Citation in tables/figures do not comply to specific APA style rule

[mgkurtz]

Section 8.17 of the APA style requires

In tables and figures, use an ampersand between names in both parenthetical and narrative citations.

(I guess this excludes captions, at least this seems sensible and the example copyright attribution of Table 7.14 of the APA style manual spells out “[…], and M. Schaller”, likewise the copyright attribution in Figure 7.3.)

To comply with this rule, I imagine a new \tablecite command and have \textcite use it automatically if inside a table or figure.

For \tablecite, I copy pasted and edited \parencite to come up with this:

\DeclareDelimFormat[tablecite]{finalnamedelim}
  {\ifnum\value{liststop}>2 \finalandcomma\fi\addspace\&\space}
\DeclareCiteCommand{\tablecite}
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite}%
   \usebibmacro{cite:post}}
  {}
  {\usebibmacro{postnote}}
\DeclareMultiCiteCommand{\tablecites}{\tablecite}
  {\setunit{\multicitedelim}}
\DeclareCiteCommand*{\tablecite}[\mkbibparens]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{citeyear}%
   \usebibmacro{cite:post}}
  {}
  {\usebibmacro{postnote}}

Concerning recognition of tables and figures, setting a switch in a local scope should work:

\newif\ifintable
\AddToHook{env/table/begin}{\intabletrue}
\AddToHook{env/figure/begin}{\intabletrue}
\AddToHook{cmd/@makecaption/before}{\intablefalse}

I also asked on TeX Stack Exchange to get feedback whether this approach works in setups using various kinds of packages.