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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 PdfSharp.Pdf.Annotations;
using PdfSharp.Pdf.Internal;
namespace PdfSharp.Pdf.AcroForms
{
/// <summary>
/// Represents the base class for all button fields.
/// </summary>
public abstract class PdfButtonField : PdfAcroField
{
/// <summary>
/// Initializes a new instance of the <see cref="PdfButtonField"/> class.
/// </summary>
protected PdfButtonField(PdfDocument document)
: base(document)
{ }
/// <summary>
/// Initializes a new instance of the <see cref="PdfButtonField"/> class.
/// </summary>
protected PdfButtonField(PdfDictionary dict)
: base(dict)
{ }
/// <summary>
/// Gets the name which represents the opposite of /Off.
/// </summary>
protected string GetNonOffValue()
{
// Try to get the information from the appearance dictionaray.
// Just return the first key that is not /Off.
// I'm not sure what is the right solution to get this value.
PdfDictionary ap = Elements[PdfAnnotation.Keys.AP] as PdfDictionary;
if (ap != null)
{
PdfDictionary n = ap.Elements["/N"] as PdfDictionary;
if (n != null)
{
foreach (string name in n.Elements.Keys)
if (name != "/Off")
return name;
}
}
return null;
}
internal override void GetDescendantNames(ref ArrayList names, string partialName)
{
string t = Elements.GetString(Keys.T);
// HACK: ???
if (t == "")
t = "???";
Debug.Assert(t != "");
if (t.Length > 0)
{
if (partialName != null && partialName.Length > 0)
names.Add(partialName + "." + t);
else
names.Add(t);
}
}
/// <summary>
/// Predefined keys of this dictionary.
/// The description comes from PDF 1.4 Reference.
/// </summary>
public new class Keys : PdfAcroField.Keys
{
// Pushbuttons have no additional entries.
}
}
}
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