Fix #2

[yveszoundi]

initial support for password-protected files

• Implement setOptionalFeatures
  • It enables handling password-protected documents via Office::set_document_password
  • The relevant enumeration was manually adapted from C headers at this time
• Re-implement register_callback to make it more convenient
  • Create a C shim wrapping most of the boilerplate code
  • An improvement would be resolving callback types properly and linking values to a new enum
• Make the Office struct cloneable for use in callbacks
• Improve the signature of the document save_as function to give user feedback
  • It returns true if everything went well
  • The equivalent C signature return a non-zero value upon success

[undeflife]

Have you test your code ? I can't not get expected result of loading a password protected document by your given example in doc . LibreOffice crashed.

[yveszoundi]

Apologies, there were some left overs that I forgot to remove: the code was only tested on Void Linux.

I'll also provide along a minimal repo for reproducible tests.

I also just noticed some differences on Ubuntu (likely similar issues with Debian maybe): I'll review and test more later today.

[yveszoundi]

It is fixed, I had an issue with cargo and its cache on Ubuntu, I just targeted the last git sha for this pull request (in my reproducible test repo per notes below).

Reproducible results (re-tested on Void Linux and Ubuntu):

• git clone https://github.com/yveszoundi/libreoffice-rs-tests
• Update src/main.rs to reflect the file to test and the password
• Build and run the project LO_INCLUDE_PATH=/usr/include/LibreOfficeKit cargo run

[undeflife]

Great, it worked.