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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Runtime.InteropServices;
using com.sun.star.uno.helper;
namespace com.sun.star.uno.native
{
internal class NetEnvironment
{
public InteropContext Context { get; }
private readonly Marshaller _marshaller;
private readonly WeakIndexTable _indices;
private readonly WeakOidTypeTable _locals;
private readonly WeakOidTypeTable _proxies;
private readonly string _oidSuffix;
private readonly Dictionary<int, string> _oids;
public NetEnvironment()
{
Context = new InteropContext()
{
createProxy = CreateProxy,
lookupObjectId = LookupOid,
registerInterface = RegisterInterface,
lookupInterface = LookupInterface,
revokeInterface = RevokeInterface,
dispatchCall = DispatchCall,
throwError = ThrowError,
};
_marshaller = new Marshaller(this);
_indices = new WeakIndexTable();
_locals = new WeakOidTypeTable();
_proxies = new WeakOidTypeTable();
_oidSuffix = $";net[0];{Guid.NewGuid()}";
_oids = new Dictionary<int, string>();
}
public IntPtr CreateProxy(string oid, string interfaceName,
IntPtr pBridge, IntPtr pUnoInterface, IntPtr pTypeDesc)
{
Type interfaceType = TypeHelper.ParseType(interfaceName);
object proxy = NativeUnoProxy.CreateProxy(oid, interfaceType,
pBridge, pUnoInterface, pTypeDesc, this);
int index = _indices.Register(proxy);
_oids.Add(index, oid);
_proxies.RegisterInterface(proxy, oid, interfaceType);
return (IntPtr)index;
}
public string LookupOid(IntPtr pObject) => _oids[(int)pObject];
public IntPtr RegisterInterface(IntPtr pObject, string pOid, string pInterfaceName)
{
Type interfaceType = TypeHelper.ParseType(pInterfaceName);
object obj = _indices.Lookup((int)pObject);
obj = (obj is NativeUnoProxy ? _proxies : _locals)
.RegisterInterface(obj, pOid, interfaceType);
return (IntPtr)_indices.Register(obj);
}
public IntPtr RegisterLocal(object obj, Type interfaceType)
{
int index = _indices.Register(obj);
if (!_oids.ContainsKey(index))
{
string oid = $"{index}{_oidSuffix}";
_oids.Add(index, oid);
}
_locals.RegisterInterface(obj, _oids[index], interfaceType);
return (IntPtr)index;
}
public IntPtr LookupInterface(string pOid, string pInterfaceName)
{
Type interfaceType = TypeHelper.ParseType(pInterfaceName);
return LookupInterface(pOid, interfaceType);
}
public IntPtr LookupInterface(string pOid, Type type)
{
object obj = _proxies.GetInterface(pOid, type)
?? _locals.GetInterface(pOid, type);
return (IntPtr)_indices.Register(obj);
}
public void RevokeInterface(string pOid, string pInterfaceName)
{
Type interfaceType = TypeHelper.ParseType(pInterfaceName);
if (!_proxies.RevokeInterface(pOid, interfaceType))
_locals.RevokeInterface(pOid, interfaceType);
}
public void ThrowError(string pWhere, string pMessage)
{
throw new RuntimeException($"{pMessage} at {pWhere}", null);
}
public object GetRegisteredObject(IntPtr pIndex)
{
return _indices.Lookup((int)pIndex);
}
public unsafe void ReleaseProxy(NativeUnoProxy nup,
IntPtr pBridge, IntPtr pUnoInterface, IntPtr pTypeDesc)
{
_oids.Remove(_indices.Register(nup));
_proxies.RevokeInterface(nup.Oid, nup.Type);
InteropMethods.releaseProxy(pBridge, pUnoInterface, pTypeDesc);
}
public unsafe object InvokeMethod(MethodInfo targetMethod, object[] args,
IntPtr bridgeHandle, IntPtr interfaceHandle, IntPtr typeHandle)
{
ParameterInfo[] parameters = targetMethod.GetParameters();
InteropValue* values = stackalloc InteropValue[parameters.Length + 2];
InteropValue* retVal = &values[parameters.Length];
InteropValue* excVal = &values[parameters.Length + 1];
for (int i = 0; i < parameters.Length; i++)
{
ParameterInfo param = parameters[i];
Type paramType = TypeHelper.RemoveReference(param.ParameterType);
bool isInOrInOut = !(param.ParameterType.IsByRef && param.IsOut);
if (isInOrInOut)
_marshaller.MarshalObject(paramType, args[i], &values[i], false);
}
bool error = InteropMethods.dispatchCall(
bridgeHandle, interfaceHandle, typeHandle,
targetMethod.Name, values, retVal, excVal) == 0;
for (int i = 0; i < parameters.Length; i++)
{
ParameterInfo param = parameters[i];
Type paramType = TypeHelper.RemoveReference(param.ParameterType);
bool isInOutOrOut = param.ParameterType.IsByRef;
if (isInOutOrOut)
_marshaller.UnmarshalObject(paramType, ref args[i], &values[i], true);
}
if (error)
{
object exception = null;
_marshaller.UnmarshalObject(typeof(Any), ref exception, excVal, true);
throw (Exception)((Any)exception).Value;
}
if (targetMethod.ReturnType != typeof(void))
{
object result = null;
_marshaller.UnmarshalObject(targetMethod.ReturnType, ref result, retVal, true);
return result;
}
return null;
}
public unsafe byte DispatchCall(IntPtr pNetInterface, string pMethodName,
IntPtr pArgs, IntPtr pRet, IntPtr pExc)
{
try
{
int methodNameStart = pMethodName.IndexOf(':') + 2;
int methodNameEnd = pMethodName.IndexOf(':', methodNameStart);
if (methodNameEnd > methodNameStart)
pMethodName = pMethodName.Substring(methodNameStart, methodNameEnd - methodNameStart);
else
pMethodName = pMethodName.Substring(methodNameStart);
object target = _indices.Lookup((int)pNetInterface);
if (target == null)
throw new RuntimeException($"{pMethodName} was called on a null or unregistered interface", null);
Type targetType = target.GetType();
MethodInfo targetMethod = targetType.GetMethod(pMethodName,
BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (targetMethod == null)
throw new RuntimeException($"could not find method {pMethodName} on interface {target.GetType()}", null);
ParameterInfo[] parameters = targetMethod.GetParameters();
object[] args = new object[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
ParameterInfo param = parameters[i];
Type paramType = TypeHelper.RemoveReference(param.ParameterType);
bool isInOrInOut = !(param.ParameterType.IsByRef && param.IsOut);
if (isInOrInOut)
_marshaller.UnmarshalObject(paramType, ref args[i], &((InteropValue*)(void*)pArgs)[i], true);
}
object ret = targetMethod.Invoke(target, args);
for (int i = 0; i < parameters.Length; i++)
{
ParameterInfo param = parameters[i];
Type paramType = TypeHelper.RemoveReference(param.ParameterType);
bool isInOutOrOut = param.ParameterType.IsByRef;
if (isInOutOrOut)
_marshaller.MarshalObject(paramType, args[i], &((InteropValue*)(void*)pArgs)[i], false);
}
if (targetMethod.ReturnType != typeof(void))
_marshaller.MarshalObject(targetMethod.ReturnType, ret, (InteropValue*)(void*)pRet, false);
return 1;
}
catch (Exception exception)
{
_marshaller.MarshalObject(typeof(Any), new Any(exception.InnerException),
(InteropValue*)(void*)pExc, false);
return 0;
}
}
}
}
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