1 files changed, 161 insertions, 0 deletions
diff --git a/main/src/addins/CSharpBinding/MonoDevelop.CSharp.Completion/ImportSymbolCompletionData.cs b/main/src/addins/CSharpBinding/MonoDevelop.CSharp.Completion/ImportSymbolCompletionData.cs
new file mode 100644
index 0000000000..83ae1d8660
--- /dev/null
+++ b/main/src/addins/CSharpBinding/MonoDevelop.CSharp.Completion/ImportSymbolCompletionData.cs
@@ -0,0 +1,161 @@
+//
+// ImportSymbolCompletionData.cs
+//
+// Author:
+//       Mike Krüger <mkrueger@xamarin.com>
+//
+// Copyright (c) 2015 Xamarin Inc. (http://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 MonoDevelop.Ide.CodeCompletion;
+using Microsoft.CodeAnalysis;
+using GLib;
+using System.Collections.Generic;
+using MonoDevelop.Core;
+using MonoDevelop.Ide.TypeSystem;
+using MonoDevelop.Components.PropertyGrid.PropertyEditors;
+using MonoDevelop.Ide.Editor;
+using System.Text;
+
+namespace MonoDevelop.CSharp.Completion
+{
+	class ImportSymbolCompletionData : RoslynCompletionData
+	{
+		CSharpCompletionTextEditorExtension ext;
+		INamedTypeSymbol type;
+		bool useFullName;
+
+		public override IconId Icon {
+			get {
+				return type.GetStockIcon ();
+			}
+		}
+
+		public override int PriorityGroup { get { return int.MinValue; } }
+
+		public ImportSymbolCompletionData (CSharpCompletionTextEditorExtension ext, INamedTypeSymbol type, bool useFullName) : base (null, type.Name)
+		{
+			this.ext = ext;
+			this.useFullName = useFullName;
+			this.type = type;
+			this.DisplayFlags |= DisplayFlags.IsImportCompletion;
+		}
+
+		bool initialized = false;
+		bool generateUsing, insertNamespace;
+
+		void Initialize ()
+		{
+			if (initialized)
+				return;
+			initialized = true;
+			if (type.ContainingNamespace == null) 
+				return;
+			generateUsing = !useFullName;
+			insertNamespace = useFullName;
+		}
+
+		static string GetDefaultDisplaySelection (string description, bool isSelected)
+		{
+			if (!isSelected)
+				return "<span foreground=\"darkgray\">" + description + "</span>";
+			return description;
+		}
+
+		string displayDescription = null;
+		public override string GetDisplayDescription (bool isSelected)
+		{
+			if (displayDescription == null) {
+				Initialize ();
+				if (generateUsing || insertNamespace) {
+					displayDescription = string.Format (GettextCatalog.GetString ("(from '{0}')"), type.ContainingNamespace.Name);
+				} else {
+					displayDescription = "";
+				}
+			}
+			return GetDefaultDisplaySelection (displayDescription, isSelected);
+		}
+
+		#region IActionCompletionData implementation
+
+		public override void InsertCompletionText (CompletionListWindow window, ref KeyActions ka, MonoDevelop.Ide.Editor.Extension.KeyDescriptor descriptor)
+		{
+			Initialize ();
+			var doc = ext.DocumentContext;
+			using (var undo = ext.Editor.OpenUndoGroup ()) {
+				string text = insertNamespace ? type.ContainingNamespace.ToDisplayString(SymbolDisplayFormat.CSharpErrorMessageFormat) + "." + type.Name : type.Name;
+				if (text != GetCurrentWord (window)) {
+					if (window.WasShiftPressed && generateUsing) 
+						text = type.ContainingNamespace.ToDisplayString(SymbolDisplayFormat.CSharpErrorMessageFormat) + "." + text;
+					window.CompletionWidget.SetCompletionText (window.CodeCompletionContext, GetCurrentWord (window), text);
+				}
+
+				if (!window.WasShiftPressed && generateUsing) {
+					AddGlobalNamespaceImport (ext.Editor, doc, type.ContainingNamespace.ToDisplayString(SymbolDisplayFormat.CSharpErrorMessageFormat));
+				}
+			}
+			ka |= KeyActions.Ignore;
+		}
+
+		static void AddGlobalNamespaceImport (MonoDevelop.Ide.Editor.TextEditor editor, DocumentContext context, string nsName)
+		{
+			var parsedDocument = context.ParsedDocument;
+			var unit = parsedDocument.GetAst<SemanticModel> ();
+			if (unit == null)
+				return;
+
+			int offset = SearchUsingInsertionPoint (unit.SyntaxTree.GetRoot ());
+
+			var text = new StringBuilder ();
+			text.Append ("using ");
+			text.Append (nsName);
+			text.Append (";");
+			text.Append (editor.EolMarker);
+
+			editor.InsertText (offset, text.ToString ());
+		}
+
+		static int SearchUsingInsertionPoint (SyntaxNode parent)
+		{
+			var result = 0;
+			foreach (SyntaxNode node in parent.ChildNodes ()) {
+				if (node.IsKind (Microsoft.CodeAnalysis.CSharp.SyntaxKind.UsingDirective)) {
+					result = node.FullSpan.End;
+					continue;
+				}
+				SyntaxTrivia last = new SyntaxTrivia ();
+
+				foreach (var trivia in node.GetLeadingTrivia ()) {
+					if (last.IsKind (Microsoft.CodeAnalysis.CSharp.SyntaxKind.SingleLineCommentTrivia)||
+						last.IsKind (Microsoft.CodeAnalysis.CSharp.SyntaxKind.DefineDirectiveTrivia) || 
+						last.IsKind (Microsoft.CodeAnalysis.CSharp.SyntaxKind.MultiLineCommentTrivia) || 
+						last.IsKind (Microsoft.CodeAnalysis.CSharp.SyntaxKind.SingleLineDocumentationCommentTrivia))
+						result = trivia.Span.End;
+					last = trivia;
+				}
+				break;
+			}
+			return result;
+		}
+		#endregion
+	}
+}
+