* feat(studio): mirror canvas z-order actions into timeline lanes, badge z overrides
Track order = default paint order; authored z = advanced override.
- timelineZMirror.ts: pure resolver mapping a successful z-menu action to a
timeline lane move — closest track in the action's direction that is free
over the clip's whole span, else a new lane adjacent to the crossed
neighbor; temporal-overlap scope (default pending product sign-off, see
module doc); visual zone only; same-file reference scoping; persistTrack
via the shared authored-space rules. null for non-clips (menu stays
z-only) and at-extreme/no-overlap cases.
- useCanvasZOrderTimelineMirror.ts: after the z commit resolves, the mirror
persists the lane move through the same machinery as a timeline lane drag
(optimistic store update, authoredTrack refresh, rollback); inserts reuse
commitTrackInsert's renumber via a shared buildTrackInsertEdits core. Both
writes share one coalesce key (zReorderCoalesceKey) and fold into ONE undo
entry (test proves it over the real history reducer). The mirror never
triggers the lane->z stacking sync, so it cannot fight the z values the
action just set.
- timelineZOverride.ts + TimelineClip badge: clips whose paint order
contradicts lane order among temporally-overlapping same-context visual
neighbors (laneIsAbove XOR paintsAbove, the stacking-sync predicates) show
a 'z' badge — authored z overrides are surfaced instead of silently
disagreeing with the timeline.
- Timeline.tsx track derivations extracted to useTimelineTrackDerivations
(600-line cap).
* fix(studio): fold mirrored z-order gestures into one undo entry across slow persists
Live verification caught the z write and the mirrored lane write splitting
into two undo entries: the mirror runs after the z persist's server round
trip, which exceeds editHistory's default 300ms coalesce window under real
latency (the unit test's deterministic clock sat inside it).
zReorderCoalesceKey now mints a per-gesture-unique key (monotonic seq, the
laneChangeGestureSeq precedent) and both records carry coalesceMs Infinity —
distinct gestures can never merge, and one gesture always folds regardless
of write latency. coalesceMs threaded through the persist chain alongside
coalesceKey. Also hardens the existing lane-drag move->z fold, which had the
same latent split. Fold test now simulates a 400ms gap (failed before the
fix, passes after); a two-separate-gestures test asserts two entries.
* feat(studio): flashless lane mirror, z-order menu icons, close-gap track menu
- Track-only batch moves (the z-mirror's lane hop and the insert renumber)
skip the GSAP fallback round-trip and the preview reload entirely — the
renderer never reads data-track-index, and the live DOM patch + optimistic
store update cover the UI. Mixed batches keep current behavior. Kills the
canvas blink on mirrored Bring/Send actions (live-verified: an
iframe-scoped marker survives the whole gesture).
- The four z-order menu items get 16px stroke icons (single layer diamond +
directional arrow for Forward/Backward; pierced two-layer stack for
Front/Back); labels unchanged — they are the industry-standard names.
- New track context menu on empty lane space: 'Close gap' (shifts the next
clip and every clip after it on that lane left by the clicked gap's width;
leading gaps count, so a single clip with empty space before it compacts
to 0) and 'Close all gaps' (whole lane contiguous from 0). Pure gap math
in timelineGaps.ts; persists through the drag path's atomic batch move
(one undo per action); refuses when a clip that must shift is locked;
items disable when there is nothing to close.
* fix(studio): rebind-only preview sync for unmutated timing edits, classical z-menu order
Timing edits that rewrote NO GSAP positions (gap closes and moves of
selector-addressed caption clips, zero-delta batches, comps without a
rewritable script) full-reloaded the preview — and the rerun-current-scripts
attempt was wrong for real compositions: re-executing init-style scripts
(three.js scenes, caption engines) is exactly the unsafe case, verified live
by doubled init warnings and a fallback reload anyway.
The correct observation: when mutated === false the existing __timelines are
still valid — only the runtime's clip visibility windows are stale, and the
live DOM timing attributes were already patched. So the no-mutation path now
runs applySoftReloadFinalization only (seek + __hfForceTimelineRebind +
manual-edits reapply), extracted from the soft-reload machinery — zero
script execution. This also un-blinks comps with no GSAP script at all,
which previously always remounted. Rewritten-script soft reloads,
cannot-soft-reload, otherFileChanged, and mutation failures keep their
existing behavior. gsapSoftReload's undo/redo restore section moved verbatim
to gsapUndoRestore.ts for the 600-line cap.
Also: z-order menu items reordered to the classical arrangement (Bring to
Front, Bring Forward, Send Backward, Send to Back).
Live-verified on a three.js-heavy composition: Close-all-gaps shifted 4
caption clips with correct cumulative amounts, the preview iframe was never
remounted (marker survived), and one undo reverted everything.
* fix(studio): bound forward/backward mirror to a one-element step
User-specified semantic: Bring Forward / Send Backward move the clip past
EXACTLY ONE element. The mirror's lane target is now bounded by the next
temporally-overlapping element beyond the crossed neighbor: a free lane
strictly between the two is taken (closest to the neighbor), and when they
are back-to-back a new track is inserted immediately beyond the crossed
element — never past the second one. Previously the resolver took the
closest free lane anywhere beyond the neighbor, which could carry the track
past a second element while the z action only stepped past one — a
track/paint contradiction our own zOverride badge would flag. Front/back
keep whole-set semantics (past everything; back stays above the audio
zone). End-to-end test pins the 3-stacked case through commitZMirrorLaneMove
to the persisted renumbered tracks.
* feat(studio): permanent gap-menu rows with hover and click-select gap highlights
- TrackGapContextMenu always renders both rows; an inapplicable action dims
with a tooltip ("No gap here" / lock reason / "No gaps on this track")
instead of vanishing into a one-item menu. Width badge only when a gap
exists under the pointer.
- Hovering an ACTIONABLE row highlights the strip(s) it would close in the
timeline: the single gap for Close gap, every current gap (leading included)
for Close all gaps. New resolveAllGapIntervals in timelineGaps.ts reports
present-state intervals (epsilon-tolerant, overlap-safe), distinct from
resolveAllTrackGaps' post-compaction starts.
- Click-selecting a single clip paints a quieter tint over its lane's gaps
(suppressed for marquee multi-selection and during drags; the gap-menu hover
wins on its own lane). Derivation lives in useTimelineGapHighlights with the
pure buildTimelineGapStrips exported and unit-tested.
- Strips render in TimelineCanvas with the drop-placeholder geometry (row top
+ clip inset), dashed accent for hover, faint tint for selection.
- Timeline.tsx stayed under the 600-line cap by extracting the scroll-viewport
plumbing (ResizeObserver width + shortcut-hint sync) into
useTimelineScrollViewport, behavior unchanged.
* feat(studio): stronger capcut-style timeline zoom steps
One button press / pinch gesture now moves the zoom meaningfully: step
factors 1.25x/0.8x -> 1.5x/(2/3) (kept reciprocal so in+out round-trips) and
pinch sensitivity 0.0035 -> 0.007. Addresses "zooming several times to get
anywhere" feedback; cursor anchoring unchanged.
* feat(studio): three-way z sync — layers drags mirror timeline lanes, panel tracks live z edits
Completes the layers/canvas/timeline sync triangle: the Layers panel was the
one surface whose reorders never reached the timeline, and the one that went
stale when the other two wrote z flashlessly.
- Layers drag -> minimal z + equal-jump lane mirror. handleReorder now uses
the canvas menu's realization core via resolveZOrderReposition (one
between-z write when a strict gap exists, band-safe scoped renumber
otherwise) instead of computeReorderZValues' all-sibling stamp — that
helper is deleted, completing the #2347 unification follow-up. The drop
then mirrors into a timeline lane move through the same machinery as the
canvas menu (new resolveRepositionLaneMove: the clip lands on a free lane
strictly between its NEW paint neighbors' lanes — nearest clip siblings in
the desired render order, decorations skipped — else a track insert at
that boundary; audio zone never crossed). Both writes share one
per-gesture zReorderCoalesceKey with an unbounded fold window, so a drag
is exactly ONE undo entry; useCanvasZOrderTimelineMirror's plumbing is
factored into useMirrorLaneMoveCommit and reused by the new
useLayerReorderTimelineMirror. A same-slot drop is a hard no-op (new
order-equality guard in resolveZOrderReposition).
- Panel staleness fix: flashless z commits (skipReload) reload nothing and
bump no refreshKey, so the panel's z-sorted order went stale while paused.
handleDomZIndexReorderCommit now bumps a store zEditVersion on apply AND
rollback; the panel re-collects on it. Verified live: the panel re-sorts
the instant a drag commits and again on undo.
- Layer click reveal (useLayerRevealOverride): clicking a layer that stays
hidden at the current frame (animation-parked opacity, non-clip
display/visibility hides, hidden ancestors) temporarily forces the chain
visible with live inline styles — exact priors restored on deselect, on
another reveal, on play, and on unmount; never persisted (file diff == 0
verified live). Clips keep the existing seek-into-window behavior; the
override applies on a short defer so a seek-revealed clip needs none.
- layerOrdering's unused hasExplicitZIndex probe (zero callers) removed.
Live-verified on a bed copy: a 2-position layers drag wrote exactly one
element (z 6->23 + data-track-index 15->2), the timeline lane moved without
a reload, and a single Cmd+Z restored the file byte-identically.
* feat(studio): full-track selection highlight, borderless gap hover strips
- Click-selecting a clip now lights the WHOLE lane minus its clips — leading
gap, inter-clip gaps, and the open space after the last clip to the rendered
end (new resolveLaneEmptyIntervals; displayDuration threaded into the strip
derivation). Still click-only: any drag/resize suppresses the strips, and a
marquee multi-select never shows them.
- The gap-menu hover strips drop the dashed border (user feedback) — fill only,
nudged to 0.18 alpha to keep the same visual weight.
* feat(studio): selected layer paints on top via a reader-transparent z lift
Clicking a layer in the Layers tab now shows the element as if it were at the
very top of the stack while selected — whatever its authored z or panel
position — extending the reveal override (which already forced hidden chains
visible) with a temporary inline z lift:
- liftElementToTop parks the TRUE effective z in data-hf-reveal-prior-z and
writes a far-top inline z; a static element gets a layout-preserving
position:relative with its prior parked in data-hf-reveal-prior-pos. Only
the RENDERER sees the lift: all three studio z readers
(readTimelineElementZIndex, getElementZIndex, readEffectiveZIndex) return
the parked prior while the attribute is present, so the canvas z-menu, the
zOverride badge, the lane mirror, the stacking sync, and the panel sort
keep reasoning on the element's real z.
- Strictly ephemeral: exact priors restored on deselect / another reveal /
play / unmount, each property only while it still holds the value the
override wrote (a later real edit is never clobbered). File diff == 0
verified live across a full lift/restore cycle.
- A z-reorder commit CONSUMES an active lift (handleDomZIndexReorderCommit
reads the parked position for its persist-position:relative static check,
then drops the attributes) — the committed z becomes the truth and the
later restore is a guarded no-op.
* fix(studio): flashless undo/redo — three full-reload causes in the soft-restore path
Cmd+Z blinked the canvas on essentially every undo. Three independent causes
in applyUndoRestoreToPreview, each sufficient on its own:
1. Master-view path gate: activeCompPath is NULL at the master view, so the
'paths[0] === activeCompPath' eligibility check could never match the
index.html restore and every default-view undo full-reloaded at the first
gate. Normalized to the codebase-wide 'activeCompPath ?? "index.html"'.
2. Nested identity innerHTML check: the diff compared each identified
element's innerHTML, but the composition root wraps every clip — any child
change re-detected at the root rejected the restore. Change detection now
compares only each element's OWN attribute surface; structure/text
integrity is still guaranteed by the normalize-residual whole-doc pass
(text nodes, added/removed elements, and un-identified attrs all remain
after normalization and force the full reload).
3. id-only identity: elements addressed by data-hf-id / selector (no DOM id)
fell outside the diff entirely. Identity is now id OR data-hf-id, with the
live sync resolving either.
Also stop re-running an UNCHANGED GSAP script: attribute-only restores (z,
lane, timing, style — the overwhelmingly common undo) now use the rebind-only
finalization (seek + __hfForceTimelineRebind + manual reapply, zero script
execution — the same path as flashless timing edits), instead of tearing down
and rebuilding live timelines or full-reloading when the script can't be
scoped. A restore whose script text genuinely changed still re-runs it via
applySoftReload, and structural restores (split/delete) still full-reload.
Live-verified on the bed (iframe marker): gap-close undo AND redo both keep
the iframe mounted, live DOM lands on the restored values, disk restored
byte-identically.
* feat(studio): left breathing pad before t=0, double zoom sensitivity again
TRACKS_LEFT_PAD (48px) — the horizontal sibling of TRACKS_TOP_PAD: empty lane
surface between the sticky gutter and the ruler's 00:00 / the first clips,
scrolling WITH the content.
- The lanes and the ruler realize it as a plain flow spacer between the
sticky gutter cell and the time-mapped content div, so every
content-relative computation (clip left = t*pps, beat lines, lane-menu
time, clip drag deltas) is untouched by construction.
- Canvas-space overlays shift by the pad: playhead (getTimelinePlayheadLeft),
gap strips, drop placeholder, snap guide, range highlight, marquee clip
rects, beat SVG; the insert line spans the pad.
- Every pointer->time inverse subtracts it symmetrically: seekFromX, razor,
range/marquee anchors, asset drops, and the zoom-anchor gutter basis; fit
pps and the display width account for the consumed viewport width.
- Live-verified: t=0 clip edge, the 00:00 tick, and the playhead line center
all sit at GUTTER + TRACKS_LEFT_PAD, and a ruler click lands the playhead
center exactly under the pointer.
Also doubles the timeline zoom sensitivity again (user feedback after
feel-testing the first bump): button steps 1.5x/(2/3) -> 2x/0.5, pinch
0.007 -> 0.014.
* fix(studio): left pad renders as true empty space, not lane surface
The pad before t=0 inherited each row's background and bottom border from the
row wrapper, so it read as track lanes. Lane visuals now live on the cells:
the sticky gutter keeps its own separator (header column stays delineated),
the time-mapped content div carries the row background + separator, and the
pad spacer stays transparent — bare shell background, no lines. The
new-track insertion line also starts at the pad's end instead of crossing it.
* fix(studio): no vertical line in the ruler band before 00:00
The ruler corner's right border drew the header-boundary line through the
ruler strip, so the band didn't read as starting at 00:00. Dropped it — the
boundary line belongs to the track rows below; the ruler stays completely
clean from the panel edge to the first tick, matching the empty left pad.
* refactor(studio): remove the timeline z-override badge
User decision: the "z" chip on clips never earned its place — dropped
entirely (timelineZOverride.ts + test deleted, TimelineClip badge rendering
and the zOverrideKeys derivation/threading removed). This also eliminates the
review's D2 finding at the root: the badge's cross-document comparison
(stackingContextId ?? null collides across source files in the expanded view)
produced false positives, and there is no longer a detector to mis-fire.
overlapsInTime/paintsAbove lose their export (the badge was their only
external consumer); the paint-order predicate itself is unchanged.
* fix(studio): collision-free expanded child lanes and host-window gap floors
Review findings D1 (blocker) and 4.
- D1: buildChildElements assigned expanded children synthetic display rows as
`host.track + index` — integers that can EQUAL a real clip's lane in another
file (host on 0 with two children puts child #2 on 1). Lane grouping merges
purely by track number, so the collision fused clips from different source
files into one display lane, and lane-scoped actions (the gap menu) then
batch-persisted a foreign file's clip. Children now take FRACTIONS strictly
between the host's lane and the next integer — structurally unable to
collide with any normalized lane, while still rendering as ordered rows
under the host. Regression test pins the reviewer's exact two-file scenario.
- Finding 4: gap math compacted toward absolute 0, but an expanded child's
display time is host-anchored — close/compact could drag it before its host
window and persist a wrong (even negative) local time. All gap functions
now take a lane FLOOR (laneGapFloor: 0 for ordinary lanes, the children's
expandedParentStart for child lanes — single-origin per lane post-D1),
threaded through the menu model, hover highlights, selected-lane strips,
and both commits. Close-gap shifts clamp at the gap's own left edge.
* fix(studio): scope mirror references, insert writes, and crossed-neighbor identity
Review findings 1, 2, and 3.
- Finding 1: buildTrackInsertEdits normalized the FULL display set and
persisted every shifted clip — writing host-lane numbers into OTHER
composition files when expanded children were showing. The renumber write
set is now the edited element's own source file (the sanctioned multi-write
converges one FILE to lane space, never neighbors' files); foreign clips
keep their authored tracks and re-derive display lanes. The locked-clip
refusal scopes the same way. Expanded-origin elements refuse the insert
outright (a new lane is a host-space renumber, meaningless in the child's
file), and the mirrors restrict an expanded child's lane candidates to its
own siblings' lanes — a sub-comp child still mirrors WITHIN its sub-comp
(persisting the sibling's authored track) but can never land on a host lane
with no same-file occupant. authoredTrackForLane's offset fallback rounds:
fractional synthetic rows must never leak fractions into data-track-index.
- Finding 2: the mirror comparison sets required only sameSourceFile, but a
file can contain several CSS stacking contexts and leaf z is only
comparable within one. Both resolvers now scope by samePaintScope — same
source file AND same stackingContextId (the file check also stops null root
contexts of different files from comparing equal in the expanded view).
- Finding 3: the crossed-neighbor key was derived without selectorIndex, so
duplicate class selectors (.sub) resolved to occurrence 0 — a different
clip. The key now carries getSelectorIndex, matching how z-reorder entries
derive theirs.
* fix(studio): z-to-lane gestures are one serialized transaction gated on durable persists
Review findings 5 and 7.
- Finding 5: commitDomEditPatchBatches resolved successfully even when the
server matched NO patch target — the z write never reached disk (the
preview reloads to reconverge) yet the lane mirror still ran, desyncing
track order from what actually paints. The commit now resolves a durability
report ({allMatched, changed}; the save queue and commit types are generic
over the result), and the mirror phase is skipped on allMatched === false.
- Finding 7: the z persist rides the DOM-edit save queue while the lane move
rides the timeline/SDK path — two queues, so a second rapid gesture's z
write could land BETWEEN the first gesture's z and lane phases. Every
z-to-lane gesture (canvas z-order menu AND Layers-panel drag) now runs
through runZLaneGesture: a single module-level tail that serializes the
COMPLETE two-phase transaction, with unit tests for ordering, the
durability gate, and queue resilience to failed gestures. The timeline
lane-drag's inverse (move-then-z-sync) shares its phases' await ordering
already; cross-gesture serialization for that path is noted as follow-up.
- LayersPanel's pure sort helpers moved to layersPanelSort.ts (600-line cap).
* fix(studio): multi-clip GSAP batch mutations roll back on late failure
Review finding 6. finishGroupTimingGsapFallback mutates files sequentially
per clip; a late per-clip failure left the earlier rewrites on disk with no
aggregate history entry — unreachable by undo. foldGsapMutationIntoHistory
already snapshots every touched path before mutating; on a mutation failure
it now restores each path whose disk content changed (all-or-nothing batch),
reports restore errors without masking the original failure, and rethrows.
Regression test drives a two-clip batch whose second rewrite fails and
asserts the first clip's write is restored byte-identically.
* fix(studio): scope mirror inserts to their lane zone
* fix(studio): unify source-scoped clip identity
* fix(studio): isolate track insert topology
* fix(studio): harden timeline paint synchronization
---------
Co-authored-by: Miguel Angel Simon Sierra <miguel.sierra@heygen.com>
* feat(studio): glue API coexistence layer for the NLE swap
What: extends 21 glue files so the OLD timeline/canvas engine and the NEW
NLE components type-check side by side: playerStore (multi-select setters,
zoom pin, snap toggle, non-reactive scale scratch), drag-state types gain
optional NLE fields, timelineLayout/timelineAssetDrop/timelineEditingHelpers/
timelineEditing/timelineElementHelpers/studioHelpers/assetHelpers gain the
NLE exports, DomEditOverlay + gestures + AssetContextMenu + Timeline props
gain optional callbacks/params, contexts gain *Optional hooks, and
TimelineEditCallbacks.onMoveElements becomes a bivariant method accepting
both engines' change shapes. patchDocumentRootDuration's test rides along.
Why: this is the keystone that dissolves the old "welded glue" problem —
every symbol the NLE components need is ADDED next to what the old engine
still uses, so the engine components and the swaps can land as separate
reviewable PRs.
How: 15 authored intermediate files (main content + additive symbols; no
behavior changes — new fields optional, new callbacks unused until wired)
plus 6 files whose final content is already purely additive. New exports
without consumers yet carry TEMP(studio-dnd) ignoreExports entries, removed
by the app-shell swap.
Test plan: tsc --noEmit in studio + studio-server (verifies BOTH engines
compile); bunx vitest run (full suite green incl. the 6 new
patchDocumentRootDuration tests); fallow audit clean.
* feat(studio): timeline interaction hooks and lanes component (unwired)
What: the timeline-side wiring layer, unwired: TimelineLanes (the lane
renderer driving drag/resize/marquee), timelineMarquee (+tests),
useTimelineStackingSync, useTimelineGeometry, useTimelineEditPinning,
useTimelineEditingDrops.
Why: everything between the pure drag math and <Timeline> itself; the
timeline-glue swap PR then only rewires Timeline/TimelineCanvas onto these.
How: new files, tsc-clean against the coexistence layer. Unwired components
carry TEMP(studio-dnd) entry registrations, removed at the app-shell swap.
Test plan: bunx vitest run timelineMarquee.test.ts; tsc --noEmit; fallow
audit clean.
* feat(studio): NLE shell assembly (unwired)
What: EditorShell (the full editor layout replacing NLELayout +
StudioPreviewArea), TimelinePane (timeline host with sub-comp rebasing) and
useTimelineEditCallbacks (the callback bag bridging store edits to the
timeline), all unwired.
Why: the shell that App swaps to in the final step; reviewing it standalone
keeps that swap PR small.
How: new files against the coexistence layer; TEMP(studio-dnd) entries
until App mounts EditorShell in the app-shell swap.
Test plan: tsc --noEmit; bunx vitest run (suite unchanged); fallow audit
clean.
* feat(studio): timeline glue swap — Timeline/TimelineCanvas onto the NLE engine
What: flips the timeline glue to its final form (23 files): Timeline and
TimelineCanvas rebuilt on TimelineLanes/TimelineOverlays, useTimelineClipDrag
drives preview/commit through the new drag engine, range selection goes
multi-select, playback loop moves to useTimelinePlayerLoop. Deletes the 9
old-engine files this orphans (group drag, marquee selection, snap targets,
layer gutter, selection overlays + their suites) — each is compile- or
gate-forced by this swap, verified by probe.
Why: second swap step; timeline-only, canvas and App untouched.
How: modified files to final content + forced deletions.
playerStore/timelineEditing/timelineCallbacks stay at their coexistence
form until the app swap (the old App still runs on them).
Test plan: tsc --noEmit; bunx vitest run (full suite); fallow audit clean.
* feat(studio): clip thumbnail modules
What: ImageThumbnail (+tests) and thumbnailUtils (+tests) — frame decode
with SVG/AVIF format fallbacks and rounded-corner clipping — plus
VideoThumbnail updates.
Why: the decode layer for timeline clip thumbnails, ahead of the visual
refresh that renders them.
How: new modules + one modified file; purely presentational.
Test plan: bunx vitest run on both test files; tsc --noEmit; fallow audit
clean.
* feat(studio): assets/blocks panel behaviors + preview helpers
What: blocks tab install flow, right-panel and global drag-overlay polish,
music beat analysis and clip-content rendering hooks, and the
preview-helper utilities backing asset preview.
Why: completes the studio NLE stack on top of the visual refresh.
How: modified files only (kept as one PR: splitting further would produce
sub-150-LOC fragments of interdependent panel glue).
Test plan: bunx vitest run studioPreviewHelpers/studioUrlState suites; tsc
--noEmit; fallow audit clean.
* fix(studio): restore timeline playback loop
* fix(studio): restore missing GSAP helpers module
* refactor(studio): split timeline GSAP helpers
* style(studio): keep timeline helper under size limit
* fix(studio): restore timeline overlays module
* fix(studio): remove stale GSAP import
* fix(studio): restore canonical timeline dependencies
* style(studio): format restored timeline helpers
* style(studio): satisfy helper line limit
* fix(studio): repair rebuilt timeline integration
* feat(studio): complete rebuilt NLE cutover
* fix(studio): guard project and timeline race boundaries
* fix(studio): preserve graded resize and crop geometry
* fix(studio): log resize/rotate commit failures, move anchor accumulator to resize-local
* fix(studio): treat duration-0 tweens as static holds and settle resize position before persist
Instant holds (to()/fromTo() with duration 0) were classified as animated
tweens by every commit route, so resizing or rotating them converted the
hold into a corrupt duration-0 keyframes tween (new value at 0%, old at
100%) that GSAP drops; panel edits appended a losing set. A shared
isInstantHold() now routes them through the static replace-in-place path,
and percentage math guards zero-duration windows.
Separately, anchored-corner resizes painted 3-5 frames at the new size but
old position while the offset persist round-tripped the server. The commit
path now applies the corrected GSAP position synchronously before awaiting
the offset persist, mirroring the scale route's settle.
* feat(studio): gesture-transaction seam with commit observability
Introduce runGestureTransaction — one owner for a gesture commit's
settle -> persist -> record lifecycle. It settles the live DOM
synchronously before any async persist, folds every mutation into one
undo entry via a per-transaction coalesceKey, restores pre-gesture state
exactly once on failure, and asserts (dev console) + reports (PostHog:
commit_transaction / commit_invariant_violation / commit_transaction_failed)
that a persist never changes pixels. The box-size resize path is migrated
onto it; the ad hoc per-route coalesceKey/reload handling is removed.
Extract the resize draft-rect math into resizeDraft.ts to keep the
gesture-handler file under the size cap.
Also: keep url_hash telemetry to the route slug only (drop the query
string, which carried the user's selected element id/selector), and gate
the [hf-resize] diagnostics behind localStorage hf-resize-debug so they
ship as opt-in tracing rather than console noise.
* fix(studio): transaction owns the undo label
The coalesced history entry took the last sub-mutation's label, so a
resize surfaced as "Move layer" (the offset persist) in undo/redo. The
seam now stamps tx.label on every wrapped mutation, so the folded entry
reads as the gesture.
* fix(studio): atomic static size/position commits (no data loss)
Static resize/position holds updated an existing set via delete+add — two
undo entries, and a delete that succeeded before a failed add lost the
hold on disk. Use one in-place update-properties mutation when a set
exists (one undo entry, no partial-failure window). The keyframed-hold
heal that can't be expressed as a property update now adds before it
deletes, so any single failure leaves a recoverable duplicate, never a
lost hold. Transaction-owned commits are tracked via a WeakSet so the
heal path never double-wraps an already-wrapped gesture.
* fix(core): restore timed-clip visibility after a forced timeline rebind
__hfForceTimelineRebind force-rendered the re-registered timeline but never
re-ran the per-[data-start] visibility pass, so after undo or soft reload
every clip rendered regardless of its time window until a full page reload.
Extract the visibility loop into syncTimedElementVisibility and call it from
both syncMediaForCurrentState (unchanged) and the rebind.
* fix(studio): atomic z-order/keyframe/split commits, one undo entry each
Three edit-commit paths hardened onto the one-transaction invariant:
- Z-order reorder (useElementLifecycleOps): N per-element writes now fold
into one undo entry (coalesceMs Infinity) and, on a failed persist,
restore already-written files to disk so no partial reorder survives.
- Enable-keyframes (useEnableKeyframes/useGsapKeyframeOps): the intermediate
convert phase no longer full-reloads the preview (skipReload), killing the
black-flash remount; convert + edit share one coalesce key = one undo entry.
- Razor split-all (useRazorSplit): snapshot before the batch and restore on
any failure, so a mid-batch error never leaves un-revertable partial splits.
Shared file-history helpers (RecordEditInput, DomEditCommitBaseParams,
readProjectFileContent, restoreFilesToOriginal) dedupe the rollback/commit
logic across these paths. Commit options thread as one partial object rather
than field-by-field. Test setup extracted into colocated helpers.
* fix(studio): fold multi-step edits into one undo entry; guard text revert
- Gesture recording (useGestureCommit): the per-property-group commits now
share one coalesce key and only the last reloads, so a recording is one
undo entry and one preview reload instead of up to four.
- Delete selected keyframes (deleteSelectedKeyframes, split out of
timelineEditingHelpers): N removals fold into one coalesced undo entry
with a single reload.
- Text-field commit (useDomEditTextCommits): commitDomTextFields now uses
the same version-guarded revert as handleDomTextCommit, so a stale failed
commit can no longer stomp a newer successful one.
* feat(studio): batch a gesture's mutations into one atomic server write
A transaction that emits N mutations previously did N sequential POSTs,
each rewriting the file and soft-reloading — the root of the multi-phase
persist window. Add a gsap-mutations-batch endpoint that validates every
mutation up front, applies them in one in-memory rewrite chain, and writes
the file once (all-or-nothing: an invalid entry rejects the whole batch,
no partial write). The seam buffers a transaction's commits and, when more
than one targets the same file, dispatches a single batch — one write, one
history entry, one reload. The batch capability rides on the existing
commit-function reference; no option fields are threaded through callers.
* fix(studio): soften off-canvas indicator outline to 30% opacity
The dashed off-canvas selection outline at 60% was noisy with many
protruding elements on screen; drop the resting opacity to 30% (hover
still restores full opacity so it stays discoverable).
* fix(studio): drop off-canvas indicator outline to 10% opacity
Follow-up to the 30% softening — 10% resting opacity reads much calmer
with many protruding elements; hover still restores full opacity.
* fix(studio): gate [hf-commit] console traces to dev only
The start/settled/persisted/restore lifecycle traces logged on every
gesture commit in all environments — console noise for end users. Route
them through a dev-only traceCommit helper (matching the pixel-violation
error's existing DEV gate). The commit_* PostHog events stay always on;
they are the production observability, the console lines are a dev aid.
* fix(studio): count actual reloads, not softReload requests, in commit telemetry
A resize's size and offset persists both request softReload; the seam
counted each request, so a batched gesture reported reload_count 2 even
though the batch is one write and one reload. Compute the count from what
dispatchBufferedCommits actually did — one for a batch, the request count
for the sequential fallback.
* fix(studio): rotate hover + off-canvas overlays with the element; flicker-free crop
- Hover overlay applied the element's rotation only to the selection chrome,
not the hover box; it now rotates about center like the selection, via a
shared orientedGroupAwareOverlayRect router (one owner for rotation-aware
overlay geometry across hover/selection/off-canvas).
- Off-canvas indicator was axis-aligned; it now rotates with the element and
inverse-rotates the canvas-exclusion clip into the element's local frame,
so the protruding-sliver clip stays correct for rotated elements.
- Crop commit re-lifted the element only in the commit's .then(), so one
frame painted the cropped state (the flicker). Re-lift synchronously right
after onStyleCommit (which applies the clip before its first await), so the
cropped state never paints; the persisted file value is unchanged.
* fix(studio): address code-review findings across the commit-hardening campaign
Correctness (would ship green, bite under latency):
- Enable-keyframes phase 2 now carries coalesceMs: Infinity, so the convert
folds into one undo entry instead of splitting past the 300ms default.
- The SDK keyframe persist path forwards coalesceMs (CutoverOptions gains the
field); multi-keyframe delete and convert coalesce correctly when SDK-routed.
- Razor split-all's rollback is guarded so a failing restore can't swallow the
error toast that tells the user the split failed.
Simplification (single source of truth / no dead flexibility):
- Decompose resolveResizeDraftRect (drops a fallow-ignore suppression).
- Delegate the third readProjectFileContent copy to the shared helper.
- Inline setPatchFromUpdateProperties (its only caller passes one mutation).
- One toSdkPersistOptions translates gesture overrides to SDK options.
- Bundle the reorder-rollback deps into one object (was 7-9 positional args).
- Dedupe the 'last group reloads' ternary; type gesture options as
CommitMutationOptions; drop a Map+array wrapper around a single write.
* feat(studio): atomic z-order reorder via batch patch-element endpoint
Z-order reorder issued N per-element inline-style patches (one server
write each), so a mid-chain failure could leave a partial reorder on disk.
Add a patch-elements-batch endpoint that validates every patch, folds them
over the file in one in-memory rewrite, and writes once (all-or-nothing;
unsafe input rejects with no write). The reorder now sends one batch per
source file and records one undo entry. Because a failed atomic write
persists nothing, the interim disk-write-back rollback (restoreReorderedFile
/ restoreFulfilledReorderFiles / ReorderRollbackDeps) is deleted — failure
rolls back only live DOM/store state. Closes the last disk-atomicity gap.
* fix(studio): razor-split undo no longer silently no-ops
The split clone was written to disk without a data-hf-id, so the split
endpoint recorded that unstamped HTML as the undo entry's afterHash. The
next reloadPreview() ran the preview route's ensureHfIds write-back, which
minted a fresh id and persisted DIFFERENT bytes — so at undo time the disk
hash no longer matched afterHash and editHistory's content-mismatch guard
silently refused the undo (no write, no network, no error). Stamp the split
output via ensureHfIds in splitElementInHtml before it is written/returned,
so the preview write-back is a no-op and the recorded afterHash always
equals the final on-disk bytes. Fixes at the source rather than relaxing the
mismatch guard. Corrects the stale comment that credited forceReloadSdkSession.
* feat(studio): closed-hand grab cursor on the rotate handle
The rotate handle used the default arrow cursor; show a grabbing
(closed-hand) cursor on hover to signal it's grabbed and dragged to rotate.
* fix(studio): dropping a dragged element over another no longer selects it
A moved drag's release fired the box click, which re-selected whatever now
sat under the pointer via the hover cache — so dropping an element over a
higher-z one selected the drop target instead of keeping the dragged
element selected. The drag-move branch now suppresses the next box click,
mirroring the resize branch.
* fix(studio): group drag is one undo entry, not one per element
Dragging a multi-selected group committed each member's position write as
its own undo entry, so reverting took N Cmd+Z presses. Force a shared
coalesceKey (infinite window) across every member's commit so they fold
into a single undo entry, like the other multi-step commit paths.
* fix(studio): undo of a split no longer leaves a ghost clip in the timeline
The file and the composition iframe revert correctly on undo, but the
timeline panel kept a ghost node for the split clone. The element-merge
that repopulates the timeline preserves elements the fresh scan dropped —
intended for enriched sub-composition children a bare DOM re-scan misses,
but it also preserved a genuinely-removed TOP-LEVEL element (the split
clone after undo), leaving a phantom clip. Restrict the preserve to
elements with a compositionSrc (the enriched sub-comp children); a
top-level element missing from the fresh scan was truly removed.
---------
Co-authored-by: ukimsanov <ular.kimsanov@heygen.com>
What: the studio-server files route at its final NLE-stack form, with its
test suite (25 tests).
Why: standalone package seam — the server-side dependency of the studio
asset workflow, reviewable in isolation.
How: additive route behavior; existing route consumers unchanged.
Test plan: bunx vitest run src/routes/files.test.ts in packages/studio-server;
tsc --noEmit in packages/studio-server; fallow audit clean.
Ninth PR of the template-variables stack: the promote-a-property gesture.
Select an element on the canvas/timeline, open the Variables tab, and the
panel offers per-property bind actions.
- "Bind selected" card in the Variables panel, built from the selection:
image/media source (img/video/audio), text, text color, background, and
font. Each action declares a variable whose default is the element's
CURRENT value (promoting never changes the render — computed rgb colors
convert to hex, the first computed font family becomes the font default)
and writes the declarative binding the runtime resolves: data-var-src /
data-var-text attributes or `<prop>: var(--id)` styles. Declare + bind
run as one batched schema edit (one undo step); binding to an
already-declared id skips the declare and just binds.
- guarded to selections from the composition the session models — a
selection in another source file never writes bindings into this one.
- core: extract readVariablesForElement into runtime/variableScope.ts,
shared by color grading and the declarative bindings (was duplicated).
- fix(studio-server): buildSubCompositionHtml's extractElementAttrs
rebuilt html/body attributes without HTML-escaping values, shredding
quote-bearing attributes — data-composition-variables (a JSON array)
came out as mangled bogus attributes, so getVariables() silently
returned {} on every /preview/comp/* page (no declared defaults, no
runtime bindings). Pre-existing bug surfaced by live-testing this
feature; regression test added.
Verified end-to-end in a live session: select headline → Bind text color
→ declaration + var(--headline-color) written to disk → override in the
panel → runtime applies the custom prop and the element renders the
override.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Fourth PR of the template-variables Studio stack — the HTTP plumbing.
- preview routes (/preview and /preview/comp/*) accept
?variables=<url-encoded json> and inject
`window.__hfVariables = {...}` into <head>, before the runtime and any
composition script — the exact global the engine sets via
evaluateOnNewDocument at render time, so preview-with-values cannot
diverge from render output. Values are escaped against </script>
breakout, malformed payloads 400 instead of silently previewing
defaults, and the ETag is salted with a hash of the payload so cached
previews revalidate when values change.
- POST /projects/:id/render accepts variables ({variableId: value}) and
forwards them through StudioApiAdapter.startRender into the producer's
RenderConfig.variables — the same channel `hyperframes render
--variables` uses. Wired in both adapters (CLI embedded server + vite
dev adapter).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Documents the shared-pattern context (3rd copy of "resolve relative
data-start", after runtime startResolver.ts and the SDK's own
getElementTimings) and explains when the raw parseFloat fallback in
resolveStart's else branch can actually fire (a malformed grammar string
with a leading number). Adds a test pinning the "reference target exists
but its own timing is unresolvable" branch, which existing tests didn't
cover (only "target doesn't exist" was tested).
Cross-checked the negative-offset clamp concern raised in review: the
SDK's own resolveReferenceStart (session.ts) also clamps to
Math.max(0, ...), so this stays consistent with its sibling — no code
change needed there.
Same bug class as the SDK's getElementTimings fix (#2092): data-start can be a
relative-reference expression ("intro", "intro + 2"), not just an absolute
number. The old code did a raw parseFloat on it, so any reference silently
resolved to undefined instead of an actual time.
Also: this function never read data-duration at all (only data-start/data-end
literally), so a reference to a duration-authored (not end-authored) clip was
unresolvable regardless of the parseFloat bug — resolving a reference needs
the target's END, which for a duration-authored clip requires start+duration.
Both fixed together via the shared parseStartExpression grammar parser
(@hyperframes/core/runtime/start-expression), with the same cycle-guard
pattern as the SDK fix. Reference resolution against other elements is scoped
to this file's existing findById (bare data-hf-id lookup).
6 new tests: duration-based end resolution, relative reference (with and
without offset), missing target, and a mutual-cycle termination check.
Extending a clip past the video end used to force the server-fallback
path that fully remounts the preview iframe (the SDK fast path can't
express the root composition's data-duration, and the runtime bakes+drops
data-duration at load so it can't be patched live). On a large comp that
remount is a visible hitch.
Add a runtime control-bridge action set-root-duration -> clock.setDuration,
so the studio can grow the transport length in place. On an extend the
studio now posts it (and patches the clip's own timing live) instead of
reloading; it only reloads when a GSAP source rewrite actually happened
(the gsap-mutation endpoints now report a mutated flag). Non-animated
extends — the common case — commit as fast as a normal edit.
Verified: bridge dispatch + studio no-reload/post-message paths unit-
tested; core/studio/studio-server typecheck + suites green; the built
runtime artifact carries the handler; E2E confirms the extend no longer
remounts the preview and still persists.
Timeline UI
- Highlight clips visible at the playhead in the primary color; others share one neutral color
- Minimalist rounded clips, single-color track rows, no gutter icons or superscript labels
- Per-track eye toggle and a per-element hide button in the design panel
- Ruler zoom fixes: sub-second tick intervals and correct label formatting at high zoom
- Sticky gutter so track controls stay visible while scrolling
WYSIWYG visibility (data-hidden)
- Runtime honors data-hidden (display:none), so hiding affects the render, not just the preview
- HTML stays the source of truth; hide state persists and round-trips on reload
Split several studio files to stay under the 600-line cap; pure relocations, no behavior change.
* fix(parsers,sdk,studio-server,studio): unify hf-id space across preview, disk, and SDK session
Root-causes the setTiming element_not_found resolver-shadow divergence class:
timeline edits carry hf-ids read from the live preview DOM, but the preview
minted ids AFTER rewriting attributes (and never persisted them for sub-comps),
while the SDK session mints from the raw file — content-keyed minting then
yields different ids for the same element. Template-based comps were worse:
the SDK excluded the whole <template> subtree, so the session had zero
elements and every edit diverged.
- parsers: ensureHfIds now descends into <template> subtrees (linkedom's
querySelectorAll does not), minting and pinning inner ids
- sdk: buildRoots/buildElement treat <template> as a transparent container,
and resolution (resolveScoped, animation-id map) searches template subtrees
via querySelectorAllDeep — template comps now model, resolve, and edit
- studio-server: the sub-comp preview route persists hf-ids to the raw file
BEFORE the rewrite pipeline (mirrors the main route), pinning one id space
across served DOM, disk, and SDK session
- studio: resolver-shadow skips structurally-empty sessions (no event, no
attempt) and tags fail-open emissions with sourceReadFailed so read errors
are distinguishable from unwired readers in telemetry
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix(parsers,sdk,studio-server,studio): scope template descent, guard persist route
Addresses the 10 verified findings from the PR #1981 review:
- Restrict template transparency to COMPOSITION templates
(<template data-composition-id>) everywhere — ensureHfIds, SDK
buildChildren, querySelectorAllDeep. A plain <template> (runtime
clone-source) keeps its old fully-excluded behavior: stamping its
interior would duplicate one persisted id across every runtime clone,
and modeling it would show phantom timeline clips.
- Guard the sub-comp persist: only .html files (the wildcard route can
serve any project path — stamping an SVG corrupted it on disk),
try/catch the read (file-removed race becomes 404, not 500), salt the
etag (v2) so pre-fix cached clients don't 304 past the id pin, and
thread the stamped content into buildSubCompositionHtml so served ids
match the mint even when the disk write is skipped.
- Rewrite querySelectorAllDeep as a document-order DOM walk — appending
template matches after top-level matches made duplicate-id tiebreaks
disagree with the preview's unwrapped DOM (wrong-element edits).
- Recurse sourceMutation.querySelectorAllWithTemplates so server-side
ops resolve ids at any template depth, matching SDK resolution.
- Replace the empty-session silent skip with ONE tagged session_empty
event per session — silence would blind the tripwire to exactly the
modeling-gap class that exposed the template bug. Attempts stay
uncounted (an unmodelable comp can't cut over).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix(studio-server): close TOCTOU in sub-comp hf-id persist (CodeQL js/file-system-race)
Replace the route-level stat/read/persist sequence with stampFileHfIds:
validation (fstat), read, mint, and write-back all go through ONE open
file descriptor (O_NOFOLLOW where supported), so the path cannot be
swapped between validation and write. Falls back to read-only stamping
when the file isn't writable — content-keyed minting means the SDK
derives the same ids from the same bytes even without the disk write.
Addresses miguel-heygen's blocking review on PR #1981.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix(studio-server): linear-time template-attr match (CodeQL js/polynomial-redos)
promoteTemplateCompositionId's single-pattern regex backtracked
polynomially on crafted input. Two-step match: grab each <template>
open tag linearly, then find data-composition-id within that short
tag text. Same semantics (first template carrying the attr wins).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
* test(studio): add design-panel QA fixture and triage matrix
Fixture project covering all panel-editable element archetypes,
plus the QA findings matrix from the design-panel bug campaign.
* fix(studio): make canvas selection hit intended elements
- honor author pointer-events:none in hit-testing (was selecting invisible overlays)
- pause playback before mousedown sampling; fall back to hover selection on null resolve
- invalidate committed selection when the active composition changes
- double-click keeps selection and defers to multi-candidate click cycling
* fix(studio): close remaining selection-layer review findings
- hoverSelection fallback now wired at all 3 mousedown call sites (box-click,
blocked-drag, plain overlay click) instead of just the overlay path
- pointer-events override detection reads computed style, not inline style,
so a CSS-class opt-in (not just inline style=) on a descendant is honored
- defensively remove the pointer-events override before the group-fallback
check too, closing a theoretical gap in the no-elementsFromPoint branch
- a click that resolves to nothing (dead-zone / deselect) no longer leaves
playback paused if it was already playing
* fix(studio-server): child-scoped patch operations with batch abort
- PatchOperation gains optional childSelector/childIndex resolved under the matched parent
- pre-pass resolves every op target; any miss aborts the batch with matched:false, no partial write
- style-decl parsing extracted to sourceStyleMutation to stay under the file-size cap
- new ./source-mutation subpath export (mirrors ./finite-mutation)
Miguel Ángel