using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace Store.Management.Framework.Converters;

/// <summary>空字符串或 null 显示占位内容，其他值折叠；仅用于单向绑定。</summary>
public sealed class StringNullOrEmpty2VisibilityConverter : IValueConverter
{
	public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		=> value is null || value is string { Length: 0 } ? Visibility.Visible : Visibility.Collapsed;

	public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		=> Binding.DoNothing;
}