90 lines
3.9 KiB
C#
90 lines
3.9 KiB
C#
using System.Globalization;
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using Avalonia.Data.Converters;
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using Avalonia.Media;
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using ClaudeDo.Ui.ViewModels.Islands;
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namespace ClaudeDo.Ui.Converters;
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// One-expression converters. Each is only worth a class because Avalonia XAML can't
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// instantiate a generic FuncValueConverter as a resource; they stay one per type so the
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// x:Key names in App.axaml keep resolving. Anything with real logic gets its own file.
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/// <summary>
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/// A stored list/folder colour to a brush: "#RRGGBB" becomes a <see cref="SolidColorBrush"/>, a swatch key
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/// ("Swatch3") resolves to the app resource "Swatch3Brush"; null, empty or unknown falls back to the resource named by the parameter.
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/// </summary>
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public sealed class ColorBrushConverter : OneWayConverter
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{
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public static ColorBrushConverter Instance { get; } = new();
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public override object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> Resolve(value as string, parameter as string, LookupResource);
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private static object? LookupResource(string key)
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=> Avalonia.Application.Current?.TryGetResource(key, null, out var res) == true ? res : null;
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/// <summary>Resolves a stored colour against <paramref name="lookup"/> (app resources in production); split out so tests need no Avalonia app.</summary>
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internal static object? Resolve(string? value, string? fallbackKey, Func<string, object?> lookup)
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{
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if (value is { Length: > 0 })
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{
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if (value[0] == '#')
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{
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if (Color.TryParse(value, out var c)) return new SolidColorBrush(c);
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}
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else if (lookup(value + "Brush") is { } swatch) return swatch;
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}
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return fallbackKey is null ? null : lookup(fallbackKey);
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}
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}
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/// <summary>True when the value's string form equals the parameter (segmented-switch active state).</summary>
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public sealed class EqualsParameterConverter : OneWayConverter
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{
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public static EqualsParameterConverter Instance { get; } = new();
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public override object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> Equals(value?.ToString(), parameter as string);
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}
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public sealed class UpperCaseConverter : OneWayConverter
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{
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public static UpperCaseConverter Instance { get; } = new();
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public override object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> value?.ToString()?.ToUpperInvariant();
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}
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public sealed class StrikeIfTrueConverter : OneWayConverter
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{
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public static StrikeIfTrueConverter Instance { get; } = new();
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public override object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> value is true ? TextDecorations.Strikethrough : null;
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}
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public sealed class BoolToItalicConverter : OneWayConverter
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{
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public override object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> value is true ? FontStyle.Italic : FontStyle.Normal;
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}
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public sealed class BoolToDraftOpacityConverter : OneWayConverter
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{
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public override object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> value is true ? 0.7 : 1.0;
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}
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// Drives ListBoxItem.Focusable for TasksIslandView's flat Rows list: a HeaderRow container must
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// not be a tab stop, a TaskRowViewModel container must behave like any other row.
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public sealed class NotHeaderRowConverter : OneWayConverter
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{
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public static NotHeaderRowConverter Instance { get; } = new();
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public override object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> value is not HeaderRow;
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}
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public abstract class OneWayConverter : IValueConverter
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{
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public abstract object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture);
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public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
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=> throw new NotSupportedException();
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}
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