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omegapro/PowerTools/Classes/CommentAccessor.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.Collections.Generic;
+using System.Linq;
+using System.Xml.Linq;
+using DocumentFormat.OpenXml.Packaging;
+
+namespace OpenXmlPowerTools
+{
+    public partial class WmlDocument : OpenXmlPowerToolsDocument
+    {
+        public object GetAllComments(CommentFormat format)
+        {
+            return CommentAccessor.GetAllComments(this, format);
+        }
+    }
+
+    public enum CommentFormat
+    {
+        PlainText,
+        Xml,
+        Docx
+    }
+
+    /// <summary>
+    /// Provides access to comment operations
+    /// </summary>
+    public class CommentAccessor
+    {
+        public static object GetAllComments(WmlDocument doc, CommentFormat format)
+        {
+            using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
+            using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
+            {
+                IEnumerable<XElement> comments = null;
+                WordprocessingCommentsPart commentsPart = document.MainDocumentPart.WordprocessingCommentsPart;
+                if (commentsPart != null)
+                {
+                    XDocument commentsPartDocument = commentsPart.GetXDocument();
+                    comments = commentsPartDocument.Element(W.comments).Elements(W.comment);
+                }
+                if (comments != null)
+                {
+                    XDocument commentsDocument =
+                        new XDocument(
+                            new XElement(W.comments,
+                                new XAttribute(XNamespace.Xmlns + "w", W.w),
+                                comments
+                            )
+                        );
+                    switch (format)
+                    {
+                        case CommentFormat.PlainText:
+                            return commentsDocument.ToString();
+                        case CommentFormat.Xml:
+                            return commentsDocument;
+                        case CommentFormat.Docx:
+                            return CreateCommentsDocument(comments);
+                    }
+                }
+                return null;
+            }
+        }
+
+        private static OpenXmlPowerToolsDocument CreateCommentsDocument(IEnumerable<XElement> contents)
+        {
+            using (OpenXmlMemoryStreamDocument streamDoc = OpenXmlMemoryStreamDocument.CreateWordprocessingDocument())
+            {
+                using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
+                {
+                    PowerToolsExtensions.SetContent(document, contents);
+                }
+                return streamDoc.GetModifiedDocument();
+            }
+        }
+
+        /// <summary>
+        /// Returns all reference tags from inside the main part of a wordprocessing document
+        /// </summary>
+        private static IEnumerable<XElement> CommentReferences(WordprocessingDocument document)
+        {
+            XDocument mainDocument = document.MainDocumentPart.GetXDocument();
+
+            IEnumerable<XElement> results =
+                mainDocument.Descendants().Where(
+                    tag =>
+                        tag.Name == W.commentRangeStart ||
+                        tag.Name == W.commentRangeEnd ||
+                        (tag.Name == W.r && tag.Descendants(W.commentReference).Count() > 0)
+                );
+            return results;
+        }
+
+        /// <summary>
+        /// Removes all of the comments existing in the document
+        /// </summary>
+        public static OpenXmlPowerToolsDocument RemoveAll(WmlDocument doc)
+        {
+            using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
+            {
+                using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
+                {
+                    //Removes comment-related tags inside the main document part
+                    IEnumerable<XElement> commentReferences = CommentReferences(document).ToList();
+                    commentReferences.Remove();
+                    document.MainDocumentPart.PutXDocument();
+
+                    WordprocessingCommentsPart commentsPart = document.MainDocumentPart.WordprocessingCommentsPart;
+                    if (commentsPart != null)
+                        commentsPart.RemovePart();
+                }
+                return streamDoc.GetModifiedDocument();
+            }
+        }
+    }
+}