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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.Concurrent;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using ICSharpCode.NRefactory.CSharp.Resolver;
using ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;
using ICSharpCode.NRefactory.Utils;
namespace ICSharpCode.NRefactory.CSharp.TypeSystem
{
/// <summary>
/// Resolved version of using scope.
/// </summary>
public class ResolvedUsingScope
{
readonly CSharpTypeResolveContext parentContext;
readonly UsingScope usingScope;
internal readonly ConcurrentDictionary<string, ResolveResult> ResolveCache = new ConcurrentDictionary<string, ResolveResult>();
internal List<List<IMethod>> AllExtensionMethods;
public ResolvedUsingScope(CSharpTypeResolveContext context, UsingScope usingScope)
{
if (context == null)
throw new ArgumentNullException("context");
if (usingScope == null)
throw new ArgumentNullException("usingScope");
this.parentContext = context;
this.usingScope = usingScope;
if (usingScope.Parent != null) {
if (context.CurrentUsingScope == null)
throw new InvalidOperationException();
} else {
if (context.CurrentUsingScope != null)
throw new InvalidOperationException();
}
}
public UsingScope UnresolvedUsingScope {
get { return usingScope; }
}
INamespace @namespace;
public INamespace Namespace {
get {
INamespace result = LazyInit.VolatileRead(ref this.@namespace);
if (result != null) {
return result;
} else {
if (parentContext.CurrentUsingScope != null) {
result = parentContext.CurrentUsingScope.Namespace.GetChildNamespace(usingScope.ShortNamespaceName);
if (result == null)
result = new DummyNamespace(parentContext.CurrentUsingScope.Namespace, usingScope.ShortNamespaceName);
} else {
result = parentContext.Compilation.RootNamespace;
}
Debug.Assert(result != null);
return LazyInit.GetOrSet(ref this.@namespace, result);
}
}
}
public ResolvedUsingScope Parent {
get { return parentContext.CurrentUsingScope; }
}
IList<INamespace> usings;
public IList<INamespace> Usings {
get {
var result = LazyInit.VolatileRead(ref this.usings);
if (result != null) {
return result;
} else {
result = new List<INamespace>();
CSharpResolver resolver = new CSharpResolver(parentContext.WithUsingScope(this));
foreach (var u in usingScope.Usings) {
INamespace ns = u.ResolveNamespace(resolver);
if (ns != null && !result.Contains(ns))
result.Add(ns);
}
return LazyInit.GetOrSet(ref this.usings, new ReadOnlyCollection<INamespace>(result));
}
}
}
IList<KeyValuePair<string, ResolveResult>> usingAliases;
public IList<KeyValuePair<string, ResolveResult>> UsingAliases {
get {
var result = LazyInit.VolatileRead(ref this.usingAliases);
if (result != null) {
return result;
} else {
CSharpResolver resolver = new CSharpResolver(parentContext.WithUsingScope(this));
result = new KeyValuePair<string, ResolveResult>[usingScope.UsingAliases.Count];
for (int i = 0; i < result.Count; i++) {
var rr = usingScope.UsingAliases[i].Value.Resolve(resolver);
if (rr is TypeResolveResult) {
rr = new AliasTypeResolveResult (usingScope.UsingAliases[i].Key, (TypeResolveResult)rr);
} else if (rr is NamespaceResolveResult) {
rr = new AliasNamespaceResolveResult (usingScope.UsingAliases[i].Key, (NamespaceResolveResult)rr);
}
result[i] = new KeyValuePair<string, ResolveResult>(
usingScope.UsingAliases[i].Key,
rr
);
}
return LazyInit.GetOrSet(ref this.usingAliases, result);
}
}
}
public IList<string> ExternAliases {
get { return usingScope.ExternAliases; }
}
/// <summary>
/// Gets whether this using scope has an alias (either using or extern)
/// with the specified name.
/// </summary>
public bool HasAlias(string identifier)
{
return usingScope.HasAlias(identifier);
}
sealed class DummyNamespace : INamespace
{
readonly INamespace parentNamespace;
readonly string name;
public DummyNamespace(INamespace parentNamespace, string name)
{
this.parentNamespace = parentNamespace;
this.name = name;
}
public string ExternAlias { get; set; }
string INamespace.FullName {
get { return NamespaceDeclaration.BuildQualifiedName(parentNamespace.FullName, name); }
}
public string Name {
get { return name; }
}
SymbolKind ISymbol.SymbolKind {
get { return SymbolKind.Namespace; }
}
INamespace INamespace.ParentNamespace {
get { return parentNamespace; }
}
IEnumerable<INamespace> INamespace.ChildNamespaces {
get { return EmptyList<INamespace>.Instance; }
}
IEnumerable<ITypeDefinition> INamespace.Types {
get { return EmptyList<ITypeDefinition>.Instance; }
}
IEnumerable<IAssembly> INamespace.ContributingAssemblies {
get { return EmptyList<IAssembly>.Instance; }
}
ICompilation ICompilationProvider.Compilation {
get { return parentNamespace.Compilation; }
}
INamespace INamespace.GetChildNamespace(string name)
{
return null;
}
ITypeDefinition INamespace.GetTypeDefinition(string name, int typeParameterCount)
{
return null;
}
}
}
}
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