我正在尝试修改\label
命令,以便除了页面和之外,还将章节存储在 .aux 文件中\@currentlabel
。我尝试了以下步骤,但没有效果。
\documentclass{book}
\usepackage{amsthm}
\makeatletter
\def\@newl@bel#1#2#3{%
\@ifundefined{#1@#2}%
\relax
{\gdef \@multiplelabels {%
\@latex@warning@no@line{There were multiply-defined labels}}%
\@latex@warning@no@line{Label `#2' multiply defined}}%
\global\@namedef{#1@#2}{#3}}
\def\newlabel{\@newl@bel r}
\@onlypreamble\@newl@bel
\let \@multiplelabels \relax
\def\label#1{\@bsphack
\protected@write\@auxout{}%
{\string\newlabel{#1}{{\@currentlabel}{\thepage}{\thechapter}}}%
\@esphack}
\def\refstepcounter#1{\stepcounter{#1}%
\protected@edef\@currentlabel
{\csname p@#1\endcsname\csname the#1\endcsname}%
}
\def\ref#1{\expandafter\@setref\csname r@#1\endcsname\@firstofthree{#1}}
\def\pageref#1{\expandafter\@setref\csname r@#1\endcsname\@secondofthree{#1}}
\def\chapref#1{\expandafter\@setref\csname r@#1\endcsname\@thirdofthree{#1}}
\makeatother
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\begin{document}
\setcounter{page}{3}
\setcounter{chapter}{1}
\chapter{abc}
\begin{theorem}\label{theo}abc\end{theorem}
Theorem \ref{theo} in chapter \chapref{theo}, page \pageref{theo} says that abc.
\end{document}
\chapref
即使无法识别,新命令仍可正常工作,而\ref
,和\pageref
返回\@currentlabel
\thepage
和 的连接thechapter
。
我不太明白这些变量代表什么,\@newl@bel
这让我很难看出我做错了什么。
正如我在评论中提到的,我对不需要任何参考包的解决方案感兴趣。我知道这个问题,但我想知道是否可以通过修改 \newlabel 来实现。
答案1
这很容易,zref
并定义一个新chapterprop
属性,然后存储\thechapter
。
然而要付出的代价\zref
是\zlabel
\zpageref
\documentclass{book}
\usepackage{amsthm}
\usepackage[user]{zref}
\makeatletter
\zref@newprop{chapterprop}{\thechapter}
\zref@addprops{main}{chapterprop}
\newcommand{\chapref}[1]{\zref@extract{#1}{chapterprop}}%\expandafter\@setref\csname r@#1\endcsname\@thirdofthree{#1}}
\makeatother
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\begin{document}
\setcounter{page}{3}
\setcounter{chapter}{1}
\chapter{abc}
\begin{theorem}\zlabel{theo}abc\end{theorem}
Theorem \zref{theo} in chapter \chapref{theo}, page \zpageref{theo} says that abc.
\end{document}
更新无需任何*ref
相关包,只需提供命令即可进行黑客\label
攻击。\ref
\pageref
\@...ofthree
\documentclass{book}
\usepackage{amsthm}
\makeatletter
\def\label#1{\@bsphack
\protected@write\@auxout{}%
{\string\newlabel{#1}{{\@currentlabel}{\thepage}{\thechapter}}}%
\@esphack}
\long\def\@firstofthree#1#2#3{#1}
\long\def\@secondofthree#1#2#3{#2}
%\long\def\@threeofthree#1#2#3{#3}% Is defined in `latex.ltx` already
\def\ref#1{\expandafter\@setref\csname r@#1\endcsname\@firstofthree{#1}}
\def\pageref#1{\expandafter\@setref\csname r@#1\endcsname
\@secondofthree{#1}}
\def\chapref#1{\expandafter\@setref\csname r@#1\endcsname
\@thirdofthree{#1}}
\makeatother
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\begin{document}
\setcounter{page}{3}
\setcounter{chapter}{1}
\chapter{abc}
\begin{theorem}\label{theo}abc\end{theorem}
Theorem \ref{theo} in chapter \chapref{theo}, page \pageref{theo} says that abc.
\end{document}
答案2
在注释掉一些不必要的内容并添加\@firstofthree
和的定义后,您的代码似乎可以工作了\@secondofthree
。(\@thirdoftree
已定义。)
你的代码确实破坏了超链接-package,因此只有在超链接-package 未加载。
\documentclass{book}
\usepackage{amsthm}
\makeatletter
\renewcommand*\@newl@bel[3]{%
\@ifundefined{#1@#2}%
\relax
{%
\gdef\@multiplelabels{%
\@latex@warning@no@line{There were multiply-defined labels}%
}%
\@latex@warning@no@line{Label `#2' multiply defined}%
}%
\global\@namedef{#1@#2}{#3}%
}%
%\@onlypreamble\@newl@bel
%\let\@multiplelabels\relax
\renewcommand*\label[1]{%
\@bsphack
\protected@write\@auxout
{}%
{\string\newlabel{#1}{{\@currentlabel}{\thepage}{\thechapter}}}%
\@esphack
}%
%\def\refstepcounter#1{%
% \stepcounter{#1}%
% \protected@edef\@currentlabel
% {\csname p@#1\endcsname\csname the#1\endcsname}%
%}%
\renewcommand*\ref[1]{%
\expandafter\@setref\csname r@#1\endcsname\@firstofthree{#1}%
}%
\renewcommand*\pageref[1]{%
\expandafter\@setref\csname r@#1\endcsname\@secondofthree{#1}%
}%
\newcommand*\chapref[1]{%
\expandafter\@setref\csname r@#1\endcsname\@thirdofthree{#1}%
}
\newcommand\@firstofthree[3]{#1}%
\newcommand\@secondofthree[3]{#2}%
%\newcommand\@thirdofthree[3]{#3}%
\makeatother
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\begin{document}
\setcounter{page}{3}
\setcounter{chapter}{1}
\chapter{abc}
\begin{theorem}\label{theo}abc\end{theorem}
Theorem \ref{theo} in chapter \chapref{theo}, page \pageref{theo} says that abc.
\end{document}
如果你真的不想使用参考值-package 我可以提供另一个粗略的 hack,它似乎不会破坏超链接-包裹:
重新定义/修补\label
-command,以便让\label
-command 修补\@currentlabel
-macro,使其\@currentlabel
扩展为两个参数,前面有一个健壮的命令来选择两个参数之一,第一个参数保存\@currentlabel
修补前的内容,第二个参数保存\thechapter
:
\documentclass{book}
\usepackage{amsthm}
%%\usepackage{hyperref}
\makeatletter
\DeclareRobustCommand\My@GetRefArg[2]{#1}%
\DeclareRobustCommand\MyOther@GetRefArg[2]{#2}%
\newcommand\My@saved@currentlabel{}%
\AtBeginDocument{%
\let\My@oldlabel=\label
\renewcommand\label[1]{%
\@bsphack
\let\My@saved@currentlabel=\@currentlabel
\expandafter\def
\expandafter\@currentlabel
\expandafter{%
\expandafter\My@GetRefArg
\expandafter{%
\@currentlabel}{\thechapter}}%
\@esphack
\My@oldlabel{#1}%
\@bsphack
\let\@currentlabel=\My@saved@currentlabel
\@esphack
}%
\@ifpackageloaded{hyperref}{%
\DeclareRobustCommand\chaprefAtNoStar[1]{%
\begingroup
\let\My@GetRefArg\MyOther@GetRefArg
\ref{#1}%
\endgroup
}%
\DeclareRobustCommand\chaprefAtStar[1]{%
\begingroup
\let\My@GetRefArg\MyOther@GetRefArg
\ref*{#1}%
\endgroup
}%
\DeclareRobustCommand\chapref{%
\@ifstar\chaprefAtStar\chaprefAtNoStar
}%
}{%
\DeclareRobustCommand\chapref[1]{%
\begingroup
\let\My@GetRefArg\MyOther@GetRefArg
\ref{#1}%
\endgroup
}%
}%
}%
\makeatother
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\begin{document}
\setcounter{page}{3}
\setcounter{chapter}{1}
\chapter{abc}
\begin{theorem}\label{theo}abc\end{theorem}
Theorem \ref{theo} in chapter \chapref{theo}, page \pageref{theo} says that abc.
%%
%%Theorem \ref*{theo} in chapter \chapref*{theo}, page \pageref*{theo} says that abc.
\end{document}
如果使用超链接,带有 的超链接\chapref
不会指向相关章节的开头,而是指向在放置相应 之前放置的最后一个锚点\label
。因此,在上面的例子中,带有 的超链接\chapref{theo}
将转到相关定理的开头,尽管显示了该定理出现的章节编号。
如果使用超链接,您已“加星标”变体\ref
并\pageref
显示相关数字,但不生成超链接。因此,在超链接正在加载的还有一个“加星标”的变体\chapref
。
!!!我不知道这些粗糙的黑客行为是否会破坏任何文档类或包的功能。!!!
!!!因此我不提供任何担保。如果有东西损坏,处理零件由您自己决定。!!!
!!!由于担心破坏任何文档类或包的功能,我强烈建议使用 zref-package。!!!