From 3e89d2998588f8e35c524e523ba2ee853f0f6475 Mon Sep 17 00:00:00 2001
From: Maze Winther <mazewinther@gmail.com>
Date: Mon, 20 Apr 2026 11:31:17 +0200
Subject: refactor: restructure files to their domains,  new preview overlay
 system, and dep graph

---
 apps/web/src/timeline/drag-utils.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 apps/web/src/timeline/drag-utils.ts

(limited to 'apps/web/src/timeline/drag-utils.ts')

diff --git a/apps/web/src/timeline/drag-utils.ts b/apps/web/src/timeline/drag-utils.ts
new file mode 100644
index 00000000..a731d7a0
--- /dev/null
+++ b/apps/web/src/timeline/drag-utils.ts
@@ -0,0 +1,21 @@
+import { BASE_TIMELINE_PIXELS_PER_SECOND } from "@/timeline/scale";
+import { TICKS_PER_SECOND } from "@/wasm";
+
+export function getMouseTimeFromClientX({
+	clientX,
+	containerRect,
+	zoomLevel,
+	scrollLeft,
+}: {
+	clientX: number;
+	containerRect: DOMRect;
+	zoomLevel: number;
+	scrollLeft: number;
+}): number {
+	const mouseX = clientX - containerRect.left + scrollLeft;
+	const seconds = Math.max(
+		0,
+		mouseX / (BASE_TIMELINE_PIXELS_PER_SECOND * zoomLevel),
+	);
+	return Math.round(seconds * TICKS_PER_SECOND);
+}
-- 
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