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