CommentRangeStartAccept Method

public override bool Accept(
	DocumentVisitor visitor
)

Public Overrides Function Accept ( 
	visitor As DocumentVisitor
) As Boolean

public:
virtual bool Accept(
	DocumentVisitor^ visitor
) override

abstract Accept : 
        visitor : DocumentVisitor -> bool 
override Accept : 
        visitor : DocumentVisitor -> bool 

public void CreateCommentsAndPrintAllInfo()
{
    Document doc = new Document();
    doc.RemoveAllChildren();

    Section sect = (Section)doc.AppendChild(new Section(doc));
    Body body = (Body)sect.AppendChild(new Body(doc));

    // Create a commented text with several comment replies
    for (int i = 0; i <= 10; i++)
    {
        Comment newComment = CreateComment(doc, "VDeryushev", "VD", DateTime.Now, "My test comment " + i);

        Paragraph para = (Paragraph)body.AppendChild(new Paragraph(doc));
        para.AppendChild(new CommentRangeStart(doc, newComment.Id));
        para.AppendChild(new Run(doc, "Commented text " + i));
        para.AppendChild(new CommentRangeEnd(doc, newComment.Id));
        para.AppendChild(newComment);

        for (int y = 0; y <= 2; y++)
        {
            newComment.AddReply("John Doe", "JD", DateTime.Now, "New reply " + y);
        }
    }

    // Look at information of our comments
    PrintAllCommentInfo(ExtractComments(doc));
}

/// <summary>
/// Create a new comment
/// </summary>
public static Comment CreateComment(Document doc, string author, string initials, DateTime dateTime, string text)
{
    Comment newComment = new Comment(doc)
    {
        Author = author, Initial = initials, DateTime = dateTime
    };
    newComment.SetText(text);

    return newComment;
}

/// <summary>
/// Extract comments from the document without replies.
/// </summary>
public static List<Comment> ExtractComments(Document doc)
{
    List<Comment> collectedComments = new List<Comment>();

    NodeCollection comments = doc.GetChildNodes(NodeType.Comment, true);

    foreach (Comment comment in comments)
    {
        // All replies have ancestor, so we will add this check
        if (comment.Ancestor == null)
        {
            collectedComments.Add(comment);
        }
    }

    return collectedComments;
}

/// <summary>
/// Use an iterator and a visitor to print info of every comment from within a document.
/// </summary>
private static void PrintAllCommentInfo(List<Comment> comments)
{
    // Create an object that inherits from the DocumentVisitor class
    CommentInfoPrinter commentVisitor = new CommentInfoPrinter();

    // Get the enumerator from the document's comment collection and iterate over the comments
    using (IEnumerator<Comment> enumerator = comments.GetEnumerator())
    {
        while (enumerator.MoveNext())
        {
            Comment currentComment = enumerator.Current;

            // Accept our DocumentVisitor it to print information about our comments
            if (currentComment != null)
            {
                // Get CommentRangeStart from our current comment and construct its information
                CommentRangeStart commentRangeStart = (CommentRangeStart)currentComment.PreviousSibling.PreviousSibling.PreviousSibling;
                commentRangeStart.Accept(commentVisitor);

                // Construct current comment information
                currentComment.Accept(commentVisitor);

                // Get CommentRangeEnd from our current comment and construct its information
                CommentRangeEnd commentRangeEnd = (CommentRangeEnd)currentComment.PreviousSibling;
                commentRangeEnd.Accept(commentVisitor);
            }
        }

        // Output of all information received
        Console.WriteLine(commentVisitor.GetText());
    }
}

/// <summary>
/// This Visitor implementation prints information about and contents of comments and comment ranges encountered in the document.
/// </summary>
public class CommentInfoPrinter : DocumentVisitor
{
    public CommentInfoPrinter()
    {
        mBuilder = new StringBuilder();
        mVisitorIsInsideComment = false;
    }

    /// <summary>
    /// Gets the plain text of the document that was accumulated by the visitor.
    /// </summary>
    public string GetText()
    {
        return mBuilder.ToString();
    }

    /// <summary>
    /// Called when a Run node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitRun(Run run)
    {
        if (mVisitorIsInsideComment) IndentAndAppendLine("[Run] \"" + run.Text + "\"");

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when a CommentRangeStart node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitCommentRangeStart(CommentRangeStart commentRangeStart)
    {
        IndentAndAppendLine("[Comment range start] ID: " + commentRangeStart.Id);
        mDocTraversalDepth++;
        mVisitorIsInsideComment = true;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when a CommentRangeEnd node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitCommentRangeEnd(CommentRangeEnd commentRangeEnd)
    {
        mDocTraversalDepth--;
        IndentAndAppendLine("[Comment range end] ID: " + commentRangeEnd.Id + "\n");
        mVisitorIsInsideComment = false;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when a Comment node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitCommentStart(Comment comment)
    {
        IndentAndAppendLine(
            $"[Comment start] For comment range ID {comment.Id}, By {comment.Author} on {comment.DateTime}");
        mDocTraversalDepth++;
        mVisitorIsInsideComment = true;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when the visiting of a Comment node is ended in the document.
    /// </summary>
    public override VisitorAction VisitCommentEnd(Comment comment)
    {
        mDocTraversalDepth--;
        IndentAndAppendLine("[Comment end]");
        mVisitorIsInsideComment = false;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Append a line to the StringBuilder and indent it depending on how deep the visitor is into the document tree.
    /// </summary>
    /// <param name="text"></param>
    private void IndentAndAppendLine(string text)
    {
        for (int i = 0; i < mDocTraversalDepth; i++)
        {
            mBuilder.Append("|  ");
        }

        mBuilder.AppendLine(text);
    }

    private bool mVisitorIsInsideComment;
    private int mDocTraversalDepth;
    private readonly StringBuilder mBuilder;
}