fix(structure): group components into groups inside the repo

ts_web/elements/00group-pdf/dees-pdf-shared/CanvasPool.ts

@@ -0,0 +1,135 @@
+export interface PooledCanvas {
+  canvas: HTMLCanvasElement;
+  ctx: CanvasRenderingContext2D;
+  inUse: boolean;
+  lastUsed: number;
+}
+
+export class CanvasPool {
+  private static pool: PooledCanvas[] = [];
+  private static maxPoolSize = 20;
+  private static readonly MIN_CANVAS_SIZE = 256;
+  private static readonly MAX_CANVAS_SIZE = 4096;
+
+  public static acquire(width: number, height: number): PooledCanvas {
+    // Try to find a suitable canvas from the pool
+    const suitable = this.pool.find(
+      (item) => !item.inUse &&
+      item.canvas.width >= width &&
+      item.canvas.height >= height &&
+      item.canvas.width <= width * 1.5 &&
+      item.canvas.height <= height * 1.5
+    );
+
+    if (suitable) {
+      suitable.inUse = true;
+      suitable.lastUsed = Date.now();
+
+      // Clear and resize if needed
+      suitable.canvas.width = width;
+      suitable.canvas.height = height;
+      suitable.ctx.clearRect(0, 0, width, height);
+
+      return suitable;
+    }
+
+    // Create new canvas if pool not full
+    if (this.pool.length < this.maxPoolSize) {
+      const canvas = document.createElement('canvas');
+      const ctx = canvas.getContext('2d', {
+        alpha: true,
+        desynchronized: true,
+      }) as CanvasRenderingContext2D;
+
+      canvas.width = Math.min(Math.max(width, this.MIN_CANVAS_SIZE), this.MAX_CANVAS_SIZE);
+      canvas.height = Math.min(Math.max(height, this.MIN_CANVAS_SIZE), this.MAX_CANVAS_SIZE);
+
+      const pooledCanvas: PooledCanvas = {
+        canvas,
+        ctx,
+        inUse: true,
+        lastUsed: Date.now(),
+      };
+
+      this.pool.push(pooledCanvas);
+      return pooledCanvas;
+    }
+
+    // Evict and reuse least recently used canvas
+    const lru = this.pool
+      .filter((item) => !item.inUse)
+      .sort((a, b) => a.lastUsed - b.lastUsed)[0];
+
+    if (lru) {
+      lru.canvas.width = width;
+      lru.canvas.height = height;
+      lru.ctx.clearRect(0, 0, width, height);
+      lru.inUse = true;
+      lru.lastUsed = Date.now();
+      return lru;
+    }
+
+    // Fallback: create temporary canvas (shouldn't normally happen)
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
+    canvas.width = width;
+    canvas.height = height;
+
+    return {
+      canvas,
+      ctx,
+      inUse: true,
+      lastUsed: Date.now(),
+    };
+  }
+
+  public static release(pooledCanvas: PooledCanvas) {
+    if (this.pool.includes(pooledCanvas)) {
+      pooledCanvas.inUse = false;
+      // Clear canvas to free memory
+      pooledCanvas.ctx.clearRect(0, 0, pooledCanvas.canvas.width, pooledCanvas.canvas.height);
+    }
+  }
+
+  public static releaseAll() {
+    for (const item of this.pool) {
+      item.inUse = false;
+      item.ctx.clearRect(0, 0, item.canvas.width, item.canvas.height);
+    }
+  }
+
+  public static destroy() {
+    for (const item of this.pool) {
+      item.canvas.width = 0;
+      item.canvas.height = 0;
+    }
+    this.pool = [];
+  }
+
+  public static getStats() {
+    return {
+      poolSize: this.pool.length,
+      maxPoolSize: this.maxPoolSize,
+      inUse: this.pool.filter((item) => item.inUse).length,
+      available: this.pool.filter((item) => !item.inUse).length,
+    };
+  }
+
+  public static adjustPoolSize(newSize: number) {
+    if (newSize < this.pool.length) {
+      // Remove excess canvases
+      const toRemove = this.pool.length - newSize;
+      const removed = this.pool
+        .filter((item) => !item.inUse)
+        .slice(0, toRemove);
+
+      for (const item of removed) {
+        const index = this.pool.indexOf(item);
+        if (index > -1) {
+          this.pool.splice(index, 1);
+        }
+      }
+    }
+    this.maxPoolSize = newSize;
+  }
+}

ts_web/elements/00group-pdf/dees-pdf-shared/PdfManager.ts

@@ -0,0 +1,36 @@
+import { domtools } from '@design.estate/dees-element';
+
+export class PdfManager {
+  private static pdfjsLib: any;
+  private static initialized = false;
+
+  public static async initialize() {
+    if (this.initialized) return;
+
+    // @ts-ignore
+    this.pdfjsLib = await import('https://cdn.jsdelivr.net/npm/pdfjs-dist@4.0.379/+esm');
+    this.pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdn.jsdelivr.net/npm/pdfjs-dist@4.0.379/build/pdf.worker.mjs';
+
+    this.initialized = true;
+  }
+
+  public static async loadDocument(url: string): Promise<any> {
+    await this.initialize();
+
+    // IMPORTANT: Disabled caching to ensure component isolation
+    // Each viewer instance gets its own document to prevent state sharing
+    // This fixes issues where multiple viewers interfere with each other
+    const loadingTask = this.pdfjsLib.getDocument(url);
+    const document = await loadingTask.promise;
+
+    return document;
+  }
+
+  public static releaseDocument(_url: string) {
+    // No-op since we're not caching documents anymore
+    // Each viewer manages its own document lifecycle
+  }
+
+  // Cache methods removed to ensure component isolation
+  // Each viewer now manages its own document lifecycle
+}

ts_web/elements/00group-pdf/dees-pdf-shared/index.ts

@@ -0,0 +1,3 @@
+export * from './CanvasPool.js';
+export * from './PdfManager.js';
+export * from './utils.js';

ts_web/elements/00group-pdf/dees-pdf-shared/utils.ts

@@ -0,0 +1,98 @@
+export function debounce<T extends (...args: any[]) => any>(
+  func: T,
+  wait: number
+): (...args: Parameters<T>) => void {
+  let timeout: number | undefined;
+
+  return function executedFunction(...args: Parameters<T>) {
+    const later = () => {
+      clearTimeout(timeout);
+      func(...args);
+    };
+
+    clearTimeout(timeout);
+    timeout = window.setTimeout(later, wait);
+  };
+}
+
+export function throttle<T extends (...args: any[]) => any>(
+  func: T,
+  limit: number
+): (...args: Parameters<T>) => void {
+  let inThrottle: boolean;
+
+  return function executedFunction(...args: Parameters<T>) {
+    if (!inThrottle) {
+      func.apply(this, args);
+      inThrottle = true;
+      setTimeout(() => inThrottle = false, limit);
+    }
+  };
+}
+
+export function formatFileSize(bytes: number): string {
+  if (bytes === 0) return '0 Bytes';
+
+  const k = 1024;
+  const sizes = ['Bytes', 'KB', 'MB', 'GB'];
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+  return Math.round(bytes / Math.pow(k, i) * 100) / 100 + ' ' + sizes[i];
+}
+
+export function isInViewport(element: Element, margin = 0): boolean {
+  const rect = element.getBoundingClientRect();
+  return (
+    rect.top >= -margin &&
+    rect.left >= -margin &&
+    rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) + margin &&
+    rect.right <= (window.innerWidth || document.documentElement.clientWidth) + margin
+  );
+}
+
+export class PerformanceMonitor {
+  private static marks = new Map<string, number>();
+  private static measures: Array<{ name: string; duration: number }> = [];
+
+  public static mark(name: string) {
+    this.marks.set(name, performance.now());
+  }
+
+  public static measure(name: string, startMark: string) {
+    const start = this.marks.get(startMark);
+    if (start) {
+      const duration = performance.now() - start;
+      this.measures.push({ name, duration });
+      this.marks.delete(startMark);
+      return duration;
+    }
+    return 0;
+  }
+
+  public static getReport() {
+    const report = {
+      measures: [...this.measures],
+      averages: {} as Record<string, number>,
+    };
+
+    // Calculate averages for repeated measures
+    const grouped = new Map<string, number[]>();
+    for (const measure of this.measures) {
+      if (!grouped.has(measure.name)) {
+        grouped.set(measure.name, []);
+      }
+      grouped.get(measure.name)!.push(measure.duration);
+    }
+
+    for (const [name, durations] of grouped) {
+      report.averages[name] = durations.reduce((a, b) => a + b, 0) / durations.length;
+    }
+
+    return report;
+  }
+
+  public static clear() {
+    this.marks.clear();
+    this.measures = [];
+  }
+}