使用 \fcolorbox 突出显示文本，不带空格

Question

我想突出显示序列的一部分。问题是这\fcolorbox会移动文本，导致序列不再对齐。

\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\newcommand{\cbox}[1]{\fcolorbox{red!80}{yellow}{#1}}

\begin{document}
    \begin{table}[]
    %   \caption{}
        %\label{tab:my-table}
        \begin{tabular}{ll}
            Seq1 & gactttgtggacatcaacgtcggc\cbox{tgc}cccatcgacctcgtgtac \\
            Seq2 & gactttgtggacatcaacgtcggctgccccatcgacctcgtgtac \\
            Seq3 & gactttgtggacatcaacgtcggctgccccatcgacctcgtgtac \\
            & *****************************************       
        \end{tabular}
    \end{table}
\end{document}

我怎样才能删除插入的空格\fcolorbox？

PS：\makebox()没帮助。

Answer 1

您可以消除在框周围插入的空间和规则的影响：

\documentclass{article}

\usepackage{xcolor,array}

\newcommand{\cbox}[1]{{%
  \setlength{\fboxsep}{-\fboxrule}% Remove impact of space and rule inserted by box
  \fcolorbox{red!80}{yellow}{\strut#1}%
}}

\begin{document}

\begin{tabular}{ l >{\ttfamily} l }
  Seq1 & gactttgtggacatcaacgtcggc\cbox{tgc}cccatcgacctcgtgtac \\
  Seq2 & gactttgtggacatcaacgtcggctgccccatcgacctcgtgtac \\
  Seq3 & gactttgtggacatcaacgtcggctgccccatcgacctcgtgtac \\
       & *********************************************
\end{tabular}

\end{document}

---

您还可以\fcolorbox通过捕获文本的位置来设置背景（使用zref的savepos模块）并\phantom通过eso-pic。

\documentclass{article}

\usepackage{xcolor,array,zref-savepos,eso-pic}

\newcounter{cboxcntr}
\newcommand{\cbox}[1]{{%
  \stepcounter{cboxcntr}% Allow for unique \cbox
  \zsavepos{cbox-\thecboxcntr}% Capture (x,y) coordinate of cbox
  #1%
  \begingroup
  \edef\x{\endgroup\noexpand\AddToShipoutPictureBG*{%
    \noexpand\AtPageLowerLeft{%
      \noexpand\setlength{\noexpand\fboxsep}{.5\noexpand\fboxsep}% Reduce the fbox padding
      \noexpand\hspace*{\dimexpr\zposx{cbox-\thecboxcntr}sp-\fboxsep-\fboxrule}%
      \noexpand\raisebox{\zposy{cbox-\thecboxcntr}sp}{%
        \noexpand\fcolorbox{red!80}{yellow}{\noexpand\phantom{\noexpand\ttfamily\noexpand\strut#1}}%
      }%
    }%
  }}\x%
}}

\begin{document}

\begin{tabular}{ l >{\ttfamily} l }
  Seq1 & gactttgtggacatcaacgtcggc\cbox{tgc}cccatcgacctcgtgtac \\
  Seq2 & gactttgtgg\cbox{aca}tcaacgtcggctgccccatcgacctcgtgtac \\
  Seq3 & gactttgtggacatcaacgtcggctgccccatcgac\cbox{ctcg}tgtac \\
       & *********************************************
\end{tabular}

\end{document}

Answer 2

我的回答受到启发这个。

使用此代码（我改变了颜色以提高可读性）：

\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{soul}

\newcommand{\hlc}[2][yellow]{{%
        \colorlet{foo}{#1}%
        \sethlcolor{foo}\hl{#2}}%
}
\newcommand{\mybox}[1]{\hlc[red!40!yellow]{#1}}
\begin{document}
    \begin{table}[]
        %   \caption{}
        %\label{tab:my-table}
        \begin{tabular}{ll}
            Seq1 & gactttgtggacatcaacgtcggc\mybox{tgc}cccatcgacctcgtgtac \\
            Seq2 & gactttgtggacatcaacgtcggctgccccatcgacctcgtgtac \\
            Seq3 & gactttgtggacatcaacgtcggctgccccatcgacctcgtgtac \\
            & *****************************************       
        \end{tabular}
    \end{table}

\end{document}

您得到了期望的结果：