Decide which X11 rust interface to use

[FelixSchladt]

There has been some research been done in the concept phase, but this has not reached maturity and some further research is required:

X11

[Discussion] There seem to be two main libraries offering X11 bingings for rust: XCB wikipedia

Rust libraries: x11-rs x11rb xcb

Comparison between different X11 libraries

x11rb seems to offer some benefits:

• Purely written in rust -> less unsafe calls
• Aims to be similar to the modern xcb library instead of the old xlib
• Better documentation

I tend to use x11rb because of these reasons

[FelixSchladt]

Penrose seems to be historically based upon the rust-xcb library. This seems to be the reason for both libraries be marked as optional in the penrose Cargo.toml. Penrose therefore has two backends, an old one using rust-xcb and a newer one based upon x11rb.

https://github.com/sminez/penrose/issues/104 -> Initial proposal by x11rb Author https://github.com/sminez/penrose/pull/117 -> Implementation of the backend

As a conclusion: It seems like both libraries are fully capable of being used for writing a wm.

[FelixSchladt]

We have decided to base our Window manager upon the x11rb crate. This crate seems to offer the best documentation along with full feature support and is a pure rust implementation.