145 lines
3.1 KiB
JavaScript
145 lines
3.1 KiB
JavaScript
let Browsers = require('./browsers')
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let vendor = require('./vendor')
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let utils = require('./utils')
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/**
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* Recursively clone objects
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*/
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function clone(obj, parent) {
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let cloned = new obj.constructor()
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for (let i of Object.keys(obj || {})) {
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let value = obj[i]
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if (i === 'parent' && typeof value === 'object') {
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if (parent) {
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cloned[i] = parent
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}
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} else if (i === 'source' || i === null) {
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cloned[i] = value
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} else if (Array.isArray(value)) {
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cloned[i] = value.map(x => clone(x, cloned))
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} else if (
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i !== '_autoprefixerPrefix' &&
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i !== '_autoprefixerValues' &&
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i !== 'proxyCache'
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) {
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if (typeof value === 'object' && value !== null) {
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value = clone(value, cloned)
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}
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cloned[i] = value
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}
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}
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return cloned
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}
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class Prefixer {
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constructor(name, prefixes, all) {
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this.prefixes = prefixes
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this.name = name
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this.all = all
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}
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/**
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* Clone node and clean autprefixer custom caches
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*/
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static clone(node, overrides) {
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let cloned = clone(node)
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for (let name in overrides) {
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cloned[name] = overrides[name]
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}
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return cloned
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}
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/**
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* Add hack to selected names
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*/
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static hack(klass) {
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if (!this.hacks) {
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this.hacks = {}
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}
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return klass.names.map(name => {
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this.hacks[name] = klass
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return this.hacks[name]
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})
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}
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/**
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* Load hacks for some names
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*/
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static load(name, prefixes, all) {
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let Klass = this.hacks && this.hacks[name]
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if (Klass) {
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return new Klass(name, prefixes, all)
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} else {
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return new this(name, prefixes, all)
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}
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}
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/**
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* Shortcut for Prefixer.clone
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*/
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clone(node, overrides) {
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return Prefixer.clone(node, overrides)
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}
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/**
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* Find prefix in node parents
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*/
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parentPrefix(node) {
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let prefix
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if (typeof node._autoprefixerPrefix !== 'undefined') {
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prefix = node._autoprefixerPrefix
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} else if (node.type === 'decl' && node.prop[0] === '-') {
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prefix = vendor.prefix(node.prop)
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} else if (node.type === 'root') {
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prefix = false
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} else if (
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node.type === 'rule' &&
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node.selector.includes(':-') &&
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/:(-\w+-)/.test(node.selector)
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) {
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prefix = node.selector.match(/:(-\w+-)/)[1]
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} else if (node.type === 'atrule' && node.name[0] === '-') {
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prefix = vendor.prefix(node.name)
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} else {
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prefix = this.parentPrefix(node.parent)
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}
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if (!Browsers.prefixes().includes(prefix)) {
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prefix = false
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}
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node._autoprefixerPrefix = prefix
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return node._autoprefixerPrefix
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}
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/**
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* Clone node with prefixes
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*/
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process(node, result) {
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if (!this.check(node)) {
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return undefined
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}
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let parent = this.parentPrefix(node)
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let prefixes = this.prefixes.filter(
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prefix => !parent || parent === utils.removeNote(prefix)
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)
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let added = []
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for (let prefix of prefixes) {
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if (this.add(node, prefix, added.concat([prefix]), result)) {
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added.push(prefix)
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}
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}
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return added
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}
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}
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module.exports = Prefixer
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