Fix #450: FormatItem completion and partial completion

Author: dgrunwald

src/AddIns/BackendBindings/CSharpBinding/Project/CSharpBinding.csproj

@@ -79,17 +79,19 @@
     <Compile Include="Src\Completion\CSharpInsightItem.cs" />
     <Compile Include="Src\Completion\CSharpMethodInsight.cs" />
     <Compile Include="Src\Completion\EventCreationCompletionData.cs" />
+    <Compile Include="Src\Completion\FormatItemCompletionData.cs" />
     <Compile Include="Src\Completion\ImportCompletionData.cs" />
     <Compile Include="Src\Completion\OverrideCompletionData.cs" />
     <Compile Include="Src\Completion\OverrideEqualsGetHashCodeCompletionData.cs" />
     <Compile Include="Src\Completion\OverrideToStringCompletionData.cs" />
+    <Compile Include="Src\Completion\PartialCompletionData.cs" />
     <Compile Include="Src\Completion\SegmentTrackingOutputFormatter.cs" />
     <Compile Include="Src\Completion\TypeCompletionData.cs" />
     <Compile Include="Src\Completion\XmlDocCompletionData.cs" />
     <Compile Include="Src\CSharpSemanticHighlighterVisitor.cs">
       <DependentUpon>CSharpSemanticHighlighter.cs</DependentUpon>
     </Compile>
-	<Compile Include="Src\FormattingStrategy\CSharpFormattingOptionsContainer.cs" />
+    <Compile Include="Src\FormattingStrategy\CSharpFormattingOptionsContainer.cs" />
     <Compile Include="Src\FormattingStrategy\CSharpFormatter.cs" />
     <Compile Include="Src\FormattingStrategy\CSharpFormattingOptionsPersistence.cs" />
     <Compile Include="Src\FormattingStrategy\FormattingOptionBinding.cs" />

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Completion/CSharpCompletionDataFactory.cs

@@ -136,7 +136,7 @@ ICompletionData ICompletionDataFactory.CreateNewOverrideCompletionData(int decla
 
 		ICompletionData ICompletionDataFactory.CreateNewPartialCompletionData(int declarationBegin, IUnresolvedTypeDefinition type, IUnresolvedMember m)
 		{
-			return new CompletionData("TODO: partial completion");
+			return new PartialCompletionData(declarationBegin, m.Resolve(contextAtCaret.CurrentTypeResolveContext), contextAtCaret);
 		}
 
 		IEnumerable<ICompletionData> ICompletionDataFactory.CreateCodeTemplateCompletionData()
@@ -162,7 +162,7 @@ ICompletionData ICompletionDataFactory.CreateImportCompletionData(IType type, bo
 
 		ICompletionData ICompletionDataFactory.CreateFormatItemCompletionData(string format, string description, object example)
 		{
-			return new CompletionData("TODO: format item completion");
+			return new FormatItemCompletionData(format, description, example);
 		}
 
 		ICompletionData ICompletionDataFactory.CreateXmlDocCompletionData(string tag, string description, string tagInsertionText)

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Completion/CompletionData.cs

@@ -87,8 +87,20 @@ public virtual void Complete(CompletionContext context)
 			context.EndOffset = context.StartOffset + this.CompletionText.Length;
 		}
 
+		object fancyContent;
+		
 		object IFancyCompletionItem.Content {
-			get { return this.DisplayText; }
+			get { 
+				if (fancyContent == null) {
+					fancyContent = CreateFancyContent();
+				}
+				return fancyContent;
+			}
+		}
+		
+		protected virtual object CreateFancyContent()
+		{
+			return DisplayText;
 		}
 
 		object fancyDescription;

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Completion/FormatItemCompletionData.cs

@@ -0,0 +1,53 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// 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 System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using ICSharpCode.SharpDevelop.Editor.CodeCompletion;
+
+namespace CSharpBinding.Completion
+{
+	class FormatItemCompletionData : CompletionData
+	{
+		readonly string description;
+		readonly string format;
+
+		public FormatItemCompletionData(string format, string description, object example)
+			: base(format)
+		{
+			this.description = description;
+			this.format = format;
+			this.DisplayText = format + " - " + description;
+			try {
+				this.Description = string.Format("{0:" + format + "}", example);
+			} catch (FormatException) {
+			}
+		}
+		
+		protected override object CreateFancyContent()
+		{
+			TextBlock textBlock = new TextBlock();
+			textBlock.Inlines.Add(new Run(format));
+			textBlock.Inlines.Add(new Run(" - " + description) { Foreground = SystemColors.GrayTextBrush });
+			return textBlock;
+		}
+	}
+}

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Completion/PartialCompletionData.cs

@@ -0,0 +1,93 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// 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 System.IO;
+using System.Linq;
+using ICSharpCode.NRefactory.CSharp;
+using ICSharpCode.NRefactory.CSharp.Refactoring;
+using ICSharpCode.NRefactory.CSharp.Resolver;
+using ICSharpCode.NRefactory.TypeSystem;
+using ICSharpCode.SharpDevelop;
+using ICSharpCode.SharpDevelop.Editor.CodeCompletion;
+using CSharpBinding.FormattingStrategy;
+
+namespace CSharpBinding.Completion
+{
+	/// <summary>
+	/// Item for 'partial' completion.
+	/// </summary>
+	class PartialCompletionData : EntityCompletionData
+	{
+		protected readonly int declarationBegin;
+		protected readonly CSharpResolver contextAtCaret;
+		
+		public PartialCompletionData(int declarationBegin, IMember m, CSharpResolver contextAtCaret)
+			: base(m)
+		{
+			this.declarationBegin = declarationBegin;
+			this.contextAtCaret = contextAtCaret;
+			var ambience = new CSharpAmbience();
+			ambience.ConversionFlags = ConversionFlags.ShowTypeParameterList | ConversionFlags.ShowParameterList | ConversionFlags.ShowParameterNames;
+			this.CompletionText = ambience.ConvertSymbol(m);
+		}
+		
+		public override void Complete(CompletionContext context)
+		{
+			if (declarationBegin > context.StartOffset) {
+				base.Complete(context);
+				return;
+			}
+			
+			TypeSystemAstBuilder b = new TypeSystemAstBuilder(contextAtCaret);
+			b.GenerateBody = true;
+			
+			var entityDeclaration = b.ConvertEntity(this.Entity);
+			entityDeclaration.Modifiers &= ~Modifiers.VisibilityMask; // remove visiblity
+			entityDeclaration.Modifiers |= Modifiers.Partial;
+			
+			var document = context.Editor.Document;
+			StringWriter w = new StringWriter();
+			var formattingOptions = CSharpFormattingOptionsPersistence.GetProjectOptions(contextAtCaret.Compilation.GetProject());
+			var segmentDict = SegmentTrackingOutputFormatter.WriteNode(
+				w, entityDeclaration, formattingOptions.OptionsContainer.GetEffectiveOptions(), context.Editor.Options);
+			
+			using (document.OpenUndoGroup()) {
+				string newText = w.ToString().TrimEnd();
+				document.Replace(declarationBegin, context.EndOffset - declarationBegin, newText);
+				var throwStatement = entityDeclaration.Descendants.FirstOrDefault(n => n is ThrowStatement);
+				if (throwStatement != null) {
+					var segment = segmentDict[throwStatement];
+					context.Editor.Select(declarationBegin + segment.Offset, segment.Length);
+				}
+				CSharpFormatterHelper.Format(context.Editor, declarationBegin, newText.Length, formattingOptions.OptionsContainer);
+			}
+		}
+		
+		IEnumerable<Expression> ParametersToExpressions(IEntity entity)
+		{
+			foreach (var p in ((IParameterizedMember)entity).Parameters) {
+				if (p.IsRef || p.IsOut)
+					yield return new DirectionExpression(p.IsOut ? FieldDirection.Out : FieldDirection.Ref, new IdentifierExpression(p.Name));
+				else
+					yield return new IdentifierExpression(p.Name);
+			}
+		}
+	}
+}