我需要在 LaTeX 中允许电子邮件地址换行。我以前使用软件包来做到这一点url，地址在 @ 处换行，这是可以接受的。
我最近切换到xurl在其他 URL（不是电子邮件地址）中使用换行符，并注意到，一旦我这样做，我的电子邮件地址就会在边缘的任何字符处中断。这是有道理的，因为xurl允许在任何字母数字字符处换行，但我希望 LaTeX 优先在电子邮件地址的 @ 处换行，并且只在必要时在其他地方换行。我查看了本网站上的其他答案和其他在线资源，但我只能找到使用这些软件包允许换行的说明，而找不到有关如何创建在 @ 处换行（url软件包样式）而不是在其他地方换行的首选项（由 启用xurl）的说明。
如果 MWE 有用，我想镜像此输出：
\documentclass[12pt]{article}
\usepackage{url}
\urlstyle{same}
\begin{document}
\begin{minipage}{2in}
\url{[email protected]}
\end{minipage}
\end{document}
但是xurl启用了该包（因为我需要文件中的其他地方使用它来解决不同的问题）。
答案1
根据手册，您可以\useOriginalUrlSetting在组内使用旧设置：
{\useOriginalUrlSetting\url{[email protected]}}
答案2
也许像这样的方法可以达到目的：
\makeatletter
\AtBeginDocument{%
\@ifpackageloaded{hyperref}{%
\newcommand*\@printemailaddressUrlLeftCopy{}%
\newcommand\AtIfhyperrefloaded[2]{#1}%
}{%
\newcommand\AtIfhyperrefloaded[2]{#2}%
}%
\@ifpackageloaded{url}{}{\RequirePackage{url}}%
\@ifdefinable\printemailaddress{%
\DeclareRobustCommand\printemailaddress{%
\leavevmode\begingroup
\let\do\@makeother \dospecials \catcode`{\@ne \catcode`}\tw@ \catcode`\ =10 \catcode`\#=6 %
\@ifstar{%
\expandafter\expandafter\expandafter\@gobble
\expandafter\@gobbletwo\@printemailaddress
}{%
\AtIfhyperrefloaded{\expandafter\expandafter\expandafter\@firstofone}%
{\expandafter\expandafter\expandafter\@gobble}%
\expandafter\@gobbletwo\@printemailaddress
}%
}%
}%
\DeclareUrlCommand\@printemailaddress{%
{%
\let\@printemailaddressUrlLeftCopy= \UrlLeft
\def\UrlLeft##1\UrlRight{\href{mailto:##1}{\@printemailaddressUrlLeftCopy ##1\UrlRight}}%
}%
\def\UrlBreaks{\do\\\do\/\do\!\do\_\do\|\do\;\do\>\do\]%
\do\)\do\,\do\?\do\&\do\'\do+\do\=\do\#\do:%
\do\a\do\b\do\c\do\d\do\e\do\f\do\g\do\h\do\i\do\j\do\k\do\l%
\do\m\do\n\do\o\do\p\do\q\do\r\do\s\do\t\do\u\do\v\do\w\do\x\do\y\do\z%
\do\A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L%
\do\M\do\N\do\O\do\P\do\Q\do\R\do\S\do\T\do\U\do\V\do\W\do\X\do\Y\do\Z%
\do0\do1\do2\do3\do4\do5\do6\do7\do8\do9}%
\edef\UrlSpecials{%
\unexpanded\expandafter{\UrlSpecials
\do\@{\hbox{\string @}\hfil\penalty\numexpr\UrlBreakPenalty-206\relax\hfilneg}%
\do\.{\hbox{\string .}\hfil\penalty\numexpr\UrlBreakPenalty-205\relax\hfilneg}%
}%
}%
}%
}%
\makeatother
\documentclass[12pt]{article}
\usepackage{hyperref}
\usepackage{xurl}
\begin{document}
%\urlstyle{same}
\urlstyle{tt}
\twocolumn
\begin{minipage}{2in}
text \url{[email protected]} text
\end{minipage}
\bigskip
\hrule
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress{sample_username.something.else@nice.weirdlengthy.lengthydomainlengthydomainlengthydomain.com} text
\end{minipage}
\newpage
\begin{minipage}{2in}
text \csname \AtIfhyperrefloaded{nolink}{}url\endcsname{[email protected]} text
\end{minipage}
\bigskip
\hrule
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{[email protected]} text
\end{minipage}
\bigskip
\begin{minipage}{2in}%
text \printemailaddress*{sample_username.something.else@nice.weirdlengthy.lengthydomainlengthydomainlengthydomain.com} text
\end{minipage}
\end{document}
