@mlightcad/common

The common package provides shared utilities and base classes that are used across the RealDWG-Web ecosystem. This package contains fundamental components for color management, event handling, logging, performance monitoring, and file loading operations.

Overview

This package serves as the foundation for the RealDWG-Web project, providing essential utilities and base classes that mimic AutoCAD ObjectARX's AcCm (Common) classes. It includes color management, event dispatching, logging utilities, performance monitoring, and file loading capabilities.

Key Features

• Color Management: Comprehensive color handling with support for AutoCAD color indices and RGB values
• Event System: Event dispatching and management for decoupled communication between components
• Logging: Structured logging utilities with different log levels
• Performance Monitoring: Tools for collecting and analyzing performance metrics
• File Loading: Asynchronous file loading with progress tracking and error handling
• Task Scheduling: Background task management and scheduling capabilities

Installation

npm install @mlightcad/common

Key Classes

Color Management

• AcCmColor: Represents colors in AutoCAD format with support for color indices and RGB values
• AcCmColorUtil: Utility functions for color conversion and manipulation

Event System

• AcCmEventDispatcher: Dispatches events to registered listeners
• AcCmEventManager: Manages event registration and dispatching across the application

Logging and Utilities

• AcCmLogUtil: Structured logging with different log levels (debug, info, warn, error)
• AcCmStringUtil: String manipulation and formatting utilities
• AcCmErrors: Error handling and custom error types

Performance and Tasks

• AcCmPerformanceCollector: Collects and analyzes performance metrics
• AcCmTaskScheduler: Manages background tasks and scheduling

File Loading

• AcCmFileLoader: Handles asynchronous file loading with progress tracking
• AcCmLoadingManager: Manages multiple file loading operations
• AcCmLoader: Base class for implementing custom file loaders

Base Classes

• AcCmObject: Base class for common objects with event handling capabilities

Usage Examples

Color Management

import { AcCmColor, AcCmColorUtil } from '@mlightcad/common';

// Create a color from AutoCAD color index
const color = new AcCmColor(1); // Red

// Create a color from RGB values
const rgbColor = new AcCmColor(255, 0, 0);

// Convert between formats
const rgb = AcCmColorUtil.toRgb(color);
const index = AcCmColorUtil.toColorIndex(rgbColor);

Event Handling

import { AcCmEventManager, AcCmEventDispatcher } from '@mlightcad/common';

// Create an event dispatcher
const dispatcher = new AcCmEventDispatcher();

// Register an event listener
dispatcher.addEventListener('fileLoaded', (event) => {
  console.log('File loaded:', event.data);
});

// Dispatch an event
dispatcher.dispatchEvent('fileLoaded', { fileName: 'drawing.dwg' });

Logging

import { AcCmLogUtil } from '@mlightcad/common';

// Configure logging
AcCmLogUtil.setLevel('info');

// Log messages
AcCmLogUtil.info('Application started');
AcCmLogUtil.warn('Deprecated feature used');
AcCmLogUtil.error('Failed to load file', error);

File Loading

import { AcCmFileLoader, AcCmLoadingManager } from '@mlightcad/common';

// Create a file loader
const loader = new AcCmFileLoader();

// Load a file with progress tracking
loader.load('drawing.dwg', {
  onProgress: (progress) => {
    console.log(`Loading: ${progress}%`);
  },
  onComplete: (data) => {
    console.log('File loaded successfully');
  },
  onError: (error) => {
    console.error('Failed to load file:', error);
  }
});

// Use loading manager for multiple files
const manager = new AcCmLoadingManager();
manager.addLoader(loader);
manager.start();

Dependencies

• loglevel: For logging functionality

API Documentation

For detailed API documentation, visit the RealDWG-Web documentation.

Contributing

This package is part of the RealDWG-Web monorepo. Please refer to the main project README for contribution guidelines.