我试图重现我在微类型文档中看到的标题样式（略有不同）：
我使用带有参数的 tufte-book 类，[openany]因此边距始终位于页面的右侧。示例表如下所示：
我的方法是用tcolorbox它来构建我的图形和表格（因为我在其他地方使用该包并且喜欢它的灵活性），从框到边缘画一条水平线，并通过修改其定义来完成标题内的线条。
由于我编程技能有限，我只能自己动手，想出一个接近我想要的结果，尽管代码可能会伤害任何优秀的 LaTeX 程序员的眼睛。我修改了标题定义，删除了冒号，引入了换行符，绘制了与标题宽度一样长的线（但不再是那么长\linewidth），并\parskip调整了垂直间距。代码如下：
\newlength{\captlength}%will contain caption length
\makeatletter
%%% below is unchanged code from tufte definitions
\long\def\@caption#1[#2]#3{%
\par%
\addcontentsline{\csname ext@#1\endcsname}{#1}%
{\protect\numberline{\csname the#1\endcsname}{\ignorespaces #2}}%
\begingroup%
\@parboxrestore%
\if@minipage%
\@setminipage%
\fi%
\@tufte@caption@font\@tufte@caption@justification%
%%%% and below is the modified code
\settowidth{\captlength}{#3}%capture caption length
\ifdim \captlength > \linewidth%make sure \captlength is not greater than
\linewidth
\setlength{\captlength}{\linewidth}
\fi %
\noindent\csname fnum@#1\endcsname\par\setlength{\parskip}
{-1ex}\noindent\color{gray}\raisebox{0.65ex}{\rule{\captlength}
{0.4pt}}\par\noindent\color{black}#3\par%add line breaks, gray rule and adjust
vertical spacing
\endgroup}
\makeatother
现在制作一个带有如下框架的表格tcolorbox：
\begin{table}[ht]
\centering
\begin{tcolorbox}[enhanced, remember, hbox, tcbox width=auto limited,
colback=white,arc=1pt,boxrule=0.4pt,colframe=gray]
\caption{A table with a caption.}
\begin{tabular}{lll}
first col. & second one & last one \\
filling this & and this too & some more text
\end{tabular}
\end{tcolorbox}
\end{table}
产生这个：
现在我需要从框的右边缘绘制连接水平线，并进行垂直偏移，以便使用 tcolorbox 的 tikz 实现与标题规则处于同一水平。我想我tikzpagenodes也可以从该包中受益，以获得边距节点定义。问题是 tikz 对我来说非常陌生，正如您从下面的蹩脚尝试中看到的那样：
\begin{table}[ht]
\centering
\begin{tcolorbox}[enhanced, remember, hbox, tcbox width=auto limited,
colback=white,arc=1pt,boxrule=0.4pt,colframe=gray,
overlay={\draw[gray,line width=0.4pt](frame.north east) edge[->] (current page marginpar area.west);}]
\caption{A table with a caption.}
\begin{tabular}{lll}
first col. & second one & last one \\
filling this & and this too & some more text
\end{tabular}
\end{tcolorbox}
\end{table}
输出：
我将不胜感激任何帮助。提前致谢！以下是完整代码：
% !TEX program = xelatex
\documentclass[openany, justified]{tufte-book}
\usepackage{tikzpagenodes,graphicx}
\usepackage[most]{tcolorbox}
\newlength{\captlength}%will contain caption length
\makeatletter
\long\def\@caption#1[#2]#3{%
\par%
\addcontentsline{\csname ext@#1\endcsname}{#1}%
{\protect\numberline{\csname the#1\endcsname}{\ignorespaces #2}}%
\begingroup%
\@parboxrestore%
\if@minipage%
\@setminipage%
\fi%
\@tufte@caption@font\@tufte@caption@justification%
\settowidth{\captlength}{#3}%capture caption length
\ifdim \captlength > \linewidth%make sure \captlength is not greater than
\linewidth
\setlength{\captlength}{\linewidth}
\fi %
\noindent\csname fnum@#1\endcsname\par\setlength{\parskip}
{-1ex}\noindent\color{gray}\raisebox{0.65ex}{\rule{\captlength}
{0.4pt}}\par\noindent\color{black}#3\par%add line breaks, gray rule and adjust
vertical spacing
\endgroup}
\makeatother
\begin{document}
\begin{table}[ht]
\centering
\begin{tcolorbox}[enhanced, remember, hbox, tcbox width=auto limited,
colback=white,arc=1pt,boxrule=0.4pt,colframe=gray,overlay={\draw[gray,line
width=0.4pt](frame.north east) edge[->] (current page marginpar area.west);}]
\caption{A table with a caption.}
\begin{tabular}{lll}
first col. & second one & last one \\
filling this & and this too & some more text
\end{tabular}
\end{tcolorbox}
\end{table}
\end{document}
答案1
最简单的方法是使用 tikzlibrary calc 符号。也有，[yshift=...]但并不总是有效。
% !TEX program = xelatex
\documentclass[openany, justified]{tufte-book}
\usepackage{tikzpagenodes,graphicx}
\usepackage[most]{tcolorbox}
\usetikzlibrary{calc}
\newlength{\captlength}%will contain caption length
\makeatletter
\long\def\@caption#1[#2]#3{%
\par%
\addcontentsline{\csname ext@#1\endcsname}{#1}%
{\protect\numberline{\csname the#1\endcsname}{\ignorespaces #2}}%
\begingroup%
\@parboxrestore%
\if@minipage%
\@setminipage%
\fi%
\@tufte@caption@font\@tufte@caption@justification%
\settowidth{\captlength}{#3}%capture caption length
\ifdim \captlength > \linewidth%make sure \captlength is not greater than
\linewidth
\setlength{\captlength}{\linewidth}
\fi %
\noindent\csname fnum@#1\endcsname\par\setlength{\parskip}
{-1ex}\noindent\color{gray}\raisebox{0.65ex}{\rule{\captlength}
{0.4pt}}\par\noindent\color{black}#3\par%add line breaks, gray rule and adjust
vertical spacing
\endgroup}
\makeatother
\begin{document}
\begin{table}[ht]
\centering
\begin{tcolorbox}[enhanced, remember, hbox, tcbox width=auto limited,
colback=white,arc=1pt,boxrule=0.4pt,colframe=gray,overlay={\draw[gray,line
width=0.4pt]($(frame.north east) + (0,-1ex)$) edge[->] ($(frame.north -| current page marginpar area.west) + (-1ex,-1ex)$);}]
\caption{A table with a caption.}
\begin{tabular}{lll}
first col. & second one & last one \\
filling this & and this too & some more text
\end{tabular}
\end{tcolorbox}
\end{table}
\end{document}