AcceptStart

Footnote.AcceptStart method

Accepts a visitor for visiting the start of the footnote.

public override VisitorAction AcceptStart(DocumentVisitor visitor)
ParameterTypeDescription
visitorDocumentVisitorThe document visitor.

Return Value

The action to be taken by the visitor.

Examples

Shows how to print the node structure of every footnote in a document.

public void FootnoteToText()
{
    Document doc = new Document(MyDir + "DocumentVisitor-compatible features.docx");
    FootnoteStructurePrinter visitor = new FootnoteStructurePrinter();

    // When we get a composite node to accept a document visitor, the visitor visits the accepting node,
    // and then traverses all the node's children in a depth-first manner.
    // The visitor can read and modify each visited node.
    doc.Accept(visitor);

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

/// <summary>
/// Traverses a node's non-binary tree of child nodes.
/// Creates a map in the form of a string of all encountered Footnote nodes and their children.
/// </summary>
public class FootnoteStructurePrinter : DocumentVisitor
{
    public FootnoteStructurePrinter()
    {
        mBuilder = new StringBuilder();
        mVisitorIsInsideFootnote = 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 Footnote node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitFootnoteStart(Footnote footnote)
    {
        IndentAndAppendLine("[Footnote start] Type: " + footnote.FootnoteType);
        mDocTraversalDepth++;
        mVisitorIsInsideFootnote = true;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called after all the child nodes of a Footnote node have been visited.
    /// </summary>
    public override VisitorAction VisitFootnoteEnd(Footnote footnote)
    {
        mDocTraversalDepth--;
        IndentAndAppendLine("[Footnote end]");
        mVisitorIsInsideFootnote = false;

        return VisitorAction.Continue;
    }

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

        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 mVisitorIsInsideFootnote;
    private int mDocTraversalDepth;
    private readonly StringBuilder mBuilder;
}

See Also

Footnote.AcceptEnd