92 lines
3.0 KiB
C#
92 lines
3.0 KiB
C#
#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// 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, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System.Diagnostics;
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using PdfSharp.Pdf.IO;
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namespace PdfSharp.Pdf
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{
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/// <summary>
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/// Represents a direct boolean value.
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/// </summary>
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[DebuggerDisplay("({Value})")]
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public sealed class PdfBoolean : PdfItem
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfBoolean"/> class.
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/// </summary>
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public PdfBoolean()
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{ }
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfBoolean"/> class.
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/// </summary>
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public PdfBoolean(bool value)
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{
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_value = value;
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}
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/// <summary>
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/// Gets the value of this instance as boolean value.
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/// </summary>
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public bool Value
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{
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// This class must behave like a value type. Therefore it cannot be changed (like System.String).
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get { return _value; }
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}
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readonly bool _value;
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/// <summary>
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/// A pre-defined value that represents <c>true</c>.
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/// </summary>
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public static readonly PdfBoolean True = new PdfBoolean(true);
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/// <summary>
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/// A pre-defined value that represents <c>false</c>.
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/// </summary>
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public static readonly PdfBoolean False = new PdfBoolean(false);
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/// <summary>
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/// Returns 'false' or 'true'.
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/// </summary>
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public override string ToString()
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{
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return _value ? bool.TrueString : bool.FalseString;
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}
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/// <summary>
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/// Writes 'true' or 'false'.
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/// </summary>
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internal override void WriteObject(PdfWriter writer)
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{
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writer.Write(this);
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}
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}
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}
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