C++ IECommandExecutor::GetManagedElement方法代码示例

int IECommandHandler::GetElement(const IECommandExecutor& executor,
                                 const std::string& element_id,
                                 ElementHandle* element_wrapper) {
  int status_code = EOBSOLETEELEMENT;
  ElementHandle candidate_wrapper;
  int result = executor.GetManagedElement(element_id, &candidate_wrapper);
  if (result != SUCCESS) {
    status_code = 404;
  } else {
    // Verify that the element is still valid by walking up the
    // DOM tree until we find no parent or the html tag
    CComPtr<IHTMLElement> parent(candidate_wrapper->element());
    while (parent) {
      CComQIPtr<IHTMLHtmlElement> html(parent);
      if (html) {
        status_code = SUCCESS;
        *element_wrapper = candidate_wrapper;
        break;
      }

      CComPtr<IHTMLElement> next;
      HRESULT hr = parent->get_parentElement(&next);
      if (FAILED(hr)) {
        //std::cout << hr << " [" << (_bstr_t(_com_error((DWORD) hr).ErrorMessage())) << "]";
      }

      if (next == NULL) {
        BSTR tag;
        parent->get_tagName(&tag);
        //std::cout << "Found null parent of element with tag " << _bstr_t(tag);
      }
      parent = next;
    }

    if (status_code != SUCCESS) {
      IECommandExecutor& mutable_executor = const_cast<IECommandExecutor&>(executor);
      mutable_executor.RemoveManagedElement(element_id);
    } else {
      // If the element is attached to the DOM, validate that its document
      // is the currently-focused document (via frames).
      BrowserHandle current_browser;
      executor.GetCurrentBrowser(&current_browser);
      CComPtr<IHTMLDocument2> focused_doc;
      current_browser->GetDocument(&focused_doc);

      CComPtr<IDispatch> parent_doc_dispatch;
      parent->get_document(&parent_doc_dispatch);

      if (!focused_doc.IsEqualObject(parent_doc_dispatch)) {
        status_code = EOBSOLETEELEMENT;
      }
    }
  }

  return status_code;
}

int IECommandHandler::GetElement(const IECommandExecutor& executor,
                                 const std::string& element_id,
                                 ElementHandle* element_wrapper) {
  LOG(TRACE) << "Entering IECommandHandler::GetElement";

  ElementHandle candidate_wrapper;
  int result = executor.GetManagedElement(element_id, &candidate_wrapper);
  if (result != SUCCESS) {
    // This bears some explanation. Technically, passing an invalid ID in the
    // URL for an element command should result in a 404. However, since the
    // language bindings don't make up their own element IDs, any call from
    // a language binding is more than likely an ID that the IE driver assigned
    // it, and it was at one time valid. Therefore, we'll assume that not finding
    // the element ID in the cache means it's stale.
    LOG(WARN) << "Unable to get managed element, element not found, assuming stale";
    return EOBSOLETEELEMENT;
  } else {
    if (!candidate_wrapper->IsAttachedToDom()) {
      LOG(WARN) << "Found managed element is no longer valid";
      IECommandExecutor& mutable_executor = const_cast<IECommandExecutor&>(executor);
      mutable_executor.RemoveManagedElement(element_id);
      return EOBSOLETEELEMENT;
    } else {
      // If the element is attached to the DOM, validate that its document
      // is the currently-focused document (via frames).
      BrowserHandle current_browser;
      executor.GetCurrentBrowser(&current_browser);
      CComPtr<IHTMLDocument2> focused_doc;
      current_browser->GetDocument(&focused_doc);

      CComPtr<IDispatch> parent_doc_dispatch;
      candidate_wrapper->element()->get_document(&parent_doc_dispatch);

      if (focused_doc.IsEqualObject(parent_doc_dispatch)) {
        *element_wrapper = candidate_wrapper;
        return SUCCESS;
      } else {
        LOG(WARN) << "Found managed element's document is not currently focused";
      }
    }
  }

  return EOBSOLETEELEMENT;
}