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-% --------------------------------------------------------------------------
-%
-% the CHEMMACROS package -- module: `polymers'
-%
-% --------------------------------------------------------------------------
-% Clemens Niederberger
-% --------------------------------------------------------------------------
-% https://github.org/cgnieder/chemmacros/
-% contact@mychemistry.eu
-% --------------------------------------------------------------------------
-% If you have any ideas, questions, suggestions or bugs to report, please
-% feel free to contact me.
-% --------------------------------------------------------------------------
-% Copyright 2011--2020 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 1.3 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.
-% --------------------------------------------------------------------------
-\ChemModule{polymers}{2018/03/02 polymers}
-
-\chemmacros_load_modules:n {nomenclature,tikz}
-
-% --------------------------------------------------------------------------
-% copolymers
-\NewChemIUPAC \copolymer { \textit {co} }
-\LetChemIUPAC \co \copolymer
-
-\NewChemIUPAC \statistical { \textit {stat} }
-\LetChemIUPAC \stat \statistical
-
-\NewChemIUPAC \random { \textit {ran} }
-\LetChemIUPAC \ran \random
-
-\NewChemIUPAC \alternating { \textit {alt} }
-\LetChemIUPAC \alt \alternating
-
-\NewChemIUPAC \periodic { \textit {per} }
-\LetChemIUPAC \per \periodic
-
-\NewChemIUPAC \block { \textit {block} }
-\NewChemIUPAC \graft { \textit {graft} }
-
-% --------------------------------------------------------------------------
-% non-linear (co)polymers
-\NewChemIUPAC \blend { \textit {blend} }
-\NewChemIUPAC \comb { \textit {comb} }
-
-\NewChemIUPAC \complex { \textit {compl} }
-\LetChemIUPAC \compl \complex
-
-\NewChemIUPAC \cyclic { \textit {cyclo} }
-\LetChemIUPAC \cyclo \cyclic
-
-\NewChemIUPAC \branch { \textit {branch} }
-\NewChemIUPAC \network { \textit {net} }
-\LetChemIUPAC \net \network
-
-\NewChemIUPAC \ipnetwork { \textit {ipn} }
-\LetChemIUPAC \ipn \ipnetwork
-
-\NewChemIUPAC \sipnetwork { \textit {sipn} }
-\LetChemIUPAC \sipn \sipnetwork
-
-\NewChemIUPAC \star { \textit {star} }
-
-% --------------------------------------------------------------------------
-
-\tl_new:N \l__chemmacros_polymer_delimiter_left_tl
-\tl_new:N \l__chemmacros_polymer_delimiter_right_tl
-
-\tl_new:N \l__chemmacros_polymer_subscript_tl
-\tl_new:N \l__chemmacros_polymer_superscript_tl
-
-\dim_new:N \l__chemmacros_polymer_delimiter_height_dim
-\dim_new:N \l__chemmacros_polymer_delimiter_depth_dim
-
-\cs_new_protected:Npn \__chemmacros_set_polymer_delimiters:NN #1#2
- {
- \tl_set:Nn \l__chemmacros_polymer_delimiter_left_tl {#1}
- \tl_set:Nn \l__chemmacros_polymer_delimiter_right_tl {#2}
- }
-
-% #1: height
-% #2: depth
-% #3: opening node
-% #4: closing node
-% #5: subscript
-% #6: superscript
-\cs_new_protected:Npn \chemmacros_make_polymer_braces:nnnnnn #1#2#3#4#5#6
- {
- \dim_set:Nn \l__chemmacros_polymer_delimiter_height_dim { (#1+#2)/2 }
- \dim_set:Nn \l__chemmacros_polymer_delimiter_depth_dim { (#1-#2)/2 }
- \chemmacros_tikz_picture:nn {remember~ picture, overlay }
- {
- \chemmacros_tikz_node:n
- { at = (#3) , yshift = \l__chemmacros_polymer_delimiter_depth_dim }
- {
- \c_math_toggle_token
- \tex_left:D \l__chemmacros_polymer_delimiter_left_tl
- \tex_vrule:D
- height \l__chemmacros_polymer_delimiter_height_dim
- depth \l__chemmacros_polymer_delimiter_height_dim
- width \c_zero_dim
- \tex_right:D .
- \c_math_toggle_token
- } ;
- \chemmacros_tikz_node:n
- { at = (#4) , yshift = \l__chemmacros_polymer_delimiter_depth_dim }
- {
- \c_math_toggle_token
- \tex_left:D .
- \tex_vrule:D
- height \l__chemmacros_polymer_delimiter_height_dim
- depth \l__chemmacros_polymer_delimiter_height_dim
- width \c_zero_dim
- \tex_right:D \l__chemmacros_polymer_delimiter_right_tl
- \c_math_subscript_token
- {
- \hbox_overlap_right:n
- {
- \chemmacros_if_compatibility:nnTF {>} {5.8b}
- { \smash {#5} }
- {#5}
- }
- }
- \c_math_superscript_token
- {
- \hbox_overlap_right:n
- {
- \chemmacros_if_compatibility:nnTF {>} {5.8b}
- { \smash {#6} }
- {#6}
- }
- }
- \c_math_toggle_token
- } ;
- }
- }
-\cs_generate_variant:Nn \chemmacros_make_polymer_braces:nnnnnn {nnnnVV}
-
-\chemmacros_define_keys:nn {polymers}
- {
- delimiters .code:n = \__chemmacros_set_polymer_delimiters:NN #1 ,
- delimiters .initial:n = [] ,
- superscript .tl_set:N = \l__chemmacros_polymer_superscript_tl ,
- subscript .tl_set:N = \l__chemmacros_polymer_subscript_tl ,
- subscript .initial:n = $n$
- }
-
-\NewDocumentCommand \makepolymerdelims {O{}momm}
- {
- \group_begin:
- \chemmacros_set_keys:nn {polymers} {#1}
- \IfNoValueTF {#3}
- {
- \chemmacros_make_polymer_braces:nnnnVV {#2} {#2} {#4} {#5}
- \l__chemmacros_polymer_subscript_tl
- \l__chemmacros_polymer_superscript_tl
- }
- {
- \chemmacros_make_polymer_braces:nnnnVV {#2} {#3} {#4} {#5}
- \l__chemmacros_polymer_subscript_tl
- \l__chemmacros_polymer_superscript_tl
- }
- \group_end:
- }
-
-% --------------------------------------------------------------------------
-\file_input_stop:
-
-2016/03/07 - first version
-2016/03/08 - \makepolymerdelims
-2018/03/02 - smash sub- and superscripts of polymer delimiters