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embrac.sty
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embrac.sty
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% --------------------------------------------------------------------------
% the EMBRAC package
%
% Upright Brackets in Emphasized Text
%
% --------------------------------------------------------------------------
% Clemens Niederberger
% Web: https://github.com/cgnieder/embrac/
% E-Mail: [email protected]
% --------------------------------------------------------------------------
% Copyright 2012--2021 Clemens Niederberger
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008/05/04 or later.
%
% This work has the LPPL maintenance status `maintained'.
%
% The Current Maintainer of this work is Clemens Niederberger.
% --------------------------------------------------------------------------
% The embrac package consists of the files
% - embrac.sty, embrac_en.tex, embrac_en.pdf, embrac_kerning_test.tex and
% README
% --------------------------------------------------------------------------
% > this package is strongly based on an article by Dominik Waßenhoven in
% > “Die TeXnische Komödie” 2 (2012), pp. 51--53
% > which introduces code by Bruno Le Floch. Code parts and idea used with
% > their kind permission. Many thanks!
% --------------------------------------------------------------------------
\RequirePackage { expl3 , xparse , l3keys2e }
\ProvidesExplPackage
{embrac}
{2021/02/20}
{0.9a}
{Upright Brackets in Emphasized Text}
% --------------------------------------------------------------------------
\msg_new:nnn {embrac} {patching}
{ Patching~ \token_to_str:c {#1} ... }
\msg_new:nnn {embrac} {not-patching}
{ \token_to_str:c {#1} ~ not~ defined.~ Not~ patching~ it ... }
% --------------------------------------------------------------------------
\bool_new:N \l__embrac_treat_biblatex_bool
\tl_new:N \l__embrac_tmpa_tl
\tl_new:N \l__embrac_treat_biblatex_tl
\int_new:N \l__embrac_penalty_int
\keys_define:nn {embrac}
{
biblatex .choice: ,
biblatex / true .code:n =
\bool_set_true:N \l__embrac_treat_biblatex_bool ,
biblatex / on .code:n =
\bool_set_true:N \l__embrac_treat_biblatex_bool ,
biblatex / parens .code:n =
\bool_set_true:N \l__embrac_treat_biblatex_bool ,
biblatex / false .code:n =
\bool_set_false:N \l__embrac_treat_biblatex_bool ,
biblatex / off .code:n =
\bool_set_false:N \l__embrac_treat_biblatex_bool ,
biblatex / none .code:n =
\bool_set_false:N \l__embrac_treat_biblatex_bool ,
biblatex .default:n = true
}
\prg_new_conditional:Npnn \embrac_if_fontspec: { T,F,TF }
{
\@ifpackageloaded {fontspec}
{ \prg_return_true: }
{ \prg_return_false: }
}
\cs_generate_variant:Nn \cs_generate_variant:Nn {c}
% preparations:
\cs_new_eq:NN \embrac_braces_format:n \textup
\cs_new_eq:NN \embrac_kern:n \skip_horizontal:n
\prg_new_conditional:Npnn \embrac_empty_or_no_value:n #1 { F,TF }
{
\IfNoValueTF {#1}
{ \prg_return_true: }
{
\tl_if_blank:nTF {#1}
{ \prg_return_true: }
{ \prg_return_false: }
}
}
\cs_new_protected:Npn \embrac_nobreak:
{ \tex_penalty:D 10000 \scan_stop: }
\cs_new_protected:Npn \embrac_allow_break:
{ \tex_penalty:D 0 \scan_stop: }
% --------------------------------------------------------------------------
% THE MAIN PART:
% storage of the tokens to be replaced:
\prop_new:N \l__embrac_emph_obrackets_symbol_prop
\prop_new:N \l__embrac_emph_obrackets_inner_prop
\prop_new:N \l__embrac_emph_obrackets_outer_prop
\prop_new:N \l__embrac_emph_cbrackets_symbol_prop
\prop_new:N \l__embrac_emph_cbrackets_inner_prop
\prop_new:N \l__embrac_emph_cbrackets_outer_prop
\bool_new:N \l__embrac_opening_bool
% #1: tl macro
% #2: kerning before
% #3: symbol
% #4: kerning after
% #5: code after
\cs_new_protected:Npn \__embrac_replace:Nnnnn #1#2#3#4#5
{
\tl_replace_all:Nnn #1 {#3}
{
\mode_if_math:TF
{#3}
{
\embrac_nobreak:
\embrac_kern:n {#2}
\embrac_nobreak:
\embrac_braces_format:n {#3}
\embrac_nobreak:
\embrac_kern:n {#4}
#5
}
}
}
\cs_generate_variant:Nn \__embrac_replace:Nnnnn {Nxx,Nnxx}
% do the replacing:
% #1: tl macro
\cs_new_protected:Npn \embrac_replace_brackets:N #1
{
\prop_map_inline:Nn \l__embrac_emph_obrackets_inner_prop
{
\__embrac_replace:Nxxnn #1
{ \prop_item:Nn \l__embrac_emph_obrackets_outer_prop {##1} }
{ \prop_item:Nn \l__embrac_emph_obrackets_symbol_prop {##1} }
{##2}
{ \embrac_nobreak: }
}
\prop_map_inline:Nn \l__embrac_emph_cbrackets_inner_prop
{
\__embrac_replace:Nnxxn #1
{##2}
{ \prop_item:Nn \l__embrac_emph_cbrackets_symbol_prop {##1} }
{ \prop_item:Nn \l__embrac_emph_cbrackets_outer_prop {##1} }
{
\peek_charcode:NTF \c_space_tl
{ \embrac_allow_break: }
{ \embrac_nobreak: }
}
}
}
\cs_new_protected:Npn \embrac_enparen:nnn #1#2#3
{
\embrac_nobreak:
\embrac_kern:n
{ \prop_item:Nn \l__embrac_emph_obrackets_outer_prop {#1} }
\embrac_nobreak:
\embrac_braces_format:n
{ \prop_item:Nn \l__embrac_emph_obrackets_symbol_prop {#1} }
\embrac_nobreak:
\embrac_kern:n
{ \prop_item:Nn \l__embrac_emph_obrackets_inner_prop {#1} }
#3
\embrac_nobreak:
\embrac_kern:n
{ \prop_item:Nn \l__embrac_emph_cbrackets_inner_prop {#2} }
\embrac_nobreak:
\embrac_braces_format:n
{ \prop_item:Nn \l__embrac_emph_cbrackets_symbol_prop {#2} }
\embrac_nobreak:
\embrac_kern:n
{ \prop_item:Nn \l__embrac_emph_cbrackets_outer_prop {#2} }
\peek_charcode:NTF \c_space_tl
{ \embrac_allow_break: }
{ \embrac_nobreak: }
}
% --------------------------------------------------------------------------
% biblatex compatibility:
\cs_new_protected:Npn \embrac_treat_bibparens:
{
\bool_if:NT \l__embrac_treat_biblatex_bool
{
\embrac_replace_brackets:N \bibleftbracket
\embrac_replace_brackets:N \bibrightbracket
\embrac_replace_brackets:N \bibleftparen
\embrac_replace_brackets:N \bibrightparen
}
}
\cs_new_protected:Npn \embrac_treat_bibemph:
{
\bool_if:NT \l__embrac_treat_biblatex_bool
{
\patchcmd[\protected\long]\blx@imc@mkbibemph
{\emph}{\emph*}
{}{}
\patchcmd[\protected\long]\blx@imc@mkbibitalic
{\textit}{\textit*}
{}{}
}
}
% --------------------------------------------------------------------------
% redefine \emph and friends:
\seq_new:N \l__embrac_changed_macros_seq
% #1: name of macro to be treated
\cs_new_protected:Npn \embrac_new_replacement_macro:n #1
{
\cs_if_exist:cTF {#1}
{
\msg_info:nnn {embrac} {patching} {#1}
\seq_put_right:Nn \l__embrac_changed_macros_seq {#1}
\cs_new_eq:cc {embrac_orig_#1:n} {#1~}
\cs_generate_variant:cn {embrac_orig_#1:n} {V}
\cs_new_protected:cpn {__embrac_#1:n} ##1
{
\tl_set:Nn \l__embrac_tmpa_tl {##1}
\embrac_replace_brackets:N \l__embrac_tmpa_tl
\use:c {embrac_orig_#1:V} \l__embrac_tmpa_tl
}
\cs_new_protected:cpn {embrac_#1:nn} ##1##2
{
\group_begin:
\embrac_treat_bibparens:
\tl_if_eq:nnTF {##1} {*}
{ \use:c {embrac_orig_#1:n} {##2} }
{ \use:c {__embrac_#1:n} {##2} }
\group_end:
}
\exp_args:Nc \RenewDocumentCommand {#1} {sm}
{
\IfBooleanTF {##1}
{ \use:c {embrac_#1:nn} {*} {##2} }
{ \use:c {embrac_#1:nn} { } {##2} }
}
}
{ \msg_info:nnn {embrac} {not-patching} {#1} }
}
\NewDocumentCommand \EmbracMakeKnown {m}
{ \embrac_new_replacement_macro:n {#1} }
\EmbracMakeKnown {emph}
\EmbracMakeKnown {textit}
\EmbracMakeKnown {textsl}
\AtBeginDocument
{ \embrac_if_fontspec:T { \EmbracMakeKnown {textsi} } }
% --------------------------------------------------------------------------
% TURNING EMBRAC OFF AND ON:
% turning embrac off:
\NewDocumentCommand \EmbracOff {}
{
\seq_map_inline:Nn \l__embrac_changed_macros_seq
{
\exp_args:Nc \RenewDocumentCommand {##1} {sm}
{ \use:c {embrac_orig_##1:n} {####2} }
}
}
% turning embrac on:
\NewDocumentCommand \EmbracOn {}
{
\seq_map_inline:Nn \l__embrac_changed_macros_seq
{
\exp_args:Nc \RenewDocumentCommand {##1} {sm}
{
\IfBooleanTF {####1}
{ \use:c {embrac_##1:nn} {*} {####2} }
{ \use:c {embrac_##1:nn} { } {####2} }
}
}
}
% --------------------------------------------------------------------------
% ADDING AND REMOVING BRACKETS:
% internal add commands:
\cs_new_protected:Npn \embrac_add_op_to_emph:nnn #1#2#3
{
\prop_put:Nnn \l__embrac_emph_obrackets_symbol_prop {#1} {#1}
\embrac_empty_or_no_value:nTF {#2}
{ \prop_put_if_new:Nnn \l__embrac_emph_obrackets_inner_prop {#1} {0pt} }
{ \prop_put_if_new:Nnn \l__embrac_emph_obrackets_inner_prop {#1} {#2} }
\embrac_empty_or_no_value:nTF {#3}
{ \prop_put_if_new:Nnn \l__embrac_emph_obrackets_outer_prop {#1} {0pt} }
{ \prop_put_if_new:Nnn \l__embrac_emph_obrackets_outer_prop {#1} {#3} }
}
\cs_new_protected:Npn \embrac_add_cl_to_emph:nnn #1#2#3
{
\prop_put:Nnn \l__embrac_emph_cbrackets_symbol_prop {#1} {#1}
\embrac_empty_or_no_value:nTF {#2}
{ \prop_put_if_new:Nnn \l__embrac_emph_cbrackets_inner_prop {#1} {0pt} }
{ \prop_put_if_new:Nnn \l__embrac_emph_cbrackets_inner_prop {#1} {#2} }
\embrac_empty_or_no_value:nTF {#3}
{ \prop_put_if_new:Nnn \l__embrac_emph_cbrackets_outer_prop {#1} {0pt} }
{ \prop_put_if_new:Nnn \l__embrac_emph_cbrackets_outer_prop {#1} {#3} }
}
\cs_new_protected:Npn \embrac_add_to_emph:nnnnnn #1#2#3#4#5#6
{
\embrac_add_op_to_emph:nnn {#1} {#2} {#3}
\embrac_add_cl_to_emph:nnn {#4} {#5} {#6}
}
% internal delete commands:
\cs_new_protected:Npn \embrac_remove_op_from_emph:n #1
{
\prop_remove:Nn \l__embrac_emph_obrackets_inner_prop {#1}
\prop_remove:Nn \l__embrac_emph_obrackets_outer_prop {#1}
}
\cs_new_protected:Npn \embrac_remove_cl_from_emph:n #1
{
\prop_remove:Nn \l__embrac_emph_cbrackets_inner_prop {#1}
\prop_remove:Nn \l__embrac_emph_cbrackets_outer_prop {#1}
}
\cs_new_protected:Npn \embrac_remove_from_emph:nn #1#2
{
\embrac_remove_op_from_emph:n {#1}
\embrac_remove_cl_from_emph:n {#2}
}
% internal renew commands:
\cs_new_protected:Npn \embrac_renew_op_emph:nnn #1#2#3
{
\embrac_empty_or_no_value:nTF {#2}
{ \prop_put:Nnn \l__embrac_emph_obrackets_inner_prop {#1} {0pt} }
{ \prop_put:Nnn \l__embrac_emph_obrackets_inner_prop {#1} {#2} }
\embrac_empty_or_no_value:nTF {#3}
{ \prop_put:Nnn \l__embrac_emph_obrackets_outer_prop {#1} {0pt} }
{ \prop_put:Nnn \l__embrac_emph_obrackets_outer_prop {#1} {#3} }
}
\cs_new_protected:Npn \embrac_renew_cl_emph:nnn #1#2#3
{
\embrac_empty_or_no_value:nTF {#2}
{ \prop_put:Nnn \l__embrac_emph_cbrackets_inner_prop {#1} {0pt} }
{ \prop_put:Nnn \l__embrac_emph_cbrackets_inner_prop {#1} {#2} }
\embrac_empty_or_no_value:nTF {#3}
{ \prop_put:Nnn \l__embrac_emph_cbrackets_outer_prop {#1} {0pt} }
{ \prop_put:Nnn \l__embrac_emph_cbrackets_outer_prop {#1} {#3} }
}
\cs_new_protected:Npn \embrac_renew_emph:nnnnnn #1#2#3#4#5#6
{
\embrac_renew_op_emph:nnn {#1} {#2} {#3}
\embrac_renew_cl_emph:nnn {#4} {#5} {#6}
}
% internal change commands:
\cs_new_protected:Npn \embrac_change_op_emph:nnn #1#2#3
{
\prop_if_in:NnT \l__embrac_emph_obrackets_inner_prop {#1}
{
\embrac_empty_or_no_value:nF {#2}
{ \prop_put:Nnn \l__embrac_emph_obrackets_inner_prop {#1} {#2} }
\embrac_empty_or_no_value:nF {#3}
{ \prop_put:Nnn \l__embrac_emph_obrackets_outer_prop {#1} {#3} }
}
}
\cs_new_protected:Npn \embrac_change_cl_emph:nnn #1#2#3
{
\prop_if_in:NnT \l__embrac_emph_cbrackets_inner_prop {#1}
{
\embrac_empty_or_no_value:nF {#2}
{ \prop_put:Nnn \l__embrac_emph_cbrackets_inner_prop {#1} {#2} }
\embrac_empty_or_no_value:nF {#3}
{ \prop_put:Nnn \l__embrac_emph_cbrackets_outer_prop {#1} {#3} }
}
}
\cs_new_protected:Npn \embrac_change_emph:nnnnnn #1#2#3#4#5#6
{
\embrac_change_op_emph:nnn {#1} {#2} {#3}
\embrac_change_cl_emph:nnn {#4} {#5} {#6}
}
% --------------------------------------------------------------------------
% user commands:
\NewDocumentCommand \AddEmph
{
m > { \SplitArgument {1} {,} } O{,}
m > { \SplitArgument {1} {,} } O{,}
}
{
\embrac_add_to_emph:nnnnnn {#1} #2 {#3} #4
\ignorespaces
}
\NewDocumentCommand \AddOpEmph
{ m > { \SplitArgument {1} {,} } O{,} }
{
\embrac_add_op_to_emph:nnn {#1} #2
\ignorespaces
}
\NewDocumentCommand \AddClEmph
{ m > { \SplitArgument {1} {,} } O{,} }
{
\embrac_add_cl_to_emph:nnn {#1} #2
\ignorespaces
}
\NewDocumentCommand \DeleteEmph { mm }
{
\embrac_remove_from_emph:nn {#1} {#2}
\ignorespaces
}
\NewDocumentCommand \DeleteOpEmph { mm }
{
\embrac_remove_op_from_emph:n {#1}
\ignorespaces
}
\NewDocumentCommand \DeleteClEmph { mm }
{
\embrac_remove_cl_from_emph:n {#1}
\ignorespaces
}
\NewDocumentCommand \RenewEmph
{
m > { \SplitArgument {1} {,} } O{,}
m > { \SplitArgument {1} {,} } O{,}
}
{
\embrac_renew_emph:nnnnnn {#1} #2 {#3} #4
\ignorespaces
}
\NewDocumentCommand \RenewOpEmph
{ m > { \SplitArgument {1} {,} } O{,} }
{
\embrac_renew_op_emph:nnn {#1} #2
\ignorespaces
}
\NewDocumentCommand \RenewClEmph
{ m > { \SplitArgument {1} {,} } O{,} }
{
\embrac_renew_cl_emph:nnn {#1} #2
\ignorespaces
}
\NewDocumentCommand \ChangeEmph
{
m > { \SplitArgument {1} {,} } O{,}
m > { \SplitArgument {1} {,} } O{,}
}
{
\embrac_change_emph:nnnnnn {#1} #2 {#3} #4
\ignorespaces
}
\NewDocumentCommand \ChangeOpEmph
{ m > { \SplitArgument {1} {,} } O{,} }
{
\embrac_change_op_emph:nnn {#1} #2
\ignorespaces
}
\NewDocumentCommand \ChangeClEmph
{ m > { \SplitArgument {1} {,} } O{,} }
{
\embrac_change_cl_emph:nnn {#1} #2
\ignorespaces
}
\NewDocumentCommand \embparen {+m}
{ \embrac_enparen:nnn {(} {)} {#1} }
\NewDocumentCommand \embbracket {+m}
{ \embrac_enparen:nnn {[} {]} {#1} }
\NewDocumentCommand \emb {mm+m}
{ \embrac_enparen:nnn {#1} {#2} {#3} }
% --------------------------------------------------------------------------
% add some defaults and finalize package:
\AddEmph{[}{]}[.04em,-.12em]
\AddEmph{(}[-.04em]{)}[,-.15em]
\ProcessKeysOptions {embrac}
\AtBeginDocument { \embrac_treat_bibemph: }
\file_input_stop:
% --------------------------------------------------------------------------
% HISTORY
2012/06/29 - v0.1 - first public release
2012/06/29 - v0.1a - renamed \RenewEmph => \ChangeEmph and added new \RenewEmph
2012/07/24 - v0.1b - adapted to deprecated functions in l3kernel and l3packages
2012/11/04 - v0.2 - extended `biblatex' option: parens/full
- changed buggy definition of \EmbracOff and \EmbracOn
2013/03/22 - v0.3 - made definitions robust where appropriate
- added support for `fontspec's \textsi
2013/04/04 - v0.3a - bug fix in \EmbracOn and \EmbracOff
2013/05/13 - v0.4 - added versions of \AddEmph, \RenewEmph, \DeleteEmph and
\ChangeEmph that allow setting opening or closing parts
separately
2014/05/07 - v0.5 - renaming of some internal commands
- leave brackets unchanged if in math mode
2014/06/24 - v0.6 - add support for \textsl
2014/07/03 - v0.6a - bugfix: remove unwanted (and unnecessary) expansion in
\__embrac_emph:n
2015/09/06 - v0.6b - fix https://github.com/cgnieder/embrac/issues/5
2015/11/13 - v0.6c - avoid code duplication
2016/01/07 - v0.6d - \prop_get:Nn => \prop_item:Nn
2017/07/04 - v0.7 - implement issue #8 (now treatment of symbols with catcode
other than 12 is possible)
2019/10/01 - v0.8 - fix issue #9
- new macros \embparen, \embbracket and \emb
2019/12/31 - v0.9 - new: \EmbracMakeKnown
- change penalties
2021/02/20 - v0.9a - fix issue #13