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context.ts
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context.ts
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import { createFilter } from '@rollup/pluginutils'
import { loadConfig } from '@unocss/config'
import { BetterMap, createGenerator, UnoGenerator, UserConfigDefaults } from '@unocss/core'
import { INCLUDE_COMMENT } from './constants'
import { defaultExclude, defaultInclude } from './defaults'
import { PluginConfig } from './types'
export interface UnocssPluginContext<Config extends PluginConfig = PluginConfig> {
uno: UnoGenerator
config: Config
tokens: Set<string>
modules: BetterMap<string, string>
filter: (code: string, id: string) => boolean
reloadConfig: () => Promise<void>
extract: (code: string, id?: string) => Promise<void>
configFilepath?: string
invalidate: () => void
onInvalidate: (fn: () => void) => void
}
export function createContext<Config extends PluginConfig = PluginConfig>(
configOrPath?: Config | string,
defaults: UserConfigDefaults = {},
): UnocssPluginContext<Config> {
const { config = {} as Config, filepath } = loadConfig<Config>(configOrPath)
const uno = createGenerator(config, defaults)
const invalidations: Array<() => void> = []
const modules = new BetterMap<string, string>()
const tokens = new Set<string>()
let rollupFilter = createFilter(
config.include || defaultInclude,
config.exclude || defaultExclude,
)
function invalidate() {
invalidations.forEach(cb => cb())
}
async function extract(code: string, id?: string) {
if (id)
modules.set(id, code)
const len = tokens.size
await uno.applyExtractors(code, id, tokens)
if (tokens.size > len)
invalidate()
}
async function reloadConfig() {
if (!filepath)
return
uno.setConfig(loadConfig(filepath).config)
uno.config.envMode = 'dev'
rollupFilter = createFilter(
config.include || defaultInclude,
config.exclude || defaultExclude,
)
tokens.clear()
await Promise.all(modules.map((code, id) => uno.applyExtractors(code, id, tokens)))
invalidate()
}
const filter = (code: string, id: string) => {
return code.includes(INCLUDE_COMMENT) || rollupFilter(id)
}
return {
tokens,
modules,
invalidate,
onInvalidate(fn: () => void) {
invalidations.push(fn)
},
filter,
reloadConfig,
uno,
extract,
config,
configFilepath: filepath,
}
}