/
FontSizeConverter.cs
91 lines (84 loc) · 4.42 KB
/
FontSizeConverter.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
using System;
using System.ComponentModel;
using System.Globalization;
using Xamarin.Forms.Xaml;
namespace Xamarin.Forms
{
[TypeConversion(typeof(double))]
public class FontSizeConverter : TypeConverter, IExtendedTypeConverter
{
[Obsolete("IExtendedTypeConverter.ConvertFrom is obsolete as of version 2.2.0. Please use ConvertFromInvariantString (string, IServiceProvider) instead.")]
[EditorBrowsable(EditorBrowsableState.Never)]
object IExtendedTypeConverter.ConvertFrom(CultureInfo culture, object value, IServiceProvider serviceProvider)
=> ((IExtendedTypeConverter)this).ConvertFromInvariantString(value as string, serviceProvider);
object IExtendedTypeConverter.ConvertFromInvariantString(string value, IServiceProvider serviceProvider)
{
if (value != null) {
value = value.Trim();
if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out double size))
return size;
var ignoreCase = (serviceProvider?.GetService(typeof(IConverterOptions)) as IConverterOptions)?.IgnoreCase ?? false;
var sc = ignoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal;
NamedSize? namedSize = null;
if (value.Equals(nameof(NamedSize.Default), sc))
namedSize = NamedSize.Default;
else if (value.Equals(nameof(NamedSize.Micro), sc))
namedSize = NamedSize.Micro;
else if (value.Equals(nameof(NamedSize.Small), sc))
namedSize = NamedSize.Small;
else if (value.Equals(nameof(NamedSize.Medium), sc))
namedSize = NamedSize.Medium;
else if (value.Equals(nameof(NamedSize.Large), sc))
namedSize = NamedSize.Large;
else if (value.Equals(nameof(NamedSize.Body), sc))
namedSize = NamedSize.Body;
else if (value.Equals(nameof(NamedSize.Caption), sc))
namedSize = NamedSize.Caption;
else if (value.Equals(nameof(NamedSize.Header), sc))
namedSize = NamedSize.Header;
else if (value.Equals(nameof(NamedSize.Subtitle), sc))
namedSize = NamedSize.Subtitle;
else if (value.Equals(nameof(NamedSize.Title), sc))
namedSize = NamedSize.Title;
else if (Enum.TryParse(value, ignoreCase, out NamedSize ns))
namedSize = ns;
if (namedSize.HasValue) {
var type = serviceProvider.GetService(typeof(IProvideValueTarget)) is IProvideValueTarget valueTargetProvider ? valueTargetProvider.TargetObject.GetType() : typeof(Label);
return Device.GetNamedSize(namedSize.Value, type, false);
}
}
throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double)));
}
public override object ConvertFromInvariantString(string value)
{
if (value != null) {
if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out double size))
return size;
value = value.Trim();
if (value.Equals(nameof(NamedSize.Default), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Default, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Micro), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Micro, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Small), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Small, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Medium), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Medium, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Large), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Large, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Body), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Body, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Caption), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Caption, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Header), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Header, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Subtitle), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Subtitle, typeof(Label), false);
if (value.Equals(nameof(NamedSize.Title), StringComparison.Ordinal))
return Device.GetNamedSize(NamedSize.Title, typeof(Label), false);
if (Enum.TryParse(value, out NamedSize namedSize))
return Device.GetNamedSize(namedSize, typeof(Label), false);
}
throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double)));
}
}
}