1 files changed, 96 insertions, 0 deletions
diff --git a/Xamarin.Forms.Build.Tasks/XamlTask.cs b/Xamarin.Forms.Build.Tasks/XamlTask.cs
new file mode 100644
index 00000000..d4864ac3
--- /dev/null
+++ b/Xamarin.Forms.Build.Tasks/XamlTask.cs
@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Xml;
+
+using Microsoft.Build.Framework;
+using Microsoft.Build.Utilities;
+
+using Mono.Cecil;
+
+using Xamarin.Forms.Xaml;
+
+namespace Xamarin.Forms.Build.Tasks
+{
+	public abstract class XamlTask : AppDomainIsolatedTask
+	{
+		[Required]
+		public string Assembly { get; set; }
+		public string DependencyPaths { get; set; }
+		public string ReferencePath { get; set; }
+		public int Verbosity { get; set; }
+		public bool DebugSymbols { get; set; }
+
+		internal XamlTask()
+		{
+		}
+
+		protected Logger Logger { get; set; }
+
+		public override bool Execute()
+		{
+			Logger = new Logger(Log, Verbosity);
+			return Execute(null);
+		}
+
+		public abstract bool Execute(IList<Exception> thrownExceptions);
+
+		protected static MethodDefinition DuplicateMethodDef(TypeDefinition typeDef, MethodDefinition methodDef, string newName)
+		{
+			var dup = new MethodDefinition(newName, methodDef.Attributes, methodDef.ReturnType);
+			dup.Body = methodDef.Body;
+			typeDef.Methods.Add(dup);
+			return dup;
+		}
+
+		internal static ILRootNode ParseXaml(Stream stream, TypeReference typeReference)
+		{
+			ILRootNode rootnode = null;
+			using (var reader = XmlReader.Create(stream)) {
+				while (reader.Read()) {
+					//Skip until element
+					if (reader.NodeType == XmlNodeType.Whitespace)
+						continue;
+					if (reader.NodeType != XmlNodeType.Element) {
+						Debug.WriteLine("Unhandled node {0} {1} {2}", reader.NodeType, reader.Name, reader.Value);
+						continue;
+					}
+
+					XamlParser.ParseXaml(
+						rootnode = new ILRootNode(new XmlType(reader.NamespaceURI, reader.Name, null), typeReference, reader as IXmlNamespaceResolver), reader);
+					break;
+				}
+			}
+			return rootnode;
+		}
+	}
+
+	static class CecilExtensions
+	{
+		public static bool IsXaml(this EmbeddedResource resource, out string classname)
+		{
+			classname = null;
+			if (!resource.Name.EndsWith(".xaml", StringComparison.InvariantCulture))
+				return false;
+
+			using (var resourceStream = resource.GetResourceStream()) {
+				var xmlDoc = new XmlDocument();
+				xmlDoc.Load(resourceStream);
+
+				var nsmgr = new XmlNamespaceManager(xmlDoc.NameTable);
+
+				var root = xmlDoc.SelectSingleNode("/*", nsmgr);
+				if (root == null)
+					return false;
+
+				var rootClass = root.Attributes ["Class", "http://schemas.microsoft.com/winfx/2006/xaml"] ??
+								root.Attributes ["Class", "http://schemas.microsoft.com/winfx/2009/xaml"];
+				if (rootClass == null)
+					return false;
+				classname = rootClass.Value;
+				return true;
+			}
+		}
+	}
+}
+\ No newline at end of file