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%% Copyright (C) 2020 Eduardo C. Lourenço de Lima
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either
%% version 1.3 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 1.3 or later is part of all distributions of LaTeX
%% version 2005/12/01 or later.
%%
%\NeedsTeXFormat{LaTeX2e}[1996/06/01]
\RequirePackage{expl3}
\RequirePackage{xparse}
\ProvidesExplPackage {classics} {2020/02/03} {0.1a} {Cite classic works}
\tl_new:N \g_classics_style_range_separator_tl
\tl_new:N \g_classics_style_separator_tl
\tl_set:Nn \g_classics_style_range_separator_tl {--}
\tl_set:Nn \g_classics_style_separator_tl {|}
\bool_new:N \g__classics_plural_prefix_bool
\cs_generate_variant:Nn \seq_set_split:Nnn {cVn}
% * [<range separator>] {<basename>} {<code>}
\NewDocumentCommand \newclassic {somm}
{
\seq_new:c {g_classics_#3_style_seq}
\tl_new:c {g_classics_#3_range_separator_tl}
\IfValueTF {#2}
{\tl_set:cn {g_classics_#3_range_separator_tl} {#2}}
{\tl_set:cn {g_classics_#3_range_separator_tl} {\tl_use:N \g_classics_style_range_separator_tl}}
\classics_style_set:nn {#3} {#4}
% * (<last page>) [<title>] {<page>} [<section>]
\exp_after:wN \NewDocumentCommand \cs:w #3\cs_end: { sd()omO{}O{}O{}O{}O{} }
{
%Title: Typeset the optional title
\IfValueT {##3}
{
\group_begin:
\frenchspacing \classics_title_format:n {##3}
\tl_if_blank:nTF {##4} {}{~}
\group_end:
}
%Range: Typeset page when last page is provided only if they differ
\bool_if:nTF { (! #1) && \str_if_eq_p:ee{##2}{##4} }
{
\classics_style_map:nnnnnnn{#3} {} {##5}{##6}{##7}{##8}{##9}
}
{
\classics_style_map:nnnnnnn{#3}{##4}{##5}{##6}{##7}{##8}{##9}
}
%Starred:
\IfBooleanT {##1} {\tl_use:c {g_classics_#3_range_separator_tl}\cs:w #3\cs_end:(##4)}
}
}
% {<code>}
\NewDocumentCommand \DeclareClassicWorkFormat {m} {\cs_set:Npn \classics_title_format:n ##1 {#1}}
% {<string>}
\cs_new:Npn \classics_title_format:n #1 {\textit{#1}}
% {<basename>} {<string>}
\cs_new:Npn \classics_style_set:nn #1#2
{
\seq_set_split:cVn {g_classics_#1_style_seq} \g_classics_style_separator_tl {#2}
}
% {<basename>} {<value>}
\cs_new:Npn \classics_style_map:nnnnnnn #1#2#3#4#5#6#7
{
\seq_set_split:Nnn \l_tmpa_seq {} {{#2} {#3} {#4} {#5} {#6} {#7}}
\cs_generate_variant:Nn \seq_mapthread_function:NNN {cNN}
\seq_mapthread_function:cNN {g_classics_#1_style_seq} \l_tmpa_seq \classics_style_apply:nn
}
% {<style>} {<value>}
\cs_new:Npn \classics_style_apply:nn #1#2
{
\tl_if_blank:nTF {#2}
{}
{
\cs_set:Npn \__classics_style_apply:n ##1 {#1}
\__classics_style_apply:n {#2}
}
}
% {<code>}
\cs_new:Npn \__classics_style_apply:n #1 {}
% ********************************** Misc *************************************
\NewDocumentCommand \classicsalph {m} {\int_to_alph:n {#1}}
\NewDocumentCommand \classicsAlph {m} {\int_to_Alph:n {#1}}
\NewDocumentCommand \classicsroman {m} {\int_to_roman:n{#1}}
\NewDocumentCommand \classicsRoman {m} {\int_to_Roman:n{#1}}
% ------------------------------ Plural prefix --------------------------------
% {<command>} {<singular>} {<plural>} {<and>}
\NewDocumentCommand \newpagination {mmmm}
{
% \exp_after:wN \NewDocumentCommand \cs:w #1\cs_end: {m}
\NewDocumentCommand #1 {m}
{
\classics_plural_prefix:nnnn {#2} {#3} {#4} {##1}
{~##1}
}
}
% {<singular>} {<plural>} {<and>} {<string>}
\cs_new:Npn \classics_plural_prefix:nnnn #1#2#3#4
{
\bool_set_false:N \g__classics_plural_prefix_bool
\tl_if_in:nnT {#4} {#3} {\bool_set_true:N \g__classics_plural_prefix_bool}
\tl_if_in:nnT {#4} {-} {\bool_set_true:N \g__classics_plural_prefix_bool}
\tl_if_in:nnT {#4} {,} {\bool_set_true:N \g__classics_plural_prefix_bool}
\bool_if:nTF \g__classics_plural_prefix_bool {#2} {#1}
}
\endinput
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