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42 lines
1.2 KiB
42 lines
1.2 KiB
using Connected.Components;
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namespace Connected.Utilities.BindingConverters;
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public class RangeConverter<T> : ToStringConverter<Range<T>>
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{
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private readonly DefaultConverter<T> _converter;
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public RangeConverter() => _converter = new DefaultConverter<T>();
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protected override string? ConvertValue(Range<T>? value) => value is not null
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? Join(_converter.Convert(value.Start), _converter.Convert(value.End))
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: string.Empty;
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protected override Range<T>? ConvertValueBack(string? value)
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{
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return !Split(value, out var valueStart, out var valueEnd)
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? null
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: new Range<T>(_converter.ConvertBack(valueStart), _converter.ConvertBack(valueEnd));
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}
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public static string Join(string? valueStart, string? valueEnd) => string.IsNullOrEmpty(valueStart) && string.IsNullOrEmpty(valueEnd) ? string.Empty : $"[{valueStart};{valueEnd}]";
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public static bool Split(string? value, out string? valueStart, out string? valueEnd)
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{
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valueStart = valueEnd = string.Empty;
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if (string.IsNullOrEmpty(value) || value[0] != '[' || value[^1] != ']')
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return false;
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var idx = value.IndexOf(';');
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if (idx < 1)
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return false;
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valueStart = value[1..idx];
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valueEnd = value[(idx + 1)..^1];
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return true;
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}
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}
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