From ac43a5a73fa905cdac905bc956763b6093d6738e Mon Sep 17 00:00:00 2001
From: Maze Winther <mazewinther@gmail.com>
Date: Wed, 15 Apr 2026 05:43:29 +0200
Subject: feat: move/resize multiple elements

---
 .../editor/panels/timeline/timeline-track.tsx      | 261 +++++++++++----------
 1 file changed, 132 insertions(+), 129 deletions(-)

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

diff --git a/apps/web/src/components/editor/panels/timeline/timeline-track.tsx b/apps/web/src/components/editor/panels/timeline/timeline-track.tsx
index 888e1496..32b1b93d 100644
--- a/apps/web/src/components/editor/panels/timeline/timeline-track.tsx
+++ b/apps/web/src/components/editor/panels/timeline/timeline-track.tsx
@@ -1,129 +1,132 @@
-"use client";
-
-import { useElementSelection } from "@/hooks/timeline/element/use-element-selection";
-import { TimelineElement } from "./timeline-element";
-import type { TimelineTrack } from "@/lib/timeline";
-import type { TimelineElement as TimelineElementType } from "@/lib/timeline";
-import type { SnapPoint } from "@/lib/timeline/snap-utils";
-import { TIMELINE_LAYERS } from "./layers";
-import { BASE_TIMELINE_PIXELS_PER_SECOND } from "@/lib/timeline/scale";
-import { useEdgeAutoScroll } from "@/hooks/timeline/use-edge-auto-scroll";
-import type { ElementDragState } from "@/lib/timeline";
-import { useEditor } from "@/hooks/use-editor";
-
-interface TimelineTrackContentProps {
-	track: TimelineTrack;
-	zoomLevel: number;
-	dragState: ElementDragState;
-	rulerScrollRef: React.RefObject<HTMLDivElement | null>;
-	tracksScrollRef: React.RefObject<HTMLDivElement | null>;
-	lastMouseXRef: React.RefObject<number>;
-	onSnapPointChange?: (snapPoint: SnapPoint | null) => void;
-	onResizeStateChange?: (params: { isResizing: boolean }) => void;
-	onElementMouseDown: (params: {
-		event: React.MouseEvent;
-		element: TimelineElementType;
-		track: TimelineTrack;
-	}) => void;
-	onElementClick: (params: {
-		event: React.MouseEvent;
-		element: TimelineElementType;
-		track: TimelineTrack;
-	}) => void;
-	onTrackMouseDown?: (event: React.MouseEvent) => void;
-	onTrackMouseUp?: (event: React.MouseEvent) => void;
-	shouldIgnoreClick?: () => boolean;
-	targetElementId?: string | null;
-}
-
-export function TimelineTrackContent({
-	track,
-	zoomLevel,
-	dragState,
-	rulerScrollRef,
-	tracksScrollRef,
-	lastMouseXRef,
-	onSnapPointChange,
-	onResizeStateChange,
-	onElementMouseDown,
-	onElementClick,
-	onTrackMouseDown,
-	onTrackMouseUp,
-	shouldIgnoreClick,
-	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">
-			<button
-				type="button"
-				className="absolute inset-0 m-0 size-full appearance-none border-0 bg-transparent p-0"
-				aria-label={`Select ${track.name} track`}
-			onMouseUp={(event) => {
-					if (shouldIgnoreClick?.()) return;
-				onTrackMouseUp?.(event);
-				}}
-				onMouseDown={(event) => {
-					event.preventDefault();
-					onTrackMouseDown?.(event);
-				}}
-			/>
-			{/* biome-ignore lint/a11y/noStaticElementInteractions: empty track area is a pointer-only seek surface */}
-			<div
-				className="relative h-full min-w-full"
-				style={{ zIndex: TIMELINE_LAYERS.trackContent }}
-				onMouseUp={(event) => {
-					if (event.target !== event.currentTarget) return;
-					if (shouldIgnoreClick?.()) return;
-					onTrackMouseUp?.(event);
-				}}
-				onMouseDown={(event) => {
-					if (event.target !== event.currentTarget) return;
-					event.preventDefault();
-					onTrackMouseDown?.(event);
-				}}
-			>
-				{track.elements.length === 0 ? (
-					<div className="text-muted-foreground border-muted/30 pointer-events-none flex size-full items-center justify-center rounded-sm border-2 border-dashed text-xs" />
-				) : (
-					track.elements.map((element) => {
-						const isSelected = isElementSelected({
-							trackId: track.id,
-							elementId: element.id,
-						});
-
-						return (
-							<TimelineElement
-								key={element.id}
-								element={element}
-								track={track}
-								zoomLevel={zoomLevel}
-								isSelected={isSelected}
-								onSnapPointChange={onSnapPointChange}
-								onResizeStateChange={onResizeStateChange}
-								onElementMouseDown={(event, element) =>
-									onElementMouseDown({ event, element, track })
-								}
-								onElementClick={(event, element) =>
-									onElementClick({ event, element, track })
-								}
-								dragState={dragState}
-								isDropTarget={element.id === targetElementId}
-							/>
-						);
-					})
-				)}
-			</div>
-		</div>
-	);
-}
+"use client";
+
+import { useElementSelection } from "@/hooks/timeline/element/use-element-selection";
+import { TimelineElement } from "./timeline-element";
+import type { TimelineTrack } from "@/lib/timeline";
+import type { TimelineElement as TimelineElementType } from "@/lib/timeline";
+import { TIMELINE_LAYERS } from "./layers";
+import { BASE_TIMELINE_PIXELS_PER_SECOND } from "@/lib/timeline/scale";
+import { useEdgeAutoScroll } from "@/hooks/timeline/use-edge-auto-scroll";
+import type { ElementDragState } from "@/lib/timeline";
+import { useEditor } from "@/hooks/use-editor";
+
+interface TimelineTrackContentProps {
+	track: TimelineTrack;
+	zoomLevel: number;
+	dragState: ElementDragState;
+	rulerScrollRef: React.RefObject<HTMLDivElement | null>;
+	tracksScrollRef: React.RefObject<HTMLDivElement | null>;
+	lastMouseXRef: React.RefObject<number>;
+	onResizeStart: (params: {
+		event: React.MouseEvent;
+		element: TimelineElementType;
+		track: TimelineTrack;
+		side: "left" | "right";
+	}) => void;
+	onElementMouseDown: (params: {
+		event: React.MouseEvent;
+		element: TimelineElementType;
+		track: TimelineTrack;
+	}) => void;
+	onElementClick: (params: {
+		event: React.MouseEvent;
+		element: TimelineElementType;
+		track: TimelineTrack;
+	}) => void;
+	onTrackMouseDown?: (event: React.MouseEvent) => void;
+	onTrackMouseUp?: (event: React.MouseEvent) => void;
+	shouldIgnoreClick?: () => boolean;
+	targetElementId?: string | null;
+}
+
+export function TimelineTrackContent({
+	track,
+	zoomLevel,
+	dragState,
+	rulerScrollRef,
+	tracksScrollRef,
+	lastMouseXRef,
+	onResizeStart,
+	onElementMouseDown,
+	onElementClick,
+	onTrackMouseDown,
+	onTrackMouseUp,
+	shouldIgnoreClick,
+	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">
+			<button
+				type="button"
+				className="absolute inset-0 m-0 size-full appearance-none border-0 bg-transparent p-0"
+				aria-label={`Select ${track.name} track`}
+				onMouseUp={(event) => {
+					if (shouldIgnoreClick?.()) return;
+					onTrackMouseUp?.(event);
+				}}
+				onMouseDown={(event) => {
+					event.preventDefault();
+					onTrackMouseDown?.(event);
+				}}
+			/>
+			{/* biome-ignore lint/a11y/noStaticElementInteractions: empty track area is a pointer-only seek surface */}
+			<div
+				className="relative h-full min-w-full"
+				style={{ zIndex: TIMELINE_LAYERS.trackContent }}
+				onMouseUp={(event) => {
+					if (event.target !== event.currentTarget) return;
+					if (shouldIgnoreClick?.()) return;
+					onTrackMouseUp?.(event);
+				}}
+				onMouseDown={(event) => {
+					if (event.target !== event.currentTarget) return;
+					event.preventDefault();
+					onTrackMouseDown?.(event);
+				}}
+			>
+				{track.elements.length === 0 ? (
+					<div className="text-muted-foreground border-muted/30 pointer-events-none flex size-full items-center justify-center rounded-sm border-2 border-dashed text-xs" />
+				) : (
+					track.elements.map((element) => {
+						const isSelected = isElementSelected({
+							trackId: track.id,
+							elementId: element.id,
+						});
+
+						return (
+							<TimelineElement
+								key={element.id}
+								element={element}
+								track={track}
+								zoomLevel={zoomLevel}
+								isSelected={isSelected}
+								onResizeStart={({ event, element, side }) =>
+									onResizeStart({ event, element, track, side })
+								}
+								onElementMouseDown={(event, element) =>
+									onElementMouseDown({ event, element, track })
+								}
+								onElementClick={(event, element) =>
+									onElementClick({ event, element, track })
+								}
+								dragState={dragState}
+								isDropTarget={element.id === targetElementId}
+							/>
+						);
+					})
+				)}
+			</div>
+		</div>
+	);
+}
-- 
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