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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
using System;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;
using System.Windows.Media.Animation;
using System.Security;
namespace System.Windows
{
/// <summary>
///
/// </summary>
public class KeyTimeConverter : TypeConverter
{
/// <summary>
/// Returns whether or not this class can convert from a given type
/// to an instance of a KeyTime.
/// </summary>
public override bool CanConvertFrom(
ITypeDescriptorContext typeDescriptorContext,
Type type)
{
if (type == typeof(string))
{
return true;
}
else
{
return base.CanConvertFrom(
typeDescriptorContext,
type);
}
}
/// <summary>
/// Returns whether or not this class can convert from an instance of a
/// KeyTime to a given type.
/// </summary>
public override bool CanConvertTo(
ITypeDescriptorContext typeDescriptorContext,
Type type)
{
if ( type == typeof(InstanceDescriptor)
|| type == typeof(string))
{
return true;
}
else
{
return base.CanConvertTo(
typeDescriptorContext,
type);
}
}
/// <summary>
///
/// </summary>
public override object ConvertFrom(
ITypeDescriptorContext typeDescriptorContext,
CultureInfo cultureInfo,
object value)
{
string stringValue = value as string;
if (stringValue != null)
{
stringValue = stringValue.Trim();
if (stringValue == "Uniform")
{
return KeyTime.Uniform;
}
else if (stringValue == "Paced")
{
return KeyTime.Paced;
}
else if (stringValue[stringValue.Length - 1] == '%')
{
stringValue = stringValue.TrimEnd('%');
double doubleValue = (double)TypeDescriptor.GetConverter(
typeof(double)).ConvertFrom(
typeDescriptorContext,
cultureInfo,
stringValue);
if (doubleValue == 0.0)
{
return KeyTime.FromPercent(0.0);
}
else if (doubleValue == 100.0)
{
return KeyTime.FromPercent(1.0);
}
else
{
return KeyTime.FromPercent(doubleValue / 100.0);
}
}
else
{
TimeSpan timeSpanValue = (TimeSpan)TypeDescriptor.GetConverter(
typeof(TimeSpan)).ConvertFrom(
typeDescriptorContext,
cultureInfo,
stringValue);
return KeyTime.FromTimeSpan(timeSpanValue);
}
}
return base.ConvertFrom(
typeDescriptorContext,
cultureInfo,
value);
}
/// <summary>
///
/// </summary>
public override object ConvertTo(
ITypeDescriptorContext typeDescriptorContext,
CultureInfo cultureInfo,
object value,
Type destinationType)
{
if ( value != null
&& value is KeyTime)
{
KeyTime keyTime = (KeyTime)value;
if (destinationType == typeof(InstanceDescriptor))
{
MemberInfo mi;
switch (keyTime.Type)
{
case KeyTimeType.Percent:
mi = typeof(KeyTime).GetMethod("FromPercent", new Type[] { typeof(double) });
return new InstanceDescriptor(mi, new object[] { keyTime.Percent });
case KeyTimeType.TimeSpan:
mi = typeof(KeyTime).GetMethod("FromTimeSpan", new Type[] { typeof(TimeSpan) });
return new InstanceDescriptor(mi, new object[] { keyTime.TimeSpan });
case KeyTimeType.Uniform:
mi = typeof(KeyTime).GetProperty("Uniform");
return new InstanceDescriptor(mi, null);
case KeyTimeType.Paced:
mi = typeof(KeyTime).GetProperty("Paced");
return new InstanceDescriptor(mi, null);
}
}
else if (destinationType == typeof(String))
{
switch (keyTime.Type)
{
case KeyTimeType.Uniform:
return "Uniform";
case KeyTimeType.Paced:
return "Paced";
case KeyTimeType.Percent:
string returnValue = (string)TypeDescriptor.GetConverter(
typeof(Double)).ConvertTo(
typeDescriptorContext,
cultureInfo,
keyTime.Percent * 100.0,
destinationType);
return string.Concat(returnValue, (ReadOnlySpan<char>)stackalloc char[] { '%' });
case KeyTimeType.TimeSpan:
return TypeDescriptor.GetConverter(
typeof(TimeSpan)).ConvertTo(
typeDescriptorContext,
cultureInfo,
keyTime.TimeSpan,
destinationType);
}
}
}
return base.ConvertTo(
typeDescriptorContext,
cultureInfo,
value,
destinationType);
}
}
}
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