Styley culture.

Perspex.UnitTests/Perspex.UnitTests.csproj

@@ -35,6 +35,9 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Splat">
+      <HintPath>..\packages\Splat.1.1.1\lib\Net45\Splat.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Reactive.Core, Version=2.1.30214.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>

Perspex.UnitTests/StyleTests.cs

@@ -15,18 +15,33 @@ namespace Perspex.UnitTests
     public class StyleTests
     {
         [TestMethod]
-        public void Style_Should_Update_And_Restore_Value()
+        public void Style_With_Only_Type_Selector_Should_Update_Value()
         {
-            Style style = new Style
+            Style style = new Style(x => x.Select<TextBlock>())
             {
-                Selector = x => x.Select<TextBlock>().Class("foo"),
                 Setters = new[]
                 {
-                    new Setter
-                    {
-                        Property = TextBlock.TextProperty,
-                        Value = "Foo",
-                    }
+                    new Setter(TextBlock.TextProperty, "Foo"),
+                },
+            };
+
+            TextBlock textBlock = new TextBlock
+            {
+                Text = "Original",
+            };
+
+            style.Attach(textBlock);
+            Assert.AreEqual("Foo", textBlock.Text);
+        }
+
+        [TestMethod]
+        public void Style_With_Class_Selector_Should_Update_And_Restore_Value()
+        {
+            Style style = new Style(x => x.Select<TextBlock>().Class("foo"))
+            {
+                Setters = new[]
+                {
+                    new Setter(TextBlock.TextProperty, "Foo"),
                 },
             };
 
@@ -46,29 +61,19 @@ namespace Perspex.UnitTests
         [TestMethod]
         public void Later_Styles_Should_Override_Earlier()
         {
-            Style style1 = new Style
+            Style style1 = new Style(x => x.Select<TextBlock>().Class("foo"))
             {
-                Selector = x => x.Select<TextBlock>().Class("foo"),
                 Setters = new[]
                 {
-                    new Setter
-                    {
-                        Property = TextBlock.TextProperty,
-                        Value = "Foo",
-                    }
+                    new Setter(TextBlock.TextProperty, "Foo"),
                 },
             };
 
-            Style style2 = new Style
+            Style style2 = new Style(x => x.Select<TextBlock>().Class("foo"))
             {
-                Selector = x => x.Select<TextBlock>().Class("foo"),
                 Setters = new[]
                 {
-                    new Setter
-                    {
-                        Property = TextBlock.TextProperty,
-                        Value = "Bar",
-                    }
+                    new Setter(TextBlock.TextProperty, "Bar"),
                 },
             };
 

Perspex.UnitTests/packages.config

@@ -3,4 +3,5 @@
   <package id="Rx-Core" version="2.1.30214.0" targetFramework="net45" />
   <package id="Rx-Interfaces" version="2.1.30214.0" targetFramework="net45" />
   <package id="Rx-Linq" version="2.1.30214.0" targetFramework="net45" />
+  <package id="Splat" version="1.1.1" targetFramework="net45" />
 </packages>

Perspex.Windows/Perspex.Windows.csproj

@@ -39,6 +39,9 @@
     <Reference Include="SharpDX.DXGI">
       <HintPath>..\packages\SharpDX.DXGI.2.5.0\lib\net40\SharpDX.DXGI.dll</HintPath>
     </Reference>
+    <Reference Include="Splat">
+      <HintPath>..\packages\Splat.1.1.1\lib\Net45\Splat.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />

Perspex.Windows/packages.config

@@ -8,5 +8,6 @@
   <package id="SharpDX" version="2.5.0" targetFramework="net45" />
   <package id="SharpDX.Direct2D1" version="2.5.0" targetFramework="net45" />
   <package id="SharpDX.DXGI" version="2.5.0" targetFramework="net45" />
+  <package id="Splat" version="1.1.1" targetFramework="net45" />
   <package id="StyleCop.MSBuild" version="4.7.46.0" targetFramework="net45" />
 </packages>

Perspex/IBindingDescription.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Perspex
+{
+    public interface IBindingDescription
+    {
+        string Description { get; }
+    }
+}

Perspex/Match.cs

@@ -28,5 +28,18 @@ namespace Perspex
             get;
             set;
         }
+
+        public string Token
+        {
+            get;
+            set;
+        }
+
+        public override string ToString()
+        {
+            string result = (this.Previous != null) ? this.Previous.ToString() : string.Empty;
+            result += this.Token;
+            return result;
+        }
     }
 }

Perspex/Perspex.csproj

@@ -76,6 +76,7 @@
     <Compile Include="Controls\ContentControl.cs" />
     <Compile Include="Controls\Control.cs" />
     <Compile Include="Controls\TextBlock.cs" />
+    <Compile Include="IBindingDescription.cs" />
     <Compile Include="Layout\ILayoutable.cs" />
     <Compile Include="Layout\ILayoutManager.cs" />
     <Compile Include="Layout\ILayoutRoot.cs" />
@@ -108,6 +109,9 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
+    <Reference Include="Splat">
+      <HintPath>..\packages\Splat.1.1.1\lib\Portable-Net45+WinRT45+WP8\Splat.dll</HintPath>
+    </Reference>
     <Reference Include="System.Reactive.Core">
       <HintPath>..\packages\Rx-Core.2.1.30214.0\lib\Portable-Net45+WinRT45+WP8\System.Reactive.Core.dll</HintPath>
     </Reference>

Perspex/PerspexObject.cs

@@ -14,6 +14,7 @@ namespace Perspex
     using System.Reactive;
     using System.Reactive.Linq;
     using System.Reflection;
+    using Splat;
 
     /// <summary>
     /// An object with <see cref="PerspexProperty"/> support.
@@ -21,7 +22,7 @@ namespace Perspex
     /// <remarks>
     /// This class is analogous to DependencyObject in WPF.
     /// </remarks>
-    public class PerspexObject
+    public class PerspexObject : IEnableLogger
     {
         /// <summary>
         /// The registered properties by type.
@@ -168,6 +169,12 @@ namespace Perspex
             {
                 binding.Dispose.Dispose();
                 this.bindings.Remove(property);
+
+                this.Log().Debug(string.Format(
+                    "Cleared binding on {0}.{1} (#{2:x8})",
+                    this.GetType().Name,
+                    property.Name,
+                    this.GetHashCode()));
             }
         }
 
@@ -177,6 +184,7 @@ namespace Perspex
         /// <param name="property">The property.</param>
         public void ClearValue(PerspexProperty property)
         {
+            // TODO: Implement this by using SetValue(UnsetValue).
             Contract.Requires<NullReferenceException>(property != null);
             this.ClearBinding(property);
             this.values.Remove(property);
@@ -194,6 +202,13 @@ namespace Perspex
             if (this.bindings.TryGetValue(property, out binding))
             {
                 this.bindings.Remove(property);
+                
+                this.Log().Debug(string.Format(
+                    "Extracted binding on {0}.{1} (#{2:x8})",
+                    this.GetType().Name,
+                    property.Name,
+                    this.GetHashCode()));
+
                 return (IObservable<object>)binding.Observable;
             }
             else
@@ -214,6 +229,13 @@ namespace Perspex
             if (this.bindings.TryGetValue(property, out binding))
             {
                 this.bindings.Remove(property);
+
+                this.Log().Debug(string.Format(
+                    "Extracted binding on {0}.{1} (#{2:x8})",
+                    this.GetType().Name,
+                    property.Name,
+                    this.GetHashCode()));
+                
                 return (IObservable<T>)binding.Observable;
             }
             else
@@ -390,6 +412,8 @@ namespace Perspex
             else
             {
                 IObservable<object> observable = value as IObservable<object>;
+                IBindingDescription bindingDescription = value as IBindingDescription;
+                string description = (bindingDescription != null) ? bindingDescription.Description : value.GetType().Name;
 
                 if (observable == null)
                 {
@@ -409,6 +433,13 @@ namespace Perspex
                         this.SetValueImpl(property, x);
                     }),
                 });
+
+                this.Log().Debug(string.Format(
+                    "Bound {0}.{1} (#{2:x8}) to {3}",
+                    this.GetType().Name,
+                    property.Name,
+                    this.GetHashCode(),
+                    description));
             }
         }
 
@@ -500,6 +531,13 @@ namespace Perspex
             {
                 this.values[property] = value;
                 this.RaisePropertyChanged(property, oldValue, value);
+
+                this.Log().Debug(string.Format(
+                    "Set value of {0}.{1} (#{2:x8}) to '{3}'",
+                    this.GetType().Name,
+                    property.Name,
+                    this.GetHashCode(),
+                    value));
             }
         }
 

Perspex/Selectors.cs

@@ -27,6 +27,7 @@ namespace Perspex
                 return new Match
                 {
                     Control = control,
+                    Token = typeof(T).Name,
                 };
             }
             else
@@ -50,27 +51,7 @@ namespace Perspex
                     Control = selector.Control,
                     Observable = match,
                     Previous = selector,
-                };
-            }
-            else
-            {
-                return null;
-            }
-        }
-
-        public static Match PropertyEquals<T>(this Match selector, PerspexProperty<T> property, T value)
-        {
-            Contract.Requires<ArgumentNullException>(property != null);
-
-            if (selector != null)
-            {
-                IObservable<bool> match = selector.Control.GetObservable(property).Select(x => object.Equals(x, value));
-
-                return new Match
-                {
-                    Control = selector.Control,
-                    Observable = match,
-                    Previous = selector,
+                    Token = (name[0] == ':') ? name : '.' + name,
                 };
             }
             else

Perspex/Setter.cs

@@ -38,13 +38,13 @@ namespace Perspex
             set;
         }
 
-        internal Subject CreateSubject(Control control)
+        internal Subject CreateSubject(Control control, string description)
         {
             object oldValue = control.GetValue(this.Property);
-            return new Subject(control, this.Value, oldValue);
+            return new Subject(control, this.Value, oldValue, description);
         }
 
-        internal class Subject : IObservable<object>
+        internal class Subject : IObservable<object>, IBindingDescription
         {
             private Control control;
 
@@ -54,12 +54,19 @@ namespace Perspex
 
             private List<IObserver<object>> observers;
 
-            public Subject(Control control, object onValue, object offValue)
+            public Subject(Control control, object onValue, object offValue, string description)
             {
                 this.control = control;
                 this.onValue = onValue;
                 this.offValue = offValue;
                 this.observers = new List<IObserver<object>>();
+                this.Description = description;
+            }
+
+            public string Description
+            {
+                get;
+                private set;
             }
 
             public IDisposable Subscribe(IObserver<object> observer)

Perspex/Style.cs

@@ -44,6 +44,7 @@ namespace Perspex
 
             if (match != null)
             {
+                string description = "Style " + match.ToString();
                 List<IObservable<bool>> o = new List<IObservable<bool>>();
                 
                 while (match != null)
@@ -60,20 +61,30 @@ namespace Perspex
 
                 foreach (Setter setter in this.Setters)
                 {
-                    Setter.Subject subject = setter.CreateSubject(control);
+                    Setter.Subject subject = setter.CreateSubject(control, description);
                     subjects.Add(subject);
                     control.SetValue(setter.Property, subject);
                 }
 
-                Observable.CombineLatest(o).Subscribe(x =>
+                if (o.Count == 0)
                 {
-                    bool on = x.All(y => y);
-
                     foreach (Setter.Subject subject in subjects)
                     {
-                        subject.Push(on);
+                        subject.Push(true);
                     }
-                });
+                }
+                else
+                {
+                    Observable.CombineLatest(o).Subscribe(x =>
+                    {
+                        bool on = x.All(y => y);
+
+                        foreach (Setter.Subject subject in subjects)
+                        {
+                            subject.Push(on);
+                        }
+                    });
+                }
             }
         }
     }

Perspex/packages.config

@@ -5,5 +5,6 @@
   <package id="Rx-Linq" version="2.1.30214.0" targetFramework="portable-net45+wp80+win" />
   <package id="Rx-Main" version="2.1.30214.0" targetFramework="portable-net45+wp80+win" />
   <package id="Rx-PlatformServices" version="2.1.30214.0" targetFramework="portable-net45+wp80+win" />
+  <package id="Splat" version="1.1.1" targetFramework="portable-net45+win" />
   <package id="StyleCop.MSBuild" version="4.7.46.0" targetFramework="portable-net45+wp80+win" />
 </packages>

TestApplication/Program.cs

@@ -11,14 +11,32 @@ using Perspex.Media;
 using Perspex.Windows;
 using Perspex.Windows.Media;
 using Perspex.Windows.Threading;
+using Splat;
 
 namespace TestApplication
 {
+    class TestLogger : ILogger
+    {
+
+        public LogLevel Level
+        {
+            get;
+            set;
+        }
+
+        public void Write(string message, LogLevel logLevel)
+        {
+            if ((int)logLevel < (int)Level) return;
+            System.Diagnostics.Debug.WriteLine(message);
+        }
+    }
+
     class Program
     {
         static void Main(string[] args)
         {
             ServiceLocator.Register<ITextService>(() => new TextService(new SharpDX.DirectWrite.Factory()));
+            Locator.CurrentMutable.Register(() => new TestLogger(), typeof(ILogger));
 
             Application application = new Application
             {
@@ -30,7 +48,7 @@ namespace TestApplication
                         {
                             new Setter(Button.BackgroundProperty, new SolidColorBrush(0xffdddddd)),
                             new Setter(Button.BorderBrushProperty, new SolidColorBrush(0xff707070)),
-                            new Setter(Button.BorderThicknessProperty, 1),
+                            new Setter(Button.BorderThicknessProperty, 2.0),
                             new Setter(Button.ForegroundProperty, new SolidColorBrush(0xff000000)),
                         },
                     },
@@ -52,8 +70,6 @@ namespace TestApplication
                     Content = "Hello World",
                     HorizontalAlignment = HorizontalAlignment.Center,
                     VerticalAlignment = VerticalAlignment.Center,
-                    BorderThickness = 2,
-                    BorderBrush = new SolidColorBrush(0xff000000),
                 },
             };
 

TestApplication/TestApplication.csproj

@@ -44,6 +44,9 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\SharpDX.DXGI.2.5.0\lib\net40\SharpDX.DXGI.dll</HintPath>
     </Reference>
+    <Reference Include="Splat">
+      <HintPath>..\packages\Splat.1.1.1\lib\Net45\Splat.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />

TestApplication/packages.config

@@ -8,4 +8,5 @@
   <package id="SharpDX" version="2.5.0" targetFramework="net45" />
   <package id="SharpDX.Direct2D1" version="2.5.0" targetFramework="net45" />
   <package id="SharpDX.DXGI" version="2.5.0" targetFramework="net45" />
+  <package id="Splat" version="1.1.1" targetFramework="net45" />
 </packages>

packages/Splat.1.1.1/Splat.1.1.1.nuspec

@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+  <metadata>
+    <id>Splat</id>
+    <version>1.1.1</version>
+    <title>Splat</title>
+    <authors>Paul Betts</authors>
+    <owners>Paul Betts</owners>
+    <licenseUrl>https://github.com/xpaulbettsx/splat/blob/master/COPYING</licenseUrl>
+    <projectUrl>https://github.com/xpaulbettsx/splat</projectUrl>
+    <iconUrl>http://f.cl.ly/items/1307401C3x2g3F2p2Z36/Logo.png</iconUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <description>A library to make things cross-platform that should be</description>
+    <summary>A library to make things cross-platform that should be</summary>
+    <releaseNotes />
+    <copyright />
+    <language />
+    <tags>portable</tags>
+  </metadata>
+</package>