12

When used in concert with the hyperref package, biblatex automatically creates hyperrefs for citations but not if they are inserted using \citeyear or \citeyearpar.
Is it possible to add a hyperref to year only citations?

\documentclass{article}

\usepackage[backend=biber,natbib=true, style=authoryear-comp]{biblatex}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@article{ref1,
  author = {Doe, John D.},
  title = {Hyperrefs to citations},
  journaltitle = {Links Everywhere},
  volume = {1},
  date = {2000},
  pages = {1--2},
}

\end{filecontents}

\addbibresource{\jobname.bib}

\usepackage{hyperref}

\begin{document}

citet -- \citet{ref1}

citeyear -- \citeyear{ref1}

citeyearpar -- \citeyearpar{ref1}

\printbibliography

\end{document}

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Roey Angel
  • 1,699

3 Answers3

23

One has to redefine the citation commands instructing to use hyperlink, namely:

\DeclareCiteCommand{\citeyear}
    {}
    {\bibhyperref{\printdate}}
    {\multicitedelim}
    {}

\DeclareCiteCommand{\citeyearpar}
    {}
    {\mkbibparens{\bibhyperref{\printdate}}}
    {\multicitedelim}
    {}
Guido
  • 30,740
  • 5
    I think \printfield{year} should be preferred over \printdate in some cases: If there is a month given, the standard \citeyear command would only print the year, whereas \printdate outputs the month as well. \printfield{year} avoids this. – CL. Aug 05 '16 at 14:31
  • 4
    Actually, the ideal solution should also include the extrayear field, so that multiple publications on a same year get the correct letter after the year, e.g. 1997a, 1997b, 1997c. This can be done by replaceing \bibhyperref{\printdate} with \bibhyperref{\printfield{year}}\bibhyperref{\printfield{extrayear}} – gilbertohasnofb Feb 25 '19 at 17:46
  • I suggested an edit to the answer above as these functions should also handle prenote and postnote fields, so that one can add page numbers to them, for instance. – gilbertohasnofb Feb 25 '19 at 18:19
6

Another alternative is to use the \cite* command which is provided by all by all author-year and author-title styles. See the manual, section 3.7.2 "Style-specific Commands".

moewe
  • 175,683
Jan-Åke Larsson
  • 620
  • 1
    Be aware though that \cite* is a "style-specific" command and as such only available in authoryear and authortitle; it also changes its behaviour depending on the style used. That is with authoryear it prints the year while with authortitle it prints the title. – moewe Mar 31 '14 at 09:30
  • Yes. My feeling is that the \citeyear behaviour is intentional in biblatex, thus my hint about \cite. In a numeric citation style you want the [1]; in authortitle you want the title, along with the year. Only in authoryear does the link actually belong with the year, hence the \cite command. – Jan-Åke Larsson Mar 31 '14 at 14:00
2

Improving on Guido's answer, these are similar functions to his but with the following modifications: 1) use \printfield{year} instead of \printdate so only the year is printed, 2) use the extrayear field so that they handle multiple publications by a same author in a same year (such as 1997a, 1997b, 1997c), and 3) they can use prenote and postnote, so that one can continue to use page numbering such as in \citeyearpar[3--4]{bib_reference_id}. The functions are:

\DeclareCiteCommand{\citeyear}
    {\usebibmacro{prenote}}
    {\bibhyperref{\printfield{year}}\bibhyperref{\printfield{extrayear}}}
    {\multicitedelim}
    {\usebibmacro{cite:postnote}}

\DeclareCiteCommand{\citeyearpar}[\mkbibparens]
    {\usebibmacro{prenote}}
    {\bibhyperref{\printfield{year}}\bibhyperref{\printfield{extrayear}}}
    {\multicitedelim}
    {\usebibmacro{cite:postnote}}

Edit: this code above works with style=authoryear-ibid. If using style=authoryear, substitute both instances of cite:postnote for postnote.

gilbertohasnofb
  • 135
  • I get this error Package biblatex Error: Bibliography macro 'cite:postnote' undefined. I'm using the style=authoryear and natbib options to biblatex on texlive 2018. – Ryo Mar 15 '19 at 06:54
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    This are the options I am using with biblates: bibstyle=authoryear-ibid, citestyle=authoryear-ibid, ibidtracker=false, sorting=nyt, backend=biber, maxbibnames=9, giveninits=true, uniquename=init, doi=false, isbn=false, urldate=long, dateabbrev=false, eprint=false. Could you try using these options and see if your problem goes away? If so, it will help you figure out what option is causing the issue. – gilbertohasnofb Mar 15 '19 at 11:47
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    From the accepted answer to this question: 'Sometimes the definition of the \cite commands vary across different styles in very minute ways, this is what happens here: postnote vs cite:postnote.' So try using bibstyle=authoryear-ibid and citestyle=authoryear-ibid and see if the problem goes away. If it does, do report back so I can update my answer. – gilbertohasnofb Mar 15 '19 at 11:48
  • My options to biblatex are natbib,style=authoryear,maxcitenames=2,maxbibnames=6,giveninits=true,useprefix=true . I'll try the . . . -ibid now. – Ryo Mar 16 '19 at 12:43
  • When I changed style=authoryear to style=authoryear-ibid, the problem went away. But, I can't use the latter style. – Ryo Mar 16 '19 at 12:48
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    What do you mean you can't use the latter style? Regardless, it seems that changing both cite:postnote to postnote seems to make the problem go away with authoryear, could you check that? – gilbertohasnofb Mar 16 '19 at 16:51
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    Thanks! I confirm that postnote works with style=authoryear and cite:postnote with style=authoryear-ibid. I said that I can't use the latter style only because that doesn't fit to the standard publication style in our field of science---Sorry for my confusing comment. – Ryo Mar 18 '19 at 03:10
  • By the way, may I ask why this modification is not done in the biblatex package? – Ryo Mar 18 '19 at 03:12
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    When I get a chance, I will take a look at their source code and perhaps submit a pull request to their repository. Thanks again for confirming the fix. – gilbertohasnofb Mar 18 '19 at 12:24