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// Copyright (c) 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 ICSharpCode.NRefactory.TypeSystem;
using System.Linq;
namespace ICSharpCode.NRefactory.Analysis
{
/// <summary>
/// The symbol collector collects related symbols that form a group of symbols that should be renamed
/// when a name of one symbol changes. For example if a type definition name should be changed
/// the constructors and destructor names should change as well.
/// </summary>
public class SymbolCollector
{
/// <summary>
/// Gets or sets a value indicating whether this <see cref="ICSharpCode.NRefactory.Analysis.SymbolCollector"/> should include overloads.
/// </summary>
/// <value><c>true</c> if overloads should be included; otherwise, <c>false</c>.</value>
public bool IncludeOverloads {
get;
set;
}
public bool GroupForRenaming {
get;
set;
}
static IEnumerable<ISymbol> CollectTypeRelatedMembers (ITypeDefinition type)
{
yield return type;
foreach (var c in type.GetDefinition ().GetMembers (m => !m.IsSynthetic && (m.SymbolKind == SymbolKind.Constructor || m.SymbolKind == SymbolKind.Destructor), GetMemberOptions.IgnoreInheritedMembers)) {
yield return c;
}
}
static IEnumerable<ISymbol> CollectOverloads (TypeGraph g, IMethod method)
{
return method.DeclaringType
.GetMethods (m => m.Name == method.Name)
.Where (m => m != method);
}
static IMember SearchMember (ITypeDefinition derivedType, IMember method)
{
foreach (var m in derivedType.Members) {
if (m.ImplementedInterfaceMembers.Contains (method))
return m;
}
return null;
}
static IEnumerable<ISymbol> MakeUnique (List<ISymbol> symbols)
{
HashSet<ISymbol> taken = new HashSet<ISymbol> ();
foreach (var sym in symbols) {
if (taken.Contains (sym))
continue;
taken.Add (sym);
yield return sym;
}
}
/// <summary>
/// Gets the related symbols.
/// </summary>
/// <returns>The related symbols.</returns>
/// <param name="g">The type graph.</param>
/// <param name="m">The symbol to search</param>
public IEnumerable<ISymbol> GetRelatedSymbols(TypeGraph g, ISymbol m)
{
switch (m.SymbolKind) {
case SymbolKind.TypeDefinition:
return CollectTypeRelatedMembers ((ITypeDefinition)m);
case SymbolKind.Field:
case SymbolKind.Operator:
case SymbolKind.Variable:
case SymbolKind.Parameter:
case SymbolKind.TypeParameter:
return new ISymbol[] { m };
case SymbolKind.Constructor:
if (GroupForRenaming)
return GetRelatedSymbols (g, ((IMethod)m).DeclaringTypeDefinition);
List<ISymbol> constructorSymbols = new List<ISymbol> ();
if (IncludeOverloads) {
foreach (var m3 in CollectOverloads (g, (IMethod)m)) {
constructorSymbols.Add (m3);
}
}
return constructorSymbols;
case SymbolKind.Destructor:
if (GroupForRenaming)
return GetRelatedSymbols (g, ((IMethod)m).DeclaringTypeDefinition);
return new ISymbol[] { m };
case SymbolKind.Indexer:
case SymbolKind.Event:
case SymbolKind.Property:
case SymbolKind.Method: {
var member = (IMember)m;
List<ISymbol> symbols = new List<ISymbol> ();
if (member.ImplementedInterfaceMembers.Count > 0) {
foreach (var m2 in member.ImplementedInterfaceMembers) {
symbols.AddRange (GetRelatedSymbols (g, m2));
}
} else {
symbols.Add (member);
}
if (member.DeclaringType.Kind == TypeKind.Interface) {
foreach (var derivedType in g.GetNode (member.DeclaringTypeDefinition).DerivedTypes) {
var mem = SearchMember (derivedType.TypeDefinition, member);
if (mem != null)
symbols.Add (mem);
}
}
if (IncludeOverloads) {
IncludeOverloads = false;
if (member is IMethod) {
foreach (var m3 in CollectOverloads (g, (IMethod)member)) {
symbols.AddRange (GetRelatedSymbols (g, m3));
}
} else if (member.SymbolKind == SymbolKind.Indexer) {
symbols.AddRange (member.DeclaringTypeDefinition.GetProperties (p => p.IsIndexer));
}
}
return MakeUnique (symbols);
}
case SymbolKind.Namespace:
// TODO?
return new ISymbol[] { m };
default:
throw new ArgumentOutOfRangeException ("symbol:"+m.SymbolKind);
}
}
}
}
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