Class ViewPerformanceService

src/services/ViewPerformanceService.ts:26–344

 * Provides change detection, debouncing, batching, and memory management
 */
export class ViewPerformanceService {
	private plugin: ViewPerformanceServiceContext;

	// Global task version cache shared across all views
	private globalTaskVersionCache = new Map<string, string>();
	private lastGlobalRefreshTime = 0;
	private globalTaskCount = 0;

	// View-specific state
	private viewHandlers = new Map<string, ViewUpdateHandler>();
	private viewDebounceTimers = new Map<string, number>();
	private viewPendingUpdates = new Map<string, Set<string>>();
	private viewConfigs = new Map<string, ViewPerformanceConfig>();

	// Event coordination
	private updateInProgress = new Set<string>();
	private eventListener: unknown = null;

	constructor(plugin: ViewPerformanceServiceContext) {
		this.plugin = plugin;
		this.setupGlobalEventListener();
	}

	/**
	 * Register a view with the performance service
	 */
	registerView(config: ViewPerformanceConfig, handler: ViewUpdateHandler): void {
		this.viewConfigs.set(config.viewId, {
			debounceDelay: 100,
			maxBatchSize: 5,
			changeDetectionEnabled: true,
			...config,
		});
		this.viewHandlers.set(config.viewId, handler);
		this.viewPendingUpdates.set(config.viewId, new Set());
	}

	/**
	 * Unregister a view from the performance service
	 */
	unregisterView(viewId: string): void {
		// Clean up debounce timer
		const timer = this.viewDebounceTimers.get(viewId);
		if (timer) {
			window.clearTimeout(timer);
			this.viewDebounceTimers.delete(viewId);
		}

		// Clean up state
		this.viewConfigs.delete(viewId);
		this.viewHandlers.delete(viewId);
		this.viewPendingUpdates.delete(viewId);
		this.updateInProgress.delete(viewId);
	}

	/**
	 * Setup global event listener for task updates
	 */