ArtPlayer/packages/artplayer/src/setting/playbackRate.ts

import type { SettingHost, SettingItem } from './types'
import { subscribeSetting } from './resources'

export default function playbackRate(art: SettingHost): SettingItem {
  const {
    i18n,
    icons,
    constructor: { SETTING_ITEM_WIDTH, PLAYBACK_RATE },
  } = art

  function getI18n(value: number) {
    return value === 1.0 ? i18n.get('Normal') : value.toFixed(1)
  }

  function update() {
    const target = art.setting.find(`playback-rate-${art.playbackRate}`)
    art.setting.check(target)
  }

  return {
    width: SETTING_ITEM_WIDTH,
    name: 'playback-rate',
    html: i18n.get('Play Speed'),
    tooltip: getI18n(art.playbackRate),
    icon: icons.playbackRate,
    selector: PLAYBACK_RATE.map((item) => {
      return {
        value: item,
        name: `playback-rate-${item}`,
        default: item === art.playbackRate,
        html: getI18n(item),
      }
    }),
    onSelect(item) {
      art.playbackRate = item.value as number
      return item.html
    },
    mounted: (_element, item) => {
      update()
      subscribeSetting(art, item, 'video:ratechange', () => update())
    },
  }
}