From 6a22a3ecbdff2d0e6a4c24c8db40bb86bc01b692 Mon Sep 17 00:00:00 2001
From: Maze Winther <mazewinther@gmail.com>
Date: Sat, 25 Apr 2026 03:56:22 +0200
Subject: refactor: centralize editor interaction state

Move timeline and preview gestures into dedicated controllers so hooks stay thin around editor state and DOM events.

This also routes drag and playback synchronization through manager APIs and reuses persistent wasm surfaces so scrubbing, seeking, and preview rendering stay in sync.

Made-with: Cursor
---
 .../web/src/timeline/components/timeline-track.tsx | 26 ++++------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

(limited to 'apps/web/src/timeline/components/timeline-track.tsx')

diff --git a/apps/web/src/timeline/components/timeline-track.tsx b/apps/web/src/timeline/components/timeline-track.tsx
index 6c40637e..7608e6df 100644
--- a/apps/web/src/timeline/components/timeline-track.tsx
+++ b/apps/web/src/timeline/components/timeline-track.tsx
@@ -5,18 +5,12 @@ import { TimelineElement } from "./timeline-element";
 import type { TimelineTrack } from "@/timeline";
 import type { TimelineElement as TimelineElementType } from "@/timeline";
 import { TIMELINE_LAYERS } from "./layers";
-import { BASE_TIMELINE_PIXELS_PER_SECOND } from "@/timeline/scale";
-import { useEdgeAutoScroll } from "@/timeline/hooks/use-edge-auto-scroll";
-import type { ElementDragState } from "@/timeline";
-import { useEditor } from "@/editor/use-editor";
+import type { ElementDragView } from "@/timeline";
 
 interface TimelineTrackContentProps {
 	track: TimelineTrack;
 	zoomLevel: number;
-	dragState: ElementDragState;
-	rulerScrollRef: React.RefObject<HTMLDivElement | null>;
-	tracksScrollRef: React.RefObject<HTMLDivElement | null>;
-	lastMouseXRef: React.RefObject<number>;
+	dragView: ElementDragView;
 	onResizeStart: (params: {
 		event: React.MouseEvent;
 		element: TimelineElementType;
@@ -42,10 +36,7 @@ interface TimelineTrackContentProps {
 export function TimelineTrackContent({
 	track,
 	zoomLevel,
-	dragState,
-	rulerScrollRef,
-	tracksScrollRef,
-	lastMouseXRef,
+	dragView,
 	onResizeStart,
 	onElementMouseDown,
 	onElementClick,
@@ -55,15 +46,6 @@ export function TimelineTrackContent({
 	targetElementId = null,
 }: TimelineTrackContentProps) {
 	const { isElementSelected } = useElementSelection();
-	const duration = useEditor((e) => e.timeline.getTotalDuration());
-
-	useEdgeAutoScroll({
-		isActive: dragState.isDragging,
-		getMouseClientX: () => lastMouseXRef.current ?? 0,
-		rulerScrollRef,
-		tracksScrollRef,
-		contentWidth: duration * BASE_TIMELINE_PIXELS_PER_SECOND * zoomLevel,
-	});
 
 	return (
 		<div className="relative size-full">
@@ -120,7 +102,7 @@ export function TimelineTrackContent({
 								onElementClick={(event, element) =>
 									onElementClick({ event, element, track })
 								}
-								dragState={dragState}
+								dragView={dragView}
 								isDropTarget={element.id === targetElementId}
 							/>
 						);
-- 
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