mirror of
https://github.com/pds-nest/nest.git
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317 lines
14 KiB
TeX
317 lines
14 KiB
TeX
\NeedsTeXFormat{LaTeX2e}
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\ProvidesPackage{sphinxmulticell}%
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[2017/02/23 v1.6 better span rows and columns of a table (Sphinx team)]%
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\DeclareOption*{\PackageWarning{sphinxmulticell}{Option `\CurrentOption' is unknown}}%
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\ProcessOptions\relax
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%
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% --- MULTICOLUMN ---
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% standard LaTeX's \multicolumn
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% 1. does not allow verbatim contents,
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% 2. interacts very poorly with tabulary.
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%
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% It is needed to write own macros for Sphinx: to allow code-blocks in merged
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% cells rendered by tabular/longtable, and to allow multi-column cells with
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% paragraphs to be taken into account sanely by tabulary algorithm for column
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% widths.
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%
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% This requires quite a bit of hacking. First, in Sphinx, the multi-column
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% contents will *always* be wrapped in a varwidth environment. The issue
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% becomes to pass it the correct target width. We must trick tabulary into
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% believing the multicolumn is simply separate columns, else tabulary does not
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% incorporate the contents in its algorithm. But then we must clear the
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% vertical rules...
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%
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% configuration of tabulary
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\setlength{\tymin}{3\fontcharwd\font`0 }% minimal width of "squeezed" columns
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\setlength{\tymax}{10000pt}% allow enough room for paragraphs to "compete"
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% we need access to tabulary's final computed width. \@tempdima is too volatile
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% to hope it has kept tabulary's value when \sphinxcolwidth needs it.
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\newdimen\sphinx@TY@tablewidth
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\def\tabulary{%
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\def\TY@final{\sphinx@TY@tablewidth\@tempdima\tabular}%
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\let\endTY@final\endtabular
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\TY@tabular}%
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% next hack is needed only if user has set latex_use_latex_multicolumn to True:
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% it fixes tabulary's bug with \multicolumn defined "short" in first pass. (if
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% upstream tabulary adds a \long, our extra one causes no harm)
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\def\sphinx@tempa #1\def\multicolumn#2#3#4#5#6#7#8#9\sphinx@tempa
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{\def\TY@tab{#1\long\def\multicolumn####1####2####3{\multispan####1\relax}#9}}%
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\expandafter\sphinx@tempa\TY@tab\sphinx@tempa
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%
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% TN. 1: as \omit is never executed, Sphinx multicolumn does not need to worry
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% like standard multicolumn about |l| vs l|. On the other hand it assumes
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% columns are separated by a | ... (if not it will add extraneous
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% \arrayrulewidth space for each column separation in its estimate of available
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% width).
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%
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% TN. 1b: as Sphinx multicolumn uses neither \omit nor \span, it can not
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% (easily) get rid of extra macros from >{...} or <{...} between columns. At
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% least, it has been made compatible with colortbl's \columncolor.
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%
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% TN. 2: tabulary's second pass is handled like tabular/longtable's single
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% pass, with the difference that we hacked \TY@final to set in
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% \sphinx@TY@tablewidth the final target width as computed by tabulary. This is
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% needed only to handle columns with a "horizontal" specifier: "p" type columns
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% (inclusive of tabulary's LJRC) holds the target column width in the
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% \linewidth dimension.
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%
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% TN. 3: use of \begin{sphinxmulticolumn}...\end{sphinxmulticolumn} mark-up
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% would need some hacking around the fact that groups can not span across table
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% cells (the code does inserts & tokens, see TN1b). It was decided to keep it
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% simple with \sphinxstartmulticolumn...\sphinxstopmulticolumn.
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%
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% MEMO about nesting: if sphinxmulticolumn is encountered in a nested tabular
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% inside a tabulary it will think to be at top level in the tabulary. But
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% Sphinx generates no nested tables, and if some LaTeX macro uses internally a
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% tabular this will not have a \sphinxstartmulticolumn within it!
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%
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\def\sphinxstartmulticolumn{%
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\ifx\equation$% $ tabulary's first pass
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\expandafter\sphinx@TYI@start@multicolumn
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\else % either not tabulary or tabulary's second pass
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\expandafter\sphinx@start@multicolumn
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\fi
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}%
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\def\sphinxstopmulticolumn{%
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\ifx\equation$% $ tabulary's first pass
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\expandafter\sphinx@TYI@stop@multicolumn
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\else % either not tabulary or tabulary's second pass
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\ignorespaces
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\fi
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}%
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\def\sphinx@TYI@start@multicolumn#1{%
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% use \gdef always to avoid stack space build up
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\gdef\sphinx@tempa{#1}\begingroup\setbox\z@\hbox\bgroup
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}%
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\def\sphinx@TYI@stop@multicolumn{\egroup % varwidth was used with \tymax
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\xdef\sphinx@tempb{\the\dimexpr\wd\z@/\sphinx@tempa}% per column width
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\endgroup
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\expandafter\sphinx@TYI@multispan\expandafter{\sphinx@tempa}%
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}%
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\def\sphinx@TYI@multispan #1{%
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\kern\sphinx@tempb\ignorespaces % the per column occupied width
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\ifnum#1>\@ne % repeat, taking into account subtleties of TeX's & ...
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\expandafter\sphinx@TYI@multispan@next\expandafter{\the\numexpr#1-\@ne\expandafter}%
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\fi
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}%
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\def\sphinx@TYI@multispan@next{&\relax\sphinx@TYI@multispan}%
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%
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% Now the branch handling either the second pass of tabulary or the single pass
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% of tabular/longtable. This is the delicate part where we gather the
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% dimensions from the p columns either set-up by tabulary or by user p column
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% or Sphinx \X, \Y columns. The difficulty is that to get the said width, the
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% template must be inserted (other hacks would be horribly complicated except
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% if we rewrote crucial parts of LaTeX's \@array !) and we can not do
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% \omit\span like standard \multicolumn's easy approach. Thus we must cancel
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% the \vrule separators. Also, perhaps the column specifier is of the l, c, r
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% type, then we attempt an ad hoc rescue to give varwidth a reasonable target
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% width.
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\def\sphinx@start@multicolumn#1{%
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\gdef\sphinx@multiwidth{0pt}\gdef\sphinx@tempa{#1}\sphinx@multispan{#1}%
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}%
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\def\sphinx@multispan #1{%
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\ifnum#1=\@ne\expandafter\sphinx@multispan@end
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\else\expandafter\sphinx@multispan@next
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\fi {#1}%
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}%
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\def\sphinx@multispan@next #1{%
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% trick to recognize L, C, R, J or p, m, b type columns
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\ifdim\baselineskip>\z@
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\gdef\sphinx@tempb{\linewidth}%
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\else
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% if in an l, r, c type column, try and hope for the best
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\xdef\sphinx@tempb{\the\dimexpr(\ifx\TY@final\@undefined\linewidth\else
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\sphinx@TY@tablewidth\fi-\arrayrulewidth)/\sphinx@tempa
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-\tw@\tabcolsep-\arrayrulewidth\relax}%
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\fi
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\noindent\kern\sphinx@tempb\relax
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\xdef\sphinx@multiwidth
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{\the\dimexpr\sphinx@multiwidth+\sphinx@tempb+\tw@\tabcolsep+\arrayrulewidth}%
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% hack the \vline and the colortbl macros
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\sphinx@hack@vline\sphinx@hack@CT&\relax
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% repeat
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\expandafter\sphinx@multispan\expandafter{\the\numexpr#1-\@ne}%
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}%
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% packages like colortbl add group levels, we need to "climb back up" to be
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% able to hack the \vline and also the colortbl inserted tokens. This creates
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% empty space whether or not the columns were | separated:
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\def\sphinx@hack@vline{\ifnum\currentgrouptype=6\relax
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\kern\arrayrulewidth\arrayrulewidth\z@\else\aftergroup\sphinx@hack@vline\fi}%
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\def\sphinx@hack@CT{\ifnum\currentgrouptype=6\relax
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\let\CT@setup\sphinx@CT@setup\else\aftergroup\sphinx@hack@CT\fi}%
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% It turns out \CT@row@color is not expanded contrarily to \CT@column@color
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% during LaTeX+colortbl preamble preparation, hence it would be possible for
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% \sphinx@CT@setup to discard only the column color and choose to obey or not
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% row color and cell color. It would even be possible to propagate cell color
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% to row color for the duration of the Sphinx multicolumn... the (provisional?)
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% choice has been made to cancel the colortbl colours for the multicolumn
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% duration.
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\def\sphinx@CT@setup #1\endgroup{\endgroup}% hack to remove colour commands
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\def\sphinx@multispan@end#1{%
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% first, trace back our steps horizontally
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\noindent\kern-\dimexpr\sphinx@multiwidth\relax
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% and now we set the final computed width for the varwidth environment
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\ifdim\baselineskip>\z@
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\xdef\sphinx@multiwidth{\the\dimexpr\sphinx@multiwidth+\linewidth}%
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\else
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\xdef\sphinx@multiwidth{\the\dimexpr\sphinx@multiwidth+
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(\ifx\TY@final\@undefined\linewidth\else
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\sphinx@TY@tablewidth\fi-\arrayrulewidth)/\sphinx@tempa
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-\tw@\tabcolsep-\arrayrulewidth\relax}%
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\fi
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% we need to remove colour set-up also for last cell of the multi-column
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\aftergroup\sphinx@hack@CT
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}%
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\newcommand*\sphinxcolwidth[2]{%
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% this dimension will always be used for varwidth, and serves as maximum
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% width when cells are merged either via multirow or multicolumn or both,
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% as always their contents is wrapped in varwidth environment.
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\ifnum#1>\@ne % multi-column (and possibly also multi-row)
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% we wrote our own multicolumn code especially to handle that (and allow
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% verbatim contents)
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\ifx\equation$%$
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\tymax % first pass of tabulary (cf MEMO above regarding nesting)
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\else % the \@gobble thing is for compatibility with standard \multicolumn
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\sphinx@multiwidth\@gobble{#1/#2}%
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\fi
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\else % single column multirow
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\ifx\TY@final\@undefined % not a tabulary.
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\ifdim\baselineskip>\z@
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% in a p{..} type column, \linewidth is the target box width
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\linewidth
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\else
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% l, c, r columns. Do our best.
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\dimexpr(\linewidth-\arrayrulewidth)/#2-
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\tw@\tabcolsep-\arrayrulewidth\relax
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\fi
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\else % in tabulary
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\ifx\equation$%$% first pass
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\tymax % it is set to a big value so that paragraphs can express themselves
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\else
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% second pass.
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\ifdim\baselineskip>\z@
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\linewidth % in a L, R, C, J column or a p, \X, \Y ...
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\else
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% we have hacked \TY@final to put in \sphinx@TY@tablewidth the table width
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\dimexpr(\sphinx@TY@tablewidth-\arrayrulewidth)/#2-
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\tw@\tabcolsep-\arrayrulewidth\relax
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\fi
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\fi
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\fi
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\fi
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}%
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% fallback default in case user has set latex_use_latex_multicolumn to True:
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% \sphinxcolwidth will use this only inside LaTeX's standard \multicolumn
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\def\sphinx@multiwidth #1#2{\dimexpr % #1 to gobble the \@gobble (!)
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(\ifx\TY@final\@undefined\linewidth\else\sphinx@TY@tablewidth\fi
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-\arrayrulewidth)*#2-\tw@\tabcolsep-\arrayrulewidth\relax}%
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%
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% --- MULTIROW ---
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% standard \multirow
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% 1. does not allow verbatim contents,
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% 2. does not allow blank lines in its argument,
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% 3. its * specifier means to typeset "horizontally" which is very
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% bad for paragraph content. 2016 version has = specifier but it
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% must be used with p type columns only, else results are bad,
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% 4. it requires manual intervention if the contents is too long to fit
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% in the asked-for number of rows.
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% 5. colour panels (either from \rowcolor or \columncolor) will hide
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% the bottom part of multirow text, hence manual tuning is needed
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% to put the multirow insertion at the _bottom_.
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%
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% The Sphinx solution consists in always having contents wrapped
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% in a varwidth environment so that it makes sense to estimate how many
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% lines it will occupy, and then ensure by insertion of suitable struts
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% that the table rows have the needed height. The needed mark-up is done
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% by LaTeX writer, which has its own id for the merged cells.
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%
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% The colour issue is solved by clearing colour panels in all cells,
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% whether or not the multirow is single-column or multi-column.
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%
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% In passing we obtain baseline alignements across rows (only if
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% \arraystretch is 1, as LaTeX's does not obey \arraystretch in "p"
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% multi-line contents, only first and last line...)
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%
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% TODO: examine the situation with \arraystretch > 1. The \extrarowheight
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% is hopeless for multirow anyhow, it makes baseline alignment strictly
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% impossible.
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\newcommand\sphinxmultirow[2]{\begingroup
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% #1 = nb of spanned rows, #2 = Sphinx id of "cell", #3 = contents
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% but let's fetch #3 in a way allowing verbatim contents !
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\def\sphinx@nbofrows{#1}\def\sphinx@cellid{#2}%
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\afterassignment\sphinx@multirow\let\next=
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}%
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\def\sphinx@multirow {%
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\setbox\z@\hbox\bgroup\aftergroup\sphinx@@multirow\strut
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}%
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\def\sphinx@@multirow {%
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% The contents, which is a varwidth environment, has been captured in
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% \box0 (a \hbox).
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% We have with \sphinx@cellid an assigned unique id. The goal is to give
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% about the same height to all the involved rows.
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% For this Sphinx will insert a \sphinxtablestrut{cell_id} mark-up
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% in LaTeX file and the expansion of the latter will do the suitable thing.
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\dimen@\dp\z@
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\dimen\tw@\ht\@arstrutbox
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\advance\dimen@\dimen\tw@
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\advance\dimen\tw@\dp\@arstrutbox
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\count@=\dimen@ % type conversion dim -> int
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\count\tw@=\dimen\tw@
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\divide\count@\count\tw@ % TeX division truncates
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\advance\dimen@-\count@\dimen\tw@
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% 1300sp is about 0.02pt. For comparison a rule default width is 0.4pt.
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% (note that if \count@ holds 0, surely \dimen@>1300sp)
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\ifdim\dimen@>1300sp \advance\count@\@ne \fi
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% now \count@ holds the count L of needed "lines"
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% and \sphinx@nbofrows holds the number N of rows
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% we have L >= 1 and N >= 1
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% if L is a multiple of N, ... clear what to do !
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% else write L = qN + r, 1 <= r < N and we will
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% arrange for each row to have enough space for:
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% q+1 "lines" in each of the first r rows
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% q "lines" in each of the (N-r) bottom rows
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% for a total of (q+1) * r + q * (N-r) = q * N + r = L
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% It is possible that q == 0.
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\count\tw@\count@
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% the TeX division truncates
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\divide\count\tw@\sphinx@nbofrows\relax
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\count4\count\tw@ % q
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\multiply\count\tw@\sphinx@nbofrows\relax
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\advance\count@-\count\tw@ % r
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\expandafter\xdef\csname sphinx@tablestrut_\sphinx@cellid\endcsname
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{\noexpand\sphinx@tablestrut{\the\count4}{\the\count@}{\sphinx@cellid}}%
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\dp\z@\z@
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% this will use the real height if it is >\ht\@arstrutbox
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\sphinxtablestrut{\sphinx@cellid}\box\z@
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\endgroup % group was opened in \sphinxmultirow
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}%
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\newcommand*\sphinxtablestrut[1]{%
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% #1 is a "cell_id", i.e. the id of a merged group of table cells
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\csname sphinx@tablestrut_#1\endcsname
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}%
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% LaTeX typesets the table row by row, hence each execution can do
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% an update for the next row.
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\newcommand*\sphinx@tablestrut[3]{\begingroup
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% #1 = q, #2 = (initially) r, #3 = cell_id, q+1 lines in first r rows
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% if #2 = 0, create space for max(q,1) table lines
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% if #2 > 0, create space for q+1 lines and decrement #2
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\leavevmode
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\count@#1\relax
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\ifnum#2=\z@
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\ifnum\count@=\z@\count@\@ne\fi
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\else
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% next row will be with a #2 decremented by one
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\expandafter\xdef\csname sphinx@tablestrut_#3\endcsname
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{\noexpand\sphinx@tablestrut{#1}{\the\numexpr#2-\@ne}{#3}}%
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\advance\count@\@ne
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\fi
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\vrule\@height\ht\@arstrutbox
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\@depth\dimexpr\count@\ht\@arstrutbox+\count@\dp\@arstrutbox-\ht\@arstrutbox\relax
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\@width\z@
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\endgroup
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% we need this to avoid colour panels hiding bottom parts of multirow text
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\sphinx@hack@CT
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}%
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\endinput
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%%
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%% End of file `sphinxmulticell.sty'.
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