117 lines
4.9 KiB
TeX
117 lines
4.9 KiB
TeX
%% TOPIC AND CONTENTS BOXES
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%
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% change this info string if making any custom modification
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\ProvidesFile{sphinxlatexshadowbox.sty}[2023/03/19 sphinxShadowBox]
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% Provides support for this output mark-up from Sphinx latex writer:
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%
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% - sphinxShadowBox (environment)
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%
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% Dependencies (they do not need to be defined at time of loading):
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%
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% - of course the various colour and dimension options handled via sphinx.sty
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% - dimension register \spx@image@maxheight from sphinxlatexgraphics.sty
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% - \savenotes/\spewnotes from sphinxpackagefootnote
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% - \ifspx@inframed defined in sphinx.sty
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%
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% Requires:
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\RequirePackage{framed}
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\RequirePackage{sphinxpackageboxes}
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% At 5.1.0 the code formerly here in a definition of \spx@ShadowFBox has been
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% refactored to hand over to a more powerful \spx@boxes@fcolorbox provided by
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% file sphinxpackageboxes.sty, it can draw rounded corners and add a background
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% color.
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% At 6.2.0, \spx@ShadowFBox is so much simplified that it is now not
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% separately defined but directly incorporated into the \FrameCommand
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% definition done by sphinxShadowBox environment below.
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% Use framed.sty \MakeFramed/\endMakeFramed to allow page breaks for topic
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% boxes. Originally Sphinx used \shadowbox from fancybox.sty but it did not
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% allow pagebreaks (which was problematic for "contents" directive if there
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% are many subsections).
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%
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% Docutils does not allow topic to be nested within topics or other body
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% elements. But the LaTeX code here does allow it:
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%
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% - a topic inside another topic would be rendered in a minipage (thus not
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% allowing pagebreaks). Its external frame would adapt perfectly to
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% the *current (smaller) width for text*.
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%
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% - a topic inside (nested) lists or quote environments would have its frame
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% take the *full width* of the page, but its text contents on the other hand
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% would obey exactly the current indentation plus inner separation. This is
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% in contrast with the framing used for literal blocks, also based, but in a
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% more sophisticated way on usage of \MakeFramed/\endMakeFramed, and
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% adjusting to current text indentation.
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\newenvironment{sphinxShadowBox}
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{%
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\spx@boxes@fcolorbox@setup{topic}%
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% we will use the dimen registers from sphinxpackageboxes.sty which now hold
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% the values from options related to topic/contents
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% MEMO: \spx@boxes@fcolorbox creates an \hbox but does not quit vertical
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% mode; but in context of framed.sty's \FrameCommand TeX is already
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% in restricted horizontal mode, so no need for a \leavevmode here.
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\def\FrameCommand {\spx@boxes@fcolorbox}%
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% 6.2.0 adds support for div.topic_box-decoration-break=slice.
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% (it is yet undecided if slice style should inhibit a bottom shadow)
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\ifspx@topic@border@open
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\def\FirstFrameCommand
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{\spx@boxes@fcolorbox@setup@openbottom\FrameCommand}%
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\def\MidFrameCommand
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{\spx@boxes@fcolorbox@setup@openboth \FrameCommand}%
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\def\LastFrameCommand
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{\spx@boxes@fcolorbox@setup@opentop \FrameCommand}%
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\fi
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\advance\spx@image@maxheight
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-\dimexpr\spx@boxes@border@top+\spx@boxes@border@bottom
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+\spx@boxes@padding@top+\spx@boxes@padding@bottom
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+\ifdim\spx@boxes@shadow@yoffset<\z@-\fi\spx@boxes@shadow@yoffset
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+\baselineskip\relax
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% configure framed.sty not to add extra vertical spacing
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\ltx@ifundefined{OuterFrameSep}{}{\OuterFrameSep\z@skip}%
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% the \trivlist will add the vertical spacing on top and bottom which is
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% typical of center environment as used in Sphinx <= 1.4.1
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% the \noindent has the effet of an extra blank line on top, to
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% imitate closely the layout from Sphinx <= 1.4.1; the \FrameHeightAdjust
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% will put top part of frame on this baseline.
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\def\FrameHeightAdjust {\baselineskip}%
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% use package footnote to handle footnotes
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\savenotes
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\trivlist\item\noindent
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% use a minipage if we are already inside a framed environment
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\ifspx@inframed\begin{minipage}{\linewidth}\fi
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\MakeFramed {\spx@inframedtrue
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% framed.sty puts into "\width" the added width (padding+border widths)
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% adjust \hsize to what the contents must use
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\advance\hsize-\width
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% adjust LaTeX parameters to behave properly in indented/quoted contexts
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\FrameRestore
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% typeset the contents as in a minipage (Sphinx <= 1.4.1 used a minipage and
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% itemize/enumerate are therein typeset more tightly, we want to keep
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% that). We copy-paste from LaTeX source code but don't do a real minipage.
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\@pboxswfalse
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\let\@listdepth\@mplistdepth \@mplistdepth\z@
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\@minipagerestore
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\@setminipage
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}%
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\color@begingroup % workaround upstream framed.sty bug
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\ifspx@topic@withtextcolor
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\color{sphinxtopicTextColor}%
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\fi
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\spx@topic@TeXextras
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}%
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{% insert the "endminipage" code
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\par\unskip
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\color@endgroup % matches the \color@begingroup
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\@minipagefalse
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\endMakeFramed
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\ifspx@inframed\end{minipage}\fi
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\endtrivlist
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% output the stored footnotes
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\spewnotes
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}
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\endinput
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