我想current grid area根据包中定义的节点定义一个名为 的 tikz 节点。此节点是一个矩形，tikzpagenodes包含包中定义的 4 个节点；current page footer、current page header和：current page text areacurrent page marginpar
网格区域的北边应该是页眉的北边；南边应该是页脚的南边。东边和西边取决于正反面页面。在奇数页中，西边应该是文本区域的西边和页边距的东边。在偶数页中，西边是页边距的西边，东边是文本区域的东边。
我提取每个区域角落的坐标值，并将它们保存在全局宏中，例如\gl@globalgridareaw，\gl@globalgridareae...然后我使用代码构建节点current page。pgfmoduleshapes.code.tex这是我不太理解的部分:-)，
% 特殊当前网格区域边界框矩形：
\expandafter\def\csname pgf@sh@ns@当前网格区域\endcsname{rectangle}
\expandafter\def\csname pgf@sh@np@当前网格区域\endcsname{%
\def\southwest{\pgfqpoint{\gl@globalgridareaw}{\gl@globalgridareas}}%
\def\northeast{\pgfqpoint{\gl@globalgridareae}{\gl@globalgridarean}}%
}
% % TODO：我应该重新定义它吗？
\expandafter\def\csname pgf@sh@nt@当前网格区域\endcsname{{1}{0}{0}{1}{0pt}{0pt}}
\expandafter\def\csname pgf@sh@pi@当前网格区域\endcsname{pgfpageorigin}
}
如下例所示，节点定义不正确。似乎应该添加一些偏移量。
\documentclass{article}
\usepackage{geometry}
\usepackage{tikzpagenodes}
\usetikzlibrary{calc}
\makeatletter
\newcommand{\calculateparameters}{
\noindent\tikz[remember picture,overlay]{\path (current page header area.north);%
\pgfgetlastxy{\gl@discard}{\gl@gridarean}
\path (current page footer area.south);
\pgfgetlastxy{\gl@discard}{\gl@gridareas}
\global\let\gl@globalgridareas\gl@gridareas%
\global\let\gl@globalgridarean\gl@gridarean%
}
\checkoddpage
\ifoddpage
\noindent\tikz[remember picture,overlay]{
\path (current page marginpar area.east);
\pgfgetlastxy{\gl@gridareae}{\gl@discard}
\path (current page text area.west);
\pgfgetlastxy{\gl@gridareaw}{\gl@discard}
\global\let\gl@globalgridareaw\gl@gridareaw%
\global\let\gl@globalgridareae\gl@gridareae%
}
\else
\tikz[remember picture,overlay]{
\path (current page marginpar area.west);
\pgfgetlastxy{\gl@gridareaw}{\gl@discard}
\path (current page text area.east);
\pgfgetlastxy{\gl@gridareae}{\gl@discard}
\global\let\gl@globalgridareaw\gl@gridareaw%
\global\let\gl@globalgridareae\gl@gridareae%
}
\fi
% Special current grid area bounding box rectangle:
\expandafter\def\csname pgf@sh@ns@current grid area\endcsname{rectangle}
\expandafter\def\csname pgf@sh@np@current grid area\endcsname{%
\def\southwest{\pgfqpoint{\gl@globalgridareaw}{\gl@globalgridareas}}%
\def\northeast{\pgfqpoint{\gl@globalgridareae}{\gl@globalgridarean}}%
}
% % TODO: Should I redefine this?
\expandafter\def\csname pgf@sh@nt@current grid area\endcsname{{1}{0}{0}{1}{0pt}{0pt}}
\expandafter\def\csname pgf@sh@pi@current grid area\endcsname{pgfpageorigin}
}
\makeatother
\begin{document}
\calculateparameters%
\noindent\tikz[<-,remember picture,overlay] {%
\draw[red] (current grid area.south west) rectangle (current grid area.north);
}%
\tikz[remember picture,overlay] {%
\draw [blue,line width=2mm]
(current page.south west)
rectangle
(current page.north east);
\draw [green]
(current page text area.south west)
rectangle
(current page text area.north east);
\draw [yellow]
(current page marginpar area.south west)
rectangle
(current page marginpar area.north east);
\draw [red]
(current page header area.south west)
rectangle
(current page header area.north east);
\draw [orange]
(current page footer area.south west)
rectangle
(current page footer area.north east);
}%
\end{document}
答案1
您在那里提取的坐标值（您也可以使用\pgfpointanchor{<node name>}{<anchor>}，然后您将获得尺寸中的坐标\pgf@x，而\pgf@y无需使用 TikZ）是当前 TikZ 图片中的坐标（相对于原点）。
但是在\northeast和\southwest（\savedanchor形状的rectangle）中，需要在节点本身的本地坐标系中使用坐标（在这些情况下，该坐标系是页面的原始坐标系{1}{0}{0}{1}{0pt}{0pt}）。
如果当前 TikZ 图片（您访问节点的位置）与宏（此处）\pgfpictureid中的不一样，则当前 TikZ 图片和节点之间的差异将添加到坐标中（这是文件发挥作用的地方）。\pgf@sh@pi@<node name>pgfpageoriginremember picture.aux
如果你可以在一个 TikZ 图片中提取所有需要的坐标，然后定义节点current grid area并使用
\expandafter\edef\csname pgf@sh@pi@current grid area\endcsname{\pgfpictureid}
（无论如何，变换矩阵都是相同的）。
但你也可以使用这个fit库来做
\node[fit=(current page marginpar area)(current page footer area)(current page header area),
inner sep=+0pt] (current grid area) {};
（仍然需要在每一页上都这样做，以区分偶数和奇数）。
长话短说：
我只需使用来自原始页面节点的坐标值tikzpagenodes。这些包括一些计算，考虑了某些区域的宽度和高度以及这些区域之间的分隔符。
我删除了geometry从您的示例中进行包，因为它对 d 文档中的边距宽度产生了不良影响（至少在没有任何设置的情况下）two side。
代码
\documentclass[two side]{article}
\usepackage{lipsum,tikzpagenodes}
\makeatletter
\@newtikzpagenode{current grid area}{%
\def\southwest{\pgfpoint
{\current@textarea@left\ifoddpageoroneside\else-\marginparsep-\marginparwidth\fi}
{\paperheight-\current@textarea@top-\textheight-\footskip}}%
\def\northeast{\pgfpoint
{\current@textarea@left+\textwidth\ifoddpageoroneside+\marginparsep+\marginparwidth\fi}
{\paperheight-\current@textarea@top+\headsep+\headheight}}%
}
\makeatother
\newcommand*\drawAreas[1][]{%
\tikz[
remember picture, overlay,
nodes={fill=white, fill opacity=.8, text opacity=1, inner ysep=+1pt},
RECT/.style={to path={(\tikztostart.south west) rectangle
node[##1] {\tikztostart} (\tikztostart.north east)}},
#1] {%
\draw [blue,line width=2mm](current page) to[RECT] ();
\draw [green] (current page text area) to[RECT] ();
\draw [yellow!70!black] (current page marginpar area) to[RECT={rotate=90}] ();
\draw [red] (current page header area) to[RECT] ();
\draw [orange] (current page footer area) to[RECT] ();
\draw [black, ultra thick] (current grid area) to[RECT] ();
}}
\begin{document}
\marginpar{\color{gray}\raggedleft\lipsum[2]}
\drawAreas
\vfill\pagebreak
\marginpar{\color{gray}\raggedright\lipsum[2]}
\drawAreas
\end{document}
输出
