Beamer 与 Biblatex：调整参考书目的块分隔符缩进宽度

Question

我正在使用带有 biblatex 的 beamer 创建参考书目，并重新定义了模板中的“块”。为了在块内添加一些填充，我使用了 adjustwidth 命令。当我将参考书目放入未添加填充（即未使用 adjustwidth）的块中时，每个 bib 条目的第一行从最左边开始，并且该条目的后续行将缩进。

但是，当添加 adjustwidth 命令时，此行为会被破坏，并且第一个元素之后的每个元素都会完全缩进（包括第一行），这使得参考书目难以阅读并且看起来不一致。

如果有人能帮助我保持缩进正确，同时仍在块中进行填充，我将不胜感激。

这是一个展示该行为的最小工作示例：

Tex 文件：

\documentclass[final]{beamer}

\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[orientation=portrait,size=a0,scale=1.0]{beamerposter}
\RequirePackage{exscale}
\RequirePackage{ragged2e}
\RequirePackage{changepage}
\RequirePackage{calc}
\usepackage[backend=bibtex, style=authoryear]{biblatex}
\setcounter{biburllcpenalty}{7000}
\setbeamertemplate{bibliography item}{}
\bibliography{bibliography.bib}

% Block
\setbeamertemplate{block begin}
{
  \begin{beamercolorbox}[colsep*=0ex,dp=2ex,center]{block title}
    \vskip0pt
    \begin{adjustwidth}{1ex}{1ex}
    \centering
    \usebeamerfont{block title}\insertblocktitle
    \end{adjustwidth}
    \vskip-1.25ex
    \begin{beamercolorbox}[colsep=0.025ex]{block separator}\end{beamercolorbox}
  \end{beamercolorbox}
  {\parskip0pt\par}
  \usebeamerfont{block body}
  \vskip-0.5ex
  \begin{beamercolorbox}[colsep*=0ex]{block body}
  \justifying
  \begin{adjustwidth}{1ex}{1ex}
  \setlength{\parskip}{1ex}
  \vskip-2ex
}
\setbeamertemplate{block end}
{
  \end{adjustwidth}
  \vskip1ex
  \end{beamercolorbox}
  \vskip0pt
  \vspace*{2ex}
}

\title{Some title}

\begin{document}

\begin{frame}
\begin{columns}
\begin{column}{0.5\paperwidth}
This is a test \autocite{AndersonStrongMixedintegerProgramming2020} and \autocite{AndersonStrongMixedintegerProgramming2021}
\end{column}
\begin{column}{0.5\paperwidth}
\begin{block}
\printbibliography
\end{block}
\end{column}
\end{columns}

\end{frame}
\end{document}

和 bib 文件：

@article{AndersonStrongMixedintegerProgramming2020,
  title = {Strong Mixed-Integer Programming Formulations for Trained Neural Networks},
  author = {Anderson, Ross and Huchette, Joey and Ma, Will and Tjandraatmadja, Christian and Vielma, Juan Pablo},
  date = {2020-09-01},
  journaltitle = {Mathematical Programming},
  shortjournal = {Math. Program.},
  volume = {183},
  number = {1},
  pages = {3--39},
  issn = {1436-4646},
  doi = {10/gnbscf},
  url = {https://doi.org/10.1007/s10107-020-01474-5},
  urldate = {2021-11-04},
  langid = {english}
}

@article{AndersonStrongMixedintegerProgramming2021,
  title = {Strong Mixed-Integer Programming Formulations for Trained Neural Networks 2},
  author = {Andersons, Ross and Huchette, Joey and Ma, Will and Tjandraatmadja, Christian and Vielma, Juan Pablo},
  date = {2020-09-01},
  journaltitle = {Mathematical Programming},
  shortjournal = {Math. Program.},
  volume = {183},
  number = {1},
  pages = {3--39},
  issn = {1436-4646},
  doi = {10/gnbscf},
  url = {https://doi.org/10.1007/s10107-020-01474-5},
  urldate = {2021-11-04},
  langid = {english}
}

Answer 1

要更改块内的边距，我可以使用left-/rightskip或sep选项beamercolorbox：

\documentclass[final]{beamer}

\usecolortheme{orchid}

\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[orientation=portrait,size=a0,scale=1.0]{beamerposter}
\RequirePackage{exscale}
\RequirePackage{ragged2e}
%\RequirePackage{changepage}
\RequirePackage{calc}
\usepackage[backend=bibtex, style=authoryear]{biblatex}
\setbeamertemplate{bibliography item}{}
\addbibresource{biblatex-examples.bib}
\usepackage{lipsum}

\setbeamertemplate{block begin}
{
  \par\vskip\medskipamount%
  \begin{beamercolorbox}[colsep*=.75ex,center]{block title}
    \usebeamerfont*{block title}\insertblocktitle%
  \end{beamercolorbox}%
  {\parskip0pt\par}%
  \ifbeamercolorempty[bg]{block title}
  {}
  {\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}%
  \usebeamerfont{block body}%
  \begin{beamercolorbox}[colsep*=.75ex,vmode,leftskip=1cm,rightskip=1cm]{block body}%
    \ifbeamercolorempty[bg]{block body}{\vskip-.25ex}{\vskip-.75ex}\vbox{}%
}
\setbeamertemplate{block end}  
{\end{beamercolorbox}\vskip\smallskipamount}

\title{Some title}

\begin{document}

\begin{frame}

\begin{block}{title}
\lipsum
\end{block}

\begin{columns}

\begin{column}{0.4\paperwidth}
This is a test \autocite{knuth:ct} and \autocite{westfahl:space}
\end{column}

\begin{column}{0.4\paperwidth}
\begin{block}{}
\begin{minipage}{\linewidth-2cm}
\printbibliography
\end{minipage}
\end{block}
\end{column}
\end{columns}

\end{frame}
\end{document}