CPDFSDK_Annot* CPDFSDK_AnnotHandlerMgr::GetNextAnnot(CPDFSDK_Annot* pSDKAnnot,
                                                     FX_BOOL bNext) {
#ifdef PDF_ENABLE_XFA
  CPDFSDK_PageView* pPageView = pSDKAnnot->GetPageView();
  CPDFXFA_Page* pPage = pPageView->GetPDFXFAPage();
  if (!pPage)
    return nullptr;
  if (pPage->GetPDFPage()) {  // for pdf annots.
    CBA_AnnotIterator ai(pSDKAnnot->GetPageView(), pSDKAnnot->GetType(), "");
    CPDFSDK_Annot* pNext =
        bNext ? ai.GetNextAnnot(pSDKAnnot) : ai.GetPrevAnnot(pSDKAnnot);
    return pNext;
  }
  // for xfa annots
  std::unique_ptr<IXFA_WidgetIterator> pWidgetIterator(
      pPage->GetXFAPageView()->CreateWidgetIterator(
          XFA_TRAVERSEWAY_Tranvalse, XFA_WidgetStatus_Visible |
                                         XFA_WidgetStatus_Viewable |
                                         XFA_WidgetStatus_Focused));
  if (!pWidgetIterator)
    return nullptr;
  if (pWidgetIterator->GetCurrentWidget() != pSDKAnnot->GetXFAWidget())
    pWidgetIterator->SetCurrentWidget(pSDKAnnot->GetXFAWidget());
  CXFA_FFWidget* hNextFocus =
      bNext ? pWidgetIterator->MoveToNext() : pWidgetIterator->MoveToPrevious();
  if (!hNextFocus && pSDKAnnot)
    hNextFocus = pWidgetIterator->MoveToFirst();

  return pPageView->GetAnnotByXFAWidget(hNextFocus);
#else   // PDF_ENABLE_XFA
  CBA_AnnotIterator ai(pSDKAnnot->GetPageView(), "Widget", "");
  return bNext ? ai.GetNextAnnot(pSDKAnnot) : ai.GetPrevAnnot(pSDKAnnot);
#endif  // PDF_ENABLE_XFA
}
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CPDFSDK_Annot* CPDFSDK_AnnotHandlerMgr::GetNextAnnot(CPDFSDK_Annot* pSDKAnnot,
                                                     FX_BOOL bNext) {
#ifdef PDF_ENABLE_XFA
  CPDFSDK_PageView* pPageView = pSDKAnnot->GetPageView();
  CPDFXFA_Page* pPage = pPageView->GetPDFXFAPage();
  if (pPage == NULL)
    return NULL;
  if (pPage->GetPDFPage()) {  // for pdf annots.
    CBA_AnnotIterator ai(pSDKAnnot->GetPageView(), pSDKAnnot->GetType(), "");
    CPDFSDK_Annot* pNext =
        bNext ? ai.GetNextAnnot(pSDKAnnot) : ai.GetPrevAnnot(pSDKAnnot);
    return pNext;
  }
  // for xfa annots
  IXFA_WidgetIterator* pWidgetIterator =
      pPage->GetXFAPageView()->CreateWidgetIterator(
          XFA_TRAVERSEWAY_Tranvalse, XFA_WIDGETFILTER_Visible |
                                         XFA_WIDGETFILTER_Viewable |
                                         XFA_WIDGETFILTER_Field);
  if (pWidgetIterator == NULL)
    return NULL;
  if (pWidgetIterator->GetCurrentWidget() != pSDKAnnot->GetXFAWidget())
    pWidgetIterator->SetCurrentWidget(pSDKAnnot->GetXFAWidget());
  IXFA_Widget* hNextFocus = NULL;
  hNextFocus =
      bNext ? pWidgetIterator->MoveToNext() : pWidgetIterator->MoveToPrevious();
  if (hNextFocus == NULL && pSDKAnnot != NULL)
    hNextFocus = pWidgetIterator->MoveToFirst();

  pWidgetIterator->Release();
  return pPageView->GetAnnotByXFAWidget(hNextFocus);
#else   // PDF_ENABLE_XFA
  CBA_AnnotIterator ai(pSDKAnnot->GetPageView(), "Widget", "");
  return bNext ? ai.GetNextAnnot(pSDKAnnot) : ai.GetPrevAnnot(pSDKAnnot);
#endif  // PDF_ENABLE_XFA
}