By default, LaTeX allows a page break after the first two lines of paragraphs following section/subsection headings. How can I enlarge this minimum to, say, three lines or 10 percent of the value of \textheight?
[Tex/LaTex] Avoiding page breaks shortly after section/subsection headings
e-texpage-breakingsectioningsections-paragraphs
Related Solutions
The following patch (via etoolbox) saves the sectional content (number, title and font) in a macro that is re-evaluated at page shipout (as supplied by everyshi) if there is text overflow. Overflow is established using the condition
\ifdim\pagetotal>\pagegoal
% <do something>
\fi
that checks whether the gathered page content (of height \pagetotal) extends beyond the allowed total (of height \pagegoal).
\documentclass{article}
\usepackage{lipsum}% http://ctan.org/pkg/lipsum
\usepackage{everyshi}% http://ctan.org/pkg/everyshi
\usepackage{etoolbox}% http://ctan.org/pkg/etoolbox
\makeatletter
\let\@section@title@\relax% Sectional heading storage
\patchcmd{\@sect}% <cmd>
{\@xsect}% <search>
{\gdef\@section@title@{% Store sectional heading
{\noindent#6\@svsec#8\normalfont\ \smash{(continued)}}\par\bigskip}\@xsect}% <replace>
{}{}% <success><failure>
\EveryShipout{%
\ifdim\pagetotal>\pagegoal% There is content overflow on this page
\aftergroup\@section@title@% Reprint/-insert sectional heading
\fi%
}
\makeatother
\begin{document}
\section{A section}\lipsum[1-6]
\subsection{A subsection}\lipsum[7-14]
\end{document}
The sectional content is captured in \@section@title@ and includes the latest sectional title used (anything from level 1 = \section to level 5 = \paragraph).
Customizations include using only a specific sectional unit (like \section, say). Also, to duplicate the spacing after the sectional header when traditionally used, rather than issuing \bigskip.
The above works in the context of the standard LaTeX document classes (like book, article and report) and may require additional modifications if used in other document classes, or in conjunction with other sectional heading packages.
You can give wrapfigure a bit of a hint that things are not quite the same after a section heading
\section{Section}
\pagedepth\maxdimen
\begin{wrapfigure}[5]{R}{50mm}
seems to work and pushed the section head on to the next page.
Best Answer
There may be a generalisable mechanism: Using e-TeX and its
\clubpenaltiescommand. In the following example, patching\@afterheadingseems to do the trick.UPDATE: egreg has written a detailed explanation of
\widowpenaltiesand\clubpenalties.