WidgetCore 🚀 (Windows Optimized)

WidgetCore is a high-performance, Windows-optimized library built with Node.js and C++ for creating interactive and persistent desktop widgets. By leveraging the native Win32 API and WebView2, WidgetCore provides a lightweight, hardware-accelerated experience that feels like a natural part of the Windows desktop.

🏗️ Architecture: The Node-Native Bridge

WidgetCore uses a sophisticated hybrid architecture to combine the rapid development of web technologies with the power of native system APIs.

1. The Win32 Message Loop

Unlike standard Node.js applications that run on a single thread, WidgetCore spawns a dedicated, detached Win32 thread for each widget. This ensures that:

• The Node.js event loop remains unblocked.
• Window messages (resizing, clicking, painting) are handled with sub-millisecond latency.
• The widget remains responsive even if the main Node.js process is busy with heavy computations.

2. OLE/COM Browser Hosting

WidgetCore embeds the Microsoft WebView2 engine (Edge/Chromium) using the IWebBrowser2 interface (via OLE). This provides:

• Full HTML5/CSS3/ES6 support.
• Hardware-accelerated rendering.
• Low memory footprint compared to full Electron shells.

graph TD
    A[Node.js Logic] -- Node-API (C++) --> B[WidgetManager]
    B -- std::thread --> C[Detached Message Loop]
    C -- Win32 API --> D[WS_EX_LAYERED Window]
    D -- OLE/COM --> E[WebView2 Engine]
    E --> F[Example: Cyber-Glow Widget]

✨ The "Cyber-Glow" Mode (Native Features)

WidgetCore is designed for high-end desktop aesthetics. It implements several advanced Win32 techniques:

🖼️ Aggressive Transparency

Using WS_EX_LAYERED and LWA_COLORKEY, WidgetCore achieves true transparency. The native layer uses a specific color key (RGB(1, 1, 1)) as the transparency mask, allowing for:

• Non-rectangular widget shapes.
• Anti-aliased "glow" effects that blend into the wallpaper.
• No ugly borders or standard window decorations.

🌌 DWM Blur Behind

By interfacing with dwmapi.dll, WidgetCore can enable the Aero Glass / Acrylic effect behind your widget.

• Config: Set blur: true in WidgetOptions.
• Effect: The background of your widget will have a beautiful, frosted-glass blur that interacts with the wallpaper.

🖱️ Click-Through Interactivity

You can control how the widget interacts with the mouse:

• Interactive (true): The widget behaves like a normal window (receives clicks).
• Click-Through (false): Mouse events pass directly through the widget to the desktop icons or other windows behind it.

🔒 Security Shield Architecture

Security is baked into the core. Every widget is wrapped in a multi-stage Security Shield:

1. Context Isolation: Injected CSS and JS freeze the environment. Standard Node.js entry points (process, require) are purged before the widget content loads.
2. Protocol Filtering: Only http:, https:, and strictly validated file:/// protocols are permitted. This prevent javascript: or data: URL exploits.
3. Keyword Scanning: All input triggers (URLs and HTML blobs) are scanned for high-risk system keywords (shell, exec, eval, process).

💾 Persistence & Standalone Execution

WidgetCore widgets can survive system reboots and process crashes.

1. The Registry Lifecycle

The AutostartManager interfaces with the Windows Registry: HKCU\Software\Microsoft\Windows\CurrentVersion\Run It creates a unique entry for each persistent widget that triggers a runner.js script on login.

2. Standalone Runner

The runner.js is a lightweight entry point that reconstructs a widget instance from the widgets.json registry file without requiring the primary application to be running.

🚀 Getting Started

Installation

npm install @osmn-byhn/widget-core-windows

Note: Requires Visual Studio Build Tools and Node-GYP for native compilation.

Basic Usage

import { DesktopWidget } from '@osmn-byhn/widget-core-windows';

const widget = new DesktopWidget("https://my-widget-dashboard.com", {
  width: 350,
  height: 500,
  x: 100,
  y: 100,
  opacity: 0.9,
  blur: true,      // Glass effect
  sticky: true     // Stays on bottom
});

🛠️ API Reference

WidgetOptions

| Property | Type | Default | Description | | :--- | :--- | :--- | :--- | | width / height | number | 400 | Dimensions in pixels. | | x / y | number | 100 | Screen coordinates (0,0 is top-left). | | opacity | number | 1.0 | Global alpha (0.0 - 1.0). | | blur | boolean | false | Enables DWM Blur Behind (Acrylic look). | | sticky | boolean | true | Pins the widget to the bottom layer (desktop). | | interactive | boolean | true | Set to false for click-through mode. | | html | string | "" | Direct HTML string if no URL is provided. |

DesktopWidget Methods

• setPosition(x, y): Real-time window movement.
• setOpacity(value): Smooth alpha transitions.
• makePersistent(options): Registers the widget for autostart.
• static stopAll(): Kills all running widget processes across the system.

📝 License

MIT License. Copyright (c) 2026 Osman Beyhan.