feat: implement locale switch.

demo/Semi.Avalonia.Demo/App.axaml

@@ -1,9 +1,10 @@
 <Application
     x:Class="Semi.Avalonia.Demo.App"
     xmlns="https://github.com/avaloniaui"
-    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:semi="https://irihi.tech/semi">
     <Application.Styles>
-        <StyleInclude Source="avares://Semi.Avalonia/Themes/Index.axaml" />
+        <semi:SemiTheme Locale="zh-CN"/>
         <StyleInclude Source="avares://Semi.Avalonia.DataGrid/Index.axaml" />
         <StyleInclude Source="avares://Semi.Avalonia.ColorPicker/Index.axaml" />
     </Application.Styles>

src/Semi.Avalonia/AssemblyInfo.cs

@@ -0,0 +1,4 @@
+using Avalonia.Metadata;
+
+[assembly:XmlnsPrefix("https://irihi.tech/semi", "semi")]
+[assembly:XmlnsDefinition("https://irihi.tech/semi", "Semi.Avalonia")]

src/Semi.Avalonia/Controls/ManagedFileChooser.axaml

@@ -80,11 +80,11 @@
                             <TextBox
                                 IsVisible="{Binding !SelectingFolder}"
                                 Text="{Binding FileName}"
-                                Watermark="File name" />
+                                Watermark="{DynamicResource STRING_CHOOSER_FILE_NAME}" />
                         </DockPanel>
                         <CheckBox
                             VerticalAlignment="Center"
-                            Content="Show hidden files"
+                            Content="{DynamicResource STRING_CHOOSER_SHOW_HIDDEN_FILES}"
                             DockPanel.Dock="Left"
                             IsChecked="{Binding ShowHiddenFiles}" />
                         <UniformGrid
@@ -94,15 +94,13 @@
                             <Button
                                 Margin="8,0,0,0"
                                 Classes="Primary"
-                                Command="{Binding Ok}">
+                                Command="{Binding Ok}"
-                                OK
+                                Content="{DynamicResource STRING_CHOOSER_DIALOG_OK}" />
-                            </Button>
                             <Button
                                 Margin="8,0,0,0"
                                 Classes="Danger"
-                                Command="{Binding Cancel}">
+                                Command="{Binding Cancel}"
-                                Cancel
+                                Content="{DynamicResource STRING_CHOOSER_DIALOG_CANCEL}" />
-                            </Button>
                         </UniformGrid>
                     </DockPanel>
                     <Border

src/Semi.Avalonia/Locale/en-us.axaml

@@ -0,0 +1,7 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <x:String x:Key="STRING_CHOOSER_FILE_NAME">File name</x:String>
+    <x:String x:Key="STRING_CHOOSER_SHOW_HIDDEN_FILES">Show hidden flies</x:String>
+    <x:String x:Key="STRING_CHOOSER_DIALOG_OK">OK</x:String>
+    <x:String x:Key="STRING_CHOOSER_DIALOG_CANCEL">Cancel</x:String>
+</ResourceDictionary>

src/Semi.Avalonia/Locale/zh-cn.axaml

@@ -0,0 +1,7 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <x:String x:Key="STRING_CHOOSER_FILE_NAME">文件名</x:String>
+    <x:String x:Key="STRING_CHOOSER_SHOW_HIDDEN_FILES">显示隐藏文件</x:String>
+    <x:String x:Key="STRING_CHOOSER_DIALOG_OK">确认</x:String>
+    <x:String x:Key="STRING_CHOOSER_DIALOG_CANCEL">取消</x:String>
+</ResourceDictionary>

src/Semi.Avalonia/Themes/Index.axaml

@@ -1,4 +1,4 @@
-<Styles 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">
     <Styles.Resources>
         <ResourceDictionary>
             <ResourceDictionary.ThemeDictionaries>
@@ -9,6 +9,7 @@
                 <ResourceInclude Source="avares://Semi.Avalonia/Controls/_index.axaml" />
                 <ResourceInclude Source="avares://Semi.Avalonia/Themes/Base.axaml" />
                 <ResourceInclude Source="avares://Semi.Avalonia/Themes/Shared/_index.axaml" />
+                <ResourceInclude Source="avares://Semi.Avalonia/Locale/zh-cn.axaml" />
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </Styles.Resources>

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

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using Avalonia.Styling;
+
+namespace Semi.Avalonia;
+
+public class SemiTheme: Styles
+{
+    private static readonly Dictionary<CultureInfo, string> _localeToResource = new()
+    {
+        { new CultureInfo("zh-CN"), "avares://Semi.Avalonia/Locale/zh-CN.axaml" },
+        { new CultureInfo("en-US"), "avares://Semi.Avalonia/Locale/en-US.axaml" },
+    };
+    
+    private readonly IServiceProvider? sp;
+    public SemiTheme(IServiceProvider? provider = null)
+    {
+        sp = provider;
+        AvaloniaXamlLoader.Load(provider, this);
+    }
+
+    private CultureInfo? _locale;
+    public CultureInfo? Locale
+    {
+        get => _locale;
+        set
+        { 
+            _locale = value;
+            var resource = TryGetLocaleResource(value);
+            var d = AvaloniaXamlLoader.Load(sp, new Uri(resource)) as ResourceDictionary;
+            if (d is null) return;
+            foreach (var kv in d)
+            {
+                this.Resources.Add(kv);
+            }
+        }
+    }
+    
+    private static string TryGetLocaleResource(CultureInfo? locale)
+    {
+        if (locale is null)
+        {
+            return _localeToResource[new CultureInfo("zh-CN")];
+        }
+
+        if (_localeToResource.TryGetValue(locale, out var resource))
+        {
+            return resource;
+        }
+        return _localeToResource[new CultureInfo("zh-CN")];
+    }
+}