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let { list } = require('postcss')
|
|
|
|
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|
/**
|
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|
* Throw special error, to tell beniary,
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|
* that this error is from Autoprefixer.
|
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|
*/
|
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|
module.exports.error = function (text) {
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|
let err = new Error(text)
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|
err.autoprefixer = true
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|
throw err
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|
}
|
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|
|
|
/**
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|
* Return array, that doesn’t contain duplicates.
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|
*/
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|
module.exports.uniq = function (array) {
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|
return [...new Set(array)]
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|
}
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|
|
|
/**
|
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|
* Return "-webkit-" on "-webkit- old"
|
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|
*/
|
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|
module.exports.removeNote = function (string) {
|
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|
if (!string.includes(' ')) {
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|
return string
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|
|
}
|
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|
|
|
return string.split(' ')[0]
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|
}
|
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|
|
|
|
/**
|
|
|
* Escape RegExp symbols
|
|
|
*/
|
|
|
module.exports.escapeRegexp = function (string) {
|
|
|
return string.replace(/[$()*+-.?[\\\]^{|}]/g, '\\$&')
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Return regexp to check, that CSS string contain word
|
|
|
*/
|
|
|
module.exports.regexp = function (word, escape = true) {
|
|
|
if (escape) {
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|
|
word = this.escapeRegexp(word)
|
|
|
}
|
|
|
return new RegExp(`(^|[\\s,(])(${word}($|[\\s(,]))`, 'gi')
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|
|
}
|
|
|
|
|
|
/**
|
|
|
* Change comma list
|
|
|
*/
|
|
|
module.exports.editList = function (value, callback) {
|
|
|
let origin = list.comma(value)
|
|
|
let changed = callback(origin, [])
|
|
|
|
|
|
if (origin === changed) {
|
|
|
return value
|
|
|
}
|
|
|
|
|
|
let join = value.match(/,\s*/)
|
|
|
join = join ? join[0] : ', '
|
|
|
return changed.join(join)
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Split the selector into parts.
|
|
|
* It returns 3 level deep array because selectors can be comma
|
|
|
* separated (1), space separated (2), and combined (3)
|
|
|
* @param {String} selector selector string
|
|
|
* @return {Array<Array<Array>>} 3 level deep array of split selector
|
|
|
* @see utils.test.js for examples
|
|
|
*/
|
|
|
module.exports.splitSelector = function (selector) {
|
|
|
return list.comma(selector).map(i => {
|
|
|
return list.space(i).map(k => {
|
|
|
return k.split(/(?=\.|#)/g)
|
|
|
})
|
|
|
})
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Return true if a given value only contains numbers.
|
|
|
* @param {*} value
|
|
|
* @returns {boolean}
|
|
|
*/
|
|
|
module.exports.isPureNumber = function (value) {
|
|
|
if (typeof value === 'number') {
|
|
|
return true
|
|
|
}
|
|
|
if (typeof value === 'string') {
|
|
|
return /^[0-9]+$/.test(value)
|
|
|
}
|
|
|
return false
|
|
|
}
|
