是否可以在 xelatex 中为单词首字母设置特定的字符变体？

Question

我希望有一些代码来设置文档范围内的字母“v”的特定字符变体，仅当它是单词中的第一个字母时才使用。MWE 中的解决方案不是解决方案，因为我有一份几百页的文档。有什么建议吗？谢谢。

\documentclass[a4paper,14pt,openright,twoside]{memoir}
\usepackage[T1]{fontenc}
\usepackage[scale=1,osf,nf,lf]{ebgaramond}
\usepackage{fontspec}
\usepackage{microtype}
\usepackage{csquotes}
\usepackage{realscripts}

\begin{document}

Normal set:
{\fontshape{it}
    \addfontfeature{RawFeature=+hlig}
        \addfontfeature{CharacterVariant=5:2}
            \addfontfeature{RawFeature=+liga}
                \addfontfeature{RawFeature=+dlig}
                    \addfontfeature{RawFeature=+swsh}
                        \addfontfeature{Numbers=OldStyle}
                            \selectfont 

Ha visto un valvassore vivere come un valvassino invidioso che gridava evviva!}         

Nice to have:
{\fontshape{it}
    \addfontfeature{RawFeature=+hlig}
        \addfontfeature{CharacterVariant=5:1}
            \addfontfeature{RawFeature=+liga}
                \addfontfeature{RawFeature=+dlig}
                    \addfontfeature{RawFeature=+swsh}
                        \addfontfeature{Numbers=OldStyle}
                            \selectfont                 

Ha {\addfontfeature{CharacterVariant=5:2}v}isto un {\addfontfeature{CharacterVariant=5:2}v}alvassore {\addfontfeature{CharacterVariant=5:2}v}ivere come un {\addfontfeature{CharacterVariant=5:2}v}alvassino invidioso che gridava evviva!} 
\end{document}

Answer 1

您可以使用字符类：

\documentclass[a4paper,14pt,openright,twoside]{memoir}
\usepackage{fontspec}

\setmainfont{EB Garamond}[
  Numbers=Lining,
  ItalicFeatures={
    RawFeature=+hlig,
    RawFeature=+liga,
    RawFeature=+dlig,
    RawFeature=+swsh,
    Numbers=OldStyle,
  },
]
\newfontfamily\varv{EB Garamond}[
  Numbers=Lining,
  ItalicFeatures={
    RawFeature=+hlig,
    RawFeature=+liga,
    RawFeature=+dlig,
    RawFeature=+swsh,
    Numbers=OldStyle,
    CharacterVariant=5:2,
  },
]

\XeTeXinterchartokenstate=1
\newXeTeXintercharclass\vclass
\XeTeXcharclass`v=\vclass
\XeTeXinterchartoks 255 \vclass = {\openswashv}

\makeatletter
\newcommand\openswashv{%
  % by preceding the v with U+200C it's not at the boundary any more
  \ifnum\strcmp{\f@shape}{it}=\z@
    \begingroup\varv^^^^200cv\endgroup
    \nobreak\hspace{0pt}% allow hyphenation in the rest of the word
    \expandafter\@gobble
  \fi
}
\makeatother


\begin{document}

Normal font:
  Ha visto un valvassore vivere come un valvassino invidioso che gridava evviva!

Italic font: {\itshape
  Ha visto un valvassore vivere come un valvassino invidioso che gridava evviva!
}

\end{document}

这允许对单词的其余部分进行连字（但对于意大利语以外的语言，可能会产生错误的连字点）。我检查过，EB Garamond 没有定义v和 之间的任何字距调整对。

您应该向字体开发人员索取一套风格集。