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fix(windows): idle WebView2 when Tauri windows are hidden (#273)

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* fix(windows): stop GPU rendering when windows are hidden

* perf(ui): tighten hidden-window rendering mitigation

Align implementation and documentation with what the injected pause/resume
scripts actually do, reduce main-thread and compositor wakeups while windows
are invisible, and make lifecycle cleanup reliable.

Rust (Tauri)

- Document PAUSE/RESUME as compositor-oriented hints: set __psyHidden, optional
  --psy-anim-speed for CSS that opts in, and pause @keyframes via
  animation-play-state only (not CSS transitions, not arbitrary timers or rAF).
- Walk descendants under #root instead of document-wide querySelectorAll('*')
  to cut cost on large pages; skip the walk if #root is missing (flag still set).
- Call eval(PAUSE_RENDERING_JS) before hide() on all hide paths (tray menu,
  tray icon toggle, mini open/close/show-main, native mini close) so the
  webview sees __psyHidden while still fully schedulable.
- Shorten pause_rendering command rustdoc to match the script.

Frontend

- WindowVisibilityProvider: replace self-rescheduling useCallback with a single
  effect that keeps one pending timeout id, uses a cancelled flag on unmount,
  and syncs hiddenRef from document.hidden at mount (no orphaned timers after
  tests/HMR).
- WaveformSeek (preview + animated seekbar): while hidden, poll with a 400 ms
  timeout instead of requestAnimationFrame every frame; cancel both rAF and
  timeout on teardown.

Why

- Accurate comments prevent future refactors from assuming “full JS idle”.
- Smaller DOM walks and fewer rAF wakeups reduce spikes when hiding the main
  window or mini player on Windows WebView2 and elsewhere.

* perf(ui): pause global CSS + timers when Tauri hides the window

Builds on PR #273 (`7803d8e` + `0e07a73`). Adds a second HTML flag driven only by
Rust pause/resume inject so infinite animations still pause when WebView2 keeps
`document.hidden === false` after `win.hide()`, and stops a few periodic JS
timers while the window is invisible.

- `lib.rs`: set/remove `data-psy-native-hidden` on `<html>` in PAUSE/RESUME JS;
  document why in rustdoc (rest of pause/resume unchanged from PR tip).
- `components.css`: same `animation-play-state: paused !important` rules as
  `data-app-hidden` for `[data-psy-native-hidden="true"]`; refresh the comment.
- `App.tsx`: comment distinguishes tab visibility vs Tauri-native hide.
- `Hero.tsx`: do not run the 10 s carousel interval while hidden
  (`useWindowVisibility` + `__psyHidden` in tick).
- `PlaybackScheduleBadge.tsx`, `playbackScheduleFormat.ts`: no 400/500 ms
  intervals while hidden; skip ticks when `document.hidden` or `__psyHidden`.
This commit is contained in:
Ivan Pelipenko
2026-04-23 23:47:23 +03:00
committed by GitHub
parent 694567843f
commit 0ead4fbeb1
9 changed files with 258 additions and 52 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/components/WaveformSeek.tsx
+43 -7
View File
@@ -727,7 +727,6 @@ export function SeekbarPreview({
onClick: () => void;
}) {
const canvasRef = useRef<HTMLCanvasElement>(null);
const rafRef = useRef<number | null>(null);
useEffect(() => {
const canvas = canvasRef.current;
@@ -738,16 +737,35 @@ export function SeekbarPreview({
}
const animState = makeAnimState();
let t = 0;
let rafId: number | null = null;
let pollId: number | null = null;
const stop = () => {
if (rafId !== null) {
cancelAnimationFrame(rafId);
rafId = null;
}
if (pollId !== null) {
window.clearTimeout(pollId);
pollId = null;
}
};
const tick = () => {
if (document.hidden || (window as any).__psyHidden) {
pollId = window.setTimeout(() => {
pollId = null;
tick();
}, 400);
return;
}
t += 0.016;
animState.time = t;
const progress = 0.15 + 0.65 * (0.5 + 0.5 * Math.sin(t));
const buffered = Math.min(1, progress + 0.18);
drawSeekbar(canvas, style, heights, progress, buffered, animState);
rafRef.current = requestAnimationFrame(tick);
rafId = requestAnimationFrame(tick);
};
rafRef.current = requestAnimationFrame(tick);
return () => { if (rafRef.current !== null) cancelAnimationFrame(rafRef.current); };
tick();
return () => stop();
}, [style]);
return (
@@ -869,14 +887,32 @@ export default function WaveformSeek({ trackId }: Props) {
const canvas = canvasRef.current;
if (!canvas) return;
animStateRef.current = makeAnimState();
let rafId: number;
let rafId: number | null = null;
let pollId: number | null = null;
const stop = () => {
if (rafId !== null) {
cancelAnimationFrame(rafId);
rafId = null;
}
if (pollId !== null) {
window.clearTimeout(pollId);
pollId = null;
}
};
const tick = () => {
if (document.hidden || (window as any).__psyHidden) {
pollId = window.setTimeout(() => {
pollId = null;
tick();
}, 400);
return;
}
animStateRef.current.time += 0.016;
drawSeekbar(canvas, seekbarStyle, heightsRef.current, progressRef.current, bufferedRef.current, animStateRef.current);
rafId = requestAnimationFrame(tick);
};
rafId = requestAnimationFrame(tick);
return () => cancelAnimationFrame(rafId);
tick();
return () => stop();
}, [seekbarStyle]);
// Resize observer.