104 lines
3.6 KiB
C#
104 lines
3.6 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;
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using System.Collections.Generic;
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using System.Diagnostics;
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using PdfSharp.Pdf.Annotations;
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namespace PdfSharp.Pdf.AcroForms
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{
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/// <summary>
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/// Represents the base class for all button fields.
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/// </summary>
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public abstract class PdfButtonField : PdfAcroField
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfButtonField"/> class.
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/// </summary>
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protected PdfButtonField(PdfDocument document)
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: base(document)
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{ }
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfButtonField"/> class.
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/// </summary>
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protected PdfButtonField(PdfDictionary dict)
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: base(dict)
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{ }
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/// <summary>
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/// Gets the name which represents the opposite of /Off.
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/// </summary>
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protected string GetNonOffValue()
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{
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// Try to get the information from the appearance dictionaray.
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// Just return the first key that is not /Off.
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// I'm not sure what is the right solution to get this value.
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PdfDictionary ap = Elements[PdfAnnotation.Keys.AP] as PdfDictionary;
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if (ap != null)
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{
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PdfDictionary n = ap.Elements["/N"] as PdfDictionary;
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if (n != null)
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{
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foreach (string name in n.Elements.Keys)
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if (name != "/Off")
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return name;
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}
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}
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return null;
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}
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internal override void GetDescendantNames(ref List<string> names, string partialName)
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{
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string t = Elements.GetString(PdfAcroField.Keys.T);
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// HACK: ???
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if (t == "")
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t = "???";
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Debug.Assert(t != "");
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if (t.Length > 0)
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{
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if (!String.IsNullOrEmpty(partialName))
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names.Add(partialName + "." + t);
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else
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names.Add(t);
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}
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}
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/// <summary>
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/// Predefined keys of this dictionary.
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/// The description comes from PDF 1.4 Reference.
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/// </summary>
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public new class Keys : PdfAcroField.Keys
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{
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// Pushbuttons have no additional entries.
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}
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}
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}
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