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Viewing changes to contrib/ICSharpCode.NRefactory.CSharp/TypeSystem/UsingScope.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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contrib/ICSharpCode.NRefactory.CSharp/TypeSystem/UsingScope.cs
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is 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 all copies or
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// 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 IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using ICSharpCode.NRefactory.CSharp.TypeSystem;
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using ICSharpCode.NRefactory.TypeSystem;
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using ICSharpCode.NRefactory.TypeSystem.Implementation;
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using ICSharpCode.NRefactory.Utils;
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namespace ICSharpCode.NRefactory.CSharp.TypeSystem
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{
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        /// <summary>
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        /// Represents a scope that contains "using" statements.
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        /// This is either the file itself, or a namespace declaration.
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        /// </summary>
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        [Serializable]
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        public class UsingScope : AbstractFreezable
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        {
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                readonly UsingScope parent;
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                DomRegion region;
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                string shortName = "";
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                IList<TypeOrNamespaceReference> usings;
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                IList<KeyValuePair<string, TypeOrNamespaceReference>> usingAliases;
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                IList<string> externAliases;
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                protected override void FreezeInternal()
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                {
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                        usings = FreezableHelper.FreezeList(usings);
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                        usingAliases = FreezableHelper.FreezeList(usingAliases);
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                        externAliases = FreezableHelper.FreezeList(externAliases);
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                        // In current model (no child scopes), it makes sense to freeze the parent as well
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                        // to ensure the whole lookup chain is immutable.
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                        if (parent != null)
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                                parent.Freeze();
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                        base.FreezeInternal();
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                }
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                /// <summary>
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                /// Creates a new root using scope.
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                /// </summary>
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                public UsingScope()
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                {
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                }
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                /// <summary>
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                /// Creates a new nested using scope.
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                /// </summary>
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                /// <param name="parent">The parent using scope.</param>
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                /// <param name="shortName">The short namespace name.</param>
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                public UsingScope(UsingScope parent, string shortName)
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                {
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                        if (parent == null)
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                                throw new ArgumentNullException("parent");
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                        if (shortName == null)
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                                throw new ArgumentNullException("shortName");
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                        this.parent = parent;
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                        this.shortName = shortName;
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                }
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                public UsingScope Parent {
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                        get { return parent; }
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                }
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                public DomRegion Region {
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                        get { return region; }
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                        set {
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                                FreezableHelper.ThrowIfFrozen(this);
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                                region = value;
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                        }
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                }
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                public string ShortNamespaceName {
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                        get {
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                                return shortName;
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                        }
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                }
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                public string NamespaceName {
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                        get {
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                                if (parent != null)
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                                        return NamespaceDeclaration.BuildQualifiedName(parent.NamespaceName, shortName);
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                                else
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                                        return shortName;
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                        }
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//                      set {
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//                              if (value == null)
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//                                      throw new ArgumentNullException("NamespaceName");
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//                              FreezableHelper.ThrowIfFrozen(this);
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//                              namespaceName = value;
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//                      }
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                }
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                public IList<TypeOrNamespaceReference> Usings {
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                        get {
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                                if (usings == null)
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                                        usings = new List<TypeOrNamespaceReference>();
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                                return usings;
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                        }
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                }
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                public IList<KeyValuePair<string, TypeOrNamespaceReference>> UsingAliases {
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                        get {
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                                if (usingAliases == null)
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                                        usingAliases = new List<KeyValuePair<string, TypeOrNamespaceReference>>();
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                                return usingAliases;
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                        }
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                }
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                public IList<string> ExternAliases {
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                        get {
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                                if (externAliases == null)
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                                        externAliases = new List<string>();
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                                return externAliases;
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                        }
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                }
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//              public IList<UsingScope> ChildScopes {
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//                      get {
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//                              if (childScopes == null)
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//                                      childScopes = new List<UsingScope>();
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//                              return childScopes;
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//                      }
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//              }
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                /// <summary>
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                /// Gets whether this using scope has an alias (either using or extern)
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                /// with the specified name.
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                /// </summary>
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                public bool HasAlias(string identifier)
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                {
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                        if (usingAliases != null) {
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                                foreach (var pair in usingAliases) {
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                                        if (pair.Key == identifier)
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                                                return true;
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                                }
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                        }
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                        return externAliases != null && externAliases.Contains(identifier);
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                }
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                /// <summary>
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                /// Resolves the namespace represented by this using scope.
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                /// </summary>
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                public ResolvedUsingScope Resolve(ICompilation compilation)
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                {
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                        CacheManager cache = compilation.CacheManager;
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                        ResolvedUsingScope resolved = cache.GetShared(this) as ResolvedUsingScope;
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                        if (resolved == null) {
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                                var csContext = new CSharpTypeResolveContext(compilation.MainAssembly, parent != null ? parent.Resolve(compilation) : null);
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                                resolved = (ResolvedUsingScope)cache.GetOrAddShared(this, new ResolvedUsingScope(csContext, this));
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                        }
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                        return resolved;
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                }
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        }
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}