Writing Your Own RTF Converter

// -- FILE ------------------------------------------------------------------
// name       : ToggleArgument.cs
// project    : System Framelet
// created    : Jani Giannoudis - 2008.06.03
// language   : c#
// environment: .NET 2.0
// copyright  : (c) 2004-2013 by Jani Giannoudis, Switzerland
// --------------------------------------------------------------------------
using System;

namespace Itenso.Sys.Application
{

	// ------------------------------------------------------------------------
	public class ToggleArgument : Argument
	{

		// ----------------------------------------------------------------------
		public ToggleArgument( string name, bool defaultValue ) :
			this( ArgumentType.None, name, defaultValue )
		{
		} // ToggleArgument

		// ----------------------------------------------------------------------
		public ToggleArgument( ArgumentType argumentType, string name, bool defaultValue ) :
			base( argumentType | ArgumentType.HasName | ArgumentType.ContainsValue, name, defaultValue )
		{
			if ( name == null )
			{
				throw new ArgumentNullException( "name" );
			}
		} // ToggleArgument

		// ----------------------------------------------------------------------
		public new bool Value
		{
			get { return (bool)base.Value; }
		} // Value

		// ----------------------------------------------------------------------
		public override string ToString()
		{
			return Name + "=" + ( Value ? "on" : "off" );
		} // ToString

		// ----------------------------------------------------------------------
		protected override bool OnLoad( string commandLineArg )
		{
			if ( !commandLineArg.StartsWith( Name, StringComparison.InvariantCultureIgnoreCase ) )
			{
				return false;
			}

			// format: /name
			if ( commandLineArg.Equals( Name, StringComparison.InvariantCultureIgnoreCase ) )
			{
				base.Value = true;
				return true;
			}

			// format: /name+
			string onName = Name + "+";
			if ( commandLineArg.Equals( onName, StringComparison.InvariantCultureIgnoreCase ) )
			{
				base.Value = true;
				return true;
			}

			// format: /name-
			string offName = Name + "-";
			if ( commandLineArg.Equals( offName, StringComparison.InvariantCultureIgnoreCase ) )
			{
				base.Value = false;
				return true;
			}

			return false;
		} // OnLoad

	} // class ToggleArgument

} // namespace Itenso.Sys.Application
// -- EOF -------------------------------------------------------------------