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276 lines
7.9 KiB
276 lines
7.9 KiB
/**
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* @param {string} value
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* @returns {RegExp}
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* */
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/**
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* @param {RegExp | string } re
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* @returns {string}
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*/
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function source(re) {
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if (!re) return null;
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if (typeof re === "string") return re;
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return re.source;
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}
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/**
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* Any of the passed expresssions may match
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*
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* Creates a huge this | this | that | that match
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* @param {(RegExp | string)[] } args
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* @returns {string}
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*/
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function either(...args) {
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const joined = '(' + args.map((x) => source(x)).join("|") + ")";
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return joined;
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}
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/*
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Language: LaTeX
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Author: Benedikt Wilde <bwilde@posteo.de>
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Website: https://www.latex-project.org
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Category: markup
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*/
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/** @type LanguageFn */
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function latex(hljs) {
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const KNOWN_CONTROL_WORDS = either(...[
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'(?:NeedsTeXFormat|RequirePackage|GetIdInfo)',
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'Provides(?:Expl)?(?:Package|Class|File)',
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'(?:DeclareOption|ProcessOptions)',
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'(?:documentclass|usepackage|input|include)',
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'makeat(?:letter|other)',
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'ExplSyntax(?:On|Off)',
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'(?:new|renew|provide)?command',
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'(?:re)newenvironment',
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'(?:New|Renew|Provide|Declare)(?:Expandable)?DocumentCommand',
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'(?:New|Renew|Provide|Declare)DocumentEnvironment',
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'(?:(?:e|g|x)?def|let)',
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'(?:begin|end)',
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'(?:part|chapter|(?:sub){0,2}section|(?:sub)?paragraph)',
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'caption',
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'(?:label|(?:eq|page|name)?ref|(?:paren|foot|super)?cite)',
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'(?:alpha|beta|[Gg]amma|[Dd]elta|(?:var)?epsilon|zeta|eta|[Tt]heta|vartheta)',
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'(?:iota|(?:var)?kappa|[Ll]ambda|mu|nu|[Xx]i|[Pp]i|varpi|(?:var)rho)',
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'(?:[Ss]igma|varsigma|tau|[Uu]psilon|[Pp]hi|varphi|chi|[Pp]si|[Oo]mega)',
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'(?:frac|sum|prod|lim|infty|times|sqrt|leq|geq|left|right|middle|[bB]igg?)',
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'(?:[lr]angle|q?quad|[lcvdi]?dots|d?dot|hat|tilde|bar)'
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].map(word => word + '(?![a-zA-Z@:_])'));
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const L3_REGEX = new RegExp([
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// A function \module_function_name:signature or \__module_function_name:signature,
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// where both module and function_name need at least two characters and
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// function_name may contain single underscores.
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'(?:__)?[a-zA-Z]{2,}_[a-zA-Z](?:_?[a-zA-Z])+:[a-zA-Z]*',
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// A variable \scope_module_and_name_type or \scope__module_ane_name_type,
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// where scope is one of l, g or c, type needs at least two characters
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// and module_and_name may contain single underscores.
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'[lgc]__?[a-zA-Z](?:_?[a-zA-Z])*_[a-zA-Z]{2,}',
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// A quark \q_the_name or \q__the_name or
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// scan mark \s_the_name or \s__vthe_name,
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// where variable_name needs at least two characters and
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// may contain single underscores.
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'[qs]__?[a-zA-Z](?:_?[a-zA-Z])+',
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// Other LaTeX3 macro names that are not covered by the three rules above.
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'use(?:_i)?:[a-zA-Z]*',
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'(?:else|fi|or):',
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'(?:if|cs|exp):w',
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'(?:hbox|vbox):n',
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'::[a-zA-Z]_unbraced',
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'::[a-zA-Z:]'
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].map(pattern => pattern + '(?![a-zA-Z:_])').join('|'));
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const L2_VARIANTS = [
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{begin: /[a-zA-Z@]+/}, // control word
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{begin: /[^a-zA-Z@]?/} // control symbol
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];
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const DOUBLE_CARET_VARIANTS = [
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{begin: /\^{6}[0-9a-f]{6}/},
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{begin: /\^{5}[0-9a-f]{5}/},
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{begin: /\^{4}[0-9a-f]{4}/},
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{begin: /\^{3}[0-9a-f]{3}/},
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{begin: /\^{2}[0-9a-f]{2}/},
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{begin: /\^{2}[\u0000-\u007f]/}
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];
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const CONTROL_SEQUENCE = {
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className: 'keyword',
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begin: /\\/,
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relevance: 0,
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contains: [
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{
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endsParent: true,
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begin: KNOWN_CONTROL_WORDS
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},
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{
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endsParent: true,
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begin: L3_REGEX
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},
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{
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endsParent: true,
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variants: DOUBLE_CARET_VARIANTS
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},
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{
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endsParent: true,
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relevance: 0,
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variants: L2_VARIANTS
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}
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]
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};
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const MACRO_PARAM = {
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className: 'params',
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relevance: 0,
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begin: /#+\d?/
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};
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const DOUBLE_CARET_CHAR = {
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// relevance: 1
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variants: DOUBLE_CARET_VARIANTS
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};
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const SPECIAL_CATCODE = {
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className: 'built_in',
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relevance: 0,
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begin: /[$&^_]/
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};
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const MAGIC_COMMENT = {
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className: 'meta',
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begin: '% !TeX',
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end: '$',
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relevance: 10
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};
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const COMMENT = hljs.COMMENT(
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'%',
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'$',
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{
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relevance: 0
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}
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);
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const EVERYTHING_BUT_VERBATIM = [
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CONTROL_SEQUENCE,
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MACRO_PARAM,
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DOUBLE_CARET_CHAR,
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SPECIAL_CATCODE,
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MAGIC_COMMENT,
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COMMENT
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];
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const BRACE_GROUP_NO_VERBATIM = {
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begin: /\{/, end: /\}/,
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relevance: 0,
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contains: ['self', ...EVERYTHING_BUT_VERBATIM]
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};
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const ARGUMENT_BRACES = hljs.inherit(
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BRACE_GROUP_NO_VERBATIM,
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{
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relevance: 0,
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endsParent: true,
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contains: [BRACE_GROUP_NO_VERBATIM, ...EVERYTHING_BUT_VERBATIM]
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}
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);
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const ARGUMENT_BRACKETS = {
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begin: /\[/,
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end: /\]/,
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endsParent: true,
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relevance: 0,
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contains: [BRACE_GROUP_NO_VERBATIM, ...EVERYTHING_BUT_VERBATIM]
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};
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const SPACE_GOBBLER = {
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begin: /\s+/,
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relevance: 0
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};
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const ARGUMENT_M = [ARGUMENT_BRACES];
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const ARGUMENT_O = [ARGUMENT_BRACKETS];
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const ARGUMENT_AND_THEN = function(arg, starts_mode) {
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return {
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contains: [SPACE_GOBBLER],
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starts: {
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relevance: 0,
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contains: arg,
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starts: starts_mode
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}
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};
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};
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const CSNAME = function(csname, starts_mode) {
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return {
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begin: '\\\\' + csname + '(?![a-zA-Z@:_])',
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keywords: {$pattern: /\\[a-zA-Z]+/, keyword: '\\' + csname},
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relevance: 0,
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contains: [SPACE_GOBBLER],
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starts: starts_mode
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};
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};
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const BEGIN_ENV = function(envname, starts_mode) {
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return hljs.inherit(
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{
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begin: '\\\\begin(?=\\s*\\r?\\n?\\s*\\{' + envname + '\\})',
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keywords: {$pattern: /\\[a-zA-Z]+/, keyword: '\\begin'},
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relevance: 0,
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},
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ARGUMENT_AND_THEN(ARGUMENT_M, starts_mode)
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);
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};
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const VERBATIM_DELIMITED_EQUAL = (innerName = "string") => {
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return hljs.END_SAME_AS_BEGIN({
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className: innerName,
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begin: /(.|\r?\n)/,
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end: /(.|\r?\n)/,
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excludeBegin: true,
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excludeEnd: true,
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endsParent: true
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});
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};
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const VERBATIM_DELIMITED_ENV = function(envname) {
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return {
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className: 'string',
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end: '(?=\\\\end\\{' + envname + '\\})'
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};
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};
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const VERBATIM_DELIMITED_BRACES = (innerName = "string") => {
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return {
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relevance: 0,
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begin: /\{/,
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starts: {
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endsParent: true,
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contains: [
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{
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className: innerName,
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end: /(?=\})/,
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endsParent:true,
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contains: [
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{
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begin: /\{/,
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end: /\}/,
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relevance: 0,
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contains: ["self"]
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}
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],
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}
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]
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}
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};
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};
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const VERBATIM = [
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...['verb', 'lstinline'].map(csname => CSNAME(csname, {contains: [VERBATIM_DELIMITED_EQUAL()]})),
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CSNAME('mint', ARGUMENT_AND_THEN(ARGUMENT_M, {contains: [VERBATIM_DELIMITED_EQUAL()]})),
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CSNAME('mintinline', ARGUMENT_AND_THEN(ARGUMENT_M, {contains: [VERBATIM_DELIMITED_BRACES(), VERBATIM_DELIMITED_EQUAL()]})),
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CSNAME('url', {contains: [VERBATIM_DELIMITED_BRACES("link"), VERBATIM_DELIMITED_BRACES("link")]}),
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CSNAME('hyperref', {contains: [VERBATIM_DELIMITED_BRACES("link")]}),
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CSNAME('href', ARGUMENT_AND_THEN(ARGUMENT_O, {contains: [VERBATIM_DELIMITED_BRACES("link")]})),
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...[].concat(...['', '\\*'].map(suffix => [
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BEGIN_ENV('verbatim' + suffix, VERBATIM_DELIMITED_ENV('verbatim' + suffix)),
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BEGIN_ENV('filecontents' + suffix, ARGUMENT_AND_THEN(ARGUMENT_M, VERBATIM_DELIMITED_ENV('filecontents' + suffix))),
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...['', 'B', 'L'].map(prefix =>
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BEGIN_ENV(prefix + 'Verbatim' + suffix, ARGUMENT_AND_THEN(ARGUMENT_O, VERBATIM_DELIMITED_ENV(prefix + 'Verbatim' + suffix)))
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)
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])),
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BEGIN_ENV('minted', ARGUMENT_AND_THEN(ARGUMENT_O, ARGUMENT_AND_THEN(ARGUMENT_M, VERBATIM_DELIMITED_ENV('minted')))),
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];
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return {
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name: 'LaTeX',
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aliases: ['TeX'],
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contains: [
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...VERBATIM,
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...EVERYTHING_BUT_VERBATIM
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]
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};
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}
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module.exports = latex;
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