From fee2a4dd99c03a39ed1074fb1502961e1c850621 Mon Sep 17 00:00:00 2001
From: Ben Wallis <atomyc+github@gmail.com>
Date: Sat, 17 Jun 2017 13:50:44 +0100
Subject: [PATCH] Initial refactoring to support CommandManager

---
 .../Services/TestItemFilterProcessor.cs       |  14 +-
 .../Commands/CommandManager.cs                |  62 ++++
 Filtration.ObjectModel/Commands/ICommand.cs   |   7 +
 .../Commands/IUndoableCommand.cs              |   8 +
 .../Factories/IItemFilterScriptFactory.cs     |   9 +
 .../Filtration.ObjectModel.csproj             |  16 +
 Filtration.ObjectModel/ItemFilterScript.cs    |  54 +++-
 .../Properties/Annotations.cs                 | 295 ++++++++++++------
 .../Properties/AssemblyInfo.cs                |   7 +
 .../WindsorInstallers/CommandsInstaller.cs    |  21 ++
 .../WindsorInstallers/ModelsInstaller.cs      |  23 ++
 Filtration.ObjectModel/packages.config        |   5 +
 .../Services/IItemFilterScriptTranslator.cs   |   4 +-
 .../TestItemFilterScriptTranslator.cs         | 107 +++----
 .../Services/ItemFilterScriptTranslator.cs    |  16 +-
 .../TestItemFilterScriptRepository.cs         |  27 +-
 .../Providers/ThemeProvider.cs                |   8 +-
 .../Services/ThemeService.cs                  |   4 +-
 .../ViewModels/ThemeEditorViewModel.cs        |   8 +-
 Filtration.sln.DotSettings                    |   1 +
 .../ItemFilterScriptRepository.cs             |   6 +-
 .../Services/ItemFilterPersistenceService.cs  |  10 +-
 .../ViewModels/ItemFilterScriptViewModel.cs   |   8 +-
 .../ViewModels/ReplaceColorsViewModel.cs      |  23 +-
 Filtration/Views/ItemFilterScriptView.xaml    |   5 +-
 Filtration/Views/StartPageView.xaml           |   2 +-
 26 files changed, 549 insertions(+), 201 deletions(-)
 create mode 100644 Filtration.ObjectModel/Commands/CommandManager.cs
 create mode 100644 Filtration.ObjectModel/Commands/ICommand.cs
 create mode 100644 Filtration.ObjectModel/Commands/IUndoableCommand.cs
 create mode 100644 Filtration.ObjectModel/Factories/IItemFilterScriptFactory.cs
 create mode 100644 Filtration.ObjectModel/WindsorInstallers/CommandsInstaller.cs
 create mode 100644 Filtration.ObjectModel/WindsorInstallers/ModelsInstaller.cs
 create mode 100644 Filtration.ObjectModel/packages.config

diff --git a/Filtration.ItemFilterPreview.Tests/Services/TestItemFilterProcessor.cs b/Filtration.ItemFilterPreview.Tests/Services/TestItemFilterProcessor.cs
index 17274f8..2a20555 100644
--- a/Filtration.ItemFilterPreview.Tests/Services/TestItemFilterProcessor.cs
+++ b/Filtration.ItemFilterPreview.Tests/Services/TestItemFilterProcessor.cs
@@ -6,6 +6,7 @@ using Filtration.ItemFilterPreview.Tests.Properties;
 using Filtration.ObjectModel;
 using Filtration.ObjectModel.BlockItemTypes;
 using Filtration.ObjectModel.Enums;
+using Filtration.ObjectModel.Factories;
 using Filtration.Parser.Services;
 using Moq;
 using NUnit.Framework;
@@ -71,7 +72,12 @@ namespace Filtration.ItemFilterPreview.Tests.Services
             //Arrange
             var testInputScriptFile = Resources.MuldiniFilterScript;
             var blockGroupHierarchyBuilder = new BlockGroupHierarchyBuilder();
-            var scriptTranslator = new ItemFilterScriptTranslator(new ItemFilterBlockTranslator(blockGroupHierarchyBuilder), blockGroupHierarchyBuilder);
+            var mockItemFilterScriptFactory = new Mock<IItemFilterScriptFactory>();
+            mockItemFilterScriptFactory
+                .Setup(i => i.Create())
+                .Returns(new ItemFilterScript());
+
+            var scriptTranslator = new ItemFilterScriptTranslator(blockGroupHierarchyBuilder, new ItemFilterBlockTranslator(blockGroupHierarchyBuilder), mockItemFilterScriptFactory.Object);
             var script = scriptTranslator.TranslateStringToItemFilterScript(testInputScriptFile);
 
             var testInputItem = new Item
@@ -101,7 +107,11 @@ namespace Filtration.ItemFilterPreview.Tests.Services
             //Arrange
             var testInputScriptFile = Resources.MuldiniFilterScript;
             var blockGroupHierarchyBuilder = new BlockGroupHierarchyBuilder();
-            var scriptTranslator = new ItemFilterScriptTranslator(new ItemFilterBlockTranslator(blockGroupHierarchyBuilder), blockGroupHierarchyBuilder);
+            var mockItemFilterScriptFactory = new Mock<IItemFilterScriptFactory>();
+            mockItemFilterScriptFactory
+                .Setup(i => i.Create())
+                .Returns(new ItemFilterScript());
+            var scriptTranslator = new ItemFilterScriptTranslator(blockGroupHierarchyBuilder, new ItemFilterBlockTranslator(blockGroupHierarchyBuilder), mockItemFilterScriptFactory.Object);
             var script = scriptTranslator.TranslateStringToItemFilterScript(testInputScriptFile);
 
             var testInputItems = new List<IItem>
diff --git a/Filtration.ObjectModel/Commands/CommandManager.cs b/Filtration.ObjectModel/Commands/CommandManager.cs
new file mode 100644
index 0000000..e8dc6f7
--- /dev/null
+++ b/Filtration.ObjectModel/Commands/CommandManager.cs
@@ -0,0 +1,62 @@
+using System.Collections.Generic;
+
+namespace Filtration.ObjectModel.Commands
+{
+    public interface ICommandManager
+    {
+        void ExecuteCommand(ICommand command);
+        void Undo(int undoLevels = 1);
+        void Redo(int redoLevels = 1);
+    }
+
+    public interface ICommandManagerInternal : ICommandManager
+    {
+        void SetScript(IItemFilterScriptInternal layout);
+    }
+
+    internal class CommandManager : ICommandManagerInternal
+    {
+        private readonly Stack<IUndoableCommand> _undoCommandStack = new Stack<IUndoableCommand>();
+        private readonly Stack<IUndoableCommand> _redoCommandStack = new Stack<IUndoableCommand>();
+        private IItemFilterScriptInternal _itemFilterScript;
+
+        public void SetScript(IItemFilterScriptInternal itemFilterScript)
+        {
+            _itemFilterScript = itemFilterScript;
+        }
+
+        public void ExecuteCommand(ICommand command)
+        {
+            command.Execute();
+            var undoableCommand = command as IUndoableCommand;
+            if (undoableCommand != null)
+            {
+                _undoCommandStack.Push(undoableCommand);
+                _redoCommandStack.Clear();
+            }
+            _itemFilterScript.SetIsDirty(true);
+        }
+
+        public void Undo(int undoLevels = 1)
+        {
+            for (var index = undoLevels; _undoCommandStack.Count > 0 && index > 0; --index)
+            {
+                var undoableCommand = _undoCommandStack.Pop();
+                undoableCommand.Undo();
+                _redoCommandStack.Push(undoableCommand);
+            }
+            _itemFilterScript.SetIsDirty(true);
+        }
+
+        public void Redo(int redoLevels = 1)
+        {
+            for (int index = redoLevels; _redoCommandStack.Count > 0 && index > 0; --index)
+            {
+                var undoableCommand = _redoCommandStack.Pop();
+                undoableCommand.Redo();
+                _undoCommandStack.Push(undoableCommand);
+            }
+            _itemFilterScript.SetIsDirty(true);
+        }
+    }
+}
diff --git a/Filtration.ObjectModel/Commands/ICommand.cs b/Filtration.ObjectModel/Commands/ICommand.cs
new file mode 100644
index 0000000..84cfe3c
--- /dev/null
+++ b/Filtration.ObjectModel/Commands/ICommand.cs
@@ -0,0 +1,7 @@
+namespace Filtration.ObjectModel.Commands
+{
+    public interface ICommand
+    {
+        void Execute();
+    }
+}
diff --git a/Filtration.ObjectModel/Commands/IUndoableCommand.cs b/Filtration.ObjectModel/Commands/IUndoableCommand.cs
new file mode 100644
index 0000000..9a9eb76
--- /dev/null
+++ b/Filtration.ObjectModel/Commands/IUndoableCommand.cs
@@ -0,0 +1,8 @@
+namespace Filtration.ObjectModel.Commands
+{
+    internal interface IUndoableCommand : ICommand
+    {
+        void Undo();
+        void Redo();
+    }
+}
diff --git a/Filtration.ObjectModel/Factories/IItemFilterScriptFactory.cs b/Filtration.ObjectModel/Factories/IItemFilterScriptFactory.cs
new file mode 100644
index 0000000..2a5c0b2
--- /dev/null
+++ b/Filtration.ObjectModel/Factories/IItemFilterScriptFactory.cs
@@ -0,0 +1,9 @@
+namespace Filtration.ObjectModel.Factories
+{
+    public interface IItemFilterScriptFactory
+    {
+        IItemFilterScript Create();
+
+        void Release(IItemFilterScript itemFilterScript);
+    }
+}
diff --git a/Filtration.ObjectModel/Filtration.ObjectModel.csproj b/Filtration.ObjectModel/Filtration.ObjectModel.csproj
index 23e9171..17c34c7 100644
--- a/Filtration.ObjectModel/Filtration.ObjectModel.csproj
+++ b/Filtration.ObjectModel/Filtration.ObjectModel.csproj
@@ -31,6 +31,12 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Castle.Core, Version=3.3.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc, processorArchitecture=MSIL">
+      <HintPath>..\packages\Castle.Core.3.3.0\lib\net45\Castle.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Castle.Windsor, Version=3.4.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc, processorArchitecture=MSIL">
+      <HintPath>..\packages\Castle.Windsor.3.4.0\lib\net45\Castle.Windsor.dll</HintPath>
+    </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="System" />
     <Reference Include="System.ComponentModel.DataAnnotations" />
@@ -68,6 +74,9 @@
     <Compile Include="BlockItemTypes\SoundBlockItem.cs" />
     <Compile Include="BlockItemTypes\TextColorBlockItem.cs" />
     <Compile Include="BlockItemTypes\WidthBlockItem.cs" />
+    <Compile Include="Commands\CommandManager.cs" />
+    <Compile Include="Commands\ICommand.cs" />
+    <Compile Include="Commands\IUndoableCommand.cs" />
     <Compile Include="Enums\BlockAction.cs" />
     <Compile Include="Enums\BlockItemType.cs" />
     <Compile Include="Enums\FilterPredicateOperator.cs" />
@@ -77,6 +86,7 @@
     <Compile Include="Enums\ThemeComponentType.cs" />
     <Compile Include="Extensions\EnumHelper.cs" />
     <Compile Include="Extensions\ItemRarityExtensions.cs" />
+    <Compile Include="Factories\IItemFilterScriptFactory.cs" />
     <Compile Include="FilteredItem.cs" />
     <Compile Include="IAudioVisualBlockItem.cs" />
     <Compile Include="IItemFilterBlockItem.cs" />
@@ -97,6 +107,12 @@
     <Compile Include="ThemeEditor\Theme.cs" />
     <Compile Include="ThemeEditor\ThemeComponent.cs" />
     <Compile Include="ThemeEditor\ThemeComponentCollection.cs" />
+    <Compile Include="WindsorInstallers\CommandsInstaller.cs" />
+    <Compile Include="WindsorInstallers\ModelsInstaller.cs" />
+  </ItemGroup>
+  <ItemGroup />
+  <ItemGroup>
+    <None Include="packages.config" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/Filtration.ObjectModel/ItemFilterScript.cs b/Filtration.ObjectModel/ItemFilterScript.cs
index 4938800..9548e51 100644
--- a/Filtration.ObjectModel/ItemFilterScript.cs
+++ b/Filtration.ObjectModel/ItemFilterScript.cs
@@ -1,39 +1,62 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.ComponentModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
+using Filtration.ObjectModel.Annotations;
 using Filtration.ObjectModel.BlockItemTypes;
+using Filtration.ObjectModel.Commands;
 using Filtration.ObjectModel.ThemeEditor;
 
 namespace Filtration.ObjectModel
 {
-    public interface IItemFilterScript
+    public interface IItemFilterScript : INotifyPropertyChanged
     {
+        ICommandManager CommandManager { get; }
+
         ObservableCollection<IItemFilterBlockBase> ItemFilterBlocks { get; }
         ObservableCollection<ItemFilterBlockGroup> ItemFilterBlockGroups { get; }
         ThemeComponentCollection ThemeComponents { get; set; }
         string FilePath { get; set; }
         string Description { get; set; }
         DateTime DateModified { get; set; }
+        bool IsDirty { get; }
+
         IItemFilterScriptSettings ItemFilterScriptSettings { get; }
 
         List<string> Validate();
         void ReplaceColors(ReplaceColorsParameterSet replaceColorsParameterSet);
     }
 
-    public class ItemFilterScript : IItemFilterScript
+    public interface IItemFilterScriptInternal : IItemFilterScript
     {
-        public ItemFilterScript()
+        void SetIsDirty(bool isDirty);
+    }
+
+    public class ItemFilterScript : IItemFilterScriptInternal
+    {
+        private bool _isDirty;
+
+        internal ItemFilterScript()
         {
             ItemFilterBlocks = new ObservableCollection<IItemFilterBlockBase>();
             ItemFilterBlockGroups = new ObservableCollection<ItemFilterBlockGroup>
             {
                 new ItemFilterBlockGroup("Root", null)
             };
-            ThemeComponents = new ThemeComponentCollection { IsMasterCollection = true};
+            ThemeComponents = new ThemeComponentCollection { IsMasterCollection = true };
             ItemFilterScriptSettings = new ItemFilterScriptSettings(ThemeComponents);
         }
 
+        public ItemFilterScript(ICommandManagerInternal commandManager) : this()
+        {
+            CommandManager = commandManager;
+            commandManager.SetScript(this);
+        }
+
+        public ICommandManager CommandManager { get; }
+
         public ObservableCollection<IItemFilterBlockBase> ItemFilterBlocks { get; }
         public ObservableCollection<ItemFilterBlockGroup> ItemFilterBlockGroups { get; }
 
@@ -45,6 +68,22 @@ namespace Filtration.ObjectModel
         public string Description { get; set; }
         public DateTime DateModified { get; set; }
 
+        public bool IsDirty
+        {
+            get => _isDirty;
+            private set
+            {
+                if (value == _isDirty) return;
+                _isDirty = value;
+                OnPropertyChanged();
+            }
+        }
+
+        public void SetIsDirty(bool isDirty)
+        {
+            IsDirty = isDirty;
+        }
+
         public List<string> Validate()
         {
             var validationErrors = new List<string>();
@@ -106,5 +145,12 @@ namespace Filtration.ObjectModel
             return true;
         }
 
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        [NotifyPropertyChangedInvocator]
+        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
     }
 }
diff --git a/Filtration.ObjectModel/Properties/Annotations.cs b/Filtration.ObjectModel/Properties/Annotations.cs
index c30d43a..2e7c846 100644
--- a/Filtration.ObjectModel/Properties/Annotations.cs
+++ b/Filtration.ObjectModel/Properties/Annotations.cs
@@ -1,4 +1,26 @@
-using System;
+/* MIT License
+
+Copyright (c) 2016 JetBrains http://www.jetbrains.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE. */
+
+using System;
 
 #pragma warning disable 1591
 // ReSharper disable UnusedMember.Global
@@ -7,7 +29,6 @@
 // ReSharper disable IntroduceOptionalParameters.Global
 // ReSharper disable MemberCanBeProtected.Global
 // ReSharper disable InconsistentNaming
-// ReSharper disable CheckNamespace
 
 namespace Filtration.ObjectModel.Annotations
 {
@@ -16,32 +37,37 @@ namespace Filtration.ObjectModel.Annotations
   /// so the check for <c>null</c> is necessary before its usage.
   /// </summary>
   /// <example><code>
-  /// [CanBeNull] public object Test() { return null; }
-  /// public void UseTest() {
+  /// [CanBeNull] object Test() => null;
+  /// 
+  /// void UseTest() {
   ///   var p = Test();
   ///   var s = p.ToString(); // Warning: Possible 'System.NullReferenceException'
   /// }
   /// </code></example>
   [AttributeUsage(
     AttributeTargets.Method | AttributeTargets.Parameter | AttributeTargets.Property |
-    AttributeTargets.Delegate | AttributeTargets.Field | AttributeTargets.Event)]
+    AttributeTargets.Delegate | AttributeTargets.Field | AttributeTargets.Event |
+    AttributeTargets.Class | AttributeTargets.Interface | AttributeTargets.GenericParameter)]
   public sealed class CanBeNullAttribute : Attribute { }
 
   /// <summary>
   /// Indicates that the value of the marked element could never be <c>null</c>.
   /// </summary>
   /// <example><code>
-  /// [NotNull] public object Foo() {
+  /// [NotNull] object Foo() {
   ///   return null; // Warning: Possible 'null' assignment
   /// }
   /// </code></example>
   [AttributeUsage(
     AttributeTargets.Method | AttributeTargets.Parameter | AttributeTargets.Property |
-    AttributeTargets.Delegate | AttributeTargets.Field | AttributeTargets.Event)]
+    AttributeTargets.Delegate | AttributeTargets.Field | AttributeTargets.Event |
+    AttributeTargets.Class | AttributeTargets.Interface | AttributeTargets.GenericParameter)]
   public sealed class NotNullAttribute : Attribute { }
 
   /// <summary>
-  /// Indicates that collection or enumerable value does not contain null elements.
+  /// Can be appplied to symbols of types derived from IEnumerable as well as to symbols of Task
+  /// and Lazy classes to indicate that the value of a collection item, of the Task.Result property
+  /// or of the Lazy.Value property can never be null.
   /// </summary>
   [AttributeUsage(
     AttributeTargets.Method | AttributeTargets.Parameter | AttributeTargets.Property |
@@ -49,7 +75,9 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class ItemNotNullAttribute : Attribute { }
 
   /// <summary>
-  /// Indicates that collection or enumerable value can contain null elements.
+  /// Can be appplied to symbols of types derived from IEnumerable as well as to symbols of Task
+  /// and Lazy classes to indicate that the value of a collection item, of the Task.Result property
+  /// or of the Lazy.Value property can be null.
   /// </summary>
   [AttributeUsage(
     AttributeTargets.Method | AttributeTargets.Parameter | AttributeTargets.Property |
@@ -63,8 +91,9 @@ namespace Filtration.ObjectModel.Annotations
   /// </summary>
   /// <example><code>
   /// [StringFormatMethod("message")]
-  /// public void ShowError(string message, params object[] args) { /* do something */ }
-  /// public void Foo() {
+  /// void ShowError(string message, params object[] args) { /* do something */ }
+  /// 
+  /// void Foo() {
   ///   ShowError("Failed: {0}"); // Warning: Non-existing argument in format string
   /// }
   /// </code></example>
@@ -76,22 +105,24 @@ namespace Filtration.ObjectModel.Annotations
     /// <param name="formatParameterName">
     /// Specifies which parameter of an annotated method should be treated as format-string
     /// </param>
-    public StringFormatMethodAttribute(string formatParameterName)
+    public StringFormatMethodAttribute([NotNull] string formatParameterName)
     {
       FormatParameterName = formatParameterName;
     }
 
-    public string FormatParameterName { get; private set; }
+    [NotNull] public string FormatParameterName { get; private set; }
   }
 
   /// <summary>
   /// For a parameter that is expected to be one of the limited set of values.
   /// Specify fields of which type should be used as values for this parameter.
   /// </summary>
-  [AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.Field)]
+  [AttributeUsage(
+    AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.Field,
+    AllowMultiple = true)]
   public sealed class ValueProviderAttribute : Attribute
   {
-    public ValueProviderAttribute(string name)
+    public ValueProviderAttribute([NotNull] string name)
     {
       Name = name;
     }
@@ -105,7 +136,7 @@ namespace Filtration.ObjectModel.Annotations
   /// the parameter of <see cref="System.ArgumentNullException"/>.
   /// </summary>
   /// <example><code>
-  /// public void Foo(string param) {
+  /// void Foo(string param) {
   ///   if (param == null)
   ///     throw new ArgumentNullException("par"); // Warning: Cannot resolve symbol
   /// }
@@ -131,10 +162,12 @@ namespace Filtration.ObjectModel.Annotations
   /// <example><code>
   /// public class Foo : INotifyPropertyChanged {
   ///   public event PropertyChangedEventHandler PropertyChanged;
+  /// 
   ///   [NotifyPropertyChangedInvocator]
   ///   protected virtual void NotifyChanged(string propertyName) { ... }
   ///
-  ///   private string _name;
+  ///   string _name;
+  /// 
   ///   public string Name {
   ///     get { return _name; }
   ///     set { _name = value; NotifyChanged("LastName"); /* Warning */ }
@@ -153,12 +186,12 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class NotifyPropertyChangedInvocatorAttribute : Attribute
   {
     public NotifyPropertyChangedInvocatorAttribute() { }
-    public NotifyPropertyChangedInvocatorAttribute(string parameterName)
+    public NotifyPropertyChangedInvocatorAttribute([NotNull] string parameterName)
     {
       ParameterName = parameterName;
     }
 
-    public string ParameterName { get; private set; }
+    [CanBeNull] public string ParameterName { get; private set; }
   }
 
   /// <summary>
@@ -174,15 +207,16 @@ namespace Filtration.ObjectModel.Annotations
   /// <item>Value    ::= true | false | null | notnull | canbenull</item>
   /// </list>
   /// If method has single input parameter, it's name could be omitted.<br/>
-  /// Using <c>halt</c> (or <c>void</c>/<c>nothing</c>, which is the same)
-  /// for method output means that the methos doesn't return normally.<br/>
-  /// <c>canbenull</c> annotation is only applicable for output parameters.<br/>
-  /// You can use multiple <c>[ContractAnnotation]</c> for each FDT row,
-  /// or use single attribute with rows separated by semicolon.<br/>
+  /// Using <c>halt</c> (or <c>void</c>/<c>nothing</c>, which is the same) for method output
+  /// means that the methos doesn't return normally (throws or terminates the process).<br/>
+  /// Value <c>canbenull</c> is only applicable for output parameters.<br/>
+  /// You can use multiple <c>[ContractAnnotation]</c> for each FDT row, or use single attribute
+  /// with rows separated by semicolon. There is no notion of order rows, all rows are checked
+  /// for applicability and applied per each program state tracked by R# analysis.<br/>
   /// </syntax>
   /// <examples><list>
   /// <item><code>
-  /// [ContractAnnotation("=> halt")]
+  /// [ContractAnnotation("=&gt; halt")]
   /// public void TerminationMethod()
   /// </code></item>
   /// <item><code>
@@ -190,17 +224,17 @@ namespace Filtration.ObjectModel.Annotations
   /// public void Assert(bool condition, string text) // regular assertion method
   /// </code></item>
   /// <item><code>
-  /// [ContractAnnotation("s:null => true")]
+  /// [ContractAnnotation("s:null =&gt; true")]
   /// public bool IsNullOrEmpty(string s) // string.IsNullOrEmpty()
   /// </code></item>
   /// <item><code>
   /// // A method that returns null if the parameter is null,
   /// // and not null if the parameter is not null
-  /// [ContractAnnotation("null => null; notnull => notnull")]
+  /// [ContractAnnotation("null =&gt; null; notnull =&gt; notnull")]
   /// public object Transform(object data) 
   /// </code></item>
   /// <item><code>
-  /// [ContractAnnotation("s:null=>false; =>true,result:notnull; =>false, result:null")]
+  /// [ContractAnnotation("=&gt; true, result: notnull; =&gt; false, result: null")]
   /// public bool TryParse(string s, out Person result)
   /// </code></item>
   /// </list></examples>
@@ -216,7 +250,8 @@ namespace Filtration.ObjectModel.Annotations
       ForceFullStates = forceFullStates;
     }
 
-    public string Contract { get; private set; }
+    [NotNull] public string Contract { get; private set; }
+
     public bool ForceFullStates { get; private set; }
   }
 
@@ -225,14 +260,15 @@ namespace Filtration.ObjectModel.Annotations
   /// </summary>
   /// <example><code>
   /// [LocalizationRequiredAttribute(true)]
-  /// public class Foo {
-  ///   private string str = "my string"; // Warning: Localizable string
+  /// class Foo {
+  ///   string str = "my string"; // Warning: Localizable string
   /// }
   /// </code></example>
   [AttributeUsage(AttributeTargets.All)]
   public sealed class LocalizationRequiredAttribute : Attribute
   {
     public LocalizationRequiredAttribute() : this(true) { }
+
     public LocalizationRequiredAttribute(bool required)
     {
       Required = required;
@@ -250,8 +286,9 @@ namespace Filtration.ObjectModel.Annotations
   /// <example><code>
   /// [CannotApplyEqualityOperator]
   /// class NoEquality { }
+  /// 
   /// class UsesNoEquality {
-  ///   public void Test() {
+  ///   void Test() {
   ///     var ca1 = new NoEquality();
   ///     var ca2 = new NoEquality();
   ///     if (ca1 != null) { // OK
@@ -269,9 +306,10 @@ namespace Filtration.ObjectModel.Annotations
   /// </summary>
   /// <example><code>
   /// [BaseTypeRequired(typeof(IComponent)] // Specify requirement
-  /// public class ComponentAttribute : Attribute { }
+  /// class ComponentAttribute : Attribute { }
+  /// 
   /// [Component] // ComponentAttribute requires implementing IComponent interface
-  /// public class MyComponent : IComponent { }
+  /// class MyComponent : IComponent { }
   /// </code></example>
   [AttributeUsage(AttributeTargets.Class, AllowMultiple = true)]
   [BaseTypeRequired(typeof(Attribute))]
@@ -308,6 +346,7 @@ namespace Filtration.ObjectModel.Annotations
     }
 
     public ImplicitUseKindFlags UseKindFlags { get; private set; }
+
     public ImplicitUseTargetFlags TargetFlags { get; private set; }
   }
 
@@ -334,6 +373,7 @@ namespace Filtration.ObjectModel.Annotations
     }
 
     [UsedImplicitly] public ImplicitUseKindFlags UseKindFlags { get; private set; }
+
     [UsedImplicitly] public ImplicitUseTargetFlags TargetFlags { get; private set; }
   }
 
@@ -377,12 +417,13 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class PublicAPIAttribute : Attribute
   {
     public PublicAPIAttribute() { }
+
     public PublicAPIAttribute([NotNull] string comment)
     {
       Comment = comment;
     }
 
-    public string Comment { get; private set; }
+    [CanBeNull] public string Comment { get; private set; }
   }
 
   /// <summary>
@@ -398,15 +439,51 @@ namespace Filtration.ObjectModel.Annotations
   /// The same as <c>System.Diagnostics.Contracts.PureAttribute</c>.
   /// </summary>
   /// <example><code>
-  /// [Pure] private int Multiply(int x, int y) { return x * y; }
-  /// public void Foo() {
-  ///   const int a = 2, b = 2;
-  ///   Multiply(a, b); // Waring: Return value of pure method is not used
+  /// [Pure] int Multiply(int x, int y) => x * y;
+  /// 
+  /// void M() {
+  ///   Multiply(123, 42); // Waring: Return value of pure method is not used
   /// }
   /// </code></example>
   [AttributeUsage(AttributeTargets.Method)]
   public sealed class PureAttribute : Attribute { }
 
+  /// <summary>
+  /// Indicates that the return value of method invocation must be used.
+  /// </summary>
+  [AttributeUsage(AttributeTargets.Method)]
+  public sealed class MustUseReturnValueAttribute : Attribute
+  {
+    public MustUseReturnValueAttribute() { }
+
+    public MustUseReturnValueAttribute([NotNull] string justification)
+    {
+      Justification = justification;
+    }
+
+    [CanBeNull] public string Justification { get; private set; }
+  }
+
+  /// <summary>
+  /// Indicates the type member or parameter of some type, that should be used instead of all other ways
+  /// to get the value that type. This annotation is useful when you have some "context" value evaluated
+  /// and stored somewhere, meaning that all other ways to get this value must be consolidated with existing one.
+  /// </summary>
+  /// <example><code>
+  /// class Foo {
+  ///   [ProvidesContext] IBarService _barService = ...;
+  /// 
+  ///   void ProcessNode(INode node) {
+  ///     DoSomething(node, node.GetGlobalServices().Bar);
+  ///     //              ^ Warning: use value of '_barService' field
+  ///   }
+  /// }
+  /// </code></example>
+  [AttributeUsage(
+    AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Parameter | AttributeTargets.Method |
+    AttributeTargets.Class | AttributeTargets.Interface | AttributeTargets.Struct | AttributeTargets.GenericParameter)]
+  public sealed class ProvidesContextAttribute : Attribute { }
+
   /// <summary>
   /// Indicates that a parameter is a path to a file or a folder within a web project.
   /// Path can be relative or absolute, starting from web root (~).
@@ -415,12 +492,13 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class PathReferenceAttribute : Attribute
   {
     public PathReferenceAttribute() { }
-    public PathReferenceAttribute([PathReference] string basePath)
+
+    public PathReferenceAttribute([NotNull, PathReference] string basePath)
     {
       BasePath = basePath;
     }
 
-    public string BasePath { get; private set; }
+    [CanBeNull] public string BasePath { get; private set; }
   }
 
   /// <summary>
@@ -484,7 +562,7 @@ namespace Filtration.ObjectModel.Annotations
     /// Allows specifying a macro that will be executed for a <see cref="SourceTemplateAttribute">source template</see>
     /// parameter when the template is expanded.
     /// </summary>
-    public string Expression { get; set; }
+    [CanBeNull] public string Expression { get; set; }
 
     /// <summary>
     /// Allows specifying which occurrence of the target parameter becomes editable when the template is deployed.
@@ -500,73 +578,73 @@ namespace Filtration.ObjectModel.Annotations
     /// Identifies the target parameter of a <see cref="SourceTemplateAttribute">source template</see> if the
     /// <see cref="MacroAttribute"/> is applied on a template method.
     /// </summary>
-    public string Target { get; set; }
+    [CanBeNull] public string Target { get; set; }
   }
 
-  [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+  [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
   public sealed class AspMvcAreaMasterLocationFormatAttribute : Attribute
   {
-    public AspMvcAreaMasterLocationFormatAttribute(string format)
+    public AspMvcAreaMasterLocationFormatAttribute([NotNull] string format)
     {
       Format = format;
     }
 
-    public string Format { get; private set; }
+    [NotNull] public string Format { get; private set; }
   }
 
-  [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+  [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
   public sealed class AspMvcAreaPartialViewLocationFormatAttribute : Attribute
   {
-    public AspMvcAreaPartialViewLocationFormatAttribute(string format)
+    public AspMvcAreaPartialViewLocationFormatAttribute([NotNull] string format)
     {
       Format = format;
     }
 
-    public string Format { get; private set; }
+    [NotNull] public string Format { get; private set; }
   }
 
-  [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+  [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
   public sealed class AspMvcAreaViewLocationFormatAttribute : Attribute
   {
-    public AspMvcAreaViewLocationFormatAttribute(string format)
+    public AspMvcAreaViewLocationFormatAttribute([NotNull] string format)
     {
       Format = format;
     }
 
-    public string Format { get; private set; }
+    [NotNull] public string Format { get; private set; }
   }
 
-  [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+  [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
   public sealed class AspMvcMasterLocationFormatAttribute : Attribute
   {
-    public AspMvcMasterLocationFormatAttribute(string format)
+    public AspMvcMasterLocationFormatAttribute([NotNull] string format)
     {
       Format = format;
     }
 
-    public string Format { get; private set; }
+    [NotNull] public string Format { get; private set; }
   }
 
-  [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+  [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
   public sealed class AspMvcPartialViewLocationFormatAttribute : Attribute
   {
-    public AspMvcPartialViewLocationFormatAttribute(string format)
+    public AspMvcPartialViewLocationFormatAttribute([NotNull] string format)
     {
       Format = format;
     }
 
-    public string Format { get; private set; }
+    [NotNull] public string Format { get; private set; }
   }
 
-  [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+  [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
   public sealed class AspMvcViewLocationFormatAttribute : Attribute
   {
-    public AspMvcViewLocationFormatAttribute(string format)
+    public AspMvcViewLocationFormatAttribute([NotNull] string format)
     {
       Format = format;
     }
 
-    public string Format { get; private set; }
+    [NotNull] public string Format { get; private set; }
   }
 
   /// <summary>
@@ -579,12 +657,13 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class AspMvcActionAttribute : Attribute
   {
     public AspMvcActionAttribute() { }
-    public AspMvcActionAttribute(string anonymousProperty)
+
+    public AspMvcActionAttribute([NotNull] string anonymousProperty)
     {
       AnonymousProperty = anonymousProperty;
     }
 
-    public string AnonymousProperty { get; private set; }
+    [CanBeNull] public string AnonymousProperty { get; private set; }
   }
 
   /// <summary>
@@ -596,12 +675,13 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class AspMvcAreaAttribute : Attribute
   {
     public AspMvcAreaAttribute() { }
-    public AspMvcAreaAttribute(string anonymousProperty)
+
+    public AspMvcAreaAttribute([NotNull] string anonymousProperty)
     {
       AnonymousProperty = anonymousProperty;
     }
 
-    public string AnonymousProperty { get; private set; }
+    [CanBeNull] public string AnonymousProperty { get; private set; }
   }
 
   /// <summary>
@@ -614,12 +694,13 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class AspMvcControllerAttribute : Attribute
   {
     public AspMvcControllerAttribute() { }
-    public AspMvcControllerAttribute(string anonymousProperty)
+
+    public AspMvcControllerAttribute([NotNull] string anonymousProperty)
     {
       AnonymousProperty = anonymousProperty;
     }
 
-    public string AnonymousProperty { get; private set; }
+    [CanBeNull] public string AnonymousProperty { get; private set; }
   }
 
   /// <summary>
@@ -649,7 +730,7 @@ namespace Filtration.ObjectModel.Annotations
   /// ASP.NET MVC attribute. Allows disabling inspections for MVC views within a class or a method.
   /// </summary>
   [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
-  public sealed class AspMvcSupressViewErrorAttribute : Attribute { }
+  public sealed class AspMvcSuppressViewErrorAttribute : Attribute { }
 
   /// <summary>
   /// ASP.NET MVC attribute. Indicates that a parameter is an MVC display template.
@@ -677,13 +758,27 @@ namespace Filtration.ObjectModel.Annotations
 
   /// <summary>
   /// ASP.NET MVC attribute. If applied to a parameter, indicates that the parameter
-  /// is an MVC view. If applied to a method, the MVC view name is calculated implicitly
+  /// is an MVC view component. If applied to a method, the MVC view name is calculated implicitly
   /// from the context. Use this attribute for custom wrappers similar to
   /// <c>System.Web.Mvc.Controller.View(Object)</c>.
   /// </summary>
   [AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Method)]
   public sealed class AspMvcViewAttribute : Attribute { }
 
+  /// <summary>
+  /// ASP.NET MVC attribute. If applied to a parameter, indicates that the parameter
+  /// is an MVC view component name.
+  /// </summary>
+  [AttributeUsage(AttributeTargets.Parameter)]
+  public sealed class AspMvcViewComponentAttribute : Attribute { }
+
+  /// <summary>
+  /// ASP.NET MVC attribute. If applied to a parameter, indicates that the parameter
+  /// is an MVC view component view. If applied to a method, the MVC view component view name is default.
+  /// </summary>
+  [AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Method)]
+  public sealed class AspMvcViewComponentViewAttribute : Attribute { }
+
   /// <summary>
   /// ASP.NET MVC attribute. When applied to a parameter of an attribute,
   /// indicates that this parameter is an MVC action name.
@@ -702,12 +797,13 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class HtmlElementAttributesAttribute : Attribute
   {
     public HtmlElementAttributesAttribute() { }
-    public HtmlElementAttributesAttribute(string name)
+
+    public HtmlElementAttributesAttribute([NotNull] string name)
     {
       Name = name;
     }
 
-    public string Name { get; private set; }
+    [CanBeNull] public string Name { get; private set; }
   }
 
   [AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Field | AttributeTargets.Property)]
@@ -730,9 +826,10 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class RazorSectionAttribute : Attribute { }
 
   /// <summary>
-  /// Indicates how method invocation affects content of the collection.
+  /// Indicates how method, constructor invocation or property access
+  /// over collection type affects content of the collection.
   /// </summary>
-  [AttributeUsage(AttributeTargets.Method)]
+  [AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Property)]
   public sealed class CollectionAccessAttribute : Attribute
   {
     public CollectionAccessAttribute(CollectionAccessType collectionAccessType)
@@ -824,6 +921,16 @@ namespace Filtration.ObjectModel.Annotations
   [AttributeUsage(AttributeTargets.Parameter)]
   public sealed class RegexPatternAttribute : Attribute { }
 
+  /// <summary>
+  /// Prevents the Member Reordering feature from tossing members of the marked class.
+  /// </summary>
+  /// <remarks>
+  /// The attribute must be mentioned in your member reordering patterns
+  /// </remarks>
+  [AttributeUsage(
+    AttributeTargets.Class | AttributeTargets.Interface | AttributeTargets.Struct | AttributeTargets.Enum)]
+  public sealed class NoReorderAttribute : Attribute { }
+
   /// <summary>
   /// XAML attribute. Indicates the type that has <c>ItemsSource</c> property and should be treated
   /// as <c>ItemsControl</c>-derived type, to enable inner items <c>DataContext</c> type resolve.
@@ -832,7 +939,7 @@ namespace Filtration.ObjectModel.Annotations
   public sealed class XamlItemsControlAttribute : Attribute { }
 
   /// <summary>
-  /// XAML attibute. Indicates the property of some <c>BindingBase</c>-derived type, that
+  /// XAML attribute. Indicates the property of some <c>BindingBase</c>-derived type, that
   /// is used to bind some item of <c>ItemsControl</c>-derived type. This annotation will
   /// enable the <c>DataContext</c> type resolve for XAML bindings for such properties.
   /// </summary>
@@ -846,14 +953,15 @@ namespace Filtration.ObjectModel.Annotations
   [AttributeUsage(AttributeTargets.Class, AllowMultiple = true)]
   public sealed class AspChildControlTypeAttribute : Attribute
   {
-    public AspChildControlTypeAttribute(string tagName, Type controlType)
+    public AspChildControlTypeAttribute([NotNull] string tagName, [NotNull] Type controlType)
     {
       TagName = tagName;
       ControlType = controlType;
     }
 
-    public string TagName { get; private set; }
-    public Type ControlType { get; private set; }
+    [NotNull] public string TagName { get; private set; }
+
+    [NotNull] public Type ControlType { get; private set; }
   }
 
   [AttributeUsage(AttributeTargets.Property | AttributeTargets.Method)]
@@ -873,7 +981,7 @@ namespace Filtration.ObjectModel.Annotations
       Attribute = attribute;
     }
 
-    public string Attribute { get; private set; }
+    [NotNull] public string Attribute { get; private set; }
   }
 
   [AttributeUsage(AttributeTargets.Property)]
@@ -890,25 +998,37 @@ namespace Filtration.ObjectModel.Annotations
   [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
   public sealed class RazorImportNamespaceAttribute : Attribute
   {
-    public RazorImportNamespaceAttribute(string name)
+    public RazorImportNamespaceAttribute([NotNull] string name)
     {
       Name = name;
     }
 
-    public string Name { get; private set; }
+    [NotNull] public string Name { get; private set; }
   }
 
   [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
   public sealed class RazorInjectionAttribute : Attribute
   {
-    public RazorInjectionAttribute(string type, string fieldName)
+    public RazorInjectionAttribute([NotNull] string type, [NotNull] string fieldName)
     {
       Type = type;
       FieldName = fieldName;
     }
 
-    public string Type { get; private set; }
-    public string FieldName { get; private set; }
+    [NotNull] public string Type { get; private set; }
+
+    [NotNull] public string FieldName { get; private set; }
+  }
+
+  [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+  public sealed class RazorDirectiveAttribute : Attribute
+  {
+    public RazorDirectiveAttribute([NotNull] string directive)
+    {
+      Directive = directive;
+    }
+
+    [NotNull] public string Directive { get; private set; }
   }
 
   [AttributeUsage(AttributeTargets.Method)]
@@ -925,13 +1045,4 @@ namespace Filtration.ObjectModel.Annotations
 
   [AttributeUsage(AttributeTargets.Parameter)]
   public sealed class RazorWriteMethodParameterAttribute : Attribute { }
-
-  /// <summary>
-  /// Prevents the Member Reordering feature from tossing members of the marked class.
-  /// </summary>
-  /// <remarks>
-  /// The attribute must be mentioned in your member reordering patterns
-  /// </remarks>
-  [AttributeUsage(AttributeTargets.All)]
-  public sealed class NoReorder : Attribute { }
 }
\ No newline at end of file
diff --git a/Filtration.ObjectModel/Properties/AssemblyInfo.cs b/Filtration.ObjectModel/Properties/AssemblyInfo.cs
index 6ecac2f..5f4cbb6 100644
--- a/Filtration.ObjectModel/Properties/AssemblyInfo.cs
+++ b/Filtration.ObjectModel/Properties/AssemblyInfo.cs
@@ -1,4 +1,5 @@
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 // General Information about an assembly is controlled through the following 
@@ -33,3 +34,9 @@ using System.Runtime.InteropServices;
 // [assembly: AssemblyVersion("1.0.*")]
 [assembly: AssemblyVersion("1.0.0.0")]
 [assembly: AssemblyFileVersion("1.0.0.0")]
+
+[assembly: InternalsVisibleTo("Filtration.ItemFilterPreview.Tests")]
+[assembly: InternalsVisibleTo("Filtration.ObjectModel.Tests")]
+[assembly: InternalsVisibleTo("Filtration.Parser.Tests")]
+[assembly: InternalsVisibleTo("Filtration.Tests")]
+[assembly: InternalsVisibleTo("Filtration.ThemeEditor.Tests")]
\ No newline at end of file
diff --git a/Filtration.ObjectModel/WindsorInstallers/CommandsInstaller.cs b/Filtration.ObjectModel/WindsorInstallers/CommandsInstaller.cs
new file mode 100644
index 0000000..eba5a12
--- /dev/null
+++ b/Filtration.ObjectModel/WindsorInstallers/CommandsInstaller.cs
@@ -0,0 +1,21 @@
+using Castle.MicroKernel.Registration;
+using Castle.MicroKernel.SubSystems.Configuration;
+using Castle.Windsor;
+using Filtration.ObjectModel.Commands;
+
+namespace Filtration.ObjectModel.WindsorInstallers
+{
+    public class CommandsInstaller : IWindsorInstaller
+    {
+        public void Install(IWindsorContainer container, IConfigurationStore store)
+        {
+
+            container.Register(Component
+                .For<ICommandManager>()
+                .Forward<ICommandManagerInternal>()
+                .ImplementedBy<CommandManager>()
+                .LifestyleTransient());
+
+        }
+    }
+}
diff --git a/Filtration.ObjectModel/WindsorInstallers/ModelsInstaller.cs b/Filtration.ObjectModel/WindsorInstallers/ModelsInstaller.cs
new file mode 100644
index 0000000..d0c38d4
--- /dev/null
+++ b/Filtration.ObjectModel/WindsorInstallers/ModelsInstaller.cs
@@ -0,0 +1,23 @@
+using Castle.Facilities.TypedFactory;
+using Castle.MicroKernel.Registration;
+using Castle.MicroKernel.SubSystems.Configuration;
+using Castle.Windsor;
+using Filtration.ObjectModel.Factories;
+
+namespace Filtration.ObjectModel.WindsorInstallers
+{
+    public class ModelsInstaller : IWindsorInstaller
+    {
+        public void Install(IWindsorContainer container, IConfigurationStore store)
+        {
+            container.Register(Component
+                .For<IItemFilterScript>()
+                .ImplementedBy<ItemFilterScript>()
+                .LifestyleTransient());
+
+            container.Register(Component
+                .For<IItemFilterScriptFactory>()
+                .AsFactory());
+        }
+    }
+}
diff --git a/Filtration.ObjectModel/packages.config b/Filtration.ObjectModel/packages.config
new file mode 100644
index 0000000..2eb5957
--- /dev/null
+++ b/Filtration.ObjectModel/packages.config
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Castle.Core" version="3.3.0" targetFramework="net461" />
+  <package id="Castle.Windsor" version="3.4.0" targetFramework="net461" />
+</packages>
\ No newline at end of file
diff --git a/Filtration.Parser.Interface/Services/IItemFilterScriptTranslator.cs b/Filtration.Parser.Interface/Services/IItemFilterScriptTranslator.cs
index 6cb2e70..06c9a93 100644
--- a/Filtration.Parser.Interface/Services/IItemFilterScriptTranslator.cs
+++ b/Filtration.Parser.Interface/Services/IItemFilterScriptTranslator.cs
@@ -4,7 +4,7 @@ namespace Filtration.Parser.Interface.Services
 {
     public interface IItemFilterScriptTranslator
     {
-        ItemFilterScript TranslateStringToItemFilterScript(string inputString);
-        string TranslateItemFilterScriptToString(ItemFilterScript script);
+        IItemFilterScript TranslateStringToItemFilterScript(string inputString);
+        string TranslateItemFilterScriptToString(IItemFilterScript script);
     }
 }
\ No newline at end of file
diff --git a/Filtration.Parser.Tests/Services/TestItemFilterScriptTranslator.cs b/Filtration.Parser.Tests/Services/TestItemFilterScriptTranslator.cs
index 9bca5bb..886102e 100644
--- a/Filtration.Parser.Tests/Services/TestItemFilterScriptTranslator.cs
+++ b/Filtration.Parser.Tests/Services/TestItemFilterScriptTranslator.cs
@@ -5,6 +5,7 @@ using System.Linq;
 using Filtration.ObjectModel;
 using Filtration.ObjectModel.BlockItemTypes;
 using Filtration.ObjectModel.Enums;
+using Filtration.ObjectModel.Factories;
 using Filtration.ObjectModel.ThemeEditor;
 using Filtration.Parser.Interface.Services;
 using Filtration.Parser.Services;
@@ -19,12 +20,9 @@ namespace Filtration.Parser.Tests.Services
     [TestFixture]
     public class TestItemFilterScriptTranslator
     {
-        private ItemFilterScriptTranslatorTestUtility _testUtility;
-
         [SetUp]
         public void ItemFilterScriptTranslatorTestSetup()
         {
-            _testUtility = new ItemFilterScriptTranslatorTestUtility();
             Settings.Default.Reset();
         }
 
@@ -33,13 +31,16 @@ namespace Filtration.Parser.Tests.Services
         {
             // Arrange
             var testInput = Resources.testscript;
+            
+            var mockItemFilterBlockTranslator = new Mock<IItemFilterBlockTranslator>();
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: mockItemFilterBlockTranslator.Object);
 
             // Act
-            var script = _testUtility.ScriptTranslator.TranslateStringToItemFilterScript(testInput);
+            var script = translator.TranslateStringToItemFilterScript(testInput);
 
             // Assert
             Assert.AreEqual(5, script.ItemFilterBlocks.Count);
-            _testUtility.MockItemFilterBlockTranslator.Verify(t => t.TranslateStringToItemFilterBlock(It.IsAny<string>(), It.IsAny<IItemFilterScriptSettings>()));
+            mockItemFilterBlockTranslator.Verify(t => t.TranslateStringToItemFilterBlock(It.IsAny<string>(), It.IsAny<IItemFilterScriptSettings>()));
         }
 
         [Test]
@@ -54,8 +55,10 @@ namespace Filtration.Parser.Tests.Services
                                         Environment.NewLine +
                                         "End Script Description";
 
+            var translator = CreateItemFilterScriptTranslator();
+
             // Act
-            var script = _testUtility.ScriptTranslator.TranslateStringToItemFilterScript(testInput);
+            var script = translator.TranslateStringToItemFilterScript(testInput);
 
             // Assert
             Assert.AreEqual(expectedDescription, script.Description);
@@ -67,8 +70,8 @@ namespace Filtration.Parser.Tests.Services
             // Arrange
             var testInput = Resources.ThioleItemFilter;
 
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator, _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             translator.TranslateStringToItemFilterScript(testInput);
@@ -83,9 +86,9 @@ namespace Filtration.Parser.Tests.Services
             // Arrange
             var testInput = Resources.testscript2;
 
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator, _testUtility.MockBlockGroupHierarchyBuilder.Object);
-            
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
+
             // Act
             var result = translator.TranslateStringToItemFilterScript(testInput);
 
@@ -119,15 +122,20 @@ namespace Filtration.Parser.Tests.Services
             const string blockOutput = "Test Script Output";
 
             testScript.ItemFilterBlocks.Add(testBlock);
+            
+            var mockItemFilterBlockTranslator = new Mock<IItemFilterBlockTranslator>();
+            mockItemFilterBlockTranslator
+                .Setup(t => t.TranslateItemFilterBlockToString(testBlock))
+                .Returns(blockOutput)
+                .Verifiable();
 
-            _testUtility.MockItemFilterBlockTranslator.Setup(t => t.TranslateItemFilterBlockToString(testBlock)).Returns(blockOutput).Verifiable();
-
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: mockItemFilterBlockTranslator.Object);
 
             // Act
-            _testUtility.ScriptTranslator.TranslateItemFilterScriptToString(testScript);
+            translator.TranslateItemFilterScriptToString(testScript);
 
             // Assert
-            _testUtility.MockItemFilterBlockTranslator.Verify();
+            mockItemFilterBlockTranslator.Verify();
         }
 
         [Test]
@@ -156,9 +164,8 @@ namespace Filtration.Parser.Tests.Services
                                  "    Width = 3" + Environment.NewLine +
                                  "    SetFontSize 7" + Environment.NewLine;
 
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator,
-                _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             var result = translator.TranslateItemFilterScriptToString(script);
@@ -201,9 +208,8 @@ namespace Filtration.Parser.Tests.Services
                                  "    Width = 3" + Environment.NewLine +
                                  "    SetFontSize 7" + Environment.NewLine + Environment.NewLine;
 
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator,
-                _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             var result = translator.TranslateItemFilterScriptToString(script);
@@ -225,8 +231,10 @@ namespace Filtration.Parser.Tests.Services
                                  Environment.NewLine +
                                  "# Test script description" + Environment.NewLine + Environment.NewLine;
 
+            var translator = CreateItemFilterScriptTranslator();
+
             // Act
-            var result = _testUtility.ScriptTranslator.TranslateItemFilterScriptToString(script);
+            var result = translator.TranslateItemFilterScriptToString(script);
 
             // Assert
             Assert.AreEqual(expectedOutput, result);
@@ -240,9 +248,8 @@ namespace Filtration.Parser.Tests.Services
                                   Environment.NewLine +
                                   "Show" + Environment.NewLine +
                                   "BaseType \"Maelström Staff\"" + Environment.NewLine + Environment.NewLine;
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator,
-                _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             var result = translator.TranslateStringToItemFilterScript(testInputScript);
@@ -274,9 +281,8 @@ namespace Filtration.Parser.Tests.Services
                                   "    SetTextColor 255 255 0";
 
 
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator,
-                _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             var result = translator.TranslateStringToItemFilterScript(testInputScript);
@@ -306,9 +312,8 @@ namespace Filtration.Parser.Tests.Services
                                   "    SetTextColor 255 255 0";
 
 
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator,
-                _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             var result = translator.TranslateStringToItemFilterScript(testInputScript);
@@ -340,9 +345,8 @@ namespace Filtration.Parser.Tests.Services
                                   "#Disabled Block End";
 
 
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            var translator = new ItemFilterScriptTranslator(blockTranslator,
-                _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(Mock.Of<IBlockGroupHierarchyBuilder>());
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             var result = translator.TranslateStringToItemFilterScript(testInputScript);
@@ -370,14 +374,14 @@ namespace Filtration.Parser.Tests.Services
                                   "#Disabled Block End";
 
 
-            
-            var blockTranslator = new ItemFilterBlockTranslator(_testUtility.MockBlockGroupHierarchyBuilder.Object);
-            _testUtility.MockBlockGroupHierarchyBuilder.Setup(
-                b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>()))
+            var mockBlockGroupHierarchyBuilder = new Mock<IBlockGroupHierarchyBuilder>();
+            mockBlockGroupHierarchyBuilder.Setup(
+                    b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>()))
                 .Returns(new ItemFilterBlockGroup("My Block Group", null));
 
-            var translator = new ItemFilterScriptTranslator(blockTranslator,
-                _testUtility.MockBlockGroupHierarchyBuilder.Object);
+            var blockTranslator = new ItemFilterBlockTranslator(mockBlockGroupHierarchyBuilder.Object);
+            
+            var translator = CreateItemFilterScriptTranslator(itemFilterBlockTranslator: blockTranslator);
 
             // Act
             var result = translator.TranslateStringToItemFilterScript(testInputScript);
@@ -389,21 +393,18 @@ namespace Filtration.Parser.Tests.Services
             Assert.AreEqual("My Block Group", secondBlock.BlockGroup.GroupName);
         }
 
-        private class ItemFilterScriptTranslatorTestUtility
+        private ItemFilterScriptTranslator CreateItemFilterScriptTranslator(IBlockGroupHierarchyBuilder blockGroupHierarchyBuilder = null,
+                                                                            IItemFilterBlockTranslator itemFilterBlockTranslator = null,
+                                                                            IItemFilterScriptFactory itemFilterScriptFactory = null)
         {
-            public ItemFilterScriptTranslatorTestUtility()
-            {
-                // Mock setups
-                MockItemFilterBlockTranslator = new Mock<IItemFilterBlockTranslator>();
-                MockBlockGroupHierarchyBuilder = new Mock<IBlockGroupHierarchyBuilder>();
+            var mockItemFilterScriptFactory = new Mock<IItemFilterScriptFactory>();
+            mockItemFilterScriptFactory
+                .Setup(i => i.Create())
+                .Returns(new ItemFilterScript());
 
-                // Class under test instantiation
-                ScriptTranslator = new ItemFilterScriptTranslator(MockItemFilterBlockTranslator.Object, MockBlockGroupHierarchyBuilder.Object);
-            }
-
-            public ItemFilterScriptTranslator ScriptTranslator { get; }
-            public Mock<IItemFilterBlockTranslator> MockItemFilterBlockTranslator { get; }
-            public Mock<IBlockGroupHierarchyBuilder> MockBlockGroupHierarchyBuilder { get; }
+            return new ItemFilterScriptTranslator(blockGroupHierarchyBuilder ?? new Mock<IBlockGroupHierarchyBuilder>().Object,
+                                                  itemFilterBlockTranslator ?? new Mock<IItemFilterBlockTranslator>().Object,
+                                                  itemFilterScriptFactory ?? mockItemFilterScriptFactory.Object);
         }
     }
 }
diff --git a/Filtration.Parser/Services/ItemFilterScriptTranslator.cs b/Filtration.Parser/Services/ItemFilterScriptTranslator.cs
index e420c33..2e214a3 100644
--- a/Filtration.Parser/Services/ItemFilterScriptTranslator.cs
+++ b/Filtration.Parser/Services/ItemFilterScriptTranslator.cs
@@ -6,6 +6,7 @@ using System.Runtime.InteropServices;
 using System.Text.RegularExpressions;
 using Filtration.Common.Utilities;
 using Filtration.ObjectModel;
+using Filtration.ObjectModel.Factories;
 using Filtration.Parser.Interface.Services;
 using Filtration.Properties;
 
@@ -35,13 +36,16 @@ namespace Filtration.Parser.Services
     internal class ItemFilterScriptTranslator : IItemFilterScriptTranslator
     {
         private readonly IItemFilterBlockTranslator _blockTranslator;
+        private readonly IItemFilterScriptFactory _itemFilterScriptFactory;
         private readonly IBlockGroupHierarchyBuilder _blockGroupHierarchyBuilder;
 
-        public ItemFilterScriptTranslator(IItemFilterBlockTranslator blockTranslator,
-                                          IBlockGroupHierarchyBuilder blockGroupHierarchyBuilder)
+        public ItemFilterScriptTranslator(IBlockGroupHierarchyBuilder blockGroupHierarchyBuilder,
+                                          IItemFilterBlockTranslator blockTranslator,
+                                          IItemFilterScriptFactory itemFilterScriptFactory)
         {
-            _blockTranslator = blockTranslator;
             _blockGroupHierarchyBuilder = blockGroupHierarchyBuilder;
+            _blockTranslator = blockTranslator;
+            _itemFilterScriptFactory = itemFilterScriptFactory;
         }
 
         public static string PreprocessDisabledBlocks(string inputString)
@@ -104,9 +108,9 @@ namespace Filtration.Parser.Services
             return lines.Aggregate((c, n) => c + Environment.NewLine + n);
         }
 
-        public ItemFilterScript TranslateStringToItemFilterScript(string inputString)
+        public IItemFilterScript TranslateStringToItemFilterScript(string inputString)
         {
-            var script = new ItemFilterScript();
+            var script = _itemFilterScriptFactory.Create();
             _blockGroupHierarchyBuilder.Initialise(script.ItemFilterBlockGroups.First());
 
             inputString = inputString.Replace("\t", "");
@@ -224,7 +228,7 @@ namespace Filtration.Parser.Services
             return blockBoundaries;
         }
 
-        public string TranslateItemFilterScriptToString(ItemFilterScript script)
+        public string TranslateItemFilterScriptToString(IItemFilterScript script)
         {
             var outputString = string.Empty;
 
diff --git a/Filtration.Tests/Repositories/TestItemFilterScriptRepository.cs b/Filtration.Tests/Repositories/TestItemFilterScriptRepository.cs
index 5563451..4f6097a 100644
--- a/Filtration.Tests/Repositories/TestItemFilterScriptRepository.cs
+++ b/Filtration.Tests/Repositories/TestItemFilterScriptRepository.cs
@@ -2,6 +2,7 @@
 using System.IO;
 using System.Threading.Tasks;
 using Filtration.ObjectModel;
+using Filtration.ObjectModel.Factories;
 using Filtration.Repositories;
 using Filtration.Services;
 using Filtration.ViewModels;
@@ -29,7 +30,8 @@ namespace Filtration.Tests.Repositories
             var mockItemFilterScriptViewModelFactory = new Mock<IItemFilterScriptViewModelFactory>();
             mockItemFilterScriptViewModelFactory.Setup(f => f.Create()).Returns(mockItemFilterScriptViewModel.Object);
 
-            var repository = new ItemFilterScriptRepository(mockPersistenceService.Object, mockItemFilterScriptViewModelFactory.Object);
+            var repository = CreateItemFilterScriptRepository(itemFilterPersistenceService: mockPersistenceService.Object,
+                                                              itemFilterScriptViewModelFactory: mockItemFilterScriptViewModelFactory.Object);
 
             // Act
             var result = await repository.LoadScriptFromFileAsync(testInputPath);
@@ -50,7 +52,8 @@ namespace Filtration.Tests.Repositories
 
             var mockItemFilterScriptViewModelFactory = new Mock<IItemFilterScriptViewModelFactory>();
 
-            var repository = new ItemFilterScriptRepository(mockPersistenceService.Object, mockItemFilterScriptViewModelFactory.Object);
+            var repository = CreateItemFilterScriptRepository(itemFilterPersistenceService: mockPersistenceService.Object,
+                                                              itemFilterScriptViewModelFactory: mockItemFilterScriptViewModelFactory.Object);
 
             // Act
             Func<Task<IItemFilterScriptViewModel>> result = async () => await repository.LoadScriptFromFileAsync(testInputPath);
@@ -70,7 +73,8 @@ namespace Filtration.Tests.Repositories
 
             var mockItemFilterScriptViewModelFactory = new Mock<IItemFilterScriptViewModelFactory>();
 
-            var repository = new ItemFilterScriptRepository(mockPersistenceService.Object, mockItemFilterScriptViewModelFactory.Object);
+            var repository = CreateItemFilterScriptRepository(itemFilterPersistenceService: mockPersistenceService.Object,
+                                                              itemFilterScriptViewModelFactory: mockItemFilterScriptViewModelFactory.Object);
 
             // Act
             repository.SetItemFilterScriptDirectory(testInputPath);
@@ -90,7 +94,8 @@ namespace Filtration.Tests.Repositories
 
             var mockItemFilterScriptViewModelFactory = new Mock<IItemFilterScriptViewModelFactory>();
 
-            var repository = new ItemFilterScriptRepository(mockPersistenceService.Object, mockItemFilterScriptViewModelFactory.Object);
+            var repository = CreateItemFilterScriptRepository(itemFilterPersistenceService: mockPersistenceService.Object,
+                                                              itemFilterScriptViewModelFactory: mockItemFilterScriptViewModelFactory.Object);
 
             // Act
             string result =  repository.GetItemFilterScriptDirectory();
@@ -111,13 +116,23 @@ namespace Filtration.Tests.Repositories
             var mockItemFilterScriptViewModelFactory = new Mock<IItemFilterScriptViewModelFactory>();
             mockItemFilterScriptViewModelFactory.Setup(f => f.Create()).Returns(mockItemFilterScriptViewModel.Object);
 
-            var repository = new ItemFilterScriptRepository(mockPersistenceService.Object, mockItemFilterScriptViewModelFactory.Object);
-            
+            var repository = CreateItemFilterScriptRepository(itemFilterPersistenceService: mockPersistenceService.Object,
+                                                              itemFilterScriptViewModelFactory: mockItemFilterScriptViewModelFactory.Object);
+
             // Act
             IItemFilterScriptViewModel result = repository.NewScript();
 
             // Assert
             Assert.AreEqual(mockItemFilterScriptViewModel.Object, result);
         }
+
+        private ItemFilterScriptRepository CreateItemFilterScriptRepository(IItemFilterPersistenceService itemFilterPersistenceService = null,
+                                                                            IItemFilterScriptFactory itemFilterScriptFactory = null,
+                                                                            IItemFilterScriptViewModelFactory itemFilterScriptViewModelFactory = null)
+        {
+            return new ItemFilterScriptRepository(itemFilterPersistenceService ?? new Mock<IItemFilterPersistenceService>().Object,
+                                                  itemFilterScriptFactory ?? new Mock<IItemFilterScriptFactory>().Object,
+                                                  itemFilterScriptViewModelFactory ?? new Mock<IItemFilterScriptViewModelFactory>().Object);
+        }
     }
 }
diff --git a/Filtration.ThemeEditor/Providers/ThemeProvider.cs b/Filtration.ThemeEditor/Providers/ThemeProvider.cs
index 9cac475..238c392 100644
--- a/Filtration.ThemeEditor/Providers/ThemeProvider.cs
+++ b/Filtration.ThemeEditor/Providers/ThemeProvider.cs
@@ -11,8 +11,8 @@ namespace Filtration.ThemeEditor.Providers
 {
     public interface IThemeProvider
     {
-        IThemeEditorViewModel NewThemeForScript(ItemFilterScript script);
-        IThemeEditorViewModel MasterThemeForScript(ItemFilterScript script);
+        IThemeEditorViewModel NewThemeForScript(IItemFilterScript script);
+        IThemeEditorViewModel MasterThemeForScript(IItemFilterScript script);
         Task<IThemeEditorViewModel> LoadThemeFromFile(string filePath);
         Task<Theme> LoadThemeModelFromFile(string filePath);
         Task SaveThemeAsync(IThemeEditorViewModel themeEditorViewModel, string filePath);
@@ -29,7 +29,7 @@ namespace Filtration.ThemeEditor.Providers
             _themePersistenceService = themePersistenceService;
         }
 
-        public IThemeEditorViewModel NewThemeForScript(ItemFilterScript script)
+        public IThemeEditorViewModel NewThemeForScript(IItemFilterScript script)
         {
             var themeComponentCollection = script.ThemeComponents.Aggregate(new ThemeComponentCollection(),
                 (c, component) =>
@@ -45,7 +45,7 @@ namespace Filtration.ThemeEditor.Providers
             return themeViewModel;
         }
 
-        public IThemeEditorViewModel MasterThemeForScript(ItemFilterScript script)
+        public IThemeEditorViewModel MasterThemeForScript(IItemFilterScript script)
         {
             var themeViewModel = _themeViewModelFactory.Create();
             themeViewModel.InitialiseForMasterTheme(script);
diff --git a/Filtration.ThemeEditor/Services/ThemeService.cs b/Filtration.ThemeEditor/Services/ThemeService.cs
index 360c24f..6ebaa94 100644
--- a/Filtration.ThemeEditor/Services/ThemeService.cs
+++ b/Filtration.ThemeEditor/Services/ThemeService.cs
@@ -12,7 +12,7 @@ namespace Filtration.ThemeEditor.Services
 {
     public interface IThemeService
     {
-        void ApplyThemeToScript(Theme theme, ItemFilterScript script);
+        void ApplyThemeToScript(Theme theme, IItemFilterScript script);
     }
 
     public class ThemeService : IThemeService
@@ -24,7 +24,7 @@ namespace Filtration.ThemeEditor.Services
             _messageBoxService = messageBoxService;
         }
 
-        public void ApplyThemeToScript(Theme theme, ItemFilterScript script)
+        public void ApplyThemeToScript(Theme theme, IItemFilterScript script)
         {
             var mismatchedComponents = false;
             foreach (var component in theme.Components)
diff --git a/Filtration.ThemeEditor/ViewModels/ThemeEditorViewModel.cs b/Filtration.ThemeEditor/ViewModels/ThemeEditorViewModel.cs
index dfb0490..ab9f796 100644
--- a/Filtration.ThemeEditor/ViewModels/ThemeEditorViewModel.cs
+++ b/Filtration.ThemeEditor/ViewModels/ThemeEditorViewModel.cs
@@ -26,9 +26,9 @@ namespace Filtration.ThemeEditor.ViewModels
         RelayCommand CloseCommand { get; }
 
         void InitialiseForNewTheme(ThemeComponentCollection themeComponentCollection);
-        void InitialiseForMasterTheme(ItemFilterScript script);
+        void InitialiseForMasterTheme(IItemFilterScript script);
         bool IsMasterTheme { get; }
-        ItemFilterScript IsMasterThemeForScript { get; }
+        IItemFilterScript IsMasterThemeForScript { get; }
         string Title { get; }
         string FilePath { get; set; }
         string Filename { get; }
@@ -72,7 +72,7 @@ namespace Filtration.ThemeEditor.ViewModels
 
         public bool IsMasterTheme => Components.IsMasterCollection;
 
-        public ItemFilterScript IsMasterThemeForScript { get; private set; }
+        public IItemFilterScript IsMasterThemeForScript { get; private set; }
 
         public void InitialiseForNewTheme(ThemeComponentCollection themeComponentCollection)
         {
@@ -80,7 +80,7 @@ namespace Filtration.ThemeEditor.ViewModels
             _filenameIsFake = true;
         }
 
-        public void InitialiseForMasterTheme(ItemFilterScript script)
+        public void InitialiseForMasterTheme(IItemFilterScript script)
         {
             Components = script.ThemeComponents;
             IsMasterThemeForScript = script;
diff --git a/Filtration.sln.DotSettings b/Filtration.sln.DotSettings
index c7dfe84..c6806ba 100644
--- a/Filtration.sln.DotSettings
+++ b/Filtration.sln.DotSettings
@@ -1,4 +1,5 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
 	<s:Boolean x:Key="/Default/CodeInspection/CodeAnnotations/NamespacesWithAnnotations/=Filtration_002EAnnotations/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/CodeInspection/CodeAnnotations/NamespacesWithAnnotations/=Filtration_002EObjectModel_002EAnnotations/@EntryIndexedValue">True</s:Boolean>
 	<s:String x:Key="/Default/FilterSettingsManager/AttributeFilterXml/@EntryValue">&lt;data /&gt;</s:String>
 	<s:String x:Key="/Default/FilterSettingsManager/CoverageFilterXml/@EntryValue">&lt;data&gt;&lt;IncludeFilters /&gt;&lt;ExcludeFilters&gt;&lt;Filter ModuleMask="Filtration.ItemFilterPreview.Tests" ModuleVersionMask="*" ClassMask="*" FunctionMask="*" IsEnabled="True" /&gt;&lt;Filter ModuleMask="Filtration.ObjectModel.Tests" ModuleVersionMask="*" ClassMask="*" FunctionMask="*" IsEnabled="True" /&gt;&lt;Filter ModuleMask="Filtration.ThemeEditor.Tests" ModuleVersionMask="*" ClassMask="*" FunctionMask="*" IsEnabled="True" /&gt;&lt;Filter ModuleMask="Filtration.Tests" ModuleVersionMask="*" ClassMask="*" FunctionMask="*" IsEnabled="True" /&gt;&lt;/ExcludeFilters&gt;&lt;/data&gt;</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/Filtration/Repositories/ItemFilterScriptRepository.cs b/Filtration/Repositories/ItemFilterScriptRepository.cs
index e119daa..c50a9b2 100644
--- a/Filtration/Repositories/ItemFilterScriptRepository.cs
+++ b/Filtration/Repositories/ItemFilterScriptRepository.cs
@@ -1,5 +1,6 @@
 using System.Threading.Tasks;
 using Filtration.ObjectModel;
+using Filtration.ObjectModel.Factories;
 using Filtration.Services;
 using Filtration.ViewModels;
 
@@ -16,12 +17,15 @@ namespace Filtration.Repositories
     internal class ItemFilterScriptRepository : IItemFilterScriptRepository
     {
         private readonly IItemFilterPersistenceService _itemFilterPersistenceService;
+        private readonly IItemFilterScriptFactory _itemFilterScriptFactory;
         private readonly IItemFilterScriptViewModelFactory _itemFilterScriptViewModelFactory;
 
         public ItemFilterScriptRepository(IItemFilterPersistenceService itemFilterPersistenceService,
+                                          IItemFilterScriptFactory itemFilterScriptFactory,
                                           IItemFilterScriptViewModelFactory itemFilterScriptViewModelFactory)
         {
             _itemFilterPersistenceService = itemFilterPersistenceService;
+            _itemFilterScriptFactory = itemFilterScriptFactory;
             _itemFilterScriptViewModelFactory = itemFilterScriptViewModelFactory;
         }
 
@@ -37,7 +41,7 @@ namespace Filtration.Repositories
 
         public IItemFilterScriptViewModel NewScript()
         {
-            var newScript = new ItemFilterScript();
+            var newScript = _itemFilterScriptFactory.Create();
             var newViewModel = _itemFilterScriptViewModelFactory.Create();
             newViewModel.Initialise(newScript, true);
 
diff --git a/Filtration/Services/ItemFilterPersistenceService.cs b/Filtration/Services/ItemFilterPersistenceService.cs
index 27646ec..14cd9dc 100644
--- a/Filtration/Services/ItemFilterPersistenceService.cs
+++ b/Filtration/Services/ItemFilterPersistenceService.cs
@@ -11,8 +11,8 @@ namespace Filtration.Services
     {
         void SetItemFilterScriptDirectory(string path);
         string ItemFilterScriptDirectory { get; }
-        Task<ItemFilterScript> LoadItemFilterScriptAsync(string filePath);
-        Task SaveItemFilterScriptAsync(ItemFilterScript script);
+        Task<IItemFilterScript> LoadItemFilterScriptAsync(string filePath);
+        Task SaveItemFilterScriptAsync(IItemFilterScript script);
         string DefaultPathOfExileDirectory();
     }
 
@@ -59,9 +59,9 @@ namespace Filtration.Services
             Settings.Default.DefaultFilterDirectory = path;
         }
 
-        public async Task<ItemFilterScript> LoadItemFilterScriptAsync(string filePath)
+        public async Task<IItemFilterScript> LoadItemFilterScriptAsync(string filePath)
         {
-            ItemFilterScript loadedScript = null;
+            IItemFilterScript loadedScript = null;
             await Task.Run(() =>
             {
                 loadedScript = _itemFilterScriptTranslator.TranslateStringToItemFilterScript(
@@ -76,7 +76,7 @@ namespace Filtration.Services
             return loadedScript;
         }
 
-        public async Task SaveItemFilterScriptAsync(ItemFilterScript script)
+        public async Task SaveItemFilterScriptAsync(IItemFilterScript script)
         {
             await Task.Run(() =>
             {
diff --git a/Filtration/ViewModels/ItemFilterScriptViewModel.cs b/Filtration/ViewModels/ItemFilterScriptViewModel.cs
index 2c589cc..1435f70 100644
--- a/Filtration/ViewModels/ItemFilterScriptViewModel.cs
+++ b/Filtration/ViewModels/ItemFilterScriptViewModel.cs
@@ -25,7 +25,7 @@ namespace Filtration.ViewModels
 {
     internal interface IItemFilterScriptViewModel : IEditableDocument
     {
-        ItemFilterScript Script { get; }
+        IItemFilterScript Script { get; }
         IItemFilterBlockViewModelBase SelectedBlockViewModel { get; set; }
         IItemFilterCommentBlockViewModel CommentBlockBrowserBrowserSelectedBlockViewModel { get; set; }
         IEnumerable<IItemFilterCommentBlockViewModel> ItemFilterCommentBlockViewModels { get; }
@@ -35,7 +35,7 @@ namespace Filtration.ViewModels
         string Description { get; set; }
         string DisplayName { get; }
         
-        void Initialise(ItemFilterScript itemFilterScript, bool newScript);
+        void Initialise(IItemFilterScript itemFilterScript, bool newScript);
         void RemoveDirtyFlag();
         void SetDirtyFlag();
         bool HasSelectedEnabledBlock();
@@ -294,7 +294,7 @@ namespace Filtration.ViewModels
             }
         }
 
-        public ItemFilterScript Script { get; private set; }
+        public IItemFilterScript Script { get; private set; }
 
         public bool IsDirty
         {
@@ -341,7 +341,7 @@ namespace Filtration.ViewModels
         private bool _filenameIsFake;
         private bool _showAdvanced;
 
-        public void Initialise(ItemFilterScript itemFilterScript, bool newScript)
+        public void Initialise(IItemFilterScript itemFilterScript, bool newScript)
         {
             ItemFilterBlockViewModels.Clear();
 
diff --git a/Filtration/ViewModels/ReplaceColorsViewModel.cs b/Filtration/ViewModels/ReplaceColorsViewModel.cs
index 8c4b77e..a9dc2e7 100644
--- a/Filtration/ViewModels/ReplaceColorsViewModel.cs
+++ b/Filtration/ViewModels/ReplaceColorsViewModel.cs
@@ -1,7 +1,6 @@
 using System.Collections.ObjectModel;
 using System.Linq;
 using System.Windows.Media;
-using Filtration.Common.ViewModels;
 using Filtration.ObjectModel;
 using Filtration.ObjectModel.BlockItemTypes;
 using Filtration.Views;
@@ -13,13 +12,13 @@ namespace Filtration.ViewModels
 {
     internal interface IReplaceColorsViewModel
     {
-        void Initialise(ItemFilterScript itemFilterScript, IItemFilterBlock initialiseFromBlock);
-        void Initialise(ItemFilterScript itemFilterScript);
+        void Initialise(IItemFilterScript itemFilterScript, IItemFilterBlock initialiseFromBlock);
+        void Initialise(IItemFilterScript itemFilterScript);
     }
 
     internal class ReplaceColorsViewModel : ViewModelBase, IReplaceColorsViewModel
     {
-        private ItemFilterScript _itemFilterScript;
+        private IItemFilterScript _itemFilterScript;
         private ReplaceColorsParameterSet _replaceColorsParameterSet;
 
         public ReplaceColorsViewModel()
@@ -29,7 +28,7 @@ namespace Filtration.ViewModels
 
         public RelayCommand ReplaceColorsCommand { get; private set; }
 
-        public void Initialise(ItemFilterScript itemFilterScript, IItemFilterBlock initialiseFromBlock)
+        public void Initialise(IItemFilterScript itemFilterScript, IItemFilterBlock initialiseFromBlock)
         {
             _replaceColorsParameterSet = new ReplaceColorsParameterSet();
 
@@ -67,7 +66,7 @@ namespace Filtration.ViewModels
 
         public Color NewTextColor
         {
-            get { return _replaceColorsParameterSet.NewTextColor; }
+            get => _replaceColorsParameterSet.NewTextColor;
             set
             {
                 _replaceColorsParameterSet.NewTextColor = value;
@@ -82,7 +81,7 @@ namespace Filtration.ViewModels
 
         public bool ReplaceTextColor
         {
-            get { return _replaceColorsParameterSet.ReplaceTextColor; }
+            get => _replaceColorsParameterSet.ReplaceTextColor;
             set
             {
                 _replaceColorsParameterSet.ReplaceTextColor = value;
@@ -92,7 +91,7 @@ namespace Filtration.ViewModels
 
         public Color NewBackgroundColor
         {
-            get { return _replaceColorsParameterSet.NewBackgroundColor; }
+            get => _replaceColorsParameterSet.NewBackgroundColor;
             set
             {
                 _replaceColorsParameterSet.NewBackgroundColor = value;
@@ -107,7 +106,7 @@ namespace Filtration.ViewModels
 
         public bool ReplaceBackgroundColor
         {
-            get { return _replaceColorsParameterSet.ReplaceBackgroundColor; }
+            get => _replaceColorsParameterSet.ReplaceBackgroundColor;
             set
             {
                 _replaceColorsParameterSet.ReplaceBackgroundColor = value;
@@ -117,7 +116,7 @@ namespace Filtration.ViewModels
 
         public Color NewBorderColor
         {
-            get { return _replaceColorsParameterSet.NewBorderColor; }
+            get => _replaceColorsParameterSet.NewBorderColor;
             set
             {
                 _replaceColorsParameterSet.NewBorderColor = value;
@@ -132,7 +131,7 @@ namespace Filtration.ViewModels
 
         public bool ReplaceBorderColor
         {
-            get { return _replaceColorsParameterSet.ReplaceBorderColor; }
+            get => _replaceColorsParameterSet.ReplaceBorderColor;
             set
             {
                 _replaceColorsParameterSet.ReplaceBorderColor = value;
@@ -142,7 +141,7 @@ namespace Filtration.ViewModels
 
         public ReplaceColorsParameterSet ReplaceColorsParameterSet => _replaceColorsParameterSet;
 
-        public void Initialise(ItemFilterScript itemFilterScript)
+        public void Initialise(IItemFilterScript itemFilterScript)
         {
             _replaceColorsParameterSet = new ReplaceColorsParameterSet();
             _itemFilterScript = itemFilterScript;
diff --git a/Filtration/Views/ItemFilterScriptView.xaml b/Filtration/Views/ItemFilterScriptView.xaml
index 3fd14bd..f258054 100644
--- a/Filtration/Views/ItemFilterScriptView.xaml
+++ b/Filtration/Views/ItemFilterScriptView.xaml
@@ -17,9 +17,9 @@
         <KeyBinding Command="{Binding CopyBlockStyleCommand}" Modifiers="Shift+Control" Key="C" />
         <KeyBinding Command="{Binding PasteBlockStyleCommand}" Modifiers="Shift+Control" Key="V" />
     </UserControl.InputBindings>
-    <utility:RoutedCommandHandlers.Commands>
+    <!--<utility:RoutedCommandHandlers.Commands>
         <utility:RoutedCommandHandler RoutedCommand="{StaticResource MoveBlockUpRoutedCommand}" Command="{Binding MoveBlockUpCommand}" IsActive="{Binding IsActiveDocument}" />
-    </utility:RoutedCommandHandlers.Commands>
+    </utility:RoutedCommandHandlers.Commands>-->
     <UserControl.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
@@ -42,7 +42,6 @@
         </Grid.RowDefinitions>
         <Border Grid.Row="0" BorderThickness="1" BorderBrush="DarkGray"  Margin="5,5,5,0">
             <StackPanel Margin="2,2,2,2">
-                <Button Command="{StaticResource MoveBlockUpRoutedCommand}">MOVE BLOCK UP TEST BUTTON</Button>
                 <Expander Style="{StaticResource ExpanderRightAlignStyle}">
                     <Expander.Header>
                         <TextBlock Text="Script Description" VerticalAlignment="Center" />
diff --git a/Filtration/Views/StartPageView.xaml b/Filtration/Views/StartPageView.xaml
index 150334c..8e3793c 100644
--- a/Filtration/Views/StartPageView.xaml
+++ b/Filtration/Views/StartPageView.xaml
@@ -8,7 +8,7 @@
     <Grid>
         <TextBlock FontStyle="Italic" Margin="5" FontSize="13">
             Welcome to Filtration, to get started either 
-            <Hyperlink Command="{Binding NewScriptCommand}">create a new script</Hyperlink> or <Hyperlink Command="{StaticResource OpenScriptRoutedCommand}">open an existing script</Hyperlink>
+            <Hyperlink Command="{Binding NewScriptCommand}">create a new script</Hyperlink> or <Hyperlink Command="{Binding OpenScriptCommand}">open an existing script</Hyperlink>
         </TextBlock>
     </Grid>
 </UserControl>