% \section{Graphite/AAT code} % % \iffalse % \begin{macrocode} %<*fontspec&xetexx> % \end{macrocode} % \fi % % \begin{macro}{\@@_define_aat_feature_group:n} % \begin{macrocode} \cs_new:Nn \@@_define_aat_feature_group:n { \keys_define:nn {fontspec-aat} { #1 .multichoice: } } % \end{macrocode} % \end{macro} % % \begin{macro}{\@@_define_aat_feature:nnnn} % \begin{macrocode} \cs_new:Nn \@@_define_aat_feature:nnnn { \keys_define:nn {fontspec-aat} { #1/#2 .code:n = { \@@_make_AAT_feature:nn {#3}{#4} } } } % \end{macrocode} % \end{macro} % \begin{macro}{\@@_make_AAT_feature:nn} % \begin{macrocode} \cs_new:Nn \@@_make_AAT_feature:nn { \tl_if_empty:nTF {#1} { \@@_warning:n {aat-feature-not-exist} } { \@@_make_AAT_feature_string:nnTF {#1}{#2} { \@@_update_featstr:n {\l_fontspec_feature_string_tl} } { \@@_warning:nx {aat-feature-not-exist-in-font} {#1,#2} } } } % \end{macrocode} % \end{macro} % % \begin{macro}{\@@_make_AAT_feature_string:nnTF} % This macro takes the numerical codes for a font feature and % creates a specified macro containing the string required in the % font definition to turn that feature on or off. Used primarily in % [...], but also used to check if small caps % exists in the requested font (see page~\pageref{mac:makesmallcaps}). % % For exclusive selectors, it's easy; just grab the string: % For \emph{non}-exclusive selectors, it's a little more complex. % If the selector is even, it corresponds to switching the feature on. % If the selector is \emph{odd}, it corresponds to switching the feature off. % But \XeTeX\ doesn't return a selector string for this number, since the % feature is defined for the `switching on' value. So we need to check the % selector of the previous number, and then prefix the feature string with |!| % to denote the switch. % % Finally, save out the complete feature string in \cmd\l_fontspec_feature_string_tl. % \begin{macrocode} \prg_new_conditional:Nnn \@@_make_AAT_feature_string:nn {TF,T,F} { \tl_set:Nx \l_tmpa_tl { \XeTeXfeaturename \l_fontspec_font #1 } \tl_if_empty:NTF \l_tmpa_tl { \prg_return_false: } { \int_compare:nTF { \XeTeXisexclusivefeature\l_fontspec_font #1 > 0 } { \tl_set:Nx \l_tmpb_tl {\XeTeXselectorname\l_fontspec_font #1\space #2} } { \int_if_even:nTF {#2} { \tl_set:Nx \l_tmpb_tl {\XeTeXselectorname\l_fontspec_font #1\space #2} } { \tl_set:Nx \l_tmpb_tl { \XeTeXselectorname\l_fontspec_font #1\space \numexpr#2-1\relax } \tl_if_empty:NF \l_tmpb_tl { \tl_put_left:Nn \l_tmpb_tl {!} } } } \tl_if_empty:NTF \l_tmpb_tl { \prg_return_false: } { \tl_set:Nx \l_fontspec_feature_string_tl { \l_tmpa_tl = \l_tmpb_tl } \prg_return_true: } } } % \end{macrocode} % \end{macro} % % \iffalse % \begin{macrocode} % % \end{macrocode} % \fi