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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 ICSharpCode.NRefactory.CSharp;
using Mono.Debugging.Client;
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 : DepthFirstAstVisitor
{
readonly List<Replacement> replacements = new List<Replacement> ();
readonly SourceLocation location;
readonly DebuggerSession session;
readonly string expression;
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 ((Replacement r1, Replacement r2) => r1.Offset.CompareTo (r2.Offset));
StringBuilder sb = new StringBuilder ();
int i = 0;
foreach (Replacement r in replacements) {
sb.Append (expression, i, r.Offset - i);
sb.Append (r.NewText);
i = r.Offset + r.Length;
}
Replacement last = replacements [replacements.Count - 1];
sb.Append (expression, last.Offset + last.Length, expression.Length - (last.Offset + last.Length));
return sb.ToString ();
}
void ReplaceType (string name, int offset, int length)
{
string type = session.ResolveIdentifierAsType (name, location);
if (!string.IsNullOrEmpty (type)) {
type = "global::" + type;
Replacement r = new Replacement () { Offset = offset, Length = length, NewText = type };
replacements.Add (r);
}
}
void ReplaceType (AstType type)
{
int length = type.EndLocation.Column - type.StartLocation.Column;
int offset = type.StartLocation.Column - 1;
ReplaceType (type.ToString (), offset, length);
}
public override void VisitIdentifierExpression (IdentifierExpression identifierExpression)
{
base.VisitIdentifierExpression (identifierExpression);
int length = identifierExpression.EndLocation.Column - identifierExpression.StartLocation.Column;
int offset = identifierExpression.StartLocation.Column - 1;
ReplaceType (identifierExpression.Identifier, offset, length);
}
public override void VisitTypeReferenceExpression (TypeReferenceExpression typeReferenceExpression)
{
ReplaceType (typeReferenceExpression.Type);
}
public override void VisitComposedType (ComposedType composedType)
{
// Note: we specifically do not handle this case because the 'base' implementation will eventually
// call VisitMemberType() or VisitSimpleType() on the ComposedType.BaseType which is all we really
// care to resolve.
base.VisitComposedType (composedType);
}
public override void VisitMemberType (MemberType memberType)
{
ReplaceType (memberType);
}
public override void VisitSimpleType (SimpleType simpleType)
{
ReplaceType (simpleType);
}
}
}
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