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feat(lint): add gsap_non_transform_motion rule, migrate registry comps to transforms

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Animating layout properties (left/right/top/bottom/margin*) or using
roundProps snaps motion to integer device pixels. Under the seek-by-frame
capture engine this is invisible at high per-frame deltas (fast tweens) but
visibly stutters at low deltas (slow tweens / ease-out tails): sub-pixel
movement rounds to the same pixel for several frames, then jumps a whole
pixel. Transforms (x/y/scale) interpolate sub-pixel and stay smooth.

New rule gsap_non_transform_motion (error):
- Sources timeline tweens from the acorn parser's full animation list, so
  label- and relative-positioned tweens (tl.to(..., "label") / "+=1") are
  covered and real AST keys avoid phantom-prop / nested-brace misreads.
- Exempts html-in-canvas elements (a <canvas layoutsubtree> ancestor): they
  are rasterized from sub-pixel getComputedStyle and do not integer-snap.
  Per-element resolution, so a grouped glass+text tween still flags the
  plain-DOM half. roundProps is never exempt (it rounds before the style).
- Uses Object.hasOwn for the layout-prop lookup, skips set(), and merges
  standalone gsap.* calls.

Migrated 9 registry compositions off layout-prop animation onto transforms,
each render-verified visually identical:
- liquid-glass-{notification,widgets,media-controls,context-menu}: plain-DOM
  text overlays -> transforms; glass panels stay on left/top (canvas-exempt).
- vignelli: curtain wipes left:% -> xPercent.
- lt-mask-reveal: sweep left:% -> x px.
- flowchart, flowchart-vertical, decision-tree: cursor paths left/top -> x/y.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Vance Ingalls
2026-06-29 09:46:02 -07:00
co-authored by Claude Opus 4.8
parent c811a2750a
commit 619a603eab
11 changed files with 498 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files
registry/blocks/liquid-glass-media-controls/liquid-glass-media-controls.html
Vendored
+38 -11
View File
@@ -581,13 +581,27 @@
var sliderPct = document.getElementById("slider-pct");
var sliderValue = { value: 34 };
gsap.set([gs, ts, gt, tt, gm, tm, gsl, tsl], { top: 1160, opacity: 1 });
// Glass panels live inside <canvas layoutsubtree> (html-in-canvas): the canvas lib
// reads their sub-pixel computed top/left, so animating layout props on them does
// NOT stutter and is exempt from gsap_non_transform_motion. They keep top/left.
// Plain-DOM text overlays DO stutter on layout props, so they use transforms (x/y).
// CSS resting tops — search 300, toggle 390, media 476, slider 616 — are the
// transform base; the original set seeded top:1160, i.e. y = 1160 - restingTop.
gsap.set([gs, gt, gm, gsl], { top: 1160, opacity: 1 });
gsap.set(ts, { y: 860, opacity: 1 });
gsap.set(tt, { y: 770, opacity: 1 });
gsap.set(tm, { y: 684, opacity: 1 });
gsap.set(tsl, { y: 544, opacity: 1 });
gsap.set("#sound-wave span", { height: 7 });
tl.to([gs, ts], { top: 300, duration: 0.48, ease: "power3.out" }, 0.12);
tl.to([gt, tt], { top: 390, duration: 0.44, ease: "power3.out" }, 0.22);
tl.to([gm, tm], { top: 476, duration: 0.44, ease: "power3.out" }, 0.32);
tl.to([gsl, tsl], { top: 616, duration: 0.46, ease: "power3.out" }, 0.42);
tl.to(gs, { top: 300, duration: 0.48, ease: "power3.out" }, 0.12);
tl.to(ts, { y: 0, duration: 0.48, ease: "power3.out" }, 0.12);
tl.to(gt, { top: 390, duration: 0.44, ease: "power3.out" }, 0.22);
tl.to(tt, { y: 0, duration: 0.44, ease: "power3.out" }, 0.22);
tl.to(gm, { top: 476, duration: 0.44, ease: "power3.out" }, 0.32);
tl.to(tm, { y: 0, duration: 0.44, ease: "power3.out" }, 0.32);
tl.to(gsl, { top: 616, duration: 0.46, ease: "power3.out" }, 0.42);
tl.to(tsl, { y: 0, duration: 0.46, ease: "power3.out" }, 0.42);
tl.call(
function () {
@@ -608,13 +622,13 @@
null,
1.55,
);
tl.to("#toggle-pill", { left: 215, duration: 0.24, ease: "power2.out" }, 1.82);
tl.to("#toggle-pill", { x: 209, duration: 0.24, ease: "power2.out" }, 1.82);
tl.to(
".play-btn",
{ scale: 0.86, duration: 0.12, ease: "power2.out", yoyo: true, repeat: 1 },
2.18,
);
tl.to("#album-sheen", { left: 112, duration: 0.75, ease: "power2.out" }, 2.2);
tl.to("#album-sheen", { x: 182, duration: 0.75, ease: "power2.out" }, 2.2);
tl.to(
"#sound-wave span",
{ height: 15, duration: 0.22, ease: "power2.inOut", stagger: 0.05, yoyo: true, repeat: 12 },
@@ -638,11 +652,24 @@
{ scale: 1.45, duration: 0.24, ease: "power2.out", yoyo: true, repeat: 4 },
2.6,
);
tl.to("#toggle-pill", { left: 425, duration: 0.24, ease: "power2.out" }, 4.15);
tl.to("#toggle-pill", { x: 419, duration: 0.24, ease: "power2.out" }, 4.15);
var stack = [gs, ts, gt, tt, gm, tm, gsl, tsl];
tl.to(stack, { top: "-=8", duration: 0.22, ease: "power2.out", yoyo: true, repeat: 1 }, 5.55);
tl.to(stack, { top: "+=760", duration: 0.42, ease: "power2.in" }, 6.72);
// Settle + exit. Split so glass panels keep relative top (exempt, html-in-canvas)
// and plain-DOM text overlays use the relative transform equivalent (y). Inline
// array literals so the linter can resolve each group's targets; a pre-declared
// array variable resolves to __unresolved__ and would lose the canvas exemption.
tl.to(
[gs, gt, gm, gsl],
{ top: "-=8", duration: 0.22, ease: "power2.out", yoyo: true, repeat: 1 },
5.55,
);
tl.to(
[ts, tt, tm, tsl],
{ y: "-=8", duration: 0.22, ease: "power2.out", yoyo: true, repeat: 1 },
5.55,
);
tl.to([gs, gt, gm, gsl], { top: "+=760", duration: 0.42, ease: "power2.in" }, 6.72);
tl.to([ts, tt, tm, tsl], { y: "+=760", duration: 0.42, ease: "power2.in" }, 6.72);
/* Duration driver */
tl.to({ v: 0 }, { v: 1, duration: DURATION, ease: "none" }, 0);