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程式碼

新頁面有一些奇怪的行為（感謝大衛卡萊爾指出這不僅僅是\clearpage）\hypersetup這會破壞文檔後面的能力。

我在新頁面後產生元數據，因此我需要以某種方式儲存這些數據以供下次運行。

詳細資訊請參考下面的演示。

程式碼

\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輸出（已註\clearpage）

預期輸出。

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輸出（未註記\clearpage）

意外的輸出。

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

您可以透過多種方式簡化您的設定。

\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這是我第一次運行後得到的結果

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

這是我第二次運行後得到的結果：

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 檔案解決方案

這可能會被簡化，並且可能存在弱點。我剛開始嘗試寫入/讀取 AUX 檔案。

值得注意的是，某些事情必須在文件的早期設定：

\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. 這會將元資料寫入 aux 文件，如下所示：

例如

\mysetproducer{Tester Schmoe}
  1. 下次運行會立即解析 aux\begin{document}並執行：

例如

 \mysetproducer{Tester Schmoe}

這又創建了一個my@pdfproducer包含以下內容的命令Tester Schmoe

例如

 \expandafter\xdef\csname my@pdfproducer\endcsname{#1}}
  1. 如果巨集存在，使用者層級指令\myproducer會取得該值（僅在建立 aux 檔案之後－也就是至少運行一次之後）

例如

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

完整程式碼

\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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