Files
amethyst/nappletHost
Vitor PamplonaandClaude Opus 4.8 43aebcca63 fix(embed): make embedded + full-screen WebViews follow the app theme
The embedded in-app browser and napplet/nSite surfaces rendered web content in
the device theme, ignoring the app's DARK/LIGHT preference — a site with dark
support stayed light when the app was dark (and vice versa). The full-screen
activities had the same latent gap (they followed the device, not the app).

Root cause: WebView's dark decision (prefers-color-scheme via algorithmic
darkening) reads the context's THEME (?android:attr/isLightTheme), not just the
Configuration uiMode. The off-window SurfaceControlViewHost surface context
carries neither the host window's theme nor its night mode, so the renderer came
up light. The old applyNightMode() used UiModeManager.setNightMode — a
permission-gated no-op — so the theme never reached the WebView at all.

Fix: build every embed/host WebView from nightThemedContext() — a
ContextThemeWrapper over a forced-night/day Configuration with a DayNight theme,
so the theme's isLightTheme resolves from the app's resolved theme. Shared in
EmbedWebViewTheme.kt; used by NappletBrowserService, NappletHostService,
NappletBrowserActivity, and NappletHostActivity. Removed the dead applyNightMode
no-op from all four. (Verified on device with a throwaway SurfaceControlViewHost
repro: config-only context does NOT work; setForceDark is a no-op at targetSdk
37; setApplicationNightMode does nothing; the DayNight ContextThemeWrapper is
what flips the renderer, even across the cross-process embedded surface.)

Device-verified: all four surfaces follow the app theme even when it differs
from the device.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-26 10:49:44 -04:00
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