1 files changed, 369 insertions, 0 deletions
diff --git a/ICSharpCode.Decompiler/Ast/TextTokenWriter.cs b/ICSharpCode.Decompiler/Ast/TextTokenWriter.cs
new file mode 100644
index 00000000..fed08aaa
--- /dev/null
+++ b/ICSharpCode.Decompiler/Ast/TextTokenWriter.cs
@@ -0,0 +1,369 @@
+// Copyright (c) 2011 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.Linq;
+using ICSharpCode.Decompiler;
+using ICSharpCode.Decompiler.ILAst;
+using ICSharpCode.NRefactory;
+using ICSharpCode.NRefactory.CSharp;
+using Mono.Cecil;
+
+namespace ICSharpCode.Decompiler.Ast
+{
+	public class TextTokenWriter : TokenWriter
+	{
+		readonly ITextOutput output;
+		readonly DecompilerContext context;
+		readonly Stack<AstNode> nodeStack = new Stack<AstNode>();
+		int braceLevelWithinType = -1;
+		bool inDocumentationComment = false;
+		bool firstUsingDeclaration;
+		bool lastUsingDeclaration;
+		
+		TextLocation? lastEndOfLine;
+		
+		public bool FoldBraces = false;
+		
+		public TextTokenWriter(ITextOutput output, DecompilerContext context)
+		{
+			if (output == null)
+				throw new ArgumentNullException("output");
+			if (context == null)
+				throw new ArgumentNullException("context");
+			this.output = output;
+			this.context = context;
+		}
+		
+		public override void WriteIdentifier(Identifier identifier)
+		{
+			var definition = GetCurrentDefinition();
+			if (definition != null) {
+				output.WriteDefinition(identifier.Name, definition, false);
+				return;
+			}
+			
+			object memberRef = GetCurrentMemberReference();
+
+			if (memberRef != null) {
+				output.WriteReference(identifier.Name, memberRef);
+				return;
+			}
+
+			definition = GetCurrentLocalDefinition();
+			if (definition != null) {
+				output.WriteDefinition(identifier.Name, definition);
+				return;
+			}
+
+			memberRef = GetCurrentLocalReference();
+			if (memberRef != null) {
+				output.WriteReference(identifier.Name, memberRef, true);
+				return;
+			}
+
+			if (firstUsingDeclaration) {
+				output.MarkFoldStart(defaultCollapsed: true);
+				firstUsingDeclaration = false;
+			}
+
+			output.Write(identifier.Name);
+		}
+
+		MemberReference GetCurrentMemberReference()
+		{
+			AstNode node = nodeStack.Peek();
+			MemberReference memberRef = node.Annotation<MemberReference>();
+			if (memberRef == null && node.Role == Roles.TargetExpression && (node.Parent is InvocationExpression || node.Parent is ObjectCreateExpression)) {
+				memberRef = node.Parent.Annotation<MemberReference>();
+			}
+			if (node is IdentifierExpression && node.Role == Roles.TargetExpression && node.Parent is InvocationExpression && memberRef != null) {
+				var declaringType = memberRef.DeclaringType.Resolve();
+				if (declaringType != null && declaringType.IsDelegate())
+					return null;
+			}
+			return FilterMemberReference(memberRef);
+		}
+
+		MemberReference FilterMemberReference(MemberReference memberRef)
+		{
+			if (memberRef == null)
+				return null;
+
+			if (context.Settings.AutomaticEvents && memberRef is FieldDefinition) {
+				var field = (FieldDefinition)memberRef;
+				return field.DeclaringType.Events.FirstOrDefault(ev => ev.Name == field.Name) ?? memberRef;
+			}
+
+			return memberRef;
+		}
+
+		object GetCurrentLocalReference()
+		{
+			AstNode node = nodeStack.Peek();
+			ILVariable variable = node.Annotation<ILVariable>();
+			if (variable != null) {
+				if (variable.OriginalParameter != null)
+					return variable.OriginalParameter;
+				//if (variable.OriginalVariable != null)
+				//    return variable.OriginalVariable;
+				return variable;
+			}
+
+			var gotoStatement = node as GotoStatement;
+			if (gotoStatement != null)
+			{
+				var method = nodeStack.Select(nd => nd.Annotation<MethodReference>()).FirstOrDefault(mr => mr != null);
+				if (method != null)
+					return method.ToString() + gotoStatement.Label;
+			}
+
+			return null;
+		}
+
+		object GetCurrentLocalDefinition()
+		{
+			AstNode node = nodeStack.Peek();
+			if (node is Identifier && node.Parent != null)
+				node = node.Parent;
+			
+			var parameterDef = node.Annotation<ParameterDefinition>();
+			if (parameterDef != null)
+				return parameterDef;
+
+			if (node is VariableInitializer || node is CatchClause || node is ForeachStatement) {
+				var variable = node.Annotation<ILVariable>();
+				if (variable != null) {
+					if (variable.OriginalParameter != null)
+						return variable.OriginalParameter;
+					//if (variable.OriginalVariable != null)
+					//    return variable.OriginalVariable;
+					return variable;
+				}
+			}
+
+			var label = node as LabelStatement;
+			if (label != null) {
+				var method = nodeStack.Select(nd => nd.Annotation<MethodReference>()).FirstOrDefault(mr => mr != null);
+				if (method != null)
+					return method.ToString() + label.Label;
+			}
+
+			return null;
+		}
+		
+		object GetCurrentDefinition()
+		{
+			if (nodeStack == null || nodeStack.Count == 0)
+				return null;
+			
+			var node = nodeStack.Peek();
+			if (node is Identifier)
+				node = node.Parent;
+			if (IsDefinition(node))
+				return node.Annotation<MemberReference>();
+			
+			return null;
+		}
+		
+		public override void WriteKeyword(Role role, string keyword)
+		{
+			output.Write(keyword);
+		}
+		
+		public override void WriteToken(Role role, string token)
+		{
+			// Attach member reference to token only if there's no identifier in the current node.
+			MemberReference memberRef = GetCurrentMemberReference();
+			var node = nodeStack.Peek();
+			if (memberRef != null && node.GetChildByRole(Roles.Identifier).IsNull)
+				output.WriteReference(token, memberRef);
+			else
+				output.Write(token);
+		}
+		
+		public override void Space()
+		{
+			output.Write(' ');
+		}
+		
+		public void OpenBrace(BraceStyle style)
+		{
+			if (braceLevelWithinType >= 0 || nodeStack.Peek() is TypeDeclaration)
+				braceLevelWithinType++;
+			if (nodeStack.OfType<BlockStatement>().Count() <= 1 || FoldBraces) {
+				output.MarkFoldStart(defaultCollapsed: braceLevelWithinType == 1);
+			}
+			output.WriteLine();
+			output.WriteLine("{");
+			output.Indent();
+		}
+		
+		public void CloseBrace(BraceStyle style)
+		{
+			output.Unindent();
+			output.Write('}');
+			if (nodeStack.OfType<BlockStatement>().Count() <= 1 || FoldBraces)
+				output.MarkFoldEnd();
+			if (braceLevelWithinType >= 0)
+				braceLevelWithinType--;
+		}
+		
+		public override void Indent()
+		{
+			output.Indent();
+		}
+		
+		public override void Unindent()
+		{
+			output.Unindent();
+		}
+		
+		public override void NewLine()
+		{
+			if (lastUsingDeclaration) {
+				output.MarkFoldEnd();
+				lastUsingDeclaration = false;
+			}
+			lastEndOfLine = output.Location;
+			output.WriteLine();
+		}
+		
+		public override void WriteComment(CommentType commentType, string content)
+		{
+			switch (commentType) {
+				case CommentType.SingleLine:
+					output.Write("//");
+					output.WriteLine(content);
+					break;
+				case CommentType.MultiLine:
+					output.Write("/*");
+					output.Write(content);
+					output.Write("*/");
+					break;
+				case CommentType.Documentation:
+					bool isLastLine = !(nodeStack.Peek().NextSibling is Comment);
+					if (!inDocumentationComment && !isLastLine) {
+						inDocumentationComment = true;
+						output.MarkFoldStart("///" + content, true);
+					}
+					output.Write("///");
+					output.Write(content);
+					if (inDocumentationComment && isLastLine) {
+						inDocumentationComment = false;
+						output.MarkFoldEnd();
+					}
+					output.WriteLine();
+					break;
+				default:
+					output.Write(content);
+					break;
+			}
+		}
+		
+		public override void WritePreProcessorDirective(PreProcessorDirectiveType type, string argument)
+		{
+			// pre-processor directive must start on its own line
+			output.Write('#');
+			output.Write(type.ToString().ToLowerInvariant());
+			if (!string.IsNullOrEmpty(argument)) {
+				output.Write(' ');
+				output.Write(argument);
+			}
+			output.WriteLine();
+		}
+		
+		public override void WritePrimitiveValue(object value, string literalValue = null)
+		{
+			new TextWriterTokenWriter(new TextOutputWriter(output)).WritePrimitiveValue(value, literalValue);
+		}
+		
+		public override void WritePrimitiveType(string type)
+		{
+			output.Write(type);
+			if (type == "new") {
+				output.Write("()");
+			}
+		}
+		
+		Stack<TextLocation> startLocations = new Stack<TextLocation>();
+		Stack<MethodDebugSymbols> symbolsStack = new Stack<MethodDebugSymbols>();
+		
+		public override void StartNode(AstNode node)
+		{
+			if (nodeStack.Count == 0) {
+				if (IsUsingDeclaration(node)) {
+					firstUsingDeclaration = !IsUsingDeclaration(node.PrevSibling);
+					lastUsingDeclaration = !IsUsingDeclaration(node.NextSibling);
+				} else {
+					firstUsingDeclaration = false;
+					lastUsingDeclaration = false;
+				}
+			}
+			nodeStack.Push(node);
+			startLocations.Push(output.Location);
+			
+			if (node is EntityDeclaration && node.Annotation<MemberReference>() != null && node.GetChildByRole(Roles.Identifier).IsNull)
+				output.WriteDefinition("", node.Annotation<MemberReference>(), false);
+
+			if (node.Annotation<MethodDebugSymbols>() != null) {
+				symbolsStack.Push(node.Annotation<MethodDebugSymbols>());
+				symbolsStack.Peek().StartLocation = startLocations.Peek();
+			}
+		}
+
+		bool IsUsingDeclaration(AstNode node)
+		{
+			return node is UsingDeclaration || node is UsingAliasDeclaration;
+		}
+
+		public override void EndNode(AstNode node)
+		{
+			if (nodeStack.Pop() != node)
+				throw new InvalidOperationException();
+			
+			var startLocation = startLocations.Pop();
+			
+			// code mappings
+			var ranges = node.Annotation<List<ILRange>>();
+			if (symbolsStack.Count > 0 && ranges != null && ranges.Count > 0) {
+				// Ignore the newline which was printed at the end of the statement
+				TextLocation endLocation = (node is Statement) ? (lastEndOfLine ?? output.Location) : output.Location;
+				symbolsStack.Peek().SequencePoints.Add(
+					new SequencePoint() {
+						ILRanges = ILRange.OrderAndJoin(ranges).ToArray(),
+						StartLocation = startLocation,
+						EndLocation = endLocation
+					});
+			}
+			
+			if (node.Annotation<MethodDebugSymbols>() != null) {
+				symbolsStack.Peek().EndLocation = output.Location;
+				output.AddDebugSymbols(symbolsStack.Pop());
+			}
+		}
+
+		static bool IsDefinition(AstNode node)
+		{
+			return node is EntityDeclaration
+				|| (node is VariableInitializer && node.Parent is FieldDeclaration)
+				|| node is FixedVariableInitializer;
+		}
+	}
+}