feat: use common separator.

src/Ursa/Common/Constants.cs

@@ -0,0 +1,6 @@
+namespace Ursa.Common;
+
+internal static class Constants
+{
+    public static readonly char[] SpaceSeparator = [' '];
+}

src/Ursa/Controls/Dialog/Dialog.cs

@@ -1,6 +1,7 @@
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.ApplicationLifetimes;
+using Ursa.Common;
 
 namespace Ursa.Controls;
 
@@ -216,7 +217,7 @@ public static class Dialog
         }
         if (!string.IsNullOrWhiteSpace(options.StyleClass))
         {
-            var styles = options.StyleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = options.StyleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             window.Classes.AddRange(styles);
         }
     }
@@ -247,7 +248,7 @@ public static class Dialog
         }
         if (!string.IsNullOrWhiteSpace(options.StyleClass))
         {
-            var styles = options.StyleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = options.StyleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             window.Classes.AddRange(styles);
         }
     }

src/Ursa/Controls/Dialog/OverlayDialog.cs

@@ -2,6 +2,7 @@
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Layout;
+using Ursa.Common;
 
 namespace Ursa.Controls;
 
@@ -207,7 +208,7 @@ public static class OverlayDialog
         control.CanResize = options.CanResize;
         if (!string.IsNullOrWhiteSpace(options.StyleClass))
         {
-            var styles = options.StyleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = options.StyleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             control.Classes.AddRange(styles);
         }
         DialogControlBase.SetCanDragMove(control, options.CanDragMove);
@@ -238,7 +239,7 @@ public static class OverlayDialog
         control.CanResize = options.CanResize;
         if (!string.IsNullOrWhiteSpace(options.StyleClass))
         {
-            var styles = options.StyleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = options.StyleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             control.Classes.AddRange(styles);
         }
         DialogControlBase.SetCanDragMove(control, options.CanDragMove);

src/Ursa/Controls/Drawer/Drawer.cs

@@ -3,6 +3,7 @@ using Avalonia.Controls;
 using Avalonia.Input;
 using Ursa.Common;
 using Ursa.Controls.Options;
+// ReSharper disable RedundantExplicitArrayCreation
 
 namespace Ursa.Controls;
 
@@ -220,7 +221,7 @@ public static class Drawer
 
         if (!string.IsNullOrWhiteSpace(options.StyleClass))
         {
-            var styles = options.StyleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = options.StyleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             drawer.Classes.AddRange(styles);
         }
     }
@@ -247,7 +248,7 @@ public static class Drawer
         }
         if (!string.IsNullOrWhiteSpace(options.StyleClass))
         {
-            var styles = options.StyleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = options.StyleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             drawer.Classes.AddRange(styles);
         }
     }

src/Ursa/Controls/MessageBox/MessageBox.cs

@@ -2,6 +2,7 @@ using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Input;
+using Ursa.Common;
 
 namespace Ursa.Controls;
 
@@ -22,7 +23,7 @@ public static class MessageBox
         };
         if (!string.IsNullOrWhiteSpace(styleClass))
         {
-            var styles = styleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = styleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             messageWindow.Classes.AddRange(styles);
         }
         var lifetime = Application.Current?.ApplicationLifetime;
@@ -54,7 +55,7 @@ public static class MessageBox
         };
         if (!string.IsNullOrWhiteSpace(styleClass))
         {
-            var styles = styleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = styleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             messageWindow.Classes.AddRange(styles!);
         }
         var result = await messageWindow.ShowDialog<MessageBoxResult>(owner);
@@ -82,7 +83,7 @@ public static class MessageBox
         };
         if (!string.IsNullOrWhiteSpace(styleClass))
         {
-            var styles = styleClass!.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+            var styles = styleClass!.Split(Constants.SpaceSeparator, StringSplitOptions.RemoveEmptyEntries);
             messageControl.Classes.AddRange(styles!);
         }
         host.AddModalDialog(messageControl);