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%% GRAPHICS
%
% change this info string if making any custom modification
\ProvidesFile{sphinxlatexgraphics.sty}[2021/01/27 graphics]
% Provides support for this output mark-up from Sphinx latex writer:
%
% - macros:
%
% - \sphinxfigcaption
% - \sphinxincludegraphics
%
% - environments:
%
% - sphinxfigure-in-table
%
% May change:
%
% - \sphinxcaption (at begin document)
%
% Also provides:
%
% - \sphinxsafeincludegraphics (default of \sphinxincludegraphics since 2.0)
% - \spx@image@maxheight dimension (used by sphinxlatexadmonitions.sty)
% - \spx@image@box scratch box register (also used by sphinxlatexliterals.sty)
%
% Requires:
% \RequirePackage{graphicx}% done in sphinx.sty
\RequirePackage{amstext}% needed for \firstchoice@true(false)
% \sphinxincludegraphics resizes images larger than the TeX \linewidth (which
% is adjusted in indented environments), or taller than a certain maximal
% height (usually \textheight and this is reduced in the environments which use
% framed.sty to avoid infinite loop if image too tall).
%
% In case height or width options are present the rescaling is done
% (since 2.0), in a way keeping the width:height ratio either native from
% image or from the width and height options if both were present.
%
\newdimen\spx@image@maxheight
\AtBeginDocument{\spx@image@maxheight\textheight}
% box scratch register
\newbox\spx@image@box
\newcommand*{\sphinxsafeincludegraphics}[2][]{%
% #1 contains possibly width=, height=, but no scale= since 1.8.4
\setbox\spx@image@box\hbox{\includegraphics[#1,draft]{#2}}%
\in@false % use some handy boolean flag
\ifdim \wd\spx@image@box>\linewidth
\in@true % flag to remember to adjust options and set box dimensions
% compute height which results from rescaling width to \linewidth
% and keep current aspect ratio. multiply-divide in \numexpr uses
% temporarily doubled precision, hence no overflow. (of course we
% assume \ht is not a few sp's below \maxdimen...(about 16384pt).
\edef\spx@image@rescaledheight % with sp units
{\the\numexpr\ht\spx@image@box
*\linewidth/\wd\spx@image@box sp}%
\ifdim\spx@image@rescaledheight>\spx@image@maxheight
% the rescaled height will be too big, so it is height which decides
% the rescaling factor
\def\spx@image@requiredheight{\spx@image@maxheight}% dimen register
\edef\spx@image@requiredwidth % with sp units
{\the\numexpr\wd\spx@image@box
*\spx@image@maxheight/\ht\spx@image@box sp}%
% TODO: decide if this commented-out block could be needed due to
% rounding in numexpr operations going up
% \ifdim\spx@image@requiredwidth>\linewidth
% \def\spx@image@requiredwidth{\linewidth}% dimen register
% \fi
\else
\def\spx@image@requiredwidth{\linewidth}% dimen register
\let\spx@image@requiredheight\spx@image@rescaledheight% sp units
\fi
\else
% width is ok, let's check height
\ifdim\ht\spx@image@box>\spx@image@maxheight
\in@true
\edef\spx@image@requiredwidth % with sp units
{\the\numexpr\wd\spx@image@box
*\spx@image@maxheight/\ht\spx@image@box sp}%
\def\spx@image@requiredheight{\spx@image@maxheight}% dimen register
\fi
\fi % end of check of width and height
\ifin@
\setbox\spx@image@box
\hbox{\includegraphics
[%#1,% contained only width and/or height and overruled anyhow
width=\spx@image@requiredwidth,height=\spx@image@requiredheight]%
{#2}}%
% \includegraphics does not set box dimensions to the exactly
% requested ones, see https://github.com/latex3/latex2e/issues/112
\wd\spx@image@box\spx@image@requiredwidth
\ht\spx@image@box\spx@image@requiredheight
\leavevmode\box\spx@image@box
\else
% here we do not modify the options, no need to adjust width and height
% on output, they will be computed exactly as with "draft" option
\setbox\spx@image@box\box\voidb@x % clear memory
\includegraphics[#1]{#2}%
\fi
}%
% Use the "safe" one by default (2.0)
\def\sphinxincludegraphics{\sphinxsafeincludegraphics}
%% FIGURE IN TABLE
%
\newenvironment{sphinxfigure-in-table}[1][\linewidth]{%
\def\@captype{figure}%
\sphinxsetvskipsforfigintablecaption
\begin{minipage}{#1}%
}{\end{minipage}}
% tabulary expands twice contents, we need to prevent double counter stepping
\newcommand*\sphinxfigcaption
{\ifx\equation$%$% this is trick to identify tabulary first pass
\firstchoice@false\else\firstchoice@true\fi
\spx@originalcaption }
\newcommand*\sphinxsetvskipsforfigintablecaption
{\abovecaptionskip\smallskipamount
\belowcaptionskip\smallskipamount}
\endinput
|
