Merge eaf122d into fd87988

Author: SLT-World

CefSharp.Core.Runtime/Internals/CefSharpApp.h

@@ -209,10 +209,41 @@ namespace CefSharp
 
                         if (kvp->Key == "disable-features" || kvp->Key == "enable-features")
                         {
-                            //Temp workaround so we can set the disable-features/enable-features command line argument
-                            // See https://github.com/cefsharp/CefSharp/issues/2408
-                            commandLine->AppendSwitchWithValue(name, value);
+                            if (CefSharpSettings::MergeFeaturesCommandLineArgs)
+                            {
+                                CefString existingValue = commandLine->GetSwitchValue(name);
+                                if (existingValue.empty())
+                                {
+                                    commandLine->AppendSwitchWithValue(name, value);
+                                }
+                                else
+                                {
+                                    String^ currentValue = StringUtils::ToClr(existingValue);
+                                    bool missing = false;
+                                    for each(String ^ feature in kvp->Value->Split(','))
+                                    {
+                                        if (!currentValue->Contains(feature->Trim()))
+                                        {
+                                            missing = true;
+                                            break;
+                                        }
+                                    }
+                                    if (missing)
+                                    {
+                                        commandLine->RemoveSwitch(name);
+                                        commandLine->AppendSwitchWithValue(name, StringUtils::ToNative(currentValue + "," + kvp->Value));
+                                    }
+                                }
+                            }
+                            else
+                            {
+                                //Temp workaround so we can set the disable-features/enable-features command line argument
+                                // See https://github.com/cefsharp/CefSharp/issues/2408
+                                commandLine->RemoveSwitch(name);
+                                commandLine->AppendSwitchWithValue(name, value);
+                            }
                         }
+
                         // Right now the command line args handed to the application (global command line) have higher
                         // precedence than command line args provided by the app
                         else if (!commandLine->HasSwitch(name))

CefSharp/CefSharpSettings.cs

@@ -21,6 +21,7 @@ static CefSharpSettings()
             WcfTimeout = TimeSpan.FromSeconds(2);
 #endif
             SubprocessExitIfParentProcessClosed = true;
+            MergeFeaturesCommandLineArgs = true;
         }
 
 #if !NETCOREAPP
@@ -82,6 +83,12 @@ static CefSharpSettings()
         /// </summary>
         public static bool FocusedNodeChangedEnabled { get; set; }
 
+        /// <summary>
+        /// Any enable-features/disable-features command line arguments will be automatically merged with existing values if supplied.
+        /// This currently defaults to true.
+        /// </summary>
+        public static bool MergeFeaturesCommandLineArgs { get; set; }
+
         /// <summary>
         /// CefSharp.WinForms and CefSharp.Wpf.HwndHost ONLY!
         /// The default is to create <see cref="CefRuntimeStyle.Alloy"/>