feat: initialize.

src/Ursa.Themes.Semi/Controls/Avatar.axaml

@@ -0,0 +1,7 @@
+<ResourceDictionary
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:u="https://irihi.tech/ursa">
+    <ControlTheme x:Key="{x:Type u:Avatar}" TargetType="{x:Type u:Avatar}" />
+    <ControlTheme x:Key="{x:Type u:AvatarGroup}" TargetType="{x:Type u:AvatarGroup}" />
+</ResourceDictionary>

src/Ursa.Themes.Semi/Controls/_index.axaml

@@ -1,6 +1,7 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <!--  Add Resources Here  -->
     <ResourceDictionary.MergedDictionaries>
+        <ResourceInclude Source="Avatar.axaml" />
         <ResourceInclude Source="Badge.axaml" />
         <ResourceInclude Source="Banner.axaml" />
         <ResourceInclude Source="ButtonGroup.axaml" />

src/Ursa.Themes.Semi/Themes/Dark/Avatar.axaml

@@ -0,0 +1,2 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+</ResourceDictionary>

src/Ursa.Themes.Semi/Themes/Dark/_index.axaml

@@ -1,6 +1,7 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <!--  Add Resources Here  -->
     <ResourceDictionary.MergedDictionaries>
+        <MergeResourceInclude Source="Avatar.axaml" />
         <MergeResourceInclude Source="Badge.axaml" />
         <MergeResourceInclude Source="Banner.axaml" />
         <MergeResourceInclude Source="ButtonGroup.axaml" />

src/Ursa.Themes.Semi/Themes/Light/Avatar.axaml

@@ -0,0 +1,2 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+</ResourceDictionary>

src/Ursa.Themes.Semi/Themes/Light/_index.axaml

@@ -1,6 +1,7 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <!--  Add Resources Here  -->
     <ResourceDictionary.MergedDictionaries>
+        <MergeResourceInclude Source="Avatar.axaml" />
         <MergeResourceInclude Source="Badge.axaml" />
         <MergeResourceInclude Source="Banner.axaml" />
         <MergeResourceInclude Source="ButtonGroup.axaml" />

src/Ursa.Themes.Semi/Themes/Shared/Avatar.axaml

@@ -0,0 +1,2 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+</ResourceDictionary>

src/Ursa.Themes.Semi/Themes/Shared/_index.axaml

@@ -1,6 +1,7 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <!--  Add Resources Here  -->
     <ResourceDictionary.MergedDictionaries>
+        <MergeResourceInclude Source="Avatar.axaml" />
         <MergeResourceInclude Source="Badge.axaml" />
         <MergeResourceInclude Source="Banner.axaml" />
         <MergeResourceInclude Source="ButtonGroup.axaml" />

src/Ursa/Controls/Avatar/Avatar.cs

@@ -0,0 +1,38 @@
+using Avalonia;
+using Avalonia.Controls;
+
+namespace Ursa.Controls;
+
+public class Avatar : Button
+{
+    public const string PART_TopPresenter = "PART_TopPresenter";
+    public const string PART_BottomPresenter = "PART_BottomPresenter";
+    public const string PART_HoverMask = "PART_HoverMask";
+
+    public static readonly StyledProperty<bool> ContentMotionProperty = AvaloniaProperty.Register<Avatar, bool>(
+        nameof(ContentMotion));
+
+    public static readonly StyledProperty<double> GapProperty = AvaloniaProperty.Register<Avatar, double>(
+        nameof(Gap));
+
+    public static readonly StyledProperty<string> SourceProperty = AvaloniaProperty.Register<Avatar, string>(
+        nameof(Source));
+
+    public bool ContentMotion
+    {
+        get => GetValue(ContentMotionProperty);
+        set => SetValue(ContentMotionProperty, value);
+    }
+
+    public double Gap
+    {
+        get => GetValue(GapProperty);
+        set => SetValue(GapProperty, value);
+    }
+
+    public string Source
+    {
+        get => GetValue(SourceProperty);
+        set => SetValue(SourceProperty, value);
+    }
+}

src/Ursa/Controls/Avatar/AvatarGroup.cs

@@ -0,0 +1,33 @@
+using Avalonia;
+using Avalonia.Controls;
+
+namespace Ursa.Controls;
+
+public class AvatarGroup : ItemsControl
+{
+    public const string PART_RenderMore = "PART_RenderMore";
+
+    public static readonly StyledProperty<int> MaxCountProperty = AvaloniaProperty.Register<AvatarGroup, int>(
+        nameof(MaxCount));
+
+    public static readonly StyledProperty<OverlapFromType> OverlapFromProperty = AvaloniaProperty.Register<AvatarGroup, OverlapFromType>(
+        nameof(OverlapFrom));
+
+    public int MaxCount
+    {
+        get => GetValue(MaxCountProperty);
+        set => SetValue(MaxCountProperty, value);
+    }
+
+    public OverlapFromType OverlapFrom
+    {
+        get => GetValue(OverlapFromProperty);
+        set => SetValue(OverlapFromProperty, value);
+    }
+}
+
+public enum OverlapFromType
+{
+    Start,
+    End
+}