# Custom style for textcite with one author

I'm using biblatex to organize my bibliography. In case that \textcite{ref} only references a single author, I want to display the shortened first name. See the following MWE.

\documentclass{report}

\usepackage{filecontents}
\usepackage[backend=biber, style=alphabetic, language=USenglish]{biblatex}

\begin{filecontents}{\jobname.bib}
@Article{ref1,
Title                    = {Title 1},
Author                   = {Duck, Donald and Mouse, Mickey and Goofy, Goofy and Duck, Daisy},
Year                     = {2012},
Month                    = {Oct},
Number                   = {1},
}

@Article{ref2,
Title                    = {The influenza virus M2 protein cytoplasmic tail interacts with the M1 protein and influences virus assembly at the site of virus budding},
Author                   = {Duck, Donald},
Year                     = {2008},
Month                    = {Oct},
Number                   = {20},
}
\end{filecontents}

\begin{document}
\textcite{ref1}

\textcite{ref2}
\end{document}


The output of \textcite{ref2} is Duck [Duc08]. However, I want it to be D. Duck [Duc08]. The style for more authors should not be changed.

This is quite an inconsistent style, but it is easily possible with stykle=alphabetic.

\DeclareNameFormat{labelname}{%
\ifboolexpr{test {\ifnumequal{\value{listcount}}{1}}
and test {\ifnumequal{\value{liststop}}{1}}
and not test \ifmorenames}
{\ifuseprefix
{\usebibmacro{name:given-family}
{\namepartfamily}
{\namepartgiveni}
{\namepartprefix}
{\namepartsuffixi}}
{\usebibmacro{name:given-family}
{\namepartfamily}
{\namepartgiveni}
{\namepartprefixi}
{\namepartsuffixi}}}
{\usebibmacro{name:family}
{\namepartfamily}
{\namepartgiven}
{\namepartprefix}
{\namepartsuffix}}%
\usebibmacro{name:andothers}}

• How do I use this format? If I put it in the preamble of the document, the names do not show up at all. – W. Alpha Nov 20 '17 at 12:05
• Ok. I figured it out. I think there is a \nameparts{#1} missing as the first line of the new format. – W. Alpha Nov 20 '17 at 12:27
• @W.Alpha \nameparts{#1} is not needed any more in versions newer than 3.4, the current version is 3.8a. So you might want to think about an update. – moewe Nov 20 '17 at 17:30