add View.InDesignMode property

src/Caliburn.Micro.Platform/ActionMessage.cs

@@ -135,7 +135,7 @@ public AttachedCollection<Parameter> Parameters {
         /// </summary>
 #if WinRT81
         protected override void OnAttached() {
-            if (!Caliburn.Micro.Execute.InDesignMode) {
+            if (!View.InDesignMode) {
                 Parameters.Attach(AssociatedObject);
                 Parameters.OfType<Parameter>().Apply(x => x.MakeAwareOf(this));
 
@@ -160,7 +160,7 @@ void ElementUnloaded(object sender, RoutedEventArgs e)
         }
 #else
         protected override void OnAttached() {
-            if (!Execute.InDesignMode) {
+            if (!View.InDesignMode) {
                 Parameters.Attach(AssociatedObject);
                 Parameters.Apply(x => x.MakeAwareOf(this));
 
@@ -184,7 +184,7 @@ static void HandlerPropertyChanged(DependencyObject d, DependencyPropertyChanged
         /// Called when the action is being detached from its AssociatedObject, but before it has actually occurred.
         /// </summary>
         protected override void OnDetaching() {
-            if (!Caliburn.Micro.Execute.InDesignMode) {
+            if (!View.InDesignMode) {
                 Detaching(this, EventArgs.Empty);
                 AssociatedObject.Loaded -= ElementLoaded;
                 Parameters.Detach();

src/Caliburn.Micro.Platform/Bind.cs

@@ -78,7 +78,7 @@ public static void SetModel(DependencyObject dependencyObject, object value) {
         }
 
         static void ModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
-            if (Execute.InDesignMode || e.NewValue == null || e.NewValue == e.OldValue) {
+            if (View.InDesignMode || e.NewValue == null || e.NewValue == e.OldValue) {
                 return;
             }
 
@@ -105,7 +105,7 @@ static void ModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs
         }
 
         static void ModelWithoutContextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
-            if (Execute.InDesignMode || e.NewValue == null || e.NewValue == e.OldValue) {
+            if (View.InDesignMode || e.NewValue == null || e.NewValue == e.OldValue) {
                 return;
             }
 
@@ -165,7 +165,7 @@ public static void SetAtDesignTime(DependencyObject dependencyObject, bool value
         }
 
         static void AtDesignTimeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
-            if (!Execute.InDesignMode)
+            if (!View.InDesignMode)
                 return;
 
             var atDesignTime = (bool) e.NewValue;
@@ -184,7 +184,7 @@ static void AtDesignTimeChanged(DependencyObject d, DependencyPropertyChangedEve
                 );
 
         static void DataContextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
-            if (!Execute.InDesignMode)
+            if (!View.InDesignMode)
                 return;
 
             var enable = d.GetValue(AtDesignTimeProperty);

src/Caliburn.Micro.Platform/View.cs

@@ -3,11 +3,13 @@
     using System.Linq;
 #if WinRT
     using System.Reflection;
+    using Windows.ApplicationModel;
     using Windows.UI.Xaml;
     using Windows.UI.Xaml.Controls;
     using Windows.UI.Xaml.Markup;
     using Windows.UI.Xaml.Media;
 #else
+    using System.ComponentModel;
     using System.Windows;
     using System.Windows.Controls;
     using System.Windows.Markup;
@@ -358,5 +360,30 @@ static void SetContentPropertyCore(object targetLocation, object view) {
             }
         }
 #endif
+
+        private static bool? inDesignMode;
+
+        /// <summary>
+        /// Gets a value that indicates whether the process is running in design mode.
+        /// </summary>
+        public static bool InDesignMode
+        {
+            get
+            {
+                if (inDesignMode == null)
+                {
+#if WinRT
+                    inDesignMode = DesignMode.DesignModeEnabled;
+#elif SILVERLIGHT
+                    inDesignMode = DesignerProperties.IsInDesignTool;
+#else
+                    var descriptor = DependencyPropertyDescriptor.FromProperty(DesignerProperties.IsInDesignModeProperty, typeof(FrameworkElement));
+                    inDesignMode = (bool)descriptor.Metadata.DefaultValue;
+#endif
+                }
+
+                return inDesignMode.GetValueOrDefault(false);
+            }
+        }
     }
 }

src/Caliburn.Micro.Platform/ViewLocator.cs

@@ -336,7 +336,7 @@ public static void AddSubNamespaceMapping(string nsSource, string nsTarget, stri
         public static Func<Type, DependencyObject, object, Type> LocateTypeForModelType = (modelType, displayLocation, context) => {
             var viewTypeName = modelType.FullName;
 
-            if (Execute.InDesignMode) {
+            if (View.InDesignMode) {
                 viewTypeName = ModifyModelTypeAtDesignTime(viewTypeName);
             }
 

src/Caliburn.Micro.Platform/ViewModelBinder.cs

@@ -181,7 +181,7 @@ public static bool ShouldApplyConventions(FrameworkElement view) {
 #if !WinRT
             // when using d:DesignInstance, Blend tries to assign the DesignInstanceExtension class as the DataContext,
             // so here we get the actual ViewModel which is in the Instance property of DesignInstanceExtension
-            if (Execute.InDesignMode) {
+            if (View.InDesignMode) {
                 var vmType = viewModel.GetType();
                 if (vmType.FullName == "Microsoft.Expression.DesignModel.InstanceBuilders.DesignInstanceExtension") {
                     var propInfo = vmType.GetProperty("Instance", BindingFlags.Instance | BindingFlags.NonPublic);

src/Caliburn.Micro.Platform/XamlPlatformProvider.cs

@@ -1,23 +1,20 @@
 namespace Caliburn.Micro {
     using System;
     using System.Collections.Generic;
-    using System.ComponentModel;
     using System.Threading.Tasks;
-    using System.Windows;
 #if WinRT
     using System.Reflection;
-    using Windows.ApplicationModel;
     using Windows.UI.Core;
     using Windows.UI.Xaml;
 #else
+    using System.Windows;
     using System.Windows.Threading;
 #endif
 
     /// <summary>
     /// A <see cref="IPlatformProvider"/> implementation for the XAML platfrom.
     /// </summary>
     public class XamlPlatformProvider : IPlatformProvider {
-        private bool? inDesignMode;
 #if WinRT
         private CoreDispatcher dispatcher;
 #else
@@ -41,20 +38,7 @@ public XamlPlatformProvider() {
         /// Indicates whether or not the framework is in design-time mode.
         /// </summary>
         public bool InDesignMode {
-            get {
-                if (inDesignMode == null) {
-#if WinRT
-                    inDesignMode = DesignMode.DesignModeEnabled;
-#elif SILVERLIGHT
-                    inDesignMode = DesignerProperties.IsInDesignTool;
-#else
-                    var descriptor = DependencyPropertyDescriptor.FromProperty(DesignerProperties.IsInDesignModeProperty, typeof (FrameworkElement));
-                    inDesignMode = (bool)descriptor.Metadata.DefaultValue;
-#endif
-                }
-
-                return inDesignMode.GetValueOrDefault(false);
-            }
+            get { return View.InDesignMode; }
         }
 
         private void ValidateDispatcher() {