private static ComTypes.ITypeInfo GetCoClassTypeInfo(object rcw, ComTypes.ITypeInfo typeInfo)
{
Debug.Assert(typeInfo != null);
IProvideClassInfo provideClassInfo = rcw as IProvideClassInfo;
if (provideClassInfo != null)
{
IntPtr typeInfoPtr = IntPtr.Zero;
try {
provideClassInfo.GetClassInfo(out typeInfoPtr);
if (typeInfoPtr != IntPtr.Zero)
{
return(Marshal.GetObjectForIUnknown(typeInfoPtr) as ComTypes.ITypeInfo);
}
} finally {
if (typeInfoPtr != IntPtr.Zero)
{
Marshal.Release(typeInfoPtr);
}
}
}
// retrieving class information through IPCI has failed -
// we can try scanning the typelib to find the coclass
ComTypes.ITypeLib typeLib;
int typeInfoIndex;
typeInfo.GetContainingTypeLib(out typeLib, out typeInfoIndex);
string typeName = ComRuntimeHelpers.GetNameOfType(typeInfo);
ComTypeLibDesc typeLibDesc = ComTypeLibDesc.GetFromTypeLib(typeLib);
ComTypeClassDesc coclassDesc = typeLibDesc.GetCoClassForInterface(typeName);
if (coclassDesc == null)
{
return(null);
}
ComTypes.ITypeInfo typeInfoCoClass;
Guid coclassGuid = coclassDesc.Guid;
typeLib.GetTypeInfoOfGuid(ref coclassGuid, out typeInfoCoClass);
return(typeInfoCoClass);
}
internal static ComTypeLibDesc GetFromTypeLib(ComTypes.ITypeLib typeLib)
{
// check whether we have already loaded this type library
ComTypes.TYPELIBATTR typeLibAttr = ComRuntimeHelpers.GetTypeAttrForTypeLib(typeLib);
ComTypeLibDesc typeLibDesc;
lock (_CachedTypeLibDesc) {
if (_CachedTypeLibDesc.TryGetValue(typeLibAttr.guid, out typeLibDesc))
{
return(typeLibDesc);
}
}
typeLibDesc = new ComTypeLibDesc();
typeLibDesc._typeLibName = ComRuntimeHelpers.GetNameOfLib(typeLib);
int countTypes = typeLib.GetTypeInfoCount();
for (int i = 0; i < countTypes; i++)
{
ComTypes.TYPEKIND typeKind;
typeLib.GetTypeInfoType(i, out typeKind);
ComTypes.ITypeInfo typeInfo;
if (typeKind == ComTypes.TYPEKIND.TKIND_COCLASS)
{
typeLib.GetTypeInfo(i, out typeInfo);
ComTypeClassDesc classDesc = new ComTypeClassDesc(typeInfo);
typeLibDesc._classes.AddLast(classDesc);
}
else if (typeKind == ComTypes.TYPEKIND.TKIND_ENUM)
{
typeLib.GetTypeInfo(i, out typeInfo);
ComTypeEnumDesc enumDesc = new ComTypeEnumDesc(typeInfo);
typeLibDesc._enums.Add(enumDesc.TypeName, enumDesc);
}
}
// cached the typelib using the guid as the dictionary key
lock (_CachedTypeLibDesc) {
_CachedTypeLibDesc.Add(typeLibAttr.guid, typeLibDesc);
}
return(typeLibDesc);
}
internal static ComTypeLibDesc GetFromTypeLib(ComTypes.ITypeLib typeLib) {
// check whether we have already loaded this type library
ComTypes.TYPELIBATTR typeLibAttr = ComRuntimeHelpers.GetTypeAttrForTypeLib(typeLib);
ComTypeLibDesc typeLibDesc;
lock (_CachedTypeLibDesc) {
if (_CachedTypeLibDesc.TryGetValue(typeLibAttr.guid, out typeLibDesc)) {
return typeLibDesc;
}
}
typeLibDesc = new ComTypeLibDesc();
typeLibDesc._typeLibName = ComRuntimeHelpers.GetNameOfLib(typeLib);
int countTypes = typeLib.GetTypeInfoCount();
for (int i = 0; i < countTypes; i++) {
ComTypes.TYPEKIND typeKind;
typeLib.GetTypeInfoType(i, out typeKind);
ComTypes.ITypeInfo typeInfo;
if (typeKind == ComTypes.TYPEKIND.TKIND_COCLASS) {
typeLib.GetTypeInfo(i, out typeInfo);
ComTypeClassDesc classDesc = new ComTypeClassDesc(typeInfo);
typeLibDesc._classes.AddLast(classDesc);
} else if (typeKind == ComTypes.TYPEKIND.TKIND_ENUM) {
typeLib.GetTypeInfo(i, out typeInfo);
ComTypeEnumDesc enumDesc = new ComTypeEnumDesc(typeInfo);
typeLibDesc._enums.Add(enumDesc.TypeName, enumDesc);
}
}
// cached the typelib using the guid as the dictionary key
lock (_CachedTypeLibDesc) {
_CachedTypeLibDesc.Add(typeLibAttr.guid, typeLibDesc);
}
return typeLibDesc;
}