dramatist remove spacing between speech items

Question

I'm typesetting a drama script using the dramatist package, which defines the drama environment, which is basically a list environment, and each speech entry is a list item. Since I need to print the script several times, I want to reduce the space between the speech items.

The drama environment declares as follows:

\newenvironment{drama}{%
    \if@lnpa
    \PackageWarning{dramatist}{\lnpwarning{a}}
    \fi
    \if@lnps
    \PackageWarning{dramatist}{\lnpwarning{s}}
    \fi
    \list{}{%
        \labelwidth\speakswidth
        \itemindent\speaksindent
        \itemsep\speechskip
        \parsep\Dparsep
        \labelsep\Dlabelsep
        \let\makelabel\speakslabel}
    } {\endlist}

The dimensions are also declared in the dramatist.sty as follows:

\newdimen\speakswidth
\speakswidth\z@
\newdimen\speaksindent
\speaksindent=-\leftmargin
\newdimen\speechskip
\speechskip\itemsep
\newdimen\Dparsep
\Dparsep\z@
\newdimen\Dlabelsep
\Dlabelsep\labelsep

It even supports reading a config file:

\InputIfFileExists{dramatist.cfg}{\foundfile}{\inputfilewarning}

I figured out that the spacing between the items is probably set by the \speechskip-dimension, so I tried to create a config file with the following content:

\speechskip=0em
\speaksindent=0em

The package reads that config file, as stated in the log:

Package dramatist Warning: Using Configuration file dramatist.cfg. .

But neither the indents nor the skip between the items changes. I don't know why the config file isn't read correctly, since I think that the declarations of the dimensions I done are correct.

A MWE could look like:

\documentclass[oneside,12pt]{scrreprt}
\usepackage[ngerman]{babel}
\usepackage{scrpage2}
\usepackage[utf8]{inputenc}
\usepackage{dramatist}
\usepackage[x11names]{xcolor}
\usepackage{tcolorbox}
\usepackage[bookmarks]{hyperref}
\begin{document}
  \newcommand{\role}[1]{\textcolor{blue}{(\textit{#1})}}
  \begin{CharacterGroup}{Andere alte Leute}
  \GCharacter{Marta \role{Elisa}}{Marta}{marta}
  \end{CharacterGroup}
  \newcommand{\martax}[1]{\item\leavevmode\begin{tcolorbox}[title=\marta,colframe=red]#1\end{tcolorbox}}
  This is the regular document inset.
  \begin{drama}
    \martax{I can talk}
    This is the list inset.
    \martax{I can talk}
    \martax{I can talk}
    \martax{I can talk}
  \end{drama}
\end{document}

This produces the following output for me:

Any ideas on how to tighten the distance between the items are greatly appreciated! Thanks in advance ;)

Edit: Christian Hupfer's answer fixed the spacing between the speech boxes, which I very appreciate ;) What about the spacing to the left? Any ideas are welcome ;)

Edit 2: I also tried changing the source of dramatist.sty directly in order to fix the bad left indentation, but to no avail: (of course for testing purposes only)

\newenvironment{drama}{%
    ...
    \list{}{%
        ...
        \itemindent0em
        ...
    } {\endlist}

and:

\newenvironment{drama}{%
    ...
    \list{}{%
        ...
        \itemindent=0em
        ...
    } {\endlist}

Edit 3: Using Christian Hupfer's new solution, I was able to reduce the left indentation to a minimum. But there's still a tiny bit of spacing towards the left, and a bit more to right, not much, but it gets visible, when a speechbox is next to some other, unindented content like a colored parbox or some normal text (outside the drama environment). Is there a way to fix this last bit of unwanted spacing?

Answer 1

The tcolorbox package puts the tcolorbox environments in a paragraph, unless the option nobeforeafter is used. A better way to preserve the indents is to apply before={\hskip\dimexpr\leftmargin-\speechskip} and an empty after={}

The remaining spacing is \itemsep and the natural \interlineskip. Compare the difference between \martax and \martay

\documentclass[oneside,12pt]{scrreprt}
\usepackage[ngerman]{babel}
\usepackage{scrpage2}
\usepackage[utf8]{inputenc}
\usepackage{dramatist}
\usepackage[x11names]{xcolor}
\usepackage{tcolorbox}
\usepackage[bookmarks]{hyperref}
\begin{document}
  \newcommand{\role}[1]{\textcolor{blue}{(\textit{#1})}}
  \begin{CharacterGroup}{Andere alte Leute}
  \GCharacter{Marta \role{Elisa}}{Marta}{marta}
  \end{CharacterGroup}
  \newcommand{\martax}[1]{\item\mbox{}\begin{tcolorbox}[before={\hskip\dimexpr\leftmargin-\speechskip},after={},title=\marta,colframe=red]#1\end{tcolorbox}}
  \newcommand{\martay}[1]{\item\mbox{}\begin{tcolorbox}[title=\marta,colframe=blue]#1\end{tcolorbox}}

  This is the regular document inset.
  \begin{drama}
    \martax{I can talk}
    This is the list inset.
    \martax{I can talk}
    \martax{I can talk}
    \martax{I can talk}
  \end{drama}

  \begin{drama}
    \martay{I can talk}
    This is the list inset.
    \martay{I can talk}
    \martay{I can talk}
    \martay{I can talk}
  \end{drama}

\end{document}

Update

I changed the text inset and removed the \mbox{} commands which lead to the false horizontal spacings.

\documentclass[oneside,12pt]{scrreprt}
\usepackage[ngerman]{babel}
\usepackage{scrpage2}
\usepackage[utf8]{inputenc}
\usepackage{dramatist}
\usepackage[x11names]{xcolor}
\usepackage{tcolorbox}
\usepackage{xpatch}

\usepackage[bookmarks]{hyperref}

\newlength{\dramatextinset}
\setlength{\dramatextinset}{\dimexpr-\leftmargin+\labelsep}

\xapptocmd{\drama}{%
  \setlength{\parindent}{\dramatextinset}%
}{\typeout{Success}}{\typeout{Failure}}

\usepackage{showframe}

\newcommand{\role}[1]{\textcolor{blue}{(\textit{#1})}}
\begin{CharacterGroup}{Andere alte Leute}
  \GCharacter{Marta \role{Elisa}}{Marta}{marta}
\end{CharacterGroup}

\newcommand{\martax}[1]{\item\begin{tcolorbox}[before={},after={},title=\marta,colframe=red]#1\end{tcolorbox}}
\newcommand{\martay}[1]{\item\begin{tcolorbox}[title=\marta,colframe=blue]#1\end{tcolorbox}}

\begin{document}
This is the regular document inset.
\begin{drama}
  \martax{I can talk}

  This is the list inset.
  \martax{I can talk}
  \martax{I can talk}
  \martax{I can talk}
\end{drama}


\begin{drama}
  \martay{I can talk}
  This is the list inset.
  \martay{I can talk}
  \martay{I can talk}
  \martay{I can talk}
\end{drama}

\end{document}