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如何在 eso-pic 中测试页面样式

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如何在 eso-pic 中测试页面样式

我在 eso-pic 中实现此解决方案时遇到了麻烦：如果pagestyle等于...——我该如何询问呢？看起来\thepagestyle每个页面都显得“花哨”，包括明显“朴素”的页面。

\documentclass[12pt,twoside]{book}
\usepackage[paperwidth=4in,paperheight=2in,left=0.5in,top=0.25in,%
  right=0.25in,bottom=0.25in]{geometry}
\usepackage{fancyhdr}
\usepackage{etoolbox}
\usepackage{eso-pic}
\makeatletter
\pretocmd{\pagestyle}{%
  \gdef\@regularpagestyle{#1}%
  \gdef\thepagestyle{\if@specialpage\@specialstyle\else\@regularpagestyle\fi}
  }
{\message{(patching of \string\pagestyle\ succeeded)}}
{\message{(patching of \string\pagestyle\ failed)}}
\makeatother
\pagestyle{fancy}
\begin{document}
\AddToShipoutPicture{%
    \fontsize{24.88pt}{24.88pt}\selectfont%
    \ifdef{\thepagestyle}{%
      The page style is `\thepagestyle'.%
    }{%
      There is no page style declared.%
}}
\thispagestyle{plain}
\ifdef{\thepagestyle}{
  The page style is `\thepagestyle'.%
}{%
  There is no page style declared.
}
\end{document}

平均能量损失

我的目标是为每种页面样式设置不同的背景图像。我可以任何一个设置持续默认值（使用\AddToShipoutPicture），或者单个页面（使用\AddToShipoutPicture*），但不能同时进行。

同时使用它们会产生可怕的结果。清除单个页面的默认值后就无法再次设置默认值，除非我知道确切的页面边界。

我认为，这里的解决方案将是一个糟糕的借口：如何清除当前页面的背景？这会导致文件体积过大和内部数据质量低下。

现在我试图将所有逻辑放在一个调用中\AddToShipoutPicture（在我的自定义命令中\PageDecor）：

\documentclass[10pt,twoside]{book}
\usepackage[paperwidth=6in,paperheight=9in,left=1in,top=1in,right=0.75in,bottom=1in]{geometry}
\usepackage{fancyhdr}
\renewcommand{\headrulewidth}{0pt}
\usepackage{graphicx}
\usepackage{etoolbox}
\usepackage{ifthen}


\makeatletter
\pretocmd{\pagestyle}{
  \gdef\@regularpagestyle{#1}
  \gdef\thepagestyle{\if@specialpage\@specialstyle\else\@regularpagestyle\fi}
  }
{\message{(patching of \string\pagestyle\ succeeded)}}
{\message{(patching of \string\pagestyle\ failed)}}
\makeatother


\usepackage{eso-pic}
\newcommand{\PageDecor}{\AddToShipoutPicture{%
    \ifodd\value{page}%
        \ifthenelse{\equal{\thepagestyle}{fancy}}{%
            \includegraphics[width=6in]{decor-6x9-right-fancy.pdf}%
        }{%
            \includegraphics[width=6in]{decor-6x9-right-plain.pdf}%
        }%
    \else%
        \ifthenelse{\equal{\thepagestyle}{fancy}}{%
            \includegraphics[width=6in]{decor-6x9-left-fancy.pdf}%
        }{%
            \includegraphics[width=6in]{decor-6x9-left-plain.pdf}%
        }%
    \fi%
}}
\newcommand{\PageDecorFancyOnce}{\AddToShipoutPicture*{%
    \ifodd\value{page}%
        \includegraphics[width=6in]{decor-6x9-right-fancy.pdf}%
    \else%
        \includegraphics[width=6in]{decor-6x9-left-fancy.pdf}%
    \fi%
}}
\newcommand{\PageDecorPlainOnce}{\AddToShipoutPicture*{%
    \ifodd\value{page}%
        \includegraphics[width=6in]{decor-6x9-right-plain.pdf}%
    \else%
        \includegraphics[width=6in]{decor-6x9-left-plain.pdf}%
    \fi%
}}
\begin{document}

\pagestyle{fancy}
\pagenumbering{arabic}
\setcounter{page}{1}
\fancypagestyle{plain}{\fancyhf{} \cfoot[\thepage]{\thepage}}
\fancyhf{}
\lhead[{\makebox[0.25in][l]{\hfill\thepage\hfill}}]{}
\rhead[]{{\makebox[0.25in][r]{\hfill\thepage\hfill}}}
\PageDecor

\thispagestyle{plain}
Testing testing 0123456789
\clearpage
\thispagestyle{plain}
Testing testing 0123456789
\clearpage
Testing testing 0123456789
\clearpage
Testing testing 0123456789

\end{document}

实际结果

我可以在这里模拟我想要的输出，因为我知道每个页面的边界：

%\PageDecor

\thispagestyle{plain}
\PageDecorPlainOnce
Testing testing 0123456789
\clearpage
\thispagestyle{plain}
\PageDecorPlainOnce
Testing testing 0123456789
\clearpage
\PageDecorFancyOnce
Testing testing 0123456789
\clearpage
\PageDecorFancyOnce
Testing testing 0123456789

期望结果

恐怕我对 Matthew Leingang 的修改还不够了解，无法自己解决。我搜索了这些符号的定义\if@specialpage等，但无济于事。对我来说，它仍然是一个黑匣子。

任何帮助或见解都将不胜感激。

答案1

以下提供页面样式特定背景的接口：

在此处输入图片描述

\documentclass[twoside]{book}

\usepackage{fancyhdr,graphicx,afterpage,eso-pic}
\renewcommand{\headrulewidth}{0pt}

\let\oldpagestyle\pagestyle
\let\oldthispagestyle\thispagestyle
\renewcommand{\pagestyle}[1]{% Update \pagestyle{<style>}...
  \gdef\thepagestyle{#1}% ...to store <style> in \thepagestyle
  \oldpagestyle{#1}}
\renewcommand{\thispagestyle}[1]{% Update \thispagestyle{<style>}...
  \xdef\savepagestyle{\thepagestyle}% ...to store <style> in \thepagestyle ...
  \gdef\thepagestyle{#1}%
  \afterpage{\xdef\thepagestyle{\savepagestyle}}% ...and revert to original <style> after this page
  \oldthispagestyle{#1}}

\newcommand{\PageDecor}{\AddToShipoutPicture{%
  \ifodd\value{page} % Odd page
    \ifnum\pdfstrcmp{\thepagestyle}{fancy} = 0 % Page style is fancy
      \AtPageCenter{\makebox[0pt]{\raisebox{-.5\height}{\scalebox{10}{FO}}}}
    \else% \thepagestyle = \pagestyleplain (or another page style)
      \AtPageCenter{\makebox[0pt]{\raisebox{-.5\height}{\scalebox{10}{PO}}}}
    \fi
  \else% Even page
    \ifnum\pdfstrcmp{\thepagestyle}{fancy} = 0 % Page style is fancy
      \AtPageCenter{\makebox[0pt]{\raisebox{-.5\height}{\scalebox{10}{FE}}}}
    \else% \thepagestyle = \pagestyleplain (or another page style)
      \AtPageCenter{\makebox[0pt]{\raisebox{-.5\height}{\scalebox{10}{PE}}}}
    \fi
  \fi
}}

\fancyhf{}% Clear header/footer
\lhead[\thepage]{}% Odd left header
\rhead[]{\thepage}% Even right header
\fancypagestyle{plain}{%
  \fancyhf{}% Clear header/footer
  \cfoot[\thepage]{\thepage}% Center footer (odd & even)
  \gdef\thepagestyle{plain}}

\begin{document}

\pagestyle{fancy}

\PageDecor

\thispagestyle{plain}
Page 1 (plain page style)
\clearpage
Page 2 (fancy page style)
\clearpage
Page 3 (fancy page style)
\clearpage
\thispagestyle{plain}
Page 4 (plain page style)

\end{document}

我们更新\pagestyle并\thispagestyle存储当前页面样式，\thepagestyle并\AddToShipoutPicture使用 eTeX在内部进行相应的条件调整\pdfstrcmp{<strA>}{<strB>}，如果<strA>=则返回 0 <strB>。

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