highlight-ts
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Highlight.JS in TypeScript (and ES6).
113 lines • 4.81 kB
JavaScript
;
/*
Language: Less
Author: Max Mikhailov <seven.phases.max@gmail.com>
Category: css
*/
Object.defineProperty(exports, "__esModule", { value: true });
var common_1 = require("../common");
var IDENT_RE = '[\\w-]+'; // yes, Less identifiers may begin with a digit
var INTERP_IDENT_RE = '(' + IDENT_RE + '|@{' + IDENT_RE + '})';
/* Generic Modes */
var RULES = [], VALUE = []; // forward def. for recursive modes
var STRING_MODE = function (c) { return ({
// Less strings are not multiline (also include '~' for more consistent coloring of "escaped" strings)
className: 'string', begin: '~?' + c + '.*?' + c
}); };
var IDENT_MODE = function (className, begin, relevance) {
return ({ className: className, begin: begin, relevance: relevance });
};
var PARENS_MODE = {
// used only to properly balance nested parens inside mixin call, def. arg list
begin: '\\(', end: '\\)', contains: VALUE, relevance: 0
};
// generic Less highlighter (used almost everywhere except selectors):
VALUE.push(common_1.C_LINE_COMMENT_MODE, common_1.C_BLOCK_COMMENT_MODE, STRING_MODE("'"), STRING_MODE('"'), common_1.CSS_NUMBER_MODE, // fixme: it does not include dot for numbers like .5em :(
{
begin: '(url|data-uri)\\(',
starts: { className: 'string', end: '[\\)\\n]', excludeEnd: true }
}, IDENT_MODE('number', '#[0-9A-Fa-f]+\\b'), PARENS_MODE, IDENT_MODE('variable', '@@?' + IDENT_RE, 10), IDENT_MODE('variable', '@{' + IDENT_RE + '}'), IDENT_MODE('built_in', '~?`[^`]*?`'), // inline javascript (or whatever host language) *multiline* string
{
className: 'attribute', begin: IDENT_RE + '\\s*:', end: ':', returnBegin: true, excludeEnd: true
}, {
className: 'meta',
begin: '!important'
});
var VALUE_WITH_RULESETS = VALUE.concat({
begin: '{', end: '}', contains: RULES
});
var MIXIN_GUARD_MODE = {
beginKeywords: 'when', endsWithParent: true,
contains: [{ beginKeywords: 'and not' }].concat(VALUE) // using this form to override VALUE’s 'function' match
};
/* Rule-Level Modes */
var RULE_MODE = {
begin: INTERP_IDENT_RE + '\\s*:', returnBegin: true, end: '[;}]',
relevance: 0,
contains: [
{
className: 'attribute',
begin: INTERP_IDENT_RE, end: ':', excludeEnd: true,
starts: {
endsWithParent: true, illegal: '[<=$]',
relevance: 0,
contains: VALUE
}
}
]
};
var AT_RULE_MODE = {
className: 'keyword',
begin: '@(import|media|charset|font-face|(-[a-z]+-)?keyframes|supports|document|namespace|page|viewport|host)\\b',
starts: { end: '[;{}]', returnEnd: true, contains: VALUE, relevance: 0 }
};
// variable definitions and calls
var VAR_RULE_MODE = {
className: 'variable',
variants: [
// using more strict pattern for higher relevance to increase chances of Less detection.
// this is *the only* Less specific statement used in most of the sources, so...
// (we’ll still often loose to the css-parser unless there's '//' comment,
// simply because 1 variable just can't beat 99 properties :)
{ begin: '@' + IDENT_RE + '\\s*:', relevance: 15 },
{ begin: '@' + IDENT_RE }
],
starts: { end: '[;}]', returnEnd: true, contains: VALUE_WITH_RULESETS }
};
var SELECTOR_MODE = {
// first parse unambiguous selectors (i.e. those not starting with tag)
// then fall into the scary lookahead-discriminator variant.
// this mode also handles mixin definitions and calls
variants: [{
begin: '[\\.#:&\\[>]', end: '[;{}]' // mixin calls end with ';'
}, {
begin: INTERP_IDENT_RE, end: '{'
}],
returnBegin: true,
returnEnd: true,
illegal: '[<=\'$"]',
relevance: 0,
contains: [
common_1.C_LINE_COMMENT_MODE,
common_1.C_BLOCK_COMMENT_MODE,
MIXIN_GUARD_MODE,
IDENT_MODE('keyword', 'all\\b'),
IDENT_MODE('variable', '@{' + IDENT_RE + '}'),
IDENT_MODE('selector-tag', INTERP_IDENT_RE + '%?', 0),
IDENT_MODE('selector-id', '#' + INTERP_IDENT_RE),
IDENT_MODE('selector-class', '\\.' + INTERP_IDENT_RE, 0),
IDENT_MODE('selector-tag', '&', 0),
{ className: 'selector-attr', begin: '\\[', end: '\\]' },
{ className: 'selector-pseudo', begin: /:(:)?[a-zA-Z0-9\_\-\+\(\)"'.]+/ },
{ begin: '\\(', end: '\\)', contains: VALUE_WITH_RULESETS },
{ begin: '!important' } // eat !important after mixin call or it will be colored as tag
]
};
RULES.push(common_1.C_LINE_COMMENT_MODE, common_1.C_BLOCK_COMMENT_MODE, AT_RULE_MODE, VAR_RULE_MODE, RULE_MODE, SELECTOR_MODE);
exports.Less = {
name: 'less',
case_insensitive: true,
illegal: '[=>\'/<($"]',
contains: RULES
};
//# sourceMappingURL=less.js.map