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Merge pull request #10639 from jfbu/latex_roundedboxes
LaTeX: optional rounded corners for framing of code-blocks
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| Original file line number | Diff line number | Diff line change |
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| %% COLORED BOXES | ||
| % | ||
| % change this info string if making any custom modification | ||
| \ProvidesPackage{sphinxpackageboxes}[2022/07/04 v5.1.0 advanced colored boxes] | ||
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| % Currently, this file only provides a replacement to the \spx@verb@fcolorbox | ||
| % of sphinxlatexliterals.sty which will draw boxes with a frame having | ||
| % rounded corners, and a background color. | ||
| % | ||
| % It needs \sphinxverbatimsep, \sphinxverbatimborder and a new parameter | ||
| % \sphinxverbatimradius | ||
| % | ||
| % Executes \RequirePackage for: | ||
| % | ||
| % - pict2e. Ideally we would need a recent version of this package which | ||
| % allows dimensional arguments to its \moveto, \lineto, etc... | ||
| % but we add ourselves some wrapper to facilitate the usage. | ||
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| % MEMO: we have also successfully tested usage of tcolorbox's \tcbox but | ||
| % decided to use pict2e.sty for the following reasons: | ||
| % 1- an order of magnitude faster for what we want to do, | ||
| % 2- orders of magnitude smaller dependency (tcolorbox uses the pgf TeX | ||
| % framework) | ||
| % 3- possibility to accomplish already quite fancy boxes with pict2e | ||
| % (and the additional coding as contributed here). | ||
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| % In this first installment, the caption and continuation hints of code-blocks | ||
| % are done exactly as formerly; only difference is in the rounded corrners. | ||
| % The space occupied is same, if nothing else is changed. | ||
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| \IfFileExists{pict2e.sty} | ||
| {\RequirePackage{pict2e}} | ||
| {\PackageWarningNoLine{sphinx}{% | ||
| The package pict2e is required for rounded boxes.\MessageBreak | ||
| It does not seem to be available on your system.\MessageBreak | ||
| The verbatimradius setting will thus be ignored}% | ||
| \AtEndDocument{\PackageWarningNoLine{sphinx}{% | ||
| I issued a warning which may have gotten lost in the\MessageBreak | ||
| gigantic console output: pict2e.sty was not found,\MessageBreak | ||
| and verbatimradius has been ignored}}\endinput} | ||
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| % First we define some wrapper to be able to use arguments being (only) | ||
| % dimensions or dimensional expressions. The \unitlength will always be 1pt. | ||
| \def\spx@moveto(#1,#2)% | ||
| {\moveto(\strip@pt\dimexpr#1,\strip@pt\dimexpr#2)} | ||
| \def\spx@lineto(#1,#2)% | ||
| {\lineto(\strip@pt\dimexpr#1,\strip@pt\dimexpr#2)} | ||
| % attention we use here [2] always; and there are two more mandatory | ||
| % arguments, angles, we don't need to worry about them here. | ||
| \def\spx@circlearc#1#2#3{\circlearc[2]% | ||
| {\strip@pt\dimexpr#1}{\strip@pt\dimexpr#2}{\strip@pt\dimexpr#3}% | ||
| } | ||
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| % TODO: add top right bottom left padding possibilities. | ||
| \long\def\spx@verb@fcolorbox #1#2#3{% | ||
| % Prepare a box with the contents and reserved space for framing. | ||
| \setbox\tw@\hbox{\kern\dimexpr\sphinxverbatimborder+\sphinxverbatimsep\relax | ||
| {#3}\kern\dimexpr\sphinxverbatimborder+\sphinxverbatimsep\relax}% | ||
| \ht\tw@ \dimexpr\ht\tw@+\sphinxverbatimsep+\sphinxverbatimborder\relax | ||
| \dp\tw@ \dimexpr\dp\tw@+\sphinxverbatimsep+\sphinxverbatimborder\relax | ||
| \vbox{% | ||
| % Prepare a macro for path to be inserted in a picture environment for stroke | ||
| % and fill; the path will be redefined for each of fill or stroke. This macro | ||
| % does nothing yet. | ||
| \def\spx@dopath{% | ||
| \spx@moveto(\sphinxverbatimradius,\z@)% \z@ not 0 as our \spx@moveto is quite dumb | ||
| \spx@lineto(\wd\tw@-\sphinxverbatimborder-\sphinxverbatimradius,\z@)% | ||
| \spx@circlearc{\wd\tw@-\sphinxverbatimborder-\sphinxverbatimradius}% | ||
| {\sphinxverbatimradius}% | ||
| {\sphinxverbatimradius}{-90}{0}% | ||
| \spx@lineto(\wd\tw@-\sphinxverbatimborder,\ht\tw@+\dp\tw@-\sphinxverbatimborder-\sphinxverbatimradius)% | ||
| \spx@circlearc{\wd\tw@-\sphinxverbatimborder-\sphinxverbatimradius} | ||
| {\ht\tw@+\dp\tw@-\sphinxverbatimborder-\sphinxverbatimradius}% | ||
| {\sphinxverbatimradius}{0}{90}% | ||
| \spx@lineto(\sphinxverbatimradius,\ht\tw@+\dp\tw@-\sphinxverbatimborder)% | ||
| \spx@circlearc{\sphinxverbatimradius}% | ||
| {\ht\tw@+\dp\tw@-\sphinxverbatimborder-\sphinxverbatimradius}% | ||
| {\sphinxverbatimradius}{90}{180}% | ||
| \spx@lineto(\z@,\sphinxverbatimradius)% | ||
| \spx@circlearc{\sphinxverbatimradius}{\sphinxverbatimradius}{\sphinxverbatimradius}{180}{270}% | ||
| }% end of definition of \spx@dopath | ||
| % | ||
| #1% continuation hint attached above frame | ||
| % there will be a small "\lineskip" space here from TeX | ||
| % draw frame border _latest_ to avoid pdf viewer issue | ||
| % be careful not to cause "color push + contents + color pop" | ||
| % MEMO: when pict2e doth a path stroke, the path is in the middle of the line | ||
| % width, i.e. the line extends by half its width to the exterior of the filled | ||
| % path. This explains some 0.5 things below. | ||
| \hbox{\setlength{\unitlength}{1pt}% attention to space token here | ||
| % work around for "old" LaTeX (we could use the "picture" package, this | ||
| % would add another dependency) | ||
| \begin{picture}% | ||
| (\strip@pt\wd\tw@,\strip@pt\dimexpr\ht\tw@+\dp\tw@)% | ||
| (\strip@pt\dimexpr-.5\sphinxverbatimborder,\strip@pt\dimexpr-.5\sphinxverbatimborder)% | ||
| \color{VerbatimColor}% color for background | ||
| \spx@dopath\fillpath | ||
| \color{VerbatimBorderColor}% color for border | ||
| \ifspx@opt@verbatimwithframe % even with \sphinxverbatimborder set to 0pt, the | ||
| % stroke will produce a visible contour, so we | ||
| % must explicitly exclude doing it. | ||
| \linethickness{\sphinxverbatimborder}% | ||
| \spx@dopath\strokepath | ||
| \fi | ||
| \end{picture}}% | ||
| % now the contents | ||
| \kern-\dimexpr\ht\tw@+\dp\tw@\relax | ||
| \copy\tw@ % attention that #2 will need \wd\tw@ | ||
| \nointerlineskip | ||
| % TODO: add some \lineskip glue here, this is all in a \vbox so can't split | ||
| #2% continuation hint attached below frame | ||
| }% end of \vbox | ||
| }% | ||
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| \endinput |