[Xaml] support CDATA (#698)

Xamarin.Forms.Xaml.UnitTests/Issues/Bz40906.xaml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="Xamarin.Forms.Xaml.UnitTests.Bz40906">
+	<Label x:Name="label0">
+		<![CDATA[Foo]]>
+	</Label>
+	<Label x:Name="label1">
+		<![CDATA[Foo]]>Bar<![CDATA[>><<]]>
+	</Label>
+</ContentPage>

Xamarin.Forms.Xaml.UnitTests/Issues/Bz40906.xaml.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using NUnit.Framework;
+using Xamarin.Forms;
+using Xamarin.Forms.Core.UnitTests;
+
+namespace Xamarin.Forms.Xaml.UnitTests
+{
+	public partial class Bz40906 : ContentPage
+	{
+		public Bz40906()
+		{
+			InitializeComponent();
+		}
+
+		public Bz40906(bool useCompiledXaml)
+		{
+			//this stub will be replaced at compile time
+		}
+
+		[TestFixture]
+		class Tests
+		{
+			[SetUp]
+			public void Setup()
+			{
+				Device.PlatformServices = new MockPlatformServices();
+			}
+
+			[TearDown]
+			public void TearDown()
+			{
+				Device.PlatformServices = null;
+			}
+
+			[TestCase(true)]
+			[TestCase(false)]
+			public void ParsingCDATA(bool useCompiledXaml)
+			{
+				var page = new Bz40906(useCompiledXaml);
+				Assert.AreEqual("Foo", page.label0.Text);
+				Assert.AreEqual("FooBar>><<", page.label1.Text);
+}
+		}
+	}
+}

Xamarin.Forms.Xaml.UnitTests/Xamarin.Forms.Xaml.UnitTests.csproj

@@ -406,6 +406,9 @@
     <Compile Include="Issues\Unreported008.xaml.cs">
       <DependentUpon>Unreported008.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Issues\Bz40906.xaml.cs">
+      <DependentUpon>Bz40906.xaml</DependentUpon>
+    </Compile>
     <Compile Include="Issues\Bz45179.xaml.cs">
       <DependentUpon>Bz45179.xaml</DependentUpon>
     </Compile>
@@ -742,6 +745,9 @@
     <EmbeddedResource Include="Issues\Unreported008.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Include="Issues\Bz40906.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
     <EmbeddedResource Include="Issues\Bz45179.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>

Xamarin.Forms.Xaml/XamlParser.cs

@@ -104,7 +104,11 @@ namespace Xamarin.Forms.Xaml
 					case XmlNodeType.Whitespace:
 						break;
 					case XmlNodeType.Text:
-						node.CollectionItems.Add(new ValueNode(reader.Value.Trim(), (IXmlNamespaceResolver)reader));
+					case XmlNodeType.CDATA:
+						if (node.CollectionItems.Count == 1 && node.CollectionItems[0] is ValueNode)
+							((ValueNode)node.CollectionItems[0]).Value += reader.Value.Trim();
+						else
+							node.CollectionItems.Add(new ValueNode(reader.Value.Trim(), (IXmlNamespaceResolver)reader));
 						break;
 					default:
 						Debug.WriteLine("Unhandled node {0} {1} {2}", reader.NodeType, reader.Name, reader.Value);