Theorem environment identation error with hyperref

Question

So I want to indent my theorem text like on this post but when I use \usepackage{hyperref}, the theorem name gets shifted out of the document frame. E.g.

\documentclass[
    toc=chapterentrydotfill,
    numbers=endperiod
    ]
    {scrreprt}
\usepackage{hyperref}
\usepackage{amsthm}
\usepackage{etoolbox}
\usepackage{thmtools}
\usepackage{lipsum}
\swapnumbers
\makeatletter
\patchcmd@thm
    {\trivlist}
    {\list{}{\leftmargin2.5em\itemindent-15em}}
    {}{}
\newcommand{\xdeclaretheorem}[2][]{%
    \declaretheorem[#1]{#2}%
    \expandafter\patchcmd\csname thmt@original@end#2\endcsname
    {\endtrivlist}{\endlist}{}{}%
}
\declaretheoremstyle[
    headfont=\kern-2.5em\bfseries,
    headpunct = {.},
    notebraces = {[}{]},
    bodyfont = \normalfont,
    postheadspace = 5pt,
    spacebelow = 5pt,
    spaceabove = 5pt]{thms}
\xdeclaretheorem[style = thms, name = Theorem, numberwithin = chapter]{thm}
\xdeclaretheorem[style = thms, name = Lemma, sibling = thm]{lem}
\begin{document}
\chapter{Chapter}
        \begin{lem}
            \lipsum[1]
        \end{lem}
\end{document}

outputs

instead of

The second picture is the same code as above, but with the hyperref package removed. How do I fix this?

Welcome on SE, @HannaBloom! In the above MWE there is no hyperref command. Could you include it? Because the position of this command within the document is relevant. — tanGIS, Jun 19 '20 at 20:13

score 2 · Accepted Answer · answered Jun 19 '20 at 19:57

The hyperref package does its own patching to \@thm, so we need to delay ours after it.

\documentclass[
  toc=chapterentrydotfill,
  numbers=endperiod
]{scrreprt}
\usepackage{etoolbox}
\usepackage{amsthm}
\usepackage{thmtools}
\usepackage{hyperref}
\usepackage{lipsum}
\swapnumbers
\makeatletter
\AtBeginDocument{% we need to wait after hyperref has done its own patching
  \patchcmd@thm
    {\trivlist}
    {\list{}{\leftmargin2.5em\itemindent-15em}}
    {}{}%
}
\newcommand{\xdeclaretheorem}[2][]{%
    \declaretheorem[#1]{#2}%
    \expandafter\patchcmd\csname thmt@original@end#2\endcsname
    {\endtrivlist}{\endlist}{}{}%
}
\declaretheoremstyle[
    headfont=\kern-2.5em\bfseries,
    headpunct = {.},
    notebraces = {[}{]},
    bodyfont = \normalfont,
    postheadspace = 5pt,
    spacebelow = 5pt,
    spaceabove = 5pt]{thms}
\xdeclaretheorem[style = thms, name = Theorem, numberwithin = chapter]{thm}
\xdeclaretheorem[style = thms, name = Lemma, sibling = thm]{lem}
\begin{document}
\chapter{Chapter}
\begin{lem}\label{test}
\lipsum[1][1-4]
\end{lem}
\ref{test}
\end{document}

Theorem environment identation error with hyperref

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