multicol：僅在最少行數後才平衡列？

Question

multicol.sty我在頁面的一小部分上使用平衡列。一般來說，我希望這些列保持平衡，但如果生成的兩列部分的高度小於 3 行，則不需要平衡。我怎樣才能做到這一點？ （透過自動化？）

微量元素：

\documentclass{scrartcl}
\usepackage{multicol}
\parindent 0pt

\begin{document}

Some onecolumn text goes here on top of the page \ldots 

\begin{multicols}{2}
    This text is balanced into two columns, although it is very
    short. How can I prevent balancing below 3 lines minimum
    height?
\end{multicols}%

Some more onecolumn text goes here below the twocol part \ldots 

\end{document} 

因此，在這個範例中，我希望所有的twocol 文字只會出現在左列。

Answer 1

目前只有透過更改程式碼才能實現完全自動化。一次性操作很簡單：在環境之前將計數器設定unbalance為 2 \baselineskip。

每次環境結束後計數器都會重設為零。

自動執行此操作的更通用的解決方案可能如下所示：

\documentclass{scrartcl}
\usepackage[balancingshow]{multicol}
\parindent 0pt

%-------------------------------------------------------------------------------
\usepackage{regexpatch}

\newcounter{multicolminlines}
\setcounter{multicolminlines}{1}

\makeatletter
\xpatchcmd\balance@columns
   {\ifnum\dimen@<\topskip
     \mult@info\@ne
       {Start value
          \the\dimen@  \space ->
          \the\topskip \space (corrected)}%
     \dimen@\topskip
   \fi}
   {\skip@\c@multicolminlines\baselineskip
   \advance\skip@-\baselineskip
   \advance\skip@\topskip
   \ifnum\dimen@<\skip@
     \mult@info\@ne
       {Start value
          \the\dimen@  \space ->
          \the\skip@ \space (corrected)}%
     \dimen@\skip@
   \fi
   }
   {\typeout{Success!}}{\patchFAILED}
\makeatother
%-------------------------------------------------------------------------------

\begin{document}

Some onecolumn text goes here on top of the page \ldots 

\setcounter{multicolminlines}{3}
\begin{multicols}{2}
    This text is balanced into two columns, although it is very
    short. How can I prevent balancing below 3 lines minimum
    height?
\end{multicols}

Some more onecolumn text goes here below the twocol part \ldots 


\setcounter{multicolminlines}{2}
\begin{multicols}{2}
    This text is balanced into two columns, although it is very
    short. How can I prevent balancing below 3 lines minimum
    height?
\end{multicols}


\begin{multicols}{2}
    This text is balanced into two columns, although it is very
    short. 
\end{multicols}

\setcounter{multicolminlines}{1}
\begin{multicols}{2}
    This text is balanced into two columns, although it is very
    short. 
\end{multicols}

\end{document} 

如果我們應用這個補丁，那麼我們會得到以下輸出（請注意，我更改了各種環境的最小行數）：