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index.ts
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index.ts
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import type { Preset } from '@unocss/core'
import { toArray } from '@unocss/core'
import { BunnyFontsProvider } from './providers/bunny'
import { GoogleFontsProvider } from './providers/google'
import { FontshareProvider } from './providers/fontshare'
import { NoneProvider } from './providers/none'
import type { Provider, ResolvedWebFontMeta, WebFontMeta, WebFontsOptions, WebFontsProviders } from './types'
export * from './types'
const builtinProviders = {
google: GoogleFontsProvider,
bunny: BunnyFontsProvider,
fontshare: FontshareProvider,
none: NoneProvider,
}
function resolveProvider(provider: WebFontsProviders): Provider {
if (typeof provider === 'string')
return builtinProviders[provider]
return provider
}
export { createGoogleCompatibleProvider as createGoogleProvider } from './providers/google'
export function normalizedFontMeta(meta: WebFontMeta | string, defaultProvider: WebFontsProviders): ResolvedWebFontMeta {
if (typeof meta !== 'string') {
meta.provider = resolveProvider(meta.provider || defaultProvider)
if (meta.weights)
meta.weights = [...new Set(meta.weights.map(Number).sort((a, b) => a - b))]
return meta as ResolvedWebFontMeta
}
const [name, weights = ''] = meta.split(':')
return {
name,
weights: [...new Set(weights.split(/[,;]\s*/).filter(Boolean).map(Number).sort((a, b) => a - b))],
provider: resolveProvider(defaultProvider),
}
}
function preset(options: WebFontsOptions = {}): Preset<any> {
const {
provider: defaultProvider = 'google',
extendTheme = true,
inlineImports = true,
themeKey = 'fontFamily',
customFetch,
} = options
const fontObject = Object.fromEntries(
Object.entries(options.fonts || {})
.map(([name, meta]) => [name, toArray(meta).map(m => normalizedFontMeta(m, defaultProvider))]),
)
const fonts = Object.values(fontObject).flatMap(i => i)
const importCache: Record<string, Promise<string>> = {}
async function importUrl(url: string) {
if (inlineImports) {
if (!importCache[url]) {
const userAgentWoff2 = 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36'
const promise = customFetch
? customFetch(url)
: (await import('ofetch')).$fetch(url, { headers: { 'User-Agent': userAgentWoff2 }, retry: 3 })
importCache[url] = promise.catch((e) => {
console.error('Failed to fetch web fonts')
console.error(e)
if (typeof process !== 'undefined' && process.env.CI)
throw e
})
}
return await importCache[url]
}
else {
return `@import url('${url}')`
}
}
const enabledProviders = new Set(fonts.map(i => i.provider))
const preset: Preset<any> = {
name: '@unocss/preset-web-fonts',
preflights: [
{
async getCSS() {
const preflights: (string | undefined)[] = []
for (const provider of enabledProviders) {
const fontsForProvider = fonts.filter(i => i.provider.name === provider.name)
if (provider.getImportUrl) {
const url = provider.getImportUrl(fontsForProvider)
if (url)
preflights.push(await importUrl(url))
}
preflights.push(provider.getPreflight?.(fontsForProvider))
}
return preflights.filter(Boolean).join('\n')
},
},
],
}
if (extendTheme) {
preset.extendTheme = (theme) => {
if (!theme[themeKey])
theme[themeKey] = {}
const obj = Object.fromEntries(
Object.entries(fontObject)
.map(([name, fonts]) => [name, fonts.map(f => f.provider.getFontName?.(f) ?? `"${f.name}"`)]),
)
for (const key of Object.keys(obj)) {
if (typeof theme[themeKey][key] === 'string')
theme[themeKey][key] = obj[key].map(i => `${i},`).join('') + theme[themeKey][key]
else
theme[themeKey][key] = obj[key].join(',')
}
}
}
return preset
}
export default preset