SVG2DrawIOLib 1.1.2

Generate DrawIO shape libraries from SVGs

SVG2DrawIOLib

Convert SVG files into DrawIO/diagrams.net shape libraries with support for colorable icons.

Features

• ✨ Batch Conversion: Process individual files, entire directories, or recursive folder structures
• 🎯 Pixel-Perfect Rendering: Browser-accurate bounding box calculation (via svgelements) eliminates padding and ensures icons render exactly as designed
• 🎨 Color Customization: Inject CSS classes to enable color editing directly in DrawIO's interface
• 📏 Flexible Sizing: Proportional scaling with aspect ratio preservation, or fixed dimensions
• 📚 Library Management: Create new libraries, add/remove icons, and list contents
• 🚀 Modern CLI: Beautiful, colorful output with rich-click
• 🔧 Modern Python Stack: Built with ruff, mypy, bandit, pytest, and pre-commit hooks

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Quick Start

Installation

pip install SVG2DrawIOLib

Basic Usage

# Convert individual SVG files to DrawIO library
SVG2DrawIOLib create icon1.svg icon2.svg -o my-library.xml

# Convert all SVGs in a directory
SVG2DrawIOLib create icons/ -o my-library.xml

# Convert all SVGs in directory and subdirectories
SVG2DrawIOLib create icons/ -o my-library.xml --recursive

# Enable color editing in DrawIO
SVG2DrawIOLib create icons/ --css -o colorable-icons.xml

# Custom dimensions with proportional scaling
SVG2DrawIOLib create icons/ --max-size 64 -o large-icons.xml -R

Documentation

• Quick Start Guide - Get started quickly for users and developers
• Architecture - Technical details and implementation
• Contributing Guide - Development workflow
• Changelog - Version history

Commands

Create a Library

Create a new DrawIO library from SVG files:

# Basic usage
SVG2DrawIOLib create icon1.svg icon2.svg -o my-library.xml

# From directory
SVG2DrawIOLib create icons/ -o my-library.xml

# Recursive directory scan
SVG2DrawIOLib create icons/ -o my-library.xml --recursive

Add Icons to Library

Add new icons to an existing library:

# Add single icon
SVG2DrawIOLib add my-library.xml new-icon.svg

# Add multiple icons
SVG2DrawIOLib add my-library.xml icon1.svg icon2.svg

# Replace duplicates
SVG2DrawIOLib add my-library.xml icon.svg --replace

Remove Icons

Remove icons from a library by name:

SVG2DrawIOLib remove my-library.xml icon-name1 icon-name2

List Icons

List all icons in a library:

SVG2DrawIOLib list my-library.xml

Split Compound Paths

Split SVG paths with multiple shapes into separate paths for per-path color control:

# Split compound paths in an SVG
SVG2DrawIOLib split-paths icon.svg -o icon-split.svg

# Then create library with CSS enabled
SVG2DrawIOLib create icon-split.svg --css -o colorable-icon.xml

This command:

• Detects paths with multiple M/m (moveto) commands
• Splits them into separate path elements
• Automatically preserves "donut holes" (nested paths)
• Adds CSS classes for individual color control

Useful for icons that have a single compound path but multiple distinct shapes.

Advanced Features

Color Editing

Enable color customization in DrawIO by injecting CSS classes:

SVG2DrawIOLib create icons/ --css -o colorable-icons.xml

This allows users to change icon colors directly in DrawIO's interface. For icons with compound paths (single path containing multiple shapes), use split-paths first to enable per-shape color control.

Proportional Scaling

Scale icons proportionally while maintaining aspect ratio:

# Scale so longest side is 64px
SVG2DrawIOLib create icons/ --max-size 64 -o large-icons.xml

Fixed Dimensions

Set exact dimensions for all icons:

SVG2DrawIOLib create icons/ --width 50 --height 50 -o square-icons.xml

Custom Configuration

# Custom XML namespace
SVG2DrawIOLib create icons/ --namespace "http://custom.ns" -o library.xml

# Custom CSS tag for color editing
SVG2DrawIOLib create icons/ --css --tag "circle" -o library.xml

# Custom CSS color
SVG2DrawIOLib create icons/ --css --css-color "#FF0000" -o library.xml

How It Works

SVG2DrawIOLib converts SVG files into DrawIO's custom library format:

1. Parses SVG files and extracts dimensions
2. Optionally injects CSS classes for color editing support
3. Encodes SVG as data URI with base64 encoding
4. Wraps in mxGraphModel XML structure
5. Compresses using zlib deflate algorithm
6. Generates library XML compatible with DrawIO

For technical details about the conversion process, see ARCHITECTURE.md.

Python API

Use SVG2DrawIOLib programmatically:

from pathlib import Path
from SVG2DrawIOLib import SVGProcessor, LibraryManager, SVGProcessingOptions

# Configure processing options
options = SVGProcessingOptions(add_css=True, css_color="#000000")

# Process SVG file
processor = SVGProcessor(options)
icon = processor.process_svg_file(Path("icon.svg"), max_dimension=64)

# Create library
manager = LibraryManager()
metadata = manager.create_library([icon], Path("library.xml"))

print(f"Created library with {metadata.icon_count} icons")

For complete API documentation, see ARCHITECTURE.md.

License

SVG2DrawIOLib is distributed under the terms of the MIT license.