Add class to detect whether we're in various runtime environments

Splat/ModeDetector.cs

@@ -0,0 +1,72 @@
+using System;
+
+namespace Splat
+{
+    public interface IModeDetector
+    {
+        bool? InUnitTestRunner();
+        bool? InDesignMode();
+    }
+
+    public static class ModeDetector
+    {
+        static IModeDetector current { get; set; }
+
+        public static void OverrideModeDetector(IModeDetector modeDetector)
+        {
+            current = modeDetector;
+        }
+
+        public static bool InUnitTestRunner() 
+        {
+            var ret = default(bool?);
+
+            if (current != null) {
+                ret = current.InUnitTestRunner();
+                if (ret != null) return ret.Value;
+            }
+
+            // We have no sane platform-independent way to detect a unit test 
+            // runner :-/
+            return false;
+        }
+                
+        static bool? cachedInDesignModeResult;
+        public static bool InDesignMode()
+        {
+            var ret = default(bool?);
+
+            if (current != null) {
+                ret = current.InDesignMode();
+                if (ret != null) return ret.Value;
+            }
+
+            if (cachedInDesignModeResult != null) return cachedInDesignModeResult.Value;
+
+            // Check Silverlight / WP8 Design Mode
+            var type = Type.GetType("System.ComponentModel.DesignerProperties, System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e", false);
+            if (type != null) {
+                var mInfo = type.GetMethod("GetIsInDesignMode");
+                var dependencyObject = Type.GetType("System.Windows.Controls.Border, System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e", false);
+
+                if (dependencyObject != null) {
+                    cachedInDesignModeResult = (bool)mInfo.Invoke(null, new object[] { Activator.CreateInstance(dependencyObject) });
+                }
+            } else if((type = Type.GetType("System.ComponentModel.DesignerProperties, PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35", false)) != null) {
+                // loaded the assembly, could be .net 
+                var mInfo = type.GetMethod("GetIsInDesignMode");
+                Type dependencyObject = Type.GetType("System.Windows.DependencyObject, WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35", false);
+                if (dependencyObject != null) {
+                    cachedInDesignModeResult = (bool)mInfo.Invoke(null, new object[] { Activator.CreateInstance(dependencyObject) });
+                }
+            } else if ((type = Type.GetType("Windows.ApplicationModel.DesignMode, Windows, ContentType=WindowsRuntime", false)) != null) {
+                // check WinRT next
+                cachedInDesignModeResult = (bool)type.GetProperty("DesignModeEnabled").GetMethod.Invoke(null, null);
+            } else {
+                cachedInDesignModeResult = false;
+            }
+
+            return cachedInDesignModeResult.GetValueOrDefault();
+        }
+    }
+}

Splat/Resources/Resource.designer.cs

@@ -9,9 +9,9 @@
 //  </autogenerated>
 // ------------------------------------------------------------------------------
 
-[assembly: Android.Runtime.ResourceDesignerAttribute("Splatmonodroid.Resource", IsApplication=false)]
+[assembly: Android.Runtime.ResourceDesignerAttribute("Splat.Resource", IsApplication=false)]
 
-namespace Splatmonodroid
+namespace Splat
 {
 	
 	

Splat/Splat-monoandroid.csproj

@@ -44,6 +44,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Resources\Resource.designer.cs" />
+    <Compile Include="ModeDetector.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Resources\AboutResources.txt" />

Splat/Splat-monotouch.csproj

@@ -40,4 +40,7 @@
     <Folder Include="Resources\" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
-</Project>
+  <ItemGroup>
+    <Compile Include="ModeDetector.cs" />
+  </ItemGroup>
+</Project>