maui-linux/Handlers/RelayCommand.cs

using System;
using System.Windows.Input;

namespace Microsoft.Maui.Platform.Linux.Handlers;

internal class RelayCommand : ICommand
{
	private readonly Action _execute;

	private readonly Func<bool>? _canExecute;

	public event EventHandler? CanExecuteChanged;

	public RelayCommand(Action execute, Func<bool>? canExecute = null)
	{
		_execute = execute ?? throw new ArgumentNullException("execute");
		_canExecute = canExecute;
	}

	public bool CanExecute(object? parameter)
	{
		return _canExecute?.Invoke() ?? true;
	}

	public void Execute(object? parameter)
	{
		_execute();
	}

	public void RaiseCanExecuteChanged()
	{
		this.CanExecuteChanged?.Invoke(this, EventArgs.Empty);
	}
}