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Viewing changes to external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/CreateOverloadWithoutParameterAction.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/CreateOverloadWithoutParameterAction.cs
 
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// 
 
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// CreateOverloadWithoutParameterAction.cs
 
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//  
 
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// Author:
 
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//       Mansheng Yang <lightyang0@gmail.com>
 
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// 
 
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// Copyright (c) 2012 Mansheng Yang <lightyang0@gmail.com>
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy
 
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// of this software and associated documentation files (the "Software"), to deal
 
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// in the Software without restriction, including without limitation the rights
 
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
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// copies of the Software, and to permit persons to whom the Software is
 
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// furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in
 
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// all copies or substantial portions of the Software.
 
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// 
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
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// THE SOFTWARE.
 
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using System.Collections.Generic;
 
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using System.Linq;
 
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using ICSharpCode.NRefactory.Semantics;
 
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using ICSharpCode.NRefactory.TypeSystem;
 
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namespace ICSharpCode.NRefactory.CSharp.Refactoring
 
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{
 
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        [ContextAction ("Create overload without parameter", Description = "Create overload without the selected parameter.")]
 
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        public class CreateOverloadWithoutParameterAction : SpecializedCodeAction<ParameterDeclaration>
 
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        {
 
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                protected override CodeAction GetAction (RefactoringContext context, ParameterDeclaration node)
 
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                {
 
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                        if (!node.DefaultExpression.IsNull)
 
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                                return null;
 
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                        if (node.ParameterModifier == ParameterModifier.This || node.ParameterModifier == ParameterModifier.Params)
 
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                                return null;
 
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                        var methodDecl = node.Parent as MethodDeclaration;
 
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                        if (methodDecl == null)
 
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                                return null;
 
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                        // explicit implementation
 
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                        if (!methodDecl.PrivateImplementationType.IsNull)
 
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                                return null;
 
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                        // find existing method
 
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                        var method = (IMethod)((MemberResolveResult)context.Resolve (methodDecl)).Member;
 
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                        var parameters = new List<IParameter> (method.Parameters.Where (param => param.Name != node.Name));
 
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                        if (method.DeclaringType.GetMethods (
 
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                                m => m.Name == method.Name && m.TypeParameters.Count == method.TypeParameters.Count)
 
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                                .Any (m => ParameterListComparer.Instance.Equals (m.Parameters, parameters)))
 
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                                return null;
 
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                        return new CodeAction (context.TranslateString ("Create overload without parameter"),
 
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                                script =>
 
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                                {
 
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                                        var defaultExpr = GetDefaultValueExpression (context, node.Type);
 
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                                        var body = new BlockStatement ();
 
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                                        Expression argExpr;
 
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                                        if (node.ParameterModifier == ParameterModifier.Ref) {
 
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                                                body.Add (new VariableDeclarationStatement (node.Type.Clone (), node.Name, defaultExpr));
 
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                                                argExpr = GetArgumentExpression (node);
 
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                                        } else if (node.ParameterModifier == ParameterModifier.Out) {
 
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                                                body.Add (new VariableDeclarationStatement (node.Type.Clone (), node.Name));
 
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                                                argExpr = GetArgumentExpression (node);
 
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                                        } else {
 
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                                                argExpr = defaultExpr;
 
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                                        }
 
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                                        body.Add (new InvocationExpression (new IdentifierExpression (methodDecl.Name),
 
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                                                methodDecl.Parameters.Select (param => param == node ? argExpr : GetArgumentExpression(param))));
 
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                                        var decl = (MethodDeclaration)methodDecl.Clone ();
 
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                                        decl.Parameters.Remove (decl.Parameters.First (param => param.Name == node.Name));
 
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                                        decl.Body = body;
 
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                                        script.InsertWithCursor ("Create overload without parameter", Script.InsertPosition.Before, decl);
 
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                                        //if (node.ParameterModifier != ParameterModifier.Out)
 
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                                        //    script.Link (defaultExpr);
 
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                                }, node.NameToken); 
 
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                }
 
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                static Expression GetArgumentExpression(ParameterDeclaration parameter)
 
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                {
 
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                        var identifierExpr = new IdentifierExpression(parameter.Name);
 
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                        switch (parameter.ParameterModifier) {
 
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                                case ParameterModifier.Out:
 
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                                        return new DirectionExpression (FieldDirection.Out, identifierExpr);
 
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                                case ParameterModifier.Ref:
 
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                                        return new DirectionExpression (FieldDirection.Ref, identifierExpr);
 
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                        }
 
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                        return identifierExpr;
 
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                }
 
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                static Expression GetDefaultValueExpression (RefactoringContext context, AstType astType)
 
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                {
 
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                        var type = context.ResolveType (astType);
 
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                        // array
 
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                        if (type.Kind == TypeKind.Array)
 
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                                return new ObjectCreateExpression (astType.Clone ());
 
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                        // enum
 
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                        if (type.Kind == TypeKind.Enum) {
 
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                                var members = type.GetMembers ().ToArray();
 
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                                if (members.Length == 0)
 
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                                        return new DefaultValueExpression (astType.Clone ());
 
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                                return astType.Member(members[0].Name).Clone ();
 
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                        }
 
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                        if ((type.IsReferenceType ?? false) || type.Kind == TypeKind.Dynamic)
 
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                                return new NullReferenceExpression ();
 
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                        var typeDefinition = type.GetDefinition ();
 
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                        if (typeDefinition != null) {
 
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                                switch (typeDefinition.KnownTypeCode) {
 
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                                        case KnownTypeCode.Boolean:
 
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                                                return new PrimitiveExpression (false);
 
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                                        case KnownTypeCode.Char:
 
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                                                return new PrimitiveExpression ('\0');
 
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                                        case KnownTypeCode.SByte:
 
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                                        case KnownTypeCode.Byte:
 
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                                        case KnownTypeCode.Int16:
 
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                                        case KnownTypeCode.UInt16:
 
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                                        case KnownTypeCode.Int32:
 
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                                        case KnownTypeCode.UInt32:
 
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                                        case KnownTypeCode.Int64:
 
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                                        case KnownTypeCode.UInt64:
 
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                                        case KnownTypeCode.Single:
 
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                                        case KnownTypeCode.Double:
 
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                                        case KnownTypeCode.Decimal:
 
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                                                return new PrimitiveExpression (0);
 
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                                        case KnownTypeCode.NullableOfT:
 
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                                                return new NullReferenceExpression ();
 
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                                }
 
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                                if (type.Kind == TypeKind.Struct)
 
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                                        return new ObjectCreateExpression (astType.Clone ());
 
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                        }
 
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                        return new DefaultValueExpression (astType.Clone ());
 
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                }
 
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        }
 
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}