker.UpdateToolBar();
+			return Task.FromResult(true);
+		}
+
+		protected virtual async Task<bool> OnPop(Page page, bool animated)
+		{
+			var removed = await PopPageAsync(page, animated);
+			Platform.NativeToolbarTracker.UpdateToolBar();
+			return removed;
+		}
+
+		protected virtual async Task<bool> OnPush(Page page, bool animated)
+		{
+			var shown = await AddPage(page, animated);
+			Platform.NativeToolbarTracker.UpdateToolBar();
+			return shown;
+		}
+
+		void Init()
+		{
+			ConfigurePageRenderer();
+
+			var navPage = (NavigationPage)Element;
+
+			if (navPage.CurrentPage == null)
+				throw new InvalidOperationException(
+					"NavigationPage must have a root Page before being used. Either call PushAsync with a valid Page, or pass a Page to the constructor before usage.");
+
+			Platform.NativeToolbarTracker.Navigation = navPage;
+
+			NavigationController.PushRequested += OnPushRequested;
+			NavigationController.PopRequested += OnPopRequested;
+			NavigationController.PopToRootRequested += OnPopToRootRequested;
+			NavigationController.RemovePageRequested += OnRemovedPageRequested;
+			NavigationController.InsertPageBeforeRequested += OnInsertPageBeforeRequested;
+
+			navPage.Popped += (sender, e) => Platform.NativeToolbarTracker.UpdateToolBar();
+			navPage.PoppedToRoot += (sender, e) => Platform.NativeToolbarTracker.UpdateToolBar();
+
+			UpdateBarBackgroundColor();
+			UpdateBarTextColor();
+
+			_events = new EventTracker(this);
+			_events.LoadEvents(NativeView);
+			_tracker = new VisualElementTracker(this);
+
+			((INavigationPageController)navPage).Pages.ForEach(async p => await PushPageAsync(p, false));
+
+			UpdateBackgroundColor();
+		}
+
+		IVisualElementRenderer CreateViewControllerForPage(Page page)
+		{
+			if (Platform.GetRenderer(page) == null)
+				Platform.SetRenderer(page, Platform.CreateRenderer(page));
+
+			var pageRenderer = Platform.GetRenderer(page);
+			return pageRenderer;
+		}
+
+		//TODO: Implement InserPageBefore
+		void InsertPageBefore(Page page, Page before)
+		{
+			if (before == null)
+				throw new ArgumentNullException(nameof(before));
+			if (page == null)
+				throw new ArgumentNullException(nameof(page));
+		}
+
+		void OnInsertPageBeforeRequested(object sender, NavigationRequestedEventArgs e)
+		{
+			InsertPageBefore(e.Page, e.BeforePage);
+		}
+
+		void OnPopRequested(object sender, NavigationRequestedEventArgs e)
+		{
+			e.Task = PopViewAsync(e.Page, e.Animated);
+		}
+
+		void OnPopToRootRequested(object sender, NavigationRequestedEventArgs e)
+		{
+			e.Task = PopToRootAsync(e.Page, e.Animated);
+		}
+
+		void OnPushRequested(object sender, NavigationRequestedEventArgs e)
+		{
+			e.Task = PushPageAsync(e.Page, e.Animated);
+		}
+
+		void OnRemovedPageRequested(object sender, NavigationRequestedEventArgs e)
+		{
+			RemovePage(e.Page, true);
+			Platform.NativeToolbarTracker.UpdateToolBar();
+		}
+
+		void RemovePage(Page page, bool removeFromStack)
+		{
+			(page as IPageController)?.SendDisappearing();
+			var target = Platform.GetRenderer(page);
+			target?.NativeView?.RemoveFromSuperview();
+			target?.ViewController?.RemoveFromParentViewController();
+			target?.Dispose();
+			if (removeFromStack)
+			{
+				var newStack = new Stack<NavigationChildPageWrapper>();
+				foreach (var stack in _currentStack)
+				{
+					if (stack.Page != page)
+					{
+						newStack.Push(stack);
+					}
+				}
+				_currentStack = newStack;
+			}
+		}
+
+		async Task<bool> PopPageAsync(Page page, bool animated)
+		{
+			if (page == null)
+				throw new ArgumentNullException(nameof(page));
+
+			var wrapper = _currentStack.Peek();
+			if (page != wrapper.Page)
+				throw new NotSupportedException("Popped page does not appear on top of current navigation stack, please file a bug.");
+
+			_currentStack.Pop();
+			(page as IPageController)?.SendDisappearing();
+
+			var target = Platform.GetRenderer(page);
+			var previousPage = _currentStack.Peek().Page;
+
+			if (animated)
+			{
+				var previousPageRenderer = Platform.GetRenderer(previousPage);
+				return await this.HandleAsyncAnimation(target.ViewController, previousPageRenderer.ViewController,
+					NSViewControllerTransitionOptions.SlideBackward, () => Platform.DisposeRendererAndChildren(target), true);
+			}
+
+			RemovePage(page, false);
+			return true;
+		}
+
+		async Task<bool> AddPage(Page page, bool animated)
+		{
+			if (page == null)
+				throw new ArgumentNullException(nameof(page));
+
+			Page oldPage = null;
+			if (_currentStack.Count >= 1)
+				oldPage = _currentStack.Peek().Page;
+
+			_currentStack.Push(new NavigationChildPageWrapper(page));
+
+			var vc = CreateViewControllerForPage(page);
+			vc.SetElementSize(new Size(View.Bounds.Width, View.Bounds.Height));
+			page.Layout(new Rectangle(0, 0, View.Bounds.Width, View.Frame.Height));
+
+			if (_currentStack.Count == 1 || !animated)
+			{
+				vc.NativeView.WantsLayer = true;
+				AddChildViewController(vc.ViewController);
+				View.AddSubview(vc.NativeView);
+				return true;
+			}
+			var vco = Platform.GetRenderer(oldPage);
+			AddChildViewController(vc.ViewController);
+			return await this.HandleAsyncAnimation(vco.ViewController, vc.ViewController,
+				NSViewControllerTransitionOptions.SlideForward, () => (page as IPageController)?.SendAppearing(), true);
+		}
+
+		void UpdateBackgroundColor()
+		{
+			if (View.Layer == null)
+				return;
+			var color = Element.BackgroundColor == Color.Default ? Color.White : Element.BackgroundColor;
+			View.Layer.BackgroundColor = color.ToCGColor();
+		}
+
+		void UpdateBarBackgroundColor()
+		{
+			Platform.NativeToolbarTracker.UpdateToolBar();
+		}
+
+		void UpdateBarTextColor()
+		{
+			Platform.NativeToolbarTracker.UpdateToolBar();
+		}
+
+		void HandlePropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			if (_tracker == null)
+				return;
+
+			if (e.PropertyName == NavigationPage.BarBackgroundColorProperty.PropertyName)
+				UpdateBarBackgroundColor();
+			else if (e.PropertyName == NavigationPage.BarTextColorProperty.PropertyName)
+				UpdateBarTextColor();
+			else if (e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName)
+				UpdateBackgroundColor();
+		}
+	}
+}
\ No newline at end of file