1 files changed, 177 insertions, 0 deletions
diff --git a/main/src/core/MonoDevelop.Core/MonoDevelop.Projects.Formats.MSBuild/MSBuildEvaluationContext.cs b/main/src/core/MonoDevelop.Core/MonoDevelop.Projects.Formats.MSBuild/MSBuildEvaluationContext.cs
new file mode 100644
index 0000000000..c681f46c94
--- /dev/null
+++ b/main/src/core/MonoDevelop.Core/MonoDevelop.Projects.Formats.MSBuild/MSBuildEvaluationContext.cs
@@ -0,0 +1,177 @@
+//
+// MSBuildEvaluationContext.cs
+//
+// Author:
+//       Lluis Sanchez Gual <lluis@xamarin.com>
+//
+// Copyright (c) 2014 Xamarin, Inc (http://www.xamarin.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;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using System.Xml;
+using System.Text;
+
+using Microsoft.Build.BuildEngine;
+
+namespace MonoDevelop.Projects.Formats.MSBuild
+{
+
+	public class MSBuildEvaluationContext: IExpressionContext
+	{
+		Dictionary<string,string> properties = new Dictionary<string, string> ();
+		bool allResolved;
+		MSBuildProject project;
+
+		public MSBuildEvaluationContext ()
+		{
+		}
+
+		internal void InitEvaluation (MSBuildProject project)
+		{
+			this.project = project;
+			SetPropertyValue ("MSBuildThisFile", Path.GetFileName (project.FileName));
+			SetPropertyValue ("MSBuildThisFileName", Path.GetFileNameWithoutExtension (project.FileName));
+			SetPropertyValue ("MSBuildThisFileDirectory", Path.GetDirectoryName (project.FileName) + Path.DirectorySeparatorChar);
+			SetPropertyValue ("MSBuildThisFileExtension", Path.GetExtension (project.FileName));
+			SetPropertyValue ("MSBuildThisFileFullPath", Path.GetFullPath (project.FileName));
+			SetPropertyValue ("VisualStudioReferenceAssemblyVersion", project.ToolsVersion + ".0.0");
+		}
+
+		public string GetPropertyValue (string name)
+		{
+			string val;
+			if (properties.TryGetValue (name, out val))
+				return val;
+			else
+				return Environment.GetEnvironmentVariable (name);
+		}
+
+		public void SetPropertyValue (string name, string value)
+		{
+			properties [name] = value;
+		}
+
+		public void ClearPropertyValue (string name)
+		{
+			properties.Remove (name);
+		}
+
+		public bool Evaluate (XmlElement source, out XmlElement result)
+		{
+			allResolved = true;
+			result = (XmlElement) EvaluateNode (source);
+			return allResolved;
+		}
+
+		XmlNode EvaluateNode (XmlNode source)
+		{
+			var elemSource = source as XmlElement;
+			if (elemSource != null) {
+				var elem = source.OwnerDocument.CreateElement (elemSource.Prefix, elemSource.LocalName, elemSource.NamespaceURI);
+				foreach (XmlAttribute attr in elemSource.Attributes)
+					elem.Attributes.Append ((XmlAttribute)EvaluateNode (attr));
+				foreach (XmlNode child in elemSource.ChildNodes)
+					elem.AppendChild (EvaluateNode (child));
+				return elem;
+			}
+
+			var attSource = source as XmlAttribute;
+			if (attSource != null) {
+				bool oldResolved = allResolved;
+				var att = source.OwnerDocument.CreateAttribute (attSource.Prefix, attSource.LocalName, attSource.NamespaceURI);
+				att.Value = Evaluate (attSource.Value);
+
+				// Condition attributes don't change the resolution status. Conditions are handled in the property and item objects
+				if (attSource.Name == "Condition")
+					allResolved = oldResolved;
+
+				return att;
+			}
+			var textSource = source as XmlText;
+			if (textSource != null) {
+				return source.OwnerDocument.CreateTextNode (Evaluate (textSource.InnerText));
+			}
+			return source.Clone ();
+		}
+
+		public bool Evaluate (string str, out string result)
+		{
+			allResolved = true;
+			result = Evaluate (str);
+			return allResolved;
+		}
+
+		string Evaluate (string str)
+		{
+			int i = str.IndexOf ("$(");
+			if (i == -1)
+				return str;
+
+			int last = 0;
+
+			StringBuilder sb = new StringBuilder ();
+			do {
+				sb.Append (str, last, i - last);
+				i += 2;
+				int j = str.IndexOf (")", i);
+				if (j == -1) {
+					allResolved = false;
+					return "";
+				}
+
+				string prop = str.Substring (i, j - i);
+				string val = GetPropertyValue (prop);
+				if (val == null) {
+					allResolved = false;
+					return "";
+				}
+
+				sb.Append (val);
+				last = j + 1;
+				i = str.IndexOf ("$(", last);
+			}
+			while (i != -1);
+
+			sb.Append (str, last, str.Length - last);
+			return sb.ToString ();
+		}
+
+		#region IExpressionContext implementation
+
+		public string EvaluateString (string value)
+		{
+			if (value.StartsWith ("$(") && value.EndsWith (")"))
+				return GetPropertyValue (value.Substring (2, value.Length - 3)) ?? value;
+			else
+				return value;
+		}
+
+		public string FullFileName {
+			get {
+				return project.FileName;
+			}
+		}
+
+		#endregion
+	}
+}