src/win32/tip/tip_class_factory.cc

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//
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#include "win32/tip/tip_class_factory.h"

#define _ATL_NO_AUTOMATIC_NAMESPACE
#define _WTL_NO_AUTOMATIC_NAMESPACE
#include <atlbase.h>
#include <atlcom.h>

#include "win32/tip/tip_dll_module.h"
#include "win32/tip/tip_text_service.h"

namespace mozc {
namespace win32 {
namespace tsf {

using ATL::CComPtr;

TipClassFactory::TipClassFactory() {}

HRESULT STDMETHODCALLTYPE TipClassFactory::QueryInterface(
  REFIID interface_id, void **object) {
  if (object == nullptr) {
    return E_INVALIDARG;
  }
  if (::IsEqualIID(interface_id, IID_IUnknown)) {
    *object = static_cast<IUnknown *>(this);
  } else if (::IsEqualIID(interface_id, IID_IClassFactory)) {
    *object = static_cast<IClassFactory *>(this);
  } else {
    *object = nullptr;
    return E_NOINTERFACE;
  }
  AddRef();
  return S_OK;
}

ULONG STDMETHODCALLTYPE TipClassFactory::AddRef() {
  return ref_count_.AddRefImpl();
}

ULONG STDMETHODCALLTYPE TipClassFactory::Release() {
  const ULONG count = ref_count_.ReleaseImpl();
  if (count == 0) {
    delete this;
  }
  return count;
}

HRESULT STDMETHODCALLTYPE TipClassFactory::CreateInstance(
    IUnknown *unknown, REFIID interface_id, void **object) {
  HRESULT result = S_OK;

  if (object == nullptr) {
    return E_INVALIDARG;
  }
  *object = nullptr;
  if (unknown != nullptr) {
    return CLASS_E_NOAGGREGATION;
  }

  // Create an TipTextService object and initialize it.
  CComPtr<TipTextService> text_service(TipTextServiceFactory::Create());

  // Retrieve the requested interface from the TipTextService object.
  // If this TipTextService object implements the given interface, the
  // TipTextService::QueryInterface() function increments its reference count
  // and copies its interface pointer to the |object|.
  // On the other hand, this object does not implement the given interface,
  // the TipTextService::Release() function deletes this object.
  return text_service->QueryInterface(interface_id, object);
}

HRESULT STDMETHODCALLTYPE TipClassFactory::LockServer(BOOL lock) {
  if (lock) {
    TipDllModule::AddRef();
  } else {
    TipDllModule::Release();
  }
  return S_OK;
}

}  // namespace tsf
}  // namespace win32
}  // namespace mozc