prism-less.js
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/* FIXME :
:extend() is not handled specifically : its highlighting is buggy.
Mixin usage must be inside a ruleset to be highlighted.
At-rules (e.g. import) containing interpolations are buggy.
Detached rulesets are highlighted as at-rules.
A comment before a mixin usage prevents the latter to be properly highlighted.
*/
Prism.languages.less = Prism.languages.extend('css', {
'comment': [
/\/\*[\w\W]*?\*\//,
{
pattern: /(^|[^\\])\/\/.*/,
lookbehind: true
}
],
'atrule': {
pattern: /@[\w-]+?(?:\([^{}]+\)|[^(){};])*?(?=\s*\{)/i,
inside: {
'punctuation': /[:()]/
}
},
// selectors and mixins are considered the same
'selector': {
pattern: /(?:@\{[\w-]+\}|[^{};\s@])(?:@\{[\w-]+\}|\([^{}]*\)|[^{};@])*?(?=\s*\{)/,
inside: {
// mixin parameters
'variable': /@+[\w-]+/
}
},
'property': /(?:@\{[\w-]+\}|[\w-])+(?:\+_?)?(?=\s*:)/i,
'punctuation': /[{}();:,]/,
'operator': /[+\-*\/]/
});
// Invert function and punctuation positions
Prism.languages.insertBefore('less', 'punctuation', {
'function': Prism.languages.less.function
});
Prism.languages.insertBefore('less', 'property', {
'variable': [
// Variable declaration (the colon must be consumed!)
{
pattern: /@[\w-]+\s*:/,
inside: {
"punctuation": /:/
}
},
// Variable usage
/@@?[\w-]+/
],
'mixin-usage': {
pattern: /([{;]\s*)[.#](?!\d)[\w-]+.*?(?=[(;])/,
lookbehind: true,
alias: 'function'
}
});