List of letter not folding in glossaries

Question

In glossaries, using the option listhypergroup, there is a problem when the list of letters is too long and the page too narrow: as it does not fold, it goes over the page width to give

Is there a fix for this issue ?

\documentclass{article}
\usepackage[left = 8cm, right = 8cm, showframe]{geometry}
\usepackage{hyperref}
\usepackage[nogroupskip]{glossaries}

\newglossaryentry{Almond}{ name=Almond,  description={A fruit},
  sort={Almond}  }
\newglossaryentry{Berry}{ name=Berry,  description={Another fruit},
  sort={Berry}  }
\newglossaryentry{Cherry}{ name={Cherry},  description={Yet another fruit},
  sort={Cherry}  }
\newglossaryentry{Date}{ name={Date},  description={Yet another fruit},
  sort={Date}  }
\newglossaryentry{Elderberry}{ name={Elderberry},  description={Yet another fruit},
sort={Elderberry}  }
  \newglossaryentry{Flour}{ name={Flour},  description={Not a fruit but useful for cakes}, sort={Flour}}
\newglossaryentry{Grenade}{ name={Grenade},  description={Only the one that does not blow up is a fruit},  sort={Grenade}  }
\newglossaryentry{Hammer}{ name={Hammer},  description={Definitely not a fruit},  sort={Hammer}  }


\newglossaryentry{Tomato}{ name={Tomato},  description={Again another fruit},
  sort={Tomato}  }
\newglossaryentry{Strawberry}{ name={Strawberry},  description={Not a fruit},
  sort={Strawberry}  }
\newglossaryentry{Walnut}{ name={Walnut},  description={Shell fruit},
  sort={Walnut}  }


\makenoidxglossaries

\begin{document}
\gls{Almond}, \gls{Berry}, \gls{Cherry}, \gls{Elderberry}, \gls{Grenade}, \gls{Walnut} and \gls{Tomato} are fruits, unlike \gls{Strawberry}, \gls{Hammer} and \gls{Flour}.

%\renewcommand{\glssymbolsgroupname}{Non-fruits}
\printnoidxglossary[sort=standard,style=listhypergroup]
\end{document}

Answer 1

The reason the navigation line is not breaking is that (for some reason) it is typeset within a description environment and the code is:

\item[<navigation line>]

I don't know why that is, but it turns out it can be easily fixed as the navigation line is set through the \glossaryheader command. The only trick here is that since we are in a description environment, we want to avoid having the indentation that is associated with this environment, hence why I surround the navigation line in a \parbox in the solution below.

\documentclass{article}
\usepackage[
  hmargin=8cm,
  showframe
]{geometry}
\usepackage{hyperref}
\usepackage[
  style=listhypergroup,
]{glossaries}
\renewcommand{\glossaryheader}{\item \parbox{0.9\textwidth}{\glsnavigation}}

\newglossaryentry{A}{name=A, description={Letter of the alphabet}}
\newglossaryentry{B}{name=B, description={Letter of the alphabet}}
\newglossaryentry{C}{name=C, description={Letter of the alphabet}}
\newglossaryentry{D}{name=D, description={Letter of the alphabet}}
\newglossaryentry{E}{name=E, description={Letter of the alphabet}}
\newglossaryentry{F}{name=F, description={Letter of the alphabet}}
\newglossaryentry{G}{name=G, description={Letter of the alphabet}}
\newglossaryentry{H}{name=H, description={Letter of the alphabet}}
\newglossaryentry{I}{name=I, description={Letter of the alphabet}}
\newglossaryentry{J}{name=J, description={Letter of the alphabet}}
\newglossaryentry{K}{name=K, description={Letter of the alphabet}}
\newglossaryentry{L}{name=L, description={Letter of the alphabet}}
\newglossaryentry{M}{name=M, description={Letter of the alphabet}}
\newglossaryentry{N}{name=N, description={Letter of the alphabet}}
\newglossaryentry{O}{name=O, description={Letter of the alphabet}}
\newglossaryentry{P}{name=P, description={Letter of the alphabet}}
\newglossaryentry{Q}{name=Q, description={Letter of the alphabet}}
\newglossaryentry{R}{name=R, description={Letter of the alphabet}}
\newglossaryentry{S}{name=S, description={Letter of the alphabet}}
\newglossaryentry{T}{name=T, description={Letter of the alphabet}}
\newglossaryentry{U}{name=U, description={Letter of the alphabet}}
\newglossaryentry{V}{name=V, description={Letter of the alphabet}}
\newglossaryentry{W}{name=W, description={Letter of the alphabet}}
\newglossaryentry{X}{name=X, description={Letter of the alphabet}}
\newglossaryentry{Y}{name=Y, description={Letter of the alphabet}}
\newglossaryentry{Z}{name=Z, description={Letter of the alphabet}}

\makeglossaries

\begin{document}
\glsaddall
\printglossary
\end{document}

Lastly, if you want to replace the | separator with something else, you have to redefine \glshypernavsep:

\renewcommand*{\glshypernavsep}{\space}