如何跨列同步分页文本？

Question

总结：类似于脚注，但在侧面（容易的部分）。这些笔记必须与其参考点位于同一页面上，因此每当笔记中断时“正文”也需要中断。

我正在尝试制作类似这样的东西：

我一直在使用memoir。这是我的一个想法。我的理解是\footnote创建一个浮动，它会尝试将自己放置在最近页面的底部。是否可以将“脚注锚点”放置在其他地方？例如，使用一些有趣的页面几何图形，如下所示：

困难的部分在于问题标题：确保分页符尊重列与列的对齐。

这是一个 MWE。

\documentclass{memoir}

% geometry stuff here

\begin{document}
Blind Text

Lorem ipsum dolor sit amet. \columnnote{This is the first ``footnote.''}

The quick brown fox jumped over the lazy dog. \columnnote{This is the second ``footnote.''}
\end{document}

Answer 1

这将使用整个右列从上到下书写注释。分页是使用辅助文件和完成的\everypar。

不用说，这种方法会与任何使用\everypar（在paracol环境内）的包相冲突。

\documentclass{memoir}
\usepackage{xcolor}
\usepackage{paracol}
\usepackage{lipsum}

\newcommand{\darkmark}[1]% #1 = text to write white on black background
{\rlap{\rule[-.2\baselineskip]{\bibindent}{\baselineskip}}%
 \makebox[\bibindent]{\color{white}#1}}

% global registers

\newcounter{abortparagraph}% incremet for every aborted paragraph
\newcounter{columnnote}[chapter]
\globalcounter{columnnote}% synchronized across columns
\newlength{\columnheight}% space used for column notes
\newlength{\columnroom}% available space for column notes
\newif\ifparagraphaborted% ignore extra everypar after abort
\newcommand{\leftcolumnpage}{}% reserve global names
\newcommand{\rightcolumnpage}{}% for page synchronization

% move current paragraph to next page

\newcommand{\newabortparagraph}[1]% #1 = \theparagraph, #2 = \thepage
{\stepcounter{abortparagraph}%
 \global\expandafter\def\csname abortparagraph\arabic{abortparagraph}\endcsname{#1}}

\makeatletter
\newcommand{\abortparagraph}% \everypar
{\ifparagraphaborted% ignore extra everypar after abort
  \global\paragraphabortedfalse
\else
  \global\edef\leftcolumnpage{\arabic{page}}%
  \stepcounter{paragraph}%
  \bgroup% in case \tempa and \tempb previously used
    \@ifundefined{abortparagraph\arabic{abortparagraph}}{}%
    {\edef\tempa{\csname abortparagraph\arabic{abortparagraph}\endcsname}%
     \edef\tempb{\theparagraph}%
     \ifx\tempa\tempb% compare strings
       \strut\newpage
       \stepcounter{abortparagraph}%
       \global\paragraphabortedtrue
     \fi}%
  \egroup
\fi}

% synchronize pages

\newcommand{\columnnotepage}[2]% #1 = label, #2 = \thepage
{\global\expandafter\def\csname columnnotepage#1\endcsname{#2}}

% redefine paracol environment start

\let\oldparacol=\paracol

\renewcommand{\paracol}[1]{\oldparacol{#1}%
  \everypar{\abortparagraph}%
  \setlength{\columnheight}{0pt}%
  \setlength{\columnroom}{\@colroom}%
  \global\edef\leftcolumnpage{\arabic{page}}%
  \global\edef\rightcolumnpage{\arabic{page}}%
}

% write notes in right column

\newcommand{\columnnote}[1]% #1 = text for second column
{\refstepcounter{columnnote}%
 \darkmark{\thecolumnnote}%
 \@ifundefined{columnnotepage\thechapter.\thecolumnnote}{}%
   {\def\leftcolumnpage{\csname columnnotepage\thechapter.\thecolumnnote\endcsname}}%
 \ifnum\rightcolumnpage<\leftcolumnpage\relax% synchronize pages
   \global\columnroom=\textheight
   \global\columnheight=0pt
   \switchcolumn[1]%
     \loop\ifnum\c@page<\leftcolumnpage \strut\newpage\repeat
     \global\edef\rightcolumnpage{\arabic{page}}%
   \switchcolumn[0]%
 \fi
 \bgroup% compute size of note
   \setbox0=\hbox{\begin{minipage}{\dimexpr \columnwidth-\bibindent}#1\end{minipage}}%
   \global\advance\columnheight by \dimexpr \baselineskip + \ht0 + \dp0\relax
 \egroup
 \ifdim\columnheight>\columnroom\relax% time to break page
   \immediate\write\@auxout{\string\newabortparagraph {\theparagraph}}%
   \switchcolumn[1]%
     \strut\newpage%
     \global\edef\rightcolumnpage{\arabic{page}}
   \switchcolumn[0]%
   \global\columnroom=\textheight
   \bgroup% re-compute size of note
     \setbox0=\hbox{\begin{minipage}{\dimexpr \columnwidth-\bibindent}#1\end{minipage}}%
     \global\columnheight=\dimexpr \baselineskip + \ht0 + \dp0\relax
   \egroup
 \else
   \immediate\write\@auxout{\string\columnnotepage {\thechapter.\thecolumnnote}{\thepage}}%
 \fi
 \switchcolumn[1]%
   \noindent\hspace{\bibindent}%
   \begin{minipage}{\dimexpr \columnwidth-\bibindent}%
     \mbox{\llap{\darkmark{\thecolumnnote}}%
       \color{lightgray}\rule[-0.2\baselineskip]{\textwidth}{\baselineskip}}%
     \linebreak#1\end{minipage}%
   \linebreak\vspace{\marginparpush}%
 \switchcolumn[0]%
 \global\advance\columnheight by \marginparpush%
}
\makeatother

\begin{document}
\setcounter{abortparagraph}{1}% reuse counter after aux file read
\chapter{One}
\begin{paracol}{2}
Blind text.

Lorem ipsum dolor sit amet. \columnnote{This is the first ``footnote.''}

The quick brown fox jumped over the lazy dog. \columnnote{This is the second ``footnote.''}

Too big for the page.  \columnnote{\rule{1pt}{.9\textheight}}

Next paragraph.
\end{paracol}
\end{document}

应该注意的是，它\switchcolumn也不会同步页面。这必须单独完成。请注意，\thepage当段落分为两页时，它是不可靠的，因此它们会保存到辅助文件中。此外，必须小心不要同步中止的段落，因为它们每次都必须无法通过测试。