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如何指定索引中每个新标题前的固定间隙

tag-icon • tag-icon indexing imakeidx makeindex vertical-spacing idxlayout
如何指定索引中每个新标题前的固定间隙

考虑一下代码

\documentclass{book}
\usepackage{imakeidx}
\let\cleardoublepage\clearpage
\makeindex
%\usepackage[font=small]{idxlayout}
\usepackage{idxlayout}
\usepackage{xcolor}

\begin{document}
\LARGE

Some words.\index{\textbf{HEADING1}! \textbf{\color{red}{Subheading}}! The entry immediately above HEADING2.}

Some words.\index{\textbf{HEADING2}! \textbf{\color{red}{Subheading}}! I would like to be able to globally specify the size of the gap between a new heading (such as HEADING2 and the last line of the entry immediately above it.}

\idxlayout{columns=1}
\printindex
\end{document}

生成索引

在此处输入图片描述

观察 HEADING2 之前的垂直空间有多小。

问题：如何增加 HEADING1 索引条目最后一行与 HEADING2 显示位置之间的间距？我希望能够为所有后续标题指定此间隙的值。

谢谢。

答案1

我在下面实现了其他一些可能对您的设置有用的功能 - 一种设置条目和的键值方法\index。heading这subheading消除了最终用户的格式规范，使您在使用标题/子标题时更加一致/统一。也就是说，您不必\textbf{<heading>}每次都指定标题。相反，

\myindex[heading={<heading>},subheading={<subheading>}]{<index entry>}

将检查您是否提供了heading/subheading并<index entry>相应地进行索引。

此外，\addvspace{<len>}每个都添加，heading以确保有足够的间隙<len> 多于（heading除了第一的标题应该位于指数标题；可以更改）。

在此处输入图片描述

\documentclass{article}

\usepackage{imakeidx}
\makeindex

\usepackage{idxlayout}
\usepackage{xcolor}

\usepackage{xkeyval}
\makeatletter
\DeclareDocumentCommand{\insertidxheadinggap}{}{%
  % Delayed execution of macro (https://tex.stackexchange.com/a/89187/5764)
  \def\insertidxheadinggap{\addvspace{\baselineskip}}}% Add \baselineskip above headings (excluding first)
\define@cmdkey{idx}{heading}[\relax]{}% Heading title
\define@cmdkey{idx}{subheading}[\relax]{}% Subheading title
\newcommand{\myindex}[2][]{%
  \setkeys{idx}{%
    heading,subheading,% Default settings
    #1}% User-provided settings
  % Construct \index{...} command based on heading/subheading supplied by user
  \begingroup\edef\x{\endgroup
    \noexpand\index{%
      \expandafter\ifx\cmdKV@idx@heading\relax\else
        \cmdKV@idx@heading @%
        \insertidxheadinggap%
        \noexpand\textbf{\cmdKV@idx@heading}!% Heading format: \textbf{<heading>}
      \fi
      \expandafter\ifx\cmdKV@idx@subheading\relax\else
        \noexpand\textbf{\noexpand\color{red}\cmdKV@idx@subheading}!% Subheading format: \textbf{\color{red}<subheading}
      \fi
      #2% Index entry
  }}\x
}
\makeatother

\begin{document}

Some words.%
\myindex[heading={Heading 1},subheading=Subheading]{The entry immediately above ``Heading 2.''}

Some words.%
\myindex[heading={Heading 2},subheading=Subheading]{I would like to be able to globally specify the size 
  of the gap between a new heading (such as ``Heading 2'' and the last line of the entry immediately above it).}

\myindex[heading={Heading 2},subheading={Another subheading}]{Something}
\myindex[heading={Heading 2}]{Somethine else}
\myindex[heading={Heading 2},subheading=Subheading]{Another entry}
\myindex[heading={Heading 321}]{Some other index entry}

\idxlayout{columns=1}
\printindex

\end{document}

上述方法假设您将拥有大量标题，而没有非标题条目，因为它们可能没有适当的间距调整。此外，可以扩展此方法以包含标题的“排序字符串”，这将允许您操纵标题在其他标题中的位置。

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