From db7cbaa61d3d86f8f01a04fd82fbf68bb61afd44 Mon Sep 17 00:00:00 2001
From: Dong Bin <14807942+rabbitism@users.noreply.github.com>
Date: Mon, 25 Sep 2023 06:47:19 +0800
Subject: [PATCH] feat: WindowNotificationManager: support TopCenter and
 BottomCenter position (#12804)

* feat: support topcenter and bottom center.

* fix: fix typo.
---
 .../Notifications/NotificationPosition.cs             |  4 +++-
 .../Notifications/WindowNotificationManager.cs        |  4 +++-
 .../Controls/WindowNotificationManager.xaml           | 11 +++++++++++
 .../Controls/WindowNotificationManager.xaml           | 11 +++++++++++
 4 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Controls/Notifications/NotificationPosition.cs b/src/Avalonia.Controls/Notifications/NotificationPosition.cs
index 79f22f7972..f853ed6fe6 100644
--- a/src/Avalonia.Controls/Notifications/NotificationPosition.cs
+++ b/src/Avalonia.Controls/Notifications/NotificationPosition.cs
@@ -9,6 +9,8 @@
         TopLeft,
         TopRight,
         BottomLeft,
-        BottomRight
+        BottomRight,
+        TopCenter,
+        BottomCenter,
     }
 }
diff --git a/src/Avalonia.Controls/Notifications/WindowNotificationManager.cs b/src/Avalonia.Controls/Notifications/WindowNotificationManager.cs
index 6d9a030ead..20ebd94a76 100644
--- a/src/Avalonia.Controls/Notifications/WindowNotificationManager.cs
+++ b/src/Avalonia.Controls/Notifications/WindowNotificationManager.cs
@@ -15,7 +15,7 @@ namespace Avalonia.Controls.Notifications
     /// An <see cref="INotificationManager"/> that displays notifications in a <see cref="Window"/>.
     /// </summary>
     [TemplatePart("PART_Items", typeof(Panel))]
-    [PseudoClasses(":topleft", ":topright", ":bottomleft", ":bottomright")]
+    [PseudoClasses(":topleft", ":topright", ":bottomleft", ":bottomright", ":topcenter", ":bottomcenter")]
     public class WindowNotificationManager : TemplatedControl, IManagedNotificationManager
     {
         private IList? _items;
@@ -215,6 +215,8 @@ namespace Avalonia.Controls.Notifications
             PseudoClasses.Set(":topright", position == NotificationPosition.TopRight);
             PseudoClasses.Set(":bottomleft", position == NotificationPosition.BottomLeft);
             PseudoClasses.Set(":bottomright", position == NotificationPosition.BottomRight);
+            PseudoClasses.Set(":topcenter", position == NotificationPosition.TopCenter);
+            PseudoClasses.Set(":bottomcenter", position == NotificationPosition.BottomCenter);
         }
     }
 }
diff --git a/src/Avalonia.Themes.Fluent/Controls/WindowNotificationManager.xaml b/src/Avalonia.Themes.Fluent/Controls/WindowNotificationManager.xaml
index a62f4adfd6..cbdd01bd6f 100644
--- a/src/Avalonia.Themes.Fluent/Controls/WindowNotificationManager.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/WindowNotificationManager.xaml
@@ -42,6 +42,11 @@
       <Setter Property="HorizontalAlignment" Value="Right" />
     </Style>
 
+    <Style Selector="^:topcenter /template/ ReversibleStackPanel#PART_Items">
+      <Setter Property="VerticalAlignment" Value="Top" />
+      <Setter Property="HorizontalAlignment" Value="Center" />
+    </Style>
+
     <Style Selector="^:bottomleft /template/ ReversibleStackPanel#PART_Items">
       <Setter Property="ReverseOrder" Value="True" />
       <Setter Property="VerticalAlignment" Value="Bottom" />
@@ -53,5 +58,11 @@
       <Setter Property="VerticalAlignment" Value="Bottom" />
       <Setter Property="HorizontalAlignment" Value="Right" />
     </Style>
+
+    <Style Selector="^:bottomcenter /template/ ReversibleStackPanel#PART_Items">
+      <Setter Property="ReverseOrder" Value="True" />
+      <Setter Property="VerticalAlignment" Value="Bottom" />
+      <Setter Property="HorizontalAlignment" Value="Center" />
+    </Style>
   </ControlTheme>
 </ResourceDictionary>
diff --git a/src/Avalonia.Themes.Simple/Controls/WindowNotificationManager.xaml b/src/Avalonia.Themes.Simple/Controls/WindowNotificationManager.xaml
index ede24fd6eb..e13848b9fa 100644
--- a/src/Avalonia.Themes.Simple/Controls/WindowNotificationManager.xaml
+++ b/src/Avalonia.Themes.Simple/Controls/WindowNotificationManager.xaml
@@ -38,6 +38,11 @@
       <Setter Property="HorizontalAlignment" Value="Right" />
     </Style>
 
+    <Style Selector="^:topcenter /template/ ReversibleStackPanel#PART_Items">
+      <Setter Property="VerticalAlignment" Value="Top" />
+      <Setter Property="HorizontalAlignment" Value="Center" />
+    </Style>
+
     <Style Selector="^:bottomleft /template/ ReversibleStackPanel#PART_Items">
       <Setter Property="ReverseOrder" Value="True" />
       <Setter Property="VerticalAlignment" Value="Bottom" />
@@ -49,5 +54,11 @@
       <Setter Property="VerticalAlignment" Value="Bottom" />
       <Setter Property="HorizontalAlignment" Value="Right" />
     </Style>
+
+    <Style Selector="^:bottomcenter /template/ ReversibleStackPanel#PART_Items">
+      <Setter Property="ReverseOrder" Value="True" />
+      <Setter Property="VerticalAlignment" Value="Bottom" />
+      <Setter Property="HorizontalAlignment" Value="Center" />
+    </Style>
   </ControlTheme>
 </ResourceDictionary>