1 files changed, 71 insertions, 0 deletions
diff --git a/src/Ryujinx/UI/Helpers/MiniCommand.cs b/src/Ryujinx/UI/Helpers/MiniCommand.cs
new file mode 100644
index 00000000..7e1bb9a6
--- /dev/null
+++ b/src/Ryujinx/UI/Helpers/MiniCommand.cs
@@ -0,0 +1,71 @@
+using System;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace Ryujinx.Ava.UI.Helpers
+{
+    public sealed class MiniCommand<T> : MiniCommand, ICommand
+    {
+        private readonly Action<T> _callback;
+        private bool _busy;
+        private readonly Func<T, Task> _asyncCallback;
+
+        public MiniCommand(Action<T> callback)
+        {
+            _callback = callback;
+        }
+
+        public MiniCommand(Func<T, Task> callback)
+        {
+            _asyncCallback = callback;
+        }
+
+        private bool Busy
+        {
+            get => _busy;
+            set
+            {
+                _busy = value;
+                CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+            }
+        }
+
+        public override event EventHandler CanExecuteChanged;
+        public override bool CanExecute(object parameter) => !_busy;
+
+        public override async void Execute(object parameter)
+        {
+            if (Busy)
+            {
+                return;
+            }
+            try
+            {
+                Busy = true;
+                if (_callback != null)
+                {
+                    _callback((T)parameter);
+                }
+                else
+                {
+                    await _asyncCallback((T)parameter);
+                }
+            }
+            finally
+            {
+                Busy = false;
+            }
+        }
+    }
+
+    public abstract class MiniCommand : ICommand
+    {
+        public static MiniCommand Create(Action callback) => new MiniCommand<object>(_ => callback());
+        public static MiniCommand Create<TArg>(Action<TArg> callback) => new MiniCommand<TArg>(callback);
+        public static MiniCommand CreateFromTask(Func<Task> callback) => new MiniCommand<object>(_ => callback());
+
+        public abstract bool CanExecute(object parameter);
+        public abstract void Execute(object parameter);
+        public abstract event EventHandler CanExecuteChanged;
+    }
+}