LaTeX. Пакет pdfx

Пакет для создание документов pdf, соответствующих стандартам PDF/A и PDF/X.

1 Проблемы

1.1 2021-07 Совместимость с LaTeX2e, версия от 2021-06-01

• После закрытия ошибки 605 (см. https://github.com/latex3/latex2e/issues/605) пакет pdfx перестал работать.
• В качестве временного решения предложено при компиляции откатиться на состояние до закрытия ошибки 605.
• Предложенный код (см. https://tex.stackexchange.com/questions/605854/error-using-pdfx-on-tex-live-2021):

  \ProvidesPackage{fixpdfx}[2021-07-22 A package that fixes pdfx errors on TeX Live 2021 in a quick and dirty way]
  
  % temporarily reverts https://github.com/latex3/latex2e/commit/5fb2860f2fedc87b213730f06ec1d77bcab4814a
  % resp. https://github.com/latex3/latex2e/commit/dd2ec509ec98e9c359a41e35aea6aade86485ca2
  % as it breaks pdfx (see https://tex.stackexchange.com/questions/605854/error-using-pdfx-on-tex-live-2021)
  
  \@ifpackageloaded{pdfx}{
      \PackageError{fixpdfx}{pdfx is loaded}{This package must be loaded before pdfx}
  }{}
  
  \ExplSyntaxOn
  
  % this is the old implementation from base/ltpara.dtx, version 1.0g
  \cs_new_protected:Npn \__old_para_end: {
    % ltpara v1.0h as well as firstaid/latex2e-first-aid-for-external-files.dtx v1.0o inserted
    % \scan_stop: here, which breaks pdfx
    \mode_if_horizontal:TF {
      \mode_if_inner:F {
           \tex_unskip:D
           \hook_use:n{para/end}
           \@kernel@after@para@end
           \mode_if_horizontal:TF {
             \if_int_compare:w 0 < \tex_lastnodetype:D
               \tex_kern:D \c_zero_dim
             \fi:
             \tex_par:D
             \hook_use:n{para/after}
             \@kernel@after@para@after
           }
           { \msg_error:nnnn { hooks }{ para-mode }{end}{horizontal} }
      }
    }
    \tex_par:D
  }
  
  \PackageWarning{fixpdfx}{Patching~\para_end:~implementation~to~fix~pdfx}
  \cs_set_eq:NN \par     \__old_para_end:
  % these two aren't actually required to fix pdfx, so we'll skip them...
  %\cs_set_eq:NN \@@par   \__old_para_end:
  %\cs_set_eq:NN \endgraf \__old_para_end:
  
  \AtBeginDocument{
      \@ifpackageloaded{pdfx}{}{
          \PackageError{fixpdfx}{pdfx~is~not~loaded}{You~did~not~load~pdfx~and~thus~do~not~need~this~package}
      }
      % pdfx v1.6.3 from 2019-02-27 is bad, so anything later is hopefully fixed...
      \@ifpackagelater{pdfx}{2019/02/28}{
          \PackageError{fixpdfx}{Please~check~whether~you~really~need~this~package.}{Your~pdfx~package~is~more~recent~than~2019-02-27~and~thus~might~not~require~this~package's~fix.}
      }{}
  
      \PackageWarning{fixpdf}{Restoring~old~\para_end:~implementation}
  
      % restore additional definitions
      \cs_set_eq:NN \par     \para_end:
      % see above: as we didn't replace them, no need to restore them.
      %\cs_set_eq:NN \@@par   \para_end:
      %\cs_set_eq:NN \endgraf \para_end:
  }
  
  \ExplSyntaxOff