[Xaml] decorate markup and value providers to speed up inflating (#770)

* [Xaml] decorate markup and value providers to speed up inflating

* update docs

* fix docs

13 files changed, 28 insertions, 1 deletions

diff --git a/Xamarin.Forms.Core/Interactivity/BindingCondition.cs b/Xamarin.Forms.Core/Interactivity/BindingCondition.cs
index ccf55e58..0ff9e8fe 100644
--- a/Xamarin.Forms.Core/Interactivity/BindingCondition.cs
+++ b/Xamarin.Forms.Core/Interactivity/BindingCondition.cs
@@ -4,6 +4,7 @@ using Xamarin.Forms.Xaml;
 namespace Xamarin.Forms
 {
 	[ProvideCompiled("Xamarin.Forms.Core.XamlC.PassthroughValueProvider")]
+	[AcceptEmptyServiceProvider]
 	public sealed class BindingCondition : Condition, IValueProvider
 	{
 		readonly BindableProperty _boundProperty;
diff --git a/Xamarin.Forms.Core/Interactivity/DataTrigger.cs b/Xamarin.Forms.Core/Interactivity/DataTrigger.cs
index d90cf44e..0eb45be5 100644
--- a/Xamarin.Forms.Core/Interactivity/DataTrigger.cs
+++ b/Xamarin.Forms.Core/Interactivity/DataTrigger.cs
@@ -6,6 +6,7 @@ namespace Xamarin.Forms
 {
 	[ContentProperty("Setters")]
 	[ProvideCompiled("Xamarin.Forms.Core.XamlC.PassthroughValueProvider")]
+	[AcceptEmptyServiceProvider]
 	public sealed class DataTrigger : TriggerBase, IValueProvider
 	{
 		public DataTrigger([TypeConverter(typeof(TypeTypeConverter))] [Parameter("TargetType")] Type targetType) : base(new BindingCondition(), targetType)
diff --git a/Xamarin.Forms.Pages/DataSourceBindingExtension.cs b/Xamarin.Forms.Pages/DataSourceBindingExtension.cs
index 279240e7..0b07476b 100644
--- a/Xamarin.Forms.Pages/DataSourceBindingExtension.cs
+++ b/Xamarin.Forms.Pages/DataSourceBindingExtension.cs
@@ -4,6 +4,7 @@ using Xamarin.Forms.Xaml;
 namespace Xamarin.Forms.Pages
 {
 	[ContentProperty("Path")]
+	[AcceptEmptyServiceProvider]
 	public sealed class DataSourceBindingExtension : IMarkupExtension<BindingBase>
 	{
 		public DataSourceBindingExtension()
diff --git a/Xamarin.Forms.Xaml/MarkupExtensions/ArrayExtension.cs b/Xamarin.Forms.Xaml/MarkupExtensions/ArrayExtension.cs
index 9f594132..80c4f825 100644
--- a/Xamarin.Forms.Xaml/MarkupExtensions/ArrayExtension.cs
+++ b/Xamarin.Forms.Xaml/MarkupExtensions/ArrayExtension.cs
@@ -5,6 +5,7 @@ using System.Collections.Generic;
 namespace Xamarin.Forms.Xaml
 {
 	[ContentProperty("Items")]
+	[AcceptEmptyServiceProvider]
 	public class ArrayExtension : IMarkupExtension<Array>
 	{
 		public ArrayExtension()
diff --git a/Xamarin.Forms.Xaml/MarkupExtensions/BindingExtension.cs b/Xamarin.Forms.Xaml/MarkupExtensions/BindingExtension.cs
index df82771d..d3d5a519 100644
--- a/Xamarin.Forms.Xaml/MarkupExtensions/BindingExtension.cs
+++ b/Xamarin.Forms.Xaml/MarkupExtensions/BindingExtension.cs
@@ -4,6 +4,7 @@ using Xamarin.Forms.Internals;
 namespace Xamarin.Forms.Xaml
 {
 	[ContentProperty("Path")]
+	[AcceptEmptyServiceProvider]
 	public sealed class BindingExtension : IMarkupExtension<BindingBase>
 	{
 		public BindingExtension()
diff --git a/Xamarin.Forms.Xaml/MarkupExtensions/NullExtension.cs b/Xamarin.Forms.Xaml/MarkupExtensions/NullExtension.cs
index 6bdab684..4ce40ae6 100644
--- a/Xamarin.Forms.Xaml/MarkupExtensions/NullExtension.cs
+++ b/Xamarin.Forms.Xaml/MarkupExtensions/NullExtension.cs
@@ -3,6 +3,7 @@
 namespace Xamarin.Forms.Xaml
 {
 	[ProvideCompiled("Xamarin.Forms.Build.Tasks.NullExtension")]
+	[AcceptEmptyServiceProvider]
 	public class NullExtension : IMarkupExtension
 	{
 		public object ProvideValue(IServiceProvider serviceProvider)
@@ -10,4 +11,4 @@ namespace Xamarin.Forms.Xaml
 			return null;
 		}
 	}
-}
\ No newline at end of file
+}
diff --git a/Xamarin.Forms.Xaml/MarkupExtensions/TemplateBindingExtension.cs b/Xamarin.Forms.Xaml/MarkupExtensions/TemplateBindingExtension.cs
index c14f9f94..cc0dfd74 100644
--- a/Xamarin.Forms.Xaml/MarkupExtensions/TemplateBindingExtension.cs
+++ b/Xamarin.Forms.Xaml/MarkupExtensions/TemplateBindingExtension.cs
@@ -3,6 +3,7 @@ using System;
 namespace Xamarin.Forms.Xaml
 {
 	[ContentProperty("Path")]
+	[AcceptEmptyServiceProvider]
 	public sealed class TemplateBindingExtension : IMarkupExtension<BindingBase>
 	{
 		public TemplateBindingExtension()
diff --git a/docs/Xamarin.Forms.Core/Xamarin.Forms/BindingCondition.xml b/docs/Xamarin.Forms.Core/Xamarin.Forms/BindingCondition.xml
index b88d3135..ddebc6dc 100644
--- a/docs/Xamarin.Forms.Core/Xamarin.Forms/BindingCondition.xml
+++ b/docs/Xamarin.Forms.Core/Xamarin.Forms/BindingCondition.xml
@@ -16,6 +16,11 @@
       <InterfaceName>Xamarin.Forms.Xaml.IValueProvider</InterfaceName>
     </Interface>
   </Interfaces>
+  <Attributes>
+    <Attribute>
+      <AttributeName>Xamarin.Forms.Xaml.AcceptEmptyServiceProvider</AttributeName>
+    </Attribute>
+  </Attributes>
   <Docs>
     <summary>Class that represents a value comparison with the target of an arbitrary binding.</summary>
     <remarks>To be added.</remarks>
diff --git a/docs/Xamarin.Forms.Core/Xamarin.Forms/DataTrigger.xml b/docs/Xamarin.Forms.Core/Xamarin.Forms/DataTrigger.xml
index 39337fe0..e5758fc9 100644
--- a/docs/Xamarin.Forms.Core/Xamarin.Forms/DataTrigger.xml
+++ b/docs/Xamarin.Forms.Core/Xamarin.Forms/DataTrigger.xml
@@ -20,6 +20,9 @@
     <Attribute>
       <AttributeName>Xamarin.Forms.ContentProperty("Setters")</AttributeName>
     </Attribute>
+    <Attribute>
+      <AttributeName>Xamarin.Forms.Xaml.AcceptEmptyServiceProvider</AttributeName>
+    </Attribute>
   </Attributes>
   <Docs>
     <summary>Class that represents a binding condition and a list of <see cref="T:Xamarin.Forms.Setter" /> objects that will be applied when the condition is met.</summary>
diff --git a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/ArrayExtension.xml b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/ArrayExtension.xml
index 91d847df..95e1fa38 100644
--- a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/ArrayExtension.xml
+++ b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/ArrayExtension.xml
@@ -22,6 +22,9 @@
     <Attribute>
       <AttributeName>Xamarin.Forms.ContentProperty("Items")</AttributeName>
     </Attribute>
+    <Attribute>
+      <AttributeName>Xamarin.Forms.Xaml.AcceptEmptyServiceProvider</AttributeName>
+    </Attribute>
   </Attributes>
   <Docs>
     <summary>For internal use by the XAML infrastructure.</summary>
diff --git a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/BindingExtension.xml b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/BindingExtension.xml
index 40123d08..c210c3a7 100644
--- a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/BindingExtension.xml
+++ b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/BindingExtension.xml
@@ -19,6 +19,9 @@
     <Attribute>
       <AttributeName>Xamarin.Forms.ContentProperty("Path")</AttributeName>
     </Attribute>
+    <Attribute>
+      <AttributeName>Xamarin.Forms.Xaml.AcceptEmptyServiceProvider</AttributeName>
+    </Attribute>
   </Attributes>
   <Docs>
     <summary>For internal use by the XAML infrastructure.</summary>
diff --git a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/NullExtension.xml b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/NullExtension.xml
index 9fd2b700..3116afda 100644
--- a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/NullExtension.xml
+++ b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/NullExtension.xml
@@ -20,6 +20,9 @@
   </Interfaces>
   <Attributes>
     <Attribute>
+      <AttributeName>Xamarin.Forms.Xaml.AcceptEmptyServiceProvider</AttributeName>
+    </Attribute>
+    <Attribute>
       <AttributeName>Xamarin.Forms.Xaml.ProvideCompiled("Xamarin.Forms.Build.Tasks.NullExtension")</AttributeName>
     </Attribute>
   </Attributes>
diff --git a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/TemplateBindingExtension.xml b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/TemplateBindingExtension.xml
index c546ecec..024392be 100644
--- a/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/TemplateBindingExtension.xml
+++ b/docs/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml/TemplateBindingExtension.xml
@@ -17,6 +17,9 @@
     <Attribute>
       <AttributeName>Xamarin.Forms.ContentProperty("Path")</AttributeName>
     </Attribute>
+    <Attribute>
+      <AttributeName>Xamarin.Forms.Xaml.AcceptEmptyServiceProvider</AttributeName>
+    </Attribute>
   </Attributes>
   <Docs>
     <summary>For internal use by the XAML infrastructure.</summary>