Method ValidateAndFixExt

src/export/ExportFilePanel.cpp:364–407

}

void ExportFilePanel::ValidateAndFixExt()
{
   if(mSelectedPlugin == nullptr)
      return;

   const auto formatInfo = mSelectedPlugin->GetFormatInfo(mSelectedFormatIndex);
   if(formatInfo.extensions.empty())
      return;

   wxFileName filename;
   filename.SetFullName(mFullName->GetValue());
   const auto desiredExt = filename.GetExt().Trim();

   //See https://github.com/audacity/audacity/issues/5823
   //check if extension is valid, i.e. does not contain whitespace characters.
   //Otherwise everything after '.'(if present) is considered to be a part of name.
   if(wxRegEx{R"(^[^ ]+$)"}.Matches(desiredExt))
   {
      auto it = std::find_if(
         formatInfo.extensions.begin(),
         formatInfo.extensions.end(),
         // if typed extension uses different case (e.g. MP3 instead of mp3)
         // we'll reset the file extension to one provided by FormatInfo
         [&](const auto& ext) { return desiredExt.IsSameAs(ext, false); });

      if(it == formatInfo.extensions.end())
         it = formatInfo.extensions.begin();

      if(!it->empty() && !it->IsSameAs(filename.GetExt()))
      {
         filename.SetExt(*it);
         mFullName->SetValue(filename.GetFullName());
      }
   }
   else if(!formatInfo.extensions.front().empty())
   {
      auto fullname = filename.GetFullName();
      if(!fullname.EndsWith("."))
         fullname.Append(".");
      fullname.Append(formatInfo.extensions.front());
      filename.SetFullName(fullname);
      mFullName->SetValue(filename.GetFullName());
   }
}

void ExportFilePanel::OnFullNameFocusKill(wxFocusEvent& event)
{