feat: initialize aquatic theme.

demo/Semi.Avalonia.Demo/App.axaml

@@ -2,6 +2,7 @@
     x:Class="Semi.Avalonia.Demo.App"
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    RequestedThemeVariant="{x:Static semi:SemiTheme.Aquatic}"
     xmlns:semi="https://irihi.tech/semi">
     <Application.Styles>
         <!-- You can still reference in old way.  -->

src/Semi.Avalonia/Themes/Aquatic/Aquatic.axaml

@@ -0,0 +1,107 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!--  Add Resources Here  -->
+    <Color x:Key="Background">#202020</Color>
+    <Color x:Key="Foreground">#FFFFFF</Color>
+    <Color x:Key="HotlightBrush">#75E9FC</Color>
+    <Color x:Key="InactiveForeground">#A6A6A6</Color>
+    <Color x:Key="SelectedForeground">#263B50</Color>
+    <Color x:Key="SelectedBackground">#8EE3F0</Color>
+    <Color x:Key="ButtonBackground">#202020</Color>
+    <Color x:Key="ButtonForeground">#FFFFFF</Color>
+    
+    <!--AdornerLayer-->
+    <SolidColorBrush x:Key="AdornerLayerStroke" Color="{StaticResource Foreground}" />
+    <!--AutoCompleteBox-->
+    <SolidColorBrush x:Key="AutoCompleteBoxPopupBackground" Color="{StaticResource Background}" />
+    <SolidColorBrush x:Key="AutoCompleteBoxPopupBorderBrush" Color="{StaticResource Foreground}" />
+    <!--Border-->
+    <SolidColorBrush x:Key="BorderCardBackground" Color="{StaticResource Background}" />
+    <SolidColorBrush x:Key="BorderCardBorderBrush" Color="{StaticResource Foreground}" />
+    <!--Button-->
+    <!--  Light  -->
+    <SolidColorBrush x:Key="ButtonDefaultPrimaryForeground" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonDefaultSecondaryForeground" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonDefaultTertiaryForeground" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonDefaultSuccessForeground" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonDefaultWarningForeground" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonDefaultDangerForeground" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonDefaultDisabledForeground" Color="{StaticResource InactiveForeground}" />
+
+    <SolidColorBrush x:Key="ButtonDefaultBackground" Color="{StaticResource ButtonBackground}" />
+    <SolidColorBrush x:Key="ButtonDefaultPointeroverBackground" Color="{StaticResource ButtonBackground}" />
+    <SolidColorBrush x:Key="ButtonDefaultPressedBackground" Color="{StaticResource ButtonBackground}" />
+
+    <SolidColorBrush x:Key="ButtonDefaultBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonDefaultPointeroverBorderBrush" Color="{StaticResource HotlightBrush}" />
+    <SolidColorBrush x:Key="ButtonDefaultPressedBorderBrush" Color="{StaticResource HotlightBrush}" />
+    <SolidColorBrush x:Key="ButtonDefaultDisabledBorderBrush" Color="{StaticResource InactiveForeground}" />
+    <!--  end Light  -->
+
+    <!--  Solid  -->
+    <SolidColorBrush x:Key="ButtonSolidForeground" Color="{StaticResource SelectedForeground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidPrimaryBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidPrimaryPointeroverBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidPrimaryPressedBackground" Color="{StaticResource SelectedBackground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidSecondaryBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidSecondaryPointeroverBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidSecondaryPressedBackground" Color="{StaticResource SelectedBackground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidTertiaryBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidTertiaryPointeroverBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidTertiaryPressedBackground" Color="{StaticResource SelectedBackground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidSuccessBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidSuccessPointeroverBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidSuccessPressedBackground" Color="{StaticResource SelectedBackground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidWarningBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidWarningPointeroverBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidWarningPressedBackground" Color="{StaticResource SelectedBackground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidDangerBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidDangerPointeroverBackground" Color="{StaticResource SelectedBackground}" />
+    <SolidColorBrush x:Key="ButtonSolidDangerPressedBackground" Color="{StaticResource SelectedBackground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidPrimaryBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidPrimaryPointeroverBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidPrimaryPressedBorderBrush" Color="{StaticResource ButtonForeground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidSecondaryBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidSecondaryPointeroverBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidSecondaryPressedBorderBrush" Color="{StaticResource ButtonForeground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidTertiaryBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidTertiaryPointeroverBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidTertiaryPressedBorderBrush" Color="{StaticResource ButtonForeground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidSuccessBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidSuccessPointeroverBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidSuccessPressedBorderBrush" Color="{StaticResource ButtonForeground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidWarningBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidWarningPointeroverBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidWarningPressedBorderBrush" Color="{StaticResource ButtonForeground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidDangerBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidDangerPointeroverBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonSolidDangerPressedBorderBrush" Color="{StaticResource ButtonForeground}" />
+
+    <SolidColorBrush x:Key="ButtonSolidDisabledBackground" Color="{StaticResource ButtonBackground}" />
+    <!--  end Solid  -->
+
+    <!--  Outline -->
+    <SolidColorBrush x:Key="ButtonOutlineBackground" Color="{StaticResource ButtonBackground}" />
+    <SolidColorBrush x:Key="ButtonOutlineBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonOutlinePointeroverBackground" Color="{StaticResource HotlightBrush}" />
+    <SolidColorBrush x:Key="ButtonOutlinePressedBackground" Color="{StaticResource HotlightBrush}" />
+    <SolidColorBrush x:Key="ButtonOutlineSuccessBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonOutlineWarningBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonOutlineDangerBorderBrush" Color="{StaticResource ButtonForeground}" />
+    <!--  end Outline  -->
+
+    <SolidColorBrush x:Key="ButtonInputInnerForeground" Color="{StaticResource ButtonForeground}" />
+    <SolidColorBrush x:Key="ButtonInputInnerPointeroverForeground" Color="{StaticResource HotlightBrush}" />
+    <SolidColorBrush x:Key="ButtonInputInnerPressedForeground" Color="{StaticResource HotlightBrush}" />
+</ResourceDictionary>

src/Semi.Avalonia/Themes/SemiTheme.axaml

@@ -1,9 +1,11 @@
-<Styles x:Class="Semi.Avalonia.SemiTheme" xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+<Styles x:Class="Semi.Avalonia.SemiTheme" xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:semi="https://irihi.tech/semi">
     <Styles.Resources>
         <ResourceDictionary>
             <ResourceDictionary.ThemeDictionaries>
                 <ResourceInclude x:Key="Default" Source="avares://Semi.Avalonia/Themes/Light/_index.axaml" />
                 <ResourceInclude x:Key="Dark" Source="avares://Semi.Avalonia/Themes/Dark/_index.axaml" />
+                <ResourceInclude x:Key="{x:Static semi:SemiTheme.Aquatic}" Source="avares://Semi.Avalonia/Themes/Aquatic/Aquatic.axaml" />
             </ResourceDictionary.ThemeDictionaries>
             <ResourceDictionary.MergedDictionaries>
                 <ResourceInclude Source="avares://Semi.Avalonia/Controls/_index.axaml" />

src/Semi.Avalonia/Themes/SemiTheme.axaml.cs

@@ -10,6 +10,8 @@ namespace Semi.Avalonia;
 
 public class SemiTheme : Styles
 {
+    public static ThemeVariant Aquatic => new ThemeVariant(nameof(Aquatic), ThemeVariant.Dark);
+    
     private static readonly Dictionary<CultureInfo, ResourceDictionary> _localeToResource = new()
     {
         { new CultureInfo("zh-cn"), new zh_cn() },