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+\ProvidesPackage{stackengine}
+[2013/06/12 v1.0
+ Stacking text and objects in convenient ways]
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+% http://www.latex-project.org/lppl.txt
+% and version 1.3c or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+%
+% This work has the LPPL maintenance status `maintained'.
+%
+% The Current Maintainer of this work is Steven B. Segletes.
+%
+% V1.0 Initial release.
+
+\usepackage{calc}
+\usepackage{readarray}
+
+\newcounter{stackindex}
+\newlength\Sstackgap
+\newlength\Lstackgap
+\newlength\boxshift
+\newlength\stack@tmplength
+\global\newlength\stackedboxwidth
+\newsavebox\addedbox
+\newsavebox\anchorbox
+\newsavebox\stackedbox
+
+\newcommand\stackgap{\if S\stacktype\the\Sstackgap\else\the\Lstackgap\fi}
+
+\global\Sstackgap=3pt % SHORTSTACKING GAP BETWEEN ITEMS (SAME AS \shortstack)
+\global\Lstackgap=\baselineskip % LONGSTACKING GAP BETWEEN ITEMS (def. \baselineskip)
+\def\useanchorwidth{F}% T= FORCE BOX WIDTH TO ANCHOR-WIDTH
+\def\quietstack{F}% T = SUPPRESS OUTPUT OF ALL COMMANDS
+% (USE \usebox{\stackedbox} TO RETRIEVE)
+\def\stackalignment{c}% l, c, or r for left, center or right alignment
+\def\stacktype{S}% S for constant gap shortstack;
+ % L for constant baselineskip longstack
+\def\usestackstrut{T}%
+
+%\stackengine{\Sstackgap or \Lstackgap or \stackgap or stacklength}
+% {anchor}
+% {item}
+% {O or U}
+% {\stackalignment or l or c or r}
+% {\quietstack or T or F}
+% {\useanchorwidth or T or F}
+% {\stacktype or S or L}
+\newcommand*\stackengine[8]{%
+ \sbox{\stackedbox}{%
+ \sbox{\anchorbox}{#2}%
+ \sbox{\addedbox}{#3}%
+ \settowidth{\stackedboxwidth}{#2}%
+ \if F#7%
+ \ifdim\wd\addedbox>\stackedboxwidth%
+ \settowidth{\stackedboxwidth}{#3}%
+ \fi%
+ \fi%
+ \setlength{\boxshift}{#1}%
+ \if L#8%
+ \if U#4%
+ \setlength{\boxshift}{-\boxshift}%
+ \fi%
+ \else%
+ \if U#4%
+ \setlength{\boxshift}{-\dp\anchorbox -\ht\addedbox -\boxshift}%
+ \else%
+ \setlength{\boxshift}{\ht\anchorbox +\dp\addedbox +\boxshift}%
+ \fi%
+ \fi%
+ \if c#5%
+ \hspace{.5\stackedboxwidth}%
+ \hspace{-.5\wd\anchorbox}%
+ \usebox{\anchorbox}%
+ \hspace{-.5\wd\anchorbox}%
+ \hspace{-.5\wd\addedbox}%
+ \raisebox{\boxshift}{#3}%
+ \hspace{-.5\wd\addedbox}%
+ \hspace{.5\stackedboxwidth}%
+ \else%
+ \if l#5%
+ \usebox{\anchorbox}%
+ \hspace{-\wd\anchorbox}%
+ \raisebox{\boxshift}{#3}%
+ \hspace{-\wd\addedbox}%
+ \hspace{\stackedboxwidth}%
+ \else%
+ \if r#5%
+ \hspace{\stackedboxwidth}%
+ \hspace{-\wd\anchorbox}%
+ \usebox{\anchorbox}%
+ \hspace{-\wd\addedbox}%
+ \raisebox{\boxshift}{#3}%
+ \fi%
+ \fi%
+ \fi%
+ }%
+ \if F#6\usebox{\stackedbox}\fi%
+}
+
+\newcommand*\stackunder[3][\stackgap]{%
+ \stackengine{#1}{#2}{#3}{U}{\stackalignment}{\quietstack}{\useanchorwidth}%
+ {\stacktype}}
+
+\newcommand*\stackon[3][\stackgap]{%
+ \stackengine{#1}{#2}{#3}{O}{\stackalignment}{\quietstack}{\useanchorwidth}%
+ {\stacktype}}
+
+\newcommand*\Shortstack[2][\stackalignment]{%
+ \getargsC{#2}%
+ \setcounter{stackindex}{1}%
+ \sbox{\stackedbox}{\argi}%
+ \whiledo{\thestackindex < \narg}{%
+ \stepcounter{stackindex}%
+ \stackengine{\Sstackgap}{\csname arg\roman{stackindex}\endcsname}%
+ {\usebox{\stackedbox}}{O}{#1}{T}{\useanchorwidth}{S}%
+ }%
+ \if F\quietstack\usebox{\stackedbox}\fi%
+}
+
+\newcommand*\Shortunderstack[2][\stackalignment]{%
+ \getargsC{#2}%
+ \setcounter{stackindex}{\narg}%
+ \sbox{\stackedbox}{\csname arg\roman{stackindex}\endcsname}%
+ \whiledo{\thestackindex > 1}{%
+ \addtocounter{stackindex}{-1}%
+ \stackengine{\Sstackgap}{\csname arg\roman{stackindex}\endcsname}%
+ {\usebox{\stackedbox}}{U}{#1}{T}{\useanchorwidth}{S}%
+ }%
+ \if F\quietstack\usebox{\stackedbox}\fi%
+}
+
+\newcommand*\Longstack[2][\stackalignment]{%
+ \getargsC{#2}%
+ \setcounter{stackindex}{1}%
+ \sbox{\stackedbox}{\argi}%
+ \whiledo{\thestackindex < \narg}{%
+ \stepcounter{stackindex}%
+ \stackengine{\Lstackgap}{\csname arg\roman{stackindex}\endcsname}%
+ {\usebox{\stackedbox}}{O}{#1}{T}{\useanchorwidth}{L}%
+ }%
+ \if F\quietstack\usebox{\stackedbox}\fi%
+}
+
+\newcommand*\Longunderstack[2][\stackalignment]{%
+ \getargsC{#2}%
+ \setcounter{stackindex}{\narg}%
+ \sbox{\stackedbox}{\csname arg\roman{stackindex}\endcsname}%
+ \whiledo{\thestackindex > 1}{%
+ \addtocounter{stackindex}{-1}%
+ \stackengine{\Lstackgap}{\csname arg\roman{stackindex}\endcsname}%
+ {\usebox{\stackedbox}}{U}{#1}{T}{\useanchorwidth}{L}%
+ }%
+ \if F\quietstack\usebox{\stackedbox}\fi%
+}
+
+\newcommand*\tllap[2][\Lstackgap]{%
+ \stackengine{#1}{}{#2}{O}{r}{\quietstack}{T}{L}%
+}
+
+\newcommand*\tclap[2][\Lstackgap]{%
+ \stackengine{#1}{}{#2}{O}{c}{\quietstack}{T}{L}%
+}
+
+\newcommand*\trlap[2][\Lstackgap]{%
+ \stackengine{#1}{}{#2}{O}{l}{\quietstack}{T}{L}%
+}
+
+\newcommand*\bllap[2][\Lstackgap]{%
+ \stackengine{#1}{}{#2}{U}{r}{\quietstack}{T}{L}%
+}
+
+\newcommand*\bclap[2][\Lstackgap]{%
+ \stackengine{#1}{}{#2}{U}{c}{\quietstack}{T}{L}%
+}
+
+\newcommand*\brlap[2][\Lstackgap]{%
+ \stackengine{#1}{}{#2}{U}{l}{\quietstack}{T}{L}%
+}
+
+\newcommand*\stackanchor[3][\stackgap]{%
+ \setlength{\stack@tmplength}{#1}%
+ \setlength{\stack@tmplength}{.5\stack@tmplength}%
+ \if T\usestackstrut%
+ \if S\stacktype\addtolength{\stack@tmplength}%
+ {.5\ht\strutbox-.5\dp\strutbox}\fi%
+ \fi%
+ \stackengine{\stack@tmplength}{}{#2}{O}{\stackalignment}{T}{F}{\stacktype}%
+ \if T\usestackstrut%
+ \if S\stacktype\addtolength{\stack@tmplength}%
+ {-\ht\strutbox+\dp\strutbox}\fi%
+ \fi%
+ \stackengine{\stack@tmplength}{\usebox{\stackedbox}}{#3}{U}%
+ {\stackalignment}{\quietstack}{F}{\stacktype}%
+}
+
+\newcommand*\belowbaseline[2][\stackgap]{%
+ \stackengine{#1}{}{#2}{U}{\stackalignment}{\quietstack}{F}%
+ {\stacktype}}
+
+\newcommand*\topinset[4]{\stack@inset{#1}{#2}{#3}{#4}{O}}
+
+\newcommand*\bottominset[4]{\stack@inset{#1}{#2}{#3}{#4}{U}}
+
+\newcommand*\stack@inset[5]{%
+ \ifthenelse{\equal{#3}{}}
+ {\setlength{\stack@tmplength}{0pt}}%
+ {\setlength{\stack@tmplength}{#3}}%
+ \ifthenelse{\equal{#4}{}}{\def\stack@tmp{0pt}}{\def\stack@tmp{#4}}%
+ \def\stack@lroffset{\rule{\stack@tmp}{0pt}}%
+ \addtolength{\stack@tmplength}{\heightof{#1}}%
+ \stackengine{-\stack@tmplength}{#2}{\stack@lroffset#1\stack@lroffset}%
+ {#5}{\stackalignment}{\quietstack}{\useanchorwidth}{S}%
+}
+
+\newcommand*\savestack[2]{%
+ \global\edef\sv@name{\stack@macro@name{#1}}%
+ \@ifundefined{\sv@name content}{%
+ \expandafter\newsavebox\expandafter{\csname\sv@name content\endcsname}%
+ }{}%
+ \expandafter\sbox\csname\sv@name content\endcsname{#2}%
+ \protected@edef#1{\usebox{\csname\sv@name content\endcsname}}%
+}
+
+% Following 3 lines thanks to Prof. Enrico Gregorio, from:
+% http://tex.stackexchange.com/questions/42318/
+% removing-a-backslash-from-a-character-sequence
+\begingroup\lccode`\|=`\\
+\lowercase{\endgroup\def\removebs#1{\if#1|\else#1\fi}}
+\newcommand{\stack@macro@name}[1]{\expandafter\removebs\string#1}
+%
+
+\endinput
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-13 03:13:18 +0000