Function resolveTheme

packages/opencode/src/cli/cmd/run/theme.ts:276–326

(theme: ThemeJson, pick: "dark" | "light")

}

export function resolveTheme(theme: ThemeJson, pick: "dark" | "light"): TuiThemeCurrent {
  const defs = theme.defs ?? {}

  const resolveColor = (value: ColorValue, chain: string[] = []): RGBA => {
    if (value instanceof RGBA) return value

    if (typeof value === "number") {
      return RGBA.fromIndex(value, ansiToRgba(value))
    }

    if (typeof value !== "string") {
      return resolveColor(value[pick], chain)
    }

    if (value === "transparent" || value === "none") {
      return RGBA.fromInts(0, 0, 0, 0)
    }

    if (value.startsWith("#")) {
      return RGBA.fromHex(value)
    }

    if (chain.includes(value)) {
      throw new Error(`Circular color reference: ${[...chain, value].join(" -> ")}`)
    }

    const next = defs[value] ?? theme.theme[value as ThemeColor]
    if (next === undefined) {
      throw new Error(`Color reference "${value}" not found in defs or theme`)
    }

    return resolveColor(next, [...chain, value])
  }

  const resolved = Object.fromEntries(
    Object.entries(theme.theme)
      .filter(([key]) => key !== "selectedListItemText" && key !== "backgroundMenu" && key !== "thinkingOpacity")
      .map(([key, value]) => [key, resolveColor(value as ColorValue)]),
  ) as Partial<Record<ThemeColor, RGBA>>

  return {
    ...(resolved as Record<ThemeColor, RGBA>),
    selectedListItemText:
      theme.theme.selectedListItemText === undefined
        ? resolved.background!
        : resolveColor(theme.theme.selectedListItemText),
    backgroundMenu:
      theme.theme.backgroundMenu === undefined ? resolved.backgroundElement! : resolveColor(theme.theme.backgroundMenu),
    thinkingOpacity: theme.theme.thinkingOpacity ?? 0.6,
  }
}

function generateGrayScale(bg: RGBA, isDark: boolean, map: (rgba: RGBA) => RGBA): Record<number, RGBA> {
  const r = bg.r * 255