Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.ComponentModel/AuthoringOM/Design/ExtenderHelpers.cs

@@ -0,0 +1,62 @@
+#pragma warning disable 1634, 1691
+namespace System.Workflow.ComponentModel.Design
+{
+    using System;
+    using System.IO;
+    using System.Drawing;
+    using System.CodeDom;
+    using System.Diagnostics;
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.Windows.Forms;
+    using System.ComponentModel;
+    using System.Globalization;
+    using System.Drawing.Design;
+    using System.Drawing.Imaging;
+    using System.Drawing.Drawing2D;
+    using System.Windows.Forms.Design;
+    using System.ComponentModel.Design;
+    using System.Collections.Specialized;
+    using System.ComponentModel.Design.Serialization;
+    using System.Workflow.ComponentModel.Compiler;
+    using System.Workflow.ComponentModel.Serialization;
+    using System.Collections.ObjectModel;
+    using System.Reflection;
+    using System.Workflow.ComponentModel.Design;
+    using System.Runtime.Serialization.Formatters.Binary;
+
+    //
+
+    #region Class ExtenderHelpers
+    internal static class ExtenderHelpers
+    {
+        internal static void FilterDependencyProperties(IServiceProvider serviceProvider, Activity activity)
+        {
+            IExtenderListService extenderListService = serviceProvider.GetService(typeof(IExtenderListService)) as IExtenderListService;
+            if (extenderListService != null)
+            {
+                Dictionary<string, DependencyProperty> dependencyProperyies = new Dictionary<string, DependencyProperty>();
+                foreach (DependencyProperty property in activity.MetaDependencyProperties)
+                    dependencyProperyies.Add(property.Name, property);
+
+                List<string> disallowedProperties = new List<string>();
+                foreach (IExtenderProvider extenderProvider in extenderListService.GetExtenderProviders())
+                {
+                    if (!extenderProvider.CanExtend(activity))
+                    {
+                        ProvidePropertyAttribute[] propertyAttributes = extenderProvider.GetType().GetCustomAttributes(typeof(ProvidePropertyAttribute), true) as ProvidePropertyAttribute[];
+                        foreach (ProvidePropertyAttribute propertyAttribute in propertyAttributes)
+                            disallowedProperties.Add(propertyAttribute.PropertyName);
+                    }
+                }
+
+                foreach (string propertyName in disallowedProperties)
+                {
+                    if (dependencyProperyies.ContainsKey(propertyName))
+                        activity.RemoveProperty(dependencyProperyies[propertyName]);
+                }
+            }
+        }
+    }
+    #endregion
+}