[Ide] Introduced a way to handle competing completion extensions in

projections.
The projected filter completion should filter completion relevant
events for the original completion extension if a projected completion
extension should handle them.

4 files changed, 197 insertions, 2 deletions

diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor.Extension/CompletionTextEditorExtension.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor.Extension/CompletionTextEditorExtension.cs
index a6995cf88f..2425d511de 100644
--- a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor.Extension/CompletionTextEditorExtension.cs
+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor.Extension/CompletionTextEditorExtension.cs
@@ -519,6 +519,11 @@ namespace MonoDevelop.Ide.Editor.Extension
 //				document.Editor.Parent.TextArea.FocusOutEvent += HandleFocusOutEvent;
 		}
 
+		internal void InternalInitialize ()
+		{
+			Initialize ();
+		}
+
 		void HandlePositionChanged (object sender, EventArgs e)
 		{
 			CompletionWindowManager.UpdateCursorPosition ();
diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/Projection/ProjectedFilterCompletionTextEditorExtension.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/Projection/ProjectedFilterCompletionTextEditorExtension.cs
new file mode 100644
index 0000000000..15b3ecfc61
--- /dev/null
+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/Projection/ProjectedFilterCompletionTextEditorExtension.cs
@@ -0,0 +1,186 @@
+//
+// ProjectedFilterCompletionTextEditorExtension.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.Collections.Generic;
+using MonoDevelop.Ide.Editor.Extension;
+
+namespace MonoDevelop.Ide.Editor.Projection
+{
+	sealed class ProjectedFilterCompletionTextEditorExtension : CompletionTextEditorExtension, IProjectionExtension
+	{
+		CompletionTextEditorExtension completionTextEditorExtension;
+		IReadOnlyList<Projection> projections;
+
+		IReadOnlyList<Projection> IProjectionExtension.Projections {
+			get {
+				return projections;
+			}
+			set {
+				projections = value;
+			}
+		}
+
+		public ProjectedFilterCompletionTextEditorExtension (CompletionTextEditorExtension completionTextEditorExtension, IReadOnlyList<Projection> projections)
+		{
+			this.completionTextEditorExtension = completionTextEditorExtension;
+			this.projections = projections;
+		}
+
+		bool IsInProjection ()
+		{
+			int offset = Editor.CaretOffset;
+			foreach (var p in projections) {
+				foreach (var seg in p.ProjectedSegments) {
+					if (seg.ContainsOriginal (offset))
+						return true;
+				}
+			}
+			return false;
+		}
+
+		public override bool KeyPress (KeyDescriptor descriptor)
+		{
+			if (IsInProjection())
+				return Next == null || Next.KeyPress (descriptor);
+			return completionTextEditorExtension.KeyPress (descriptor);
+		}
+
+		public override bool IsValidInContext (DocumentContext context)
+		{
+			if (IsInProjection())
+				return false;
+			return completionTextEditorExtension.IsValidInContext (context);
+		}
+
+		public override int GetCurrentParameterIndex (int startOffset)
+		{
+			if (IsInProjection())
+				return -1;
+			return completionTextEditorExtension.GetCurrentParameterIndex (startOffset);
+		}
+
+		public override string CompletionLanguage {
+			get {
+				return completionTextEditorExtension.CompletionLanguage;
+			}
+		}
+
+		public override void RunCompletionCommand ()
+		{
+			if (IsInProjection ())
+				return;
+			completionTextEditorExtension.RunCompletionCommand ();
+		}
+
+		public override void RunShowCodeTemplatesWindow ()
+		{
+			if (IsInProjection ())
+				return;
+			completionTextEditorExtension.RunShowCodeTemplatesWindow ();
+		}
+
+		public override void RunParameterCompletionCommand ()
+		{
+			if (IsInProjection ())
+				return;
+			completionTextEditorExtension.RunParameterCompletionCommand ();
+		}
+
+		public override bool CanRunCompletionCommand ()
+		{
+			if (IsInProjection ())
+				return false;
+			return completionTextEditorExtension.CanRunCompletionCommand ();
+		}
+
+		public override bool CanRunParameterCompletionCommand ()
+		{
+			if (IsInProjection ())
+				return false;
+			return completionTextEditorExtension.CanRunParameterCompletionCommand ();
+		}
+
+		public override System.Threading.Tasks.Task<CodeCompletion.ICompletionDataList> HandleCodeCompletionAsync (CodeCompletion.CodeCompletionContext completionContext, char completionChar, System.Threading.CancellationToken token)
+		{
+			return completionTextEditorExtension.HandleCodeCompletionAsync (completionContext, completionChar, token);
+		}
+
+		public override System.Threading.Tasks.Task<CodeCompletion.ParameterHintingResult> HandleParameterCompletionAsync (CodeCompletion.CodeCompletionContext completionContext, char completionChar, System.Threading.CancellationToken token)
+		{
+			return completionTextEditorExtension.HandleParameterCompletionAsync (completionContext, completionChar, token);
+		}
+
+		public override bool GetCompletionCommandOffset (out int cpos, out int wlen)
+		{
+			if (IsInProjection ()) {
+				cpos = 0; wlen = 0;
+				return false;
+			}
+			return completionTextEditorExtension.GetCompletionCommandOffset (out cpos, out wlen);
+		}
+
+		public override CodeCompletion.ICompletionDataList ShowCodeSurroundingsCommand (CodeCompletion.CodeCompletionContext completionContext)
+		{
+			if (IsInProjection ()) return null;
+			return completionTextEditorExtension.ShowCodeSurroundingsCommand (completionContext);
+		}
+
+		public override CodeCompletion.ICompletionDataList ShowCodeTemplatesCommand (CodeCompletion.CodeCompletionContext completionContext)
+		{
+			if (IsInProjection ()) return null;
+			return completionTextEditorExtension.ShowCodeTemplatesCommand (completionContext);
+		}
+
+		public override CodeCompletion.ICompletionDataList CodeCompletionCommand (CodeCompletion.CodeCompletionContext completionContext)
+		{
+			if (IsInProjection ()) return null;
+			return completionTextEditorExtension.CodeCompletionCommand (completionContext);
+		}
+
+		public override CodeCompletion.ParameterHintingResult ParameterCompletionCommand (CodeCompletion.CodeCompletionContext completionContext)
+		{
+			if (IsInProjection ()) return null;
+			return completionTextEditorExtension.ParameterCompletionCommand (completionContext);
+		}
+
+		public override int GuessBestMethodOverload (CodeCompletion.ParameterHintingResult provider, int currentOverload)
+		{
+			if (IsInProjection ()) return -1;
+			return completionTextEditorExtension.GuessBestMethodOverload (provider, currentOverload);
+		}
+
+		protected override void Initialize ()
+		{
+			completionTextEditorExtension.InternalInitialize ();
+		}
+
+		public override void Dispose ()
+		{
+			completionTextEditorExtension.Dispose ();
+		}
+	}
+}
+
diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/TextEditor.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/TextEditor.cs
index f143276e14..705b6e58e5 100644
--- a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/TextEditor.cs
+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/TextEditor.cs
@@ -1223,15 +1223,18 @@ namespace MonoDevelop.Ide.Editor
 				return;
 
 			TextEditorExtension lastExtension = textEditorImpl.EditorExtension;
-			while (lastExtension != null && lastExtension.Next != null)
+			while (lastExtension != null && lastExtension.Next != null) {
+				var completionTextEditorExtension = lastExtension.Next as CompletionTextEditorExtension;
+				if (completionTextEditorExtension != null) 
+					lastExtension.Next = new ProjectedFilterCompletionTextEditorExtension (completionTextEditorExtension, projections) { Next = completionTextEditorExtension.Next };
 				lastExtension = lastExtension.Next;
+			}
 
 			// no extensions -> no projections needed
 			if (textEditorImpl.EditorExtension == null)
 				return;
 
 			if ((disabledFeatures & DisabledProjectionFeatures.Completion) != DisabledProjectionFeatures.Completion) {
-				
 				var projectedCompletionExtension = new ProjectedCompletionExtension (ctx, projections);
 				projectedCompletionExtension.Next = textEditorImpl.EditorExtension;
 
diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.csproj b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.csproj
index f96760a646..0d5e43f1c5 100644
--- a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.csproj
+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.csproj
@@ -3473,6 +3473,7 @@
     <Compile Include="MonoDevelop.Ide.CodeCompletion\MruCache.cs" />
     <Compile Include="MonoDevelop.Ide.Editor\TooltipExtensionNode.cs" />
     <Compile Include="MonoDevelop.Ide.Editor\Projection\IProjectionExtension.cs" />
+    <Compile Include="MonoDevelop.Ide.Editor\Projection\ProjectedFilterCompletionTextEditorExtension.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Makefile.am" />