Der folgende Code erzeugt eine schöne Box um eine Gleichung oder ein paar Textzeilen, setzt die Boxen auf der nächsten Seite jedoch mit einer absurden horizontalen Linie fort. Natürlich kann ich diesen haarsträubenden Seitenumbruch beseitigen, indem ich
nobreak=true,
zu \newmdenv; aber für andere, größere Boxen brauche ich Seitenumbrüche. Daher brauche ich eine andere Lösung, um dieses unerwünschte Verhalten von mdframed zu beheben.
Hier das Codebeispiel, so minimal wie ich es hinbekommen habe:
\documentclass[a4paper,11pt,fleqn]{report}
\setlength{\headheight}{15pt}
\setlength{\textheight}{430pt}
\renewcommand{\arraystretch}{1.3}
\usepackage{amsmath}
\usepackage[bold-style=ISO]{unicode-math} % must come after ams and symbols
\usepackage{xcolor}
\usepackage{mdframed}
\newmdenv[
usetwoside=false,
skipabove=3pt minus 1pt plus 3pt,
skipbelow=3pt minus 1pt plus 3pt,
leftmargin=-4pt,
rightmargin=-4pt,
innerleftmargin=2pt,
innerrightmargin=2pt,
innertopmargin=4pt,
innerbottommargin=4pt,
backgroundcolor=\boxcolor!20,
topline=false,
bottomline=false,
linecolor=\boxcolor,
linewidth=2pt,
]{aux*}
\newenvironment{mybox} {\begin{aux*}} {\end{aux*}}
\begin{document}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
and now the problematic box
\def\boxcolor{green}
\begin{mybox}%
\begin{equation}\label{Edwba}
\sum
\end{equation}%
\end{mybox}
See just above the nonsensical line produced by mdframed!
\begin{equation}ab\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}ab\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}ab\end{equation}
\begin{equation}ab\end{equation}
\def\boxcolor{red}
\begin{mybox}%
Here comes an example with three lines of text in the box.
Three lines is a lot of text bla bla bla bla bla bla blaaa.
Three lines is a lot of text bla bla bla bla bla bla blaaa.
\end{mybox}
See again the scandalous page break.
\end{document}
Und hier die Screenshots der generierten drei Seiten:
--
--
Antwort1
Das Paket erkennt dies und warnt, dass das letzte Frame-Segment am Seitenumbruch leer ist. Es gibt das Segment jedoch aus, da Sie sonst nicht die endgültige Begrenzung des Frames erhalten würden.
hier gibt es allerdings nur Seitenränder, daher ist es (glaube ich, ich kenne den Code nicht so gut) sicher, das letzte Segment einfach zu verwerfen. Zumindest hier scheint es zu funktionieren. (Siehe die beiden markierten Stellen CHANGE)
\documentclass[a4paper,11pt,fleqn]{report}
\setlength{\headheight}{15pt}
\setlength{\textheight}{430pt}
\renewcommand{\arraystretch}{1.3}
\usepackage{amsmath}
\usepackage[bold-style=ISO]{unicode-math} % must come after ams and symbols
\usepackage{xcolor}
\usepackage{mdframed}
\makeatletter
\def\mdf@put@frame@ii{%
\setlength{\mdf@freevspace@length}{\vsize}%
\ifbool{mdf@repeatframetitle}%
{%repeating title -- more robust using hooks.
\toggletrue{mdf@notfirstframetitle}%
\splitmaxdepth\z@ \splittopskip\z@%
\setbox\mdf@splitbox@one=\vbox{\break\unvbox\mdf@splitbox@one}%
\mdf@ignorevbadness%
\setbox0=\vsplit\mdf@splitbox@one to \z@\relax%
\setbox\mdf@splitbox@one=\vbox{\unvbox\mdf@splitbox@one}%
\setbox\mdf@splitbox@one\vbox%
{%
\parskip\z@\relax%
\parindent\z@\relax%
\vskip\mdf@frametitleaboveskip@length%
\unvcopy\mdf@frametitlebox\relax%
\mdf@@frametitlerule\relax%
\unvbox\mdf@splitbox@one\relax%
}%
\setbox\mdf@splitbox@one=\vbox{\unvbox\mdf@splitbox@one}%
}{}%
\setlength{\dimen@}{\dimexpr\ht\mdf@splitbox@one+\dp\mdf@splitbox@one\relax}%
\mdf@dolist{\mdf@advancelength@add{\dimen@}}%
{innerbottommargin,innerlinewidth,middlelinewidth,outerlinewidth}%
\ifboolexpr { bool {mdf@everyline} and bool {mdf@topline} }%
{%
\mdf@dolist{\mdf@advancelength@add{\dimen@}}%
{innerlinewidth,middlelinewidth,outerlinewidth}%
}{}%
\notbool{mdf@bottomline}%remove bottom if neccessary
{%
\mdf@dolist{\mdf@advancelength@sub{\dimen@}}%
{innerlinewidth,middlelinewidth,outerlinewidth}%
}{}%
\ifdimgreater{\dimen@}{\mdf@freevspace@length}%
{%have a middle box
\advance\mdf@freevspace@length by -\mdf@splitbottomskip@length\relax%
\ifbool{mdf@everyline}%regard top and bottom if everyline is used
{%
\ifbool{mdf@topline}%
{%
\mdf@dolist{\mdf@advancelength@sub{\mdf@freevspace@length}}%
{innerlinewidth,middlelinewidth,outerlinewidth}%
}{}%
\ifbool{mdf@bottomline}%
{%
\mdf@dolist{\mdf@advancelength@sub{\mdf@freevspace@length}}%
{innerlinewidth,middlelinewidth,outerlinewidth}%
}{}%
}{}%
\setbox\mdf@splitbox@save=\vbox{\unvcopy\mdf@splitbox@one}%
\splitmaxdepth\z@ \splittopskip\mdf@splittopskip@length%
\mdf@ignorevbadness%
\setbox\mdf@splitbox@two\vsplit\mdf@splitbox@one to \mdf@freevspace@length%
\setbox\mdf@splitbox@two\vbox{\unvbox\mdf@splitbox@two}%
\setbox\mdf@splitbox@one\vbox{\unvbox\mdf@splitbox@one}%
\ifdimgreater{\ht\mdf@splitbox@two+\dp\mdf@splitbox@two}%
{\mdf@freevspace@length}%
{%splitted wrong
\mdf@PackageInfo{Box was splittet wrong^^J
starting loop to iterate
the splitting point\MessageBreak}%
\dimen@i=\mdf@freevspace@length%\relax
\@tempcnta=\z@\relax
\loop
\ifdim\dimexpr\ht\mdf@splitbox@two+\dp\mdf@splitbox@two\relax>%
\mdf@freevspace@length\relax
\advance\dimen@i by -\p@\relax%
\advance\@tempcnta by \@ne\relax%
\ifnum\@tempcnta>100
\let\iterate\relax%
\mdf@PackageWarning{correct box splittet fails^^J
It seems you are using a non splittable
contents\MessageBreak}%
\fi
\mdf@ignorevbadness%
\setbox\mdf@splitbox@one=\vbox{\unvcopy\mdf@splitbox@save}%
\splitmaxdepth\z@ \splittopskip\mdf@splittopskip@length%
\mdf@ignorevbadness%
\setbox\mdf@splitbox@two\vsplit\mdf@splitbox@one to \dimen@i\relax%
\setbox\mdf@splitbox@two\vbox{\unvbox\mdf@splitbox@two}%
\setbox\mdf@splitbox@one\vbox{\unvbox\mdf@splitbox@one}%
\repeat%
}{}%
\ifvoid\mdf@splitbox@one\relax%
\mdf@PackageWarning{You got a bad break because the splittet box is
empty^^J
You have to change the page settings^^J
like enlargethispage or something else^^J
the package increases do
\enlargethispage{\baselineskip}\MessageBreak}%
\setbox\mdf@splitbox@one=\vbox{\unvcopy\mdf@splitbox@save}%
\enlargethispage{\baselineskip}%
\def\mdf@reserved@a{\mdf@put@frame@ii}%
\else
\setbox\mdf@splitbox@two=\vbox%
{%
\hrule \@height\z@ \@width\mdfboundingboxwidth\relax%
\unvcopy\mdf@splitbox@two%
}%
\begingroup%
\mdf@@setzref%
\booltrue{mdfmiddleframe}%
\mdf@beforebreak%
\mdf@putbox@middle%
\mdf@afterbreak%
\endgroup%
\hrule \@height\z@ \@width\hsize%
\vfill\eject%
\def\mdf@reserved@a{\mdf@put@frame@ii}%
\fi
}%End middle box case
{%start last box case
\ifvoid\mdf@splitbox@one
\mdf@PackageWarning{You got a bad break\MessageBreak
because the last split box is empty\MessageBreak
You have to change the settings1}%%
%CHANGE: leave final box as void
\iffalse
\setbox\mdf@splitbox@one=\vbox%
{%
\unvbox\mdf@splitbox@one%
\hrule \@height\z@ \@width\mdfboundingboxwidth
}%
\fi
%end CHANGE
\fi%
\ifdimless{\ht\mdf@splitbox@one}{1sp}%
{%
\mdf@PackageWarning{You got a bad break\MessageBreak
because the last split box is empty\MessageBreak
You have to change the settings2}%
\let\mdf@reserved@a\relax%
%CHANGE: add discard final box
\iffalse
\setbox\mdf@splitbox@one=\vbox%
{%
\unvbox\mdf@splitbox@one%
\hrule \@height\z@ \@width\mdfboundingboxwidth
}%
\fi
%END CHANGE
\setbox\mdf@splitbox@one\box\voidb@x
}{}%
\begingroup%
\toggletrue{mdflastframe}%
\mdf@beforebreak%
\begingroup%
\mdf@@setzref%
\booltrue{mdflastframe}%
\mdf@beforelastframe%
\mdf@putbox@second%
\mdf@afterlastframe%
\endgroup%
\hrule \@height\z@ \@width\hsize%
\mdf@afterbreak%
\endgroup%
\let\mdf@reserved@a\relax%
}%
\mdf@reserved@a%
}
\makeatother
\newmdenv[
usetwoside=false,
skipabove=3pt minus 1pt plus 3pt,
skipbelow=3pt minus 1pt plus 3pt,
leftmargin=-4pt,
rightmargin=-4pt,
innerleftmargin=2pt,
innerrightmargin=2pt,
innertopmargin=4pt,
innerbottommargin=4pt,
backgroundcolor=\boxcolor!20,
topline=false,
bottomline=false,
linecolor=\boxcolor,
linewidth=2pt,
]{aux*}
\newenvironment{mybox} {\begin{aux*}} {\end{aux*}}
\begin{document}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
and now the problematic box
\def\boxcolor{green}
\begin{mybox}%
\begin{equation}\label{Edwba}
\sum
\end{equation}%
\end{mybox}
See just above the nonsensical line produced by mdframed!
\begin{equation}ab\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}\frac{a}{b}\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}ab\end{equation}
Mix text and equation to insert lots of glue
\begin{equation}ab\end{equation}
\begin{equation}ab\end{equation}
\def\boxcolor{red}
\begin{mybox}%
Here comes an example with three lines of text in the box.
Three lines is a lot of text bla bla bla bla bla bla blaaa.
Three lines is a lot of text bla bla bla bla bla bla blaaa.
\end{mybox}
See again the scandalous page break.
\end{document}