Added logger box to the Offline Provider app.

1 files changed, 87 insertions, 0 deletions

diff --git a/samples/OpenIdOfflineProvider/TextBoxTextWriter.cs b/samples/OpenIdOfflineProvider/TextBoxTextWriter.cs
new file mode 100644
index 0000000..8118986
--- /dev/null
+++ b/samples/OpenIdOfflineProvider/TextBoxTextWriter.cs
@@ -0,0 +1,87 @@
+//-----------------------------------------------------------------------
+// <copyright file="TextBoxTextWriter.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OpenIdOfflineProvider {
+	using System;
+	using System.Diagnostics.Contracts;
+	using System.IO;
+	using System.Text;
+	using System.Windows.Controls;
+
+	/// <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) {
+			Contract.Requires(box != null);
+			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>
+		/// Verifies conditions that should be true for any valid state of this object.
+		/// </summary>
+		[ContractInvariantMethod]
+		protected void ObjectInvariant() {
+			Contract.Invariant(this.Box != null);
+		}
+
+		/// <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();
+		}
+	}
+}