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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
//
// 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.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using ICSharpCode.NRefactory.CSharp.TypeSystem;
using ICSharpCode.NRefactory.TypeSystem;
using ICSharpCode.NRefactory.TypeSystem.Implementation;
using ICSharpCode.NRefactory.Utils;
namespace ICSharpCode.NRefactory.CSharp.TypeSystem
{
/// <summary>
/// Represents a scope that contains "using" statements.
/// This is either the file itself, or a namespace declaration.
/// </summary>
[Serializable]
public class UsingScope : AbstractFreezable
{
readonly UsingScope parent;
DomRegion region;
string shortName = "";
IList<TypeOrNamespaceReference> usings;
IList<KeyValuePair<string, TypeOrNamespaceReference>> usingAliases;
IList<string> externAliases;
protected override void FreezeInternal()
{
usings = FreezableHelper.FreezeList(usings);
usingAliases = FreezableHelper.FreezeList(usingAliases);
externAliases = FreezableHelper.FreezeList(externAliases);
// In current model (no child scopes), it makes sense to freeze the parent as well
// to ensure the whole lookup chain is immutable.
if (parent != null)
parent.Freeze();
base.FreezeInternal();
}
/// <summary>
/// Creates a new root using scope.
/// </summary>
public UsingScope()
{
}
/// <summary>
/// Creates a new nested using scope.
/// </summary>
/// <param name="parent">The parent using scope.</param>
/// <param name="shortName">The short namespace name.</param>
public UsingScope(UsingScope parent, string shortName)
{
if (parent == null)
throw new ArgumentNullException("parent");
if (shortName == null)
throw new ArgumentNullException("shortName");
this.parent = parent;
this.shortName = shortName;
}
public UsingScope Parent {
get { return parent; }
}
public DomRegion Region {
get { return region; }
set {
FreezableHelper.ThrowIfFrozen(this);
region = value;
}
}
public string ShortNamespaceName {
get {
return shortName;
}
}
public string NamespaceName {
get {
if (parent != null)
return NamespaceDeclaration.BuildQualifiedName(parent.NamespaceName, shortName);
else
return shortName;
}
// set {
// if (value == null)
// throw new ArgumentNullException("NamespaceName");
// FreezableHelper.ThrowIfFrozen(this);
// namespaceName = value;
// }
}
public IList<TypeOrNamespaceReference> Usings {
get {
if (usings == null)
usings = new List<TypeOrNamespaceReference>();
return usings;
}
}
public IList<KeyValuePair<string, TypeOrNamespaceReference>> UsingAliases {
get {
if (usingAliases == null)
usingAliases = new List<KeyValuePair<string, TypeOrNamespaceReference>>();
return usingAliases;
}
}
public IList<string> ExternAliases {
get {
if (externAliases == null)
externAliases = new List<string>();
return externAliases;
}
}
// public IList<UsingScope> ChildScopes {
// get {
// if (childScopes == null)
// childScopes = new List<UsingScope>();
// return childScopes;
// }
// }
/// <summary>
/// Gets whether this using scope has an alias (either using or extern)
/// with the specified name.
/// </summary>
public bool HasAlias(string identifier)
{
if (usingAliases != null) {
foreach (var pair in usingAliases) {
if (pair.Key == identifier)
return true;
}
}
return externAliases != null && externAliases.Contains(identifier);
}
/// <summary>
/// Resolves the namespace represented by this using scope.
/// </summary>
public ResolvedUsingScope Resolve(ICompilation compilation)
{
CacheManager cache = compilation.CacheManager;
ResolvedUsingScope resolved = cache.GetShared(this) as ResolvedUsingScope;
if (resolved == null) {
var csContext = new CSharpTypeResolveContext(compilation.MainAssembly, parent != null ? parent.Resolve(compilation) : null);
resolved = (ResolvedUsingScope)cache.GetOrAddShared(this, new ResolvedUsingScope(csContext, this));
}
return resolved;
}
}
}
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