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#region PDFsharp - A .NET library for processing PDF
//
// Authors:
// Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2008 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#endregion
using System;
using System.Diagnostics;
using System.Collections;
using System.Text;
using System.IO;
using PdfSharp.Internal;
using PdfSharp.Pdf.IO;
namespace PdfSharp.Pdf
{
/// <summary>
/// Represents a direct boolean value.
/// </summary>
[DebuggerDisplay("({Value})")]
public sealed class PdfBoolean : PdfItem
{
/// <summary>
/// Initializes a new instance of the <see cref="PdfBoolean"/> class.
/// </summary>
public PdfBoolean()
{
}
/// <summary>
/// Initializes a new instance of the <see cref="PdfBoolean"/> class.
/// </summary>
public PdfBoolean(bool value)
{
this.value = value;
}
/// <summary>
/// Gets the value of this instance as boolean value.
/// </summary>
public bool Value
{
// This class must behave like a value type. Therefore it cannot be changed (like System.String).
get { return this.value; }
}
bool value;
/// <summary>
/// A pre-defined value that represents <c>true</c>.
/// </summary>
public static readonly PdfBoolean True = new PdfBoolean(true);
/// <summary>
/// A pre-defined value that represents <c>false</c>.
/// </summary>
public static readonly PdfBoolean False = new PdfBoolean(false);
/// <summary>
/// Returns 'false' or 'true'.
/// </summary>
public override string ToString()
{
return this.value ? bool.TrueString : bool.FalseString;
}
/// <summary>
/// Writes 'true' or 'false'.
/// </summary>
internal override void WriteObject(PdfWriter writer)
{
writer.Write(this);
}
}
}
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