我想定义一个\shorttextcite仅打印第一作者和“et.al.”的命令。
标准行为\textcite应该authoryear不是被改变。
示例和 MWE：
% !TeX program=lualatex
\documentclass{scrartcl}
\usepackage{fontspec}
\usepackage[style=authoryear-comp,backend=biber]{biblatex}
\usepackage[main=ngerman,english]{babel}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@Article{john1980,
author = {M. John},
title = {A new view on the wheel},
journal = {Proceedings in Transportation},
year = {1980},
}
@Article{john1981,
author = {M. John and J. Mary},
title = {A new view on the wheel II},
journal = {Proceedings in Transportation},
year = {1981},
}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
\textcite{john1980,john1981}
\printbibliography
\end{document}
得出：
应该\shorttextcite输出“John et. al. (1980,1981)”，但\textcite仍然应该与现在相同。
答案1
这基本上是一个副本，但\textcite使用了一点小技巧，只比较名字而不是整个名字列表，以检查我们是否压缩引用。
通常情况下，我们只需使用字段namehash来比较名称列表（实际上这\textcite通常是这样做的），但namehash要遵守截断设置并考虑引文中显示的所有名称。我们只关注第一作者，因此我们需要一种方法来访问他们的hash。这hash只有在处理名称时才可用，因此我们使用来自的技巧biblatex：动态过滤参考文献中特定作者的出版物并使用索引命令。索引命令允许我们处理姓名列表而不打印任何内容。
对于每部作品的第一作者，我们都会提取他的哈希值以及他是单独工作还是“等人”的信息。此信息被保存并与上一次引用进行比较。如果上一次引用的状态相同，则压缩它们。
\documentclass{scrartcl}
\usepackage[style=authoryear-comp,backend=biber]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@Article{john1980,
author = {M. John and B. Fairy},
title = {A new view on the wheel},
journal = {Proceedings in Transportation},
year = {1980},
}
@Article{john1981,
author = {M. John and J. Mary},
title = {A new view on the wheel II},
journal = {Proceedings in Transportation},
year = {1981},
}
@Article{john1982,
author = {M. John},
title = {A new view on the wheel III},
journal = {Proceedings in Transportation},
year = {1983},
}
\end{filecontents}
\addbibresource{\jobname.bib}
\addbibresource{biblatex-examples.bib}
\makeatletter
\DeclareIndexNameFormat{cbx@chr@getfirstauthorhash}{%
\ifnumequal{\value{listcount}}{1}
{\savefield{hash}{\cbx@thishash}%
\ifmorenames
{\gappto{\cbx@thishash}{@alone}}
{\gappto{\cbx@thishash}{@etal}}}
{}}
\newbibmacro*{shorttextcite}{%
\indexnames[cbx@chr@getfirstauthorhash][1-1]{labelname}%
\ifdefequal{\cbx@thishash}{\cbx@lasthash}
{\iffieldundef{shorthand}
{\ifthenelse{\iffieldequals{labelyear}{\cbx@lastyear}\AND
\(\value{multicitecount}=0\OR\iffieldundef{postnote}\)}
{\setunit{\addcomma}%
\usebibmacro{cite:extradate}}
{\setunit{\compcitedelim}%
\usebibmacro{cite:labeldate+extradate}%
\savefield{labelyear}{\cbx@lastyear}}}
{\setunit{\compcitedelim}%
\usebibmacro{cite:shorthand}%
\global\undef\cbx@lastyear}}
{\ifnameundef{labelname}
{\iffieldundef{shorthand}
{\usebibmacro{cite:label}%
\setunit{%
\global\booltrue{cbx:parens}%
\printdelim{nonameyeardelim}\bibopenparen}%
\ifnumequal{\value{citecount}}{1}
{\usebibmacro{prenote}}
{}%
\usebibmacro{cite:labeldate+extradate}}
{\usebibmacro{cite:shorthand}}}
{\printnames[labelname][1-1]{labelname}%
\setunit{%
\global\booltrue{cbx:parens}%
\printdelim{nameyeardelim}\bibopenparen}%
\ifnumequal{\value{citecount}}{1}
{\usebibmacro{prenote}}
{}%
\iffieldundef{shorthand}
{\iffieldundef{labelyear}
{\usebibmacro{cite:label}}
{\usebibmacro{cite:labeldate+extradate}}%
\savefield{labelyear}{\cbx@lastyear}}
{\usebibmacro{cite:shorthand}%
\global\undef\cbx@lastyear}}%
\stepcounter{textcitecount}%
\global\let\cbx@lasthash\cbx@thishash}%
\setunit{%
\ifbool{cbx:parens}
{\bibcloseparen\global\boolfalse{cbx:parens}}
{}%
\textcitedelim}}
\DeclareCiteCommand{\cbx@shorttextcite}
{\usebibmacro{cite:init}%
\global\undef\cbx@thishash}
{\usebibmacro{citeindex}%
\usebibmacro{shorttextcite}}
{}
{\usebibmacro{textcite:postnote}}
\DeclareCiteCommand{\shorttextcite}[\cbx@textcite@init\cbx@shorttextcite]
{\gdef\cbx@savedkeys{}%
\citetrackerfalse%
\pagetrackerfalse%
\DeferNextCitekeyHook%
\usebibmacro{cite:init}%
\global\undef\cbx@thishash}
{\ifthenelse{\iffirstcitekey\AND\value{multicitetotal}>0}
{\protected@xappto\cbx@savedcites{()(\thefield{multipostnote})}%
\global\clearfield{multipostnote}}
{}%
\xappto\cbx@savedkeys{\thefield{entrykey},}%
\indexnames[cbx@chr@getfirstauthorhash][1-1]{labelname}%
\ifdefequal{\cbx@thishash}{\cbx@lasthash}
{}
{\stepcounter{textcitetotal}%
\global\let\cbx@lasthash\cbx@thishash}}
{}
{\protected@xappto\cbx@savedcites{%
[\thefield{prenote}][\thefield{postnote}]{\cbx@savedkeys}}}
\makeatother
\begin{document}
\shorttextcite{john1980,john1981}
\shorttextcite{knuth:ct:a,knuth:ct:b}
\shorttextcite{john1982,john1981}
\shorttextcite{john1982,john1981,john1980}
\printbibliography
\end{document}
