两页全景图，无 \afterpage -- 表格和图片

Question 1

我的 MWE：

\documentclass[twoside]{book}%

%\usepackage[symmbound,leftcaption]{doublepagefloats}% <-- This is the package with the new command
\usepackage[symmbound]{doublepagefloats}% <-- This is the package with the new command
%\usepackage{doublepagefloats}% <-- This is the package with the new command

% For demonstration purposes
\usepackage{tikzducks}% Delivers figures for testing purposes
\usepackage{lipsum}% Delivers blind text


% Float placement:
\renewcommand{\textfraction}{0.16} % Smallest text portion on page with floats
\renewcommand{\topfraction}{0.84}  % Biggest portion for a float at page top
\renewcommand{\bottomfraction}{0.84} % Biggest portion for a float at page bottom
\renewcommand{\floatpagefraction}{0.95} %With more than this portion a float may cover a float page

\setcounter{topnumber}{2}% max. 2 floats at the top of a text page
\setcounter{bottomnumber}{2}%  max. 2 floats at the bottom of a text page
\setcounter{totalnumber}{4}% max. 2 floats in total on a text page (are 2 better?)


% For testing purposes on normal pages page numbers both in head and foot
\makeatletter
\def\ps@myheadings{%
    \def\@evenhead{\thepage\hfil\slshape  text for testing purposes}%
    \def\@oddhead{{\slshape text for testing purposes}\hfil\thepage}%
    \let\@mkboth\markboth%
    \let\@oddfoot\@oddhead\let\@evenfoot\@evenhead%
}%
\pagestyle{myheadings}
\makeatother

\begin{document}
    
% Very ugly, but double page tabular
\newcommand\mytabularhuge{%
    \Huge%
    \begin{tabular}{lllll}%
        \textbf{Entry 1} & \textbf{Entry 2} & \textbf{Entry 3} & \textbf{Entry 4} & \textbf{Entry 5} \\%
        \hline%
        Salad & House & Car & Nice garden & Never known before \\%
        hope & Fantasy & This is a very long entry & This is another very long entry & Later I will know \\%
        Don't know, how far still & Big lake & I don't believe in that & Ladies first! & I will never know \\%
    \end{tabular}}%
\newcommand\mytabularlarge{%
    \large%
    \begin{tabular}{lllll}%
        \textbf{Entry 1} & \textbf{Entry 2} & \textbf{Entry 3} & \textbf{Entry 4} & \textbf{Entry 5} \\%
        \hline%
        Salad & House & Car & Nice garden & Never known before \\%
        hope & Fantasy & This is a very long entry & This is another very long entry & Later I will know \\%
        Don't know, how far still & Big lake & I don't believe in that & Ladies first! & I will never know \\%
\end{tabular}}%

    % Wide panorama consisting of 5 ducks:
    \newcommand\panoramawide{\mbox{\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}}}
    \newcommand\panoramanarrow{\mbox{\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}}}

%-------- begin of text -----------

    \listoftables
    \vskip2\baselineskip
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A duck}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A second duck}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A duck}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A second duck}
    \end{figure}
    \doublepagefloat{figure}{b}{l}{\panoramawide}{Test}% height (and keepaspectratio) may help with too high graphics
    \doublepagefloat{figure}{l}{l}{\panoramawide}{Other test}
    \doublepagefloat{figure}{h}{l}{\panoramawide}{Other test}
    \doublepagefloat{figure}{t}{l}{\panoramawide}{A figure, comparable to the table}
    \doublepagefloat{figure}{b}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{l}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{h}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{t}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{b}{p}{\panoramawide}{Other test}
    \doublepagefloat{figure}{l}{p}{\panoramawide}{Other test}
    \doublepagefloat{figure}{h}{p}{\panoramawide}{Still other test with 
        very very very very very very very very very very very
        very very very very very very very very very very very
        very very very very very very very very very very very
        long caption.
    }    
    \doublepagefloat{figure}{t}{p}{\panoramawide}{Test}% height (and keepaspectratio) may help with too high graphics    
\doublepagefloat{table}{h}{l}{\makebox[2\textwidth][c]{\mytabularlarge}}{A Table}

    % Quite some lipsums following to have enpough text for everything
    \lipsum
    \lipsum
    \lipsum
    \lipsum

    % And now we have a second table:
    \doublepagefloat[AAA]{table}{b}{p}{\makebox[2\paperwidth][c]{\mytabularhuge}}{Another Table}

    % Three small floats, but unfortunately only one per page, if you leave the command \restoreplacement commented out
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{Never tired of ducks}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{Never, really~\ldots}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{Last duck}
    \end{figure}
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
\end{document}

经过相当多的测试：对我来说，这至少对我到目前为止使用过的所有方法都有效。它适用于双页浮动和普通浮动（数字和表格）的混合，它也应该（虽然没有测试）适用于新定义的浮动。

这不是我一个人的工作，在过去的两周里，我在 StackExchange 上得到了大量的帮助，没有他们的帮助我不可能做到这一点。

从 Martin Scharrer 的算法开始（见问题），我特别需要两种将浮动推到特定页面的算法，这两种算法均在如何让图形准确出现在第16页？。

其中一种方法是在要推动的浮动元素之前发射相同类型的不可见浮动元素，从而将浮动元素向前推动，直到它到达正确的页面。
另一个方法是在输出之前或之后通过 Hooks 来工作，其中通过图中的标签来控制，计数器 totalnumber 被操作，它控制在一页上打印多少个浮点数：在最后一个其他浮点数之后，totalnumber 被设置为 0，在包含全景图的两页上设置为 1，在全景图之后回到其原始状态。

但在我看来，这两种算法都不是完美的：

隐形浮动算法擅长将浮动推到正确的位置。但可能发生这样的情况：未经请求的后续浮动已经出现在全景图的第二页上。
totalnumber 算法可以很好地避免全景图第二页上出现不想要的浮动。但由于 totalnumber 只能逐页操作，因此我的全景图的一半往往会落在最后一个浮动的页面上。我本可以通过提前将 totalnumber 设置为 1 来避免这种情况——但这样一来，在浮动之前的几页中，每页可能只有一个浮动，我也不喜欢这个想法。

我最终将两种算法结合起来。这变得容易一些，因为我无论如何都需要钩子：对于页脚或页首的全景图，我需要一种方法来擦除页首或页脚的正常部分...

如何使用？
您可以将其与 \doublepagefloat[#1]{#2}{#3}{#4}{#5}{#6} 一起使用，参数如下

#1：辅助标题，用于图片列表
#2：float类型，通常是数字或表格
#3：b：（b）页面底部，t：（t）页面顶部 h：（h）高，即文本顶部，l：（l）低，即文本底部
#4：p：（p）aper，即内容可能最多为2\paperwidth宽，将居中到两页之间的间隙，并可能延伸到纸张边界。但它可能会更窄，然后仍然居中。如果内容的宽度正好是2\textwidth+\gapwidth，它会从左页文本的左边框延伸到右页文本的右边框。l：（l）line，即内容仅使用两页上的线的宽度，两部分之间有较宽的间隙
#5：内容，即图像本身
#6：主标题，图片下方的文字

前面已经提到了新的长度 \gapwidth。这是左页和右页上两个文本块之间的宽度。有两个选项可以调用包，它们可以改变整个文档的行为，都处理标题：

[symmbound]（如果调用）会在无标题页面上留出与标题高度相同的空白 - 因此文本在两个页面上的开始或结束高度相同。如果不调用（默认），标题不需要的空间也会用于文本。
[leftcaption] 默认情况下，标题打印在右侧。如果您希望将其打印在左侧，请调用此选项。

已知问题

这仅适用于单列使用。我从未打算将其用于多列，我从未对其进行过测试。
标题只能跨越一个段落。我尝试过修改这一点，但没有成功。
有时它需要多次编译运行，首先会抱怨死循环。

我在哪里可以获取 doublepagefloats 包？
我会将其发布在另一个答案中，因为它对于这个答案来说太长了。

編輯
我已经编辑过这个答案两次，第一次我完全删除了，第二次我做了很多修改——两次都是因为在此期间我找到了一个更好的解决方案。

Answer

我的 MWE：

\documentclass[twoside]{book}%

%\usepackage[symmbound,leftcaption]{doublepagefloats}% <-- This is the package with the new command
\usepackage[symmbound]{doublepagefloats}% <-- This is the package with the new command
%\usepackage{doublepagefloats}% <-- This is the package with the new command

% For demonstration purposes
\usepackage{tikzducks}% Delivers figures for testing purposes
\usepackage{lipsum}% Delivers blind text


% Float placement:
\renewcommand{\textfraction}{0.16} % Smallest text portion on page with floats
\renewcommand{\topfraction}{0.84}  % Biggest portion for a float at page top
\renewcommand{\bottomfraction}{0.84} % Biggest portion for a float at page bottom
\renewcommand{\floatpagefraction}{0.95} %With more than this portion a float may cover a float page

\setcounter{topnumber}{2}% max. 2 floats at the top of a text page
\setcounter{bottomnumber}{2}%  max. 2 floats at the bottom of a text page
\setcounter{totalnumber}{4}% max. 2 floats in total on a text page (are 2 better?)


% For testing purposes on normal pages page numbers both in head and foot
\makeatletter
\def\ps@myheadings{%
    \def\@evenhead{\thepage\hfil\slshape  text for testing purposes}%
    \def\@oddhead{{\slshape text for testing purposes}\hfil\thepage}%
    \let\@mkboth\markboth%
    \let\@oddfoot\@oddhead\let\@evenfoot\@evenhead%
}%
\pagestyle{myheadings}
\makeatother

\begin{document}
    
% Very ugly, but double page tabular
\newcommand\mytabularhuge{%
    \Huge%
    \begin{tabular}{lllll}%
        \textbf{Entry 1} & \textbf{Entry 2} & \textbf{Entry 3} & \textbf{Entry 4} & \textbf{Entry 5} \\%
        \hline%
        Salad & House & Car & Nice garden & Never known before \\%
        hope & Fantasy & This is a very long entry & This is another very long entry & Later I will know \\%
        Don't know, how far still & Big lake & I don't believe in that & Ladies first! & I will never know \\%
    \end{tabular}}%
\newcommand\mytabularlarge{%
    \large%
    \begin{tabular}{lllll}%
        \textbf{Entry 1} & \textbf{Entry 2} & \textbf{Entry 3} & \textbf{Entry 4} & \textbf{Entry 5} \\%
        \hline%
        Salad & House & Car & Nice garden & Never known before \\%
        hope & Fantasy & This is a very long entry & This is another very long entry & Later I will know \\%
        Don't know, how far still & Big lake & I don't believe in that & Ladies first! & I will never know \\%
\end{tabular}}%

    % Wide panorama consisting of 5 ducks:
    \newcommand\panoramawide{\mbox{\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}\includegraphics[width=.4\panowidth]{example-image-duck}}}
    \newcommand\panoramanarrow{\mbox{\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}\includegraphics[width=.2\panowidth]{example-image-duck}}}

%-------- begin of text -----------

    \listoftables
    \vskip2\baselineskip
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A duck}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A second duck}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A duck}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{A second duck}
    \end{figure}
    \doublepagefloat{figure}{b}{l}{\panoramawide}{Test}% height (and keepaspectratio) may help with too high graphics
    \doublepagefloat{figure}{l}{l}{\panoramawide}{Other test}
    \doublepagefloat{figure}{h}{l}{\panoramawide}{Other test}
    \doublepagefloat{figure}{t}{l}{\panoramawide}{A figure, comparable to the table}
    \doublepagefloat{figure}{b}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{l}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{h}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{t}{p}{\includegraphics[width=\dimexpr2\textwidth+\gapwidth\relax, height=0.3\textheight]{example-image-duck}}{Still another test}
    \doublepagefloat{figure}{b}{p}{\panoramawide}{Other test}
    \doublepagefloat{figure}{l}{p}{\panoramawide}{Other test}
    \doublepagefloat{figure}{h}{p}{\panoramawide}{Still other test with 
        very very very very very very very very very very very
        very very very very very very very very very very very
        very very very very very very very very very very very
        long caption.
    }    
    \doublepagefloat{figure}{t}{p}{\panoramawide}{Test}% height (and keepaspectratio) may help with too high graphics    
\doublepagefloat{table}{h}{l}{\makebox[2\textwidth][c]{\mytabularlarge}}{A Table}

    % Quite some lipsums following to have enpough text for everything
    \lipsum
    \lipsum
    \lipsum
    \lipsum

    % And now we have a second table:
    \doublepagefloat[AAA]{table}{b}{p}{\makebox[2\paperwidth][c]{\mytabularhuge}}{Another Table}

    % Three small floats, but unfortunately only one per page, if you leave the command \restoreplacement commented out
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{Never tired of ducks}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{Never, really~\ldots}
    \end{figure}
    \begin{figure}
        \centering
        \includegraphics[width=0.5\textwidth]{example-image-duck}
        \caption{Last duck}
    \end{figure}
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
    \lipsum
\end{document}