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, 299 insertions, 0 deletions

diff --git a/Xamarin.Forms.Platform.MacOS/Renderers/ListViewDataSource.cs b/Xamarin.Forms.Platform.MacOS/Renderers/ListViewDataSource.cs
new file mode 100644
index 00000000..6742053c
--- /dev/null
+++ b/Xamarin.Forms.Platform.MacOS/Renderers/ListViewDataSource.cs
@@ -0,0 +1,299 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using AppKit;
+using Foundation;
+
+namespace Xamarin.Forms.Platform.MacOS
+{
+	internal class ListViewDataSource : NSTableViewSource
+	{
+		IVisualElementRenderer _prototype;
+		const int DefaultItemTemplateId = 1;
+		static int s_dataTemplateIncrementer = 2; // lets start at not 0 because
+		static int s_sectionCount;
+		readonly nfloat _defaultSectionHeight;
+		readonly Dictionary<DataTemplate, int> _templateToId = new Dictionary<DataTemplate, int>();
+		readonly NSTableView _nsTableView;
+		protected readonly ListView List;
+
+		IListViewController Controller => List;
+
+		ITemplatedItemsView<Cell> TemplatedItemsView => List;
+
+		bool _selectionFromNative;
+
+		public virtual bool IsGroupingEnabled => List.IsGroupingEnabled;
+
+		public Dictionary<int, int> Counts { get; set; }
+
+		public ListViewDataSource(ListViewDataSource source)
+		{
+			List = source.List;
+			_nsTableView = source._nsTableView;
+			_defaultSectionHeight = source._defaultSectionHeight;
+			_selectionFromNative = source._selectionFromNative;
+			Counts = new Dictionary<int, int>();
+		}
+
+		public ListViewDataSource(ListView list, NSTableView tableView)
+		{
+			List = list;
+			List.ItemSelected += OnItemSelected;
+			_nsTableView = tableView;
+			Counts = new Dictionary<int, int>();
+		}
+
+		public void Update()
+		{
+			_nsTableView.ReloadData();
+		}
+
+		public void OnRowClicked()
+		{
+			var selectedRow = _nsTableView.SelectedRow;
+			if (selectedRow == -1)
+				return;
+
+			Cell cell = null;
+			NSIndexPath indexPath = GetPathFromRow(selectedRow, ref cell);
+
+			if (cell == null)
+				return;
+
+			_selectionFromNative = true;
+			Controller.NotifyRowTapped((int)indexPath.Section, (int)indexPath.Item, cell);
+		}
+
+
+		public void OnItemSelected(object sender, SelectedItemChangedEventArgs eventArg)
+		{
+			if (_selectionFromNative)
+			{
+				_selectionFromNative = false;
+				return;
+			}
+
+			var location = TemplatedItemsView.TemplatedItems.GetGroupAndIndexOfItem(eventArg.SelectedItem);
+			if (location.Item1 == -1 || location.Item2 == -1)
+			{
+				var row = _nsTableView.SelectedRow;
+				int groupIndex = 1;
+				var selectedIndexPath = NSIndexPath.FromItemSection(row, groupIndex);
+				if (selectedIndexPath != null)
+					_nsTableView.DeselectRow(selectedIndexPath.Item);
+				return;
+			}
+
+			var rowId = location.Item2;
+
+			_nsTableView.SelectRow(rowId, false);
+		}
+
+		public override bool IsGroupRow(NSTableView tableView, nint row)
+		{
+			if (!IsGroupingEnabled)
+				return false;
+
+			int sectionIndex;
+			bool isGroupHeader;
+			int itemIndexInSection;
+
+			GetComputedIndexes(row, out sectionIndex, out itemIndexInSection, out isGroupHeader);
+			return isGroupHeader;
+		}
+
+		public override bool ShouldSelectRow(NSTableView tableView, nint row)
+		{
+			return !IsGroupRow(tableView, row);
+		}
+
+		public override nfloat GetRowHeight(NSTableView tableView, nint row)
+		{
+			if (!List.HasUnevenRows)
+				return List.RowHeight == -1 ? ListViewRenderer.DefaultRowHeight : List.RowHeight;
+
+			Cell cell = null;
+			GetPathFromRow(row, ref cell);
+
+			return CalculateHeightForCell(tableView, cell);
+		}
+
+		public override nint GetRowCount(NSTableView tableView)
+		{
+			var templatedItems = TemplatedItemsView.TemplatedItems;
+			nint count = 0;
+
+			if (!IsGroupingEnabled)
+			{
+				count = templatedItems.Count;
+			}
+			else
+			{
+				var sections = templatedItems.Count;
+				for (int i = 0; i < sections; i++)
+				{
+					var group = (IList)((IList)templatedItems)[i];
+					count += group.Count + 1;
+				}
+				s_sectionCount = sections;
+			}
+			return count;
+		}
+
+		public override NSView GetViewForItem(NSTableView tableView, NSTableColumn tableColumn, nint row)
+		{
+			var sectionIndex = 0;
+			var itemIndexInSection = (int)row;
+			Cell cell;
+
+			var isHeader = false;
+
+			if (IsGroupingEnabled)
+				GetComputedIndexes(row, out sectionIndex, out itemIndexInSection, out isHeader);
+
+			var indexPath = NSIndexPath.FromItemSection(itemIndexInSection, sectionIndex);
+			var templateId = isHeader ? "headerCell" : TemplateIdForPath(indexPath).ToString();
+
+			NSView nativeCell;
+
+			var cachingStrategy = Controller.CachingStrategy;
+			if (cachingStrategy == ListViewCachingStrategy.RetainElement)
+			{
+				cell = GetCellForPath(indexPath, isHeader);
+				nativeCell = CellNSView.GetNativeCell(tableView, cell, templateId, isHeader);
+			}
+			else if (cachingStrategy == ListViewCachingStrategy.RecycleElement)
+			{
+				nativeCell = tableView.MakeView(templateId, tableView);
+				if (nativeCell == null)
+				{
+					cell = GetCellForPath(indexPath, isHeader);
+					nativeCell = CellNSView.GetNativeCell(tableView, cell, templateId, isHeader, true);
+				}
+				else
+				{
+					var templatedList = TemplatedItemsView.TemplatedItems.GetGroup(sectionIndex);
+					cell = (Cell)((INativeElementView)nativeCell).Element;
+					ICellController controller = cell;
+					controller.SendDisappearing();
+					templatedList.UpdateContent(cell, itemIndexInSection);
+					controller.SendAppearing();
+				}
+			}
+			else
+				throw new NotSupportedException();
+			return nativeCell;
+		}
+
+		protected virtual Cell GetCellForPath(NSIndexPath indexPath, bool isGroupHeader)
+		{
+			var templatedItems = TemplatedItemsView.TemplatedItems;
+			if (IsGroupingEnabled)
+				templatedItems = (TemplatedItemsList<ItemsView<Cell>, Cell>)((IList)templatedItems)[(int)indexPath.Section];
+
+			var cell = isGroupHeader ? templatedItems.HeaderContent : templatedItems[(int)indexPath.Item];
+			return cell;
+		}
+
+		int TemplateIdForPath(NSIndexPath indexPath)
+		{
+			var itemTemplate = List.ItemTemplate;
+			var selector = itemTemplate as DataTemplateSelector;
+			if (selector == null)
+				return DefaultItemTemplateId;
+
+			var templatedList = TemplatedItemsView.TemplatedItems;
+			if (List.IsGroupingEnabled)
+				templatedList = (TemplatedItemsList<ItemsView<Cell>, Cell>)((IList)templatedList)[(int)indexPath.Section];
+
+			var item = templatedList.ListProxy[(int)indexPath.Item];
+
+			itemTemplate = selector.SelectTemplate(item, List);
+			int key;
+			if (!_templateToId.TryGetValue(itemTemplate, out key))
+			{
+				s_dataTemplateIncrementer++;
+				key = s_dataTemplateIncrementer;
+				_templateToId[itemTemplate] = key;
+			}
+			return key;
+		}
+
+		NSIndexPath GetPathFromRow(nint row, ref Cell cell)
+		{
+			var sectionIndex = 0;
+			bool isGroupHeader = false;
+			int itemIndexInSection;
+			if (IsGroupingEnabled)
+				GetComputedIndexes(row, out sectionIndex, out itemIndexInSection, out isGroupHeader);
+			else
+				itemIndexInSection = (int)row;
+			NSIndexPath indexPath = NSIndexPath.FromItemSection(itemIndexInSection, sectionIndex);
+			cell = GetCellForPath(indexPath, isGroupHeader);
+			return indexPath;
+		}
+
+		nfloat CalculateHeightForCell(NSTableView tableView, Cell cell)
+		{
+			var viewCell = cell as ViewCell;
+			double renderHeight;
+			if (List.RowHeight == -1 && viewCell?.View != null)
+			{
+				var target = viewCell.View;
+				if (_prototype == null)
+				{
+					_prototype = Platform.CreateRenderer(target);
+					Platform.SetRenderer(target, _prototype);
+				}
+				else
+				{
+					_prototype.SetElement(target);
+					Platform.SetRenderer(target, _prototype);
+				}
+
+				var req = target.Measure(tableView.Frame.Width, double.PositiveInfinity, MeasureFlags.IncludeMargins);
+
+				target.ClearValue(Platform.RendererProperty);
+				foreach (var descendant in target.Descendants())
+					descendant.ClearValue(Platform.RendererProperty);
+
+				renderHeight = req.Request.Height;
+			}
+			else
+			{
+				renderHeight = cell.RenderHeight;
+			}
+
+			return renderHeight > 0 ? (nfloat)renderHeight : ListViewRenderer.DefaultRowHeight;
+		}
+
+		void GetComputedIndexes(nint row, out int sectionIndex, out int itemIndexInSection, out bool isHeader)
+		{
+			var templatedItems = TemplatedItemsView.TemplatedItems;
+			var totalItems = 0;
+			isHeader = false;
+			sectionIndex = 0;
+			itemIndexInSection = 0;
+
+			for (int i = 0; i < s_sectionCount; i++)
+			{
+				var group = (IList)((IList)templatedItems)[i];
+				var itemsInSection = group.Count + 1;
+
+				if (row < totalItems + itemsInSection)
+				{
+					sectionIndex = i;
+					itemIndexInSection = (int)row - totalItems;
+					isHeader = itemIndexInSection == 0;
+					if (isHeader)
+						itemIndexInSection = -1;
+					else
+						itemIndexInSection = itemIndexInSection - 1;
+					break;
+				}
+				totalItems += itemsInSection;
+			}
+		}
+	}
+}
\ No newline at end of file