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let Prefixer = require('./prefixer')
let OldValue = require('./old-value')
let vendor = require('./vendor')
let utils = require('./utils')
class Value extends Prefixer {
/**
* Clone decl for each prefixed values
*/
static save(prefixes, decl) {
let prop = decl.prop
let result = []
for (let prefix in decl._autoprefixerValues) {
let value = decl._autoprefixerValues[prefix]
if (value === decl.value) {
continue
}
let item
let propPrefix = vendor.prefix(prop)
if (propPrefix === '-pie-') {
continue
}
if (propPrefix === prefix) {
item = decl.value = value
result.push(item)
continue
}
let prefixed = prefixes.prefixed(prop, prefix)
let rule = decl.parent
if (!rule.every(i => i.prop !== prefixed)) {
result.push(item)
continue
}
let trimmed = value.replace(/\s+/, ' ')
let already = rule.some(
i => i.prop === decl.prop && i.value.replace(/\s+/, ' ') === trimmed
)
if (already) {
result.push(item)
continue
}
let cloned = this.clone(decl, { value })
item = decl.parent.insertBefore(decl, cloned)
result.push(item)
}
return result
}
/**
* Is declaration need to be prefixed
*/
check(decl) {
let value = decl.value
if (!value.includes(this.name)) {
return false
}
return !!value.match(this.regexp())
}
/**
* Lazy regexp loading
*/
regexp() {
return this.regexpCache || (this.regexpCache = utils.regexp(this.name))
}
/**
* Add prefix to values in string
*/
replace(string, prefix) {
return string.replace(this.regexp(), `$1${prefix}$2`)
}
/**
* Get value with comments if it was not changed
*/
value(decl) {
if (decl.raws.value && decl.raws.value.value === decl.value) {
return decl.raws.value.raw
} else {
return decl.value
}
}
/**
* Save values with next prefixed token
*/
add(decl, prefix) {
if (!decl._autoprefixerValues) {
decl._autoprefixerValues = {}
}
let value = decl._autoprefixerValues[prefix] || this.value(decl)
let before
do {
before = value
value = this.replace(value, prefix)
if (value === false) return
} while (value !== before)
decl._autoprefixerValues[prefix] = value
}
/**
* Return function to fast find prefixed value
*/
old(prefix) {
return new OldValue(this.name, prefix + this.name)
}
}
module.exports = Value