vue hello world项目
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/**
* @param {string} value
* @returns {RegExp}
* */
/**
* @param {RegExp | string } re
* @returns {string}
*/
function source(re) {
if (!re) return null;
if (typeof re === "string") return re;
return re.source;
}
/**
* @param {RegExp | string } re
* @returns {string}
*/
function lookahead(re) {
return concat('(?=', re, ')');
}
/**
* @param {RegExp | string } re
* @returns {string}
*/
function optional(re) {
return concat('(', re, ')?');
}
/**
* @param {...(RegExp | string) } args
* @returns {string}
*/
function concat(...args) {
const joined = args.map((x) => source(x)).join("");
return joined;
}
/**
* Any of the passed expresssions may match
*
* Creates a huge this | this | that | that match
* @param {(RegExp | string)[] } args
* @returns {string}
*/
function either(...args) {
const joined = '(' + args.map((x) => source(x)).join("|") + ")";
return joined;
}
/*
Language: HTML, XML
Website: https://www.w3.org/XML/
Category: common
Audit: 2020
*/
/** @type LanguageFn */
function xml(hljs) {
// Element names can contain letters, digits, hyphens, underscores, and periods
const TAG_NAME_RE = concat(/[A-Z_]/, optional(/[A-Z0-9_.-]*:/), /[A-Z0-9_.-]*/);
const XML_IDENT_RE = /[A-Za-z0-9._:-]+/;
const XML_ENTITIES = {
className: 'symbol',
begin: /&[a-z]+;|&#[0-9]+;|&#x[a-f0-9]+;/
};
const XML_META_KEYWORDS = {
begin: /\s/,
contains: [
{
className: 'meta-keyword',
begin: /#?[a-z_][a-z1-9_-]+/,
illegal: /\n/
}
]
};
const XML_META_PAR_KEYWORDS = hljs.inherit(XML_META_KEYWORDS, {
begin: /\(/,
end: /\)/
});
const APOS_META_STRING_MODE = hljs.inherit(hljs.APOS_STRING_MODE, {
className: 'meta-string'
});
const QUOTE_META_STRING_MODE = hljs.inherit(hljs.QUOTE_STRING_MODE, {
className: 'meta-string'
});
const TAG_INTERNALS = {
endsWithParent: true,
illegal: /</,
relevance: 0,
contains: [
{
className: 'attr',
begin: XML_IDENT_RE,
relevance: 0
},
{
begin: /=\s*/,
relevance: 0,
contains: [
{
className: 'string',
endsParent: true,
variants: [
{
begin: /"/,
end: /"/,
contains: [ XML_ENTITIES ]
},
{
begin: /'/,
end: /'/,
contains: [ XML_ENTITIES ]
},
{
begin: /[^\s"'=<>`]+/
}
]
}
]
}
]
};
return {
name: 'HTML, XML',
aliases: [
'html',
'xhtml',
'rss',
'atom',
'xjb',
'xsd',
'xsl',
'plist',
'wsf',
'svg'
],
case_insensitive: true,
contains: [
{
className: 'meta',
begin: /<![a-z]/,
end: />/,
relevance: 10,
contains: [
XML_META_KEYWORDS,
QUOTE_META_STRING_MODE,
APOS_META_STRING_MODE,
XML_META_PAR_KEYWORDS,
{
begin: /\[/,
end: /\]/,
contains: [
{
className: 'meta',
begin: /<![a-z]/,
end: />/,
contains: [
XML_META_KEYWORDS,
XML_META_PAR_KEYWORDS,
QUOTE_META_STRING_MODE,
APOS_META_STRING_MODE
]
}
]
}
]
},
hljs.COMMENT(
/<!--/,
/-->/,
{
relevance: 10
}
),
{
begin: /<!\[CDATA\[/,
end: /\]\]>/,
relevance: 10
},
XML_ENTITIES,
{
className: 'meta',
begin: /<\?xml/,
end: /\?>/,
relevance: 10
},
{
className: 'tag',
/*
The lookahead pattern (?=...) ensures that 'begin' only matches
'<style' as a single word, followed by a whitespace or an
ending braket. The '$' is needed for the lexeme to be recognized
by hljs.subMode() that tests lexemes outside the stream.
*/
begin: /<style(?=\s|>)/,
end: />/,
keywords: {
name: 'style'
},
contains: [ TAG_INTERNALS ],
starts: {
end: /<\/style>/,
returnEnd: true,
subLanguage: [
'css',
'xml'
]
}
},
{
className: 'tag',
// See the comment in the <style tag about the lookahead pattern
begin: /<script(?=\s|>)/,
end: />/,
keywords: {
name: 'script'
},
contains: [ TAG_INTERNALS ],
starts: {
end: /<\/script>/,
returnEnd: true,
subLanguage: [
'javascript',
'handlebars',
'xml'
]
}
},
// we need this for now for jSX
{
className: 'tag',
begin: /<>|<\/>/
},
// open tag
{
className: 'tag',
begin: concat(
/</,
lookahead(concat(
TAG_NAME_RE,
// <tag/>
// <tag>
// <tag ...
either(/\/>/, />/, /\s/)
))
),
end: /\/?>/,
contains: [
{
className: 'name',
begin: TAG_NAME_RE,
relevance: 0,
starts: TAG_INTERNALS
}
]
},
// close tag
{
className: 'tag',
begin: concat(
/<\//,
lookahead(concat(
TAG_NAME_RE, />/
))
),
contains: [
{
className: 'name',
begin: TAG_NAME_RE,
relevance: 0
},
{
begin: />/,
relevance: 0,
endsParent: true
}
]
}
]
};
}
module.exports = xml;