1 files changed, 283 insertions, 0 deletions
diff --git a/apps/web/src/components/editor/panels/preview/transform-handles.tsx b/apps/web/src/components/editor/panels/preview/transform-handles.tsx
new file mode 100644
index 00000000..976c3019
--- /dev/null
+++ b/apps/web/src/components/editor/panels/preview/transform-handles.tsx
@@ -0,0 +1,283 @@
+"use client";
+
+import { useTransformHandles } from "@/hooks/use-transform-handles";
+import { useEditor } from "@/hooks/use-editor";
+import { isVisualElement } from "@/lib/timeline/element-utils";
+import { SnapGuides } from "./snap-guides";
+import { canvasToOverlay, getDisplayScale } from "@/lib/preview/preview-coords";
+import type { ElementBounds } from "@/lib/preview/element-bounds";
+import { cn } from "@/utils/ui";
+import { HugeiconsIcon } from "@hugeicons/react";
+import { Rotate01Icon } from "@hugeicons/core-free-icons";
+
+const HANDLE_SIZE = 10;
+const ROTATION_HANDLE_OFFSET = 24;
+const ROTATION_HANDLE_RADIUS = 10;
+const CORNER_HIT_AREA_SIZE = 18;
+
+type Corner = "top-left" | "top-right" | "bottom-left" | "bottom-right";
+const CORNERS: Corner[] = [
+	"top-left",
+	"top-right",
+	"bottom-left",
+	"bottom-right",
+];
+
+function getCornerPosition({
+	bounds,
+	corner,
+}: {
+	bounds: ElementBounds;
+	corner: Corner;
+}): { x: number; y: number } {
+	const halfW = bounds.width / 2;
+	const halfH = bounds.height / 2;
+	const angleRad = (bounds.rotation * Math.PI) / 180;
+	const cos = Math.cos(angleRad);
+	const sin = Math.sin(angleRad);
+
+	const localX =
+		corner === "top-left" || corner === "bottom-left" ? -halfW : halfW;
+	const localY =
+		corner === "top-left" || corner === "top-right" ? -halfH : halfH;
+
+	return {
+		x: bounds.cx + (localX * cos - localY * sin),
+		y: bounds.cy + (localX * sin + localY * cos),
+	};
+}
+
+function getRotationHandlePosition({ bounds }: { bounds: ElementBounds }): {
+	x: number;
+	y: number;
+} {
+	const angleRad = (bounds.rotation * Math.PI) / 180;
+	const cos = Math.cos(angleRad);
+	const sin = Math.sin(angleRad);
+	const localY = -bounds.height / 2 - ROTATION_HANDLE_OFFSET;
+	return {
+		x: bounds.cx - localY * sin,
+		y: bounds.cy + localY * cos,
+	};
+}
+
+function getOverlayContext({
+	canvasRef,
+	containerRef,
+}: {
+	canvasRef: React.RefObject<HTMLCanvasElement | null>;
+	containerRef: React.RefObject<HTMLDivElement | null>;
+}): {
+	canvasRect: DOMRect;
+	containerRect: DOMRect;
+} | null {
+	const canvasRect = canvasRef.current?.getBoundingClientRect();
+	const containerRect = containerRef.current?.getBoundingClientRect();
+	if (!canvasRect || !containerRect) return null;
+	return { canvasRect, containerRect };
+}
+
+export function TransformHandles({
+	canvasRef,
+	containerRef,
+}: {
+	canvasRef: React.RefObject<HTMLCanvasElement | null>;
+	containerRef: React.RefObject<HTMLDivElement | null>;
+}) {
+	const {
+		selectedWithBounds,
+		hasVisualSelection,
+		snapLines,
+		handleCornerPointerDown,
+		handleRotationPointerDown,
+		handlePointerMove,
+		handlePointerUp,
+	} = useTransformHandles({ canvasRef });
+
+	const editor = useEditor();
+	const canvasSize = editor.project.getActive().settings.canvasSize;
+
+	if (!hasVisualSelection || !selectedWithBounds) return null;
+
+	const overlayContext = getOverlayContext({ canvasRef, containerRef });
+	if (!overlayContext) return null;
+
+	const { bounds, element } = selectedWithBounds;
+	if (!isVisualElement(element)) return null;
+
+	const { canvasRect, containerRect } = overlayContext;
+	const displayScale = getDisplayScale({ canvasRect, canvasSize });
+
+	const toOverlay = ({
+		canvasX,
+		canvasY,
+	}: {
+		canvasX: number;
+		canvasY: number;
+	}) =>
+		canvasToOverlay({
+			canvasX,
+			canvasY,
+			canvasRect,
+			containerRect,
+			canvasSize,
+		});
+
+	const center = toOverlay({ canvasX: bounds.cx, canvasY: bounds.cy });
+	const outlineWidth = bounds.width * displayScale.x;
+	const outlineHeight = bounds.height * displayScale.y;
+
+	const rotationHandle = getRotationHandlePosition({ bounds });
+	const rotationHandleScreen = toOverlay({
+		canvasX: rotationHandle.x,
+		canvasY: rotationHandle.y,
+	});
+
+	return (
+		<div className="pointer-events-none absolute inset-0" aria-hidden>
+			<SnapGuides
+				lines={snapLines}
+				canvasRef={canvasRef}
+				containerRef={containerRef}
+			/>
+			<BoundingBoxOutline
+				center={center}
+				outlineWidth={outlineWidth}
+				outlineHeight={outlineHeight}
+				rotation={bounds.rotation}
+			/>
+			{CORNERS.map((corner) => {
+				const cornerPosition = getCornerPosition({ bounds, corner });
+				const screen = toOverlay({
+					canvasX: cornerPosition.x,
+					canvasY: cornerPosition.y,
+				});
+				return (
+					<CornerHandle
+						key={corner}
+						corner={corner}
+						screen={screen}
+						onPointerDown={(event) =>
+							handleCornerPointerDown({ event, corner })
+						}
+						onPointerMove={(event) => handlePointerMove({ event })}
+						onPointerUp={(event) => handlePointerUp({ event })}
+					/>
+				);
+			})}
+			<RotationHandle
+				screen={rotationHandleScreen}
+				onPointerDown={(event) => handleRotationPointerDown({ event })}
+				onPointerMove={(event) => handlePointerMove({ event })}
+				onPointerUp={(event) => handlePointerUp({ event })}
+			/>
+		</div>
+	);
+}
+
+function BoundingBoxOutline({
+	center,
+	outlineWidth,
+	outlineHeight,
+	rotation,
+}: {
+	center: { x: number; y: number };
+	outlineWidth: number;
+	outlineHeight: number;
+	rotation: number;
+}) {
+	return (
+		<div
+			className="pointer-events-none absolute"
+			style={{
+				left: center.x - outlineWidth / 2,
+				top: center.y - outlineHeight / 2,
+				width: outlineWidth,
+				height: outlineHeight,
+				transform: `rotate(${rotation}deg)`,
+				transformOrigin: "center center",
+				border: "1px solid white",
+				boxSizing: "border-box",
+				opacity: 0.75,
+			}}
+		/>
+	);
+}
+
+function CornerHandle({
+	corner,
+	screen,
+	onPointerDown,
+	onPointerMove,
+	onPointerUp,
+}: {
+	corner: Corner;
+	screen: { x: number; y: number };
+	onPointerDown: (event: React.PointerEvent) => void;
+	onPointerMove: (event: React.PointerEvent) => void;
+	onPointerUp: (event: React.PointerEvent) => void;
+}) {
+	const isNesw = corner === "top-right" || corner === "bottom-left";
+
+	return (
+		<button
+			type="button"
+			className={cn(
+				"absolute flex items-center justify-center outline-none",
+				isNesw ? "cursor-nesw-resize" : "cursor-nwse-resize",
+			)}
+			style={{
+				left: screen.x - CORNER_HIT_AREA_SIZE / 2,
+				top: screen.y - CORNER_HIT_AREA_SIZE / 2,
+				width: CORNER_HIT_AREA_SIZE,
+				height: CORNER_HIT_AREA_SIZE,
+				pointerEvents: "auto",
+			}}
+			onPointerDown={onPointerDown}
+			onPointerMove={onPointerMove}
+			onPointerUp={onPointerUp}
+			onPointerLeave={onPointerUp}
+			onKeyDown={(event) => event.key === "Enter" && event.preventDefault()}
+			onKeyUp={(event) => event.key === "Enter" && event.preventDefault()}
+		>
+			<div
+				className="rounded-sm bg-white"
+				style={{ width: HANDLE_SIZE, height: HANDLE_SIZE }}
+			/>
+		</button>
+	);
+}
+
+function RotationHandle({
+	screen,
+	onPointerDown,
+	onPointerMove,
+	onPointerUp,
+}: {
+	screen: { x: number; y: number };
+	onPointerDown: (event: React.PointerEvent) => void;
+	onPointerMove: (event: React.PointerEvent) => void;
+	onPointerUp: (event: React.PointerEvent) => void;
+}) {
+	return (
+		<button
+			type="button"
+			className="absolute flex items-center justify-center rounded-full bg-white text-black shadow-sm outline-none"
+			style={{
+				left: screen.x - ROTATION_HANDLE_RADIUS,
+				top: screen.y - ROTATION_HANDLE_RADIUS,
+				width: ROTATION_HANDLE_RADIUS * 2,
+				height: ROTATION_HANDLE_RADIUS * 2,
+				pointerEvents: "auto",
+			}}
+			onPointerDown={onPointerDown}
+			onPointerMove={onPointerMove}
+			onPointerUp={onPointerUp}
+			onPointerLeave={onPointerUp}
+			onKeyDown={(event) => event.key === "Enter" && event.preventDefault()}
+			onKeyUp={(event) => event.key === "Enter" && event.preventDefault()}
+		>
+			<HugeiconsIcon icon={Rotate01Icon} className="size-3" strokeWidth={2.5} />
+		</button>
+	);
+}