VisitStructuredDocumentTagEnd

DocumentVisitor.VisitStructuredDocumentTagEnd method

Called when enumeration of a structured document tag has ended.

public virtual VisitorAction VisitStructuredDocumentTagEnd(StructuredDocumentTag sdt)
ParameterTypeDescription
sdtStructuredDocumentTagThe object that is being visited.

Return Value

A VisitorAction value that specifies how to continue the enumeration.

Examples

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

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

    // 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 StructuredDocumentTag nodes and their children.
/// </summary>
public class StructuredDocumentTagNodePrinter : DocumentVisitor
{
    public StructuredDocumentTagNodePrinter()
    {
        mBuilder = new StringBuilder();
        mVisitorIsInsideStructuredDocumentTag = 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 (mVisitorIsInsideStructuredDocumentTag) IndentAndAppendLine("[Run] \"" + run.GetText() + "\"");

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when a StructuredDocumentTag node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitStructuredDocumentTagStart(StructuredDocumentTag sdt)
    {
        IndentAndAppendLine("[StructuredDocumentTag start] Title: " + sdt.Title);
        mDocTraversalDepth++;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called after all the child nodes of a StructuredDocumentTag node have been visited.
    /// </summary>
    public override VisitorAction VisitStructuredDocumentTagEnd(StructuredDocumentTag sdt)
    {
        mDocTraversalDepth--;
        IndentAndAppendLine("[StructuredDocumentTag end]");

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

See Also

DocumentVisitor.VisitSpecialChar DocumentVisitor.VisitStructuredDocumentTagRangeEnd