如何生成“分页符后是否继续”标题？

Question

这是对以下问题的回答的后续问题分页后重新显示章节标题

与后续问题一样，我想在分页符后重复章节标题，但仅限于分页符与章节结尾不对应的情况。

我尝试了 Werner 的答案中提出的代码，但是当延伸到下一页的长部分应该从页面末尾开始但 LaTeX 将其完全移动到下一页时，它的性能并不好，例如因为在部分开始后立即插入了一个长表格，如下面的代码所示：

\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[1-4]

  \section{Second section}
  \begin{tabular}{l}
    AAAAAAAAAAAAAAAAAAAA \\
    AAAAAAAAAAAAAAAAAAAA \\
    AAAAAAAAAAAAAAAAAAAA \\
    AAAAAAAAAAAAAAAAAAAA \\
    AAAAAAAAAAAAAAAAAAAA \\
    AAAAAAAAAAAAAAAAAAAA \\
    AAAAAAAAAAAAAAAAAAAA \\
  \end{tabular}
  \par\lipsum[7-14]
  \end{document}

在这种情况下，第二页在正常标题“2 第二节”之前错误地插入了“2 第二节（续）”：

Answer 1

以下解决方案基本上修补了tabular环境以测量表格的高度，并在实际黑客攻击中执行更多测试以避免错误行为。我在代码中留下了有关单个步骤的更多细节，就像@Werner 的原始解决方案一样。

代码

\documentclass{article}
\usepackage{lipsum}% http://ctan.org/pkg/lipsum
\usepackage{everyshi}% http://ctan.org/pkg/everyshi
\usepackage{etoolbox}% http://ctan.org/pkg/etoolbox
\usepackage{environ}% http://www.ctan.org/pkg/environ

\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>
\newif\if@sectionpage %Conditional to see if we are on the page where a section has been started
\newif\if@tab@pagebreak %Conditional to check if a table will cause a pagebreak
\newdimen\currtabheight
\newdimen\pt@saved
  \let\ltx@tabular\tabular
  \let\ltx@endtabular\endtabular
  \providecommand{\env@tabular@save@env}{}
  \providecommand{\env@tabular@process}{}
%Patching the tabular envionment
\RenewEnviron{tabular}[1]{%
  \setbox0=\hbox{% box the tabular to measure the height later
    \ltx@tabular{#1}
      \BODY
    \ltx@endtabular
    }
  \currtabheight=\ht0 \advance\currtabheight by \dp0%
  \pt@saved=\the\pagetotal% store the current pagetotal value
  \advance\pt@saved by \currtabheight% add the height of the current tabular
  \ifdim\pt@saved>\pagegoal% the tabular will cause a pagebreak
    \global\@tab@pagebreaktrue
  \fi
  \ltx@tabular{#1}% printing the tabular
    \BODY
  \ltx@endtabular
  }
%Doing the old shipout trick with the addtional declared conditionals
\EveryShipout{%
  \ifdim\pagetotal>\pagegoal
    \if@sectionpage
      \if@tab@pagebreak\else\aftergroup\@section@title@\fi
    \else
      \aftergroup\@section@title@
    \fi
  \fi
  \global\@sectionpagefalse
  \global\@tab@pagebreakfalse}
%redefinition to make the sectionpage-switch work
\let\ltx@section=\section
\renewcommand{\section}{\@sectionpagetrue\ltx@section}
\makeatother

\begin{document}
\section{A section}\lipsum[1-4]
\section{Second section}

\begin{tabular}{l}
  AAAAAAAAAAAAAAAAAAAA \\
  AAAAAAAAAAAAAAAAAAAA \\
  AAAAAAAAAAAAAAAAAAAA \\
  AAAAAAAAAAAAAAAAAAAA \\
  AAAAAAAAAAAAAAAAAAAA \\
  AAAAAAAAAAAAAAAAAAAA
\end{tabular}

\lipsum[7-14]
\end{document}

输出

评论

如果您使用除表格之外的其他不可破坏材料，则可能会再次出现错误。这些宏必须像环境一样进行修补tabular。如果是这种情况，也许只需发表评论即可。