[Editing] Use CancellationTokens for TypeReferenceFinder-timeouts.

Author: Alexander Bothe

DParser2/Completion/CodeCompletion.cs

@@ -144,6 +144,21 @@ public static ISyntaxRegion FindCurrentCaretContext(IEditorData editor,
 			return currentScope;
 		}
 
+		public static void DoTimeoutableCompletionTask(ICompletionDataGenerator cdgen, ResolutionContext ctxt, Action ac, CancellationToken token)
+		{
+			if (token.IsCancellationRequested)
+				return;
+
+			ctxt.CancelOperation = false;
+			token.Register(() => { 
+				ctxt.CancelOperation = true; 
+				if (cdgen != null)
+					cdgen.NotifyTimeout(); 
+			});
+
+			ac();
+		}
+
 		/// <param name="cdgen">Can be null.</param>
 		/// <param name="ctxt"></param>
 		/// <param name="ac"></param>

DParser2/Refactoring/TypeReferenceFinder.cs

@@ -32,6 +32,7 @@
 using D_Parser.Dom.Statements;
 using System;
 using D_Parser.Completion;
+using System.Threading;
 
 namespace D_Parser.Refactoring
 {
@@ -64,7 +65,7 @@ protected TypeReferenceFinder (ResolutionContext ctxt, List<ISyntaxRegion> i) :
 			this.invalidConditionalCodeRegions = i;
 		}
 
-		public static Dictionary<int, Dictionary<ISyntaxRegion, byte>> Scan(IEditorData ed, List<ISyntaxRegion> invalidConditionalCodeRegions = null, int timeout = int.MinValue)
+		public static Dictionary<int, Dictionary<ISyntaxRegion, byte>> Scan(IEditorData ed, CancellationToken cancelToken, List<ISyntaxRegion> invalidConditionalCodeRegions = null)
 		{
 			if (ed == null || ed.SyntaxTree == null)
 				return new Dictionary<int, Dictionary<ISyntaxRegion,byte>>();
@@ -76,7 +77,7 @@ public static Dictionary<int, Dictionary<ISyntaxRegion, byte>> Scan(IEditorData
 
 			var typeRefFinder = new TypeReferenceFinder(ctxt, invalidConditionalCodeRegions);
 
-			CodeCompletion.DoTimeoutableCompletionTask(null, ctxt, () => ed.SyntaxTree.Accept(typeRefFinder), timeout);
+			CodeCompletion.DoTimeoutableCompletionTask(null, ctxt, () => ed.SyntaxTree.Accept(typeRefFinder), cancelToken);
 
 			return typeRefFinder.Matches;
 		}