Fixing #237 - Adding a configurable option - UseOnlyCefMessageLoop.

Author: mattkol

src/Chromely.CefSharp/NativeHost/WinBase/NativeHostBase.cs

@@ -9,6 +9,7 @@
 using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
+using CefSharp;
 using Chromely.Core.Configuration;
 using Chromely.Core.Host;
 using Chromely.Core.Logging;
@@ -127,7 +128,23 @@ public virtual IntPtr GetNativeHandle()
 
         public virtual void Run()
         {
-            RunMessageLoopInternal();
+            try
+            {
+                if (_options.UseOnlyCefMessageLoop)
+                {
+                    Cef.RunMessageLoop();
+                    Cef.Shutdown();
+                }
+                else
+                {
+                    RunMessageLoopInternal();
+                }
+            }
+            catch (Exception exception)
+            {
+                Logger.Instance.Log.LogError("Error in NativeHostBase::Run");
+                Logger.Instance.Log.LogError(exception, exception.Message);
+            }
         }
 
         public virtual Size GetWindowClientSize()
@@ -529,6 +546,11 @@ protected virtual IntPtr WndProc(IntPtr hWnd, uint message, IntPtr wParam, IntPt
 
                 case WM.DESTROY:
                     {
+                        if (_options.UseOnlyCefMessageLoop)
+                        {
+                            Cef.QuitMessageLoop();
+                        }
+
                         PostQuitMessage(0);
                         break;
                     }

src/Chromely.CefSharp/WindowController.Run.cs

@@ -63,7 +63,7 @@ protected int RunInternal(string[] args)
                 LocalesDirPath = localesDirPath,
                 Locale = "en-US",
                 RemoteDebuggingPort = 20480,
-                MultiThreadedMessageLoop = true,
+                MultiThreadedMessageLoop = !_config.WindowOptions.UseOnlyCefMessageLoop,
                 CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache"),
                 LogSeverity = LogSeverity.Default,
                 LogFile = "logs\\chromely.cef_" + DateTime.Now.ToString("yyyyMMdd") + ".log",
@@ -74,6 +74,10 @@ protected int RunInternal(string[] args)
             _settings.UpdateCommandOptions(_config.CommandLineOptions);
             _settings.UpdateCommandLineArgs(_config.CommandLineArgs);
 
+            // If MultiThreadedMessageLoop is overriden in Setting using CustomSettings, then
+            // It is assumed that the developer way not be aware of IWindowOptions - UseOnlyCefMessageLoop
+            _config.WindowOptions.UseOnlyCefMessageLoop = !_settings.MultiThreadedMessageLoop;
+
             // Set DevTools url
             string devtoolsUrl = _config.DevToolsUrl;
             if (string.IsNullOrWhiteSpace(devtoolsUrl))