Long form of acronyms capitalized in section headings

Question

I use the glossaries package and defined headers often in section titles.

In general I keep the first letter of each word in the headings in capital case, but if an acronym occurs the first time, it is printed in full length, but I can only capitalize the first letter by command.

\documentclass{scrartcl}

\usepackage[acronym]{glossaries}
\newacronym{test}{TTSbCiH}{this text should be capitalized in headings}
\makeglossaries

\begin{document}
\section{\Gls{test}}
\Glsfirst{test}

\glsfirst{test}
\end{document}

which looks like

But, it should rather be "1 This Text Should Be Capitalized In Headings" (even better was "1 This Text Should be Capitalized in Headings")

How can I achieve that?

Answer 1

I would patch this setup by adding a macro \Glsheading that retrieves a capitalized version of the long acronym description. So, you could say something like

\section{\Glsheading{test}}

In the glossaries package those things are accomplished with token registers. For your purpose it will be sufficent to store the relevant information into a macro. Hence a definition of \Glsheading could look like

\newcommand{\Glsheading}[1]{\@nameuse{gls@cap@head@#1}}

Now, you need to include a little module to \newacronym that stores the control sequence gls@cap@head@#1, or in your example case \gls@cap@head@test (=> "This Text Should Be Capitalized In Headings (TTSbCiH)"):

\LetLtxMacro{\gls@newacronym}{\newacronym}
\renewcommand{\newacronym}[4][]{%
  \gls@newacronym[#1]{#2}{#3}{#4}
  \@namedef{gls@cap@head@#2}{\capitalize{#4} (#3)}}
\newcommand{\Glsheading}[1]{\@nameuse{gls@cap@head@#1}}

_{Note: This definition uses the letltxmacro package and a helper macro \capitalize (given in the complete code)}

\documentclass{scrartcl}
\usepackage[acronym]{glossaries}

%<begin_patch>
\usepackage{letltxmacro}
\makeatletter
\LetLtxMacro{\gls@newacronym}{\newacronym}
\renewcommand{\newacronym}[4][]{%
  \gls@newacronym[#1]{#2}{#3}{#4}
  \@namedef{gls@cap@head@#2}{\capitalize{#4} (#3)}}
\newcommand{\Glsheading}[1]{\@nameuse{gls@cap@head@#1}}
\makeatother

\newcommand{\capitalize}[1]{%
  \ignorespaces
  \expandafter\expandafter\expandafter
  \xcapitalize\expandafter\space #1 \relax}
\def\xcapitalize#1 #2{%
  #1%
  \ifx\relax#2\else
    \space\MakeUppercase{#2}%
    \expandafter\xcapitalize
  \fi}
%<end_patch>

\newacronym{test}{TTSbCiH}{this text should be capitalized in headings}
\makeglossaries

\begin{document}
\section{\Glsheading{test}}
\Glsfirst{test}\\
\glsfirst{test}

\printglossaries
\end{document}