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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 PDF name value.
/// </summary>
[DebuggerDisplay("({Value})")]
public sealed class PdfName : PdfItem
{
/// <summary>
/// Initializes a new instance of the <see cref="PdfName"/> class.
/// </summary>
public PdfName()
{
this.value = "/"; // Empty name.
}
/// <summary>
/// Initializes a new instance of the <see cref="PdfName"/> class.
/// </summary>
public PdfName(string value)
{
if (value == null)
throw new ArgumentNullException("value");
if (value.Length == 0 || value[0] != '/')
throw new ArgumentException(PSSR.NameMustStartWithSlash);
this.value = value;
}
/// <summary>
/// Determines whether the specified object is equal to this name.
/// </summary>
public override bool Equals(object obj)
{
return this.value.Equals(obj);
}
/// <summary>
/// Returns the hash code for this instance.
/// </summary>
public override int GetHashCode()
{
return this.value.GetHashCode();
}
/// <summary>
/// Gets the name as a string.
/// </summary>
public string Value
{
// This class must behave like a value type. Therefore it cannot be changed (like System.String).
get { return this.value; }
}
string value;
/// <summary>
/// Returns the name. The string always begins with a slash.
/// </summary>
public override string ToString()
{
return this.value;
}
/// <summary>
/// Determines whether the specified name and string are equal.
/// </summary>
public static bool operator ==(PdfName name, string str)
{
return name.value == str;
}
/// <summary>
/// Determines whether the specified name and string are not equal.
/// </summary>
public static bool operator !=(PdfName name, string str)
{
return name.value != str;
}
#if leads_to_ambiguity
public static bool operator ==(string str, PdfName name)
{
return str == name.value;
}
public static bool operator !=(string str, PdfName name)
{
return str == name.value;
}
public static bool operator ==(PdfName name1, PdfName name2)
{
return name1.value == name2.value;
}
public static bool operator !=(PdfName name1, PdfName name2)
{
return name1.value != name2.value;
}
#endif
/// <summary>
/// Represents the empty name.
/// </summary>
public static readonly PdfName Empty = new PdfName("/");
/// <summary>
/// Writes the name including the leading slash.
/// </summary>
internal override void WriteObject(PdfWriter writer)
{
// TODO: what if unicode character are part of the name?
writer.Write(this);
}
/// <summary>
/// Gets the comparer for this type.
/// </summary>
public static PdfXNameComparer Comparer
{
get { return new PdfXNameComparer(); }
}
/// <summary>
/// Implements a comparer that compares PdfName objects.
/// </summary>
public class PdfXNameComparer : IComparer
{
/// <summary>
/// Compares two objects and returns a value indicating whether one is less than, equal to, or greater than the other.
/// </summary>
/// <param name="x">The first object to compare.</param>
/// <param name="y">The second object to compare.</param>
public int Compare(object x, object y)
{
PdfName l = x as PdfName;
PdfName r = y as PdfName;
if (l != null)
{
if (r != null)
return l.value.CompareTo(r.value);
else
return -1;
}
else if (r != null)
return 1;
else
return 0;
}
}
}
}
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