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omegapro/PowerTools/Classes/ContentFormatAccessor.cs

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+/***************************************************************************
+
+Copyright (c) Microsoft Corporation 2011.
+
+This code is licensed using the Microsoft Public License (Ms-PL).  The text of the license can be found here:
+
+http://www.microsoft.com/resources/sharedsource/licensingbasics/publiclicense.mspx
+
+***************************************************************************/
+
+using System;
+using System.Xml;
+using System.Xml.Linq;
+using DocumentFormat.OpenXml.Packaging;
+
+namespace OpenXmlPowerTools
+{
+    /// <summary>
+    /// Provides access to content format operations
+    /// </summary>
+    public class ContentFormatAccessor
+    {
+        /// <summary>
+        /// Inserts Xml markup representing format attributes inside a specific paragraph or paragraph run
+        /// </summary>
+        /// <param name="document">Document to insert formatting Xml tags</param>
+        /// <param name="xpathInsertionPoint">Paragraph or paragraph run to set format</param>
+        /// <param name="content">Formatting tags</param>
+        public static OpenXmlPowerToolsDocument Insert(WmlDocument doc, string xpathInsertionPoint, string content)
+        {
+            using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
+            {
+                using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
+                {
+                    XDocument xDocument = document.MainDocumentPart.GetXDocument();
+                    XmlDocument xmlMainDocument = new XmlDocument();
+                    xmlMainDocument.Load(xDocument.CreateReader());
+
+                    XmlNamespaceManager namespaceManager = new XmlNamespaceManager(new NameTable());
+                    namespaceManager.AddNamespace("w", "http://schemas.openxmlformats.org/wordprocessingml/2006/main");
+
+                    XmlNodeList insertionPoints = xmlMainDocument.SelectNodes(xpathInsertionPoint, namespaceManager);
+
+                    if (insertionPoints.Count == 0)
+                        throw new ArgumentException("The xpath query did not return a valid location.");
+
+                    foreach (XmlNode insertionPoint in insertionPoints)
+                    {
+                        XmlNode propertiesElement = insertionPoint.SelectSingleNode(@"w:pPr|w:rPr", namespaceManager);
+                        if (insertionPoint.Name == "w:p")
+                        {
+                            // Checks if the rPr or pPr element exists
+                            if (propertiesElement == null)
+                            {
+                                propertiesElement = xmlMainDocument.CreateElement("w", "pPr", namespaceManager.LookupNamespace("w"));
+                                insertionPoint.PrependChild(propertiesElement);
+                            }
+                        }
+                        else if (insertionPoint.Name == "w:r")
+                        {
+                            // Checks if the rPr or pPr element exists
+                            if (propertiesElement == null)
+                            {
+                                propertiesElement = xmlMainDocument.CreateElement("w", "rPr", namespaceManager.LookupNamespace("w"));
+                                insertionPoint.PrependChild(propertiesElement);
+                            }
+                        }
+
+                        if (propertiesElement != null)
+                        {
+                            propertiesElement.InnerXml += content;
+                        }
+                        else
+                        {
+                            throw new ArgumentException("Specified xpath query result is not a valid location to place a formatting markup");
+                        }
+
+                    }
+                    XDocument xNewDocument = new XDocument();
+                    using (XmlWriter xWriter = xNewDocument.CreateWriter())
+                        xmlMainDocument.WriteTo(xWriter);
+                    document.MainDocumentPart.PutXDocument(xNewDocument);
+                }
+                return streamDoc.GetModifiedDocument();
+            }
+        }
+    }
+}