In Core/src/MonoDevelop.Ide:

	* MonoDevelop.Ide.Gui/HelpOperations.cs (CheckExternalMonodoc): New. Check
	whether the available monodoc is recent version (supports --remote-mode).
	This check is done on the first call to ShowHelp. If its unsuccesful,
	then it falls back to use the integrated HelpViewer.
	(ShowHelpExternal): New. Show help using the external monodoc. Fall back
	on HelpViewer in case of any errors.

In Core/src/MonoDevelop.Core:

	* MonoDevelop.Core.Execution/ProcessService.cs (StartProcess): Add a new
	overload with 'redirectStandardInput' param.

svn path=/trunk/monodevelop/; revision=69775

2 files changed, 96 insertions, 0 deletions

diff --git a/Core/src/MonoDevelop.Ide/ChangeLog b/Core/src/MonoDevelop.Ide/ChangeLog
index 6d1ba26585..683143d398 100644
--- a/Core/src/MonoDevelop.Ide/ChangeLog
+++ b/Core/src/MonoDevelop.Ide/ChangeLog
@@ -1,3 +1,12 @@
+2006-12-20  Ankit Jain  <jankit@novell.com>
+
+	* MonoDevelop.Ide.Gui/HelpOperations.cs (CheckExternalMonodoc): New. Check
+	whether the available monodoc is recent version (supports --remote-mode).
+	This check is done on the first call to ShowHelp. If its unsuccesful,
+	then it falls back to use the integrated HelpViewer.
+	(ShowHelpExternal): New. Show help using the external monodoc. Fall back
+	on HelpViewer in case of any errors.
+
 2006-12-17 Jacob Ilsø Christensen <jacobilsoe@gmail.com>
 
 	* options/MonoDevelop-templates.xml: Use standard keywords
diff --git a/Core/src/MonoDevelop.Ide/MonoDevelop.Ide.Gui/HelpOperations.cs b/Core/src/MonoDevelop.Ide/MonoDevelop.Ide.Gui/HelpOperations.cs
index 81bc42651a..c85e36f8c7 100644
--- a/Core/src/MonoDevelop.Ide/MonoDevelop.Ide.Gui/HelpOperations.cs
+++ b/Core/src/MonoDevelop.Ide/MonoDevelop.Ide.Gui/HelpOperations.cs
@@ -30,6 +30,9 @@
 using System;
 using System.Collections;
 using Monodoc;
+using MonoDevelop.Core.Execution;
+using System.IO;
+using MonoDevelop.Core;
 using MonoDevelop.Core.Gui;
 
 namespace MonoDevelop.Ide.Gui
@@ -37,9 +40,93 @@ namespace MonoDevelop.Ide.Gui
 	public class HelpOperations
 	{
 		HelpViewer helpViewer;
+		ProcessWrapper pw;
+		TextWriter outWriter;
+		TextWriter errWriter;
+		bool firstCall = true;
+		bool useExternalMonodoc = false;
 
 		public void ShowHelp (string topic)
 		{
+			if (topic == null || topic.Trim ().Length == 0)
+				return;
+	
+			if (firstCall)
+				CheckExternalMonodoc ();
+
+			if (useExternalMonodoc)
+				ShowHelpExternal (topic);
+			else
+				ShowHelpIntegrated (topic);
+		}
+
+		void CheckExternalMonodoc ()
+		{
+			firstCall = false;
+			try {
+				outWriter = new StringWriter ();
+				errWriter = new StringWriter ();
+				pw = Runtime.ProcessService.StartProcess (
+					"monodoc", "--help", "", outWriter, errWriter, 
+					delegate { 
+						if (pw.ExitCode != 0) 
+							IdeApp.Services.MessageService.ShowError (
+								String.Format (
+								"MonoDoc exited with a exit code = {0}. Error : {1}", 
+								pw.ExitCode, errWriter.ToString ()));
+						pw = null;
+					}, true);
+
+				pw.WaitForOutput ();
+				if (outWriter.ToString ().IndexOf ("--about") > 0)
+					useExternalMonodoc = true;
+				pw = null;
+			} catch (Exception e) {
+				IdeApp.Services.MessageService.ShowError (String.Format (
+					"Could not start monodoc : {0}", e.ToString ()));
+			}
+
+			if (!useExternalMonodoc)
+				IdeApp.Services.MessageService.ShowError (
+					"You need a newer monodoc to use it externally from monodevelop. Using the integrated help viewer now.");
+		}
+
+		void ShowHelpExternal (string topic)
+		{
+			try {
+				if (pw == null || pw.HasExited == true) {
+					outWriter = new StringWriter ();
+					errWriter = new StringWriter ();
+					pw = Runtime.ProcessService.StartProcess (
+						"monodoc", "--remote-mode", "", outWriter, errWriter, 
+						delegate { 
+							if (pw.ExitCode == 0)
+								return;
+
+							IdeApp.Services.MessageService.ShowError (
+								String.Format (
+								"MonoDoc exited with a exit code = {0}. Integrated help viewer will be used now.\nError : {1}", 
+								pw.ExitCode, errWriter.ToString ()));
+
+							pw = null;
+							useExternalMonodoc = false;
+							Gtk.Application.Invoke (delegate { ShowHelpIntegrated (topic); });
+						}, true);
+				}
+
+				if (pw != null && !pw.HasExited) {
+					pw.StandardInput.WriteLine (topic);
+					Console.WriteLine (outWriter.ToString ());
+					Console.WriteLine (errWriter.ToString ());
+				}
+			} catch (Exception e) {
+				IdeApp.Services.MessageService.ShowError (e);
+				useExternalMonodoc = false;
+			}
+		}
+
+ 		void ShowHelpIntegrated (string topic)
+ 		{
 			if (helpViewer == null) {
 				helpViewer = new HelpViewer ();
 				helpViewer.LoadUrl (topic);