95 lines
3.6 KiB
C#
95 lines
3.6 KiB
C#
#region MigraDoc - Creating Documents on the Fly
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//
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// Authors:
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// Stefan Lange
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// Klaus Potzesny
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// David Stephensen
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//
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// Copyright (c) 2001-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://www.migradoc.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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namespace MigraDoc.DocumentObjectModel
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{
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/// <summary>
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/// Provides relational information between document objects.
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/// </summary>
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public class DocumentRelations
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{
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/// <summary>
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/// Determines whether the specified documentObject has a
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/// parent of the given type somewhere within the document hierarchy.
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/// </summary>
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/// <param name="documentObject">The document object to check.</param>
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/// <param name="type">The parent type to search for.</param>
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public static bool HasParentOfType(DocumentObject documentObject, Type type)
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{
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if (documentObject == null)
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throw new ArgumentNullException("documentObject");
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if (type == null)
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throw new ArgumentNullException("type");
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return GetParentOfType(documentObject, type) != null;
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}
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/// <summary>
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/// Gets the direct parent of the given document object.
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/// </summary>
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/// <param name="documentObject">The document object the parent is searched for.</param>
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public static DocumentObject GetParent(DocumentObject documentObject)
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{
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if (documentObject == null)
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throw new ArgumentNullException("documentObject");
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return documentObject.Parent;
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}
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/// <summary>
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/// Gets a parent of the document object with the given type somewhere within the document hierarchy.
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/// Returns null if none exists.
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/// </summary>
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/// <param name="documentObject">The document object the parent is searched for.</param>
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/// <param name="type">The parent type to search for.</param>
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public static DocumentObject GetParentOfType(DocumentObject documentObject, Type type)
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{
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if (documentObject == null)
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throw new ArgumentNullException("documentObject");
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if (type == null)
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throw new ArgumentNullException("type");
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if (documentObject._parent != null)
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{
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if (documentObject._parent.GetType() == type)
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return documentObject._parent;
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return GetParentOfType(documentObject._parent, type);
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}
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return null;
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}
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}
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}
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