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feat(flutter): #396 — full-screen now-playing polish

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Three of the four locked items (1, 2, 4); item 6 (swipe-tabs) stays
deferred until server-side lyrics ingestion exists.

1. Dominant-color gradient backdrop. New album_color_extractor.dart
   wraps the existing AlbumCoverCache: extracts the dominant color
   via PaletteGenerator over the local file, caches in-memory keyed
   by album_id. Top 55% of the screen carries the color (0.55 alpha
   → fs.obsidian) so controls below stay legible. AnimatedContainer
   tweens the gradient across track changes.

2. Hero transition for cover art (mini bar → full screen). Stable
   kPlayerCoverHeroTag (not media.id keyed) so the transition works
   regardless of what's playing and isn't racy if media swaps mid-tap.
   flightShuttleBuilder renders the destination's Hero widget for the
   whole flight, which reads as a clean grow rather than a swap.

4. Crossfade on track change. AnimatedSwitcher around the album art,
   title, and artist+album text block, all keyed by media.id so the
   switcher fades between old and new on each track-change rebuild.
   Pairs with the AnimatedContainer gradient so the whole "what's
   playing" zone changes in lockstep.

palette_generator: ^0.3.3 added.

For #396 / #356 umbrella.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Bryan Van Deusen
2026-05-13 13:40:51 -04:00
parent b5c5dbbe76
commit 046ee8d576
5 changed files with 210 additions and 39 deletions
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flutter_client/lib/player/player_bar.dart
+29 -17
View File
@@ -10,6 +10,7 @@ import '../likes/like_button.dart';
import '../models/track.dart';
import '../shared/widgets/track_actions/track_actions_button.dart';
import '../theme/theme_extension.dart';
import 'now_playing_screen.dart' show kPlayerCoverHeroTag;
import 'player_provider.dart';
/// Compact player bar mounted at the bottom of the app shell. Mini
@@ -88,29 +89,40 @@ class _TrackInfo extends StatelessWidget {
final fs = Theme.of(context).extension<FabledSwordTheme>()!;
final artistName = (media.artist ?? '').trim();
// Cover is wrapped in a Hero with the shared kPlayerCoverHeroTag so
// tapping the mini bar to expand into NowPlayingScreen animates the
// artwork from this 48dp footprint to the full-screen size rather
// than fade-cutting. Tag is stable per-route (not keyed by media.id)
// so the transition works regardless of what's playing.
Widget cover;
if (media.artUri != null) {
cover = Image(
image: media.artUri!.isScheme('file')
? FileImage(File.fromUri(media.artUri!)) as ImageProvider
: NetworkImage(media.artUri.toString()),
width: 48,
height: 48,
// Without a fit, Image paints the source at its intrinsic
// resolution inside the 48dp box — a thumbnail-sized cover
// would render as a tiny inset. Cover stretches/crops to fill
// the box uniformly.
fit: BoxFit.cover,
errorBuilder: (_, __, ___) =>
Container(width: 48, height: 48, color: fs.slate),
);
} else {
cover = Container(width: 48, height: 48, color: fs.slate);
}
return Row(
// Default centering vertically aligns the like/kebab buttons
// against the album art (48dp) — visually they span the title +
// artist block instead of sitting on the title baseline.
crossAxisAlignment: CrossAxisAlignment.center,
children: [
if (media.artUri != null)
Image(
image: media.artUri!.isScheme('file')
? FileImage(File.fromUri(media.artUri!)) as ImageProvider
: NetworkImage(media.artUri.toString()),
width: 48,
height: 48,
// Without a fit, Image paints the source at its intrinsic
// resolution inside the 48dp box — a thumbnail-sized cover
// would render as a tiny inset. Cover stretches/crops to
// fill the box uniformly.
fit: BoxFit.cover,
errorBuilder: (_, __, ___) =>
Container(width: 48, height: 48, color: fs.slate),
)
else
Container(width: 48, height: 48, color: fs.slate),
Hero(
tag: kPlayerCoverHeroTag,
child: cover,
),
const SizedBox(width: 12),
Expanded(
child: Column(