Accept

EditableRangeStart.Accept method

Accepts a visitor.

public override bool Accept(DocumentVisitor visitor)
ParameterTypeDescription
visitorDocumentVisitorThe visitor that will visit the node.

Return Value

false if the visitor requested the enumeration to stop.

Remarks

Calls VisitEditableRangeStart.

For more info see the Visitor design pattern.

Examples

Shows how to limit the editing rights of editable ranges to a specific group/user.

public void Visitor()
{
    Document doc = new Document();
    doc.Protect(ProtectionType.ReadOnly, "MyPassword");

    DocumentBuilder builder = new DocumentBuilder(doc);
    builder.Writeln("Hello world! Since we have set the document's protection level to read-only," +
                    " we cannot edit this paragraph without the password.");

    // When we write-protect documents, editable ranges allow us to pick specific areas that users may edit.
    // There are two mutually exclusive ways to narrow down the list of allowed editors.
    // 1 -  Specify a user:
    EditableRange editableRange = builder.StartEditableRange().EditableRange;
    editableRange.SingleUser = "john.doe@myoffice.com";
    builder.Writeln($"This paragraph is inside the first editable range, can only be edited by {editableRange.SingleUser}.");
    builder.EndEditableRange();

    Assert.AreEqual(EditorType.Unspecified, editableRange.EditorGroup);

    // 2 -  Specify a group that allowed users are associated with:
    editableRange = builder.StartEditableRange().EditableRange;
    editableRange.EditorGroup = EditorType.Administrators;
    builder.Writeln($"This paragraph is inside the first editable range, can only be edited by {editableRange.EditorGroup}.");
    builder.EndEditableRange();

    Assert.AreEqual(string.Empty, editableRange.SingleUser);

    builder.Writeln("This paragraph is outside the editable range, and cannot be edited by anybody.");

    // Print details and contents of every editable range in the document.
    EditableRangePrinter editableRangePrinter = new EditableRangePrinter();

    doc.Accept(editableRangePrinter);

    Console.WriteLine(editableRangePrinter.ToText());
}

/// <summary>
/// Collects properties and contents of visited editable ranges in a string.
/// </summary>
public class EditableRangePrinter : DocumentVisitor
{
    public EditableRangePrinter()
    {
        mBuilder = new StringBuilder();
    }

    public string ToText()
    {
        return mBuilder.ToString();
    }

    public void Reset()
    {
        mBuilder.Clear();
        mInsideEditableRange = false;
    }

    /// <summary>
    /// Called when an EditableRangeStart node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitEditableRangeStart(EditableRangeStart editableRangeStart)
    {
        mBuilder.AppendLine(" -- Editable range found! -- ");
        mBuilder.AppendLine("\tID:\t\t" + editableRangeStart.Id);
        if (editableRangeStart.EditableRange.SingleUser == string.Empty)
            mBuilder.AppendLine("\tGroup:\t" + editableRangeStart.EditableRange.EditorGroup);
        else
            mBuilder.AppendLine("\tUser:\t" + editableRangeStart.EditableRange.SingleUser);
        mBuilder.AppendLine("\tContents:");

        mInsideEditableRange = true;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when an EditableRangeEnd node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitEditableRangeEnd(EditableRangeEnd editableRangeEnd)
    {
        mBuilder.AppendLine(" -- End of editable range --\n");

        mInsideEditableRange = false;

        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when a Run node is encountered in the document. This visitor only records runs that are inside editable ranges.
    /// </summary>
    public override VisitorAction VisitRun(Run run)
    {
        if (mInsideEditableRange) mBuilder.AppendLine("\t\"" + run.Text + "\"");

        return VisitorAction.Continue;
    }

    private bool mInsideEditableRange;
    private readonly StringBuilder mBuilder;
}

See Also

EditableRangeStart.NodeType