Method OnExport

src/LabelDialog.cpp:669–744

}

void LabelDialog::OnExport(wxCommandEvent & WXUNUSED(event))
{
   int cnt = mData.size();

   // Silly user (could just disable the button, but that's a hassle ;-))
   if (cnt == 0) {
      AudacityMessageBox( XO("No labels to export.") );
      return;
   }

   // Extract the actual name.
   wxString fName = mTrackNames[mTrackNames.size() - 1].AfterFirst(wxT('-')).Mid(1);

   fName = SelectFile(FileNames::Operation::Export,
      XO("Export Labels As:"),
      wxEmptyString,
      fName,
      wxT("txt"),
      { FileNames::TextFiles, LabelTrack::SubripFiles, LabelTrack::WebVTTFiles },
      wxFD_SAVE | wxFD_OVERWRITE_PROMPT | wxRESIZE_BORDER,
      this);

   if (fName.empty())
      return;

   LabelFormat format = LabelTrack::FormatForFileName(fName);

   // Move existing files out of the way.  Otherwise wxTextFile will
   // append to (rather than replace) the current file.

   if (wxFileExists(fName)) {
#ifdef __WXGTK__
      wxString safetyFileName = fName + wxT("~");
#else
      wxString safetyFileName = fName + wxT(".bak");
#endif

      if (wxFileExists(safetyFileName))
         wxRemoveFile(safetyFileName);

      wxRename(fName, safetyFileName);
   }

   wxTextFile f(fName);
#ifdef __WXMAC__
   wxFile{}.Create(fName);
#else
   f.Create();
#endif
   f.Open();
   if (!f.IsOpened()) {
      AudacityMessageBox(
         XO("Couldn't write to file: %s").Format( fName ) );
      return;
   }

   // Transfer our collection to a temporary label track
   auto lt = std::make_shared<LabelTrack>();