Adjust left margin of list of algorithms

Question

How can I adjust the left margin of the list of algorithms?

What I have tried

For the list of figures and tables, the left margin could be adjusted like explained in Adjusting left margin of LOT and LOF :

\renewcommand\l@figure{\@dottedtocline{1}{0em}{2.3em}}
\renewcommand\l@table{\@dottedtocline{1}{0em}{2.3em}}

However, this does not work:

\renewcommand\l@algorithm{\@dottedtocline{1}{0em}{2.3em}}

The margin is not affected and I get the following warning:

Command \l@algorithm undefined. \renewcommand\l@algorithm

I have tried several variations: l@algorithms, l@algo, but none works. I was able to find the definition of l@figure in book.cls, but I could not find anything related to list of algorithms.

MWE

\documentclass{scrbook}
\makeatletter
\renewcommand\l@figure{@dottedtocline{1}{0em}{2.3em}}
\makeatother
\usepackage{algorithm}
\begin{document}
\begin{algorithm}
    \caption{An algorithm}
\end{algorithm}
\begin{figure}
    \caption{A figure}
\end{figure}
\listoffigures
\listofalgorithms
\end{document}

Output:

esdd · Answer 1 · 2022-02-15T18:12:39.077

The KOMA-Script classes load and use package tocbasic. Therefore you do not have to redefine internal commands.

The indent of figure and table entries can be changed by

\DeclareTOCStyleEntries[indent=0pt]{tocline}{figure,table}

If you want to clone the figure settings for the algorithm entries, you can use:

%get list of algorithms under control of tocbasic:
\addtotoclist[float]{loa}
\renewcommand{\listofalgorithms}{\listoftoc[\listalgorithmname]{loa}}
% algorithm entries should use same settings as figure entries
\DeclareTOCStyleEntry[
  level:=figure,
  indent:=figure,
  numwidth:=figure
]{tocline}{algorithm}

Example:

\documentclass{scrbook}
\usepackage{algorithm}
% adjust the indent of figure and table entries
\DeclareTOCStyleEntries[indent=0pt]{tocline}{figure,table}
%get list of algorithms under control of tocbasic:
\addtotoclist[float]{loa}
\renewcommand{\listofalgorithms}{\listoftoc[\listalgorithmname]{loa}}
% algorithm entries should use same settings as figure entries
\DeclareTOCStyleEntry[
  level:=figure,
  indent:=figure,
  numwidth:=figure
]{tocline}{algorithm}
\begin{document}
\begin{algorithm}\caption{An algorithm}\end{algorithm}
\begin{figure}\caption{A figure}\end{figure}
\begin{table}\caption{A table}\end{table}
\listoffigures
\listoftables
\listofalgorithms
\end{document}

score 4 · Accepted Answer · answered Feb 15 '22 at 17:08

From how the \listofalgorithms and \listof are defined,

$ latexdef -p algorithm -s listofalgorithms
% algorithm.sty, line 97:
\newcommand{\listofalgorithms}{\listof{algorithm}{\listalgorithmname}}
$ latexdef -p float -s \listof
% float.sty, line 127:
\newcommand*{\listof}[2]{%
  @ifundefined{ext@#1}{\float@error{#1}}{%
    @namedef{l@#1}{@dottedtocline{1}{1.5em}{2.3em}}%
    \float@listhead{#2}%
    \begingroup\setlength{\parskip}{\z@}%
      @starttoc{@nameuse{ext@#1}}%
    \endgroup}}

we can see \l@algorithm is not defined until \listof{algorithm}{...} is used. This explains the error Command \l@algorithm undefined., and will also overwrite existing definition of \l@algorithm.

In example below the problem is solved by redefining \l@algorithm at the beginning of aux file \jobname.loa, which is input by \@starttoc{\@nameuse{ext@#1}} in \listof.

\documentclass{scrbook}
\usepackage{algorithm}
\makeatletter
\renewcommand\l@figure{@dottedtocline{1}{0em}{2.3em}}
\addtocontents{loa}{%
  \protect\renewcommand\protect\l@algorithm{\protect@dottedtocline{1}{0em}{2.3em}}%
  \protected@file@percent%
}
\makeatother
\begin{document}
\begin{algorithm}
    \caption{An algorithm}
\end{algorithm}
\begin{figure}
    \caption{A figure}
\end{figure}
\listoffigures
\listofalgorithms
\end{document}

$outpuf of \listoffigures$ $output of \listofalgorithms$

Adjust left margin of list of algorithms

2 Answers2