Link full citation label in biblatex APA style

Question

I am using BibLaTeX for my references but as you see in my attached image it only colors and links the year and not the rest of it. Why is that? How can I change that?

MWE

\documentclass{book}

\usepackage{fontspec}

\setmainfont
[%
  Path = Fonts/NotoSans/,
  UprightFont = *Regular,
  BoldFont = *Bold,
  ItalicFont = *Italic,
  BoldItalicFont = *BoldItalic
]{NotoSans.ttf}

\usepackage[greek, english]{babel}

\usepackage{csquotes}
\usepackage[style=apa]{biblatex}
\DeclareLanguageMapping{english}{english-apa}
\DeclareLanguageMapping{greek}{greek-apa}
\addbibresource{Bibliography.bib}

\usepackage[
    colorlinks,
    citecolor=blue,
    urlcolor=blue,
    bookmarks=false,
    hypertexnames=true
]{hyperref} 

\begin{document}

Text \parencite{author1}

\printbibliography
\addcontentsline{toc}{chapter}{Bibliography}

\end{document}

Bib

@book{author1,
  title={Book Title},
  author={Author},
  year={2014},
  publisher={Publisher}
}

Answer 1

As I wrote in the comments I don't think we can explain the why conclusively. The fact of the matter is that all biblatex standard styles have only ever linked the year (in author-year styles or title in author-title styles). Over the time various arguments have been made that all come down to saying that this allows for unambiguous links in -comp situation, where we might have

Knuth (1984, 1986)

(If we wanted to link the author here as well should it link to the 1984 or 1986 work?)

Whether or not you buy that argument is of course a different question.

In any case I can confidently say that the solution only linking the year is much easier to implement and avoids unfortunate edge cases that could otherwise be problematic. This might not be immediately obvious for a simple \parencite in style=authoryear, but there are many subtleties with the implementation of \textcite in style=authoryear-comp, for example that make full linking much trickier. This is mainly related to use of the punctuation buffer and the exact scope of the produced link.

Linking and cite colouring face the same underlying issues, so we can look at Custom citation (coloured) for select keys only to try and see if we can get more linking to work in APA style. The following solution is in my opinion the cleanest solution that produces the fullest links possible without having to rewrite how large parts of the code in biblatex-apa work.

Please note that biblatex-apa code is subject to change. This code here may not work for all versions. It was tested with v9.16 (2022/06/22). Leave a comment if this no longer works for the current biblatex-apa version on CTAN.

\documentclass{article}
\usepackage[style=apa,backend=biber]{biblatex}
\usepackage{hyperref}
\makeatletter
\renewbibmacro*{cite:author}{%
  \iffieldequals{namehash}{\cbx@lasthash}
% Multiple cites in one command
   {\setunit{\compcitedelim}%
    \printtext[bibhyperref]{%
      \usebibmacro{cite:plabelyear+extradate}}}%
% Single cite
   {\printtext[bibhyperref]{%
      \ifnameundef{labelname}
% No author/editor
       {\usebibmacro{cite:noname}%
         \savefield{namehash}{\cbx@lasthash}}
% Normal cite
       {\ifnameundef{shortauthor}
         {\printnames{labelname}}%
         {\cbx@apa@ifnamesaved
            {\printnames{shortauthor}}
            {\printnames[labelname]{author}%
             \addspace\printnames[sabrackets]{shortauthor}}}%
          \savefield{namehash}{\cbx@lasthash}}}}%
   \setunit{\multicitedelim}}
\renewbibmacro*{cite}{%
  \iffieldequals{namehash}{\cbx@lasthash}
% Multiple cites in one command
   {\setunit{\compcitedelim}%
    \printtext[bibhyperref]{%
      \usebibmacro{cite:plabelyear+extradate}}}%
% Single cite
   {\printtext[bibhyperref]{%
      \ifnameundef{labelname}
% No author/editor
       {\usebibmacro{cite:noname}%
         \setunit{\printdelim{nameyeardelim}}%
         \usebibmacro{cite:plabelyear+extradate}%
         \savefield{namehash}{\cbx@lasthash}}
% Normal cite
       {\ifnameundef{shortauthor}
         {\printnames{labelname}}%
         {\cbx@apa@ifnamesaved
           {\printnames{shortauthor}}
           {\printnames[labelname]{author}%
            \addspace\printnames[sabrackets]{shortauthor}}}%
         \setunit{\printdelim{nameyeardelim}}%
        \usebibmacro{cite:plabelyear+extradate}%
        \savefield{namehash}{\cbx@lasthash}}}}%
   \setunit{\multicitedelim}}
\renewbibmacro*{textcite}{%
  \iffieldequals{namehash}{\cbx@lasthash}
% Compact cite - more than one thing for same author
    {\setunit{\compcitedelim}%
     \printtext[bibhyperref]{%
       \usebibmacro{cite:plabelyear+extradate}}}
% New cite
    {\ifbool{cbx:parens}
       {\bibcloseparen\global\boolfalse{cbx:parens}}
       {}%
     \setunit{\textcitedelim}%
     \ifnameundef{labelname}
     % No author/editor
       {\iffieldundef{shorthand}%
    % Cite using title
         {\printtext[bibhyperref]{\usebibmacro{cite:noname}}%
          \setunit{\global\booltrue{cbx:parens}%
                   \printdelim{nonameyeardelim}%
                   \bibopenparen}%
          \printtext[bibhyperref]{%
            \usebibmacro{cite:plabelyear+extradate}}}
    % Cite using shorthand
         {\printtext[bibhyperref]{%
            \usebibmacro{cite:shorthand}}}}
  % Normal cite with author/editor
  % Normal full cite
       {\printtext[bibhyperref]{%
          \ifnameundef{shortauthor}%
    % Normal full cite
           {\printnames{labelname}}
    % Cite using short author
           {\cbx@apa@ifnamesaved
             {\printnames{shortauthor}}
             {\printnames[labelname]{author}}}}%
  % Year
        \setunit{\global\booltrue{cbx:parens}%
                 \printdelim{nameyeardelim}%
                 \bibopenparen}%
  % Put the shortauthor inside the year brackets if necessary
        \printtext[bibhyperref]{%
          \ifnameundef{shortauthor}
           {}
           {\cbx@apa@ifnamesaved
             {}
             {\printnames{shortauthor}%
              \setunit{\printdelim{innernameyeardelim}}}}%
  % Print prenote (belongs to first cite)
        \ifnumequal{\value{citecount}}{1}
           {\usebibmacro{prenote}}
           {}%
  % Actual year printing
        \usebibmacro{cite:plabelyear+extradate}%
  % Save name hash for checks later
        \savefield{namehash}{\cbx@lasthash}}%
    \stepcounter{textcitecount}}}}
\renewbibmacro{cite:plabelyear+extradate}{%
  \iffieldundef{labelyear}{}
    {\clearfield{labelmonth}% don't want months in citations
     \clearfield{labelday}% don't want days in citations
     \clearfield{labelendmonth}% don't want months in citations
     \clearfield{labelendday}% don't want days in citations
     \clearfield{labelyeardivision}% don't want yeardivisions in citations
     \clearfield{labelendyeardivision}% don't want yeardivisions in citations
     \iffieldsequal{labelyear}{labelendyear}% Don't want no-op year ranges
       {\clearfield{labelendyear}}
       {}%
     \iffieldundef{origyear}
       {}
       {\printorigdate%
        \setunit{\addslash}}%
     \iffieldundef{related}
       {}
       {\iffieldequalstr{relatedtype}{reprintfrom}
         {\entrydata{\thefield{related}}{\printlabeldateextra}%
          \setunit{\addslash}}
         {}}%
     \printlabeldateextra}}
\renewbibmacro*{citeyear}{%
  \iffieldundef{labelyear}
    {\usebibmacro{cite:init}}
    {\iffieldequals{namehash}{\cbx@lasthash}
       {\setunit{\compcitedelim}%
        \printtext[bibhyperref]{\usebibmacro{cite:plabelyear+extradate}}}
       {\printtext[bibhyperref]{\usebibmacro{cite:plabelyear+extradate}}%
        \savefield{namehash}{\cbx@lasthash}}}%
  \setunit{\multicitedelim}}
\makeatother
\addbibresource{biblatex-examples.bib}
\begin{document}
Lorem \parencite{sigfridsson}
ipsum \parencite{knuth:ct:a,knuth:ct:b}
dolor \parencite{nussbaum,geer,worman}
Lorem \textcite{sigfridsson}
ipsum \textcite{knuth:ct:a,knuth:ct:b}
dolor \textcite{nussbaum,geer,worman}
\printbibliography
\end{document}