Using hypertarget caption in hyperlink caption

Question

I want to use hypertarget caption in hyperlink caption automatically.

Example:

\hypertarget{myTarget}{My Target}

See \hyperlink{myTarget}{\useMyTargetCaption}.

Wanted result:

My Target

See My Target.

Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. — karlkoeller, Apr 01 '14 at 06:34

karlkoeller · Accepted Answer · 2014-04-01T11:01:55.130

14

You can redefine \hypertarget so that it defines a new command corresponding to its first argument:

\let\oldhypertarget\hypertarget
\renewcommand{\hypertarget}[2]{%
  \oldhypertarget{#1}{#2}%
    \protected@write\@mainaux{}{%
        \string\expandafter\string\gdef
          \string\csname\string\detokenize{#1}\string\endcsname{#2}%
    }%
  }

In this way, when you issue

\hypertarget{myTarget}{My Target}

this also saves a command named \myTarget in the .aux file.

Then we define a new command \myhyperlink that takes care of that:

\newcommand{\myhyperlink}[1]{%
  \hyperlink{#1}{\csname #1\endcsname}%
  }

When you issue

\myhyperlink{myTarget}

this results in

\hyperlink{myTarget}{\myTarget}

MWE:

\documentclass{article}

\usepackage[colorlinks]{hyperref}

\makeatletter
\let\oldhypertarget\hypertarget
\renewcommand{\hypertarget}[2]{%
  \oldhypertarget{#1}{#2}%
    \protected@write\@mainaux{}{%
        \string\expandafter\string\gdef
          \string\csname\string\detokenize{#1}\string\endcsname{#2}%
    }%
  }
\newcommand{\myhyperlink}[1]{%
  \hyperlink{#1}{\csname #1\endcsname}%
  }
\makeatother

\begin{document}

\hypertarget{myTarget}{My Target}

See \myhyperlink{myTarget}.

\end{document}

Output:

enter image description here

If you want to customize it, you can change it, for example, to (requires xcolor package`):

\newcommand{\myhyperlink}[1]{%
  \hyperlink{#1}{\textcolor{cyan}{\textit{\csname #1\endcsname}}}%
  }

and the result will be:

enter image description here

edited Apr 01 '14 at 11:01

answered Apr 01 '14 at 06:34

karlkoeller

124,410

Thank you. As in this case, how to add spaces to label's name? – Supert Apr 01 '14 at 08:50
@Supert I misunderstood. Now the answer is completely different. – karlkoeller Apr 01 '14 at 09:13
Yes, but there is a bug: if you place link before target, link will be empty. – Supert Apr 01 '14 at 09:34
As far as I can see, myLink is trying to call myTarget.csname before it is defined – Supert Apr 01 '14 at 09:39
If we return back to your previous answer, how we can add spaces to label's name? Well, it is workaround, but it is better than disappearing ninja links. – Supert Apr 01 '14 at 10:03
@Supert In the old answer it was showing the label, not the text, so there's no chance to print a space. – karlkoeller Apr 01 '14 at 10:07
that's bad. Any idea to make 'See \myhyperlink{myTarget}. \hypertarget{myTarget}{My Target}' work? – Supert Apr 01 '14 at 10:10
@Supert Now it should work fine. – karlkoeller Apr 01 '14 at 11:04
@Supert You're welcome. It took me some time, but at the end I've found a working solution :-) – karlkoeller Apr 01 '14 at 11:24
Can I deduce from this that the links implemented with \hypertarget and \hyperlink do NOT add anything to the .aux file? That is, they employ some internal mechanism within the PDF itself? – user127421 Mar 07 '23 at 14:29

Using hypertarget caption in hyperlink caption

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