vue hello world项目
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3 years ago
let OldValue = require('../old-value')
let Value = require('../value')
function regexp(name) {
return new RegExp(`(^|[\\s,(])(${name}($|[\\s),]))`, 'gi')
}
class Intrinsic extends Value {
regexp() {
if (!this.regexpCache) this.regexpCache = regexp(this.name)
return this.regexpCache
}
isStretch() {
return (
this.name === 'stretch' ||
this.name === 'fill' ||
this.name === 'fill-available'
)
}
replace(string, prefix) {
if (prefix === '-moz-' && this.isStretch()) {
return string.replace(this.regexp(), '$1-moz-available$3')
}
if (prefix === '-webkit-' && this.isStretch()) {
return string.replace(this.regexp(), '$1-webkit-fill-available$3')
}
return super.replace(string, prefix)
}
old(prefix) {
let prefixed = prefix + this.name
if (this.isStretch()) {
if (prefix === '-moz-') {
prefixed = '-moz-available'
} else if (prefix === '-webkit-') {
prefixed = '-webkit-fill-available'
}
}
return new OldValue(this.name, prefixed, prefixed, regexp(prefixed))
}
add(decl, prefix) {
if (decl.prop.includes('grid') && prefix !== '-webkit-') {
return undefined
}
return super.add(decl, prefix)
}
}
Intrinsic.names = [
'max-content',
'min-content',
'fit-content',
'fill',
'fill-available',
'stretch'
]
module.exports = Intrinsic