重新定义 `\uline`，使 `\colorbox` 也在本地定义为具有下划线文本

Question

初始问题：

我想用以下代码为文本添加连续下划线：

\uline{No underlining for \colorbox{lightgray}{everything} inside the colorbox.}

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解决方法：

一个办法为了获得内部文本的连续行\colorbox，请执行以下操作：

\sbox0{\uline{\hspace{\fboxsep}everything\hspace{\fboxsep}}}
\uline{No underlining for \colorbox{lightgray}{\hspace{-\fboxsep}\usebox0\hspace{-\fboxsep}} inside the colorbox.}

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问题：

我该如何重新定义\uline，以便每个\colorbox内部\uline都按照上面的解决方法所示进行本地定义，以便也具有下划线的文本？

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麦格维：

\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{xcolor}
\usepackage[normalem]{ulem}

\begin{document}

\uline{No underlining for \colorbox{lightgray}{everything} inside the colorbox.}

\end{document}

---

Answer 1

重新定义\uline包括的重新定义\colorbox。

\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{xcolor}
\usepackage[normalem]{ulem}

\makeatletter
\long\def\afterelsefi#1\else#2\fi{\fi#1}
\long\def\afterfi#1\fi{\fi#1}
\def\q@mark{\q@mark}
\newcommand\uline@colorbox[3][\q@mark]
  {%
    \ifx\q@mark#1%
      \afterelsefi\colorbox@orig{#2}%
    \else
      \afterfi\colorbox@orig[#1]{#2}%
    \fi
    {%
      % nested \uline becomes a second rule which is a bit lower than first
      % the following changes the values of \UL@height and \ULdepth so that the
      % calculation done by ulem results in the original values
      \advance\UL@height\ULdepth
      \advance\ULdepth-\thr@@\UL@height
      \hskip-\fboxsep
      \uline{\hskip\fboxsep#3\hskip\fboxsep}%
      \hskip-\fboxsep
    }%
  }
\let\colorbox@orig\colorbox
\protected\def\uline
  {%
    \relax
    \ifmmode
      \expandafter\underline
    \else
      \bgroup
      \let\colorbox\uline@colorbox % this is added compared to the original definition
      \expandafter\ULset
    \fi
  }
\makeatother

\begin{document}

\uline{No underlining for \colorbox{lightgray}{everything} inside the colorbox.}

\end{document}

Answer 2

这是使用节点的方法tikz，在节点底部画一条线。但是，这不适用于文本换行，即如果文本比文本宽度宽，则会失败。

原则上，在我看来，下划线并不是最好的印刷标记方式。

\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{xcolor}
%\usepackage[normalem]{ulem}
\usepackage{tikz}

\newcommand{\underlinethis}[3][0.15\baselineskip]{%
  \tikz[remember picture,baseline=(A.base)]{% 
    \node[inner sep=0pt,outer sep=0pt] (A) {#3}; % Place the node and typeset the text
    \draw[#2] ([yshift=#1]A.south west) -- ([yshift=#1]A.south east); % Draw the line, shifted up by some value
  }%
}

\begin{document}
\underlinethis{blue, line width=1pt}{No underlining for \colorbox{lightgray}{everything} inside the colorbox.}

\underlinethis{red, line width=1pt,dashed}{No underlining for \colorbox{lightgray}{everything} inside the colorbox.}
\end{document}

Answer 3

不要加下划线。曾经。

如果您不想遵循上述建议，请注意，当您调用\uline宏\uline时，它会再添加 1.2pt，因为它认为您想要双下划线。

\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{xcolor}
\usepackage[normalem]{ulem}

\let\ulemuline\uline
\renewcommand{\uline}[1]{%
  \begingroup
  \redefinecolorbox
  \ulemuline{#1}%
  \endgroup
}
\let\latexcolorbox\colorbox
\newcommand\redefinecolorbox{%
  \renewcommand\colorbox[2]{%
    \latexcolorbox{##1}{%
      \advance\ULdepth-1.2pt
      \kern-\fboxsep
      \ulemuline{\hspace{\fboxsep}##2\hspace{\fboxsep}}%
     \kern-\fboxsep
    }%
  }%
}

\begin{document}

\uline{No underlining for \colorbox{lightgray}{everything} inside the colorbox.}

\end{document}