显示本地目录时自动调整当前部分的颜色

Question

我建议采用以下方法，这是一种更轻松的方法，但不可否认的是，有点不合时宜。

这埃托克 tag的用途是决定打印目录中的哪些部分。如果我们按照这种方式操作，我们就会像 OP 的代码一样，在每个新内容中添加标签包但是，我们还必须找到方法将所有进一步的数据包的级别设置为不可见，这在包含几个这样的数据包的文档中可能是可以的，但无论如何有些麻烦。

尽管如此，更新还是会使用标签，但不能用于颜色管理。正如评论中指出的那样，标签仅用于以动态可定制的方式从文件内部本地影响.toc计数器tocdepth。要让它们影响颜色之类的东西，就意味着要破解内部etoc宏。

更简单的方法是用某种方式来告诉etoc现在停止当前目录。似乎还没有实现这样的功能，因此我不得不这样做（通过\cfr@removetonil、\AtEndDocument钩子和中的代码\maintoc）。

颜色的管理更简单，我们只需要在文件中存储.toc一些数字，并将其值与文档中要显示彩色目录的位置的当前值进行比较。

标准类样式对于坚持重置页码颜色的部分感到烦恼，我通过局部重新定义来解决这个问题，但这\normalcolor有点残酷。

\documentclass[oneside,openany]{book}% made oneside/openany just to reduce pages in test file - actual use case is double-sided
\usepackage{etoc,xparse,xcolor}

\makeatletter

\newcounter{packetcount}

\setcounter{packetcount}{1}

\NewDocumentCommand\packetpart {}{%
  \clearpage
  \thispagestyle{empty}%
  \stepcounter{packetcount}%
  Title page goes here
  \clearpage\thispagestyle{empty}\cleardoublepage
  \addtocontents {toc}{\protect\cfr@toccolormanager {\arabic{packetcount}}}%
    \tableofcontents
  \clearpage\thispagestyle{empty}\cleardoublepage 
}

\def\cfr@nil {}
\long\def\cfr@removetonil #1\cfr@nil {}

\newcommand*\cfrtoccolormanager [1]{%
   \ifnum #1<\value{packetcount}\color{fadedtoc}%
   \else\ifnum #1=\value{packetcount}\color{ontoc}\else
   \expandafter\expandafter\expandafter\cfr@removetonil\fi\fi }

\AtBeginDocument {\addtocontents{toc}{\protect\cfr@toccolormanager {1}}}

\AtEndDocument   {\addtocontents{toc}{\protect\cfr@nil }}

\newcommand*\maintoc {\let\cfr@toccolormanager\@gobble
                      \tableofcontents
                      \let\cfr@toccolormanager\cfrtoccolormanager 
% this awful thing next is because of disputable habit of the standard 
% classes to reset the color when printing the page numbers (and
% only the page numbers!) in the toc, for the sections, but not
% the chapters... this is less drastic than redefining \addcontentsline
% which would have then to be made compatible with hyperref!
%
% full usage of etoc would go with a customization of the toc line
% styles, hence the problem would not even exist.
      \renewcommand*\etocaftertitlehook{\let\normalcolor\relax}%
}
\makeatother

\colorlet{toccol}{black}
\colorlet{fadedtoc}{yellow}% just for clarity in the example
\colorlet{ontoc}{blue}% just for clarity in the example

\begin{document}

  Main title page goes here.

  \maintoc

  \chapter{Chapter One}
  \section{A section}
  \section{Another section}

  \packetpart
  \chapter{Chapter Two}
  \section{A middle section}
  \section{Another middle section}

  \packetpart
  \chapter{Chapter Three}
  \section{A later section}

\end{document}

抱歉，这些透明图像上出现了黄色：

这是使用 etoc 所谓标签的方法。颜色管理如上所述。代码更简单，我们不需要定义分隔宏，也不必在文件末尾放置一些标记.toc。我将解决页码颜色问题的方法留给用户自己决定：我认为tocloft可以完全控制，当然etoc也可以，但必须定义线条样式。在这里，一切都按照类默认值进行。

为了简单起见，这件事并不是完全自动化的：请参阅定义以\maintoc了解需要manual做的事情。

注意：在下面的一条评论中，我给出了关于的错误指示\etocsettagdepth。正确的做法是在此处将其第二个参数设置为all(或至少section) 而不是chapter。请参阅代码。

\documentclass[oneside,openany]{book}% made oneside/openany just to reduce pages in test file - actual use case is double-sided
\usepackage{etoc,xparse,xcolor}

\makeatletter

\newcounter{packetcount}

\setcounter{packetcount}{1}

\NewDocumentCommand\packetpart {}{%
  \clearpage
  \thispagestyle{empty}%
  \stepcounter{packetcount}%
  Title page goes here
  \clearpage\thispagestyle{empty}\cleardoublepage
  \etocdepthtag.toc {packet\arabic{packetcount}}%
% next is to show all sections, subsections... of the next chapter,
%  up to the level restrained by the global tocdepth setting:
  \etocsettagdepth {packet\arabic{packetcount}}{all}%
  \addtocontents {toc}{\protect\cfr@toccolormanager {\arabic{packetcount}}}%
    \tableofcontents
  \clearpage\thispagestyle{empty}\cleardoublepage 
}

\newcommand*\cfrtoccolormanager [1]{%
   \ifnum #1<\value{packetcount}\color{fadedtoc}%
   \else\ifnum #1=\value{packetcount}\color{ontoc}\fi\fi }

\AtBeginDocument {\addtocontents{toc}{\protect\cfr@toccolormanager {1}}}

\newcommand*\maintoc {\let\cfr@toccolormanager\@gobble
                      \tableofcontents
                      \let\cfr@toccolormanager\cfrtoccolormanager 
    \etocsettagdepth {packet2}{none}%
    \etocsettagdepth {packet3}{none}%
    \etocsettagdepth {packet4}{none}%
% repeat with until the last packet
}
\makeatother

\colorlet{toccol}{black}
\colorlet{fadedtoc}{green}% just for (more) clarity in the example. yellow=yuck!
\colorlet{ontoc}{blue}% just for clarity in the example

\begin{document}

  Main title page goes here.

  \maintoc

  \chapter{Chapter One}
  \section{A section}
  \section{Another section}

  \packetpart
  \chapter{Chapter Two}
  \section{A middle section}
  \section{Another middle section}

  \packetpart
  \chapter{Chapter Three}
  \section{A later section}
  \section{Another later section}

  \packetpart
  \chapter{Chapter Four}
  \section{An almost latest section}
  \section{A latest section}

\end{document}

Answer 1