/*
Copyright 2006,2008 Stefano Chizzolini. http://clown.stefanochizzolini.it
Contributors:
* Stefano Chizzolini (original code developer, http://www.stefanochizzolini.it)
This file should be part of the source code distribution of "PDF Clown library"
(the Program): see the accompanying README files for more info.
This Program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later version.
This Program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY, either expressed or implied; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the License for more details.
You should have received a copy of the GNU General Public License along with this
Program (see README files); if not, go to the GNU website (http://www.gnu.org/).
Redistribution and use, with or without modification, are permitted provided that such
redistributions retain the above copyright notice, license and disclaimer, along with
this list of conditions.
*/
using System;
using System.Globalization;
using System.Text;
namespace it.stefanochizzolini.clown.objects{
/**
<summary>PDF date object [PDF:1.6:3.8.3].</summary>
*/
public class PdfDate
: PdfString
{
#region static
#region fields
private static readonly Encoding ASCIIEncoding = Encoding.ASCII;
#endregion
#region interface
#region public
public static DateTime ToDateTime(
string value
)
{
//TODO:IMPL this code is quite ugly... is there a more elegant solution?
// Normalize datetime value.
// Cut leading "D:" tag!
value = value.Substring(2);
int length = value.Length;
switch(length)
{
case 8: // Date only.
value += "000000+00:00";
break;
case 14: // Datetime without timezone.
value += "+00:00";
break;
case 15: // Datetime at UT timezone ("Z" tag).
value = value.Substring(0,length-1) + "+00:00";
break;
case 17: // Datetime at non-UT timezone without minutes.
value += ":00";
break;
case 21: // Datetime at non-UT full timezone ("'mm'" PDF timezone-minutes format).
value = value.Substring(0,length-1).Replace('\'',':');
break;
}
// Parse datetime value!
return DateTime.ParseExact(
value,
"yyyyMMddHHmmsszzz",
new CultureInfo("en-US")
);
}
#endregion
#region protected
protected static string Format(
DateTime value
)
{return ("D:" + value.ToString("yyyyMMddHHmmsszzz").Replace(':','\'') + "'");}
#endregion
#endregion
#endregion
#region dynamic
#region constructors
public PdfDate(
)
{}
public PdfDate(
DateTime value
)
{Value = value;}
#endregion
#region interface
#region public
public override object Clone(
files.File context
)
{
// Shallow copy.
return this.MemberwiseClone();
}
public override Object Value
{
get
{return ToDateTime(ASCIIEncoding.GetString(RawValue));}
set
{RawValue = ASCIIEncoding.GetBytes(Format((DateTime)value));}
}
#endregion
#endregion
#endregion
}
}
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