зеркало из https://github.com/DeGsoft/maui-linux.git
71 строка
3.3 KiB
C#
71 строка
3.3 KiB
C#
using System;
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using System.ComponentModel;
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using System.Globalization;
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using Xamarin.Forms.Xaml;
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namespace Xamarin.Forms
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{
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[TypeConversion(typeof(double))]
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public class FontSizeConverter : TypeConverter, IExtendedTypeConverter
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{
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[Obsolete("IExtendedTypeConverter.ConvertFrom is obsolete as of version 2.2.0. Please use ConvertFromInvariantString (string, IServiceProvider) instead.")]
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[EditorBrowsable(EditorBrowsableState.Never)]
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object IExtendedTypeConverter.ConvertFrom(CultureInfo culture, object value, IServiceProvider serviceProvider)
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=> ((IExtendedTypeConverter)this).ConvertFromInvariantString(value as string, serviceProvider);
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object IExtendedTypeConverter.ConvertFromInvariantString(string value, IServiceProvider serviceProvider)
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{
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if (value != null) {
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value = value.Trim();
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if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out double size))
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return size;
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var ignoreCase = (serviceProvider?.GetService(typeof(IConverterOptions)) as IConverterOptions)?.IgnoreCase ?? false;
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var sc = ignoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal;
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NamedSize? namedSize = null;
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if (value.Equals(nameof(NamedSize.Default), sc))
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namedSize = NamedSize.Default;
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else if (value.Equals(nameof(NamedSize.Micro), sc))
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namedSize = NamedSize.Micro;
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else if (value.Equals(nameof(NamedSize.Small), sc))
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namedSize = NamedSize.Small;
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else if (value.Equals(nameof(NamedSize.Medium), sc))
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namedSize = NamedSize.Medium;
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else if (value.Equals(nameof(NamedSize.Large), sc))
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namedSize = NamedSize.Large;
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else if (Enum.TryParse(value, ignoreCase, out NamedSize ns))
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namedSize = ns;
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if (namedSize.HasValue) {
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var type = serviceProvider.GetService(typeof(IProvideValueTarget)) is IProvideValueTarget valueTargetProvider ? valueTargetProvider.TargetObject.GetType() : typeof(Label);
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return Device.GetNamedSize(namedSize.Value, type, false);
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}
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}
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throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double)));
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}
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public override object ConvertFromInvariantString(string value)
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{
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if (value != null) {
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if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out double size))
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return size;
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value = value.Trim();
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if (value.Equals(nameof(NamedSize.Default), StringComparison.Ordinal))
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return Device.GetNamedSize(NamedSize.Default, typeof(Label), false);
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if (value.Equals(nameof(NamedSize.Micro), StringComparison.Ordinal))
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return Device.GetNamedSize(NamedSize.Micro, typeof(Label), false);
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if (value.Equals(nameof(NamedSize.Small), StringComparison.Ordinal))
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return Device.GetNamedSize(NamedSize.Small, typeof(Label), false);
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if (value.Equals(nameof(NamedSize.Medium), StringComparison.Ordinal))
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return Device.GetNamedSize(NamedSize.Medium, typeof(Label), false);
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if (value.Equals(nameof(NamedSize.Large), StringComparison.Ordinal))
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return Device.GetNamedSize(NamedSize.Large, typeof(Label), false);
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if (Enum.TryParse(value, out NamedSize namedSize))
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return Device.GetNamedSize(namedSize, typeof(Label), false);
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}
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throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double)));
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}
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}
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} |