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Viewing changes to external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/RedundantNamespaceUsageIssue.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/RedundantNamespaceUsageIssue.cs
 
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// 
 
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// RedundantNamespaceUsageInspector.cs
 
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//
 
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// Author:
 
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//       Mike Krüger <mkrueger@xamarin.com>
 
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// 
 
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// Copyright (c) 2012 Xamarin <http://xamarin.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;
 
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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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        /// <summary>
 
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        /// Finds redundant namespace usages.
 
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        /// </summary>
 
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        [IssueDescription("Remove redundant namespace usages",
 
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                          Description = "Removes namespace usages that are obsolete.",
 
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                          Category = IssueCategories.Redundancies,
 
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                          Severity = Severity.Hint,
 
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                          IssueMarker = IssueMarker.GrayOut)]
 
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        public class RedundantNamespaceUsageIssue : ICodeIssueProvider
 
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        {
 
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                public IEnumerable<CodeIssue> GetIssues(BaseRefactoringContext context)
 
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                {
 
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                        return new GatherVisitor(context, this).GetIssues();
 
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                }
 
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                class GatherVisitor : GatherVisitorBase<RedundantNamespaceUsageIssue>
 
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                {
 
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                        public GatherVisitor (BaseRefactoringContext ctx, RedundantNamespaceUsageIssue issueProvider) : base (ctx, issueProvider)
 
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                        {
 
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                        }
 
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                        public override void VisitMemberReferenceExpression(MemberReferenceExpression memberReferenceExpression)
 
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                        {
 
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                                base.VisitMemberReferenceExpression(memberReferenceExpression);
 
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                                HandleMemberReference(
 
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                                        memberReferenceExpression, memberReferenceExpression.Target, memberReferenceExpression.MemberNameToken, memberReferenceExpression.TypeArguments, NameLookupMode.Expression,
 
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                                        script => {
 
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                                                script.Replace(memberReferenceExpression, RefactoringAstHelper.RemoveTarget(memberReferenceExpression));
 
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                                        });
 
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                        }
 
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                        public override void VisitMemberType(MemberType memberType)
 
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                        {
 
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                                base.VisitMemberType(memberType);
 
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                                HandleMemberReference(
 
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                                        memberType, memberType.Target, memberType.MemberNameToken, memberType.TypeArguments, memberType.GetNameLookupMode(),
 
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                                        script => {
 
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                                                script.Replace(memberType, RefactoringAstHelper.RemoveTarget(memberType));
 
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                                        });
 
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                        }
 
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                        void HandleMemberReference(AstNode wholeNode, AstNode targetNode, Identifier memberName, IEnumerable<AstType> typeArguments, NameLookupMode mode, Action<Script> action)
 
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                        {
 
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                                var result = ctx.Resolve(targetNode);
 
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                                if (!(result is NamespaceResolveResult)) {
 
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                                        return;
 
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                                }
 
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                                var wholeResult = ctx.Resolve(wholeNode);
 
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                                if (!(wholeResult is TypeResolveResult)) {
 
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                                        return;
 
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                                }
 
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                                var state = ctx.GetResolverStateBefore(wholeNode);
 
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                                var resolvedTypeArguments = typeArguments.Select(ctx.ResolveType).ToList();
 
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                                var lookupName = state.LookupSimpleNameOrTypeName(memberName.Name, resolvedTypeArguments, mode);
 
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                                if (lookupName is TypeResolveResult && !lookupName.IsError && wholeResult.Type.Equals(lookupName.Type)) {
 
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                                        AddIssue(wholeNode.StartLocation, memberName.StartLocation, ctx.TranslateString("Remove redundant namespace usage"), action);
 
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                                }
 
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                        }
 
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                }
 
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        }
 
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}