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Diffstat (limited to 'macros/unicodetex/latex/fontspec/fontspec-code-graphite.dtx')
-rw-r--r-- | macros/unicodetex/latex/fontspec/fontspec-code-graphite.dtx | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/macros/unicodetex/latex/fontspec/fontspec-code-graphite.dtx b/macros/unicodetex/latex/fontspec/fontspec-code-graphite.dtx new file mode 100644 index 0000000000..c840d2af60 --- /dev/null +++ b/macros/unicodetex/latex/fontspec/fontspec-code-graphite.dtx @@ -0,0 +1,128 @@ +%%^^A%% fontspec-code-graphite.dtx -- part of FONTSPEC <wspr.io/fontspec> + +% \section{Graphite/AAT code} +% +% \iffalse +% \begin{macrocode} +%<*fontspec&XE> +% \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} } + { + \exp_args:No \@@_make_AAT_feature_string:NnnTF \l_@@_fontface_cs_tl {#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:NnnTF} +% 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:Nnn {TF,T,F} + { + \tl_set:Nx \l_@@_tmpa_tl { \XeTeXfeaturename #1 #2 } + \tl_if_empty:NTF \l_@@_tmpa_tl + { \prg_return_false: } + { + \int_compare:nTF { \XeTeXisexclusivefeature #1 #2 > 0 } + { + \tl_set:Nx \l_@@_tmpb_tl {\XeTeXselectorname #1 #2\space #3} + } + { + \int_if_even:nTF {#3} + { + \tl_set:Nx \l_@@_tmpb_tl {\XeTeXselectorname #1 #2\space #3} + } + { + \tl_set:Nx \l_@@_tmpb_tl + { + \XeTeXselectorname #1 #2\space \numexpr#3-1\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} +%</fontspec&XE> +% \end{macrocode} +% \fi + + +\endinput + +% /© +% ------------------------------------------------ +% The FONTSPEC package <wspr.io/fontspec> +% ------------------------------------------------ +% Copyright 2004-2020 Will Robertson, LPPL "maintainer" +% Copyright 2009-2015 Khaled Hosny +% Copyright 2013 Philipp Gesang +% Copyright 2013-2016 Joseph Wright +% ------------------------------------------------ +% This package is free software and may be redistributed and/or modified under +% the conditions of the LaTeX Project Public License, version 1.3c or higher +% (your choice): <http://www.latex-project.org/lppl/>. +% ------------------------------------------------ +% ©/ |