LibreOffice OFD UNO Extension

A LibreOffice extension for opening OFD (Open Fixed-layout Document) files in LibreOffice Draw.

Overview

This extension enables OFD support in LibreOffice by converting OFD → SVG. Key features:

• Automatic font mapping (Windows fonts → Linux open-source fonts)
• Font missing warnings
• Read-only mode
• Chinese language support

Project Structure

src/main/java/org/loongoffice/ofd/
├── reader/          # Core filter (OFDImportFilter)
├── converter/       # OFD → SVG converter
├── document/        # Document handling
├── font/            # Font checking utilities
├── util/            # Utilities (MessageBox, TempFileManager, etc.)
└── config/          # Font mapping configuration

Usage

Installation

# Build extension
mvn clean package -DskipTests

# Install to LibreOffice
/usr/bin/unopkg add target/ofd-reader.oxt

Opening OFD Files

After installation, simply open .ofd files in LibreOffice.

Font Mapping Configuration

Font mapping file locations (by priority):

1. ~/.loongoffice/font-mappings.properties
2. /etc/loongoffice/font-mappings.properties
3. Default configuration in JAR

Documentation

• docs/ - Technical documentation

Tech Stack

• Java 17
• ofdrw 2.3.8 (OFD processing library)
• LibreOffice UNO 24.8.4
• Maven

License

MPL-2.0