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Viewing changes to external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/VariableHidesMemberIssue/VariableHidesMemberIssue.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/CodeIssues/VariableHidesMemberIssue/VariableHidesMemberIssue.cs
 
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// 
 
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// VariableHidesMemberIssue.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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using System;
 
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namespace ICSharpCode.NRefactory.CSharp.Refactoring
 
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{
 
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        public abstract class VariableHidesMemberIssue : ICodeIssueProvider
 
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        {
 
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                public abstract IEnumerable<CodeIssue> GetIssues(BaseRefactoringContext context);
 
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                protected static bool HidesMember(BaseRefactoringContext ctx, AstNode node, string variableName)
 
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                {
 
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                        var typeDecl = node.GetParent<TypeDeclaration>();
 
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                        if (typeDecl == null)
 
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                                return false;
 
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                        var entityDecl = node.GetParent<EntityDeclaration>();
 
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                        var memberResolveResult = ctx.Resolve(entityDecl) as MemberResolveResult;
 
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                        if (memberResolveResult == null)
 
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                                return false;
 
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                        var typeResolveResult = ctx.Resolve(typeDecl) as TypeResolveResult;
 
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                        if (typeResolveResult == null)
 
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                                return false;
 
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                        var sourceMember = memberResolveResult.Member;
 
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                        return typeResolveResult.Type.GetMembers(m => m.Name == variableName).Any(m2 => IsAccessible(sourceMember, m2));
 
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                }
 
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                static bool IsAccessible(IMember sourceMember, IMember targetMember)
 
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                {
 
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                        if (sourceMember.IsStatic != targetMember.IsStatic)
 
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                                return false;
 
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                        var sourceType = sourceMember.DeclaringType;
 
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                        var targetType = targetMember.DeclaringType;
 
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                        switch (targetMember.Accessibility) {
 
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                                case Accessibility.None:
 
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                                        return false;
 
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                                case Accessibility.Private:
 
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                                        // check for members of outer classes (private members of outer classes can be accessed)
 
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                                        var targetTypeDefinition = targetType.GetDefinition();
 
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                                        for (var t = sourceType.GetDefinition(); t != null; t = t.DeclaringTypeDefinition) {
 
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                                                if (t.Equals(targetTypeDefinition))
 
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                                                        return true;
 
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                                        }
 
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                                        return false;
 
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                                case Accessibility.Public:
 
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                                        return true;
 
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                                case Accessibility.Protected:
 
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                                        return IsProtectedAccessible(sourceType, targetType);
 
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                                case Accessibility.Internal:
 
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                                        return IsInternalAccessible(sourceMember.ParentAssembly, targetMember.ParentAssembly);
 
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                                case Accessibility.ProtectedOrInternal:
 
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                                        return IsInternalAccessible(sourceMember.ParentAssembly, targetMember.ParentAssembly) || IsProtectedAccessible(sourceType, targetType);
 
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                                case Accessibility.ProtectedAndInternal:
 
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                                        return IsInternalAccessible(sourceMember.ParentAssembly, targetMember.ParentAssembly) && IsProtectedAccessible(sourceType, targetType);
 
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                                default:
 
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                                        throw new Exception("Invalid value for Accessibility");
 
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                        }
 
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                }
 
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                static bool IsProtectedAccessible(IType sourceType, IType targetType)
 
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                {
 
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                        return sourceType.GetAllBaseTypes().Any(type => targetType.Equals(type));
 
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                }
 
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                static bool IsInternalAccessible(IAssembly sourceAssembly, IAssembly targetAssembly)
 
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                {
 
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                        return sourceAssembly.InternalsVisibleTo(targetAssembly);
 
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                }
 
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        }
 
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}