343 lines
9.4 KiB
C++
343 lines
9.4 KiB
C++
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Microsoft Windows
|
||
|
|
// Copyright (C) Microsoft Corporation, 1993 - 1999.
|
||
|
|
//
|
||
|
|
// File: CIDispatchHelper.cpp
|
||
|
|
//
|
||
|
|
// Contents: implementation of CIDispatchHelper class
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#include "priv.h"
|
||
|
|
#include "CIDispatchHelper.h"
|
||
|
|
|
||
|
|
#define TF_IDISPATCH 0
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// helper function for pulling ITypeInfo out of the specified typelib
|
||
|
|
//
|
||
|
|
HRESULT CIDispatchHelper::_LoadTypeInfo(const GUID* rguidTypeLib, LCID lcid, UUID uuid, ITypeInfo** ppITypeInfo)
|
||
|
|
{
|
||
|
|
HRESULT hr;
|
||
|
|
ITypeLib* pITypeLib;
|
||
|
|
|
||
|
|
*ppITypeInfo = NULL;
|
||
|
|
|
||
|
|
//
|
||
|
|
// The type libraries are registered under 0 (neutral),
|
||
|
|
// 7 (German), and 9 (English) with no specific sub-
|
||
|
|
// language, which would make them 407 or 409 and such.
|
||
|
|
// If you are sensitive to sub-languages, then use the
|
||
|
|
// full LCID instead of just the LANGID as done here.
|
||
|
|
//
|
||
|
|
hr = LoadRegTypeLib(*rguidTypeLib, 1, 0, PRIMARYLANGID(lcid), &pITypeLib);
|
||
|
|
|
||
|
|
//
|
||
|
|
// If LoadRegTypeLib fails, try loading directly with
|
||
|
|
// LoadTypeLib, which will register the library for us.
|
||
|
|
// Note that there's no default case here because the
|
||
|
|
// prior switch will have filtered lcid already.
|
||
|
|
//
|
||
|
|
// NOTE: You should prepend your DIR registry key to the
|
||
|
|
// .TLB name so you don't depend on it being it the PATH.
|
||
|
|
// This sample will be updated later to reflect this.
|
||
|
|
//
|
||
|
|
if (FAILED(hr))
|
||
|
|
{
|
||
|
|
OLECHAR wszPath[MAX_PATH];
|
||
|
|
#ifdef UNICODE
|
||
|
|
GetModuleFileName(HINST_THISDLL, wszPath, ARRAYSIZE(wszPath));
|
||
|
|
#else
|
||
|
|
TCHAR szPath[MAX_PATH];
|
||
|
|
GetModuleFileName(HINST_THISDLL, szPath, ARRAYSIZE(szPath));
|
||
|
|
MultiByteToWideChar(CP_ACP, 0, szPath, -1, wszPath, ARRAYSIZE(wszPath));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
switch (PRIMARYLANGID(lcid))
|
||
|
|
{
|
||
|
|
case LANG_NEUTRAL:
|
||
|
|
case LANG_ENGLISH:
|
||
|
|
hr = LoadTypeLib(wszPath, &pITypeLib);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
// got the type lib, get type info for the interface we want
|
||
|
|
hr = pITypeLib->GetTypeInfoOfGuid(uuid, ppITypeInfo);
|
||
|
|
pITypeLib->Release();
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// IDispatch Interface
|
||
|
|
//
|
||
|
|
|
||
|
|
//
|
||
|
|
// CIDispatchHelper::GetTypeInfoCount
|
||
|
|
//
|
||
|
|
// Purpose:
|
||
|
|
// Returns the number of type information (ITypeInfo) interfaces
|
||
|
|
// that the object provides (0 or 1).
|
||
|
|
//
|
||
|
|
// Parameters:
|
||
|
|
// pctInfo UINT * to the location to receive
|
||
|
|
// the count of interfaces.
|
||
|
|
//
|
||
|
|
// Return Value:
|
||
|
|
// HRESULT NOERROR or a general error code.
|
||
|
|
//
|
||
|
|
STDMETHODIMP CIDispatchHelper::GetTypeInfoCount(UINT *pctInfo)
|
||
|
|
{
|
||
|
|
// we implement GetTypeInfo so return 1
|
||
|
|
*pctInfo = 1;
|
||
|
|
|
||
|
|
return NOERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// CIDispatchHelper::GetTypeInfo
|
||
|
|
//
|
||
|
|
// Purpose:
|
||
|
|
// Retrieves type information for the automation interface. This
|
||
|
|
// is used anywhere that the right ITypeInfo interface is needed
|
||
|
|
// for whatever LCID is applicable. Specifically, this is used
|
||
|
|
// from within GetIDsOfNames and Invoke.
|
||
|
|
//
|
||
|
|
// Parameters:
|
||
|
|
// itInfo UINT reserved. Must be zero.
|
||
|
|
// lcid LCID providing the locale for the type
|
||
|
|
// information. If the object does not support
|
||
|
|
// localization, this is ignored.
|
||
|
|
// ppITypeInfo ITypeInfo ** in which to store the ITypeInfo
|
||
|
|
// interface for the object.
|
||
|
|
//
|
||
|
|
// Return Value:
|
||
|
|
// HRESULT NOERROR or a general error code.
|
||
|
|
//
|
||
|
|
STDMETHODIMP CIDispatchHelper::GetTypeInfo(UINT itInfo, LCID lcid, ITypeInfo** ppITypeInfo)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
ITypeInfo** ppITI;
|
||
|
|
|
||
|
|
*ppITypeInfo = NULL;
|
||
|
|
|
||
|
|
if (itInfo != 0)
|
||
|
|
{
|
||
|
|
return TYPE_E_ELEMENTNOTFOUND;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if 1
|
||
|
|
// docs say we can ignore lcid if we support only one LCID
|
||
|
|
// we don't have to return DISP_E_UNKNOWNLCID if we're *ignoring* it
|
||
|
|
ppITI = &_pITINeutral;
|
||
|
|
#else
|
||
|
|
//
|
||
|
|
// Since we returned one from GetTypeInfoCount, this function
|
||
|
|
// can be called for a specific locale. We support English
|
||
|
|
// and neutral (defaults to English) locales. Anything
|
||
|
|
// else is an error.
|
||
|
|
//
|
||
|
|
// After this switch statement, ppITI will point to the proper
|
||
|
|
// member pITypeInfo. If *ppITI is NULL, we know we need to
|
||
|
|
// load type information, retrieve the ITypeInfo we want, and
|
||
|
|
// then store it in *ppITI.
|
||
|
|
//
|
||
|
|
switch (PRIMARYLANGID(lcid))
|
||
|
|
{
|
||
|
|
case LANG_NEUTRAL:
|
||
|
|
case LANG_ENGLISH:
|
||
|
|
ppITI=&_pITINeutral;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
hr = DISP_E_UNKNOWNLCID;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
//Load a type lib if we don't have the information already
|
||
|
|
if (*ppITI == NULL)
|
||
|
|
{
|
||
|
|
ITypeInfo* pITIDisp;
|
||
|
|
|
||
|
|
hr = _LoadTypeInfo(_piidTypeLib, lcid, *_piid, &pITIDisp);
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
HREFTYPE hrefType;
|
||
|
|
|
||
|
|
// All our IDispatch implementations are DUAL. GetTypeInfoOfGuid
|
||
|
|
// returns the ITypeInfo of the IDispatch-part only. We need to
|
||
|
|
// find the ITypeInfo for the dual interface-part.
|
||
|
|
if (SUCCEEDED(pITIDisp->GetRefTypeOfImplType(0xffffffff, &hrefType)) &&
|
||
|
|
SUCCEEDED(pITIDisp->GetRefTypeInfo(hrefType, ppITI)))
|
||
|
|
{
|
||
|
|
// GetRefTypeInfo should have filled in ppITI with the dual interface
|
||
|
|
(*ppITI)->AddRef(); // add the ref for our caller
|
||
|
|
*ppITypeInfo = *ppITI;
|
||
|
|
|
||
|
|
pITIDisp->Release();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// I suspect GetRefTypeOfImplType may fail if someone uses
|
||
|
|
// CIDispatchHelper on a non-dual interface. In this case the
|
||
|
|
// ITypeInfo we got above is just fine to use.
|
||
|
|
*ppITI = pITIDisp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// we already loaded the type library and we have an ITypeInfo from it
|
||
|
|
(*ppITI)->AddRef(); // add the ref for our caller
|
||
|
|
*ppITypeInfo = *ppITI;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// CIDispatchHelper::GetIDsOfNames
|
||
|
|
//
|
||
|
|
// Purpose:
|
||
|
|
// Converts text names into DISPIDs to pass to Invoke
|
||
|
|
//
|
||
|
|
// Parameters:
|
||
|
|
// riid REFIID reserved. Must be IID_NULL.
|
||
|
|
// rgszNames OLECHAR ** pointing to the array of names to be
|
||
|
|
// mapped.
|
||
|
|
// cNames UINT number of names to be mapped.
|
||
|
|
// lcid LCID of the locale.
|
||
|
|
// rgDispID DISPID * caller allocated array containing IDs
|
||
|
|
// corresponging to those names in rgszNames.
|
||
|
|
//
|
||
|
|
// Return Value:
|
||
|
|
// HRESULT NOERROR or a general error code.
|
||
|
|
//
|
||
|
|
STDMETHODIMP CIDispatchHelper::GetIDsOfNames(REFIID riid, OLECHAR** rgszNames, UINT cNames, LCID lcid, DISPID* rgDispID)
|
||
|
|
{
|
||
|
|
HRESULT hr;
|
||
|
|
ITypeInfo* pTI;
|
||
|
|
|
||
|
|
if (riid != IID_NULL)
|
||
|
|
{
|
||
|
|
return DISP_E_UNKNOWNINTERFACE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// get the right ITypeInfo for lcid.
|
||
|
|
hr = GetTypeInfo(0, lcid, &pTI);
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
hr = pTI->GetIDsOfNames(rgszNames, cNames, rgDispID);
|
||
|
|
pTI->Release();
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// CIDispatchHelper::Invoke
|
||
|
|
//
|
||
|
|
// Purpose:
|
||
|
|
// Calls a method in the dispatch interface or manipulates a
|
||
|
|
// property.
|
||
|
|
//
|
||
|
|
// Parameters:
|
||
|
|
// dispID DISPID of the method or property of interest.
|
||
|
|
// riid REFIID reserved, must be IID_NULL.
|
||
|
|
// lcid LCID of the locale.
|
||
|
|
// wFlags USHORT describing the context of the invocation.
|
||
|
|
// pDispParams DISPPARAMS * to the array of arguments.
|
||
|
|
// pVarResult VARIANT * in which to store the result. Is
|
||
|
|
// NULL if the caller is not interested.
|
||
|
|
// pExcepInfo EXCEPINFO * to exception information.
|
||
|
|
// puArgErr UINT * in which to store the index of an
|
||
|
|
// invalid parameter if DISP_E_TYPEMISMATCH
|
||
|
|
// is returned.
|
||
|
|
//
|
||
|
|
// Return Value:
|
||
|
|
// HRESULT NOERROR or a general error code.
|
||
|
|
//
|
||
|
|
STDMETHODIMP CIDispatchHelper::Invoke(DISPID dispID, REFIID riid, LCID lcid, unsigned short wFlags, DISPPARAMS* pDispParams, VARIANT* pVarResult, EXCEPINFO* pExcepInfo, UINT* puArgErr)
|
||
|
|
{
|
||
|
|
HRESULT hr;
|
||
|
|
ITypeInfo *pTI;
|
||
|
|
|
||
|
|
//riid is supposed to be IID_NULL always
|
||
|
|
if (riid != IID_NULL)
|
||
|
|
{
|
||
|
|
return(DISP_E_UNKNOWNINTERFACE);
|
||
|
|
}
|
||
|
|
|
||
|
|
// make sure we have an interface to hand off to Invoke
|
||
|
|
if (_pdisp == NULL)
|
||
|
|
{
|
||
|
|
hr = QueryInterface(*_piid, (LPVOID*)&_pdisp);
|
||
|
|
|
||
|
|
if (FAILED(hr))
|
||
|
|
{
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
// don't hold a refcount on ourself
|
||
|
|
_pdisp->Release();
|
||
|
|
}
|
||
|
|
|
||
|
|
// get the ITypeInfo for lcid
|
||
|
|
hr = GetTypeInfo(0, lcid, &pTI);
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
// clear exceptions
|
||
|
|
SetErrorInfo(0L, NULL);
|
||
|
|
|
||
|
|
// this is exactly what DispInvoke does--so skip the overhead.
|
||
|
|
hr = pTI->Invoke(_pdisp, dispID, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
|
||
|
|
pTI->Release();
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
CIDispatchHelper::CIDispatchHelper(const IID* piid, const IID* piidTypeLib)
|
||
|
|
{
|
||
|
|
// the constructor takes a guid that this IDispatch implementation is for
|
||
|
|
_piid = piid;
|
||
|
|
|
||
|
|
// and a guid that tells us which RegTypeLib to load
|
||
|
|
_piidTypeLib = piidTypeLib;
|
||
|
|
|
||
|
|
ASSERT(_pITINeutral == NULL);
|
||
|
|
ASSERT(_pdisp == NULL);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
CIDispatchHelper::~CIDispatchHelper(void)
|
||
|
|
{
|
||
|
|
if (_pITINeutral)
|
||
|
|
{
|
||
|
|
_pITINeutral->Release();
|
||
|
|
_pITINeutral = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|