Function resolveThemeVariant

packages/ui/src/theme/resolve.ts:4–456

(variant: ThemeVariant, isDark: boolean)

import { blend, generateNeutralScale, generateScale, hexToOklch, hexToRgb, shift, withAlpha } from "./color"

export function resolveThemeVariant(variant: ThemeVariant, isDark: boolean): ResolvedTheme {
  const colors = getColors(variant)
  const { overrides = {} } = variant

  const neutral = generateNeutralScale(colors.neutral, isDark, colors.ink)
  const primary = generateScale(colors.primary, isDark)
  const accent = generateScale(colors.accent, isDark)
  const success = generateScale(colors.success, isDark)
  const warning = generateScale(colors.warning, isDark)
  const error = generateScale(colors.error, isDark)
  const info = generateScale(colors.info, isDark)
  const interactive = generateScale(colors.interactive, isDark)
  const amber = generateScale(
    shift(colors.warning, isDark ? { h: -16, l: -0.058, c: 1.14 } : { h: -22, l: -0.082, c: 0.94 }),
    isDark,
  )
  const blue = generateScale(shift(colors.interactive, { h: -12, l: 0.128, c: 1.12 }), isDark)
  const diffAdd = generateScale(
    colors.diffAdd ?? shift(colors.success, { c: isDark ? 0.7 : 0.55, l: isDark ? -0.18 : 0.14 }),
    isDark,
  )
  const diffDelete = generateScale(
    colors.diffDelete ?? shift(colors.error, { c: isDark ? 0.82 : 0.7, l: isDark ? -0.08 : 0.08 }),
    isDark,
  )
  const ink = colors.ink ?? colors.neutral
  const tint = colors.compact ? hexToOklch(ink) : undefined
  const body = tint
    ? shift(ink, {
        l: isDark ? Math.max(0, 0.88 - tint.l) * 0.4 : -Math.max(0, tint.l - 0.18) * 0.24,
        c: isDark ? 1.04 : 1.02,
      })
    : undefined
  const backgroundOverride = overrides["background-base"]
  const backgroundHex = getHex(backgroundOverride)
  const overlay = Boolean(backgroundOverride) && !backgroundHex
  const content = (seed: HexColor, scale: HexColor[]) => {
    const base = hexToOklch(seed)
    const value = isDark ? (base.l > 0.84 ? shift(seed, { c: 1.18 }) : scale[10]) : scale[10]
    return shift(value, { l: isDark ? 0.034 : -0.024, c: isDark ? 1.3 : 1.18 })
  }
  const modified = () => {
    if (!colors.compact) return isDark ? "#ffba92" : "#FF8C00"
    const warningHue = hexToOklch(colors.warning).h
    const deleteHue = hexToOklch(colors.diffDelete ?? colors.error).h
    const delta = Math.abs(((((deleteHue - warningHue) % 360) + 540) % 360) - 180)
    if (delta < 48) return isDark ? "#ffba92" : "#FF8C00"
    return content(colors.warning, warning)
  }
  const surface = (
    seed: HexColor,
    alpha: { base: number; weak: number; weaker: number; strong: number; stronger: number },
  ) => {
    const base = alphaTone(seed, alpha.base)
    return {
      base,
      weak: alphaTone(seed, alpha.weak),
      weaker: alphaTone(seed, alpha.weaker),