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add setting for lyrics follow alignment

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jeffvli
2026-07-09 01:31:04 -07:00
parent bdcc88cbfe
commit df37123382
12 changed files with 99 additions and 4 deletions
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src/renderer/features/lyrics/hooks/lyrics-animation-engine.ts
+8 -2
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@@ -17,9 +17,9 @@ const LINE_ANIMATING_CLASS = 'lyrics-line-animating';
const LINE_PRE_ANIMATING_CLASS = 'lyrics-line-pre-animating';
const TIME_JUMP_THRESHOLD = 0.5;
const CENTER_SCROLL_POS_RATIO = 0.5;
const DEFAULT_ENDING_THRESHOLD = 0.5;
const DEFAULT_LINE_LEAD_TIME_MS = 800;
const DEFAULT_SCROLL_POS_RATIO = 0.37;
const RICHSYNC_TIMING_OFFSET_MS = 150;
const SYNC_TIMING_OFFSET_MS = 115;
const GLOW_DURATION_MULTIPLIER = 1.6;
@@ -90,6 +90,7 @@ export interface TickOptions {
currentTimeMs: number;
eventCreationTime: number;
follow?: boolean;
followScrollAlignment?: number;
forceResync?: boolean;
isPlaying: boolean;
lineLeadTimeMs?: number;
@@ -99,6 +100,10 @@ export interface TickOptions {
smoothScroll?: boolean;
}
export const getFollowScrollPositionRatio = (followScrollAlignment = 0): number => {
return Math.min(0.95, Math.max(0.05, CENTER_SCROLL_POS_RATIO + followScrollAlignment / 100));
};
const reflow = (element: HTMLElement): void => {
void element.offsetHeight;
};
@@ -735,7 +740,8 @@ export const tickLyricsAnimation = (state: AnimEngineState, opts: TickOptions):
state.lastActiveElements = activeElems.filter((entry) => playbackTimeSec >= entry.time);
if (activeElems.length > 0) {
const scrollPosOffset = scrollHeight * DEFAULT_SCROLL_POS_RATIO;
const scrollPosRatio = getFollowScrollPositionRatio(opts.followScrollAlignment);
const scrollPosOffset = scrollHeight * scrollPosRatio;
const lastActive = activeElems[activeElems.length - 1];
const useLastActiveOnly = newLyricSelected || activeElems.length > 1;
const scrollLines = useLastActiveOnly ? [lastActive] : activeElems;