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用名称（如果有的话）或编号来引用定理

tag-icon • tag-icon formatting hyperref cross-referencing conditionals theorems
用名称（如果有的话）或编号来引用定理

我会尽量具体一点。我的情况是这样的：

在此处输入图片描述

*图片上应该写着“(...) 我需要的是能够 (...)”

尽管我在图片中解释了我需要什么，但这个问题的完美答案是让命令 \teo 决定哪种情况：有定理名称还是没有定理名称。我的一些代码如下：

\documentclass[11pt, oneside]{book}

% Commands
\newcommand{\teo}[1]{{\bfseries\upshape{\hyperref[#1]{\nameref{#1} (Teorema \ref{#1})}}}}

% Environment I've used
\usepackage{tcolorbox}
    \tcbuselibrary{skins, breakable}

\newcounter{theorem}[chapter]
\renewcommand{\thetheorem}{\arabic{chapter}.\arabic{theorem}}

\makeatletter
\newenvironment{theorem}[1][]{%
    \refstepcounter{theorem}
    \protected@edef\@currentlabelname{#1}
    \protected@edef\@currentlabel{#1}


    \tcbset{enhanced, breakable, colbacktitle = gray!50, coltitle = black, fonttitle = \bfseries, 
    attach boxed title to top left = {yshift = -\tcboxedtitleheight/2, xshift = 0.55cm}, 
    boxed title style = {rounded corners, colframe = gray!50, boxsep = 4pt},
    top = \tcboxedtitleheight/2+2mm,
    opacityframe = 0, opacityback = 0,
    borderline horizontal = {0.5mm}{0pt}{gray!50}}

    \ifstrempty{#1}%
        {\tcbset{title = Teorema \thetheorem}}%
        {\tcbset{title = #1 (Teorema \thetheorem)}}

    \begin{tcolorbox}[]\relax}{%
    \end{tcolorbox}
}
\makeatother


\begin{document}

\begin{theorem}[Theorem's Name] \label{t1}
    some text
\end{theorem}
\begin{theorem} \label{t2}
    This theorem has no name.
\end{theorem}
If I refer with \verb=\teo{t1}=, \teo{t1}, it calls the all theorem (with its name and number) and want I want is to be able to call \teo{t2} with the same command (\verb=\teo{t2}=) but without the extra-space and the parenthesis.

\end{document}

我希望我已经解释清楚了。谢谢。

答案1

您可以进入更深的层次；该名称存储在由 扩展而来的第三个括号组中\r@<label>。

我们可以检查它是否为空，并采取相应措施。

我使用\nameref*和\ref*不来创建多个链接，而只使用由生成的链接\hyperref。

\documentclass[11pt, oneside]{book}

% Packages I use
\usepackage{tcolorbox}
\tcbuselibrary{skins, breakable}

\usepackage{hyperref}

\newcounter{theorem}[chapter]
\renewcommand{\thetheorem}{\arabic{chapter}.\arabic{theorem}}

\makeatletter
\newenvironment{theorem}[1][]{%
    \refstepcounter{theorem}%
    \protected@edef\@currentlabelname{#1}%
    \tcbset{enhanced, breakable, colbacktitle = gray!50, coltitle = black, fonttitle = \bfseries, 
    attach boxed title to top left = {yshift = -\tcboxedtitleheight/2, xshift = 0.55cm}, 
    boxed title style = {rounded corners, colframe = gray!50, boxsep = 4pt},
    top = \tcboxedtitleheight/2+2mm,
    opacityframe = 0, opacityback = 0,
    borderline horizontal = {0.5mm}{0pt}{gray!50}}
    \ifstrempty{#1}%
        {\tcbset{title = Teorema \thetheorem}}%
        {\tcbset{title = #1 (Teorema \thetheorem)}}
    \begin{tcolorbox}[]\relax}{%
    \end{tcolorbox}
}

\newcommand{\teo}[1]{{%
  \normalfont\bfseries\upshape
  \@ifundefined{r@#1}{%
    % ref not yet defined
    Teorema \ref{#1}%
  }{%
    \protected@edef\@tempa{\expandafter\expandafter\expandafter\@thirdoffive\csname r@#1\endcsname}%
    \ifx\@tempa\@empty
      % no name
      \hyperref[#1]{Teorema~\ref*{#1}}%
    \else
      % theorem has name
      \hyperref[#1]{\nameref*{#1} (Teorema~\ref*{#1})}%
    \fi
  }%
}}
\makeatother


\begin{document}

\begin{theorem}[Theorem's Name] \label{t1}
    some text
\end{theorem}

\begin{theorem} \label{t2}
    This theorem has no name.
\end{theorem}

If I refer with \verb=\teo{t1}=, \teo{t1}, 
it calls the all theorem (with its name and number) 
and want I want is to be able to call \teo{t2} with 
the same command (\verb=\teo{t2}=) but without the 
extra-space and the parenthesis.

\end{document}

在此处输入图片描述

更好的实现

\documentclass[11pt, oneside]{book}

% Packages I use
\usepackage{tcolorbox}
\tcbuselibrary{skins, breakable}

\usepackage{hyperref}

\newcounter{theorem}[chapter]
\renewcommand{\thetheorem}{\arabic{chapter}.\arabic{theorem}}

\makeatletter
\newenvironment{theorem}[1][]{%
    \refstepcounter{theorem}%
    \protected@edef\@currentlabelname{#1}%
    \tcbset{enhanced, breakable, colbacktitle = gray!50, coltitle = black, fonttitle = \bfseries, 
    attach boxed title to top left = {yshift = -\tcboxedtitleheight/2, xshift = 0.55cm}, 
    boxed title style = {rounded corners, colframe = gray!50, boxsep = 4pt},
    top = \tcboxedtitleheight/2+2mm,
    opacityframe = 0, opacityback = 0,
    borderline horizontal = {0.5mm}{0pt}{gray!50}}
    \ifstrempty{#1}%
        {\tcbset{title = Teorema \thetheorem}}%
        {\tcbset{title = #1 (Teorema \thetheorem)}}
    \begin{tcolorbox}[]\relax}{%
    \end{tcolorbox}
}
\makeatother

% Commands

\NewDocumentCommand{\teoformat}{m}{\textnormal{\textbf{#1}}}

\ExplSyntaxOn

\NewDocumentCommand{\teo}{m}
 {
  \tl_if_exist:cTF { r@#1 }
   {% the reference is defined
    \peluche_teo:cn { r@#1 } { #1 }
   }
   {% the reference is not yet defined
    \teoformat{Teorema\nobreakspace\ref{#1}}%
   }
 }

\cs_new_protected:Nn \peluche_teo:Nn
 {% the reference is defined
  \exp_args:Ne \tl_if_empty:nTF { \tl_item:Nn #1 { 3 } }
   {% no name
    \hyperref[#2]{\teoformat{Teorema\nobreakspace\ref*{#2}}}
   }
   {% name exists
    \hyperref[#2]{\teoformat{\nameref*{#2}~(Teorema\nobreakspace\ref*{#2})}}
   }
 }
\cs_generate_variant:Nn \peluche_teo:Nn { c }

\ExplSyntaxOff

\begin{document}

\begin{theorem}[Theorem's Name] \label{t1}
    some text
\end{theorem}

\begin{theorem} \label{t2}
    This theorem has no name.
\end{theorem}

If I refer with \verb=\teo{t1}=, \teo{t1}, 
it calls the all theorem (with its name and number) 
and want I want is to be able to call \teo{t2} with 
the same command (\verb=\teo{t2}=) but without the 
extra-space and the parenthesis.

\end{document}

这个想法与以前相同，但更容易从中提取第三项，\r@<label>其行为类似于标记列表变量，以便稳健地测试它是否为空并采取适当的操作。

我这样介绍\teoformat，这样就可以更轻松地更改参考文献的格式，而不会因许多格式化指令而污染代码。

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