Fix clip cut deletion and preview playback

src/components/video-editor/audio/useAudioPreviewSync.test.ts

@@ -53,6 +53,17 @@ describe("source preview playback ownership", () => {
 			delay: 0,
 			plays: true,
 		},
+		{
+			name: "source seek pending",
+			muted: false,
+			playing: true,
+			rate: 1,
+			time: 1,
+			delay: 0,
+			seeking: true,
+			wasPlaying: true,
+			plays: false,
+		},
 		{
 			name: "gap or muted clip",
 			muted: true,
@@ -105,6 +116,8 @@ describe("source preview playback ownership", () => {
 		time,
 		delay,
 		plays,
+		seeking,
+		wasPlaying,
 	}) => {
 		const audio = {
 			src: "",
@@ -113,10 +126,16 @@ describe("source preview playback ownership", () => {
 			currentTime: 0,
 			playbackRate: 1,
 			paused: true,
+			seeking: seeking ?? false,
 			volume: 1,
 			load: vi.fn(),
-			pause: vi.fn(),
-			play: vi.fn().mockResolvedValue(undefined),
+			pause: vi.fn(() => {
+				audio.paused = true;
+			}),
+			play: vi.fn().mockImplementation(() => {
+				audio.paused = false;
+				return Promise.resolve();
+			}),
 		};
 		vi.stubGlobal("Audio", function () {
 			return audio;
@@ -132,7 +151,7 @@ describe("source preview playback ownership", () => {
 			},
 		);
 		// Execute mocked effects explicitly so the asynchronous load can finish between syncs.
-		useAudioPreviewSync({
+		const params = {
 			audioRegions: [],
 			previewVolume: 1,
 			isPlaying: playing,
@@ -146,14 +165,28 @@ describe("source preview playback ownership", () => {
 			isCurrentClipMuted: muted,
 			getSourceTrackPreviewGain: () => 1,
 			onSourceFallbackLoadError: vi.fn(),
-		});
+		};
+		useAudioPreviewSync(params);
 		for (const effect of harness.effects) effect();
 		await Promise.resolve();
 		expect(harness.loaded).toHaveBeenCalledOnce();
 		expect(audio.play).not.toHaveBeenCalled();
+		if (wasPlaying) audio.paused = false;
 		harness.effects.at(-1)?.();
 		await Promise.resolve();
 		expect(audio.play).toHaveBeenCalledTimes(plays ? 1 : 0);
-		if (plays) expect(audio.currentTime).toBeCloseTo(time - delay / 1000);
+		if (wasPlaying) expect(audio.pause).toHaveBeenCalled();
+		if (seeking) {
+			audio.seeking = false;
+			harness.effects.at(-1)?.();
+			await Promise.resolve();
+			expect(audio.play).toHaveBeenCalledOnce();
+		}
+		if (plays) {
+			expect(audio.currentTime).toBeCloseTo(time - delay / 1000);
+			harness.effects.at(-1)?.();
+			await Promise.resolve();
+			expect(audio.play).toHaveBeenCalledOnce();
+		}
 	});
 });

src/components/video-editor/audio/useAudioPreviewSync.ts

@@ -437,6 +437,7 @@ export function useAudioPreviewSync({
 				(isPlaying && Math.abs(audio.currentTime - targetTime) > 0.9);
 			if (shouldSeek) {
 				try {
+					if (!audio.paused) audio.pause();
 					audio.currentTime = targetTime;
 				} catch {
 					// no-op
@@ -453,7 +454,8 @@ export function useAudioPreviewSync({
 			const atEnd = audioDuration !== null && targetTime >= audioDuration;
 			if (isPlaying && !isCurrentClipMuted && !beforeAudioStart && !atEnd) {
 				void ensureSourceAudioRunning().then(() => {
-					if (!cancelled) audio.play().catch(() => undefined);
+					if (!cancelled && audio.paused && !audio.seeking)
+						audio.play().catch(() => undefined);
 				});
 			} else if (!audio.paused) {
 				audio.pause();

src/components/video-editor/hooks/useClipRegionCommands.test.ts

@@ -0,0 +1,51 @@
+import { describe, expect, it, vi } from "vitest";
+import type { ClipRegion } from "../types";
+import { useClipRegionCommands } from "./useClipRegionCommands";
+
+vi.mock("react", async (importOriginal) => ({
+	...(await importOriginal<typeof import("react")>()),
+	useCallback: (callback: unknown) => callback,
+}));
+
+describe("clip split selection", () => {
+	it("selects the middle section after two cuts so Delete removes it", () => {
+		let clips: ClipRegion[] = [{ id: "original", startMs: 0, endMs: 3_000, speed: 1 }];
+		let selectedClipId: string | null = null;
+		const nextClipIdRef = { current: 1 };
+		const setClipRegions = (value: ClipRegion[] | ((current: ClipRegion[]) => ClipRegion[])) => {
+			clips = typeof value === "function" ? value(clips) : value;
+		};
+		const setSelectedClipId = (value: string | null) => {
+			selectedClipId = value;
+		};
+		const commands = () =>
+			useClipRegionCommands({
+				clipRegions: clips,
+				selectedClipId,
+				sourceDurationMs: 3_000,
+				nextClipIdRef,
+				setClipRegions,
+				setSelectedClipId,
+				setZoomRegions: () => {},
+				setAnnotationRegions: () => {},
+				setAudioRegions: () => {},
+				setSelectedZoomId: () => {},
+				setSelectedAnnotationId: () => {},
+				setSelectedAudioId: () => {},
+				setSelectedCaptionId: () => {},
+				setActiveEffectSection: () => {},
+				t: (key) => key,
+			});
+
+		commands().handleClipSplit(1_000);
+		expect(selectedClipId).toBe(clips[0].id);
+		selectedClipId = null;
+		commands().handleClipSplit(2_000);
+		expect(selectedClipId).toBe(clips[1].id);
+		commands().handleClipDelete(selectedClipId!);
+		expect(clips).toMatchObject([
+			{ startMs: 0, endMs: 1_000 },
+			{ startMs: 1_000, endMs: 2_000, sourceStartMs: 2_000 },
+		]);
+	});
+});

src/components/video-editor/hooks/useClipRegionCommands.ts

@@ -102,9 +102,9 @@ export function useClipRegionCommands({
 					clip.id === plan.targetId ? [plan.left, plan.right] : [clip],
 				),
 			);
-			if (selectedClipId === plan.targetId) setSelectedClipId(plan.left.id);
+			handleSelectClip(plan.left.id);
 		},
-		[clipRegions, nextClipIdRef, selectedClipId, setClipRegions, setSelectedClipId],
+		[clipRegions, nextClipIdRef, setClipRegions, handleSelectClip],
 	);
 
 	const handleClipSpanChange = useCallback(

src/components/video-editor/videoPlayback/clipPlayback.test.ts

@@ -37,9 +37,14 @@ describe("clip timeline playback", () => {
 			duration: 12,
 			currentTime: 0,
 			seeking: false,
+			paused: true,
 			playbackRate: 1,
-			play: vi.fn(async () => {}),
-			pause: vi.fn(),
+			play: vi.fn(async () => {
+				video.paused = false;
+			}),
+			pause: vi.fn(() => {
+				video.paused = true;
+			}),
 		} as unknown as HTMLVideoElement;
 		const onTime = vi.fn();
 		const onPlaying = vi.fn();
@@ -75,6 +80,30 @@ describe("clip timeline playback", () => {
 		advance(1);
 		expect(onTime).toHaveBeenLastCalledWith(2.801, 3.501);
 	});
+	it("pauses source playback until a cut seek finishes", async () => {
+		const { video, playback } = setup([
+			{ id: "a", startMs: 0, endMs: 1_000, sourceStartMs: 0, speed: 1 },
+			{ id: "b", startMs: 1_000, endMs: 2_000, sourceStartMs: 5_000, speed: 1 },
+		]);
+		await playback.play();
+		const playCount = vi.mocked(video.play).mock.calls.length;
+		let sourceTime = 0;
+		Object.defineProperty(video, "currentTime", {
+			get: () => sourceTime,
+			set: (value: number) => {
+				sourceTime = value;
+				if (value === 5) Object.assign(video, { seeking: true });
+			},
+		});
+		video.currentTime = 1;
+		advance(1);
+		expect(video.pause).toHaveBeenCalled();
+		expect(video.currentTime).toBe(5);
+		expect(video.play).toHaveBeenCalledTimes(playCount);
+		Object.assign(video, { seeking: false });
+		advance(1);
+		expect(video.play).toHaveBeenCalledTimes(playCount + 1);
+	});
 	it("cannot simulate playback after the final clip is deleted", async () => {
 		const { video, playback, onTime } = setup([]);
 		await playback.play();

src/components/video-editor/videoPlayback/clipPlayback.ts

@@ -100,10 +100,14 @@ export function createClipPlayback({
 				// asynchronous seek in Chromium (especially disruptive at zero).
 				if (Math.abs(video.currentTime - target) > 1e-8) {
 					onSourceSeek?.(playing && !seek ? "cut" : "seek");
+					if (playing) {
+						playRequest++;
+						video.pause();
+					}
 					video.currentTime = target;
 				}
 			}
-			if (playing && (seek || clip !== activeClip)) playSource();
+			if (playing && (seek || clip !== activeClip) && !video.seeking) playSource();
 		} else {
 			playRequest++;
 			video.pause();
@@ -134,8 +138,12 @@ export function createClipPlayback({
 		lastTick = now;
 		sync();
 		if (!playing) return;
-		if (timeMs >= duration()) pause();
-		else request = requestAnimationFrame(tick);
+		if (timeMs >= duration()) {
+			pause();
+		} else {
+			if (activeClip && !video.seeking && video.paused) playSource();
+			request = requestAnimationFrame(tick);
+		}
 	};
 	return {
 		get isPlaying() {

tests/ui/clip-cut-delete.spec.ts

@@ -0,0 +1,36 @@
+import { expect, test } from "@playwright/test";
+import { installDesktopBridge } from "./bridge";
+
+test.use({ channel: process.env.RECORDLY_TEST_BROWSER_CHANNEL === "chrome" ? "chrome" : undefined });
+
+test("two cuts select the middle clip for deletion", async ({ page }) => {
+	await installDesktopBridge(page, "filmstrip.mp4");
+	await page.goto("/?windowType=editor");
+	const clips = page.locator('[data-variant="clip"]');
+	await expect(clips).toHaveCount(1, { timeout: 20_000 });
+	const firstClip = await clips.first().boundingBox();
+	const timeline = page.locator(".select-none.bg-editor-bg.relative.cursor-pointer.group.flex.flex-col").last();
+	const canvas = await timeline.boundingBox();
+	if (!firstClip || !canvas) throw new Error("Timeline is not visible");
+
+	await page.mouse.click(firstClip.x + firstClip.width * 0.25, canvas.y + 6);
+	await page.getByRole("button", { name: /Split Clip/ }).click();
+	await expect(clips).toHaveCount(2);
+	await page.mouse.click(firstClip.x + firstClip.width * 0.5, canvas.y + 6);
+	await page.getByRole("button", { name: /Split Clip/ }).click();
+	await expect(clips).toHaveCount(3);
+
+	await page.keyboard.press("Delete");
+	await expect(clips).toHaveCount(2);
+	const firstEnd = Number(await clips.nth(0).getAttribute("data-end-ms"));
+	const lastStart = Number(await clips.nth(1).getAttribute("data-start-ms"));
+	expect(lastStart).toBe(firstEnd);
+	const lastClip = await clips.nth(1).boundingBox();
+	if (!lastClip) throw new Error("Retained clip is not visible");
+	await page.mouse.click(lastClip.x + Math.min(8, lastClip.width / 4), canvas.y + 6);
+	await expect
+		.poll(() =>
+			page.locator('video[src*="filmstrip.mp4"]').evaluate((video: HTMLVideoElement) => video.currentTime),
+		)
+		.toBeGreaterThan((firstEnd + 500) / 1_000);
+});