imakeidx 列拆分

Question

imakeidx我需要仅当第一列到达页面底部后才开始创建索引的第二列。

\documentclass{book}
\usepackage{imakeidx}
\makeindex[columns=2]

\begin{document}
 foo\index{a}.  foo\index{b}.  foo\index{c}.  foo\index{d}.  foo\index{e}.  foo\index{f}.  foo\index{g}.  foo\index{h}.  foo\index{i}.  foo\index{j}.  foo\index{k}.  foo\index{l}.  foo\index{m}.  foo\index{ab}.  foo\index{ac}.  foo\index{asd}.  foo\index{asddf}.  foo\index{aasef}. 
\printindex
\end{document}

该图显示了我拥有的东西和我需要的东西：

Answer 1

你有两种选择：第一种是通过original选择

\documentclass[a5paper]{book}
\usepackage[pass]{geometry}

\usepackage[original]{imakeidx}
\makeindex

\begin{document}

foo\index{a}.  foo\index{b}.  foo\index{c}.  foo\index{d}.  foo\index{e}.  foo\index{f}.
foo\index{g}.  foo\index{h}.  foo\index{i}.  foo\index{j}.  foo\index{k}.  foo\index{l}.
foo\index{m}.  foo\index{ab}.  foo\index{ac}.  foo\index{asd}.  foo\index{asddf}.  foo\index{aasef}.

\printindex
\end{document}

只支持双栏格式，为了更清晰的展示结果，我用了A5纸：

第二种策略是通过multicols*而不是multicols：

\documentclass[a5paper]{book}
\usepackage[pass]{geometry}
\usepackage{imakeidx}
\makeindex[columns=2]

\xpatchcmd{\theindex}{multicols}{multicols*}{}{}
\xpatchcmd{\endtheindex}{multicols}{multicols*}{}{}

\begin{document}
foo\index{a}.  foo\index{b}.  foo\index{c}.  foo\index{d}.  foo\index{e}.  foo\index{f}.
foo\index{g}.  foo\index{h}.  foo\index{i}.  foo\index{j}.  foo\index{k}.  foo\index{l}.
foo\index{m}.  foo\index{ab}.  foo\index{ac}.  foo\index{asd}.  foo\index{asddf}.  foo\index{aasef}.

\printindex
\end{document}

这样做的好处是所有功能imakeidx均可用。