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‎README

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Package: Highlight codes and demos with LaTeX3
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Author: Jianrui Lyu <[email protected]>
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Repository: https://github.com/lvjr/codehigh
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License: The LaTeX Project Public License 1.3c

‎codehigh.sty

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%%% -*- coding: utf-8 -*-
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%%% ----------------------------------------------------------------------------
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%%% Codehigh : Highlight codes and demos with LaTeX3
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%%% Author : Jianrui Lyu <[email protected]>
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%%% Repository: https://github.com/lvjr/codehigh
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%%% License : The LaTeX Project Public License 1.3c
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%%% ----------------------------------------------------------------------------
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\NeedsTeXFormat{LaTeX2e}
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\RequirePackage{expl3}
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\ProvidesExplPackage{codehigh}{2021-04-11}{2021A}
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{Highlight codes and demos with LaTeX3}
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%\RequirePackage{xparse}
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\RequirePackage{xcolor}
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\RequirePackage{ninecolors}
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\ExplSyntaxOn
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\int_new:N \l__codehigh_a_int
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\int_new:N \l__codehigh_b_int
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\tl_new:N \l__codehigh_a_tl
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\tl_new:N \l__codehigh_b_tl
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\tl_new:N \l__codehigh_c_tl
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\tl_new:N \l__codehigh_d_tl
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\tl_new:N \l__codehigh_m_tl
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\cs_generate_variant:Nn \regex_set:Nn { cn }
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\cs_generate_variant:Nn \str_remove_once:Nn { NV }
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\cs_generate_variant:Nn \tl_set_rescan:Nnn { NnV }
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%\prg_generate_conditional_variant:Nnn \regex_extract_once:nnN { vVN } { TF }
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\prg_generate_conditional_variant:Nnn \regex_extract_once:NnN { cVN } { T, TF }
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\prg_generate_conditional_variant:Nnn \regex_split:NnN { cVN } { T, TF }
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\NewDocumentEnvironment { codehigh } { }
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{
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\bgroup
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\__codehigh_do_specials:
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\begin{codehigh@aux}
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}
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{
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\end{codehigh@aux}
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\egroup
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\__codehigh_typeset_code:
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}
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\NewDocumentEnvironment { demohigh } { }
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{
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\bgroup
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\__codehigh_do_specials:
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\begin{codehigh@aux}
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}
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{
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\end{codehigh@aux}
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\egroup
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\__codehigh_typeset_code:
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\__codehigh_typeset_demo:
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}
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\cs_new_protected:Npn \__codehigh_do_specials:
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{
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\obeylines
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\obeyspaces
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\catcode `\% = 12
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}
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\tl_new:N \g__codehigh_code_tl
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\NewDocumentEnvironment { codehigh@aux } { +b }
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{
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\tl_gset:Nn \g__codehigh_code_tl { #1 }
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\tl_log:N \g__codehigh_code_tl
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}
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{ }
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\cs_new_protected:Npn \__codehigh_typeset_code:
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{
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\tl_set_eq:NN \l_tmpa_tl \g__codehigh_code_tl
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\regex_replace_all:nnN { . } { \c{string} \0 } \l_tmpa_tl
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\tl_set:Nx \l_tmpa_tl { \l_tmpa_tl }
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\tl_set_eq:NN \l_tmpb_tl \l_tmpa_tl
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%\__codehigh_typeset_code_plain:N \l_tmpa_tl
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\group_begin:
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\setlength { \parindent } { 0pt }
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\ttfamily
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\__codehigh_parse_code:nN { latex } \l_tmpb_tl
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\group_end:
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}
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\cs_new_protected:Npn \__codehigh_typeset_code_plain:N #1
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{
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\group_begin:
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\regex_replace_all:nnN { \^^M } { \c{par} } #1
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\setlength { \parindent } { 0pt }
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\ttfamily
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\tl_use:N #1
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\group_end:
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}
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\cs_new_protected:Npn \__codehigh_typeset_demo:
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{
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\tl_set_eq:NN \l_tmpb_tl \g__codehigh_code_tl
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\tl_set_rescan:NnV \l_tmpb_tl
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{
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\catcode `\% = 14 \relax
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\catcode `\^^M = 10 \relax
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}
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\l_tmpb_tl
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\tl_log:N \l_tmpb_tl
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\par
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\tl_use:N \l_tmpb_tl
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}
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\int_new:N \l__codehigh_latex_syntax_count_int
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%% #1: language name, #2: regex, #3: style name
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\cs_new_protected:Npn \__codehigh_add_syntax:nnn #1 #2 #3
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{
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\int_incr:c { l__codehigh_ #1 _syntax_count_int }
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\regex_set:cn
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{ l__codehigh_ #1 _ \int_use:c { l__codehigh_ #1 _syntax_count_int } _regex }
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{ #2 }
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\tl_set:cn
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{ l__codehigh_ #1 _ \int_use:c { l__codehigh_ #1 _syntax_count_int } _tl }
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{ #3 }
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}
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\__codehigh_add_syntax:nnn { latex } { \% .*? \^^M } { Comment }
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\__codehigh_add_syntax:nnn { latex } { \& } { Alignment }
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\__codehigh_add_syntax:nnn { latex } { \\ (begin|end) } { BeginEnd }
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\__codehigh_add_syntax:nnn { latex } { \\ \\ } { Newline }
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\__codehigh_add_syntax:nnn { latex } { \\ [A-Za-z]+ } { Command }
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%% #1: style name, #2: commands
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\cs_new_protected:Npn \__codehigh_add_style:nn #1 #2
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{
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\tl_set:cn { l__codehigh_style_ #1 _tl } { #2 }
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}
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\__codehigh_add_style:nn { Default } { \color{black} }
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\__codehigh_add_style:nn { Alignment } { \color{brown3} }
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\__codehigh_add_style:nn { BeginEnd } { \color{blue3} }
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\__codehigh_add_style:nn { Command } { \color{teal3} }
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\__codehigh_add_style:nn { Comment } { \color{gray3} }
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\__codehigh_add_style:nn { Newline } { \color{purple3} }
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\int_new:N \l__codehigh_item_count_int
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\tl_new:N \l__codehigh_code_to_parse_tl
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\tl_new:N \l__codehigh_regex_match_name_tl
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\tl_new:N \l__codehigh_regex_match_text_tl
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\tl_new:N \l__codehigh_regex_before_text_tl
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\cs_new_protected:Npn \__codehigh_parse_code:nN #1 #2
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{
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\tl_set_eq:NN \l__codehigh_code_to_parse_tl #2
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\bool_do_until:nn { \tl_if_empty_p:N \l__codehigh_code_to_parse_tl }
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{
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\__codehigh_parse_code_once:nN { #1 } \l__codehigh_code_to_parse_tl
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\int_compare:nNnTF { \l__codehigh_item_count_int } = { -1 }
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{
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\__codehigh_typeset_text:nN { Default } \l__codehigh_code_to_parse_tl
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\tl_clear:N \l__codehigh_code_to_parse_tl
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}
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{
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\tl_concat:NNN \l__codehigh_a_tl
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\l__codehigh_regex_before_text_tl \l__codehigh_regex_match_text_tl
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\str_remove_once:NV \l__codehigh_code_to_parse_tl \l__codehigh_a_tl
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\tl_log:N \l__codehigh_code_to_parse_tl
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\__codehigh_typeset_text:nN { Default } \l__codehigh_regex_before_text_tl
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\__codehigh_typeset_text:VN \l__codehigh_regex_match_name_tl \l__codehigh_regex_match_text_tl
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}
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}
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}
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\cs_new_protected:Npn \__codehigh_parse_code_once:nN #1 #2
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{
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\int_set:Nn \l__codehigh_item_count_int { -1 }
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\tl_clear:N \l__codehigh_regex_match_text_tl
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\tl_clear:N \l__codehigh_regex_before_text_tl
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\int_step_inline:nn { \l__codehigh_latex_syntax_count_int }
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{
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\regex_extract_once:cVNT { l__codehigh_ #1 _ ##1 _regex } #2 \l_tmpa_seq
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{
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\seq_get:NN \l_tmpa_seq \l__codehigh_m_tl
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\regex_split:cVNT { l__codehigh_ #1 _ ##1 _regex } #2 \l_tmpb_seq
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{
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\seq_get:NN \l_tmpb_seq \l__codehigh_b_tl
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\tl_set:Nx \l__codehigh_c_tl { \str_count:N \l__codehigh_b_tl }
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\bool_lazy_or:nnT
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{ \int_compare_p:nNn { \l__codehigh_item_count_int } = { -1 } }
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{
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\int_compare_p:nNn
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{ \l__codehigh_item_count_int } > { \l__codehigh_c_tl }
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}
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{
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\int_set:Nn \l__codehigh_item_count_int { \l__codehigh_c_tl }
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\tl_set_eq:NN \l__codehigh_regex_before_text_tl \l__codehigh_b_tl
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\tl_set_eq:NN \l__codehigh_regex_match_text_tl \l__codehigh_m_tl
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\tl_set_eq:Nc \l__codehigh_regex_match_name_tl { l__codehigh_ #1 _ ##1 _tl }
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}
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}
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}
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}
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}
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%% #1: style name, #2: text
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\cs_new_protected:Npn \__codehigh_typeset_text:nN #1 #2
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{
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\group_begin:
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\regex_replace_all:nnN { \^^M } { \c{par} } #2
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\regex_replace_all:nnN { \ } { \c{relax} \c{space} } #2
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\tl_use:c { l__codehigh_ style_ #1 _tl }
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#2
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\group_end:
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}
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\cs_generate_variant:Nn \__codehigh_typeset_text:nN { VN }
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\ExplSyntaxOff
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‎codehigh.tex

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% -*- coding: utf-8 -*-
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\documentclass{article}
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\usepackage[a4paper,margin=2cm]{geometry}
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\usepackage{codehigh}
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%\usepackage{arev}
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\usepackage{hyperref}
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\hypersetup{
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colorlinks=true,
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urlcolor=blue3,
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}
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\newcommand*{\myversion}{2021A}
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\newcommand*{\mydate}{\the\year/\mylpad\month/\mylpad\day\ (v\myversion)}
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\newcommand*{\mylpad}[1]{\ifnum#1<10 0\the#1\else\the#1\fi}
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\begin{document}
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\title{\textsf{\color{green3}Codehigh Package: Highlight Codes and Demos with LaTeX3}%
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\footnote{\url{https://github.com/lvjr/codehigh}}}
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\author{Jianrui Lyu ([email protected])}
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\date{\mydate}
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\maketitle
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\verb!Codehigh! package uses \verb!l3regex! package in \LaTeX3 Programming Layer
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to parse and highlight source codes and demos.
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In theory it would be more powerful than \verb!listings! package,
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and more easy to use than \verb!minted! package.
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At present, this package is in \underline{\color{red3}\textbf{experimental}} status.
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Don’t use it in important documents, unless you have time
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to update them for the newer versions of \verb!codehigh! package in the future.
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\bigskip
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\hrule
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\bigskip
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The following is typeset with \verb!verbatim! environment.
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\begin{verbatim}
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\begin{tabular}[b]{|lc|r|}
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\hline
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One & Two & Three \\ %[4pt]
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%\hline
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Four & Five & Six \\
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\hline%\hline\hline
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Seven & Eight & Nine \\ %* [1em]
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\hline
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\end{tabular}
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\end{verbatim}
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\bigskip
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\hrule
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\bigskip
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The following is typeset with \verb!codehigh! environment.
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\begin{codehigh}
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\begin{tabular}[b]{|lc|r|}
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\hline
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One & Two & Three \\ %[4pt]
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%\hline
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Four & Five & Six \\
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\hline%\hline\hline
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Seven & Eight & Nine \\ %* [1em]
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\hline
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\end{tabular}
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\end{codehigh}
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\bigskip
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\hrule
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\bigskip
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The following is typeset with \verb!demohigh! environment.
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\begin{demohigh}
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\begin{tabular}[b]{|lc|r|}
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\hline
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One & Two & Three \\ %[4pt]
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%\hline
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Four & Five & Six \\
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\hline%\hline\hline
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Seven & Eight & Nine \\ %* [1em]
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\hline
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\end{tabular}
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\end{demohigh}
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\bigskip
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\hrule
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\bigskip
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Please read the source file \verb!codehigh.tex! of this document for reference.
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\end{document}

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