143 lines
4.7 KiB
C#
143 lines
4.7 KiB
C#
//
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// DateTimeOffsetConverter.cs
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//
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// Author:
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// Carlos Alberto Cortez (calberto.cortez@gmail.com)
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//
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// Copyright (C) 2010 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#if NET_4_0
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using System;
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using System.Globalization;
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using System.ComponentModel.Design.Serialization;
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using System.Reflection;
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namespace System.ComponentModel
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{
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public class DateTimeOffsetConverter : TypeConverter
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{
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static readonly string OffsetPattern = "K";
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static readonly string InvariantDatePattern = "yyyy-MM-dd";
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public DateTimeOffsetConverter ()
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{
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}
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public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
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{
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if (sourceType == typeof (string))
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return true;
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return base.CanConvertFrom (context, sourceType);
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}
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public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
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{
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if (destinationType == typeof (string) || destinationType == typeof (InstanceDescriptor))
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return true;
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return base.CanConvertTo (context, destinationType);
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}
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public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
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{
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if (value is string) {
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string s = ((string) value).Trim ();
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if (s.Length == 0)
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return DateTimeOffset.MinValue;
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DateTimeOffset retval;
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if (culture == null) {
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if (DateTimeOffset.TryParse (s, out retval))
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return retval;
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} else {
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DateTimeFormatInfo info = (DateTimeFormatInfo) culture.GetFormat (typeof (DateTimeFormatInfo));
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if (DateTimeOffset.TryParse (s, info, DateTimeStyles.None, out retval))
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return retval;
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}
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throw new FormatException (s + " is not a valid DateTimeOffset value.");
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}
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return base.ConvertFrom (context, culture, value);
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}
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public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
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{
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if (value is DateTimeOffset) {
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DateTimeOffset dt_offset = (DateTimeOffset) value;
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if (destinationType == typeof (string)) {
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if (dt_offset == DateTimeOffset.MinValue)
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return String.Empty;
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if (culture == null)
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culture = CultureInfo.CurrentCulture;
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// InvariantCulture gets special handling.
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if (culture == CultureInfo.InvariantCulture) {
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if (dt_offset.DateTime == dt_offset.Date)
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return dt_offset.ToString (InvariantDatePattern + " " + OffsetPattern);
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return dt_offset.ToString (culture);
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}
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DateTimeFormatInfo info = (DateTimeFormatInfo) culture.GetFormat (typeof (DateTimeFormatInfo));
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if (dt_offset.DateTime == dt_offset.Date)
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return dt_offset.ToString (info.ShortDatePattern + " " + OffsetPattern);
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// No need to pass CultureInfo, as we already consumed the proper patterns.
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return dt_offset.ToString (info.ShortDatePattern + " " + info.ShortTimePattern + " " + OffsetPattern, null);
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}
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if (destinationType == typeof (InstanceDescriptor)) {
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ConstructorInfo ctor = typeof (DateTimeOffset).GetConstructor ( GetDateTimeOffsetArgumentTypes ());
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object [] ctor_args = new object [] { dt_offset.Year, dt_offset.Month, dt_offset.Day,
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dt_offset.Hour, dt_offset.Minute, dt_offset.Second, dt_offset.Millisecond,
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dt_offset.Offset };
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return new InstanceDescriptor (ctor, ctor_args);
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}
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}
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return base.ConvertTo (context, culture, value, destinationType);
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}
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static Type [] ctor_argument_types;
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static Type [] GetDateTimeOffsetArgumentTypes ()
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{
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if (ctor_argument_types == null) {
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Type int_type = typeof (int);
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ctor_argument_types = new Type [] { int_type, int_type, int_type, int_type, int_type, int_type, int_type,
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typeof (TimeSpan) };
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}
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return ctor_argument_types;
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}
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}
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}
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#endif
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