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//-----------------------------------------------------------------------
// <copyright file="TextBoxTextWriter.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OpenIdOfflineProvider {
using System;
using System.IO;
using System.Text;
using System.Windows.Controls;
using Validation;
/// <summary>
/// A text writer that appends all write calls to a text box.
/// </summary>
internal class TextBoxTextWriter : TextWriter {
/// <summary>
/// Initializes a new instance of the <see cref="TextBoxTextWriter"/> class.
/// </summary>
/// <param name="box">The text box to append log messages to.</param>
internal TextBoxTextWriter(TextBox box) {
Requires.NotNull(box, "box");
this.Box = box;
}
/// <summary>
/// Gets the <see cref="T:System.Text.Encoding"/> in which the output is written.
/// </summary>
/// <returns>
/// The Encoding in which the output is written.
/// </returns>
public override Encoding Encoding {
get { return Encoding.Unicode; }
}
/// <summary>
/// Gets the box to append to.
/// </summary>
internal TextBox Box { get; private set; }
/// <summary>
/// Writes a character to the text stream.
/// </summary>
/// <param name="value">The character to write to the text stream.</param>
/// <exception cref="T:System.ObjectDisposedException">
/// The <see cref="T:System.IO.TextWriter"/> is closed.
/// </exception>
/// <exception cref="T:System.IO.IOException">
/// An I/O error occurs.
/// </exception>
public override void Write(char value) {
this.Box.Dispatcher.BeginInvoke((Action<string>)this.AppendText, value.ToString());
}
/// <summary>
/// Writes a string to the text stream.
/// </summary>
/// <param name="value">The string to write.</param>
/// <exception cref="T:System.ObjectDisposedException">
/// The <see cref="T:System.IO.TextWriter"/> is closed.
/// </exception>
/// <exception cref="T:System.IO.IOException">
/// An I/O error occurs.
/// </exception>
public override void Write(string value) {
this.Box.Dispatcher.BeginInvoke((Action<string>)this.AppendText, value);
}
/// <summary>
/// Appends text to the text box.
/// </summary>
/// <param name="value">The string to append.</param>
private void AppendText(string value) {
this.Box.AppendText(value);
this.Box.ScrollToEnd();
}
}
}
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