/
tcbbreakable.code.tex
1075 lines (995 loc) · 33.9 KB
/
tcbbreakable.code.tex
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%% The LaTeX package tcolorbox - version 6.3.0pre2 (2024/05/15)
%% tcbbreakable.code.tex: Code for breakable colorboxes
%%
%% -------------------------------------------------------------------------------------------
%% Copyright (c) 2006-2024 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
%% -------------------------------------------------------------------------------------------
%%
%% 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 1.3 or later is part of all distributions of LaTeX
%% version 2005/12/01 or later.
%%
%% This work has the LPPL maintenance status `author-maintained'.
%%
%% This work consists of all files listed in README
%%
\tcb@set@library@version{6.3.0pre2}
\RequirePackage{pdfcol}
\pdfcolInitStack{tcb@breakable}
\newif\iftcb@usecolorstack
\let\tcb@parboxrestore@true=\tcb@parboxrestore
\let\tcb@parboxrestore@false\tcb@parbox@false@settings
% total height for boxes smaller than 0.4375\maxdimen and 0.4375\maxdimen else (ca 2.5m)
\def\tcb@defToTotalHeightBreakable#1#2{%
\ifnum\ht#2<0\relax%
\edef#1{7168pt}%
\else\ifnum\ht#2<469762048\relax%
\tcbdimto#1{\ht#2+\dp#2}%
\else%
\edef#1{7168pt}%
\fi\fi%
}
\newbox\tcb@testbox
% for oversized boxes height is detected as \textheight or larger
\def\tcb@defToTotalHeightUnlimited#1#2{%
\tcb@defToTotalHeightBreakable#1#2%
\ifdim\dimexpr#1<\textheight\relax%
\edef\tcb@thevfuzz{\the\vfuzz}%
\edef\tcb@thevbadness{\the\vbadness}%
\vfuzz=\maxdimen\vbadness=10000%
\splittopskip=0pt%
\splitmaxdepth=0pt%
\savingvdiscards=1%
\setbox\tcb@testbox=\vsplit#2 to \textheight%
\vbadness=\tcb@thevbadness\vfuzz=\tcb@thevfuzz%
\ifdim\wd#2=0pt\relax%
\tcb@swap{#2}{\tcb@testbox}%
\tcbdimto#1{\ht#2+\dp#2}%
\else%
\setbox#2=\vbox{%
\unvbox\tcb@testbox%
\splitdiscards%
\unvbox#2}%
\edef#1{7168pt}%
\fi%
\savingvdiscards=0%
\fi%
}
\def\tcb@@break{\par\xleaders\vbox{\rule{0pt}{2\textheight}}\vskip 2\textheight\par}
% #1 box
% #2 width
% #3 color (for color stack)
\def\tcb@vbox#1#2#3{%
\edef\reserved@a{%
\endgroup%
\setbox#1\vbox{\hsize=#2%
\begingroup\aftergroup}%
\def\noexpand\@currenvir{\@currenvir}%
\def\noexpand\@currenvline{\on@line}}%
\reserved@a%
\@endpefalse%
\global\@newlistfalse%
\tcb@set@savebox@construction@true%
\let\tcbbreak\tcb@@break%
\iftcb@usecolorstack%
\pdfcolSwitchStack{tcb@breakable}%
\fi%
\color@begingroup%
\textwidth\hsize%
\columnwidth\hsize%
\csname tcb@parboxrestore@\kvtcb@parbox\endcsname%
\def\@mpfn{mpfootnote}%
\def\thempfn{\thempfootnote}%
\c@mpfootnote\z@%
\let\@footnotetext\@mpfootnotetext%
\let\@listdepth\@mplistdepth \@mplistdepth\z@%
\@setminipage%
\color{#3}%
\tcb@hyph@fix%
\let\tcb@drawcolorbox\tcb@drawcolorbox@standalone%
\let\FN@pp@footnote\@empty% disable perpage mode of 'footmisc' package
}
\def\endtcb@vbox{%
\par%
\unskip%
\ifvoid\@mpfootins\else%
\vskip\skip\@mpfootins%
\normalcolor%
\footnoterule%
\unvbox\@mpfootins%
\fi%
\@minipagefalse%
\color@endgroup}
% remaining height
\def\tcb@comp@h@page{%
\tcb@breakat@next%
\ifdim\tcb@breakat@dim>0pt\relax%
\tcbdimto\tcb@h@page{\tcb@breakat@dim-\kvtcb@shrinkbreakgoal}%
\else%
\ifx\kvtcb@float\@empty\relax%
\iftcb@multicol%
\ifnum\c@tcbbreakpart>1\relax%
\tcbdimto\tcb@h@page{\@colroom}%
\else%
\ifdim\pagegoal=16383.99998pt\relax%
\tcbdimto\tcb@h@page{\@colroom}%
\else%
\@tempdima\pagetotal%
\@whiledim \@tempdima>\@colroom \do{\advance\@tempdima-\@colroom}%
\tcbdimto\tcb@h@page{\@colroom-\@tempdima}%
\fi%
\fi%
\else%
\ifdim\pagegoal=16383.99998pt\relax%
\tcbdimto\tcb@h@page{\vsize}% detects floating objects
\else%
\tcb@comp@compress%
\tcbdimto\tcb@h@page{\pagegoal-\pagetotal+\tcb@compress@height}%
\fi%
\fi%
\else%
\tcbdimto\tcb@h@page{\textheight}%
\fi%
\tcbdimto\tcb@h@page{\tcb@h@page+\tcb@breakat@dim-\kvtcb@shrinkbreakgoal}%
\fi%
}
\def\tcb@comp@h@total@standalone{%
\tcbdimto\tcb@h@padding{\kvtcb@bbtop@stand+\kvtcb@bbbottom@stand+\kvtcb@top@rule@stand+\kvtcb@bottom@rule@stand+\kvtcb@boxsep*2+\kvtcb@top+\kvtcb@bottom}%
\tcbdimto\tcb@h@total{\tcb@h@padding+\tcb@h@padtitle+\tcb@h@upper+\tcb@h@segment+\tcb@h@lower}%
}
\newif\iftcb@final@box
\def\tcb@check@for@final@box{%
\ifdim\tcb@h@total>\tcb@h@page\relax%
\iftcb@multicol%
\tcb@final@boxfalse%
\else%
\ifdim\tcb@h@total>\dimexpr\tcb@h@page+\kvtcb@enlargepage@flex\relax%
\tcb@final@boxfalse%
\else%
\tcbdimto\tcb@temp{\tcb@h@total-\tcb@h@page}%
\enlargethispage*{\tcb@temp}%
\tcbdimto\tcb@h@page{\tcb@h@page+\tcb@temp}%
\tcb@final@boxtrue%
\fi%
\fi%
\else%
\tcb@final@boxtrue%
\fi%
}
\def\tcb@following@title{%
\ifx\kvtcb@followingtitle\@empty\relax%
\tcb@hasTitlefalse%
\let\tcb@h@title=\tcb@zpt%
\let\tcb@h@padtitle=\tcb@zpt%
\else%
\tcb@hasTitletrue%
\tcbdimto\tcb@w@title{\tcb@innerwidth-\kvtcb@boxsep*2-\kvtcb@lefttitle-\kvtcb@righttitle}%
\begin{tcb@savebox}{\tcb@titlebox}{\tcb@w@title}{tcbcoltitle}\tcb@extras@followingtitle\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@followingtitle\end{tcb@savebox}%
\tcbdimto\tcb@h@title{\ht\tcb@titlebox+\dp\tcb@titlebox}%
\tcbdimto\tcb@h@padtitle{\kvtcb@title@rule+\kvtcb@boxsep*2+\kvtcb@toptitle+\kvtcb@bottomtitle+\tcb@h@title}%
\fi%
}
\newbox\tcb@totalupperbox
\newbox\tcb@totallowerbox
\newif\iftcb@break@allowed
\def\tcb@enlbreak@next@final{%
\ifdim\dimexpr\tcb@enlbreak@dim=0pt\relax
\else%
\iftcb@multicol\else\enlargethispage{\tcb@enlbreak@dim}\fi%
\fi%
}
\def\tcb@enlbreak@next@scan#1/#2@{%
\def\temp@a{#2}%
\tcbdimto\tcb@enlbreak@dim{#1}%
\ifx\temp@a\@empty\relax%
\let\tcb@enlbreak@next=\tcb@enlbreak@next@final%
\else%
\edef\tcb@enlbreak@seq{\temp@a @}%
\fi%
\tcb@enlbreak@next@final%
}
\def\tcb@enlbreak@next@step{%
\edef\tcb@temp{\noexpand\tcb@enlbreak@next@scan\tcb@enlbreak@seq}%
\tcb@temp%
}
\def\tcb@enlbreak@init{%
\edef\tcb@enlbreak@seq{\kvtcb@enlargepage/@}%
\let\tcb@enlbreak@next=\tcb@enlbreak@next@step%
\tcb@enlbreak@next%
}
\def\tcb@breakat@next@scan#1/#2@{%
\def\temp@a{#2}%
\tcbdimto\tcb@breakat@dim{#1}%
\ifx\temp@a\@empty\relax%
\let\tcb@breakat@next=\@empty%
\else%
\edef\tcb@breakat@seq{\temp@a @}%
\fi%
}
\def\tcb@breakat@next@step{%
\edef\tcb@temp{\noexpand\tcb@breakat@next@scan\tcb@breakat@seq}%
\tcb@temp%
}
\def\tcb@breakat@init{%
\edef\tcb@breakat@seq{\kvtcb@breakatdim/@}%
\let\tcb@breakat@next=\tcb@breakat@next@step%
}
\newif\iftcb@multicol
\newif\iftcb@vfillbeforefirst
\def\tcb@do@nobreak@warning{%
\iftcb@ignorenobreak%
\tcb@warning{Using nobreak failed. You should set `ignore nobreak=false' to avoid this}%
\else%
\tcb@warning{Using nobreak failed. Try to enlarge `lines before break' or set page breaks manually}%
\fi%
}
\def\tcb@handle@nobreak{%
\tcb@enlbreak@init%
\tcb@breakat@init%
\tcb@comp@h@page%
\tcbdimto\tcb@h@page{\tcb@h@page-1.5\baselineskip-\parskip-\lineskip}% security surcharge
\tcb@comp@h@total@standalone%
\tcb@check@for@final@box%
\iftcb@final@box%
\else%
\ifdim\dimexpr\tcb@h@page-\tcb@h@padding-\tcb@h@padtitle<\kvtcb@breakminlines\baselineskip\relax%
\tcbdimto\tcb@h@page{\tcb@h@page+3.5\baselineskip+\parskip+\lineskip}%
\vspace{\tcb@h@page}%
{\parskip\z@\nointerlineskip\noindent}%
\vspace{-\tcb@h@page}%
\par%
\fi%
\fi%
}
\def\tcb@prepare@break@operation{%
\setcounter{tcbbreakpart}{0}%
\let\tcb@nobreak@warning\@empty%
\@ifundefined{columnbreak}{\tcb@multicolfalse}{%
\ifnum\doublecol@number>\z@\relax%
\tcb@multicoltrue%
\else%
\tcb@multicolfalse%
\fi}%
\ifx\kvtcb@float\@empty\relax%
\iftcb@nobreak%
\let\tcb@nobreak@warning\tcb@do@nobreak@warning%
\iftcb@ignorenobreak%
\kvtcb@beforebox%
\else%
\tcb@handle@nobreak%
\fi%
\else%
\kvtcb@beforebox%
\fi%
\def\kvtcb@beforebox{\parskip\z@\nointerlineskip\noindent}%
\noindent% applies parskip
\vskip\lineskip{\parskip\z@\par\vskip\z@}\bgroup\@nobreakfalse\addpenalty\z@\egroup% force update vertical list
\tcb@break@allowedtrue%
\tcb@enlbreak@init%
\else%
\tcb@break@allowedfalse%
\fi%
}
\def\tcb@height@fill@unbroken#1{%
\ifnum\c@tcblayer<2\relax%
\tcb@ignorenobreaktrue%
\tcb@prepare@break@operation%
\tcb@breakat@init%
\tcbset{compress page=#1}%
\tcb@comp@h@page%
\tcbset{height=\tcb@h@page-\kvtcb@bbtop@stand-\kvtcb@bbbottom@stand}%
\fi%
}
\def\tcb@height@fill@unbroken@normal{\tcb@height@fill@unbroken{none}}
\def\tcb@height@fill@unbroken@compressed{\tcb@height@fill@unbroken{all}}
\def\tcb@use@after@lastbox{\bgroup\tcb@after@lastbox\egroup}
\def\tcb@drawcolorbox@breakable{%
\tcbdimto\kvtcb@topsep{\kvtcb@topsep}%
\tcb@prepare@break@operation%
\global\let\tcb@after@lastbox=\kvtcb@afterbox%
\let\kvtcb@afterbox=\@empty%
\begingroup%
\parskip\z@skip%
\parindent\z@%
\lineskip\z@skip%
\topskip\z@skip%
\tcb@parfillskip@check%
\tcb@split@start%
\endgroup%
\color{.}% hack for some special cases
\ifx\kvtcb@float\@empty\relax%
\aftergroup\tcb@use@after@lastbox%
\fi%
}
\def\tcb@split@pagebreak{%
\iftcb@multicol\columnbreak\else\pagebreak\fi%
\tcb@nobreak@warning%
\tcb@enlbreak@init\tcb@break@allowedfalse%
}
\def\tcb@split@start{%
\tcb@breakat@init%
\tcb@comp@h@page%
% height calculation
\tcb@comp@h@total@standalone%
%
\let\tcb@split@next=\relax%
\tcb@check@for@final@box%
\iftcb@final@box%
\tcb@drawcolorbox@standalone%
\else%
\iftcb@break@allowed%
\ifdim\dimexpr\tcb@h@page-\tcb@h@padding-\tcb@h@padtitle<\kvtcb@breakminlines\baselineskip\relax%
\tcb@split@pagebreak%
\tcb@comp@h@page%
\tcb@check@for@final@box%
\iftcb@final@box%
\tcb@drawcolorbox@standalone%
\else%
\let\tcb@split@next=\tcb@split@first%
\fi%
\else%
\let\tcb@split@next=\tcb@split@first%
\fi%
\else%
\let\tcb@split@next=\tcb@split@first%
\fi%
\fi%
\tcb@split@next%
}
\def\tcb@setbox#1#2#3{%
\setbox#1=\vbox{\unvbox#3}%
\ifdim\dimexpr\ht#1+\dp#1>#2\relax%
%\tcb@warning{Splitted box part too large by \the\dimexpr\ht#1+\dp#1-#2\relax}% switched off (99% useless/annoying)
\setbox#1=\vbox to\the\dimexpr#2-\dp#1\relax{\unvbox#1}%
\fi%
}
\def\tcb@setbox@upper#1#2{%
\tcb@setbox\tcb@upperbox{#1}{#2}%
\tcbdimto\tcb@h@upper{\ht\tcb@upperbox+\dp\tcb@upperbox}%
}
\def\tcb@vsplit@upper{%
\setbox\tcb@upperbox=\vsplit\tcb@totalupperbox to\tcb@split@dim%
\edef\tcb@upper@box@badness{\the\badness}%
}
\def\tcb@split@upper@box@and@assemble{%
\vfuzz=\maxdimen\vbadness=10000\savingvdiscards=1%
\tcb@vsplit@upper%
\ifnum\tcb@upper@box@badness=1000000\relax%
\setbox\tcb@totalupperbox=\vbox{%
\unvbox\tcb@upperbox%
\splitdiscards%
\unvbox\tcb@totalupperbox}%
\else%
\tcb@setbox@upper{\tcb@split@dim}{\tcb@upperbox}%
\ifdim\dimexpr\tcb@h@upper=0pt\relax%
\setbox\tcb@totalupperbox=\vbox{%
\unvbox\tcb@upperbox%
\splitdiscards%
\unvbox\tcb@totalupperbox}%
\def\tcb@upper@box@badness{1000000}%
\fi%
\fi%
\vbadness=\tcb@thevbadness\vfuzz=\tcb@thevfuzz\savingvdiscards=0%
}
\def\tcb@split@upper@box{%
\vfuzz=\maxdimen\vbadness=10000%
\tcb@vsplit@upper%
\ifnum\tcb@upper@box@badness=1000000\relax%
\tcb@warning{The upper box part has become overfull}%
\fi%
\tcb@setbox@upper{\tcb@split@dim}{\tcb@upperbox}%
\vbadness=\tcb@thevbadness\vfuzz=\tcb@thevfuzz%
}
\def\tcb@setbox@lower#1#2{%
\tcb@setbox\tcb@lowerbox{#1}{#2}%
\tcbdimto\tcb@h@lower{\ht\tcb@lowerbox+\dp\tcb@lowerbox}%
}
\def\tcb@vsplit@lower{%
\setbox\tcb@lowerbox=\vsplit\tcb@totallowerbox to\tcb@split@dim%
\edef\tcb@lower@box@badness{\the\badness}%
}
\def\tcb@split@lower@box@and@assemble{%
\vfuzz=\maxdimen\vbadness=10000\savingvdiscards=1%
\tcb@vsplit@lower%
\ifnum\tcb@lower@box@badness=1000000\relax%
\setbox\tcb@totallowerbox=\vbox{%
\unvbox\tcb@lowerbox%
\splitdiscards%
\unvbox\tcb@totallowerbox}%
\else%
\tcb@setbox@lower{\tcb@split@dim}{\tcb@lowerbox}%
\ifdim\dimexpr\tcb@h@lower=0pt\relax%
\setbox\tcb@totallowerbox=\vbox{%
\unvbox\tcb@lowerbox%
\splitdiscards%
\unvbox\tcb@totallowerbox}%
\def\tcb@lower@box@badness{1000000}%
\fi%
\fi%
\vbadness=\tcb@thevbadness\vfuzz=\tcb@thevfuzz\savingvdiscards=0%
}
\def\tcb@split@lower@box{%
\vfuzz=\maxdimen\vbadness=10000%
\tcb@vsplit@lower%
\ifnum\tcb@lower@box@badness=1000000\relax%
\tcb@warning{The lower box part has become overfull}%
\fi%
\tcb@setbox@lower{\tcb@split@dim}{\tcb@lowerbox}%
\vbadness=\tcb@thevbadness\vfuzz=\tcb@thevfuzz%
}
% patch for luatex 0.95 (thanks to Jeremy Engel)
\ifdefined\directlua
\RequirePackage{ifluatex}
\ifnum\luatexversion=95\relax
\def\tcb@vsplit@upper{%
\directlua{%
tex.savingvdiscards = 1
local vlist = tex.splitbox("tcb@totalupperbox", tex.sp("\tcb@split@dim"), "exactly")
tex.setbox("tcb@upperbox", vlist)
tex.savingvdiscards = 0
}%
\edef\tcb@upper@box@badness{\the\badness}%
}
\def\tcb@vsplit@lower{%
\directlua{%
tex.savingvdiscards = 1
local vlist = tex.splitbox("tcb@totallowerbox", tex.sp("\tcb@split@dim"), "exactly")
tex.setbox("tcb@lowerbox", vlist)
tex.savingvdiscards = 0
}%
\edef\tcb@lower@box@badness{\the\badness}%
}
\fi\fi
\def\tcb@split@setstate@first{%
\edef\tcb@split@state{first}%
\let\kvtcb@top@rule=\kvtcb@top@rule@stand%
\let\kvtcb@bottom@rule=\kvtcb@bottom@rule@break%
\let\kvtcb@bbtop=\kvtcb@bbtop@stand%
\let\kvtcb@bbbottom=\kvtcb@bbbottom@break%
\let\tcb@break@topsep=\tcb@zpt%
\let\tcb@break@bottomsep=\kvtcb@bottomsep%
}
\def\tcb@split@setstate@middle{%
\edef\tcb@split@state{middle}%
\let\kvtcb@top@rule=\kvtcb@top@rule@break%
\let\kvtcb@bottom@rule=\kvtcb@bottom@rule@break%
\let\kvtcb@bbtop=\kvtcb@bbtop@break%
\let\kvtcb@bbbottom=\kvtcb@bbbottom@break%
\let\tcb@break@topsep=\kvtcb@topsep%
\let\tcb@break@bottomsep=\kvtcb@bottomsep%
}
\def\tcb@split@setstate@last{%
\edef\tcb@split@state{last}%
\let\kvtcb@top@rule=\kvtcb@top@rule@break%
\let\kvtcb@bottom@rule=\kvtcb@bottom@rule@stand%
\let\kvtcb@bbtop=\kvtcb@bbtop@break%
\let\kvtcb@bbbottom=\kvtcb@bbbottom@stand%
\let\tcb@break@topsep=\kvtcb@topsep%
\let\tcb@break@bottomsep=\tcb@zpt%
}
\def\tcb@split@force@standalone{%
\tcb@comp@h@total@standalone%
\ifdim\tcb@h@total>\tcb@h@page\relax%
\tcbdimto\kvtcb@bbbottom@stand{\kvtcb@bbbottom@stand+\tcb@h@page-\tcb@h@total}%
\fi%
}
\def\tcb@split@break@to@start{%
\tcb@swap{\tcb@totalupperbox}{\tcb@upperbox}%
\tcb@swap{\tcb@totallowerbox}{\tcb@lowerbox}%
\tcbdimto\tcb@h@upper{\ht\tcb@upperbox+\dp\tcb@upperbox}%
\tcbdimto\tcb@h@lower{\ht\tcb@lowerbox+\dp\tcb@lowerbox}%
\tcb@split@pagebreak%
\let\tcb@split@next=\tcb@split@start%
}
\def\tcb@split@first{%
\setcounter{tcbbreakpart}{1}%
\ifx\kvtcb@float\@empty\relax%
\iftcb@vfillbeforefirst%
\let\tcb@before@first=\vfill%
\else%
\let\tcb@before@first=\@empty%
\fi%
\let\tcb@before@middle=\@empty%
\let\tcb@before@last=\@empty%
\iftcb@multicol%
\long\def\tcb@after@first{\par}% using \columnbreak here kills multicols' algorithm sometimes
\long\def\tcb@after@middle{\par\vfill}%
\else%
\long\def\tcb@after@first{\par\pagebreak\tcb@enlbreak@next}%
\long\def\tcb@after@middle{\par\vfill\eject\tcb@enlbreak@next}%
\fi%
\let\tcb@after@last=\par%
\else%
\edef\tcb@before@first{\noexpand\tcb@float@env@begin{tcbfloat}[\kvtcb@float]\noexpand\kvtcb@everyfloat}%
\let\tcb@before@middle=\tcb@before@first%
\let\tcb@before@last=\tcb@before@first%
\let\tcb@after@first=\tcb@float@env@end%
\let\tcb@after@middle=\tcb@float@env@end%
\let\tcb@after@last=\tcb@float@env@end%
\fi%
%
\edef\kvtcb@skin@@first{\kvtcb@skin@first}%
\edef\kvtcb@skin@@middle{\kvtcb@skin@middle}%
\edef\kvtcb@skin@@last{\kvtcb@skin@last}%
%
\let\tcb@h@breaksep@first=\kvtcb@bottomsep%
\tcbdimto\tcb@h@breaksep@middle{\kvtcb@bottomsep+\kvtcb@topsep}%
\let\tcb@h@breaksep@last=\kvtcb@topsep%
\tcbdimto\tcb@h@padding@first{\kvtcb@bbtop@stand+\kvtcb@bbbottom@break+\kvtcb@top@rule@stand+\kvtcb@bottom@rule@break+\tcb@h@breaksep@first+\kvtcb@boxsep*2+\kvtcb@top+\kvtcb@bottom}%
\tcbdimto\tcb@h@padding@middle{\kvtcb@bbtop@break+\kvtcb@bbbottom@break+\kvtcb@top@rule@break+\kvtcb@bottom@rule@break+\tcb@h@breaksep@middle+\kvtcb@boxsep*2+\kvtcb@top+\kvtcb@bottom}%
\tcbdimto\tcb@h@padding@last{\kvtcb@bbtop@break+\kvtcb@bbbottom@stand+\kvtcb@top@rule@break+\kvtcb@bottom@rule@stand+\tcb@h@breaksep@last+\kvtcb@boxsep*2+\kvtcb@top+\kvtcb@bottom}%
%
\tcb@split@setstate@first%
%
\splittopskip=0pt%
\splitmaxdepth=0pt%
\edef\tcb@thevfuzz{\the\vfuzz}%
\edef\tcb@thevbadness{\the\vbadness}%
%
\tcb@swap{\tcb@totalupperbox}{\tcb@upperbox}%
\tcb@swap{\tcb@totallowerbox}{\tcb@lowerbox}%
%
\let\tcb@split@next=\relax%
\tcbdimto\tcb@split@dim{\tcb@h@page-\tcb@h@padding@first-\tcb@h@padtitle}%
\ifdim\tcb@split@dim<\tcb@h@upper\relax%
%
%
\iftcb@break@allowed%
\tcb@split@upper@box@and@assemble%
\ifnum\tcb@upper@box@badness=1000000\relax%
\tcb@split@break@to@start%
\else%
\ifdim\wd\tcb@totalupperbox=0pt\relax%
\iftcb@lowerspace%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@SL%
\else%
\tcb@split@force@standalone%
\tcb@drawcolorbox@standalone%
\fi%
\else%
%\ifdim\dimexpr\tcb@h@upper=0pt\relax%
% \tcb@warning{Discard zero height first box part due to break problems (possible loss of zero height content)}%
% \tcb@split@break@to@start%
%\else%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@USL%
%\fi%
\fi%
\fi%
\else%
\tcb@split@upper@box%
\ifdim\wd\tcb@totalupperbox=0pt\relax%
\iftcb@lowerspace%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@SL%
\else%
\tcb@split@force@standalone%
\tcb@drawcolorbox@standalone%
\fi%
\else%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@USL%
\fi%
\fi%
\else%
\tcb@swap{\tcb@totalupperbox}{\tcb@upperbox}%
\iftcb@lowerspace%
\tcbdimto\tcb@split@dim{\tcb@split@dim-\tcb@h@upper-\tcb@h@segment}%
\ifdim\tcb@split@dim<\kvtcb@breakminlines\baselineskip\relax%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@SL%
\else
\tcb@split@lower@box@and@assemble%
\ifnum\tcb@lower@box@badness=1000000\relax%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@SL%
\else%
\ifdim\wd\tcb@totallowerbox=0pt\relax%
\tcb@split@force@standalone%
\tcb@drawcolorbox@standalone%
\else%
\tcb@sdraw@USL%
\let\tcb@split@next=\tcb@split@L%
\fi%
\fi%
\fi%
\else%
\tcb@split@force@standalone%
\tcb@drawcolorbox@standalone%
\fi%
\fi%
\tcb@split@next%
}
\def\tcb@split@force@last{%
\tcb@split@setstate@last%
\ifdim\tcb@h@total>\tcb@h@page\relax%
\gdef\tcb@after@lastbox{\clearpage}%
\tcbdimto\kvtcb@bbbottom{\kvtcb@bbbottom+\tcb@h@page-\tcb@h@total}%
\fi%
}
\def\tcb@nextbreakpart{%
\stepcounter{tcbbreakpart}%
\tcb@count@boxes%
\iftcb@checkpage%
\tcb@phantom@savepage%
\tcb@hasPhantomtrue%
\sbox\tcb@phantombox{\kvtcb@phantom}%
\let\kvtcb@phantom\@empty%
\fi%
\tcb@following@title%
}
\def\tcb@split@USL{%
\tcb@nextbreakpart%
\tcb@comp@h@page%
\tcb@defToTotalHeight\tcb@h@upper{\tcb@totalupperbox}%
\tcbdimto\tcb@h@total{\tcb@h@padding@last+\tcb@h@padtitle+\tcb@h@upper+\tcb@h@segment+\tcb@h@lower}%
%
\let\tcb@split@next=\relax%
\tcb@check@for@final@box%
\iftcb@final@box%
\tcb@split@setstate@last%
\tcb@setbox@upper{\tcb@h@upper}{\tcb@totalupperbox}%
\iftcb@lowerspace%
\tcb@setbox@lower{\tcb@h@lower}{\tcb@totallowerbox}%
\tcb@sdraw@USL%
\else
\tcb@sdraw@U%
\fi%
\else
\tcb@split@setstate@middle%
\tcbdimto\tcb@split@dim{\tcb@h@page-\tcb@h@padding@middle-\tcb@h@padtitle}%
\ifdim\tcb@split@dim<\tcb@h@upper\relax%
\tcb@split@upper@box%
\ifdim\wd\tcb@totalupperbox=0pt\relax%
\iftcb@lowerspace%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@SL%
\else%
\tcb@split@force@last%
\tcb@sdraw@U%
\fi%
\else%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@USL%
\fi%
\else%
\tcb@setbox@upper{\tcb@h@upper}{\tcb@totalupperbox}%
\iftcb@lowerspace%
\tcbdimto\tcb@split@dim{\tcb@split@dim-\tcb@h@upper-\tcb@h@segment}
\ifdim\tcb@split@dim<\kvtcb@breakminlines\baselineskip\relax%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@SL%
\else
\tcb@split@lower@box@and@assemble%
\ifnum\tcb@lower@box@badness=1000000\relax%
\tcb@sdraw@U%
\let\tcb@split@next=\tcb@split@SL%
\else%
\ifdim\wd\tcb@totallowerbox=0pt\relax%
\tcb@split@force@last%
\tcb@sdraw@USL%
\else%
\tcb@sdraw@USL%
\let\tcb@split@next=\tcb@split@L%
\fi%
\fi%
\fi%
\else%
\tcb@split@force@last%
\tcb@sdraw@U%
\fi%
\fi%
\fi%
\tcb@split@next%
}
\def\tcb@split@SL@displayed{%
\tcb@nextbreakpart%
\tcb@comp@h@page%
\let\tcb@h@upper=\tcb@zpt%
\tcb@defToTotalHeight\tcb@h@lower{\tcb@totallowerbox}%
\tcbdimto\tcb@h@total{\tcb@h@padding@last-\kvtcb@top-\kvtcb@boxsep+\tcb@h@padtitle+\tcb@h@segment+\tcb@h@lower}%
%
\let\tcb@split@next=\relax%
\tcb@check@for@final@box%
\iftcb@final@box%
\tcb@split@setstate@last%
\tcb@setbox@lower{\tcb@h@lower}{\tcb@totallowerbox}%
\tcb@sdraw@SL%
\else
\tcb@split@setstate@middle%
\tcbdimto\tcb@split@dim{\tcb@h@page-\tcb@h@padding@middle+\kvtcb@top+\kvtcb@boxsep-\tcb@h@padtitle-\tcb@h@segment}%
\tcb@split@lower@box%
\ifdim\wd\tcb@totallowerbox=0pt\relax%
\tcb@split@force@last%
\tcb@sdraw@SL%
\else
\tcb@sdraw@SL%
\let\tcb@split@next=\tcb@split@L%
\fi%
\fi%
\tcb@split@next%
}
\def\tcb@split@L{%
\tcb@nextbreakpart%
\tcb@comp@h@page%
\let\tcb@h@upper=\tcb@zpt%
\tcb@defToTotalHeight\tcb@h@lower{\tcb@totallowerbox}%
\tcbdimto\tcb@h@total{\tcb@h@padding@last+\tcb@h@padtitle+\tcb@h@lower}%
%
\let\tcb@split@next=\relax%
\tcb@check@for@final@box%
\iftcb@final@box%
\tcb@split@setstate@last%
\tcb@setbox@lower{\tcb@h@lower}{\tcb@totallowerbox}%
\tcb@sdraw@L%
\else
\tcb@split@setstate@middle%
\tcbdimto\tcb@split@dim{\tcb@h@page-\tcb@h@padding@middle-\tcb@h@padtitle}%
\tcb@split@lower@box%
\ifdim\wd\tcb@totallowerbox=0pt\relax%
\tcb@split@force@last%
\tcb@sdraw@L%
\else
\tcb@sdraw@L%
\let\tcb@split@next=\tcb@split@L%
\fi%
\fi%
\tcb@split@next%
}
\def\tcb@break@ch@fixed{%
\ifdim\tcb@natheight<\tcb@h@page\relax%
\tcbdimto\kvtcb@height@fixed{\tcb@h@page-\kvtcb@bbtop-\kvtcb@bbbottom}%
\tcb@ch@fixed%
\else%
\tcb@ch@natural%
\fi%
}
\def\tcb@sdraw@USL{%
\begingroup%
\tcbset{skin=\csname kvtcb@skin@@\tcb@split@state\endcsname}%
\csuse{tcb@extras@\tcb@split@state}%
\tcb@afteroptions@hook%
\def\tcbsegmentstate{1}%
\tcbdimto\tcb@natheight{\tcb@h@padtitle+\kvtcb@top@rule+\kvtcb@bottom@rule+\kvtcb@boxsep*2+\kvtcb@top+\kvtcb@bottom+\tcb@h@upper+\tcb@h@segment+\tcb@h@lower+\csname tcb@h@breaksep@\tcb@split@state\endcsname}%
\csname tcb@break@ch@\tcb@split@state\endcsname%
\tcbdimto\tcb@innerheight{\tcb@height-\kvtcb@top@rule-\kvtcb@bottom@rule-\tcb@h@padtitle}%
\tcbdimto\tcbtextheight{\tcb@innerheight-\kvtcb@boxsep*2-\kvtcb@top-\kvtcb@bottom}%
\tcb@drawing@env@begin%
\tcb@extensions@preframe%
% draw frame and interior
\tcb@adraw@frame%
\tcb@adraw@interior%
\iftcb@lowerseparated%
\tcb@segmentation@code%
\fi%
\tcb@adraw@title%
\tcb@extensions@postframe%
% draw text boxes
\tcb@tdraw@title%
\tcb@tdraw@upper%
\tcb@tdraw@lower%
\tcb@extensions@final%
\tcb@drawing@env@end%
\endgroup%
}
\def\tcb@sdraw@U{%
\begingroup%
\tcbset{skin=\csname kvtcb@skin@@\tcb@split@state\endcsname}%
\csuse{tcb@extras@\tcb@split@state}%
\tcb@afteroptions@hook%
\def\tcbsegmentstate{0}%
\tcbdimto\tcb@natheight{\tcb@h@padtitle+\kvtcb@top@rule+\kvtcb@bottom@rule+\kvtcb@boxsep*2+\kvtcb@top+\kvtcb@bottom+\tcb@h@upper+\csname tcb@h@breaksep@\tcb@split@state\endcsname}%
\csname tcb@break@ch@\tcb@split@state\endcsname%
\tcbdimto\tcb@innerheight{\tcb@height-\kvtcb@top@rule-\kvtcb@bottom@rule-\tcb@h@padtitle}%
\tcbdimto\tcbtextheight{\tcb@innerheight-\kvtcb@boxsep*2-\kvtcb@top-\kvtcb@bottom}%
\tcb@drawing@env@begin%
\tcb@extensions@preframe%
% draw frame and interior
\tcb@adraw@frame%
\tcb@adraw@interior%
\tcb@adraw@title%
\tcb@extensions@postframe%
% draw text boxes
\tcb@tdraw@title%
\tcb@tdraw@upper%
\tcb@extensions@final%
\tcb@drawing@env@end%
\endgroup%
}
\def\tcb@sdraw@SL{%
\begingroup%
\tcbset{skin=\csname kvtcb@skin@@\tcb@split@state\endcsname}%
\csuse{tcb@extras@\tcb@split@state}%
\tcb@afteroptions@hook%
\def\tcbsegmentstate{1}%
\tcbdimto\tcb@natheight{\tcb@h@padtitle+\kvtcb@top@rule+\kvtcb@bottom@rule+\kvtcb@bottom+\kvtcb@boxsep+\tcb@h@segment+\tcb@h@lower+\csname tcb@h@breaksep@\tcb@split@state\endcsname}%
\csname tcb@break@ch@\tcb@split@state\endcsname%
\tcbdimto\tcb@innerheight{\tcb@height-\kvtcb@top@rule-\kvtcb@bottom@rule-\tcb@h@padtitle}%
\tcbdimto\tcbtextheight{\tcb@innerheight-\kvtcb@boxsep*2-\kvtcb@top-\kvtcb@bottom}%
\tcb@drawing@env@begin%
\tcb@extensions@preframe%
% draw frame and interior
\tcb@adraw@frame%
\tcb@adraw@interior%
\iftcb@lowerseparated%
\tcb@segmentation@code%
\fi%
\tcb@adraw@title%
\tcb@extensions@postframe%
% draw text boxes
\tcb@tdraw@title%
\tcb@tdraw@lower%
\tcb@extensions@final%
\tcb@drawing@env@end%
\endgroup%
}
\def\tcb@sdraw@L{%
\begingroup%
\tcbset{skin=\csname kvtcb@skin@@\tcb@split@state\endcsname}%
\csuse{tcb@extras@\tcb@split@state}%
\tcb@afteroptions@hook%
\def\tcbsegmentstate{2}%
\tcbdimto\tcb@natheight{\tcb@h@padtitle+\kvtcb@top@rule+\kvtcb@bottom@rule+\kvtcb@boxsep*2+\kvtcb@top+\kvtcb@bottom+\ht\tcb@lowerbox+\dp\tcb@lowerbox+\csname tcb@h@breaksep@\tcb@split@state\endcsname}%
\csname tcb@break@ch@\tcb@split@state\endcsname%
\tcbdimto\tcb@innerheight{\tcb@height-\kvtcb@top@rule-\kvtcb@bottom@rule-\tcb@h@padtitle}%
\tcbdimto\tcbtextheight{\tcb@innerheight-\kvtcb@boxsep*2-\kvtcb@top-\kvtcb@bottom}%
\tcb@drawing@env@begin%
\tcb@extensions@preframe%
% draw frame and interior
\tcb@adraw@frame%
\tcb@adraw@interior%
\tcb@adraw@title%
\tcb@extensions@postframe%
% draw text boxes
\tcb@tdraw@title%
\tcb@tdraw@lower%
\tcb@extensions@final%
\tcb@drawing@env@end%
\endgroup%
}
\def\tcb@init@breakable{%
\let\tcb@savebox=\tcb@vbox%
\let\endtcb@savebox=\endtcb@vbox%
\let\tcb@drawcolorbox=\tcb@drawcolorbox@breakable%
\iftcb@usecolorstack%
\def\tcb@upperdraw@begin@hook{\pdfcolSetCurrent{tcb@breakable}}%
\def\tcb@lowerdraw@begin@hook{\pdfcolSetCurrent{tcb@breakable}}%
\else%
\def\tcb@upperdraw@begin@hook{\color{tcbcolupper}}%
\def\tcb@lowerdraw@begin@hook{\color{tcbcollower}}%
\fi%
}
\tcbset{%
breakable@true/.code={%
\tcb@isbreakabletrue%
\tcb@sidebysidefalse%
\let\tcb@defToTotalHeight=\tcb@defToTotalHeightBreakable},
breakable@unlimited/.code={%
\tcb@isbreakabletrue%
\tcb@sidebysidefalse%
\let\tcb@defToTotalHeight=\tcb@defToTotalHeightUnlimited},
breakable/.style={breakable@#1},
breakable/.default=true,%
unbreakable/.style={breakable=false},%
enforce breakable/.code={%
\tcb@isbreakabletrue%
\tcb@sidebysidefalse%
\let\tcb@defToTotalHeight=\tcb@defToTotalHeightBreakable},
title after break/.store in=\kvtcb@followingtitle,%
notitle after break/.style={title after break=},%
adjusted title after break/.style={title after break={#1\vphantom{\kvtcb@adjusttext}}},%
lines before break/.store in=\kvtcb@breakminlines,%
shrink break goal/.store in=\kvtcb@shrinkbreakgoal,%
toprule at break/.store in=\kvtcb@top@rule@break,
bottomrule at break/.store in=\kvtcb@bottom@rule@break,
topsep at break/.store in=\kvtcb@topsep,%
bottomsep at break/.store in=\kvtcb@bottomsep,%
pad before break/.code={\let\kvtcb@bottom@rule@break=\tcb@zpt%
\tcbdimto\kvtcb@bottomsep{#1-\kvtcb@bottom-\kvtcb@boxsep}},%
pad before break*/.style={pad before break={#1},%
code={\tcbdimto\tcb@temp{\kvtcb@bottom@rule@stand-\kvtcb@bottomsep}%
\ifdim\tcb@temp>0pt\relax%
\tcbdimto\kvtcb@enlargepage@flex{\kvtcb@enlargepage@flex+\tcb@temp}\fi}},%
pad after break/.code={\let\kvtcb@top@rule@break=\tcb@zpt%
\def\kvtcb@topsep{#1-\kvtcb@top-\kvtcb@boxsep}},%
pad at break/.style={pad before break={#1},pad after break={#1}},%
pad at break*/.style={pad before break*={#1},pad after break={#1}},%
enlargepage/.store in=\kvtcb@enlargepage,%
enlargepage flexible/.store in=\kvtcb@enlargepage@flex,%
break at/.store in=\kvtcb@breakatdim,%
height fixed for/.is choice,%
height fixed for/none/.code={%
\let\tcb@break@ch@first=\tcb@ch@natural%
\let\tcb@break@ch@middle=\tcb@ch@natural%
\let\tcb@break@ch@last=\tcb@ch@natural},%
height fixed for/first/.code={%
\let\tcb@break@ch@first=\tcb@break@ch@fixed%
\let\tcb@break@ch@middle=\tcb@ch@natural%
\let\tcb@break@ch@last=\tcb@ch@natural},%
height fixed for/middle/.code={%
\let\tcb@break@ch@first=\tcb@ch@natural%
\let\tcb@break@ch@middle=\tcb@break@ch@fixed%
\let\tcb@break@ch@last=\tcb@ch@natural},%
height fixed for/last/.code={%
\let\tcb@break@ch@first=\tcb@ch@natural%
\let\tcb@break@ch@middle=\tcb@ch@natural%
\let\tcb@break@ch@last=\tcb@break@ch@fixed},%
height fixed for/first and middle/.code={%