#region PDFsharp - A .NET library for processing PDF

//

// Authors:

// Stefan Lange

//

// Copyright (c) 2005-2016 empira Software GmbH, Cologne Area (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.Diagnostics;

using PdfSharpCore.Pdf.IO;

namespace PdfSharpCore.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)

{

_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 _value; }

}

readonly 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 _value ? bool.TrueString : bool.FalseString;

}

/// <summary>

/// Writes 'true' or 'false'.

/// </summary>

internal override void WriteObject(PdfWriter writer)

{

writer.Write(this);

}

}

}