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代码

新页面出现一些奇怪的行为（感谢 David Carlisle 指出这不仅仅是\clearpage）\hypersetup这会破坏后续文档的能力。

我在新页面之后生成元数据，因此我需要以某种方式存储这些数据以供下次运行。

详情请见下面的演示。

代码

\documentclass{article}
\usepackage{fontspec} % typeset with xelatex
\usepackage{hyperref}

\newcommand\insertproducer{placeholder}
\hypersetup{pdfproducer=Tester Schmoe (set in preamble)}

\AtEndDocument{%
  \renewcommand\insertproducer{Tester Schmidt (set in body just before end)}
  \hypersetup{pdfproducer=\insertproducer}
}%

\begin{document}
\null
%\clearpage % <-- uncommenting this results in \hypersetup failure
\end{document}

pdfinfo test.pdf输出（注释\clearpage）

预期输出。

Creator:        LaTeX with hyperref package
Producer:       Tester Schmidt (set in body just before end)
CreationDate:   Tue Jun  7 12:13:48 2016
Tagged:         no
Pages:          1
Encrypted:      no
Page size:      612 x 792 pts (letter)
File size:      2149 bytes
Optimized:      no
PDF version:    1.5

pdfinfo test.pdf输出（未注释\clearpage）

意外的输出。

Creator:        LaTeX with hyperref package
Producer:       Tester Schmoe (set in preamble)
CreationDate:   Tue Jun  7 12:16:44 2016
Tagged:         no
Pages:          1
Encrypted:      no
Page size:      612 x 792 pts (letter)
File size:      2138 bytes
Optimized:      no
PDF version:    1.5

答案1

您可以通过多种方式简化您的设置。

\documentclass{article}

\usepackage{hyperref}

\hypersetup{pdfproducer=Tester Schmitty (set in preamble)}

\AtBeginDocument{%
  \hypersetup{
    pdfproducer = \myproducer,
  }
}

\makeatletter
\newcommand*\myhypersetuptoaux[1]{% command to tell LaTeX to save the value for the next run
  \AtEndDocument{%
    \immediate\write\@auxout{\string\my@producer{#1}}%
  }%
}
\newcommand*{\my@producer}[1]{\protected@xdef\myproducer{#1}}
\newcommand*{\myproducer}{% initial value
  This baby needs extra TLC, run it again.%
}
\makeatother

\begin{document}
\null
\clearpage
\myhypersetuptoaux{Tester Schmoe}
\end{document}

pdfinfo这是我第一次跑步后得到的

Title:          
Subject:        
Keywords:       
Author:         
Creator:        LaTeX with hyperref package
Producer:       This baby needs extra TLC, run it again.
CreationDate:   Thu Jun  9 09:17:16 2016
ModDate:        Thu Jun  9 09:17:16 2016
Tagged:         no
Form:           none
Pages:          1
Encrypted:      no
Page size:      612 x 792 pts (letter) (rotated 0 degrees)
File size:      8416 bytes
Optimized:      no
PDF version:    1.5

这是我第二次运行后得到的结果：

Title:          
Subject:        
Keywords:       
Author:         
Creator:        LaTeX with hyperref package
Producer:       Tester Schmoe
CreationDate:   Thu Jun  9 09:20:39 2016
ModDate:        Thu Jun  9 09:20:39 2016
Tagged:         no
Form:           none
Pages:          1
Encrypted:      no
Page size:      612 x 792 pts (letter) (rotated 0 degrees)
File size:      8389 bytes
Optimized:      no
PDF version:    1.5

答案2

AUX 文件解决方案

这可能会被简化，也可能存在缺点。我刚刚开始尝试写入/读取 AUX 文件。

需要特别注意的是，必须在文档早期设置某些事项：

\hypersetup{
    colorlinks=true,
    linkcolor=red,
    urlcolor=red,
    hyperfootnotes=false,
    hypertexnames,
    bookmarks=true % Causes clash if hyperref parameters loaded before bookmark, because bookmark loads hyperref without any parameters
}
  1. 这会将元数据写入辅助文件，如下所示：

例如

\mysetproducer{Tester Schmoe}
  1. 下一次运行将立即解析 aux\begin{document}并执行：

例如

 \mysetproducer{Tester Schmoe}

这反过来又创建了一个my@pdfproducer包含Tester Schmoe

例如

 \expandafter\xdef\csname my@pdfproducer\endcsname{#1}}
  1. 如果宏存在，用户级命令\myproducer将获取该值（仅在创建辅助文件后 - 即至少运行一次后）

例如

\expandafter\ifx\csname my@pdfproducer\endcsname\relax This baby needs extra TLC, run it again.\else
\csname my@pdfproducer\endcsname\fi}

完整代码

\documentclass{article}
\usepackage{fontspec} % typeset with xelatex
\usepackage{hyperref}
\usepackage{atveryend}

\hypersetup{pdfproducer=Tester Schmitty (set in preamble)}

\AtBeginDocument{%
  \hypersetup{
    pdfproducer = \myproducer{}
  }
}

\makeatletter
\newcommand*\myhypersetuptoaux[1]{% command to tell LaTeX to save the value for the next run
  %\AfterLastShipout{%
    \immediate\write\@auxout{%
    %\protected@write\@mainaux{}{%
      \string\mysetproducer{#1}%
    %}%
    }%
  %}%
}
\makeatother

\makeatletter
\newcommand*{\mysetproducer}[1]{% called by the aux file and creates command my@producer that expands to input of myhypersetuptoaux
  \expandafter\xdef\csname my@pdfproducer\endcsname{#1}}
\makeatother

\makeatletter
\newcommand*{\myproducer}{% user-level command to retrieve value of my@pdfproducer
  \expandafter\ifx\csname my@pdfproducer\endcsname\relax This baby needs extra TLC, run it again.\else
  \csname my@pdfproducer\endcsname\fi}
%  \@ifundefined{stored@#1}{???}{\csname stored@#1\endcsname}%
\makeatother

\begin{document}
\null
\clearpage
\myhypersetuptoaux{Tester Schmoe}
\end{document}

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