CommentRangeStart

CommentRangeStart class

Denotes the start of a region of text that has a comment associated with it.

To learn more, visit the Working with Comments documentation article.

public sealed class CommentRangeStart : Node

Constructors

Name	Description
CommentRangeStart(DocumentBase, int)	Initializes a new instance of this class.

Properties

Name	Description
CustomNodeId { get; set; }	Specifies custom node identifier.
virtual Document { get; }	Gets the document to which this node belongs.
Id { get; set; }	Specifies the identifier of the comment to which this region is linked.
virtual IsComposite { get; }	Returns `true` if this node can contain other nodes.
NextSibling { get; }	Gets the node immediately following this node.
override NodeType { get; }	Returns CommentRangeStart.
ParentNode { get; }	Gets the immediate parent of this node.
PreviousSibling { get; }	Gets the node immediately preceding this node.
Range { get; }	Returns a `Range` object that represents the portion of a document that is contained in this node.

Methods

Name	Description
override Accept(DocumentVisitor)	Accepts a visitor.
Clone(bool)	Creates a duplicate of the node.
GetAncestor(NodeType)	Gets the first ancestor of the specified `NodeType`.
GetAncestor(Type)	Gets the first ancestor of the specified object type.
virtual GetText()	Gets the text of this node and of all its children.
NextPreOrder(Node)	Gets next node according to the pre-order tree traversal algorithm.
PreviousPreOrder(Node)	Gets the previous node according to the pre-order tree traversal algorithm.
Remove()	Removes itself from the parent.
ToString(SaveFormat)	Exports the content of the node into a string in the specified format.
ToString(SaveOptions)	Exports the content of the node into a string using the specified save options.

Remarks

To create a comment anchored to a region of text, you need to create a Comment and then create CommentRangeStart and CommentRangeEnd and set their identifiers to the same Id value.

CommentRangeStart is an inline-level node and can only be a child of Paragraph.

Examples

Shows how print the contents of all comments and their comment ranges using a document visitor.

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

    Comment newComment = new Comment(doc)
    {
        Author = "VDeryushev",
        Initial = "VD",
        DateTime = DateTime.Now
    };

    newComment.SetText("Comment regarding text.");

    // Add text to the document, warp it in a comment range, and then add your comment.
    Paragraph para = doc.FirstSection.Body.FirstParagraph;
    para.AppendChild(new CommentRangeStart(doc, newComment.Id));
    para.AppendChild(new Run(doc, "Commented text."));
    para.AppendChild(new CommentRangeEnd(doc, newComment.Id));
    para.AppendChild(newComment); 

    // Add two replies to the comment.
    newComment.AddReply("John Doe", "JD", DateTime.Now, "New reply.");
    newComment.AddReply("John Doe", "JD", DateTime.Now, "Another reply.");

    PrintAllCommentInfo(doc.GetChildNodes(NodeType.Comment, true));
}

/// <summary>
/// Iterates over every top-level comment and prints its comment range, contents, and replies.
/// </summary>
private static void PrintAllCommentInfo(NodeCollection comments)
{
    CommentInfoPrinter commentVisitor = new CommentInfoPrinter();

    // Iterate over all top-level comments. Unlike reply-type comments, top-level comments have no ancestor.
    foreach (Comment comment in comments.Where(c => ((Comment)c).Ancestor == null))
    {
        // First, visit the start of the comment range.
        CommentRangeStart commentRangeStart = (CommentRangeStart)comment.PreviousSibling.PreviousSibling.PreviousSibling;
        commentRangeStart.Accept(commentVisitor);

        // Then, visit the comment, and any replies that it may have.
        comment.Accept(commentVisitor);
        // Visit only start of the comment.
        comment.AcceptStart(commentVisitor);
        // Visit only end of the comment.
        comment.AcceptEnd(commentVisitor);

        foreach (Comment reply in comment.Replies)
            reply.Accept(commentVisitor);

        // Finally, visit the end of the comment range, and then print the visitor's text contents.
        CommentRangeEnd commentRangeEnd = (CommentRangeEnd)comment.PreviousSibling;
        commentRangeEnd.Accept(commentVisitor);

        Console.WriteLine(commentVisitor.GetText());
    }
}

/// <summary>
/// Prints information and contents of all 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;
}