1 files changed, 126 insertions, 0 deletions
diff --git a/Ryujinx.Ava/App.axaml.cs b/Ryujinx.Ava/App.axaml.cs
new file mode 100644
index 00000000..a76de8b3
--- /dev/null
+++ b/Ryujinx.Ava/App.axaml.cs
@@ -0,0 +1,126 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+using Avalonia.Styling;
+using Avalonia.Threading;
+using FluentAvalonia.Styling;
+using Ryujinx.Ava.Ui.Windows;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.Ui.Common.Configuration;
+using System;
+using System.IO;
+
+namespace Ryujinx.Ava
+{
+    public class App : Avalonia.Application
+    {
+        public override void Initialize()
+        {
+            AvaloniaXamlLoader.Load(this);
+        }
+
+        public override void OnFrameworkInitializationCompleted()
+        {
+            if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+            {
+                desktop.MainWindow = new MainWindow();
+            }
+
+            base.OnFrameworkInitializationCompleted();
+
+            if (Program.PreviewerDetached)
+            {
+                ApplyConfiguredTheme();
+
+                ConfigurationState.Instance.Ui.BaseStyle.Event += ThemeChanged_Event;
+                ConfigurationState.Instance.Ui.CustomThemePath.Event += ThemeChanged_Event;
+                ConfigurationState.Instance.Ui.EnableCustomTheme.Event += CustomThemeChanged_Event;
+            }
+        }
+
+        private void CustomThemeChanged_Event(object sender, ReactiveEventArgs<bool> e)
+        {
+            ApplyConfiguredTheme();
+        }
+
+        private void ShowRestartDialog()
+        {
+            // TODO. Implement Restart Dialog when SettingsWindow is implemented.
+        }
+
+        private void ThemeChanged_Event(object sender, ReactiveEventArgs<string> e)
+        {
+            ApplyConfiguredTheme();
+        }
+
+        private void ApplyConfiguredTheme()
+        {
+            try
+            {
+                string baseStyle = ConfigurationState.Instance.Ui.BaseStyle;
+                string themePath = ConfigurationState.Instance.Ui.CustomThemePath;
+                bool enableCustomTheme = ConfigurationState.Instance.Ui.EnableCustomTheme;
+
+                const string BaseStyleUrl = "avares://Ryujinx.Ava/Assets/Styles/Base{0}.xaml";
+
+                if (string.IsNullOrWhiteSpace(baseStyle))
+                {
+                    ConfigurationState.Instance.Ui.BaseStyle.Value = "Dark";
+
+                    baseStyle = ConfigurationState.Instance.Ui.BaseStyle;
+                }
+
+                var theme = AvaloniaLocator.Current.GetService<FluentAvaloniaTheme>();
+
+                theme.RequestedTheme = baseStyle;
+
+                var currentStyles = this.Styles;
+
+                // Remove all styles except the base style.
+                if (currentStyles.Count > 1)
+                {
+                    currentStyles.RemoveRange(1, currentStyles.Count - 1);
+                }
+
+                IStyle newStyles = null;
+
+                // Load requested style, and fallback to Dark theme if loading failed.
+                try
+                {
+                    newStyles = (Styles)AvaloniaXamlLoader.Load(new Uri(string.Format(BaseStyleUrl, baseStyle), UriKind.Absolute));
+                }
+                catch (XamlLoadException)
+                {
+                    newStyles = (Styles)AvaloniaXamlLoader.Load(new Uri(string.Format(BaseStyleUrl, "Dark"), UriKind.Absolute));
+                }
+
+                currentStyles.Add(newStyles);
+
+                if (enableCustomTheme)
+                {
+                    if (!string.IsNullOrWhiteSpace(themePath))
+                    {
+                        try
+                        {
+                            var themeContent = File.ReadAllText(themePath);
+                            var customStyle = AvaloniaRuntimeXamlLoader.Parse<IStyle>(themeContent);
+
+                            currentStyles.Add(customStyle);
+                        }
+                        catch (Exception ex)
+                        {
+                            Logger.Error?.Print(LogClass.Application, $"Failed to Apply Custom Theme. Error: {ex.Message}");
+                        }
+                    }
+                }
+            }
+            catch (Exception)
+            {
+                Logger.Warning?.Print(LogClass.Application, "Failed to Apply Theme. A restart is needed to apply the selected theme");
+
+                ShowRestartDialog();
+            }
+        }
+    }
+}
+\ No newline at end of file