Method Execute

cpp/iedriver/Script.cpp:181–300

}

int Script::Execute() {
  LOG(TRACE) << "Entering Script::Execute";

  HRESULT hr = S_OK;
  CComVariant result = L"";
  CComBSTR error_description = L"";

  if (this->script_engine_host_ == NULL) {
    LOG(WARN) << "Script engine host is NULL";
    return ENOSUCHDOCUMENT;
  }

  CComBSTR design_mode = L"";
  this->script_engine_host_->get_designMode(&design_mode);
  design_mode.ToLower();
  if (design_mode == "on") {
    CComBSTR set_design_mode = "off";
    this->script_engine_host_->put_designMode(set_design_mode);
  }

  CComVariant temp_function;
  if (!this->CreateAnonymousFunction(&temp_function)) {
    LOG(WARN) << "Cannot create anonymous function";
    return EUNEXPECTEDJSERROR;
  }

  if (temp_function.vt != VT_DISPATCH) {
    LOG(DEBUG) << "No return value that we care about";
    return WD_SUCCESS;
  }

  CComPtr<IDispatchEx> function_dispatch;
  hr = temp_function.pdispVal->QueryInterface<IDispatchEx>(&function_dispatch);
  if (FAILED(hr)) {
    LOG(WARN) << "Anonymous function object does not implement IDispatchEx";
    return EUNEXPECTEDJSERROR;
  }

  // Grab the "call" method out of the returned function
  DISPID call_member_id;
  CComBSTR call_member_name = L"call";
  hr = function_dispatch->GetDispID(call_member_name, 0, &call_member_id);
  if (FAILED(hr)) {
    LOGHR(WARN, hr) << "Cannot locate call method on anonymous function";
    return EUNEXPECTEDJSERROR;
  }

  CComPtr<IHTMLWindow2> win;
  hr = this->script_engine_host_->get_parentWindow(&win);
  if (FAILED(hr)) {
    LOGHR(WARN, hr) << "Cannot get parent window, IHTMLDocument2::get_parentWindow failed";
    return EUNEXPECTEDJSERROR;
  }

  // IDispatch::Invoke() expects the arguments to be passed into it
  // in reverse order. To accomplish this, we create a new variant
  // array of size n + 1 where n is the number of arguments we have.
  // we copy each element of arguments_array_ into the new array in