The `cffi` module gives full control of a GTK widget to a third-party dynamic library, to create more complex modules using different programming languages.

### Config

Addressed by `cffi/<name>`

|     option    | typeof | default |                          description                           |
|---------------|--------|---------|----------------------------------------------------------------|
| `module_path` | string |         | The path to the dynamic library to load to control the widget. |

Some additional configuration may be required depending on the cffi dynamic library being used.

### Style

The classes and IDs are managed by the cffi dynamic library.


#### Examples:

##### C example:

`~/.config/waybar/config`
```jsonc
"cffi/c_example": {
    "module_path": ".config/waybar/cffi/wb_cffi_example.so"
}
```

#### Developing new CFFI modules

CFFI modules require a handful of functions and constants to be defined with C linkage. The method to achieve this depends on the programming language being used (search for FFI / Foreign Function Interface).

An example written in C can be found in [resources/custom_modules/cffi_example/](https://github.com/Alexays/Waybar/tree/master/resources/custom_modules/cffi_example/)

The list of symbols to define can be found in [resources/custom_modules/cffi_example/waybar_cffi_module.h](https://github.com/Alexays/Waybar/tree/master/resources/custom_modules/cffi_example/waybar_cffi_module.h)


##### Known CFFI modules

- [waylyrics](https://github.com/PandeCode/waylyrics) - Module to display sync lyrics current line of in spotify.

- [libwaybar_cffi_lyrics](https://github.com/switchToLinux/libwaybar_cffi_lyrics) , 一个歌词显示插件，支持 musicfox 和支持mpris协议的播放器。


If you develop your own module, please add it here.

##### Known CFFI language bindings

- [Rust](https://crates.io/crates/waybar-cffi)