A macOS Quick Look extension that provides syntax-highlighted previews for Visual Studio Solution files (.sln and .slnx).

• 🎨 Syntax Highlighting - Color-coded XML and text-based solution files
• 🔢 Line Numbers - Easy reference with line numbers on the left
• 📋 Smart Copy - Copy text without line numbers automatically
• 🌙 Dark Theme - VS Code-inspired color scheme
• ⚡ Fast & Lightweight - Native Swift implementation, no dependencies
• 🔒 Sandboxed - Secure Quick Look extension

• .sln - Visual Studio Solution files (text-based format)
• .slnx - Visual Studio XML Solution files (XML format)

Both traditional text-based .sln files and modern XML-based .slnx files are supported with appropriate syntax highlighting.

# Add the tap (once)
brew tap lewiuberg/tap

# Install SlnQuickLook
brew install --cask slnquicklook

After installation:

1. Open the SlnQuickLook app once to register the extension
   • If macOS blocks it (unsigned app warning):
     • Go to System Settings → Privacy & Security
     • Scroll down and click "Open Anyway"
     • Try opening the app again and confirm
2. Reset Quick Look: qlmanage -r && qlmanage -r cache
3. Restart Finder: killall Finder
4. Select a .sln or .slnx file and press Space to preview

1. Download the latest release from Releases
2. Unzip and move SlnQuickLook.app to /Applications/
3. Open the app once to register the Quick Look extension
   • If macOS blocks it (unsigned app warning):
     • Go to System Settings → Privacy & Security
     • Scroll down and click "Open Anyway"
     • Try opening the app again and confirm
4. Reset Quick Look cache:

   qlmanage -r && qlmanage -r cache

5. Restart Finder: killall Finder

Requirements:

• macOS 12.0 (Monterey) or later
• Xcode 14.0 or later

# Clone the repository
git clone https://github.com/lewiuberg/SlnQuickLook.git
cd SlnQuickLook

# Open in Xcode
open SlnQuickLook.xcodeproj

# Build and run (⌘R)
# The extension will be registered automatically

1. Preview a file: Select a .sln or .slnx file in Finder and press Space
2. Copy content: Select text in the preview and press ⌘C - line numbers are automatically excluded
3. Scroll: Use mouse/trackpad to scroll through large files
4. Close preview: Press Space or Esc

1. Make sure you've opened the SlnQuickLook app at least once
2. Reset Quick Look:

   qlmanage -r
   qlmanage -r cache
   killall Finder

3. Check if the extension is loaded:

   qlmanage -m

   Look for SlnQuickLook in the output

If another app is opening .sln/.slnx files:

1. Right-click the file → Get Info
2. Under "Open with:", select SlnQuickLook
3. Click "Change All..."

Try re-registering the app:

/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -f -R /Applications/SlnQuickLook.app

• Language: Swift 5.0
• Framework: QuickLook, AppKit
• Minimum macOS: 12.0 (Monterey)
• Code Signing: Required for distribution

The extension provides custom syntax highlighting:

XML-based files (.slnx):

• Green: XML tags (<Project>, </Solution>)
• Blue: Attribute names (Path=, Name=)
• Orange: Attribute values ("src/...")

Text-based files (.sln):

• Green: Keywords (Project, EndProject, Global)
• Orange: String values (quoted text)
• Gray: Comments (lines starting with #)

• Handles files up to several MB efficiently
• Lazy rendering for large files
• No external dependencies
• Minimal memory footprint

SlnQuickLook/
├── SlnQuickLook/                    # Main app (hosts extension)
│   ├── Assets.xcassets/
│   ├── Info.plist
│   ├── SlnQuickLookApp.swift
│   └── ContentView.swift
└── SlnQuickLookPreviewExtension/    # Quick Look extension
    ├── Info.plist
    └── PreviewViewController.swift  # All logic

# Debug build
xcodebuild -scheme SlnQuickLook -configuration Debug

# Release build
xcodebuild -scheme SlnQuickLook -configuration Release

# Run tests (if any)
xcodebuild test -scheme SlnQuickLook

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Please ensure:

• Code follows Swift style guidelines
• Changes are tested on macOS 12.0+
• Commit messages are clear and descriptive

This project is licensed under the MIT License - see the LICENSE file for details.

• Inspired by Quick Look extensions like QLMarkdown
• Color scheme inspired by Visual Studio Code's Dark+ theme
• Built with Apple's QuickLook framework

Lewi Uberg

• GitHub: @lewiuberg

If you find this useful, please:

• ⭐ Star the repository
• 🐛 Report bugs via Issues
• 💡 Suggest features via Issues
• 🔀 Submit pull requests