0.2.0 - Mid migration

web/node_modules/@emotion/utils/src/index.js

@@ -0,0 +1,66 @@
+// @flow
+import type { RegisteredCache, EmotionCache, SerializedStyles } from './types'
+
+let isBrowser = typeof document !== 'undefined'
+
+export function getRegisteredStyles(
+  registered: RegisteredCache,
+  registeredStyles: string[],
+  classNames: string
+) {
+  let rawClassName = ''
+
+  classNames.split(' ').forEach(className => {
+    if (registered[className] !== undefined) {
+      registeredStyles.push(registered[className])
+    } else {
+      rawClassName += `${className} `
+    }
+  })
+  return rawClassName
+}
+
+export const insertStyles = (
+  cache: EmotionCache,
+  serialized: SerializedStyles,
+  isStringTag: boolean
+) => {
+  let className = `${cache.key}-${serialized.name}`
+  if (
+    // we only need to add the styles to the registered cache if the
+    // class name could be used further down
+    // the tree but if it's a string tag, we know it won't
+    // so we don't have to add it to registered cache.
+    // this improves memory usage since we can avoid storing the whole style string
+    (isStringTag === false ||
+      // we need to always store it if we're in compat mode and
+      // in node since emotion-server relies on whether a style is in
+      // the registered cache to know whether a style is global or not
+      // also, note that this check will be dead code eliminated in the browser
+      (isBrowser === false && cache.compat !== undefined)) &&
+    cache.registered[className] === undefined
+  ) {
+    cache.registered[className] = serialized.styles
+  }
+  if (cache.inserted[serialized.name] === undefined) {
+    let stylesForSSR = ''
+    let current = serialized
+    do {
+      let maybeStyles = cache.insert(
+        `.${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'