98 lines
2.3 KiB
JavaScript
Vendored
98 lines
2.3 KiB
JavaScript
Vendored
let Fraction = require('fraction.js')
|
|
|
|
let Prefixer = require('./prefixer')
|
|
let utils = require('./utils')
|
|
|
|
const REGEXP = /(min|max)-resolution\s*:\s*\d*\.?\d+(dppx|dpcm|dpi|x)/gi
|
|
const SPLIT = /(min|max)-resolution(\s*:\s*)(\d*\.?\d+)(dppx|dpcm|dpi|x)/i
|
|
|
|
class Resolution extends Prefixer {
|
|
/**
|
|
* Return prefixed query name
|
|
*/
|
|
prefixName (prefix, name) {
|
|
if (prefix === '-moz-') {
|
|
return name + '--moz-device-pixel-ratio'
|
|
} else {
|
|
return prefix + name + '-device-pixel-ratio'
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return prefixed query
|
|
*/
|
|
prefixQuery (prefix, name, colon, value, units) {
|
|
value = new Fraction(value)
|
|
|
|
// 1dpcm = 2.54dpi
|
|
// 1dppx = 96dpi
|
|
if (units === 'dpi') {
|
|
value = value.div(96)
|
|
} else if (units === 'dpcm') {
|
|
value = value.mul(2.54).div(96)
|
|
}
|
|
value = value.simplify()
|
|
|
|
if (prefix === '-o-') {
|
|
value = value.n + '/' + value.d
|
|
}
|
|
return this.prefixName(prefix, name) + colon + value
|
|
}
|
|
|
|
/**
|
|
* Remove prefixed queries
|
|
*/
|
|
clean (rule) {
|
|
if (!this.bad) {
|
|
this.bad = []
|
|
for (let prefix of this.prefixes) {
|
|
this.bad.push(this.prefixName(prefix, 'min'))
|
|
this.bad.push(this.prefixName(prefix, 'max'))
|
|
}
|
|
}
|
|
|
|
rule.params = utils.editList(rule.params, queries => {
|
|
return queries.filter(query => this.bad.every(i => !query.includes(i)))
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Add prefixed queries
|
|
*/
|
|
process (rule) {
|
|
let parent = this.parentPrefix(rule)
|
|
let prefixes = parent ? [parent] : this.prefixes
|
|
|
|
rule.params = utils.editList(rule.params, (origin, prefixed) => {
|
|
for (let query of origin) {
|
|
if (
|
|
!query.includes('min-resolution') &&
|
|
!query.includes('max-resolution')
|
|
) {
|
|
prefixed.push(query)
|
|
continue
|
|
}
|
|
|
|
for (let prefix of prefixes) {
|
|
let processed = query.replace(REGEXP, str => {
|
|
let parts = str.match(SPLIT)
|
|
return this.prefixQuery(
|
|
prefix,
|
|
parts[1],
|
|
parts[2],
|
|
parts[3],
|
|
parts[4]
|
|
)
|
|
})
|
|
prefixed.push(processed)
|
|
}
|
|
prefixed.push(query)
|
|
}
|
|
|
|
return utils.uniq(prefixed)
|
|
})
|
|
}
|
|
}
|
|
|
|
module.exports = Resolution
|