longfbox (6dec15)

git-svn-id: svn://tug.org/texlive/trunk@39028 c570f23f-e606-0410-a88d-b1316a301751

2 files changed, 2197 insertions, 0 deletions

diff --git a/Master/texmf-dist/tex/latex/longfbox/longbox.sty b/Master/texmf-dist/tex/latex/longfbox/longbox.sty
new file mode 100644
index 00000000000..9d373895f2b
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/longfbox/longbox.sty
@@ -0,0 +1,853 @@
+%---------------------------------------------------------------------------
+%  Copyright 2015 Daan Leijen, Microsoft Corporation.
+%
+%  This work may be distributed and/or modified under the
+%  conditions of the LaTeX Project Public License, either version 1.3
+%  of this license or (at your option) any later version.
+%  The latest version of this license is in
+%    http://www.latex-project.org/lppl.txt
+%  and version 1.3 or later is part of all distributions of LaTeX
+%  version 2005/12/01 or later.  
+%---------------------------------------------------------------------------
+\NeedsTeXFormat{LaTeX2e}[1995/12/01]
+
+\ProvidesPackage{longbox}[2015/12/01, Daan Leijen, Provides basic longbox that can break over pages]
+\RequirePackage{options}
+
+\@ifclassloaded{beamer}{%
+ \newcommand\lb@savefootnotes{}%
+ \newcommand\lb@restorefootnotes{}%
+}%
+{\RequirePackage{footnote}%
+ \newcommand\lb@savefootnotes{\savenotes}%
+ \newcommand\lb@restorefootnotes{\spewnotes}%
+}
+
+
+% --------------------------------------------------------
+% Debugging
+% --------------------------------------------------------
+
+\newcommand*\lb@debug[1]{%
+  \ontoggle{lb@debug}{\typeout{longbox debug: #1}}%
+}
+\newcommand*\lb@typeout[1]{%
+  \ontoggle{lb@verbose}{\typeout{longbox: #1}}%
+}
+\newcommand*\lb@warncannotsplit{%
+  \PackageWarning{longbox}{Cannot split box; it seems you are using a non-splittable contents}%
+}
+\newcommand*\lb@warnbadsplit[1]{%
+  \PackageWarning{longbox}{Bad split (underful vbox by \the#1)}%
+}
+
+
+% --------------------------------------------------------
+% Utilities for LaTeX internals
+% --------------------------------------------------------
+
+% Suppress the indentation on the following paragraph
+\providecommand\nofirstindent{\@afterindentfalse\@afterheading}
+
+% Suppress the paragraph skip on the following paragraph
+\providecommand\nofirstparskip{\addvskip{-\parskip}}
+
+% In contrast to addvspace, addvskip is not suppressed in a minipage
+\providecommand\addvskip[1]{%
+  \ifvmode
+    \ifdim\lastskip=\z@
+      \vskip #1\relax
+    \else
+      \@tempskipb#1\relax\@xaddvskip
+    \fi
+  \else\@noitemerr\fi
+}
+
+
+% Skip to 0.3\baselineskip multiple taking prevdepth into account.
+\newskip\lb@prevdepth
+\newcommand\lb@skiptobaseline{%
+  \global\lb@prevdepth=-\@m\p@\relax
+  \ifvmode
+    \ifdim\lastskip=\z@\relax
+      \ifdim\prevdepth=-\@m\p@\else
+        \dimen@\prevdepth
+        % Calculate the modulus of the previous depth with 0.3|\baselineskip| in |\dimen@|.
+        \@tempcnta\prevdepth
+        \@tempskipa=0.3\baselineskip\relax
+        \@tempcntb=\@tempskipa\relax
+        \divide \@tempcnta by \@tempcntb
+        \dimen@\prevdepth
+        \advance\dimen@ -\@tempcnta\@tempskipa
+        % Skip back by that amount, and then skip by 0.3|\baselineskip|.
+        \vskip -\dimen@
+        \vskip \@tempskipa\relax
+        \global\lb@prevdepth=\@tempskipa\relax        
+      \fi
+    \fi
+  \fi
+}
+
+% unvbox a box, and return a vbox with a given background color
+% \unvcolorbox{<colorspec>}{<vboxname>}
+\newcommand\unvcolorbox[2]{%
+  \ifoptionblank{#1}{\vbox{\unvbox#2}}{%
+    \lb@debug{vcolorbox: #1}%
+    \vbox{\offinterlineskip
+      \hbox to \z@{\vbox to \z@{\optioncolor{#1}\hrule\@width\wd#2\@height\ht#2\@depth\dp#2\vss}\hss}%
+      \unvbox#2%  
+    }%
+  }%
+}
+
+% create a vbox with a given background color 
+\newcommand\vcolorbox[2]{%
+  \eifblank{#1}{\vbox{#2}}{%
+    \setbox\z@=\vbox{#2}\relax
+    \unvcolorbox{#1}{\z@}%
+  }%
+}%
+
+% --------------------------------------------------------
+% The following macros come from mdframed
+% --------------------------------------------------------
+
+% Determine the amount of free space left on the current page
+\newlength\lb@freevspace
+\newcommand*\lb@setfreevspace@page{%
+  \lb@debug{ determine free space}%
+  \bgroup\@nobreakfalse\addpenalty\z@\egroup%
+  \penalty\@M\relax\vskip 2\baselineskip\relax%
+  \penalty9999\relax\vskip -2\baselineskip\relax%
+  \penalty9999%
+  \ifdim\pagegoal=\maxdimen\relax%
+    \lb@freevspace=\vsize%
+  \else
+    \lb@freevspace=\dimexpr\pagegoal-\pagetotal-\parskip\relax%
+  \fi
+  \lb@debug{free space: \the\lb@freevspace, in page: \the\textheight, vsize=\the\vsize}%
+}
+
+\newcommand*\lb@shiftdim[2]{%
+  %\letoption{#1}\lb@list
+  \expandafter\lb@setheadtail@#1,\relax
+  \eifblank{\lb@head}{}{\option@invoke{/longbox/@breakat-previous}{\lb@head}}%
+  #2\option{/longbox/@breakat-previous}%
+  \eifblank{\lb@tail}{}{\let#1\lb@tail}% push back tail
+}
+\def\lb@comma{,}%
+\def\lb@setheadtail@#1,#2\relax{%
+  \def\lb@head{#1}%
+  \def\lb@tail{#2}% adds commas!
+}
+
+\newcommand*\lb@setfreevspace{%
+  \eifblank{\lb@breakat}{\lb@setfreevspace@page}{%
+    \def\lb@eject{\par}%no eject
+    \lb@extrasplit=\z@\relax%
+    \lb@shiftdim{\lb@breakat}\lb@freevspace
+    \ifdim\lb@freevspace>\z@\else\lb@setfreevspace@page\fi
+  }%
+}
+
+
+% Suppress overfull-underfull vbox messages
+\newcommand*\lb@ignorevbadness{%
+   \edef\lb@currentvbadness{\the\vbadness}%
+   \edef\lb@currentvfuzz{\the\vfuzz}%
+   \vbadness=\@M\relax%
+   \vfuzz=\maxdimen\relax%
+   \afterassignment\lb@restorevbadness
+}
+\newcommand*\lb@restorevbadness{%
+  \vbadness=\lb@currentvbadness\relax
+  \vfuzz=\lb@currentvfuzz\relax
+}
+
+
+% --------------------------------------------------------
+% The 'long vbox' (lvbox) environment collects long material 
+% into a long \vbox, instead of a \hbox like a lrbox in latex.
+% The collected box can contain any box, minipage, lrbox, fbox etc,
+% but not outer-par material like a figure. Footnotes can be
+% dealt with useing lb@savefootnotes.
+%
+% The material is typeset in a \vbox according to a given width.
+% inside the environment, the boolean 'inlvbox' is true.
+%
+% \begin{lvbox}{<boxname>}{<width>}
+% --------------------------------------------------------
+
+\newif\ifinlvbox
+\newcommand\lvbox[4]{%
+ \setbox#1\vbox\bgroup
+   \begingroup
+   \inlvboxtrue
+   % reset defaults
+   \let\if@nobreak\iffalse
+   \let\if@noskipsec\iffalse
+   \let\par\@@par
+   \let\-\@dischyph
+   \let\'\@acci\let\`\@accii\let\=\@acciii
+   % set margin and linewidth
+   \leftmargin=#2\relax\rightmargin=#4\relax
+   \@totalleftmargin=\leftmargin%
+   %\leftskip=#2\relax\rightskip=#4\relax\@rightskip=#4\relax
+   \linewidth=#3\relax
+   % set primitive tex margins
+   \leftskip=\@totalleftmargin%
+   \rightskip=\rightmargin%
+   \@rightskip=\rightmargin%
+   \hsize=\dimexpr\@totalleftmargin+\linewidth+\rightmargin\relax
+   \columnwidth\hsize
+   \textwidth\hsize
+   \nofirstindent
+   %\nofirstparskip
+}
+\def\endlvbox{\endgroup\egroup}
+
+
+
+% --------------------------------------------------------
+%
+% --------------------------------------------------------
+
+
+\newsavebox\lb@headbox
+\newsavebox\lb@savebox
+\newsavebox\lb@mainbox
+
+% --------------------------------------------------------
+%
+% --------------------------------------------------------
+
+\newcommand\lb@setbaseline[1]{%
+  %\typeout{ set baseline, \the\dp#1,\the\ht#1}%
+  \ifcase\lb@baseline%
+    \relax%bottom
+  \or%middle
+    \setbox#1=\vbox{\hbox{\lower \dimexpr(\dp#1 + \ht#1)/2 - \dp#1\relax\vbox{\unvbox#1}}}%
+  \or%top
+    \setbox#1=\vtop{\unvbox#1}%
+  \fi  
+  %\typeout{ .new dim: \the\dp#1, \the\ht#1}%
+}
+
+
+\@ifundefined{define@key}{}%
+ {\define@key{longbox}{options}{\options{#1}\option{/longbox/adjust-options}}}%
+  
+\newcommand*\lb@render@breakbox{%
+  %\typeout{render breakbox entry (in output routine), height=\the\bb@height}%
+  \bb@restorekeys{longbox}%
+  \lb@skiptop=\ifbb@isfirst\option{/longbox/skip-top}\else\option{/longbox/skip-break-top}\fi\relax
+  \lb@skipbottom=\ifbb@islast\option{/longbox/skip-bottom}\else\option{/longbox/skip-break-bottom}\fi\relax
+  \lb@skipbreaktop=\ifbb@isfirst 0pt\else\option{/longbox/skip-break-top}\fi
+  \lb@skipbreakbottom=\ifbb@islast 0pt\else\option{/longbox/skip-break-bottom}\fi
+  %\typeout{ render: skip top=\the\lb@skiptop, bottom=\the\lb@skipbottom, break-top=\the\dimexpr\option{/longbox/skip-bottom}}%
+  \options{%
+    /longbox/@part-height=\bb@height + \lb@skipbreaktop + \lb@skipbreakbottom,
+    /longbox/@part-width=\option{/longbox/width} + \option{/longbox/skip-left} + \option{/longbox/skip-right},%\bb@width,
+    /longbox/@part-depth=0pt,
+    /longbox/@part-needtop=\ifbb@isfirst true\else false\fi,
+    /longbox/@part-needbottom=\ifbb@islast true\else false\fi,
+    /longbox/@content-box-height=\option{/longbox/@part-height} - \lb@skiptop - \lb@skipbottom,
+    /longbox/@content-box-width=\option{/longbox/width},
+    /longbox/@content-box-depth=\option{/longbox/@part-depth},
+  }%
+  %\typeout{breakbox: width=\expandafter\the\option{/longbox/width}, \the\bb@width, \the\dimexpr\option{/longbox/@part-width}}%
+  \vbox{%
+    \kern -\lb@skipbreaktop% todo: move to breakbox?
+    \option{/longbox/render}%
+    \kern -\lb@skipbreakbottom
+  }%
+}
+
+\newcommand*\lb@render@vbox[1]{%
+  \lb@debug{render vbox entry}%
+  \lb@restoreoptions    
+  \lb@skiptop=\dimexpr\iftoggle{/longbox/@part-needtop}{\option{/longbox/skip-top}}{\option{/longbox/skip-break-top}}\relax
+  \lb@skipbottom=\dimexpr\iftoggle{/longbox/@part-needbottom}{\option{/longbox/skip-bottom}}{\option{/longbox/skip-break-bottom}}\relax
+  %\typeout{ skip top=\the\lb@skiptop, bottom=\the\lb@skipbottom}%
+  % add top skip while maintaining the baseline.
+  \ifdim\lb@skiptop=\z@\relax\else
+    \setbox\z@=\vtop{\unvcopy#1}%
+    \dimen@=\ht\z@
+    \setbox#1=\vbox{\offinterlineskip
+      \hrule width \z@ height \dimexpr\dimen@ + \lb@skiptop\relax depth -\dimen@
+      \unvbox#1%
+    }%
+  \fi
+  % add bottom skip while maintaining the baseline. 
+  \ifdim\lb@skipbottom=\z@\relax\else
+    \dimen@=\dp#1%
+    \setbox#1=\vbox{\offinterlineskip\unvbox#1\hrule width \z@ height -\dimen@ depth \dimexpr\dimen@ + \lb@skipbottom\relax}%
+  \fi
+  \lb@setbaseline{#1}%
+  \options{%
+    /longbox/@part-height=\dimexpr\ht#1 + \dp#1\relax,
+    /longbox/@part-width=\dimexpr\wd#1 + \option{/longbox/skip-left} + \option{/longbox/skip-right}\relax,
+    /longbox/@part-depth=\dp#1,
+    /longbox/@content-box-width=\option{/longbox/width},
+    /longbox/@content-box-height=\option{/longbox/@part-height} - \lb@skiptop - \lb@skipbottom,
+    /longbox/@content-box-depth=\option{/longbox/@part-depth} - \lb@skipbottom,   
+  }%
+  %\typeout{ longbox: height=\the\dimexpr\option{/longbox/@content-box-height}, outer height=\the\dimexpr\option{/longbox/@part-height}\relax}%
+   % lower the box depending on vertical alignment
+  \ifcase\option{/longbox/vertical-align/@ord}\relax
+    \@tempdima\z@
+  \or
+    %bottom
+    \@tempdima\dimexpr0.3\baselineskip - \option{/longbox/@part-depth}\relax
+  \or%middle
+    \@tempdima\dimexpr0.5\option{/longbox/@part-height} - \option{/longbox/@part-depth}\relax
+  \or%top
+    \@tempdima\dimexpr\option{/longbox/@part-height}-\option{/longbox/@part-depth}-0.7\baselineskip\relax
+  \or%text-bottom
+    \@tempdima\dimexpr0.3\baselineskip - \option{/longbox/@part-depth}\relax
+  \or%text-top
+    \@tempdima\dimexpr\option{/longbox/@part-height}-\option{/longbox/@part-depth}-0.7\baselineskip\relax
+  \or%super
+    \@tempdima=-0.9ex%
+  \or%sub
+    \@tempdima=0.7ex%
+  \else
+    \@tempdima\z@
+  \fi
+  \advance\@tempdima by -\option{/longbox/raise}%
+  \option@invoke{/longbox/@lower}{\@tempdima}%  
+  \noindent\hbox{\lower \@tempdima\vbox{\offinterlineskip
+    \hbox to \z@{%
+      \vbox to \z@{%
+        \hbox{\lower \option{/longbox/@part-height}\vbox{\offinterlineskip{\option{/longbox/render}}}}%
+        \vss}%
+      \hss
+    }%
+    \hbox{%
+      \ifdim\option{/longbox/skip-left}=\z@\else\hskip\option{/longbox/skip-left}\fi
+      \box#1%
+      \ifdim\option{/longbox/skip-right}=\z@\else\hskip\option{/longbox/skip-right}\fi
+      %$\box#1%
+    }%    
+  }}%
+}
+
+\newcommand*\lb@single@[1]{%
+  \begingroup
+    \toggletrue{/longbox/@part-needtop}%
+    \toggletrue{/longbox/@part-needbottom}%
+    \lb@render@vbox{#1}%
+  \endgroup
+}
+\newcommand*\lb@first@[1]{%
+  \begingroup
+    \toggletrue{/longbox/@part-needtop}%
+    \togglefalse{/longbox/@part-needbottom}%
+    \lb@render@vbox{#1}%
+    \lb@eject
+  \endgroup
+}
+\newcommand*\lb@middle@[1]{%
+  \begingroup
+    \togglefalse{/longbox/@part-needtop}%
+    \togglefalse{/longbox/@part-needbottom}%
+    \lb@render@vbox{#1}%
+    \lb@eject
+  \endgroup
+}
+\newcommand*\lb@last@[1]{%
+  \begingroup
+    \togglefalse{/longbox/@part-needtop}%
+    \toggletrue{/longbox/@part-needbottom}%
+    \lb@render@vbox{#1}%
+  \endgroup
+}
+
+% --------------------------------------------------------
+%
+% --------------------------------------------------------
+
+\newcommand*\lb@env@start{%
+  \ifcase\lb@textalign\relax
+     %default
+  \or\raggedright
+  \or\centering
+  \or\raggedleft
+  \else\relax% justify=default
+  \fi
+  \lb@insertbefore
+}
+
+\newcount\lb@usevbox
+\newlength\lb@width
+\newlength\lb@height
+\newlength\lb@skiptop
+\newlength\lb@skipright
+\newlength\lb@skipbottom
+\newlength\lb@skipleft
+\newlength\lb@skipbreaktop
+\newlength\lb@skipbreakbottom
+\newlength\lb@outerwidth
+\newlength\lb@extrasplit
+\newcount\lb@textalign
+\newcount\lb@baseline
+\newtoggle{lb@baselineskip}%
+\newtoggle{lb@breakable}%
+\newtoggle{lb@debug}%
+\newtoggle{lb@verbose}%
+\def\lb@breakat{}%
+\def\lb@halign{}%
+\def\lb@eject{}%
+\def\lb@insertafter{}
+\def\lb@insertbefore{}
+
+\newcommand*\lb@peekoptions[1]{%
+  % process options inside a group and just set necessary parameters
+  % this way, nested boxes don't influence each other's parameters
+  \begingroup
+    \options{#1}%
+    \option{/longbox/adjust-options}%    
+    \protected@edef\lb@temp{\endgroup
+      \lb@width=\the\dimexpr\option{/longbox/width}\relax
+      \lb@height=\the\dimexpr\option{/longbox/height}\relax
+      \lb@textalign=\the\numexpr\option{/longbox/text-align/@ord}\relax
+      \lb@baseline=\the\numexpr\option{/longbox/baseline/@ord}\relax
+      \lb@skiptop=\the\dimexpr\option{/longbox/skip-top}\relax
+      \lb@skipright=\the\dimexpr\option{/longbox/skip-right}\relax
+      \lb@skipbottom=\the\dimexpr\option{/longbox/skip-bottom}\relax
+      \lb@skipleft=\the\dimexpr\option{/longbox/skip-left}\relax
+      \lb@skipbreaktop=\the\dimexpr\option{/longbox/skip-break-top}\relax
+      \lb@skipbreakbottom=\the\dimexpr\option{/longbox/skip-break-bottom}\relax      
+      \lb@usevbox=\iftoggle{/longbox/use-vbox}{1}{0}\relax
+      \lb@outerwidth=\the\dimexpr\option{/longbox/outer-width}\relax
+      \lb@extrasplit=\the\dimexpr\option{/longbox/split-minimum}\relax
+      \def\noexpand\lb@insertafter{\option{/longbox/insert-after}}%
+      \def\noexpand\lb@insertbefore{\option{/longbox/insert-before}}%
+      \def\noexpand\lb@breakat{\option{/longbox/breakat}}%
+      \def\noexpand\lb@halign{\option{/longbox/height-align}}%
+      \def\noexpand\lb@eject{\option{/longbox/eject}}%
+      \noexpand\csname toggle\iftoggle{/longbox/baseline-skip}{true}{false}\endcsname{lb@baselineskip}%
+      \noexpand\csname toggle\iftoggle{/longbox/breakable}{true}{false}\endcsname{lb@breakable}%
+      \noexpand\csname toggle\iftoggle{/longbox/debug}{true}{false}\endcsname{lb@debug}%
+      \noexpand\csname toggle\iftoggle{/longbox/verbose}{true}{false}\endcsname{lb@verbose}%
+    }%
+  \lb@temp
+}
+
+\newenvironment{longbox@env}[2]{%
+  % save options
+  \lb@peekoptions{#1,#2}%
+  %
+  \ifnum\lb@usevbox=0\relax
+    \lb@debug{start breakbox}%
+    \let\bb@render\lb@render@breakbox
+    \bb@savekeys{longbox}{options={#1,#2,outer-width=\the\lb@outerwidth}}%
+    \iftoggle{lb@baselineskip}{\typeout{**insert bskip}}{\typeout{**suppress bskip}\vskip 1pt}%
+    \begin{breakbox}%
+    \ifdim\lb@skiptop=\z@\relax\else\vspace{\lb@skiptop}\fi%
+    \dimen@=\dimexpr\linewidth-\lb@skipleft-\lb@width\relax
+    \begin{bb@margins}{\lb@skipleft}{\dimen@}%    
+  \else
+    \lb@debug{start vbox}%
+    \def\lb@restoreoptions{\options{#1,#2}\option{/longbox/adjust-options}}%
+    \lb@savefootnotes
+    \dimen@=\dimexpr\linewidth-\lb@skipleft-\lb@width\relax
+    \lb@debug{ width=\the\lb@width, linewidth=\the\linewidth, skipleft=\the\lb@skipleft, right=\the\lb@skipright, total right=\the\dimen@}%
+    \iftoggle{lb@baselineskip}{\lb@skiptobaseline}{\lb@prevdepth=-\@m pt}%
+    \lvbox{\lb@mainbox}{0pt}{\lb@width}{0pt}%{\lb@skipleft}{\lb@width}{\lb@skipright}%
+    \prevdepth=\lb@prevdepth
+  \fi
+    \ifcase\lb@textalign\relax
+     %default
+    \or\raggedright
+    \or\centering
+    \or\raggedleft
+    \else\relax% justify=default
+    \fi
+    \lb@insertbefore
+    \begingroup
+}{%
+    \par\unskip
+    \endgroup
+    \lb@insertafter
+    %\ifdim\lb@skipbottom=\z@\relax\else\vskip\lb@skipbottom\fi%
+  \ifnum\lb@usevbox=0\relax
+    \end{bb@margins}%
+    \ifdim\lb@skipbottom=\z@\relax\else\hrule width \z@ height \lb@skipbottom\fi%\vspace{\lb@skipbottom}\fi%
+    \iftoggle{lb@baselineskip}{}{\vskip 1sp}%
+    \end{breakbox}%
+    \lb@debug{end breakbox}%
+  \else
+    \ontoggle{lb@baselineskip}{\lb@skiptobaseline}%
+    \endlvbox%  
+    \lb@debug{initial lvbox: \the\dp\lb@mainbox, \the\ht\lb@mainbox, \the\wd\lb@mainbox}%
+    \lb@processbox
+    %\setbox\lb@mainbox=\hbox{\lower \lb@skipbottom\vbox{\offinterlineskip\unvbox\lb@mainbox}}%
+    \lb@restorefootnotes
+    \lb@debug{end vbox}%
+  \fi
+}
+
+\newcommand\longbox@cmd[3]{%  
+  \begingroup
+  %\options{/options/collectunknown,/longbox/scoped,#2}% set scoped options first
+  %\option{/longbox/scoped/@adjust-options}%
+  \lb@peekoptions{#1,#2}%
+  \leavevmode
+  %\setbox\lb@mainbox=\hbox{%
+  %  \begingroup
+  %  #3%
+  %  \endgroup
+  %}%
+  \setbox\lb@mainbox=\hbox{%
+    \begingroup
+      \ifcase\lb@textalign\relax
+        %default=left
+      \or%left
+      \or\hss%center
+      \or\hss%right
+      \else%justify
+      \fi
+      \lb@insertbefore
+      #3%
+      \lb@insertafter
+      \ifnum\lb@textalign<3\relax\hss\fi% default,left,center
+    \endgroup
+  }%
+  \options{#1,#2}%
+  \ifdim\option{/longbox/width}=-1sp\relax
+    \options{/longbox/width=\wd\lb@mainbox}%set to natural width
+  \fi
+  \option{/longbox/adjust-options}%
+  % make it a vbox 
+  \setbox\lb@mainbox=\vbox{\offinterlineskip%
+    \hbox to \option{/longbox/width}{%
+      \unhbox\lb@mainbox
+    }%
+  }%
+  \def\lb@restoreoptions{}%
+  \letoption{/longbox/height-align}\lb@halign
+  \lb@height=\option{/longbox/height}\relax
+  \lb@baseline=\option{/longbox/baseline/@ord}\relax
+  \lb@processbox
+  \endgroup
+}
+
+\newcommand\lb@processbox{%
+  \ifdim\lb@height<0pt\relax
+    \lb@setbaseline{\lb@mainbox}%
+  \else
+    \lb@restrictheight
+  \fi
+  \lb@typesetbox
+}
+
+\newcommand\lb@typesetbox{%  
+  \ifinlvbox
+    \iftoggle{lb@breakable}{%
+      %\lb@debug{disable breakable due to nesting of long-boxes}%
+      \togglefalse{lb@breakable}%
+    }{}%
+  \fi
+  \ifhmode\lb@single@{\lb@mainbox}\else\lb@typeset\fi  
+}
+
+% --------------------------------------------------------
+%
+% --------------------------------------------------------
+
+\newcommand\lb@restrictheight{%
+  \lb@typeout{restrict height to \the\lb@height}%
+  \lb@splitheight=\lb@height%
+  %lb@debug{before height split: \the\dp\lb@mainbox, \the\ht\lb@mainbox, \the\wd\lb@mainbox}%
+  \lb@splitbox
+  \ifdim\ht\lb@headbox=0pt\relax
+    %split failed.. do nothing
+    \lb@debug{could not restrict height}%
+  \else
+    % store splitted off content in the mainbox (and discard the rest)
+    \setbox\lb@mainbox\vbox{\unvbox\lb@headbox}%
+    \lb@debug{restricted height to \the\ht\lb@mainbox}%
+  \fi
+  % set baseline
+  \lb@setbaseline{\lb@mainbox}%
+  % height align
+  %\letoption{/longbox/height-align}\lb@halign
+  \eifstrequal{\lb@halign}{bottom}%
+    {\setbox\lb@mainbox=\vbox{\hbox{\vbox to \lb@splitheight{\vss\unvbox\lb@mainbox}}}}%
+  {\eifstrequal{\lb@halign}{middle}%
+    {\dimen@=\dimexpr\lb@splitheight-\ht\lb@mainbox-\dp\lb@mainbox\relax
+     \setbox\lb@mainbox=\vbox{\hbox{%
+            \lower \dimexpr0.5\dimen@ + \dp\lb@mainbox\relax%
+            \vbox to \lb@splitheight{\vss\unvbox\lb@mainbox\vss}}}}%
+    {% default is top
+     \dimen@=\dimexpr\lb@splitheight-\ht\lb@mainbox-\dp\lb@mainbox\relax
+     \setbox\lb@mainbox=\vbox{\vtop to \lb@splitheight{\box\lb@mainbox\vss}}%
+    }%
+  }%
+}
+
+% --------------------------------------------------------
+%
+% --------------------------------------------------------
+
+\newlength\lb@neededvspace
+\newcommand\lb@typeset[1][0pt]{%
+  \iftoggle{lb@breakable}{%
+    \lb@setfreevspace
+    \setlength\lb@neededvspace{\dimexpr\ht\lb@mainbox+\dp\lb@mainbox+\lb@skiptop+\lb@skipbottom\relax}%
+    \lb@debug{needed: \the\lb@neededvspace, available: \the\lb@freevspace}%
+    \ifdim\lb@neededvspace<\lb@freevspace\relax
+      \lb@single@{\lb@mainbox}%
+    \else
+      \lb@typeout{longbox needs splitting}%
+      \setlength\lb@splitheight{\dimexpr\lb@freevspace-\lb@skiptop-\lb@skipbreakbottom\relax}%
+      \lb@splitbox
+      \ifdim\ht\lb@headbox=0pt\relax
+        % failed to split
+        \ifdim\dimexpr\lb@freevspace + #1\relax<\textheight\relax % test if we were at a fresh page.. (and prevent infinite recursion)
+          \lb@debug{failed to split the box, inserting a page break}%
+          \hrule \@height\z@ \@width\hsize
+          \lb@eject%
+          \lb@typeset[\textheight]% try again, but pass \textheight to guard against infinite recursion
+        \else
+          % on a fresh page we should not fail anymore.. just output as is..
+          % lb@warncannotsplit
+          \lb@single@{\lb@mainbox}%
+        \fi
+      \else
+        % first part success
+        \lb@typeout{first part splitted}%
+        \lb@first@{\lb@headbox}%
+        \expandafter\expandafter\expandafter\lb@typesetrest
+      \fi
+    \fi
+  }{%\else
+    \lb@debug{unbreakable box}%
+    \lb@single@{\lb@mainbox}% always directly output an unbreakable box
+  }%
+}
+
+\newcommand\lb@typesetrest{%
+  \lb@setfreevspace%
+  \setlength\lb@neededvspace{\dimexpr\ht\lb@mainbox+\dp\lb@mainbox+\lb@skipbottom+\lb@skipbreaktop\relax}%
+  \ifdim\lb@neededvspace<\lb@freevspace\relax
+    \lb@typeout{output last part of box}%
+    \lb@last@{\lb@mainbox}%
+  \else
+    \lb@debug{split box further}%
+    \setlength\lb@splitheight{\dimexpr\lb@freevspace-\lb@skipbreaktop-\lb@skipbreakbottom\relax}%
+    \lb@splitbox
+    \ifdim\ht\lb@headbox=0pt\relax
+      % failed to split
+      \lb@typeout{failed to split box!}%
+      \lb@last@{\lb@mainbox}%
+    \else
+      % middle part success
+      \lb@typeout{output middle part of box}%
+      \lb@middle@{\lb@headbox}%
+      \expandafter\expandafter\expandafter\lb@typesetrest% continue the iteration...
+    \fi
+  \fi
+}
+
+% --------------------------------------------------------
+% Split a long vbox over multiple pages.
+% This code is based on similar code in the mdframed package
+% --------------------------------------------------------
+
+\newlength\lb@splitheight
+\newlength\lb@insurance     % tiny extra space to ensure our box will really fit
+\setlength\lb@insurance{1pt}
+
+% expects split target height in lb@splitheight, and splits off the start of lb@mainbox to lb@headbox
+\newcommand\lb@splitbox{%
+  \ifdim\dimexpr\ht\lb@mainbox + \dp\lb@mainbox\relax>\lb@splitheight\relax
+    % the main box is larger than our target split height..
+    \ifdim\lb@extrasplit>\lb@splitheight\relax
+      % not enough space to bother
+      \lb@typeout{not enough space on page for a split}%
+      \setbox\lb@headbox=\vbox{}% empty head
+    \else
+      % try a split; lower the split height a bit so we are sure to fit
+      \advance\lb@splitheight -\lb@insurance\relax
+      \lb@debug{split: \the\lb@splitheight, from \the\dimexpr\ht\lb@mainbox + \dp\lb@mainbox\relax}%
+      \setbox\lb@savebox=\vbox{\unvcopy\lb@mainbox}% save original
+      \lb@trysplit{\lb@splitheight}%
+      \ifdim\dimexpr\ht\lb@headbox + \dp\lb@headbox>\lb@splitheight\relax
+        % too big, bad split. Try other splits.. iterate N times with 1 or 5pt less before giving up
+        \dimen@=\lb@splitheight\relax
+        \@tempcnta=\z@\relax
+        \loop
+        \ifdim\dimexpr\ht\lb@headbox+\dp\lb@headbox\relax>\lb@splitheight\relax
+          \ifnum\@tempcnta<50%
+            \advance\dimen@ by -\p@\relax% try a slightly smaller height..
+          \else
+            \advance\dimen@ by -5\p@\relax% try larger increase after 50pt..
+          \fi
+          \advance\@tempcnta by \@ne\relax
+          \lb@ignorevbadness
+          \setbox\lb@mainbox=\vbox{\unvcopy\lb@savebox}% restore
+          \lb@trysplit{\dimen@}%
+          \ifdim\lb@extrasplit<\dimen@\relax\else\lb@splitstop\fi % don't try to split too small
+          \ifnum\@tempcnta<100\relax\else\lb@splitstop\fi % and not more than N attempts
+        \repeat%
+        \ifnum\@tempcnta<100\relax
+          \dimen@=\dimexpr\lb@splitheight - \ht\lb@headbox - \dp\lb@headbox\relax
+          \ifdim\dimen@>\option{/longbox/split-badness}\relax
+            \lb@warnbadsplit{\dimen@}%
+          \fi
+        \fi
+      \fi
+    \fi
+  \else
+    % mainbox fits in our target lb@splitheight
+    \setbox\lb@headbox=\vbox{\unvbox\lb@mainbox}%    
+    \setbox\lb@mainbox=\vbox{}%
+  \fi
+}
+
+\newcommand\lb@splitstop{%
+  \lb@typeout{cannot find a good split}%
+  \let\iterate\relax
+  \lb@warncannotsplit
+  \setbox\lb@mainbox=\vbox{\unvcopy\lb@savebox}% restore      
+  \setbox\lb@headbox=\vbox{}% empty head 
+  \@tempcnta=\@M\relax   
+}
+
+\newcommand\lb@trysplit[1]{% try to split at given height
+  \lb@typeout{try to split at: \the\dimexpr #1\relax}%
+  \lb@ignorevbadness  
+  \setbox\lb@headbox=\vsplit\lb@mainbox to #1\relax%
+  \setbox\lb@headbox=\vbox{\unvbox\lb@headbox}%
+  \setbox\lb@mainbox=\vbox{\unvbox\lb@mainbox}%  
+}
+
+% --------------------------------------------------------
+% The longbox environment uses options to set its options
+% --------------------------------------------------------
+
+
+% keys and styles that can be set once globally
+\options{%
+  /longbox/.new family,
+}%
+
+\options{/longbox,%
+  % computed
+  @part-needtop/.new toggle,
+  @part-needbottom/.new toggle,
+  @part-height/.new length,
+  @part-width/.new length,
+  @part-depth/.new length,
+  @content-box-height/.new length,
+  @content-box-width/.new length,
+  @content-box-depth/.new length,
+  @breakat-previous/.new length,
+  @lower/.new length,
+  %
+  debug/.new toggle,
+  verbose/.new toggle,
+  render/.new value         =\lb@render@fbox,
+  adjust-options/.new value = {\longbox@adjustoptions},
+  eject/.new value          = {\protect\vfill\protect\eject},
+  use-vbox/.new toggle      = true,
+  split-minimum/.new length = {1.5\baselineskip},
+  split-badness/.new length = \baselineskip,
+  %
+  height-align/.new choice= {top,middle,bottom},
+  baseline/.new choice    = {bottom,middle,top},
+  text-align/.new choice  = {default,left,center,right,justify},
+  vertical-align/.new choice  = {baseline,bottom,middle,top,text-bottom,text-top,super,sub},
+  raise/.new length       = {0pt},
+  baseline-skip/.new toggle =true,  
+  % 
+  height/.new length      = -1sp,
+  width/.new length       = -1sp,
+  outer-height/.new length= -1sp,
+  outer-width/.new length = -1sp,
+  insert-before/.new value= {},
+  insert-after/.new value = {},
+  breakat/.new value      = {},
+  breakable/.new toggle   = false,
+  skip/.new style         = {skip-top=#1,skip-right=#1,skip-bottom=#1,skip-left=#1},
+  skip-top/.new length,
+  skip-right/.new length,
+  skip-bottom/.new length,
+  skip-left/.new length,
+  skip-break-bottom/.new length,
+  skip-break-top/.new length,
+}
+
+\newcommand\longbox@adjustoptions{%
+  %\typeout{  standard longbox adjustoptions}%
+  \lb@debug{    current width=\the\dimexpr\option{/longbox/width}, outer=\the\dimexpr\option{/longbox/outer-width}, linewidth=\the\linewidth}%
+  \ontoggle{/longbox/debug}{\option@invoke{/longbox/verbose}{true}}%
+  % adjust height
+  \ifdim\option{/longbox/height}=-1sp\relax
+    \ifdim\option{/longbox/outer-height}=-1sp\else
+      \option@invoke{/longbox/height}%
+        {\option{/longbox/outer-height}-\option{/longbox/skip-top}-\option{/longbox/skip-bottom}}%
+    \fi
+  \fi
+  % set width 
+  \ifdim\option{/longbox/width}=-1sp\relax
+    \ifdim\option{/longbox/outer-width}=-1sp\relax
+      \option@invoke{/longbox/outer-width}{\linewidth}%
+    \fi
+    \dimen@=\dimexpr\option{/longbox/outer-width}-\option{/longbox/skip-left}-\option{/longbox/skip-right}\relax
+    \ifdim\dimen@<\z@\relax\dimen@=\z@\fi
+    \option@invoke{/longbox/width}{\dimen@}%
+  \fi  
+  % use a breakbox whenever we are in external vertical mode and not width or height restricted.
+  \iftoggle{/longbox/use-vbox}{}{%
+    \ifinner\toggletrue{/longbox/use-vbox}\else
+      \ifhmode\toggletrue{/longbox/use-vbox}\else
+        \ifdim\option{/longbox/height}>-1sp\toggletrue{/longbox/use-vbox}\else
+          \iftoggle{/longbox/breakable}{}{\toggletrue{/longbox/use-vbox}}%
+          \ifoptionblank{/longbox/breakat}{}{\toggletrue{/longbox/use-vbox}}%
+    \fi\fi\fi
+  }%
+}
+
+\newenvironment{longbox}[1][]{%
+  %\bb@savekeys{bfbox}{fboxrule=\the\fboxrule,fboxsep=\the\fboxsep,bgcolor={\bb@bgcolor},rulecolor={\bb@rulecolor},stickout={\bb@stickout}}%
+  \begin{longbox@env}{/longbox}{#1}%
+}{\end{longbox@env}}
+
+\newcommand\lbox[1][]{%
+  %\bb@savekeys{bfbox}{fboxrule=\the\fboxrule,fboxsep=\the\fboxsep,bgcolor={\bb@bgcolor},rulecolor={\bb@rulecolor},stickout={\bb@stickout}}%
+  \longbox@cmd{/longbox}{#1}%
+}
+
+\newcommand*\lb@render@fbox{%
+  %\typeout{render defaultbox: bgcolor=\bb@bgcolor, needtop=\iftoggle{/longbox/@part-needtop}{true}{false}}%
+  \@ovdx=\dimexpr\option{/longbox/@part-width} - 2\fboxrule\relax%
+  \@ovdy=\dimexpr\option{/longbox/@part-height}\relax%
+  \iftoggle{/longbox/@part-needbottom}%
+    {\@tempdima=0pt\relax\advance\@ovdy by -\fboxrule}%
+    {\@tempdima=\dimexpr\fboxrule + \bb@stickout\relax
+     \advance\bb@height by \@tempdima
+     \advance\@ovdy by \@tempdima}%
+  \iftoggle{/longbox/@part-needtop}%
+    {\@tempdimb=0pt\relax\advance\@ovdy by -\fboxrule}%
+    {\@tempdimb=\dimexpr\bb@stickout\relax
+     \advance\bb@height by \@tempdimb
+     \advance\@ovdy by \@tempdimb}%
+  %
+  \hbox{\lower \@tempdima\vbox{%
+    \vskip -\@tempdimb
+    \ontoggle{/longbox/@part-needtop}{\lb@debug{toprule wd=\expandafter\the\option{/longbox/width}}\hrule width \option{/longbox/@part-width} height \fboxrule}%
+    \hbox{%
+      \vrule width \fboxrule height \@ovdy%
+      \ifx\bb@bgcolor\@empty
+        \vrule width \@ovdx height \z@\relax
+      \else
+        {\color{\bb@bgcolor}\vrule width \@ovdx height \@ovdy}%
+      \fi
+      \vrule width \fboxrule height \@ovdy%
+    }%
+    \ontoggle{/longbox/@part-needbottom}{\hrule width \option{/longbox/@part-width} height \fboxrule}%
+  }}%
+}
\ No newline at end of file
diff --git a/Master/texmf-dist/tex/latex/longfbox/longfbox.sty b/Master/texmf-dist/tex/latex/longfbox/longfbox.sty
new file mode 100644
index 00000000000..9627964199d
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/longfbox/longfbox.sty
@@ -0,0 +1,1344 @@
+%---------------------------------------------------------------------------
+%  Copyright 2015 Daan Leijen, Microsoft Corporation.
+%
+%  This work may be distributed and/or modified under the
+%  conditions of the LaTeX Project Public License, either version 1.3
+%  of this license or (at your option) any later version.
+%  The latest version of this license is in
+%    http://www.latex-project.org/lppl.txt
+%  and version 1.3 or later is part of all distributions of LaTeX
+%  version 2005/12/01 or later.  
+%---------------------------------------------------------------------------
+\NeedsTeXFormat{LaTeX2e}[1995/12/01]
+
+\ProvidesPackage{longfbox}[2015/12/01, Daan Leijen, Provides long fbox that can break over pages]
+
+\RequirePackage{options}
+\RequirePackage{longbox}
+\RequirePackage{pict2e}
+\RequirePackage{ellipse}
+
+% --------------------------------------------------------
+% Dimension calulations
+% --------------------------------------------------------
+
+% dimmin/dimmax return minimum or maximum dimension
+\providecommand\dim@min[2]{\ifdim#1>#2#2\else #1\fi}
+\providecommand\dim@max[2]{\ifdim#1>#2#1\else #2\fi}
+
+\newcommand*\option@dimmin[2]{\dim@min{\option{#1}}{\option{#2}}}
+\newcommand*\option@dimmax[2]{\dim@max{\option{#1}}{\option{#2}}}
+
+
+% --------------------------------------------------------
+% Add a new 'sides' option type
+% --------------------------------------------------------
+
+\options{
+  /handlers/new sides/.new handler = []{
+    \ifblank{#2}%
+      {\option@def{#1/@cmd@sides}##1##2##3##4{\optionsalso{#1-top={##1}, #1-right={##2}, #1-bottom={##3}, #1-left={##4}}}}%
+      {\option@def{#1/@cmd@sides}##1##2##3##4{\optionsalso{#2}}}%
+    \optionsalso{
+      #1/.new cmdx = {##1,##2,##3,##4,##5\relax}{,,,,\relax}{%
+        \ifblank{##2##3##4}{\option{#1/@cmd@sides}{##1}{##1}{##1}{##1}}%
+          {\ifblank{##3##4}{\option{#1/@cmd@sides}{##1}{##2}{##1}{##2}}%
+            {\ifblank{##4}{\option{#1/@cmd@sides}{##1}{##2}{##3}{##2}}%
+              {\option{#1/@cmd@sides}{##1}{##2}{##3}{##4}}%
+            }%
+          }%
+      },
+      #1/.type = sides,
+    }%
+  },%
+}
+
+\newcommand*\optionlengthlimit[3]{% len, min, max
+  \letoption{#1}\opt@temp
+  \ifdim\opt@temp<\dimexpr#2\relax
+    \option@invoke{#1}{#2}%
+  \else\ifdim\opt@temp>\dimexpr#3\relax
+    \option@invoke{#1}{#3}%
+  \fi\fi
+}
+
+\newcommand*\optionradiuslimit[4]{% r1, r2, min, max
+  \letoption{#1}\opt@tempa
+  \letoption{#2}\opt@tempb
+  \ifdim\opt@tempa<\dimexpr#3\relax\option@invoke{#1}{#3}\fi
+  \ifdim\opt@tempb<\dimexpr#3\relax\option@invoke{#2}{#3}\fi
+  \ifdim\dimexpr\opt@tempa + \opt@tempb\relax=\z@\relax\else
+    \ifdim\dimexpr\opt@tempa+\opt@tempb\relax>\dimexpr#4\relax
+      \edef\opt@perc{\the\numexpr(\number\dimexpr#4\relax)/%
+                        (\number\dimexpr(\opt@tempa+\opt@tempb)/100\relax)}%
+      %\typeout{scale:\the\opt@tempa,\the\opt@tempb, by \opt@perc percent to make \the\dimexpr#4\relax}%
+      \edef\opt@temp{\dimexpr\opt@perc\dimexpr\the\opt@tempa\relax / 100\relax}%
+      \option@einvoke{#1}{\opt@temp}%
+      \option@einvoke{#2}{\dimexpr#4 - \opt@temp\relax}%
+      %\typeout{ scaled to: \the\opt@temp,\the\dimexpr#4 - \opt@temp\relax}%
+    \fi
+  \fi
+}
+
+
+% \begin{macro}{\trig@atantan}
+% \marg{a}\marg{b}\marg{$\alpha$}{dimen$_\mathit{reg}$}\\
+% Assigns $\atan_2(\frac{\sin(\alpha)}{b},\frac{\cos(\alpha)}{a})$ to dimension register \textit{dimen$_\mathit{reg}$},
+% where $a$ and $b$ are dimensions.
+% Returns $\alpha$ when $a = b$, or when $a=0$ or $b=0$.
+%    \begin{macrocode}
+\newcommand*\trig@atantan[4]{%
+  %\typeout{ atantan:(\the#1,\the#2,\the#3, #4)}%
+  \@tempdima\dimexpr#1\relax
+  \@tempdimb\dimexpr#2\relax  
+%    \end{macrocode}
+% If $a = b$, we have a circle and the result is $\alpha$.
+%    \begin{macrocode}  
+  \ifdim\@tempdima=\@tempdimb
+    #4\dimexpr#3\relax
+  \else\ifdim\@tempdima=\z@
+    #4\dimexpr#3\relax
+  \else\ifdim\@tempdimb=\z@
+    #4\dimexpr#3\relax
+  \else
+    \edef\trig@temp{\strip@pt\dimexpr#3\relax}%
+    \CalculateSin{\trig@temp}\CalculateCos{\trig@temp}%
+    \@tempdimc\dimexpr1\p@ * \dimexpr\UseSin{\trig@temp}\p@\relax/\@tempdimb\relax
+    \@tempdimd\dimexpr1\p@ * \dimexpr\UseCos{\trig@temp}\p@\relax/\@tempdima\relax
+    \pIIe@atantwo{\@tempdimc}{\@tempdimd}\dimen@
+    \ifdim\dimen@<\z@
+      \ifdim\dimexpr#3\relax<\z@\else\advance\dimen@360\p@\fi
+    \fi
+    \@tempdima\dimexpr#3 - \dimen@\relax
+    \ifdim\@tempdima<\z@\@tempdima-\@tempdima\fi
+    \ifdim\@tempdima<360\p@\else\advance\dimen@360\p@\fi
+    %\typeout{atan: \the\dimexpr#3\relax versus. \the\dimen@ }%
+    #4\dimen@
+  \fi\fi\fi
+}
+%    \end{macrocode}
+% \end{macro}
+
+% rough approximation of the perimeter; 
+% if |radius-x == radius-y| = 0 (a circle), the approximation is precise. 
+% otherwise, works best when |angle2-angle1| <= 45 and gets worse from there on.
+\newcommand*\ellip@letarcperimeter[5]{% 'radius-x', 'radius-y', 'angle-1', 'angle-2', '\result'
+  \@tempdima\dimexpr#3\relax
+  \@tempdimb\dimexpr#4\relax
+  \@tempdimc\dimexpr\@tempdima - \@tempdimb\relax
+  \ifdim\@tempdimc<\z@\@tempdimc-\@tempdimc\fi
+  \ifdim#1=#2\relax% circle?
+    \edef\@tempa{\strip@pt\@tempdimc}% angle difference delta as factor
+    \dimen@\@tempa\dimexpr#1\relax% r*delta
+    \dimen@0.017453\dimen@% (2*pi/360) * r * delta = 2*pi*r * (delta/360)
+  \else% ellipse: take the distance between the points on the ellipse, works pretty good if delta <= 45, and ok'ish for delta <= 90
+    \@ovro\dimexpr#1\relax
+    \@ovri\dimexpr#2\relax
+    \edef\fbox@tempa{\strip@pt\@tempdima}%
+    \edef\fbox@tempb{\strip@pt\@tempdimb}%
+    \pIIe@ellip@sincost{\fbox@tempa}{\fbox@tempb}%
+    \@tempdima\@ellipcosone\@ovro
+    \@tempdimb\@ellipsinone\@ovri
+    \@tempdimc\@ellipcostwo\@ovro
+    \@tempdimd\@ellipsintwo\@ovri
+    \advance\@tempdimc by -\@tempdima%
+    \advance\@tempdimd by -\@tempdimb%
+    \pIIe@ellip@csqrt{\@tempdimc}{\@tempdimd}{\dimen@}%
+    %\typeout{ distance: \the\dimen@, from (x,y)=(\the\@tempdimc,\the\@tempdimd), radii=(\the#1,\the#2), angles=(\the#3,\the#4)}%
+  \fi
+  \edef#5{\the\dimen@}%
+}
+
+
+% ------------------------------------------------------------------------------
+% Borders using the picture environment
+% ------------------------------------------------------------------------------
+
+\newcommand*\fbox@border@pict{%
+  \ifnum\option{/fbox/render/@ord}=2\relax%
+    \begingroup
+    \hbox{%
+      \unitlength\p@
+      \begin{picture}(0,0)(0,\optionunit{/fbox/@border-box-height})% bottom-left is origin
+        % markers
+        \ontoggle{/fbox/show-markers}{%
+          \linethickness{\option{/fbox/marker-width}}%
+          \optioncolor{/fbox/marker-color}%
+          \fbox@rect{0pt}{0pt}{\option{/fbox/@border-box-width}}{\option{/fbox/@border-box-height}}%
+          \fbox@rect{\option{/fbox/border-left-width}}{\option{/fbox/border-\fbox@bottom-width}}%
+                      {\option{/fbox/@border-box-width}-\option{/fbox/border-right-width}}%
+                      {\option{/fbox/@border-box-height}-\option{/fbox/border-\fbox@top-width}}%S                                    
+        }%
+        %compute corner coordinates
+        \fbox@border@calccorners 
+        %put down the background color
+        \fbox@border@colorbackground
+        \option{/fbox/picture-insert-before}%
+        %put down the sides
+        \fbox@border@side{3}{-2}{0}%top
+        \fbox@border@side{5}{-4}{3}%left
+        \fbox@border@side{-6}{7}{2}%bottom
+        \fbox@border@side{-8}{1}{1}%right
+      \end{picture}%
+    }%
+    \endgroup
+  \fi
+}
+
+\newcommand*\fbox@border@pict@after{%
+  \ifnum\option{/fbox/render/@ord}=2\relax%
+    \letoption{/fbox/picture-insert-after}\fbox@insertafter
+    \eifblank{\fbox@insertafter}{}{%
+      \begingroup
+      \hbox{%
+        \begin{picture}(0,0)(0,0)% bottom-left is origin
+           \fbox@insertafter
+        \end{picture}%
+      }%
+      \endgroup
+    }% 
+  \fi
+}
+
+\newcommand*\fbox@border@side[3]{%
+  \fbox@setoct@angles{#1}%
+  \edef\fbox@style{\option{/fbox/border-\fbox@side-style}}%
+  \optioncolor{/fbox/border-\fbox@side-color}%
+  \option{/fbox/picture-side-insert-before}%
+  \ifcsdef{fbox@border@pict@\fbox@style}%
+    {\csuse{fbox@border@pict@\fbox@style}{#1}{#2}{#3}}%
+    {\PackageWarning{longfbox}{Unknown style "\fbox@style". Using "solid" instead.}%
+     \fbox@border@pict@solid{#1}{#2}{#3}}%
+  \option{/fbox/picture-side-insert-after}%       
+}
+
+% ------------------------------------------------------------------------------
+% Define standard border styles for the picture environment
+%
+% a style has the form \fbox@border@pict@<style>{<octant1>}{<octant2>}{<side no>} 
+% where <side> is the border side no: top=0, right=1, bottom=2, left=3
+
+
+\newcommand*\fbox@border@pict@none[3]{%
+  % do nothing
+}
+\newcommand*\fbox@border@pict@hidden[3]{%
+  % do nothing
+}
+
+% --------------------------------------------------------
+% Background color
+% --------------------------------------------------------
+
+% Lay down background color
+\newcommand*\fbox@border@colorbackground{%
+ \ifcase\option{/fbox/background-clip/@ord}\relax
+    \fbox@border@colorbackground@border
+    \edefoption{/fbox/background-border-color}\@tempa
+    \edefoption{/fbox/background-padding-color}\@tempb
+    \ifx\@tempa\@tempb\relax\else
+      \fbox@border@colorbackground@padding
+    \fi
+  \or
+    \fbox@border@colorbackground@padding
+  \or 
+    \fbox@border@colorbackground@content
+  \fi
+}
+
+\newcommand*\fbox@border@colorbackground@padding{%
+  \ifoptionblank{/fbox/background-padding-color}{}{%
+    \optioncolor{/fbox/background-padding-color}%
+    \moveto(\optionunit{/fbox/@border-bottom-left-ix},\optionunit{/fbox/border-\fbox@bottom-width})%
+    \fbox@cornerarc{bottom-left}{i}{270}{180}%
+    \fbox@cornerarc{top-left}{i}{180}{90}%
+    \fbox@cornerarc{top-right}{i}{90}{0}%
+    \fbox@cornerarc{bottom-right}{i}{0}{-90}%
+    \closepath
+    \fillpath
+    \edefoption{/fbox/background-padding-color}\@tempa
+    \edefoption{/fbox/background-color}\@tempb
+    \ifx\@tempa\@tempb\relax\else
+      \fbox@border@colorbackground@content
+    \fi
+  }%
+}
+
+\newcommand*\fbox@border@colorbackground@content{%
+  \ifoptionblank{/fbox/background-color}{}{%
+    \optioncolor{/fbox/background-color}%
+    \@ovxx=\dimexpr\option{/fbox/border-left-width} + \option{/fbox/padding-left}\relax
+    \@ovyy=\dimexpr\option{/fbox/border-\fbox@bottom-width} + \option{/fbox/padding-\fbox@bottom}\relax
+    \fbox@rect*{\@ovxx}{\@ovyy}%
+               {\@ovxx + \option{/fbox/@content-box-width}}%
+               {\@ovyy + \option{/fbox/@content-box-height}}%
+  }%
+}
+
+\newcommand*\fbox@border@colorbackground@border{%
+  \ifoptionblank{/fbox/background-border-color}{}{%
+    \optioncolor{/fbox/background-border-color}%
+    \moveto(0,0)%
+    \fbox@cornerarc{bottom-left}{}{270}{180}%
+    \fbox@cornerarc{top-left}{}{180}{90}%
+    \fbox@cornerarc{top-right}{}{90}{0}%
+    \fbox@cornerarc{bottom-right}{}{0}{-90}%
+    \closepath
+    \fillpath
+  }%
+}
+
+\newcommand*\fbox@cornerarc[4]{% {'top-left'}{'i'?}{'start angle'}{'end angle'}
+  \elliparc{\optionunit{/fbox/@border-#1-#2x}}%
+            {\optionunit{/fbox/@border-#1-#2y}}%
+            {\optionunit{/fbox/@border-#1-#2radius-x}}%
+            {\optionunit{/fbox/@border-#1-#2radius-y}}{#3}{#4}%
+}
+
+
+
+% --------------------------------------------------------
+% Compute corner coordinates
+% --------------------------------------------------------
+
+% Calculate all corner coordinates
+\newcommand*\fbox@border@calccorners{% 
+  \fbox@border@calccorner{top}{left}{\fbox@top}%
+  \fbox@border@calccorner{top}{right}{\fbox@top}%
+  \fbox@border@calccorner{bottom}{left}{\fbox@bottom}%
+  \fbox@border@calccorner{bottom}{right}{\fbox@bottom}%
+}
+
+% calculate for each corner
+% the /fbox/@border-#1-#2-
+% -iradius-x/y: inner corner radius
+% -ix/iy: inner corner center point
+\newcommand*\fbox@border@calccorner[3]{% {'top'}{'left'}{'break-top'}
+  \option@invoke{/fbox/@border-#1-#2-iradius-x}{\dimexpr0pt\relax}%  
+  \option@invoke{/fbox/@border-#1-#2-iradius-y}{\dimexpr0pt\relax}%  
+  % only give positive inner radius if the center lays outside the border
+  \ifdim\dimexpr\option{/fbox/@border-#1-#2-radius-x} - \option{/fbox/border-#2-width}\relax>0pt\relax
+   \ifdim\dimexpr\option{/fbox/@border-#1-#2-radius-y} - \option{/fbox/border-#3-width}\relax>0pt\relax
+     \option@invoke{/fbox/@border-#1-#2-iradius-x}%
+      {\option{/fbox/@border-#1-#2-radius-x} - \option{/fbox/border-#2-width}}%
+     \option@invoke{/fbox/@border-#1-#2-iradius-y}%
+      {\option{/fbox/@border-#1-#2-radius-y} - \option{/fbox/border-#3-width}}%
+    \fi
+  \fi
+  % assign inner (ix,iy) and outer (x,y)
+  \option@invoke{/fbox/@border-#1-#2-ix}{\option{/fbox/border-#2-width} + \option{/fbox/@border-#1-#2-iradius-x}}%
+  \option@invoke{/fbox/@border-#1-#2-iy}{\option{/fbox/border-#3-width} + \option{/fbox/@border-#1-#2-iradius-y}}%
+  \ifstrequal{#2}{left}{}{%
+    \option@invoke{/fbox/@border-#1-#2-ix}{\option{/fbox/@border-box-width} - \option{/fbox/@border-#1-#2-ix}}%
+  }%
+  \ifstrequal{#1}{bottom}{}{%
+    \option@invoke{/fbox/@border-#1-#2-iy}{\option{/fbox/@border-box-height} - \option{/fbox/@border-#1-#2-iy}}%
+  }%
+  % assign dividing angle based on the width ratio 90 * (b / (a+b))
+  \ifdim\option{/fbox/border-#3-width}=\z@\relax
+    \@tempdima=90pt\relax
+  \else
+    \@tempdima90\dimexpr1pt * \option{/fbox/border-#2-width}/(\option{/fbox/border-#3-width} + \option{/fbox/border-#2-width})\relax
+  \fi
+  %\trig@atantwo{\option{/fbox/border-#2-width}}{\option{/fbox/border-#1-width}}\@tempdima
+  \ifstrequal{#2}{left}{\@tempdima\dimexpr180\p@-\@tempdima\relax}{}%
+  \ifstrequal{#1}{bottom}{\@tempdima\dimexpr360\p@-\@tempdima\relax}{}%
+  \option@invoke{/fbox/@border-#1-#2-phi}{\@tempdima}%
+  %\typeout{ corner angle #1-#2: \the\option{/fbox/@border-#1-#2-phi}}%
+}
+
+% --------------------------------------------------------
+% Helper coordinates
+% There are all just definitions of 'dimexpr's
+% --------------------------------------------------------
+
+\options{
+  /fbox/@border-top-left-x/.new dim     = \option{/fbox/@border-top-left-radius-x},
+  /fbox/@border-top-left-y/.new dim     = \option{/fbox/@border-box-height} - \option{/fbox/@border-top-left-radius-y},
+  /fbox/@border-top-right-x/.new dim    = \option{/fbox/@border-box-width} - \option{/fbox/@border-top-right-radius-x},
+  /fbox/@border-top-right-y/.new dim    = \option{/fbox/@border-box-height} - \option{/fbox/@border-top-right-radius-y},
+  /fbox/@border-bottom-left-x/.new dim  = \option{/fbox/@border-bottom-left-radius-x},
+  /fbox/@border-bottom-left-y/.new dim  = \option{/fbox/@border-bottom-left-radius-y},
+  /fbox/@border-bottom-right-x/.new dim = \option{/fbox/@border-box-width} - \option{/fbox/@border-bottom-right-radius-x},
+  /fbox/@border-bottom-right-y/.new dim = \option{/fbox/@border-bottom-right-radius-y},
+  % the following ones are only used for sharp corner filling; perhaps we can optimize this better?
+  /fbox/@border-top-y/.new dim          = \option{/fbox/@border-box-height},
+  /fbox/@border-top-iy/.new dim         = \option{/fbox/@border-box-height} - \option{/fbox/border-\fbox@top-width},
+  /fbox/@border-bottom-y/.new dim       = 0pt,
+  /fbox/@border-bottom-iy/.new dim      = \option{/fbox/border-\fbox@bottom-width},
+  /fbox/@border-right-x/.new dim        = \option{/fbox/@border-box-width},
+  /fbox/@border-right-ix/.new dim       = \option{/fbox/@border-box-width} - \option{/fbox/border-right-width},
+  /fbox/@border-left-x/.new dim         = 0pt,
+  /fbox/@border-left-ix/.new dim        = \option{/fbox/border-left-width},
+  /fbox/@border-top-left-ox/.new dim    = \option@dimmax{/fbox/@border-top-left-x}{/fbox/@border-top-left-ix},
+  /fbox/@border-top-left-oy/.new dim    = \option@dimmin{/fbox/@border-top-left-y}{/fbox/@border-top-left-iy},
+  /fbox/@border-top-right-ox/.new dim   = \option@dimmin{/fbox/@border-top-right-x}{/fbox/@border-top-right-ix},
+  /fbox/@border-top-right-oy/.new dim   = \option@dimmin{/fbox/@border-top-right-y}{/fbox/@border-top-right-iy},
+  /fbox/@border-bottom-left-ox/.new dim = \option@dimmax{/fbox/@border-bottom-left-x}{/fbox/@border-bottom-left-ix},
+  /fbox/@border-bottom-left-oy/.new dim = \option@dimmax{/fbox/@border-bottom-left-y}{/fbox/@border-bottom-left-iy},
+  /fbox/@border-bottom-right-ox/.new dim= \option@dimmin{/fbox/@border-bottom-right-x}{/fbox/@border-bottom-right-ix},
+  /fbox/@border-bottom-right-oy/.new dim= \option@dimmax{/fbox/@border-bottom-right-y}{/fbox/@border-bottom-right-iy},
+}
+
+
+% --------------------------------------------------------
+% setoct: Set various macros based on the octant
+% --------------------------------------------------------
+
+
+\newcount\fbox@oct
+\newcount\fbox@quad
+\newcount\fbox@diaq
+\newcount\fbox@sign
+
+%fbox@corner
+\newcommand*\fbox@setoct[2][]{% [i (inner)]{octant}}
+  \fbox@sign1\relax
+  \fbox@oct#2\relax
+  \ifnum\fbox@oct<\z@\fbox@oct-\fbox@oct\fbox@sign-\fbox@sign\fi
+  \fbox@quad\fbox@oct
+  \advance\fbox@quad by 1\relax
+  \divide\fbox@quad by 2\relax% quadrant 1-4
+  \ifcase\fbox@quad\relax%\@tempa\relax
+  \or\def\fbox@corner{top-right}%
+  \or\def\fbox@corner{top-left}%
+  \or\def\fbox@corner{bottom-left}%
+  \or\def\fbox@corner{bottom-right}%
+  \fi
+  \letcs\fbox@adjustx{fbox@adjustx@\fbox@corner}%
+  \letcs\fbox@adjusty{fbox@adjusty@\fbox@corner}%
+  \fbox@diaq\fbox@oct
+  \divide\fbox@diaq by 2\relax% 'diamond quadrant' 0 -4
+  \ifodd\fbox@diaq\toggletrue{/fbox/@side-horizontal}\def\fbox@axis{x}\else\togglefalse{/fbox/@side-horizontal}\def\fbox@axis{y}\fi
+  \ifcase\fbox@diaq\relax
+     \def\fbox@side{right}%
+  \or\iftoggle{/longbox/@part-needtop}{\def\fbox@side{top}}{\def\fbox@side{break-top}}%
+  \or\def\fbox@side{left}%
+  \or\iftoggle{/longbox/@part-needbottom}{\def\fbox@side{bottom}}{\def\fbox@side{break-bottom}}%
+  \or\def\fbox@side{right}%
+  \fi
+  \option@invoke{/fbox/@side}{\fbox@side}%
+  %\typeout{setoct(#1,#2): \fbox@corner: \iftoggle{/fbox/@side-horizontal}{hor}{ver} diaq=\the\fbox@diaq, quad=\the\fbox@quad, oct=\the\fbox@oct, direction=\the\fbox@sign}%
+}
+
+\newcommand*\fbox@setotherside{%
+  \ifcase\fbox@diaq\relax
+     \def\fbox@otherside{top}%
+  \or\ifodd\fbox@oct\relax\def\fbox@otherside{left}\else\def\fbox@otherside{right}\fi%
+  \or\ifodd\fbox@oct\relax\def\fbox@otherside{bottom}\else\def\fbox@otherside{top}\fi
+  \or\ifodd\fbox@oct\relax\def\fbox@otherside{right}\else\def\fbox@otherside{left}\fi
+  \or\def\fbox@otherside{bottom}%
+  \fi
+}
+
+\csdef{fbox@adjustx@top-right}#1{\dimexpr\option{/fbox/@border-box-width} - #1\relax}%
+\csdef{fbox@adjusty@top-right}#1{\dimexpr\option{/fbox/@border-box-height} - #1\relax}%
+
+\csdef{fbox@adjustx@top-left}#1{#1}%
+\csdef{fbox@adjusty@top-left}#1{\dimexpr\option{/fbox/@border-box-height} - #1\relax}%
+
+\csdef{fbox@adjustx@bottom-left}#1{#1}%
+\csdef{fbox@adjusty@bottom-left}#1{#1}%
+
+\csdef{fbox@adjustx@bottom-right}#1{\dimexpr\option{/fbox/@border-box-width} - #1\relax}%
+\csdef{fbox@adjusty@bottom-right}#1{#1}%
+
+
+\newlength\fbox@anglestart
+\newlength\fbox@angleend
+\newcommand*\fbox@setoct@angles[2][]{%
+  \fbox@setoct[#1]{#2}%
+  \fbox@anglestart\dimexpr90\p@ * \fbox@diaq\relax
+  \fbox@angleend\option{/fbox/@border-\fbox@corner-phi}%  
+  \ifnum\fbox@sign<\z@
+    \ifodd\fbox@oct\relax\else
+      \@tempdima\fbox@anglestart
+      \fbox@anglestart\fbox@angleend
+      \fbox@angleend\@tempdima
+    \fi
+  \else
+    \ifodd\fbox@oct\relax
+      \@tempdima\fbox@anglestart
+      \fbox@anglestart\fbox@angleend
+      \fbox@angleend\@tempdima
+    \fi
+  \fi
+  %\typeout{ angles=\the\fbox@anglestart, to \the\fbox@angleend}%  
+}
+
+
+% --------------------------------------------------------
+% Solid border 
+% --------------------------------------------------------
+
+\newcommand*\fbox@border@pict@solid[3]{% octant1, octant2, side no.
+  %\fbox@setoct@angles[]{#1}%
+  %\optioncolor{/fbox/border-\fbox@side-color}%
+  \fbox@border@hcornerarc[1]{}{#1}%
+  \fbox@setoct@angles{-#2}%  
+  \fbox@border@hcornerarc{}{-#2}%
+  \fbox@setoct@angles[i]{#2}%  
+  \fbox@border@hcornerarc{i}{#2}%
+  \fbox@setoct@angles[i]{-#1}%
+  \fbox@border@hcornerarc{i}{-#1}%
+  \closepath
+  \fillpath
+}
+
+% a half corner arc; assumes zero radius will just draw a line to the center point
+\newcommand*\fbox@border@hcornerarc[3][0]{% [lmn], i(nner), octant
+  \elliparc[#1]{\optionunit{/fbox/@border-\fbox@corner-#2x}}%
+                  {\optionunit{/fbox/@border-\fbox@corner-#2y}}%
+                  {\optionunit{/fbox/@border-\fbox@corner-#2radius-x}}%
+                  {\optionunit{/fbox/@border-\fbox@corner-#2radius-y}}{\strip@pt\fbox@anglestart}{\strip@pt\fbox@angleend}%
+}
+
+% --------------------------------------------------------
+% Double border
+% --------------------------------------------------------
+
+\newcommand*\fbox@border@pict@double[3]{% octant1, octant2, side no
+  \fbox@setoct@angles{#1}% 
+  \fbox@border@hcornerarc@[1]{}{#1}{0}%
+  \fbox@setoct@angles{-#2}%  
+  \fbox@border@hcornerarc@{}{-#2}{0}%
+  \fbox@setoct@angles[i]{#2}%  
+  \fbox@border@hcornerarc@{}{#2}{0.33}%
+  \fbox@setoct@angles[i]{-#1}%
+  \fbox@border@hcornerarc@{}{-#1}{0.33}%
+  \closepath
+  \fillpath
+  %
+  \fbox@setoct@angles{#1}% 
+  \fbox@border@hcornerarc@[1]{}{#1}{0.66}%
+  \fbox@setoct@angles{-#2}%  
+  \fbox@border@hcornerarc@{}{-#2}{0.66}%
+  \fbox@setoct@angles[i]{#2}%  
+  \fbox@border@hcornerarc@{}{#2}{1}%
+  \fbox@setoct@angles[i]{-#1}%
+  \fbox@border@hcornerarc@{}{-#1}{1}%
+  \closepath
+  \fillpath
+}
+
+% a half corner arc; but only over 'fraction' of the border width
+% assumes zero radius will just draw a line to the center point
+\newcommand*\fbox@border@hcornerarc@[4][0]{% [lmn], i(nner), octant, width fraction
+  % determine radius and center point for the width fraction
+  \fbox@setotherside
+  \iftoggle{/fbox/@side-horizontal}%
+    {\@tempdima#4\option{/fbox/border-\fbox@otherside-width}%
+     \@tempdimb#4\option{/fbox/border-\fbox@side-width}}%
+    {\@tempdimb#4\option{/fbox/border-\fbox@otherside-width}%
+     \@tempdima#4\option{/fbox/border-\fbox@side-width}}%
+  \@tempdimc\fbox@adjustx{\@tempdima}%
+  \@tempdima\dimexpr\option{/fbox/@border-\fbox@corner-radius-x} - \@tempdima\relax
+  \ifdim\@tempdima<\z@
+    \@tempdima\z@
+  \else
+    \@tempdimc\option{/fbox/@border-\fbox@corner-x}%
+  \fi
+  \@tempdimd\fbox@adjusty{\@tempdimb}%
+  \@tempdimb\dimexpr\option{/fbox/@border-\fbox@corner-radius-y} - \@tempdimb\relax
+  \ifdim\@tempdimb<\z@
+    \@tempdimb\z@
+  \else
+    \@tempdimd\option{/fbox/@border-\fbox@corner-y}%
+  \fi
+  \edef\fbox@radiusx{\strip@pt\@tempdima}%
+  \edef\fbox@radiusy{\strip@pt\@tempdimb}%
+  \edef\fbox@x{\strip@pt\@tempdimc}%
+  \edef\fbox@y{\strip@pt\@tempdimd}%
+  %\typeout{radius:\fbox@radiusx,\fbox@radiusy}%
+  \elliparc[#1]{\fbox@x}{\fbox@y}%
+                  {\fbox@radiusx}{\fbox@radiusy}%
+                  {\strip@pt\fbox@anglestart}{\strip@pt\fbox@angleend}%
+}
+
+% --------------------------------------------------------
+% Groove and Ridge border
+% --------------------------------------------------------
+
+% draw a side border
+\newtoggle{fbox@innerdark}%
+\newcommand*\fbox@border@pict@groove{% octant1, octant2, side no
+  \ifnum\fbox@oct>5\toggletrue{fbox@innerdark}\else\togglefalse{fbox@innerdark}\fi
+  \fbox@border@pict@grooved%
+}
+\newcommand*\fbox@border@pict@ridge{% octant1, octant2, side no
+  \ifnum\fbox@oct<6\toggletrue{fbox@innerdark}\else\togglefalse{fbox@innerdark}\fi
+  \fbox@border@pict@grooved%
+}
+
+\newcommand*\fbox@border@pict@grooved[3]{% octant, octant, side no
+  \iftoggle{fbox@innerdark}{}%
+    {\color{\option{/fbox/border-\fbox@side-color}\option{/fbox/border-dark-mix}}}%
+  \fbox@setoct@angles{#1}% 
+  \fbox@border@hcornerarc@[1]{}{#1}{0}%
+  \fbox@setoct@angles{-#2}%  
+  \fbox@border@hcornerarc@{}{-#2}{0}%
+  \fbox@setoct@angles[i]{#2}%  
+  \fbox@border@hcornerarc@{}{#2}{0.5}%
+  \fbox@setoct@angles[i]{-#1}%
+  \fbox@border@hcornerarc@{}{-#1}{0.5}%
+  \closepath
+  \fillpath
+  %
+  \iftoggle{fbox@innerdark}%
+    {\color{\option{/fbox/border-\fbox@side-color}\option{/fbox/border-dark-mix}}}%
+    {\optioncolor{/fbox/border-\fbox@side-color}}%
+  \fbox@setoct@angles{#1}% 
+  \fbox@border@hcornerarc@[1]{}{#1}{0.5}%
+  \fbox@setoct@angles{-#2}%  
+  \fbox@border@hcornerarc@{}{-#2}{0.5}%
+  \fbox@setoct@angles[i]{#2}%  
+  \fbox@border@hcornerarc@{}{#2}{1}%
+  \fbox@setoct@angles[i]{-#1}%
+  \fbox@border@hcornerarc@{}{-#1}{1}%
+  \closepath
+  \fillpath
+}
+
+% --------------------------------------------------------
+% Inset and outset border 
+% --------------------------------------------------------
+
+\newcommand*\fbox@border@pict@inset{% octant1, octant2, side no
+  \ifnum\fbox@oct<6\relax\color{\option{/fbox/border-\fbox@side-color}\option{/fbox/border-dark-mix}}\fi
+  \fbox@border@pict@inoutset
+}
+\newcommand*\fbox@border@pict@outset{% octant1, octant2, side no
+  \ifnum\fbox@oct>5\relax\color{\option{/fbox/border-\fbox@side-color}\option{/fbox/border-dark-mix}}\fi
+  \fbox@border@pict@inoutset
+}
+\newcommand*\fbox@border@pict@inoutset[3]{% octant1, octant2, side no
+  \fbox@border@hcornerarc[1]{}{#1}%
+  \fbox@setoct@angles{-#2}%  
+  \fbox@border@hcornerarc{}{-#2}%
+  \fbox@setoct@angles[i]{#2}%  
+  \fbox@border@hcornerarc{i}{#2}%
+  \fbox@setoct@angles[i]{-#1}%
+  \fbox@border@hcornerarc{i}{-#1}%
+  \closepath
+  \fillpath
+}
+
+
+
+% --------------------------------------------------------
+% Dashed & Dotted
+% --------------------------------------------------------
+\newtoggle{fbox@dotted}
+\newlength\fbox@dash
+\newlength\fbox@dashskip
+
+
+\newcommand*\fbox@border@pict@dotted{%  octant1, octant2, side no
+  \toggletrue{fbox@dotted}% 
+  \fbox@border@pict@dashed@%
+}
+
+\newcommand*\fbox@border@pict@dashed{%  octant1, octant2, side no
+  \togglefalse{fbox@dotted}%
+  \fbox@border@pict@dashed@%
+}
+
+\newcommand*\fbox@border@pict@dashed@[3]{%  octant1, octant2; side no; (shared between dotted and dashed
+  % calculate corner lengths
+  \fbox@setoct@angles{#2}%
+  \edef\fbox@cornerb{\fbox@corner}%%
+  \iftoggle{fbox@dotted}
+   {\fbox@dash\option{/fbox/border-\fbox@side-width}%
+    \fbox@dashskip\option{/fbox/border-\fbox@side-dotskip}}%
+   {\fbox@dash\option{/fbox/border-\fbox@side-dash}%
+    \fbox@dashskip\option{/fbox/border-\fbox@side-dashskip}}%
+  \fbox@let@cornerlen\fbox@blen%
+  %
+  \fbox@setoct@angles{#1}%
+  \edef\fbox@cornera{\fbox@corner}%
+  \fbox@let@cornerlen\fbox@alen%  
+  %\typeout{dashed \fbox@side: alen:\fbox@alen, blen:\fbox@blen }%
+  % 
+  % calculate dash skip 
+  \dimen@\dimexpr\option{/fbox/@border-\fbox@cornera-o\fbox@axis} - \option{/fbox/@border-\fbox@cornerb-o\fbox@axis}\relax
+  \ifdim\dimen@<0pt\relax\dimen@-\dimen@\fi
+  \advance\dimen@ by \dimexpr\fbox@alen + \fbox@blen\relax% total outer border length
+  \@tempdima\dimexpr\fbox@dash + \fbox@dashskip\relax% initial estimate of full dash
+  \@tempcnta\number\dimen@
+  \divide\@tempcnta by \number\@tempdima% full dashes that fit in the total
+  \@tempdimb\dimexpr\dimen@ - \the\@tempcnta\fbox@dash\relax% total skip space
+  \fbox@dashskip\dimexpr\@tempdimb/\the\@tempcnta\relax% final dashskip such that it fits nicely
+  \edef\fbox@dashfull{\the\dimexpr \fbox@dash + \fbox@dashskip\relax}%
+  %\typeout{ dash \fbox@side: \the\dimexpr\fbox@dash\relax, skip:\fbox@dashskip}%
+  %
+  \optioncolor{/fbox/border-\fbox@side-color}%
+  \fbox@dashcorner{\fbox@alen}%
+  \dimen@\dimexpr\fbox@alen - (\fbox@dashskip/2)\relax
+  \@tempcnta\number\dimen@
+  \divide\@tempcnta by \number\dimexpr\fbox@dashfull\relax
+  \advance\dimen@ by -\dimexpr\fbox@dashfull * \@tempcnta\relax
+  %\typeout{ delta \fbox@side - \fbox@corner: \the\fbox@delta, versus \the\dimen@}%
+  \fbox@delta\dimen@
+  \fbox@dashside%
+  \fbox@setoct@angles{#2}% again :(
+  \fbox@dashcorner{\fbox@blen}%
+}
+
+\newcommand*\fbox@dashside{% ', 
+  %\typeout{** dash: \iftoggle{/fbox/@side-horizontal}{hor}{ver}, \fbox@side, diaq=\the\fbox@diaq}%
+  \dimen@\dimexpr\option@dimmax{/fbox/@border-\fbox@cornera-o\fbox@axis}{/fbox/@border-\fbox@cornera-i\fbox@axis}\relax%
+  \@tempdima\dimexpr\option@dimmin{/fbox/@border-\fbox@cornerb-o\fbox@axis}{/fbox/@border-\fbox@cornerb-i\fbox@axis}\relax%
+  \ifdim\fbox@delta>\z@\relax
+    \ifdim\fbox@delta<\fbox@dash\relax
+      %\rule{\dimexpr\fbox@dash - #2}{#3}%
+      \fbox@dashdraw{\dimexpr\dimen@\relax}{\dimexpr\fbox@dash - \fbox@delta\relax}%
+      %\typeout{- add small rule and skip: \the\dimexpr\fbox@dash - \fbox@delta\relax, \fbox@dashskip}%
+    \else
+      %\typeout{- add just skip: \the\dimexpr\fbox@dashfull - \fbox@delta}%
+    \fi
+    \advance\dimen@ by \dimexpr\fbox@dashfull - \fbox@delta\relax%
+  \fi
+  \@whiledim\dimen@<\@tempdima\do{%
+    \advance\dimen@\fbox@dash\relax%
+    \ifdim\dimen@>\@tempdima\relax%
+      %\typeout{final dash: \the\dimen@, \fbox@dash, \the\dimexpr\fbox@dash + \@tempdima - \dimen@\relax}%
+      \fbox@dashdraw{\dimexpr\dimen@ - \fbox@dash\relax}{\dimexpr\fbox@dash + \@tempdima - \dimen@ + 0.1\p@\relax}%
+    \else
+      \fbox@dashdraw{\dimen@}{-\fbox@dash}%
+    \fi
+    \advance\dimen@\fbox@dashskip\relax%
+  }%
+}
+
+\newcommand*\fbox@dashdraw[2]{% x/y dash-len
+  \iftoggle{fbox@dotted}%
+   {\fbox@from\option{/fbox/border-\fbox@side-width}%%
+    \@tempdimb\dimexpr#2\relax%
+    \ifdim\@tempdimb=-\fbox@dash\relax
+      \iftoggle{/fbox/@side-horizontal}%
+        {\put(\strip@pt\dimexpr#1 + #2/2\relax,\strip@pt\dimexpr\fbox@adjusty{0.5\fbox@from}\relax){\circle*{\strip@pt\fbox@from}}}%
+        {\put(\strip@pt\dimexpr\fbox@adjustx{0.5\fbox@from}\relax,\strip@pt\dimexpr#1 + #2/2\relax){\circle*{\strip@pt\fbox@from}}}%
+    \fi
+   }%
+   {\iftoggle{/fbox/@side-horizontal}%
+      {\fbox@rect*{#1}{\fbox@adjusty{0pt}}{\dimexpr#1 + #2\relax}{\fbox@adjusty{\option{/fbox/border-\fbox@side-width}}}}%
+      {\fbox@rect*{\fbox@adjustx{0pt}}{#1}{\fbox@adjustx{\option{/fbox/border-\fbox@side-width}}}{\dimexpr #1 + #2}}%
+   }%
+}
+
+\newcommand*\fbox@rect{\@ifstar{\@tempswatrue\fbox@rect@}{\@tempswafalse\fbox@rect@}}%
+\newcommand*\fbox@rect@[4]{%
+  %\typeout{rect: #1,#2 - #3,#4}%
+  \edef\fbox@tempa{\opt@unit{#1}}%
+  \edef\fbox@tempb{\opt@unit{#2}}%
+  \edef\fbox@tempc{\opt@unit{#3}}%
+  \edef\fbox@tempd{\opt@unit{#4}}%
+  \moveto(\fbox@tempa,\fbox@tempb)%
+  \lineto(\fbox@tempa,\fbox@tempd)%
+  \lineto(\fbox@tempc,\fbox@tempd)%
+  \lineto(\fbox@tempc,\fbox@tempb)%
+  \closepath
+  \if@tempswa\fillpath\else\strokepath\fi
+}
+
+% --------------------------------------------------------
+% dashed corner
+% --------------------------------------------------------
+
+\newcommand*\fbox@let@cornerlen[1]{% \resultlen
+  \ellip@letarcperimeter{\option{/fbox/@border-\fbox@corner-radius-x}}{\option{/fbox/@border-\fbox@corner-radius-y}}%
+                        {\fbox@anglestart}{\fbox@angleend}#1%
+  \ifdim\option{/fbox/@border-\fbox@corner-iradius-\fbox@axis}>\z@\relax\else
+    % add abs|ix-x| to the calculated alen
+    %\typeout{ sharp corner \fbox@corner: adjust}%
+    \iftoggle{fbox@dotted}%
+     {\dimen@\dimexpr\fbox@dash\relax}%
+     {\dimen@\dimexpr\option{/fbox/@border-\fbox@corner-i\fbox@axis}-\option{/fbox/@border-\fbox@corner-\fbox@axis}\relax%
+      \ifdim\dimen@<\z@\relax \dimen@-\dimen@\fi
+      \advance\dimen@ by \dimexpr#1\relax
+      %\typeout{ unadjust len: \the\dimen@}%
+      % now adjust to look good later on since we will always fill a sharp corner
+      \ifdim\dimen@>\fbox@dash\relax\dimen@\fbox@dash\fi
+     }%
+    \edef#1{\the\dimexpr\dimen@ + (\fbox@dashskip/2)\relax}% 
+  \fi
+  %\typeout{ corner length: \fbox@side - \fbox@corner: #1}%
+}%
+
+\newcommand*\fbox@dashcorner[1]{%'\corner length  ''
+  \ifdim\option{/fbox/@border-\fbox@corner-iradius-x}>\z@%\fbox@dashfull\relax
+    % draw rounded dashes
+    \fbox@dash@roundedcorner{#1}%
+  \else
+    \iftoggle{fbox@dotted}%
+     {% get mininum width
+      \@tempdima\dimexpr\option{/fbox/@border-\fbox@corner-ix}-\option{/fbox/@border-\fbox@corner-x}\relax
+      \ifdim\@tempdima<\z@\@tempdima-\@tempdima\fi
+      \@tempdimb\dimexpr\option{/fbox/@border-\fbox@corner-iy}-\option{/fbox/@border-\fbox@corner-y}\relax
+      \ifdim\@tempdimb<\z@\@tempdimb-\@tempdimb\fi
+      \ifdim\@tempdimb<\@tempdima\@tempdima\@tempdimb\fi
+      % radius of corner circle is half
+      \@tempdima0.5\@tempdima
+      \edef\fbox@radius{\strip@pt\@tempdima}%
+      % determine center
+      \ifnum\fbox@quad>2
+        \@tempdimb\dimexpr\option{/fbox/@border-\fbox@corner-iy} - \@tempdima\relax
+      \else
+        \@tempdimb\dimexpr\option{/fbox/@border-\fbox@corner-iy} + \@tempdima\relax
+      \fi
+      \ifnum\fbox@quad=2
+        \@tempdima\dimexpr\option{/fbox/@border-\fbox@corner-ix} - \@tempdima\relax
+      \else\ifnum\fbox@quad=3
+        \@tempdima\dimexpr\option{/fbox/@border-\fbox@corner-ix} - \@tempdima\relax
+      \else
+        \@tempdima\dimexpr\option{/fbox/@border-\fbox@corner-ix} + \@tempdima\relax
+      \fi\fi
+      % determine angles
+      \@tempdimc\numexpr(\fbox@quad - 1) * 90 + 45\relax\p@
+      \@tempdimd\dimexpr\@tempdimc + 180\p@\relax
+      \edef\fbox@temp{\number\fbox@oct}%
+      \ifodd\fbox@temp
+        \advance\@tempdimc by -180\p@
+        \advance\@tempdimd by -180\p@
+      \fi
+      %\typeout{ half circle: \fbox@side - \fbox@corner, \the\@tempdimc -> \the\@tempdimd}%
+      \edef\fbox@anglea{\strip@pt\@tempdimc}%
+      \edef\fbox@angleb{\strip@pt\@tempdimd}%
+      \put(\strip@pt\@tempdima,\strip@pt\@tempdimb){\arc*[\fbox@anglea,\fbox@angleb]{\fbox@radius}}%
+    }%
+    {\ifdim\option{/fbox/@border-\fbox@corner-radius-x}>\z@%
+        % an inside sharp corner, fill.
+        %\typeout{draw sharp }%
+        \moveto(\optionunit{/fbox/@border-\fbox@corner-ix},\optionunit{/fbox/@border-\fbox@corner-iy})% inner corner
+        \iftoggle{/fbox/@side-horizontal}%
+          {\lineto(\optionunit{/fbox/@border-\fbox@corner-ox},\optionunit{/fbox/@border-\fbox@side-iy})
+           \lineto(\optionunit{/fbox/@border-\fbox@corner-ox},\optionunit{/fbox/@border-\fbox@side-y})}
+          {\lineto(\optionunit{/fbox/@border-\fbox@side-ix},\optionunit{/fbox/@border-\fbox@corner-oy})
+           \lineto(\optionunit{/fbox/@border-\fbox@side-x},\optionunit{/fbox/@border-\fbox@corner-oy})}
+        %\fbox@border@hcornerarc{}{}{#3}{}%
+        \elliparc{\optionunit{/fbox/@border-\fbox@corner-x}}%
+                  {\optionunit{/fbox/@border-\fbox@corner-y}}%
+                  {\optionunit{/fbox/@border-\fbox@corner-radius-x}}%
+                  {\optionunit{/fbox/@border-\fbox@corner-radius-y}}{\strip@pt\fbox@angleend}{\strip@pt\fbox@anglestart}%
+        \closepath\fillpath
+      \else
+        % a non-rounded corner, draw a triangle
+        %\typeout{draw sharp  - \fbox@corner, axis=\fbox@axis}
+        \moveto(\optionunit{/fbox/@border-\fbox@corner-ix},\optionunit{/fbox/@border-\fbox@corner-iy})% inner corner
+        \lineto(\optionunit{/fbox/@border-\fbox@corner-x},\optionunit{/fbox/@border-\fbox@corner-y})% outer corner
+        \iftoggle{/fbox/@side-horizontal}%
+          {\lineto(\optionunit{/fbox/@border-\fbox@corner-ix},\optionunit{/fbox/@border-\fbox@corner-y})}% outside opposite inner corner
+          {\lineto(\optionunit{/fbox/@border-\fbox@corner-x},\optionunit{/fbox/@border-\fbox@corner-iy})}% outside opposite inner corner
+        \closepath
+        \fillpath
+      \fi
+     }%
+  \fi
+}
+
+% --------------------------------------------------------
+% Dashed rounded corner
+% --------------------------------------------------------
+
+\newlength\fbox@anglecur
+%\newlength\fbox@angleend
+\newlength\fbox@dashangle
+\newlength\fbox@dashskipangle
+\newlength\fbox@delta
+\newlength\fbox@from
+\newlength\fbox@to
+
+\newcommand*\fbox@dash@roundedcorner[1]{%  'corner len'
+  %\typeout{ dash corner: \fbox@side - \fbox@corner, len=#1, start,end=\the\fbox@anglestart,\the\fbox@angleend}%
+  \trig@atantan{\option{/fbox/@border-\fbox@corner-radius-x}}{\option{/fbox/@border-\fbox@corner-radius-y}}{\fbox@anglestart}\fbox@anglestart%
+  \trig@atantan{\option{/fbox/@border-\fbox@corner-radius-x}}{\option{/fbox/@border-\fbox@corner-radius-y}}{\fbox@angleend}\fbox@angleend%
+  %
+  \fbox@delta\dimexpr\fbox@angleend - \fbox@anglestart\relax%
+  \fbox@dashangle\dimexpr \fbox@delta * \dimexpr\fbox@dash\relax / \dimexpr#1\relax%
+  \fbox@dashskipangle\dimexpr \fbox@delta * \dimexpr\fbox@dashskip\relax / \dimexpr#1\relax%
+  %\typeout{ delta=\the\fbox@delta, dash angle=\the\fbox@dashangle, skip angle=\the\fbox@dashskipangle}%
+  \advance\fbox@anglestart by 0.5\fbox@dashskipangle% start with skip
+  \ifdim\fbox@dashangle<\z@\relax\edef\fbox@cmp{>}\else\edef\fbox@cmp{<}\fi
+  \@whiledim\fbox@anglestart\fbox@cmp\fbox@angleend\do\fbox@dash@roundedcornerdash%
+}
+
+\newcommand*\fbox@dash@roundedcornerdash{%  
+  \fbox@from\fbox@anglestart
+  \advance\fbox@anglestart by \fbox@dashangle
+  \ifdim\fbox@angleend\fbox@cmp\fbox@anglestart\relax
+    %\typeout{too much? \the\fbox@anglestart, and \the\fbox@angleend}%
+    \fbox@to\fbox@angleend
+  \else
+    \fbox@to\fbox@anglestart
+  \fi
+  \iftoggle{fbox@dotted}%
+   {% take mid angle
+    \fbox@to\fbox@anglestart
+    \advance\fbox@to\fbox@from
+    \divide\fbox@to by 2
+    \edef\fbox@angle{\strip@pt\fbox@to}%
+    \CalculateSin{\fbox@angle}\CalculateCos{\fbox@angle}%
+    % calculate inner and middle point on the ellipse
+    \fbox@from\UseCos{\fbox@angle}\option{/fbox/@border-\fbox@corner-iradius-x}%
+    \fbox@to\UseSin{\fbox@angle}\option{/fbox/@border-\fbox@corner-iradius-y}%
+    \@tempdima0.5\dimexpr\option{/fbox/@border-\fbox@corner-radius-x} + \option{/fbox/@border-\fbox@corner-iradius-x}\relax
+    \@tempdimb0.5\dimexpr\option{/fbox/@border-\fbox@corner-radius-y} + \option{/fbox/@border-\fbox@corner-iradius-y}\relax
+    \@tempdima\UseCos{\fbox@angle}\@tempdima
+    \@tempdimb\UseSin{\fbox@angle}\@tempdimb
+    % use circle radius of distance between inner and middle point
+    \advance\fbox@from by -\@tempdima
+    \advance\fbox@to by -\@tempdimb
+    \pIIe@ellip@csqrt{\fbox@from}{\fbox@to}\dimen@% cache csqrt since for fixed width this is always the same
+    \edef\fbox@temp{\strip@pt\dimexpr2\dimen@\relax}%
+    %\typeout{ (a,b)=(\the\@tempdima,\the\@tempdimb), (c,d)=(\the\fbox@from,\the\fbox@to), distance=\the\dimen@}%
+    % move to center and draw
+    \advance\@tempdima by \dimexpr\option{/fbox/@border-\fbox@corner-x}\relax%
+    \advance\@tempdimb by \dimexpr\option{/fbox/@border-\fbox@corner-y}\relax%
+    \put(\strip@pt\@tempdima,\strip@pt\@tempdimb){\circle*{\fbox@temp}}%
+   }%
+   {\edef\fbox@from@{\strip@pt\fbox@from}%
+    \edef\fbox@to@{\strip@pt\fbox@to}%
+    % draw a rounded dash
+    \@ovro\option{/fbox/@border-\fbox@corner-radius-x}%
+    \@ovri\option{/fbox/@border-\fbox@corner-radius-y}%
+    \pIIe@elliparc@t{1}{\option{/fbox/@border-\fbox@corner-x}}{\option{/fbox/@border-\fbox@corner-y}}%
+                {\fbox@from@}{\fbox@to@}%
+    % and for the inner circle              
+    \@ovro\option{/fbox/@border-\fbox@corner-iradius-x}%
+    \@ovri\option{/fbox/@border-\fbox@corner-iradius-y}%
+    \pIIe@elliparc@t{0}{\option{/fbox/@border-\fbox@corner-ix}}{\option{/fbox/@border-\fbox@corner-iy}}%
+                {\fbox@to@}{\fbox@from@}%
+
+    \closepath
+    \fillpath
+   }%
+  \advance\fbox@anglestart by \fbox@dashskipangle%
+}
+
+
+
+% ------------------------------------------------------------------------------
+% Define standard border styles
+%
+% a style has the form \fbox@border@plain@<style>{<side-name>}{<border-width>}{<total length>}
+% where <side> is the border side
+%       <direction> is either "h" or "v" (horizontal or vertical)
+%       <borderwidth> the width of the rule
+%
+% predefined styles: none, hidden, solid, transparent, and dashed
+
+\newcommand*\fbox@border@plain@none[3]{}
+\newcommand*\fbox@border@plain@hidden[3]{}
+
+\newcommand*\fbox@border@plain@transparent[3]{%
+  \iftoggle{/fbox/@side-horizontal}%
+    {\hrule width #3 height \z@\relax}%
+    {\vrule width \z@ height #3\relax}%
+}
+
+\newcommand*\fbox@border@plain@solid[3]{%
+  \iftoggle{/fbox/@side-horizontal}%
+    {\hrule width #3 height #2\relax}%
+    {\vrule width #2 height #3\relax}%
+}
+
+\newcommand*\fbox@border@plain@dashed[3]{%
+  \iftoggle{/fbox/@side-horizontal}%
+   {\edef\fbox@dash{\vrule width \option{/fbox/border-#1-dash} height #2}%
+    \edef\fbox@dashskip{\hskip \option{/fbox/border-#1-dashskip} plus 0.25ex minus 0.25ex}%
+    \hbox to #3{\fbox@dash\fbox@dashskip\xleaders\hbox{\fbox@dash\fbox@dashskip}\hfill\fbox@dash}}%
+   {\edef\fbox@dash{\hrule height \option{/fbox/border-#1-dash} width #2}%
+    \edef\fbox@dashskip{\vskip \option{/fbox/border-#1-dashskip} plus 0.25ex minus 0.25ex}%
+    \vbox to #3{\offinterlineskip\fbox@dash\fbox@dashskip\xleaders\vbox{\fbox@dash\fbox@dashskip}\vfill\fbox@dash}}%
+}
+
+\newcommand*\fbox@border@plain@dotted[3]{%
+  \iftoggle{/fbox/@side-horizontal}%
+   {\edef\fbox@dot{\vrule width #2 height #2}%
+    \edef\fbox@dotskip{\hskip \option{/fbox/border-#1-dotskip} plus 0.5ex minus 0.1ex}%
+    \hbox to #3{\xleaders\hbox{\fbox@dot\fbox@dotskip}\hfill\hbox{\fbox@dot}}}%
+   {\edef\fbox@dot{\hrule height #2 width #2}%
+    \edef\fbox@dotskip{\vskip \option{/fbox/border-#1-dotskip} plus 0.5ex minus 0.1ex}%
+    \vbox to #3{\fbox@dotskip\offinterlineskip\cleaders\vbox{\fbox@dot\fbox@dotskip}\vfill}}%
+}
+
+% --------------------------------------------------------
+%
+% --------------------------------------------------------
+\newcommand\fbox@setdim{%
+  %\typeout{ set dim}%
+  \iftoggle{/longbox/@part-needtop}{\def\fbox@top{top}}{\def\fbox@top{break-top}}%
+  \iftoggle{/longbox/@part-needbottom}{\def\fbox@bottom{bottom}}{\def\fbox@bottom{break-bottom}}%
+  \options{%
+    /fbox/@padding-box-height=\option{/fbox/@content-box-height}% full height (including depth)
+      +\option{/fbox/padding-\fbox@top} +\option{/fbox/padding-\fbox@bottom},%
+    /fbox/@padding-box-depth=\option{/fbox/@content-box-depth} + \option{/fbox/padding-\fbox@bottom},%
+    /fbox/@padding-box-width=\option{/fbox/@content-box-width}%
+      +\option{/fbox/padding-left}+\option{/fbox/padding-right},
+    /fbox/@border-box-width=\option{/fbox/@padding-box-width}%
+      +\option{/fbox/border-left-width}+\option{/fbox/border-right-width},%
+    /fbox/@border-box-height=\option{/fbox/@padding-box-height}% full height
+      +\option{/fbox/border-\fbox@top-width}%
+      +\option{/fbox/border-\fbox@bottom-width},%
+    /fbox/@border-box-depth=\option{/fbox/@padding-box-depth}%
+      +\option{/fbox/border-\fbox@bottom-width},%
+  }%
+  % lower/raise for break boxes
+  %\@tempdima=\z@\relax
+  %\advance\@tempdima by \dimexpr\option{/fbox/padding-\fbox@bottom} + \option{/fbox/margin-\fbox@bottom} + \option{/fbox/border-\fbox@bottom-width}\relax%
+  %\advance\@tempdima by -\dimexpr\option{/fbox/padding-\fbox@top} + \option{/fbox/margin-\fbox@top} + \option{/fbox/border-\fbox@top-width}\relax%
+  %\option@invoke{/fbox/@lower}{\@tempdima}%
+  % limit radius
+  \optionradiuslimit{/fbox/@border-top-left-radius-y}{/fbox/@border-bottom-left-radius-y}%
+                    {0pt}{\option{/fbox/@border-box-height}}%
+  \optionradiuslimit{/fbox/@border-top-right-radius-y}{/fbox/@border-bottom-right-radius-y}%
+                    {0pt}{\option{/fbox/@border-box-height}}%
+  \optionradiuslimit{/fbox/@border-top-left-radius-x}{/fbox/@border-top-right-radius-x}%
+                    {0pt}{\option{/fbox/@border-box-width}}%
+  \optionradiuslimit{/fbox/@border-bottom-left-radius-x}{/fbox/@border-bottom-right-radius-x}%
+                    {0pt}{\option{/fbox/@border-box-width}}%\
+  % switch to plain mode if this is a simple box; todo: is it worth to do this test? 
+  \ifnum\option{/fbox/render/@ord}=0\relax
+    \option@invoke{/fbox/render}{plain}%
+    \def\fbox@stylex{}%
+    \def\fbox@colorx{}%
+    \def\do##1{%
+      \letoption{/fbox/border-##1-style}\fbox@style
+      \eifstrequal{\fbox@style}{none}{}{%
+        \option@ifanyof{\fbox@style}{solid,dashed}{%
+          \eifblank{\fbox@stylex}{\let\fbox@stylex\fbox@style}{%
+            \ifx\fbox@style\fbox@stylex\else\option@invoke{/fbox/render}{picture}\expandafter\listbreak\fi
+          }%
+        }{\option@invoke{/fbox/render}{picture}\listbreak}%
+      }%
+      \letoption{/fbox/border-##1-color}\fbox@color
+      \eifblank{\fbox@colorx}{\let\fbox@colorx\fbox@color}{%
+        \ifx\fbox@color\fbox@colorx\else\option@invoke{/fbox/render}{picture}\expandafter\listbreak\fi
+      }%
+    }%
+    \docsvlist{top,left,bottom,right,break-top,break-bottom}%
+    \ifnum\option{/fbox/render/@ord}=1\relax
+      \def\do##1{%
+         \ifdim\option{/fbox/@border-##1-radius-x}=\z@\relax\else\option@invoke{/fbox/render}{picture}\expandafter\listbreak\fi
+         \ifdim\option{/fbox/@border-##1-radius-y}=\z@\relax\else\option@invoke{/fbox/render}{picture}\expandafter\listbreak\fi
+      }%
+      \docsvlist{top-left,top-right,bottom-left,bottom-right}%
+    \fi
+    \ifnum\option{/fbox/render/@ord}=1\relax
+      \def\do##1{%
+         \letoption{/fbox/picture-##1}\fbox@temp
+         \eifblank{\fbox@temp}{}{\option@invoke{/fbox/render}{picture}\listbreak}%
+      }%
+      \docsvlist{insert-before,insert-after,side-insert-before,side-insert-after}%
+    \fi
+  \fi
+}
+
+\newrobustcmd*\fbox@border@plain[2]{%
+  \ifnum\option{/fbox/render/@ord}<2\relax
+    \begingroup
+      \option@invoke{/fbox/@side}{#1}%
+      \ifx#2h\relax
+        \toggletrue{/fbox/@side-horizontal}%
+        \def\fbox@length{\option{/fbox/@border-box-width}}%
+      \else
+        \togglefalse{/fbox/@side-horizontal}%
+        \def\fbox@length{\option{/fbox/@padding-box-height}}%
+      \fi%
+      \edef\fbox@rendername{fbox@border@plain@\option{/fbox/border-#1-style}}%
+      \optioncolor{/fbox/border-#1-color}% set color already
+      \option{/fbox/plain-side-insert-before}%
+      \ifcsdef{\fbox@rendername}%
+        {\csuse{\fbox@rendername}{#1}{\option{/fbox/border-#1-width}}{\fbox@length}}%
+        {\PackageWarning{longfbox}{Unknown (plain) border style "\option{/fbox/border-#1-style}": using "solid" instead}{}%
+         \fbox@border@plain@solid{#1}{\option{/fbox/border-#1-width}}{\fbox@length}}%
+      \option{/fbox/plain-side-insert-after}%
+    \endgroup
+  \else
+    \kern\option{/fbox/border-#1-width}%
+  \fi    
+}
+
+\newrobustcmd*\fbox@kern[3][]{%
+  \iftoggle{/fbox/show-markers}{%
+    \begingroup
+    \optioncolor{/fbox/marker-color}%
+    \ifx#2v\relax
+      \def\fbox@marker{\vrule width \option{/fbox/marker-width} height \option{#3}}%
+      \eifblank{#1}{\hbox{\fbox@marker}}{\vbox{\hbox to \option{#1}{\fbox@marker\hfill\hfill\fbox@marker}}}%
+    \else
+      \def\fbox@marker{\vrule height \option{/fbox/marker-width} width \option{#3}}%
+      \setlength\dimen@{\option{/fbox/marker-width}}%
+      \eifblank{#1}{}{\advance\dimen@ \dimexpr -\option{#1}\relax\relax}%
+      \lower \dimen@\hbox{\fbox@marker}%
+    \fi
+    \endgroup
+  }%
+  {\kern\option{#3}}%
+}
+
+\newrobustcmd*\fbox@plain@bgcolor[1]{%
+  \ifnum\option{/fbox/render/@ord}<2\relax
+    \ifoptionblank{/fbox/background-#1-color}{}{%
+      \vtop to 0pt{%
+        \hbox to 0pt{%
+          \optioncolor{/fbox/background-#1-color}%
+          \rule{\option{/fbox/@#1-box-width}}{\option{/fbox/@#1-box-height}}%
+          \hss
+        }%
+        \vss
+      }%
+    }%
+  \fi 
+}
+
+\newrobustcmd*\fbox@render{%
+  \begingroup
+  \fbox@setdim
+  %\typeout{render: height:\the\dimexpr\option{/fbox/@content-box-height}, lower=\the\dimexpr\option{/fbox/@lower}}%
+  \hbox{%
+    \fbox@kern{h}{/fbox/margin-left}%
+    \option{/fbox/render-insert-before}%  
+    \lower \option{/fbox/@lower}%
+    \vbox{\offinterlineskip
+      \fbox@kern{v}{/fbox/margin-\fbox@top}%    
+      \ifnum\option{/fbox/background-clip/@ord}=0\relax\fbox@plain@bgcolor{border}\fi      
+      \fbox@border@pict%
+      \fbox@border@plain{\fbox@top}{h}%
+      \hbox{%
+        \fbox@border@plain{left}{v}%
+        \ifnum\option{/fbox/background-clip/@ord}=1\relax\fbox@plain@bgcolor{padding}\fi      
+        \fbox@kern[/fbox/@padding-box-depth]{h}{/fbox/padding-left}%
+        \vbox{\offinterlineskip
+          \fbox@kern[/fbox/@content-box-width]{v}{/fbox/padding-\fbox@top}%
+          \ifnum\option{/fbox/background-clip/@ord}=2\relax\fbox@plain@bgcolor{content}\fi
+          \kern \option{/fbox/@content-box-height}%
+          \hrule height \z@ width \option{/fbox/@content-box-width}\relax
+          \fbox@kern[/fbox/@content-box-width]{v}{/fbox/padding-\fbox@bottom}%
+        }%
+        \fbox@kern[/fbox/@padding-box-depth]{h}{/fbox/padding-right}%
+        \fbox@border@plain{right}{v}%
+      }%
+      \fbox@border@plain{\fbox@bottom}{h}%
+      \fbox@border@pict@after%      
+      \fbox@kern{v}{/fbox/margin-\fbox@bottom}%
+    }%
+    \option{/fbox/render-insert-after}%    
+    \fbox@kern{h}{/fbox/margin-right}%
+  }%
+  \endgroup
+}
+
+\options{%
+  /fbox/.new family = {/longbox},
+}
+\options{/fbox,
+  % compatability
+  sep/.new style      = {/fbox/padding=#1},
+  rule/.new style     = {/fbox/border-width=#1},
+  % styles
+  margin/.new sides,
+  padding/.new sides,
+  border-width/.new sides   = {/fbox/border-top-width=#1,/fbox/border-right-width=#2,%
+                               /fbox/border-bottom-width=#3,/fbox/border-left-width=#4,%
+                               /fbox/border-break-top-width=#1,/fbox/border-break-bottom-width=#3},
+  border-color/.new sides   = {/fbox/border-top-color=#1,/fbox/border-right-color=#2,%
+                               /fbox/border-bottom-color=#3,/fbox/border-left-color=#4,%
+                               /fbox/border-break-top-color=#1,/fbox/border-break-bottom-color=#3},
+  border-style/.new sides   = {/fbox/border-top-style=#1,/fbox/border-right-style=#2,%
+                               /fbox/border-bottom-style=#3,/fbox/border-left-style=#4},
+  border-break-style/.new style = {/fbox/border-break-top-style=#1,/fbox/border-break-bottom-style=#1},
+  border-break-width/.new style = {/fbox/border-break-top-width=#1,/fbox/border-break-bottom-width=#1},
+  border-break-color/.new style = {/fbox/border-break-top-color=#1,/fbox/border-break-bottom-color=#1},
+  padding-break/.new style  = {/fbox/padding-break-top=#1,/fbox/padding-break-bottom=#1},
+  margin-break/.new style  = {/fbox/margin-break-top=#1,/fbox/margin-break-bottom=#1},
+  % background
+  background-clip/.new choice={border-box,padding-box,content-box},
+  background-color/.new color = {},
+  background-padding-color/.new color expr = \option{/fbox/background-color},
+  background-border-color/.new color expr  = \option{/fbox/background-color}, 
+  background-content-color/.new color expr = \option{/fbox/background-color},
+  % various
+  show-markers/.new toggle,
+  marker-color/.new color = gray,
+  marker-width/.new dim = 0.1pt,   
+  render/.new choice = {default, plain, picture},
+  render-insert-before/.new value,
+  render-insert-after/.new value,
+  plain-side-insert-before/.new value,
+  plain-side-insert-after/.new value,
+  picture-insert-before/.new value,
+  picture-insert-after/.new value,
+  picture-side-insert-before/.new value,
+  picture-side-insert-after/.new value,
+  % scoped (init) keys; these are reinitialized for nested scopes.
+  padding-top/.new length = {\fboxsep},
+  padding-right/.new length = {\fboxsep},
+  padding-bottom/.new length = {\fboxsep},
+  padding-left/.new length = {\fboxsep},
+  padding-break-top/.new length = {2pt},
+  padding-break-bottom/.new length = {2pt},
+  margin-top/.new length,
+  margin-right/.new length,
+  margin-bottom/.new length,
+  margin-left/.new length,
+  margin-break-top/.new length,
+  margin-break-bottom/.new length,
+  % borders: width
+  border-top-width/.new length = {\fboxrule},
+  border-right-width/.new length = {\fboxrule},
+  border-bottom-width/.new length = {\fboxrule},
+  border-left-width/.new length = {\fboxrule},
+  border-break-top-width/.new length = {\fboxrule},
+  border-break-bottom-width/.new length = {\fboxrule},    
+  % borders: color
+  border-top-color/.new color = {.},
+  border-right-color/.new color = {.},
+  border-bottom-color/.new color = {.},
+  border-break-top-color/.new color = {.},
+  border-break-bottom-color/.new color = {.},
+  border-left-color/.new color = {.},
+  border-dark-mix/.new value = {!70!black}, 
+  % borders: style
+  border-top-style/.new value=solid,
+  border-right-style/.new value=solid,
+  border-bottom-style/.new value=solid,
+  border-left-style/.new value=solid,    
+  border-break-top-style/.new value=none,
+  border-break-bottom-style/.new value=none,
+  % corner radius
+  border-radius/.new cmd tuple = \optionsalso{
+    /fbox/border-top-left-radius={#1,#2},/fbox/border-top-right-radius={#1,#2},
+    /fbox/border-bottom-left-radius={#1,#2}, /fbox/border-bottom-right-radius={#1,#2}},
+  border-top-left-radius/.new cmd tuple
+    = \optionsalso{/fbox/@border-top-left-radius-x=#1,/fbox/@border-top-left-radius-y=#2},
+  border-top-right-radius/.new cmd tuple
+    = \optionsalso{/fbox/@border-top-right-radius-x=#1,/fbox/@border-top-right-radius-y=#2},
+  border-bottom-left-radius/.new cmd tuple
+    = \optionsalso{/fbox/@border-bottom-left-radius-x=#1,/fbox/@border-bottom-left-radius-y=#2},
+  border-bottom-right-radius/.new cmd tuple
+    = \optionsalso{/fbox/@border-bottom-right-radius-x=#1,/fbox/@border-bottom-right-radius-y=#2},
+  % dashes and dots
+  border-dash/.new sides   = {/fbox/border-top-dash=#1,/fbox/border-right-dash=#2,%
+                               /fbox/border-bottom-dash=#3,/fbox/border-left-dash=#4,%
+                               /fbox/border-break-top-dash=#1,/fbox/border-break-bottom-dash=#3},
+  border-dashskip/.new sides= {/fbox/border-top-dashskip=#1,/fbox/border-right-dashskip=#2,%
+                               /fbox/border-bottom-dashskip=#3,/fbox/border-left-dashskip=#4,%
+                               /fbox/border-break-top-dashskip=#1,/fbox/border-break-bottom-dashskip=#3},
+  border-dotskip/.new sides= {/fbox/border-top-dotskip=#1,/fbox/border-right-dotskip=#2,%
+                               /fbox/border-bottom-dotskip=#3,/fbox/border-left-dotskip=#4,%
+                               /fbox/border-break-top-dotskip=#1,/fbox/border-break-bottom-dotskip=#3},
+  border-top-dash/.new dim = 0.6ex,%3\option{/fbox/border-top-width},
+  border-bottom-dash/.new dim = 0.6ex,%3\option{/fbox/border-bottom-width},
+  border-left-dash/.new dim = 0.6ex,%3\option{/fbox/border-left-width},
+  border-right-dash/.new dim = 0.6ex,%3\option{/fbox/border-right-width},
+  border-break-top-dash/.new dim = \option{/fbox/border-top-dash},
+  border-break-bottom-dash/.new dim = \option{/fbox/border-bottom-dash},
+  border-top-dashskip/.new dim = 0.7\option{/fbox/border-top-dash},
+  border-bottom-dashskip/.new dim = 0.7\option{/fbox/border-bottom-dash},
+  border-left-dashskip/.new dim = 0.7\option{/fbox/border-left-dash},
+  border-right-dashskip/.new dim = 0.7\option{/fbox/border-right-dash},
+  border-break-top-dashskip/.new dim = \option{/fbox/border-top-dashskip},
+  border-break-bottom-dashskip/.new dim = \option{/fbox/border-bottom-dashskip},
+  border-top-dotskip/.new dim = 2\option{/fbox/border-top-width},
+  border-bottom-dotskip/.new dim = 2\option{/fbox/border-bottom-width},
+  border-left-dotskip/.new dim = 2\option{/fbox/border-left-width},
+  border-right-dotskip/.new dim = 2\option{/fbox/border-right-width},
+  border-break-top-dotskip/.new dim = \option{/fbox/border-top-dotskip},
+  border-break-bottom-dotskip/.new dim = \option{/fbox/border-bottom-dotskip},
+  % computed
+  @lower/.new length,
+  @content-box-width/.new dim = \option{/longbox/@content-box-width},
+  @content-box-height/.new dim = \option{/longbox/@content-box-height},
+  @content-box-depth/.new dim = \option{/longbox/@content-box-depth},
+  @padding-box-height/.new length,
+  @padding-box-depth/.new length,
+  @padding-box-width/.new length,
+  @border-box-width/.new length,
+  @border-box-height/.new length,
+  @border-box-depth/.new length,
+  % computed: not for the user
+  @border-top-left-radius-x/.new length,
+  @border-top-right-radius-x/.new length,
+  @border-bottom-left-radius-x/.new length,
+  @border-bottom-right-radius-x/.new length,
+  @border-top-left-radius-y/.new length,
+  @border-top-right-radius-y/.new length,
+  @border-bottom-left-radius-y/.new length,
+  @border-bottom-right-radius-y/.new length,
+  % computed inner radius; zero if border radius center is inside the borders
+  @border-top-left-iradius-x/.new dim,
+  @border-top-right-iradius-x/.new dim,
+  @border-bottom-left-iradius-x/.new dim,
+  @border-bottom-right-iradius-x/.new dim,
+  @border-top-left-iradius-y/.new dim,
+  @border-top-right-iradius-y/.new dim,
+  @border-bottom-left-iradius-y/.new dim,
+  @border-bottom-right-iradius-y/.new dim,
+  % computed inner corner coordinates (center of inner-radius) (where 0,0 is bottom-left)
+  @border-top-left-ix/.new length,
+  @border-top-left-iy/.new length,
+  @border-top-right-ix/.new length,
+  @border-top-right-iy/.new length,
+  @border-bottom-left-ix/.new length,
+  @border-bottom-left-iy/.new length,
+  @border-bottom-right-ix/.new length,
+  @border-bottom-right-iy/.new length,
+  % computed corner division angle
+  @border-top-left-phi/.new length,
+  @border-top-right-phi/.new length,
+  @border-bottom-left-phi/.new length,
+  @border-bottom-right-phi/.new length,
+  % computed various
+  @side/.new choice = {top,right,bottom,left,break-bottom,break-top},
+  @side-horizontal/.new toggle,
+}
+
+\newcommand\fbox@adjustoptions{%
+  %\typeout{ regular fbox adjustoptions}%
+  % set width of borders with style none to 0
+  \def\do##1{%
+    \ifoptionequal{/fbox/border-##1-style}{hidden}{\option@invoke{/fbox/border-##1-style}{none}}{}%
+    \ifoptionequal{/fbox/border-##1-style}{none}{%
+      \options{/fbox/border-##1-width=0pt}%
+    }{}%
+  }%
+  \docsvlist{top,right,bottom,left,break-bottom,break-top}%
+  \options{%
+    /longbox/skip-left=
+      \option{/fbox/border-left-width} + \option{/fbox/padding-left} + \option{/fbox/margin-left},
+    /longbox/skip-right=
+      \option{/fbox/border-right-width} + \option{/fbox/padding-right} + \option{/fbox/margin-right},
+    /longbox/skip-top=
+      \option{/fbox/border-top-width} + \option{/fbox/padding-top} + \option{/fbox/margin-top},
+    /longbox/skip-bottom=
+      \option{/fbox/border-bottom-width}+\option{/fbox/padding-bottom}+\option{/fbox/margin-bottom},
+    /longbox/skip-break-top=
+      \option{/fbox/border-break-top-width} + \option{/fbox/padding-break-top} + \option{/fbox/margin-break-top},
+    /longbox/skip-break-bottom=
+      \option{/fbox/border-break-bottom-width}+\option{/fbox/padding-break-bottom}+\option{/fbox/margin-break-bottom},
+  }%
+  \longbox@adjustoptions%
+}
+
+\newenvironment{longfbox}[1][]{%
+  \begin{longbox@env}{/fbox}{/longbox/render={\protect\fbox@render},/longbox/adjust-options={\protect\fbox@adjustoptions},#1}%
+}{\end{longbox@env}}
+
+\newcommand\lfbox[2][]{%
+  \begingroup
+    \longbox@cmd{/fbox}{/longbox/render={\protect\fbox@render},/longbox/adjust-options={\protect\fbox@adjustoptions},#1}{#2}%
+  \endgroup
+}
+
+\newcommand*\newfboxstyle[2]{%
+  \options{/fbox,#1/.new style* = {#2}}%
+}
+
+\newfboxstyle{rounded}{border-radius=1ex}
+\newfboxstyle{tight}{padding=0pt,margin=0pt,baseline-skip=false}
+\newfboxstyle{dotted}{border-width=0.8pt,border-style=dotted}
+
+\newcommand*\fboxset[1]{%
+  \options{/fbox,#1}%  
+}
\ No newline at end of file