/
pluginUtils.js
221 lines (192 loc) · 5.09 KB
/
pluginUtils.js
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import selectorParser from 'postcss-selector-parser'
import postcss from 'postcss'
import createColor from 'color'
import escapeCommas from './escapeCommas'
export function updateAllClasses(selectors, updateClass) {
let parser = selectorParser((selectors) => {
selectors.walkClasses((sel) => {
let updatedClass = updateClass(sel.value, {
withPseudo(className, pseudo) {
sel.parent.insertAfter(sel, selectorParser.pseudo({ value: `:${pseudo}` }))
return className
},
})
sel.value = updatedClass
if (sel.raws && sel.raws.value) {
sel.raws.value = escapeCommas(sel.raws.value)
}
})
})
let result = parser.processSync(selectors)
return result
}
export function updateLastClasses(selectors, updateClass) {
let parser = selectorParser((selectors) => {
selectors.each((sel) => {
let lastClass = sel.filter(({ type }) => type === 'class').pop()
if (lastClass === undefined) {
return
}
let updatedClass = updateClass(lastClass.value, {
withPseudo(className, pseudo) {
lastClass.parent.insertAfter(lastClass, selectorParser.pseudo({ value: `:${pseudo}` }))
return className
},
})
lastClass.value = updatedClass
if (lastClass.raws && lastClass.raws.value) {
lastClass.raws.value = escapeCommas(lastClass.raws.value)
}
})
})
let result = parser.processSync(selectors)
return result
}
export function transformAllSelectors(transformSelector, wrap = null) {
return ({ container }) => {
container.walkRules((rule) => {
let transformed = rule.selector.split(',').map(transformSelector).join(',')
rule.selector = transformed
return rule
})
if (wrap) {
let wrapper = wrap()
wrapper.append(container.nodes)
container.append(wrapper)
}
}
}
export function transformAllClasses(transformClass) {
return ({ container }) => {
container.walkRules((rule) => {
let selector = rule.selector
let variantSelector = updateAllClasses(selector, transformClass)
rule.selector = variantSelector
return rule
})
}
}
export function transformLastClasses(transformClass, wrap = null) {
return ({ container }) => {
container.walkRules((rule) => {
let selector = rule.selector
let variantSelector = updateLastClasses(selector, transformClass)
rule.selector = variantSelector
return rule
})
if (wrap) {
let wrapper = wrap()
wrapper.append(container.nodes)
container.append(wrapper)
}
}
}
export function asValue(
modifier,
lookup = {},
{ validate = () => true, transform = (v) => v } = {}
) {
let value = lookup[modifier]
if (value !== undefined) {
return value
}
if (modifier[0] !== '[' || modifier[modifier.length - 1] !== ']') {
return undefined
}
value = modifier.slice(1, -1)
if (!validate(value)) {
return undefined
}
// add spaces around operators inside calc() that do not follow an operator or (
return transform(value).replace(
/(-?\d*\.?\d(?!\b-.+[,)](?![^+\-/*])\D)(?:%|[a-z]+)?|\))([+\-/*])/g,
'$1 $2 '
)
}
export function asUnit(modifier, units, lookup = {}) {
return asValue(modifier, lookup, {
validate: (value) => {
let unitsPattern = `(?:${units.join('|')})`
return (
new RegExp(`${unitsPattern}$`).test(value) ||
new RegExp(`^calc\\(.+?${unitsPattern}`).test(value)
)
},
transform: (value) => {
return value
},
})
}
export function asList(modifier, lookup = {}) {
return asValue(modifier, lookup, {
transform: (value) => {
return postcss.list
.comma(value)
.map((v) => v.replace(/,/g, ', '))
.join(' ')
},
})
}
export function asColor(modifier, lookup = {}) {
return asValue(modifier, lookup, {
validate: (value) => {
try {
createColor(value)
return true
} catch (e) {
return false
}
},
})
}
export function asAngle(modifier, lookup = {}) {
return asUnit(modifier, ['deg', 'grad', 'rad', 'turn'], lookup)
}
export function asLength(modifier, lookup = {}) {
return asUnit(
modifier,
[
'cm',
'mm',
'Q',
'in',
'pc',
'pt',
'px',
'em',
'ex',
'ch',
'rem',
'lh',
'vw',
'vh',
'vmin',
'vmax',
'%',
],
lookup
)
}
export function asLookupValue(modifier, lookup = {}) {
return lookup[modifier]
}
let typeMap = {
any: asValue,
list: asList,
color: asColor,
angle: asAngle,
length: asLength,
lookup: asLookupValue,
}
function splitAtFirst(input, delim) {
return (([first, ...rest]) => [first, rest.join(delim)])(input.split(delim))
}
export function coerceValue(type, modifier, values) {
if (modifier.startsWith('[') && modifier.endsWith(']')) {
let [explicitType, value] = splitAtFirst(modifier.slice(1, -1), ':')
if (value.length > 0 && Object.keys(typeMap).includes(explicitType)) {
return [asValue(`[${value}]`, values), explicitType]
}
}
return [typeMap[type](modifier, values), type]
}