DYN-5862 Python editor docking improvements (DynamoDS#13984)

* Python docking improvements

* Update resources

* update

* Update ScriptEditorWindow.xaml.cs

* update CachedEngine when editor engine is changed in docked state

* Improvement python editor behavior inside a custom node.

* Update DynamoViewModel.cs

* Addressing comments

* Update PythonNode.cs

src/DynamoCoreWpf/Properties/Resources.en-US.resx

@@ -2143,7 +2143,7 @@ Do you want to install the latest Dynamo update?</value>
     <value>Write note here</value>
   </data>
   <data name="SideBarPanelViewTitle" xml:space="preserve">
-    <value>SideBar Panel</value>
+    <value>Sidebar</value>
   </data>
   <data name="ExtensionAdded" xml:space="preserve">
     <value>Extension tab added to the extensions side bar.</value>

src/DynamoCoreWpf/Properties/Resources.resx

@@ -2367,7 +2367,7 @@ Want to publish a different package?</value>
     <value>Write note here</value>
   </data>
   <data name="SideBarPanelViewTitle" xml:space="preserve">
-    <value>SideBar Panel</value>
+    <value>Sidebar</value>
   </data>
   <data name="ExtensionAdded" xml:space="preserve">
     <value>Extension tab added to the extensions side bar.</value>

src/DynamoCoreWpf/UI/GuidedTour/GuidesValidationMethods.cs

@@ -577,14 +577,14 @@ internal static void ExecuteViewDetailsSideBar(Step stepInfo, StepUIAutomation u
                 if (packageDetailsWindow == null)
                     return;
                 //In order to close the Package Details tab we need first to get the Tab, then get the Close button and finally call the event to close it
-                TabItem tabitem = dynamoView.SideBarPanelTabItems.OfType<TabItem>().SingleOrDefault(n => n.Header.ToString() == packageDetailsName);
+                TabItem tabitem = stepInfo.DynamoViewModelStep.SideBarTabItems.OfType<TabItem>().SingleOrDefault(n => n.Header.ToString() == packageDetailsName);
                 if (tabitem == null)
                     return;
                 //Get the Close button from the PackageDetailsView
                 Button closeButton = GuideUtilities.FindChild(tabitem, closeButtonName) as Button;
                 if (closeButton == null)
                     return;
-                dynamoView.OnCloseRightSidePanelTab(closeButton, null);
+                dynamoView.OnCloseRightSideBarTab(closeButton, null);
             }
         }
 

src/DynamoCoreWpf/ViewModels/Core/DynamoViewModel.cs

@@ -9,6 +9,7 @@
 using System.Linq;
 using System.Reflection;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Forms;
 using System.Windows.Media;
 using System.Windows.Threading;
@@ -42,6 +43,8 @@
 using Dynamo.Wpf.ViewModels.FileTrust;
 using Dynamo.Wpf.ViewModels.Watch3D;
 using DynamoUtilities;
+using ICSharpCode.AvalonEdit;
+using PythonNodeModels;
 using ISelectable = Dynamo.Selection.ISelectable;
 using WpfResources = Dynamo.Wpf.Properties.Resources;
 
@@ -63,24 +66,40 @@ public partial class DynamoViewModel : ViewModelBase, IDynamoViewModel
 
         // Can the user run the graph
         private bool CanRunGraph => HomeSpace.RunSettings.RunEnabled && !HomeSpace.GraphRunInProgress;
-
         private ObservableCollection<DefaultWatch3DViewModel> watch3DViewModels = new ObservableCollection<DefaultWatch3DViewModel>();
+        private ObservableCollection<TabItem> sideBarTabItems = new ObservableCollection<TabItem>();
 
         /// <summary>
-        /// An observable collection of workspace view models which tracks the model
+        /// An observable collection of workspace view models which tracks the model.
         /// </summary>
         private ObservableCollection<WorkspaceViewModel> workspaces = new ObservableCollection<WorkspaceViewModel>();
 
         /// <summary>
-        /// Set of node window id's that are currently docked in right side sidebar
+        /// Set of node window id's that are currently docked in right side sidebar.
         /// </summary>
-        internal HashSet<string> CurrentDockedWindows { get; set; } = new HashSet<string>();
+        internal HashSet<string> DockedNodeWindows { get; set; } = new HashSet<string>();
 
         /// <summary>
         ///  Node window's state, either DockRight or FloatingWindow.
         /// </summary>
         internal Dictionary<string, ViewExtensionDisplayMode> NodeWindowsState { get; set; } = new Dictionary<string, ViewExtensionDisplayMode>();
 
+        /// <summary>
+        /// Collection of Right SideBar tab items: view extensions and docked windows.
+        /// </summary>
+        public ObservableCollection<TabItem> SideBarTabItems
+        {
+            get
+            {
+                return sideBarTabItems;
+            }
+            set
+            {
+                sideBarTabItems = value;
+                RaisePropertyChanged(nameof(SideBarTabItems));
+            }
+        }
+
         public ObservableCollection<WorkspaceViewModel> Workspaces
         {
             get { return workspaces; }
@@ -1470,6 +1489,57 @@ internal void AddToRecentFiles(string path)
             }
         }
 
+        // Get the nodemodel if a node is present in any open workspace.
+        internal NodeModel GetDockedWindowNodeModel(string tabId)
+        {
+            var workspaces = Model.Workspaces;
+            NodeModel nodeModel = null;
+
+            foreach (WorkspaceModel workspace in workspaces)
+            {
+                nodeModel = workspace.Nodes.FirstOrDefault(x => x.GUID.ToString() == tabId);
+                if (nodeModel != null)
+                {
+                    return nodeModel;
+                }
+            }
+            return nodeModel;
+        }
+
+        /// <summary>
+        /// Closes any docked python script windows if there are no unsaved changes.
+        /// Show warning message on the script editor if it has unsaved changes.
+        /// </summary>
+        /// <param name="nodes">Nodes in the workspace</param>
+        internal bool CanCloseDockedNodeWindows(ObservableCollection<NodeViewModel> nodes)
+        {
+            foreach (var node in nodes)
+            {
+                var id = node.NodeModel.GUID.ToString();
+                if (DockedNodeWindows.Contains(id))
+                {
+                    var tabItem = SideBarTabItems.OfType<TabItem>().SingleOrDefault(n => n.Uid.ToString() == id);
+                    NodeModel nodeModel = GetDockedWindowNodeModel(tabItem.Uid);
+
+                    if (nodeModel is PythonNode pythonNode)
+                    {
+                        var editor = (tabItem.Content as Grid).ChildOfType<TextEditor>();
+                        if (editor != null && editor.IsModified)
+                        {
+                            pythonNode.OnWarnUserScript();
+                            tabItem.Focus();
+                            return false;
+                        }
+                        pythonNode.Dispose();
+                    }
+
+                    SideBarTabItems.Remove(tabItem);
+                    DockedNodeWindows.Remove(id);
+                }
+            }
+            return true;
+        }
+
         /// <summary>
         /// Returns the file-save dialog with customized file types of Dynamo.
         /// </summary>

src/DynamoCoreWpf/ViewModels/Core/WorkspaceViewModel.cs

@@ -1329,8 +1329,14 @@ private void Hide(object parameters)
             }
             else
             {
-                if (!Model.HasUnsavedChanges || DynamoViewModel.AskUserToSaveWorkspaceOrCancel(Model))
-                    DynamoViewModel.Model.RemoveWorkspace(Model);
+                // Close the custom workspace only if all docked node windows are saved and can be closed.
+                if (DynamoViewModel.CanCloseDockedNodeWindows(Nodes))
+                {
+                    if (!Model.HasUnsavedChanges || DynamoViewModel.AskUserToSaveWorkspaceOrCancel(Model))
+                    {
+                        DynamoViewModel.Model.RemoveWorkspace(Model);
+                    }
+                }
             }
         }
 

src/DynamoCoreWpf/Views/Core/DynamoView.xaml

@@ -1556,7 +1556,7 @@
               Grid.Row="2"
               Grid.Column="4"
               Grid.RowSpan="2">
-            <TabControl Name="tabDynamic" Background="#353535" BorderThickness="0" ItemsSource="{Binding}">
+            <TabControl Name="tabDynamic" Background="#353535" BorderThickness="0" ItemsSource="{Binding SideBarTabItems, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}">
                 <TabControl.Resources>
                     <!--Styling for the close button in the tab-->
                     <Style TargetType="{x:Type Button}"
@@ -1594,11 +1594,11 @@
                             <TextBlock Text="{Binding RelativeSource={RelativeSource AncestorType={x:Type TabItem}}, Path=Header}"
                                        FontFamily="{StaticResource ArtifaktElementBold}"
                                        FontSize="12"
-                                       Margin="5,5,0,0"
+                                       Margin="5,7,0,0"
                                        HorizontalAlignment="Stretch"/>
 
                             <!--Button to close a particular tab-->
-                            <Button Name="CloseButton" Style="{StaticResource CloseButtonStyle}" DockPanel.Dock="Right" Click="OnCloseRightSidePanelTab"
+                            <Button Name="CloseButton" Style="{StaticResource CloseButtonStyle}" DockPanel.Dock="Right" Click="OnCloseRightSideBarTab"
                                     Margin="5,5,5,0" Uid="{Binding RelativeSource={RelativeSource AncestorType={x:Type TabItem}}, Path=Uid}">
                                 <Image Width="18" Height="18" HorizontalAlignment="Right" VerticalAlignment="Center">
                                     <Image.Style>
@@ -1618,7 +1618,7 @@
                                 </Image>
                             </Button>
                             <!-- Undock -->
-                            <Button Name="UndockButton" Style="{StaticResource CloseButtonStyle}" DockPanel.Dock="Right" Click="OnUndockRightSidePanelTab"
+                            <Button Name="UndockButton" Style="{StaticResource CloseButtonStyle}" DockPanel.Dock="Right" Click="OnUndockRightSideBarTab"
                                     Margin="8,5,0,0" Uid="{Binding RelativeSource={RelativeSource AncestorType={x:Type TabItem}}, Path=Uid}">
                                 <Image Width="18" Height="18" HorizontalAlignment="Right" VerticalAlignment="Center">
                                     <Image.Style>