bc518174
 王天杨
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import isBrowser from '#is-browser'
import { RegisteredCache, EmotionCache, SerializedStyles } from './types'
export function getRegisteredStyles(
registered: RegisteredCache,
registeredStyles: string[],
classNames: string
): string {
let rawClassName = ''
classNames.split(' ').forEach(className => {
if (registered[className] !== undefined) {
registeredStyles.push(`${registered[className]};`)
} else if (className) {
rawClassName += `${className} `
}
})
return rawClassName
}
export const registerStyles = (
cache: EmotionCache,
serialized: SerializedStyles,
isStringTag: boolean
): void => {
let className = `${cache.key}-${serialized.name}`
if (
// we only need to add the styles to the registered cache if the
// class name could be used further down
// the tree but if it's a string tag, we know it won't
// so we don't have to add it to registered cache.
// this improves memory usage since we can avoid storing the whole style string
(isStringTag === false ||
// we need to always store it if we're in compat mode and
// in node since emotion-server relies on whether a style is in
// the registered cache to know whether a style is global or not
// also, note that this check will be dead code eliminated in the browser
(isBrowser === false && cache.compat !== undefined)) &&
cache.registered[className] === undefined
) {
cache.registered[className] = serialized.styles
}
}
export const insertStyles = (
cache: EmotionCache,
serialized: SerializedStyles,
isStringTag: boolean
) => {
registerStyles(cache, serialized, isStringTag)
let className = `${cache.key}-${serialized.name}`
if (cache.inserted[serialized.name] === undefined) {
let stylesForSSR = ''
let current: SerializedStyles | undefined = serialized
do {
let maybeStyles = cache.insert(
serialized === current ? `.${className}` : '',
current,
cache.sheet,
true
)
if (!isBrowser && maybeStyles !== undefined) {
stylesForSSR += maybeStyles
}
current = current.next
} while (current !== undefined)
if (!isBrowser && stylesForSSR.length !== 0) {
return stylesForSSR
}
}
}
export * from './types'
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