I've added property "net.sf.jasperreports.export.text.isInputForm" on Static Text and Text Field that will make them into form input field on pdf export so the values are editable.
To build, clone the following project and execute "ant jar". File "jasperreports-master-SNAPSHOT.jar" will be created in the "dist" directory. May need a little bit more work to do. Appreciate if you'll test it and content me on any issues.