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Mini Shell
Mini Shell
/*
Language: Markdown
Requires: xml.js
Author: John Crepezzi <john.crepezzi@gmail.com>
Website: https://daringfireball.net/projects/markdown/
Category: common, markup
*/
function markdown(hljs) {
const regex = hljs.regex;
const INLINE_HTML = {
begin: /<\/?[A-Za-z_]/,
end: '>',
subLanguage: 'xml',
relevance: 0
};
const HORIZONTAL_RULE = {
begin: '^[-\\*]{3,}',
end: '$'
};
const CODE = {
className: 'code',
variants: [
// TODO: fix to allow these to work with sublanguage also
{ begin: '(`{3,})[^`](.|\\n)*?\\1`*[ ]*' },
{ begin: '(~{3,})[^~](.|\\n)*?\\1~*[ ]*' },
// needed to allow markdown as a sublanguage to work
{
begin: '```',
end: '```+[ ]*$'
},
{
begin: '~~~',
end: '~~~+[ ]*$'
},
{ begin: '`.+?`' },
{
begin: '(?=^( {4}|\\t))',
// use contains to gobble up multiple lines to allow the block to be whatever size
// but only have a single open/close tag vs one per line
contains: [
{
begin: '^( {4}|\\t)',
end: '(\\n)$'
}
],
relevance: 0
}
]
};
const LIST = {
className: 'bullet',
begin: '^[ \t]*([*+-]|(\\d+\\.))(?=\\s+)',
end: '\\s+',
excludeEnd: true
};
const LINK_REFERENCE = {
begin: /^\[[^\n]+\]:/,
returnBegin: true,
contains: [
{
className: 'symbol',
begin: /\[/,
end: /\]/,
excludeBegin: true,
excludeEnd: true
},
{
className: 'link',
begin: /:\s*/,
end: /$/,
excludeBegin: true
}
]
};
const URL_SCHEME = /[A-Za-z][A-Za-z0-9+.-]*/;
const LINK = {
variants: [
// too much like nested array access in so many languages
// to have any real relevance
{
begin: /\[.+?\]\[.*?\]/,
relevance: 0
},
// popular internet URLs
{
begin: /\[.+?\]\(((data|javascript|mailto):|(?:http|ftp)s?:\/\/).*?\)/,
relevance: 2
},
{
begin: regex.concat(/\[.+?\]\(/, URL_SCHEME, /:\/\/.*?\)/),
relevance: 2
},
// relative urls
{
begin: /\[.+?\]\([./?&#].*?\)/,
relevance: 1
},
// whatever else, lower relevance (might not be a link at all)
{
begin: /\[.*?\]\(.*?\)/,
relevance: 0
}
],
returnBegin: true,
contains: [
{
// empty strings for alt or link text
match: /\[(?=\])/ },
{
className: 'string',
relevance: 0,
begin: '\\[',
end: '\\]',
excludeBegin: true,
returnEnd: true
},
{
className: 'link',
relevance: 0,
begin: '\\]\\(',
end: '\\)',
excludeBegin: true,
excludeEnd: true
},
{
className: 'symbol',
relevance: 0,
begin: '\\]\\[',
end: '\\]',
excludeBegin: true,
excludeEnd: true
}
]
};
const BOLD = {
className: 'strong',
contains: [], // defined later
variants: [
{
begin: /_{2}(?!\s)/,
end: /_{2}/
},
{
begin: /\*{2}(?!\s)/,
end: /\*{2}/
}
]
};
const ITALIC = {
className: 'emphasis',
contains: [], // defined later
variants: [
{
begin: /\*(?![*\s])/,
end: /\*/
},
{
begin: /_(?![_\s])/,
end: /_/,
relevance: 0
}
]
};
// 3 level deep nesting is not allowed because it would create confusion
// in cases like `***testing***` because where we don't know if the last
// `***` is starting a new bold/italic or finishing the last one
const BOLD_WITHOUT_ITALIC = hljs.inherit(BOLD, { contains: [] });
const ITALIC_WITHOUT_BOLD = hljs.inherit(ITALIC, { contains: [] });
BOLD.contains.push(ITALIC_WITHOUT_BOLD);
ITALIC.contains.push(BOLD_WITHOUT_ITALIC);
let CONTAINABLE = [
INLINE_HTML,
LINK
];
[
BOLD,
ITALIC,
BOLD_WITHOUT_ITALIC,
ITALIC_WITHOUT_BOLD
].forEach(m => {
m.contains = m.contains.concat(CONTAINABLE);
});
CONTAINABLE = CONTAINABLE.concat(BOLD, ITALIC);
const HEADER = {
className: 'section',
variants: [
{
begin: '^#{1,6}',
end: '$',
contains: CONTAINABLE
},
{
begin: '(?=^.+?\\n[=-]{2,}$)',
contains: [
{ begin: '^[=-]*$' },
{
begin: '^',
end: "\\n",
contains: CONTAINABLE
}
]
}
]
};
const BLOCKQUOTE = {
className: 'quote',
begin: '^>\\s+',
contains: CONTAINABLE,
end: '$'
};
return {
name: 'Markdown',
aliases: [
'md',
'mkdown',
'mkd'
],
contains: [
HEADER,
INLINE_HTML,
LIST,
BOLD,
ITALIC,
BLOCKQUOTE,
CODE,
HORIZONTAL_RULE,
LINK,
LINK_REFERENCE
]
};
}
module.exports = markdown;
Zerion Mini Shell 1.0