unohelper's Introduction

UNOHelper

UNOHelper offers helper functions for working with the LibreOffice UNO API.

It wraps commonly used functions from the UNO API for easier use.

Build

The following applications have to be installed to compile UNOHelper:

First fetch the sources:

git clone https://github.com/LibreOffice/UNOHelper.git

Then build the package:

mvn clean package

To create a single jar (to be used in non-Maven projects), run this command instead:

mvn clean assembly:single

Release

First, make sure that Javadoc has no errors (warnings are ok though):

mvn javadoc:javadoc

Then do a dry run:

mvn -Dresume=false -DdryRun=true release:prepare

Now do the release. Caution: This creates two commits & a tag and pushes them directly to Git!)

mvn -Dresume=false release:prepare release:perform

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unohelper's Issues

Convert a Multi-Page Text/word file to PNG using LibreOffice API in JAVA

How to convert a Multi-Page Text file to PNG, for example:- I have a Text document of 5 pages and I want to convert that into PNG. By default, it's giving a PNG of only 1st page. How to get the PNG file for ith page using LibreOffice.

I used the PageRange filter like this, but it does not work, it's also giving the PNG only for 1st page.

Also, I'm not able to generate multiple PNGs for multi-page word files using the LibreOffice Application

CLI:-

soffice --convert-to 'png:writer_png_Export:{"PageRange":{"type":"string","value":"2-"}}' test.odt

JAVA:-

conversionProperties[0] = new com.sun.star.beans.PropertyValue();
conversionProperties[0].Name = "FilterName";
conversionProperties[0].Value ="writer_png_Export";

conversionProperties[1] = new com.sun.star.beans.PropertyValue();
conversionProperties[1].Name = "PageRange";
conversionProperties[1].Value ="2-";