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//
// NRefactoryExpressionResolverVisitor.cs
//
// Author: Jeffrey Stedfast <jeff@xamarin.com>
//
// Copyright (c) 2013 Xamarin Inc.
//
// 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.Text;
using System.Collections.Generic;
using Microsoft.CodeAnalysis.CSharp;
using Mono.Debugging.Client;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis;
namespace Mono.Debugging.Evaluation
{
// FIXME: if we passed the DebuggerSession and SourceLocation into the NRefactoryExpressionEvaluatorVisitor,
// we wouldn't need to do this resolve step.
public class NRefactoryExpressionResolverVisitor : CSharpSyntaxWalker
{
readonly List<Replacement> replacements = new List<Replacement> ();
readonly SourceLocation location;
readonly DebuggerSession session;
readonly string expression;
string parentType;
class Replacement
{
public string NewText;
public int Offset;
public int Length;
}
public NRefactoryExpressionResolverVisitor (DebuggerSession session, SourceLocation location, string expression)
{
this.expression = expression.Replace ("\n", "").Replace ("\r", "");
this.session = session;
this.location = location;
}
internal string GetResolvedExpression ()
{
if (replacements.Count == 0)
return expression;
replacements.Sort ((r1, r2) => r1.Offset.CompareTo (r2.Offset));
var resolved = new StringBuilder ();
int i = 0;
foreach (var replacement in replacements) {
resolved.Append (expression, i, replacement.Offset - i);
resolved.Append (replacement.NewText);
i = replacement.Offset + replacement.Length;
}
var last = replacements [replacements.Count - 1];
resolved.Append (expression, last.Offset + last.Length, expression.Length - (last.Offset + last.Length));
return resolved.ToString ();
}
string GenerateGenericArgs (int genericArgs)
{
if (genericArgs == 0)
return "";
string result = "<";
for (int i = 0; i < genericArgs; i++)
result += "int,";
return result.Remove (result.Length - 1) + ">";
}
void ReplaceType (string name, int genericArgs, int offset, int length, bool memberType = false)
{
string type;
if (genericArgs == 0)
type = session.ResolveIdentifierAsType (name, location);
else
type = session.ResolveIdentifierAsType (name + "`" + genericArgs, location);
if (string.IsNullOrEmpty (type)) {
parentType = null;
} else {
if (memberType) {
type = type.Substring (type.LastIndexOf ('.') + 1);
} else {
type = "global::" + type;
}
parentType = type + GenerateGenericArgs (genericArgs);
var replacement = new Replacement { Offset = offset, Length = length, NewText = type };
replacements.Add (replacement);
}
}
void ReplaceType (SyntaxNode type)
{
int length = type.Span.Length;
int offset = type.Span.Start;
ReplaceType (type.ToString(), 0, offset, length);
}
public override void VisitIdentifierName (IdentifierNameSyntax node)
{
base.VisitIdentifierName (node);
int length = node.Span.Length;
int offset = node.Span.Start;
ReplaceType (node.Identifier.ValueText, node.Arity, offset, length);
}
public override void VisitSimpleBaseType (SimpleBaseTypeSyntax node)
{
ReplaceType (node);
}
public override void VisitPredefinedType (PredefinedTypeSyntax node)
{
ReplaceType (node);
}
}
}
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