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using Mono.Cecil;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
namespace IPA.Injector
{
internal class VirtualizedModule
{
private const string ENTRY_TYPE = "Display";
public FileInfo file;
public ModuleDefinition module;
public static VirtualizedModule Load(string engineFile)
{
return new VirtualizedModule(engineFile);
}
private VirtualizedModule(string assemblyFile)
{
file = new FileInfo(assemblyFile);
LoadModules();
}
private void LoadModules()
{
module = ModuleDefinition.ReadModule(file.FullName);
}
/// <summary>
///
/// </summary>
/// <param name="module"></param>
public void Virtualize(AssemblyName selfName, Action beforeChangeCallback = null)
{
bool changed = false;
bool virtualize = true;
foreach (var r in module.AssemblyReferences)
{
if (r.Name == selfName.Name)
{
virtualize = false;
if (r.Version != selfName.Version)
{
r.Version = selfName.Version;
changed = true;
}
}
}
if (virtualize)
{
changed = true;
module.AssemblyReferences.Add(new AssemblyNameReference(selfName.Name, selfName.Version));
foreach (var type in module.Types)
{
VirtualizeType(type);
}
}
if (changed)
{
beforeChangeCallback?.Invoke();
module.Write(file.FullName);
}
}
private void VirtualizeType(TypeDefinition type)
{
if(type.IsSealed)
{
// Unseal
type.IsSealed = false;
}
if (type.IsInterface) return;
if (type.IsAbstract) return;
// These two don't seem to work.
if (type.Name == "SceneControl" || type.Name == "ConfigUI") return;
// Take care of sub types
foreach (var subType in type.NestedTypes)
{
VirtualizeType(subType);
}
foreach (var method in type.Methods)
{
if (method.IsManaged
&& method.IsIL
&& !method.IsStatic
&& !method.IsVirtual
&& !method.IsAbstract
&& !method.IsAddOn
&& !method.IsConstructor
&& !method.IsSpecialName
&& !method.IsGenericInstance
&& !method.HasOverrides)
{
method.IsVirtual = true;
method.IsPublic = true;
method.IsPrivate = false;
method.IsNewSlot = true;
method.IsHideBySig = true;
}
}
foreach (var field in type.Fields)
{
if (field.IsPrivate) field.IsFamily = true;
}
}
}
}