/
sphinxpackageboxes.sty
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sphinxpackageboxes.sty
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%% COLOURED BOXES
%
% change this info string if making any custom modification
\ProvidesPackage{sphinxpackageboxes}[2023/03/07 v6.2.0 advanced colored boxes]
% Optionally executes \RequirePackage for:
%
% - pict2e. Ideally we would like to use the v0.4a 2020/08/16 release of this
% package as it allows dimensional arguments to its \moveto, \lineto, etc...
% Or we could use extra package "picture". We opt for custom wrappers
% \spx@moveto, \spx@lineto, ..., working with old versions.
% Provides box registers \spx@tempboxa, \spx@tempboxb usable in other places
\newbox\spx@tempboxa
\newbox\spx@tempboxb
%%%%%%%%%%%%%%%%
% Internal registers, conditionals, colors to be configured by each caller
% via a preliminary "setup" call
%
\newif\ifspx@boxes@withshadow
\newif\ifspx@boxes@insetshadow
\newif\ifspx@boxes@withbackgroundcolor
\newif\ifspx@boxes@withshadowcolor
\newif\ifspx@boxes@withbordercolor
%
\newdimen\spx@boxes@border
\newdimen\spx@boxes@border@top
\newdimen\spx@boxes@border@right
\newdimen\spx@boxes@border@bottom
\newdimen\spx@boxes@border@left
%
\newdimen\spx@boxes@padding@top
\newdimen\spx@boxes@padding@right
\newdimen\spx@boxes@padding@bottom
\newdimen\spx@boxes@padding@left
%
\newdimen\spx@boxes@shadow@xoffset
\newdimen\spx@boxes@shadow@yoffset
%
\newdimen\spx@boxes@radius@topleft % only circular arcs, x-radius same as y-radius
\newdimen\spx@boxes@radius@topright
\newdimen\spx@boxes@radius@bottomright
\newdimen\spx@boxes@radius@bottomleft
%
% These colours have to be defined appropriately by the callers, if the
% corresponding booleans are set to true
% spx@boxes@bordercolor
% spx@boxes@backgroundcolor
% spx@boxes@shadowcolor
%%%%%%%%%%%%%%%%
% "setup" macro
%
% It must be called prior to \spx@boxes@fcolorbox{@rounded,@insetshadow} for
% initializing its parameters.
%
% It also prepares \spx@boxes@fcolorbox to expand to one of
% \spx@boxes@fcolorbox@rectangle or \spx@boxes@fcolorbox@rounded depending on
% the configuration and availability of the pict2e package.
%
% Due to varying conventions regarding Color names (border, background,
% and shadow), they have to be passed as parameters #2, #3, #4.
% The #1 is one of: pre, topic, warning, danger, etc....
\def\spx@boxes@fcolorbox@setup#1#2#3#4{%
% All right sides expand to non-terminated dimen expressions (except for
% shadow@xoffset, shadow@yoffset, where the space of EOL terminates <N>sp)
% The \relax are not strictly needed, except the one before the first
% \iftrue, but in case some input is "2.5" in place of "2.5pt" they help
% avoiding LaTeX to issue e.g. some "Missing \begin{document}" error
% rather than more apt "Illegal unit of measure (pt inserted)."
\spx@boxes@border@top \@nameuse{spx@#1@border@top}\relax
\spx@boxes@border@right \@nameuse{spx@#1@border@right}\relax
\spx@boxes@border@bottom\@nameuse{spx@#1@border@bottom}\relax
\spx@boxes@border@left \@nameuse{spx@#1@border@left}\relax
\spx@boxes@border \@nameuse{spx@#1@border}\relax
%
\spx@boxes@padding@top \@nameuse{spx@#1@padding@top}\relax
\spx@boxes@padding@right \@nameuse{spx@#1@padding@right}\relax
\spx@boxes@padding@bottom\@nameuse{spx@#1@padding@bottom}\relax
\spx@boxes@padding@left \@nameuse{spx@#1@padding@left}\relax
%
\spx@boxes@radius@topleft \@nameuse{spx@#1@radius@topleft}\relax
\spx@boxes@radius@topright \@nameuse{spx@#1@radius@topright}\relax
\spx@boxes@radius@bottomright \@nameuse{spx@#1@radius@bottomright}\relax
\spx@boxes@radius@bottomleft \@nameuse{spx@#1@radius@bottomleft}\relax
%
\@nameuse{ifspx@#1@withshadow}%
\spx@boxes@withshadowtrue
\spx@boxes@shadow@xoffset \@nameuse{spx@#1@shadow@xoffset}\relax
\spx@boxes@shadow@yoffset \@nameuse{spx@#1@shadow@yoffset}\relax
\else
\spx@boxes@withshadowfalse
\fi
% not nesting in previous to avoid TeX conditional subtleties
\@nameuse{ifspx@#1@insetshadow}%
\spx@boxes@insetshadowtrue
\else
\spx@boxes@insetshadowfalse
\fi
%
\@nameuse{ifspx@#1@withbordercolor}%
\spx@boxes@withbordercolortrue
\sphinxcolorlet{spx@boxes@bordercolor}{#2}%
\else
\spx@boxes@withbordercolorfalse
\fi
%
\@nameuse{ifspx@#1@withbackgroundcolor}%
\spx@boxes@withbackgroundcolortrue
\sphinxcolorlet{spx@boxes@backgroundcolor}{#3}%
\else
\spx@boxes@withbackgroundcolorfalse
\fi
%
\@nameuse{ifspx@#1@withshadowcolor}%
\spx@boxes@withshadowcolortrue
\sphinxcolorlet{spx@boxes@shadowcolor}{#4}%
\else
\spx@boxes@withshadowcolorfalse
\fi
\if1% use rounded boxes only if needed and possible
\ifdim\spx@boxes@radius@topleft >\z@0\fi
\ifdim\spx@boxes@radius@topright >\z@0\fi
\ifdim\spx@boxes@radius@bottomright>\z@0\fi
\ifdim\spx@boxes@radius@bottomleft >\z@0\fi
1\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rectangle}%
\else
\spx@ifpackageloaded@pictiie
{\ifspx@boxes@insetshadow
\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rectangle}%
\else
\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rounded}%
\fi}%
{\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rectangle}}%
\fi
}
%%%%%%%%%%%%%%%%
% \sphinxbox (added at 6.2.0)
%
% For an inline box, possibly rounded.
\newcommand\sphinxbox[1][]{% #1 stands for the options, they are... optional!
\begingroup
\sphinxsetup{#1}% supposedly only "box" related options used here,
% setting other options is possible but will have a priori no effect
\spx@boxes@fcolorbox@setup
{box}
{sphinxboxBorderColor}
{sphinxboxBgColor}
{sphinxboxShadowColor}%
\setbox0\hbox\bgroup\aftergroup\spx@boxes@sphinxbox@a
\let\next=%
}
\def\spx@boxes@sphinxbox@a{\spx@boxes@fcolorbox{\box\z@}\endgroup}
%%%%%%%%%%%%%%%%
% MACROS
%
% \spx@boxes@fcolorbox expands either to \spx@boxes@fcolorbox@rectangle
% or \spx@boxes@fcolorbox@rounded depending on preliminary set-up.
% Let's give it some default fall-back:
% (but preliminary "setup" of \spx@boxes@fcolorbox@rectangle parameters
% is mandatory requirement for it to work)
\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rectangle}
% Then:
%
% - \spx@boxes@fcolorbox@rectangle (4 padding parameters, 4 border widths, 2 shadow widths,
% and three colours: background, border and shadow; same as in CSS styling)
%
% It branches to one of:
% - \spx@boxes@fcolorbox@externalshadow
% - \spx@boxes@fcolorbox@insetshadow (same concept of "inset" as in CSS styling)
%
% - \spx@boxes@fcolorbox@rounded: rounded corners using the picture environment
% and pict2e package for its low-weight interface to PDF graphics operations
% MEMO: we have also successfully tested usage of tcolorbox.sty (its \tcbox) but
% decided to use pict2e.sty for the following reasons:
% 1- PDF build was observed to be an order of magnitude faster,
% 2- the boxes we can do with pict2e appear to be fancy enough,
% almost matching what one can see in HTML renderings,
% 2- orders of magnitude smaller dependency (tcolorbox uses the pgf TeX
% framework), although on Ubuntu it seems texlive-pictures is
% needed which also contains the whole of pgf/TikZ... so this point
% is a bit moot...
% For code-blocks, attachements of caption and continuation hints are done
% exactly as prior to extension of Sphinx via this package, whether the box
% has straight or rounded corners. The vertical space occupied is the same,
% if nothing else is changed (perhaps in future the title itself could be also
% rendered in a rounded box?)
%//// \spx@boxes@fcolorbox@rectangle
% This box will have the same baseline as its argument (which is typeset in
% horizontal mode). It takes into account four border widths parameters, four
% padding parameters, two shadow widths (each possibly negative), and three
% colors: background, border and shadow. Its boundary box takes into account
% all of shadow, border and padding. It is up to the caller to take steps for
% the shadow (and perhaps also border, and padding) to go into margin or stay
% inside the text area, in collaboration with framed.sty. In usage as a
% "FrameCommand" with framed.sty, the argument will already be a collection
% of TeX boxes (and interline glues).
%
% The customization of the various parameters are under responsability of
% the caller, before expansion of \spx@boxes@fcolorbox.
% An extra hook is provided which is used by \sphinxVerbatim@FirstFrameCommand
% from sphinxlatexliterals.sty and others.
\let\spx@boxes@fcolorbox@setuphook\@empty
%
% The parameters are interpreted as they would as CSS properties.
\long\def\spx@boxes@fcolorbox@rectangle#1{%
\hbox\bgroup
\spx@boxes@fcolorbox@setuphook
\setbox\spx@tempboxa
\hbox{\kern\dimexpr\spx@boxes@border@left+\spx@boxes@padding@left\relax
{#1}%
\kern\dimexpr\spx@boxes@padding@right+\spx@boxes@border@right\relax}%
\ht\spx@tempboxa
\dimexpr\ht\spx@tempboxa+\spx@boxes@border@top+\spx@boxes@padding@top\relax
\dp\spx@tempboxa
\dimexpr\dp\spx@tempboxa+\spx@boxes@padding@bottom+\spx@boxes@border@bottom\relax
\ifspx@boxes@insetshadow
\expandafter\spx@boxes@fcolorbox@insetshadow
\else
\expandafter\spx@boxes@fcolorbox@externalshadow
\fi
}
\def\spx@boxes@fcolorbox@externalshadow{%
% reserve space to shadow if on left
\ifspx@boxes@withshadow
\ifdim\spx@boxes@shadow@xoffset<\z@\kern-\spx@boxes@shadow@xoffset\fi
\fi
% BACKGROUND
% draw background and move back to reference point
\ifspx@boxes@withbackgroundcolor
{\color{spx@boxes@backgroundcolor}%
\vrule\@height\ht\spx@tempboxa
\@depth\dp\spx@tempboxa
\@width\wd\spx@tempboxa
\kern-\wd\spx@tempboxa
}%
\fi
% BOX SHADOW
% draw shadow and move back to reference point
\ifspx@boxes@withshadow
\vbox{%
\moveright\spx@boxes@shadow@xoffset
\hbox{\lower\spx@boxes@shadow@yoffset
\vbox{\ifspx@boxes@withshadowcolor\color{spx@boxes@shadowcolor}\fi
\ifdim\spx@boxes@shadow@yoffset<\z@
\hrule\@height-\spx@boxes@shadow@yoffset
\kern\spx@boxes@shadow@yoffset
\fi
\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa{%
\ifdim\spx@boxes@shadow@xoffset<\z@\vrule\@width-\spx@boxes@shadow@xoffset\fi
\hss
\ifdim\spx@boxes@shadow@xoffset>\z@\vrule\@width\spx@boxes@shadow@xoffset\fi
}%
\ht\spx@tempboxb\ht\spx@tempboxa
\dp\spx@tempboxb\dp\spx@tempboxa
\box\spx@tempboxb
\ifdim\spx@boxes@shadow@yoffset>\z@
\kern-\spx@boxes@shadow@yoffset
\hrule\@height\spx@boxes@shadow@yoffset
\fi
\kern-\dp\spx@tempboxa
}% end of \vbox, attention it will have zero depth if yoffset>0
\kern-\wd\spx@tempboxa
\ifdim\spx@boxes@shadow@xoffset>\z@
\kern-\spx@boxes@shadow@xoffset
\fi
}% end of \hbox, attention its depth is only yoffset if yoffset>0
}% end of \vbox
\fi % end of shadow drawing, and we are back to horizontal reference point
% BOX BORDER
\vbox{\ifspx@boxes@withbordercolor\color{spx@boxes@bordercolor}\fi
\hrule\@height\spx@boxes@border@top
\kern-\spx@boxes@border@top
\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa
{\vrule\@width\spx@boxes@border@left
\hss\vrule\@width\spx@boxes@border@right
}%
\ht\spx@tempboxb\ht\spx@tempboxa
\dp\spx@tempboxb\dp\spx@tempboxa
\box\spx@tempboxb
\kern-\spx@boxes@border@bottom
\hrule\@height\spx@boxes@border@bottom
\kern-\dp\spx@tempboxa
}% attention this box has zero depth due to \hrule at bottom
% step back to horizontal reference point
\kern-\wd\spx@tempboxa
% end of border drawing
% CONTENTS
% adjust the total depth to include the bottom shadow
\ifspx@boxes@withshadow
\ifdim\spx@boxes@shadow@yoffset>\z@
\dp\spx@tempboxa\dimexpr\dp\spx@tempboxa+\spx@boxes@shadow@yoffset\relax
\fi
\fi
\box\spx@tempboxa
% include lateral shadow in total width
\ifspx@boxes@withshadow
\ifdim\spx@boxes@shadow@xoffset>\z@\kern\spx@boxes@shadow@xoffset\fi
\fi
\egroup
}
%//// \spx@boxes@fcolorbox@insetshadow
% The parameters are interpreted as in CSS styling.
\def\spx@boxes@fcolorbox@insetshadow{%
% BACKGROUND
% draw background and move back to reference point
\ifspx@boxes@withbackgroundcolor
{\color{spx@boxes@backgroundcolor}%
\vrule\@height\ht\spx@tempboxa
\@depth\dp\spx@tempboxa
\@width\wd\spx@tempboxa
\kern-\wd\spx@tempboxa
}%
\fi
% BOX SHADOW
% draw shadow and move back to reference point
\ifspx@boxes@withshadow
\hbox{\vbox{\ifspx@boxes@withshadowcolor\color{spx@boxes@shadowcolor}\fi
% NOTA BENE
% We deliberately draw shadow partially under an area later covered by frame
% with the idea to avoid anti-aliasing problems but in fact this may be a bad
% idea with border is thin.
% This may need some extra testing with PDF viewers... reports welcome!
\ifdim\spx@boxes@shadow@yoffset>\z@
\hrule\@height\dimexpr\spx@boxes@border@top+\spx@boxes@shadow@yoffset\relax
\kern-\spx@boxes@shadow@yoffset
\kern-\spx@boxes@border@top
\fi
\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa{%
\ifdim\spx@boxes@shadow@xoffset>\z@
\vrule\@width\dimexpr\spx@boxes@border@left+\spx@boxes@shadow@xoffset\relax\fi
\hss
\ifdim\spx@boxes@shadow@xoffset<\z@
\vrule\@width\dimexpr-\spx@boxes@shadow@xoffset+\spx@boxes@border@right\relax\fi
}%
\ht\spx@tempboxb\ht\spx@tempboxa
\dp\spx@tempboxb\dp\spx@tempboxa
\box\spx@tempboxb
\ifdim\spx@boxes@shadow@yoffset<\z@
\kern\spx@boxes@shadow@yoffset
\kern-\spx@boxes@border@bottom
\hrule\@height\dimexpr-\spx@boxes@shadow@yoffset+\spx@boxes@border@bottom\relax
\fi
\kern-\dp\spx@tempboxa
}% end of \vbox, attention it will have zero depth if yoffset<0
\kern-\wd\spx@tempboxa
}% end of \hbox, attention its depth is only |yoffset| if yoffset<0
\fi % end of inset shadow drawing, and we are back to horizontal reference point
% BOX BORDER
\vbox{\ifspx@boxes@withbordercolor\color{spx@boxes@bordercolor}\fi
\hrule\@height\spx@boxes@border@top
\kern-\spx@boxes@border@top
\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa
{\vrule\@width\spx@boxes@border@left
\hss\vrule\@width\spx@boxes@border@right
}%
\ht\spx@tempboxb\ht\spx@tempboxa
\dp\spx@tempboxb\dp\spx@tempboxa
\box\spx@tempboxb
\kern-\spx@boxes@border@bottom
\hrule\@height\spx@boxes@border@bottom
\kern-\dp\spx@tempboxa
}% attention this box has zero depth due to \hrule at bottom
% step back to horizontal reference point
\kern-\wd\spx@tempboxa
% end of border drawing
% CONTENTS
\box\spx@tempboxa
\egroup
}
%%%%%%%%
% \spx@boxes@fcolorbox@rounded
%
% Various radii but only one border-width parameter.
% Shadow too.
% wrappers for pict2e usage if old
% Better not to copy over 2020 pict2e definitions in case
% something internal changes
% However our wrappers will work ONLY with dimensional inputs
% No need to pre-expand the arguments
% Braces in case the expression uses parentheses
\def\spx@moveto(#1,#2){\moveto({\strip@pt\dimexpr#1\relax},{\strip@pt\dimexpr#2\relax})}
\def\spx@lineto(#1,#2){\lineto({\strip@pt\dimexpr#1\relax},{\strip@pt\dimexpr#2\relax})}
% attention here the [N] becomes mandatory
\def\spx@circlearc[#1]#2#3#4%#5#6
{\circlearc[#1]{\strip@pt\dimexpr#2\relax}%
{\strip@pt\dimexpr#3\relax}%
{\strip@pt\dimexpr#4\relax}}
% This macro will when executed in a picture environment prepare a path which
% is both used for filling backround color and stroking border
% The coordinate origin in the LaTeX picture environment will be at half the
% border width (d/2, d/2), d = constant border width
\def\spx@boxes@borderpath{%
\spx@moveto(\spx@boxes@radius@bottomleft,\z@)% \z@ not 0 as our \spx@moveto is quite dumb
\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@bottomright,\z@)%
\spx@circlearc[2]{\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@bottomright}%
{\spx@boxes@radius@bottomright}%
{\spx@boxes@radius@bottomright}{-90}{0}%
\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border,%
\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright)%
\spx@circlearc[2]{\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright}
{\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright}%
{\spx@boxes@radius@topright}{0}{90}%
\spx@lineto(\spx@boxes@radius@topleft,\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border)%
\spx@circlearc[2]{\spx@boxes@radius@topleft}%
{\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topleft}%
{\spx@boxes@radius@topleft}{90}{180}%
\spx@lineto(\z@,\spx@boxes@radius@bottomleft)%
\spx@circlearc[2]{\spx@boxes@radius@bottomleft}%
{\spx@boxes@radius@bottomleft}%
{\spx@boxes@radius@bottomleft}{180}{270}%
}% end of definition of \spx@boxes@borderpath
\def\spx@boxes@borderpath@opentop{%
\spx@moveto(\z@,\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border)%
\spx@lineto(\z@,\spx@boxes@radius@bottomleft)%
\spx@circlearc[2]{\spx@boxes@radius@bottomleft}%
{\spx@boxes@radius@bottomleft}%
{\spx@boxes@radius@bottomleft}{180}{270}%
\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@bottomright,\z@)%
\spx@circlearc[2]{\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@bottomright}%
{\spx@boxes@radius@bottomright}%
{\spx@boxes@radius@bottomright}{-90}{0}%
\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border,%
\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border)%
}% end of definition of \spx@boxes@borderpath@opentop
\def\spx@boxes@borderpath@openbottom{%
\spx@moveto(\wd\spx@tempboxa-\spx@boxes@border,\z@)%
\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border,%
\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright)%
\spx@circlearc[2]{\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright}
{\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright}%
{\spx@boxes@radius@topright}{0}{90}%
\spx@lineto(\spx@boxes@radius@topleft,\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border)%
\spx@circlearc[2]{\spx@boxes@radius@topleft}%
{\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topleft}%
{\spx@boxes@radius@topleft}{90}{180}%
\spx@lineto(\z@,\z@)%
}% end of definition of \spx@boxes@borderpath@openbottom
\def\spx@boxes@borderpath@openboth{%
\spx@moveto(\wd\spx@tempboxa-\spx@boxes@border,\z@)%
\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border,%
\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border)%
\spx@moveto(\z@,\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border)%
\spx@lineto(\z@,\z@)%
}% end of definition of \spx@boxes@borderpath@openboth
\long\def\spx@boxes@fcolorbox@rounded #1{%
\hbox{%
\spx@boxes@fcolorbox@setuphook
% reserve space to shadow if on left
\ifspx@boxes@withshadow
\ifdim\spx@boxes@shadow@xoffset<\z@\kern-\spx@boxes@shadow@xoffset\fi
\fi
\vbox{%
% adjust vertical bbox
\ifspx@boxes@withshadow
\ifdim\spx@boxes@shadow@yoffset<\z@
\kern-\spx@boxes@shadow@yoffset
\fi
\fi
\setlength{\unitlength}{1pt}%
\setbox\spx@tempboxa
\hbox{\kern\dimexpr\spx@boxes@border+\spx@boxes@padding@left\relax
{#1}%
\kern\dimexpr\spx@boxes@padding@right+\spx@boxes@border\relax}%
\ht\spx@tempboxa
\dimexpr\ht\spx@tempboxa+\spx@boxes@border+\spx@boxes@padding@top\relax
\dp\spx@tempboxa
\dimexpr\dp\spx@tempboxa+\spx@boxes@padding@bottom+\spx@boxes@border\relax
\hbox{%
\begin{picture}%
% \strip@pt\dimexpr to work around "old" LaTeX picture limitation
% (we could use the "picture" package, this would add another dependency)
(\strip@pt\wd\spx@tempboxa,\strip@pt\dimexpr\ht\spx@tempboxa+\dp\spx@tempboxa\relax)%
(\strip@pt\dimexpr-.5\spx@boxes@border\relax,\strip@pt\dimexpr-.5\spx@boxes@border\relax)%
\ifspx@boxes@withshadow
{% <-- added scope limitation at 6.2.0, as shadowcolor was leaking to border if
% bordercolor not explicitly set
% Should an \else branch be added with \normalcolor?
\ifspx@boxes@withshadowcolor\color{spx@boxes@shadowcolor}\fi
\put(\strip@pt\dimexpr\ifdim\spx@boxes@shadow@xoffset<\z@-\fi
0.5\spx@boxes@border+\spx@boxes@shadow@xoffset\relax,%
\strip@pt\dimexpr\ifdim\spx@boxes@shadow@yoffset<\z@\else-\fi
0.5\spx@boxes@border-\spx@boxes@shadow@yoffset\relax)
{\spx@boxes@borderpath\fillpath}%
{\ifspx@boxes@withbackgroundcolor\else
\pagecolor% was using \color{white} prior to 6.2.0
\spx@boxes@borderpath\fillpath
\fi}%
}%
\fi
{\ifspx@boxes@withbackgroundcolor
\color{spx@boxes@backgroundcolor}%
\spx@boxes@borderpath\fillpath
\fi}%
\ifdim\spx@boxes@border>\z@
% even with \spx@boxes@border set to 0pt as done if verbatimwithframe=false
% stroke will produce a visible contour, so we exclude doing it in that case
\ifspx@boxes@withbordercolor
\color{spx@boxes@bordercolor}%
% Should an \else branch use \normalcolor?
\fi
\linethickness{\spx@boxes@border}%
\ifdim\spx@boxes@border@top=\z@
\ifdim\spx@boxes@border@bottom=\z@
\spx@boxes@borderpath@openboth
\else \spx@boxes@borderpath@opentop
\fi
\else
\ifdim\spx@boxes@border@bottom=\z@
\spx@boxes@borderpath@openbottom
\else\spx@boxes@borderpath\strokepath
\fi\fi
\strokepath
\fi
\end{picture}}% end of picture \hbox in \vbox
% back-up vertically for outputting the contents
\kern-\dimexpr\ht\spx@tempboxa+\dp\spx@tempboxa\relax
% adjust vertical bbox
\ifspx@boxes@withshadow
\ifdim\spx@boxes@shadow@yoffset>\z@
\dp\spx@tempboxa\dimexpr\dp\spx@tempboxa+\spx@boxes@shadow@yoffset\relax
\fi
\fi
% inhibit TeX's "line skip" adjustment when piling up hboxes in a vbox
\nointerlineskip
\box\spx@tempboxa
}% end of \vbox
% include lateral shadow in total width
\ifspx@boxes@withshadow
\ifdim\spx@boxes@shadow@xoffset>\z@\kern\spx@boxes@shadow@xoffset\fi
\fi
}% end of \hbox
}%
\endinput