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424 lines
18 KiB
424 lines
18 KiB
8 months ago
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%% COLOURED BOXES
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%
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% change this info string if making any custom modification
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\ProvidesPackage{sphinxpackageboxes}[2022/07/04 v5.1.0 advanced colored boxes]
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% Optionally executes \RequirePackage for:
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%
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% - pict2e. Ideally we would like to use the v0.4a 2020/08/16 release of this
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% package as it allows dimensional arguments to its \moveto, \lineto, etc...
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% Or we could use extra package "picture". We opt for custom wrappers
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% \spx@moveto, \spx@lineto, ..., working with old versions.
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% Provides box registers \spx@tempboxa, \spx@tempboxb usable in other places
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\newbox\spx@tempboxa
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\newbox\spx@tempboxb
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% Internal dimens, conditionals, and colour parameters to be configured
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% by callers in "setup" macros
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\newif\ifspx@boxes@withshadow
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\newif\ifspx@boxes@insetshadow
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\newif\ifspx@boxes@withbackgroundcolor
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\newif\ifspx@boxes@withshadowcolor
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\newif\ifspx@boxes@withbordercolor
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%
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\newdimen\spx@boxes@border
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\newdimen\spx@boxes@border@top
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\newdimen\spx@boxes@border@right
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\newdimen\spx@boxes@border@bottom
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\newdimen\spx@boxes@border@left
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%
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\newdimen\spx@boxes@padding@top
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\newdimen\spx@boxes@padding@right
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\newdimen\spx@boxes@padding@bottom
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\newdimen\spx@boxes@padding@left
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%
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\newdimen\spx@boxes@shadow@xoffset
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\newdimen\spx@boxes@shadow@yoffset
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%
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\newdimen\spx@boxes@radius@topleft % only circular arcs, x-radius same as y-radius
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\newdimen\spx@boxes@radius@topright
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\newdimen\spx@boxes@radius@bottomright
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\newdimen\spx@boxes@radius@bottomleft
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%
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% These colours have to be defined appropriately by the callers:
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% spx@boxes@bordercolor
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% spx@boxes@backgroundcolor
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% spx@boxes@shadowcolor
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%%%%%%%%%%%%%%%%
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% MACROS
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%
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% - \spx@boxes@fcolorbox (4 padding parameters, 4 border widths, 2 shadow widths,
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% and three colours: background, border and shadow; same as in CSS styling)
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%
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% - \spx@boxes@fcolorbox@insetshadow (same as in CSS styling)
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%
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% - \spx@boxes@fcolorbox@rounded: rounded corners using the picture environment
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% and pict2e package for its low-weight interface to PDF graphics operations
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% MEMO: we have also successfully tested usage of tcolorbox.sty (its \tcbox) but
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% decided to use pict2e.sty for the following reasons:
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% 1- PDF build was observed to be an order of magnitude faster,
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% 2- the boxes we can do with pict2e appear to be fancy enough,
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% almost matching what one can see in HTML renderings,
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% 2- orders of magnitude smaller dependency (tcolorbox uses the pgf TeX
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% framework), although on Ubuntu it seems texlive-pictures is
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% needed which also contains the whole of pgf/TikZ... so this point
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% is a bit moot...
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% For code-blocks, attachements of caption and continuation hints are done
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% exactly as prior to extension of Sphinx via this package, whether the box
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% has straight or rounded corners. The vertical space occupied is the same,
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% if nothing else is changed (perhaps in future the title itself could be also
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% rendered in a rounded box?)
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%//// \spx@boxes@fcolorbox
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% This box will have the same baseline as its argument (which is typeset in
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% horizontal mode). It takes into account four border widths parameters, four
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% padding parameters, two shadow widths (each possibly negative), and three
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% colors: background, border and shadow. Its boundary box takes into account
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% all of shadow, border and padding. It is up to the caller to take steps for
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% the shadow (and perhaps also border, and padding) to go into margin or stay
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% inside the text area, in collaboration with framed.sty. In usage as a
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% "FrameCommand" with framed.sty, the argument will already be a collection
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% of TeX boxes (and interline glues).
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%
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% The customization of the various parameters are under responsability of
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% the caller, before exapnsion of \spx@boxes@fcolorbox.
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% An extra hook is provided:
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\let\spx@boxes@fcolorbox@setuphook\@empty
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%
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% The parameters are interpreted as they would as CSS properties.
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% For inset shadows see separate \spx@boxes@fcolorbox@insetshadow.
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\long\def\spx@boxes@fcolorbox#1{%
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\hbox\bgroup
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\spx@boxes@fcolorbox@setuphook
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\setbox\spx@tempboxa
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\hbox{\kern\dimexpr\spx@boxes@border@left+\spx@boxes@padding@left\relax
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{#1}%
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\kern\dimexpr\spx@boxes@padding@right+\spx@boxes@border@right\relax}%
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\ht\spx@tempboxa
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\dimexpr\ht\spx@tempboxa+\spx@boxes@border@top+\spx@boxes@padding@top\relax
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\dp\spx@tempboxa
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\dimexpr\dp\spx@tempboxa+\spx@boxes@padding@bottom+\spx@boxes@border@bottom\relax
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\ifspx@boxes@insetshadow
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\expandafter\spx@boxes@fcolorbox@insetshadow
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\else
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\expandafter\spx@boxes@fcolorbox@externalshadow
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\fi
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}
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\def\spx@boxes@fcolorbox@externalshadow{%
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% reserve space to shadow if on left
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\ifspx@boxes@withshadow
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\ifdim\spx@boxes@shadow@xoffset<\z@\kern-\spx@boxes@shadow@xoffset\fi
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\fi
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% BACKGROUND
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% draw background and move back to reference point
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\ifspx@boxes@withbackgroundcolor
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{\color{spx@boxes@backgroundcolor}%
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\vrule\@height\ht\spx@tempboxa
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\@depth\dp\spx@tempboxa
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\@width\wd\spx@tempboxa
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\kern-\wd\spx@tempboxa
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}%
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\fi
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% BOX SHADOW
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% draw shadow and move back to reference point
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\ifspx@boxes@withshadow
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\vbox{%
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\moveright\spx@boxes@shadow@xoffset
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\hbox{\lower\spx@boxes@shadow@yoffset
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\vbox{\ifspx@boxes@withshadowcolor\color{spx@boxes@shadowcolor}\fi
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\ifdim\spx@boxes@shadow@yoffset<\z@
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\hrule\@height-\spx@boxes@shadow@yoffset
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\kern\spx@boxes@shadow@yoffset
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\fi
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\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa{%
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\ifdim\spx@boxes@shadow@xoffset<\z@\vrule\@width-\spx@boxes@shadow@xoffset\fi
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\hss
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\ifdim\spx@boxes@shadow@xoffset>\z@\vrule\@width\spx@boxes@shadow@xoffset\fi
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}%
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\ht\spx@tempboxb\ht\spx@tempboxa
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\dp\spx@tempboxb\dp\spx@tempboxa
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\box\spx@tempboxb
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\ifdim\spx@boxes@shadow@yoffset>\z@
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\kern-\spx@boxes@shadow@yoffset
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\hrule\@height\spx@boxes@shadow@yoffset
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\fi
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\kern-\dp\spx@tempboxa
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}% end of \vbox, attention it will have zero depth if yoffset>0
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\kern-\wd\spx@tempboxa
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\ifdim\spx@boxes@shadow@xoffset>\z@
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\kern-\spx@boxes@shadow@xoffset
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\fi
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}% end of \hbox, attention its depth is only yoffset if yoffset>0
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}% end of \vbox
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\fi % end of shadow drawing, and we are back to horizontal reference point
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% BOX BORDER
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\vbox{\ifspx@boxes@withbordercolor\color{spx@boxes@bordercolor}\fi
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\hrule\@height\spx@boxes@border@top
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\kern-\spx@boxes@border@top
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\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa
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{\vrule\@width\spx@boxes@border@left
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\hss\vrule\@width\spx@boxes@border@right
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}%
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\ht\spx@tempboxb\ht\spx@tempboxa
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\dp\spx@tempboxb\dp\spx@tempboxa
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\box\spx@tempboxb
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\kern-\spx@boxes@border@bottom
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\hrule\@height\spx@boxes@border@bottom
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\kern-\dp\spx@tempboxa
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}% attention this box has zero depth due to \hrule at bottom
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% step back to horizontal reference point
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\kern-\wd\spx@tempboxa
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% end of border drawing
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% CONTENTS
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% adjust the total depth to include the bottom shadow
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\ifspx@boxes@withshadow
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\ifdim\spx@boxes@shadow@yoffset>\z@
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\dp\spx@tempboxa\dimexpr\dp\spx@tempboxa+\spx@boxes@shadow@yoffset\relax
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\fi
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\fi
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\box\spx@tempboxa
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% include lateral shadow in total width
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\ifspx@boxes@withshadow
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\ifdim\spx@boxes@shadow@xoffset>\z@\kern\spx@boxes@shadow@xoffset\fi
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\fi
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\egroup
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}
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%//// \spx@boxes@fcolorbox@insetshadow
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% The parameters are interpreted as in CSS styling.
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\def\spx@boxes@fcolorbox@insetshadow{%
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% BACKGROUND
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% draw background and move back to reference point
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\ifspx@boxes@withbackgroundcolor
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{\color{spx@boxes@backgroundcolor}%
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\vrule\@height\ht\spx@tempboxa
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\@depth\dp\spx@tempboxa
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\@width\wd\spx@tempboxa
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\kern-\wd\spx@tempboxa
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}%
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\fi
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% BOX SHADOW
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% draw shadow and move back to reference point
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\ifspx@boxes@withshadow
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\hbox{\vbox{\ifspx@boxes@withshadowcolor\color{spx@boxes@shadowcolor}\fi
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% NOTA BENE
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% We deliberately draw shadow partially under an area later covered by frame
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% with the idea to avoid anti-aliasing problems but in fact this may be a bad
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% idea with border is thin.
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% This may need some extra testing with PDF viewers... reports welcome!
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\ifdim\spx@boxes@shadow@yoffset>\z@
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\hrule\@height\dimexpr\spx@boxes@border@top+\spx@boxes@shadow@yoffset\relax
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\kern-\spx@boxes@shadow@yoffset
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\kern-\spx@boxes@border@top
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\fi
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\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa{%
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\ifdim\spx@boxes@shadow@xoffset>\z@
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\vrule\@width\dimexpr\spx@boxes@border@left+\spx@boxes@shadow@xoffset\relax\fi
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\hss
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\ifdim\spx@boxes@shadow@xoffset<\z@
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\vrule\@width\dimexpr-\spx@boxes@shadow@xoffset+\spx@boxes@border@right\relax\fi
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}%
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\ht\spx@tempboxb\ht\spx@tempboxa
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\dp\spx@tempboxb\dp\spx@tempboxa
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\box\spx@tempboxb
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\ifdim\spx@boxes@shadow@yoffset<\z@
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\kern\spx@boxes@shadow@yoffset
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\kern-\spx@boxes@border@bottom
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\hrule\@height\dimexpr-\spx@boxes@shadow@yoffset+\spx@boxes@border@bottom\relax
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\fi
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\kern-\dp\spx@tempboxa
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}% end of \vbox, attention it will have zero depth if yoffset<0
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\kern-\wd\spx@tempboxa
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}% end of \hbox, attention its depth is only |yoffset| if yoffset<0
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\fi % end of inset shadow drawing, and we are back to horizontal reference point
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% BOX BORDER
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\vbox{\ifspx@boxes@withbordercolor\color{spx@boxes@bordercolor}\fi
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\hrule\@height\spx@boxes@border@top
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\kern-\spx@boxes@border@top
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\setbox\spx@tempboxb\hb@xt@\wd\spx@tempboxa
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{\vrule\@width\spx@boxes@border@left
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\hss\vrule\@width\spx@boxes@border@right
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}%
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\ht\spx@tempboxb\ht\spx@tempboxa
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\dp\spx@tempboxb\dp\spx@tempboxa
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\box\spx@tempboxb
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\kern-\spx@boxes@border@bottom
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\hrule\@height\spx@boxes@border@bottom
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\kern-\dp\spx@tempboxa
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}% attention this box has zero depth due to \hrule at bottom
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% step back to horizontal reference point
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\kern-\wd\spx@tempboxa
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% end of border drawing
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% CONTENTS
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\box\spx@tempboxa
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\egroup
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}
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%%%%%%%%
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% \spx@boxes@fcolorbox@rounded
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%
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% Various radii but only one border-width parameter.
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% Shadow too.
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% wrappers for pict2e usage if old
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% Better not to copy over 2020 pict2e definitions in case
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% something internal changes
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% However our wrappers will work ONLY with dimensional inputs
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% No need to pre-expand the arguments
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% Braces in case the expression uses parentheses
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\def\spx@moveto(#1,#2){\moveto({\strip@pt\dimexpr#1\relax},{\strip@pt\dimexpr#2\relax})}
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\def\spx@lineto(#1,#2){\lineto({\strip@pt\dimexpr#1\relax},{\strip@pt\dimexpr#2\relax})}
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% attention here the [N] becomes mandatory
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\def\spx@circlearc[#1]#2#3#4%#5#6
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{\circlearc[#1]{\strip@pt\dimexpr#2\relax}%
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{\strip@pt\dimexpr#3\relax}%
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{\strip@pt\dimexpr#4\relax}}
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% This macro will when executed in a picture environment prepare a path which
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% is both used for filling backround color and stroking border
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% The coordinate origin in the LaTeX picture environment will be at half the
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% border width (d/2, d/2), d = constant border width
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\def\spx@boxes@borderpath{%
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\spx@moveto(\spx@boxes@radius@bottomleft,\z@)% \z@ not 0 as our \spx@moveto is quite dumb
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\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@bottomright,\z@)%
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\spx@circlearc[2]{\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@bottomright}%
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{\spx@boxes@radius@bottomright}%
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{\spx@boxes@radius@bottomright}{-90}{0}%
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\spx@lineto(\wd\spx@tempboxa-\spx@boxes@border,%
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\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright)%
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\spx@circlearc[2]{\wd\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright}
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{\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topright}%
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{\spx@boxes@radius@topright}{0}{90}%
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\spx@lineto(\spx@boxes@radius@topleft,\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border)%
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\spx@circlearc[2]{\spx@boxes@radius@topleft}%
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{\ht\spx@tempboxa+\dp\spx@tempboxa-\spx@boxes@border-\spx@boxes@radius@topleft}%
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{\spx@boxes@radius@topleft}{90}{180}%
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\spx@lineto(\z@,\spx@boxes@radius@bottomleft)%
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\spx@circlearc[2]{\spx@boxes@radius@bottomleft}%
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{\spx@boxes@radius@bottomleft}%
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{\spx@boxes@radius@bottomleft}{180}{270}%
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}% 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
|
||
|
|
\color{spx@boxes@shadowcolor}%
|
||
|
|
\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
|
||
|
|
\color{white}% or rather try to use page color?
|
||
|
|
\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}%
|
||
|
|
\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
|
||
|
|
\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
|