1 files changed, 52 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OpenId/OpenId/Extensions/UI/UIUtilities.cs b/src/DotNetOpenAuth.OpenId/OpenId/Extensions/UI/UIUtilities.cs
new file mode 100644
index 0000000..cee6882
--- /dev/null
+++ b/src/DotNetOpenAuth.OpenId/OpenId/Extensions/UI/UIUtilities.cs
@@ -0,0 +1,52 @@
+//-----------------------------------------------------------------------
+// <copyright file="UIUtilities.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OpenId.Extensions.UI {
+	using System;
+	using System.Diagnostics.Contracts;
+	using System.Globalization;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OpenId.RelyingParty;
+
+	/// <summary>
+	/// Constants used in implementing support for the UI extension.
+	/// </summary>
+	public static class UIUtilities {
+		/// <summary>
+		/// The required width of the popup window the relying party creates for the provider.
+		/// </summary>
+		public const int PopupWidth = 500; // UI extension calls for 450px, but Yahoo needs 500px
+
+		/// <summary>
+		/// The required height of the popup window the relying party creates for the provider.
+		/// </summary>
+		public const int PopupHeight = 500;
+
+		/// <summary>
+		/// Gets the <c>window.open</c> javascript snippet to use to open a popup window
+		/// compliant with the UI extension.
+		/// </summary>
+		/// <param name="relyingParty">The relying party.</param>
+		/// <param name="request">The authentication request to place in the window.</param>
+		/// <param name="windowName">The name to assign to the popup window.</param>
+		/// <returns>A string starting with 'window.open' and forming just that one method call.</returns>
+		internal static string GetWindowPopupScript(OpenIdRelyingParty relyingParty, IAuthenticationRequest request, string windowName) {
+			Contract.Requires<ArgumentNullException>(relyingParty != null);
+			Contract.Requires<ArgumentNullException>(request != null);
+			Contract.Requires<ArgumentException>(!string.IsNullOrEmpty(windowName));
+
+			Uri popupUrl = request.RedirectingResponse.GetDirectUriRequest(relyingParty.Channel);
+
+			return string.Format(
+				CultureInfo.InvariantCulture,
+				"(window.showModalDialog ? window.showModalDialog({0}, {1}, 'status:0;resizable:1;scroll:1;center:1;dialogWidth:{2}px; dialogHeight:{3}') : window.open({0}, {1}, 'status=0,toolbar=0,location=1,resizable=1,scrollbars=1,left=' + ((screen.width - {2}) / 2) + ',top=' + ((screen.height - {3}) / 2) + ',width={2},height={3}'));",
+				MessagingUtilities.GetSafeJavascriptValue(popupUrl.AbsoluteUri),
+				MessagingUtilities.GetSafeJavascriptValue(windowName),
+				PopupWidth,
+				PopupHeight);
+		}
+	}
+}