用特定属性标记线

Question

是否有可能以某种方式用以下属性来突出显示/标记线条？

1. 这是段落的最后一行
2. 和：
   • 任何一个它结束于文本宽度右端的 1em 范围内；
   • 或者少于 7 个字符。

超满警告将在草稿模式下标记超满的行。我正在寻找类似的东西，能够自动标记不符合某些印刷指南的行。然后例如，可以根据以下规则更正段落的“几乎已满”的最后几行 这个TexExchange答案

更新：我怀疑，与这个最近问题。

Answer 1

这并不是确切的要求，但在紧急情况下可能会有所帮助。首先，让我们讨论一下这种方法的缺点：

1. 它需要一个环境ProcessPars来衬托要检查的文本。

2. 它无法从左边距计算 7 个字符；相反，它会寻找7ex宽度小于的最后一行。

3. 如果段落最后一行被挤压，则突出显示标记会自动显示在下一行。

MWE，其中符合要求的段落在左边距用红色项目符号标出。

\documentclass{article}
\usepackage{tabto,xcolor,environ}
\newcommand\checkloc{%
  \tabto*{-20pt}%
  \ifdim\TabPrevPos<7ex\relax\makemark\else%
    \ifdim\TabPrevPos>\dimexpr\linewidth-1em\relax\relax\makemark\fi%
  \fi
  \tabto{\TabPrevPos}%
}
\newcommand\makemark{\textcolor{red}{$\bullet$}}
\long\def\processparsaux#1\par#2\relax{%
  #1\checkloc\par\ifx\relax#2\relax\else\processparsaux#2\relax\fi%
}
\NewEnviron{ProcessPars}{\expandafter\processparsaux\BODY\par\relax}
\newcommand\showrules{%
  \noindent\hspace{7ex}\smash{\rule[-\textheight]{.4pt}{\textheight}}\hfill%
  \smash{\rule[-\textheight]{.4pt}{\textheight}}\hspace{1em}\mbox{}\par
}
\begin{document}
\showrules
\begin{ProcessPars}
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. 

This is a test. This is a test. This is a test. This is a test. This is big/fat.

This is a test. This is a test. This is a test. This is a test. This is a big test.

This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.

This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test.

This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.
\end{ProcessPars}
\end{document}