feat: clipboard with keyframe paste

Made-with: Cursor

apps/web/src/core/index.ts

@@ -8,6 +8,7 @@ import { CommandManager } from "./managers/commands";
 import { SaveManager } from "./managers/save-manager";
 import { AudioManager } from "./managers/audio-manager";
 import { SelectionManager } from "./managers/selection-manager";
+import { ClipboardManager } from "./managers/clipboard-manager";
 import { registerDefaultEffects } from "@/lib/effects";
 import { registerDefaultMasks } from "@/lib/masks";
 
@@ -23,6 +24,7 @@ export class EditorCore {
 	public readonly save: SaveManager;
 	public readonly audio: AudioManager;
 	public readonly selection: SelectionManager;
+	public readonly clipboard: ClipboardManager;
 
 	private constructor() {
 		registerDefaultEffects();
@@ -37,6 +39,8 @@ export class EditorCore {
 		this.save = new SaveManager(this);
 		this.audio = new AudioManager(this);
 		this.selection = new SelectionManager(this);
+		this.clipboard = new ClipboardManager(this);
+		this.playback.bindTimelineScope();
 		this.command.registerReactor(() => {
 			const activeScene = this.scenes.getActiveSceneOrNull();
 			if (!activeScene) {

apps/web/src/core/managers/clipboard-manager.ts

@@ -0,0 +1,81 @@
+import type { EditorCore } from "@/core";
+import {
+	buildPasteClipboardCommand,
+	copyClipboardEntry,
+	type ClipboardEntry,
+	type CopyContext,
+	type PasteContext,
+} from "@/lib/clipboard";
+
+export class ClipboardManager {
+	private entry: ClipboardEntry | null = null;
+	private listeners = new Set<() => void>();
+
+	constructor(private editor: EditorCore) {}
+
+	getEntry(): ClipboardEntry | null {
+		return this.entry;
+	}
+
+	hasEntry(): boolean {
+		return this.entry !== null;
+	}
+
+	copy(): boolean {
+		const entry = copyClipboardEntry({
+			context: this.getCopyContext(),
+		});
+		if (!entry) {
+			return false;
+		}
+
+		this.entry = entry;
+		this.notify();
+		return true;
+	}
+
+	paste({ time }: { time?: number } = {}): boolean {
+		if (!this.entry) {
+			return false;
+		}
+
+		const command = buildPasteClipboardCommand({
+			entry: this.entry,
+			context: this.getPasteContext({ time }),
+		});
+		if (!command) {
+			return false;
+		}
+
+		this.editor.command.execute({ command });
+		return true;
+	}
+
+	subscribe(listener: () => void): () => void {
+		this.listeners.add(listener);
+		return () => this.listeners.delete(listener);
+	}
+
+	private getCopyContext(): CopyContext {
+		return {
+			editor: this.editor,
+			selectedElements: this.editor.selection.getSelectedElements(),
+			selectedKeyframes: this.editor.selection.getSelectedKeyframes(),
+		};
+	}
+
+	private getPasteContext({ time }: { time?: number }): PasteContext {
+		return {
+			editor: this.editor,
+			selectedElements: this.editor.selection.getSelectedElements(),
+			selectedKeyframes: this.editor.selection.getSelectedKeyframes(),
+			time: time ?? this.editor.playback.getCurrentTime(),
+		};
+	}
+
+	private notify(): void {
+		this.listeners.forEach((listener) => {
+			listener();
+		});
+	}
+}