resolve static method

CalcThemeData resolve(ThemeSpec spec, { bool highContrast = false, GlassRendering glass = GlassRendering.standard, })

The CalcThemeData for spec. highContrast (platform setting) selects the plain theme's high-contrast variants; generated themes get their high-contrast treatment from the accessible lock instead.

glass (glass mode and effects tier from MotionPreferences) is passed to the families in renderedKeyFaceRegistry: Liquid Glass's Reduce Transparency solid tint, frosted or full glass, and the other families' lite-tier artwork.

Implementation

static CalcThemeData resolve(
  ThemeSpec spec, {
  bool highContrast = false,
  GlassRendering glass = GlassRendering.standard,
}) {
  // Only Liquid Glass is translucent, so only it reads the glass mode;
  // the other rendered families read the effects tier alone (one memo
  // entry whatever Reduce Transparency says).
  final rendering = switch (spec.family) {
    ThemeFamily.liquidGlass => glass,
    final f when renderedKeyFaceRegistry.containsKey(f) => GlassRendering(
      tier: glass.tier,
    ),
    _ => GlassRendering.standard,
  };
  final key = (spec, highContrast, rendering);
  final hit = _memo.remove(key);
  if (hit != null) return _memo[key] = hit;
  final data = _memo[key] = _resolve(
    spec,
    highContrast: highContrast,
    glass: rendering,
  );
  while (_memo.length > memoCapacity) {
    _memo.remove(_memo.keys.first);
  }
  return data;
}