Detect last row in biblatex-ext-tabular / formatting rules

Question

I am using biblatex-ext and longtable for typesetting a bib-based references table. For a better overview, I want to seperate the individual rows with rules and print a bold rule at the bottom as well. Due to aesthetic reasons, I reformatted the reoccuring rules as well and made them thinner and grey.

Unfortuately, the row seperator rule is also printed after the last row, just before the extra bottom rule:

From the biblatex-ext manual, there is no obvious option to distinguis any rows (e.g. even/odd rows): \defbibtabular{⟨name⟩}{⟨begin code⟩}{⟨end code⟩}{⟨row code⟩}.

How can I either

rearrange the whole rule-formatting code such that it fits into the biblatex-ext-tabular environment or
detect whether the row is the last row in the table (and hence omit the rule output) to avoid the double line at the end of my table?

MWE:

\documentclass[british]{article}
\usepackage[T1]{fontenc}
\usepackage{babel,csquotes}
\usepackage[backend=biber, style=authoryear]{biblatex}
\usepackage{biblatex-ext-tabular}
\usepackage{longtable,array,booktabs}
\usepackage{xcolor,colortbl}
\defbibtabular{bibtabular}
  {\begin{longtable}{@{}lll@{}}
     \toprule
     \textbf{Author} & \textbf{Title} & \textbf{Year}\
     \midrule[\heavyrulewidth]\endhead%
        \arrayrulecolor{black!30}%--prepare color for all midrules
        }
  {\arrayrulecolor{black}\bottomrule
   \end{longtable}}
  {\anchorlang{\usebibmacro{author/editor+others}}
   & \plainlang{\usebibmacro{title}}
   & \plainlang{\printdate}
     \\midrule[0.3pt]}
\begin{filecontents}{\jobname.bib}
@Book{Miller1832a,
  author       = {John Miller},
  title        = {Elementary book},
  year         = {1832},
}
@inbook{Smith1744a,
  author       = {Daniel Smith},
  booktitle    = {Collection of important articles},
  title        = {Noteworthy Article},
  year         = {1744},

}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
\nocite{*}
\printbibtabular
\end{document}

PS: This MWE is copied (and modified) from here

Would it be possible to extend the defbibtabular to \defbibtabular{⟨name⟩}{⟨begin code⟩}{⟨end code⟩}{⟨row code⟩}{⟨between row code⟩}? — kromuchi, Feb 23 '22 at 20:51

score 0 · Accepted Answer · answered Feb 28 '22 at 20:48

I dirty fix would be to add another last (and empty) row, but with negative row height such that the bold bottomrule line is just printed above the thin gray midrule line. It's not a nice solution, but it works:

Here the patched MWE (just must run it 2 or 3 times for the final result):

\documentclass[british]{article}
\usepackage[T1]{fontenc}
\usepackage{babel,csquotes}
\usepackage[backend=biber, style=authoryear]{biblatex}
\usepackage{biblatex-ext-tabular}
\usepackage{longtable,array,booktabs}
\usepackage{xcolor,colortbl}
\defbibtabular{bibtabular}
  {\begin{longtable}{@{}lll@{}}
     \toprule
     \textbf{Author} & \textbf{Title} & \textbf{Year}\
     \midrule[\heavyrulewidth]\endhead%
        \arrayrulecolor{black!30}%--prepare color for all midrules
        }
  {\[-0.6cm]\arrayrulecolor{black}\bottomrule
   \end{longtable}}
  {\anchorlang{\usebibmacro{author/editor+others}}
   & \plainlang{\usebibmacro{title}}
   & \plainlang{\printdate}
     \\midrule[0.3pt]}
\begin{filecontents}{\jobname.bib}
@Book{Miller1832a,
  author       = {John Miller},
  title        = {Elementary book},
  year         = {1832},
}
@inbook{Smith1744a,
  author       = {Daniel Smith},
  booktitle    = {Collection of important articles},
  title        = {Noteworthy Article},
  year         = {1744},

}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
\nocite{*}
\printbibtabular
\end{document}

Detect last row in biblatex-ext-tabular / formatting rules

1 Answers1