与 expex 一起使用时 parcolumns 间距问题

Question

expex当我一起使用和时遇到两个问题parcolumns。

1. 无光泽的柱子上出现了很大的缝隙。
2. 注释上方出现间隙，导致两列/段落不再对齐。

为什么会出现这些问题？又该如何克服？

编辑＃1： 这个问题出现了类似的问题，但解决方案与我不太相关。

MWE（XeLaTeX）：

\documentclass{book}

\usepackage{parcolumns}

\usepackage{expex}
\usepackage{polyglossia}
\setdefaultlanguage{english}
\setotherlanguage{hebrew}
\newfontfamily\hebrewfont[Script=Hebrew]{FrankRuehl}
\newfontfamily\englishfont{Linux Libertine O}

\usepackage{lipsum}

\usepackage{changepage}
\strictpagecheck

\makeatletter
\def\pc@placeboxes{%
  \global\let\@tempa\relax%
  \hb@xt@\linewidth{%
    \vfuzz30ex %
    \vbadness\@M%
    \splittopskip\z@skip%
    \checkoddpage\ifoddpage
      \count@\z@%
      \loop\ifnum\count@<\pc@columncount%
        \advance\count@\@ne%
        \my@placeboxes@body%
      \repeat%
    \else
      \count@\pc@columncount%
      \loop\ifnum\count@>\z@%
        \my@placeboxes@body%
        \advance\count@\m@ne%
      \repeat%
    \fi
  }%
  \@tempa%
}

\def\my@placeboxes@body{%
  \expandafter\ifvoid\csname pc@column@\number\count@\endcsname%
    \hskip\csname pc@column@width@\number\count@\endcsname%
  \else%
    \expandafter\setbox\expandafter\@tempboxa%
      \expandafter\vsplit\csname pc@column@\number\count@\endcsname%
        to \dp\strutbox%
    \vbox{\unvbox\@tempboxa}%
  \fi%
  \expandafter\ifvoid\csname pc@column@\number\count@\endcsname%
  \else%
    \global\let\@tempa\pc@placeboxes%
  \fi%
  \ifnum\count@>\z@%
    \strut%
    \hfill%
    \ifpc@rulebetween%
      \vrule%
      \hfill%
    \fi%
  \fi%
}
\makeatother

\begin{document}

\begin{parcolumns}[%
  sloppy        = true,
  sloppyspaces  = true,
  nofirstindent = true,
  colwidths     = {1=0.67\textwidth, 2=0.29\textwidth}
]{2}

\colchunk[1]{\exdisplay\begingl

\gla Far far away behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. //

  \glb Far far away behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. //

  \glc Far far away behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. //

\endgl\xe
}

\colchunk[2]{\small%
  \lipsum[2]
}
\end{parcolumns}

\end{document}

输出：

编辑#2：更简单的MWE（XeLaTeX）：

\documentclass{book}

\usepackage{parcolumns}
\usepackage{expex}
\usepackage{lipsum}

\begin{document}

\begin{parcolumns}[%
  sloppy        = true,
  sloppyspaces  = true,
  nofirstindent = true,
  colwidths     = {1=0.67\textwidth, 2=0.29\textwidth}
]{2}

\colchunk[1]{\exdisplay\begingl

\gla Far far away behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. //

  \glb Far far away behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. //

  \glc Far far away behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. //

\endgl\xe
}

\colchunk[2]{\small%
  \lipsum[2]
}
\end{parcolumns}

\end{document}

Answer 1

\begingl和之间的物品\endgl被放入一个箱子中。因此，parcolumns和parallel无法正常完成工作，因为他们只看到一条很长的线。

以下破解方法拆开了外包装盒。但内部零件仍装在盒子里。

\documentclass{book}

\usepackage{parcolumns}
\usepackage{expex}
\usepackage{lipsum}

\newsavebox\expexBox
\newenvironment{unvtop}{%
  \let\orgvtop\vtop
  \protected\def\vtop{%
    \let\vtop=\orgvtop
    \global\setbox\expexBox=\vtop
  }%
  \ignorespaces
}{%
  \unvbox\expexBox
  \ignorespacesafterend
}

\begin{document}

\begin{parcolumns}[%
  sloppy        = true,
  sloppyspaces  = true,
  nofirstindent = true,
  colwidths     = {1=0.67\textwidth, 2=0.29\textwidth}
]{2}

\colchunk[1]{%
  \begin{unvtop}
    \exdisplay\begingl

    \gla A Far far away behind the word mountains, far from the countries
      Vokalia and Consonantia, there live the blind texts.  //

    \glb B Far far away behind the word mountains, far from the countries
      Vokalia and Consonantia, there live the blind texts.  //

    \glc C Far far away behind the word mountains, far from the countries
      Vokalia and Consonantia, there live the blind texts.  //

  \endgl\xe
  \end{unvtop}
}

\colchunk[2]{\small%
  \lipsum[2]
}
\end{parcolumns}

\end{document}